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 LoopFreeBlock --sifa.call.summarizer InterpretCallSummarizer --sifa.fluid SizeLimitFluid --sifa.intern.fluid SizeLimitFluid --sifa.simplification.technique SIMPLIFY_DDA -i ../../../trunk/examples/svcomp/product-lines/minepump_spec2_product54.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-efa34d5 [2019-09-19 08:51:39,951 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-19 08:51:39,953 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-19 08:51:39,964 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-09-19 08:51:39,964 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-09-19 08:51:39,965 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-09-19 08:51:39,966 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-09-19 08:51:39,968 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-09-19 08:51:39,970 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-09-19 08:51:39,971 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-09-19 08:51:39,971 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-09-19 08:51:39,973 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-09-19 08:51:39,973 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-19 08:51:39,974 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-19 08:51:39,975 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-19 08:51:39,976 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-19 08:51:39,976 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-19 08:51:39,977 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-19 08:51:39,979 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-19 08:51:39,981 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-19 08:51:39,982 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-19 08:51:39,983 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-19 08:51:39,984 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-19 08:51:39,985 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-19 08:51:39,987 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-09-19 08:51:39,987 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-09-19 08:51:39,987 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-09-19 08:51:39,988 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-09-19 08:51:39,988 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-09-19 08:51:39,989 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-09-19 08:51:39,989 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-19 08:51:39,990 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-19 08:51:39,991 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-19 08:51:39,991 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-19 08:51:39,992 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-19 08:51:39,992 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-19 08:51:39,993 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-19 08:51:39,993 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-19 08:51:39,993 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-19 08:51:39,994 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-19 08:51:39,995 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-19 08:51:39,995 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 [2019-09-19 08:51:40,010 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-19 08:51:40,011 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-19 08:51:40,012 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-09-19 08:51:40,013 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-09-19 08:51:40,013 INFO L138 SettingsManager]: * Use SBE=true [2019-09-19 08:51:40,013 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-19 08:51:40,014 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-19 08:51:40,014 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-09-19 08:51:40,014 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-19 08:51:40,014 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-19 08:51:40,014 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-19 08:51:40,015 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-19 08:51:40,015 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-19 08:51:40,015 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-19 08:51:40,016 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-19 08:51:40,016 INFO L138 SettingsManager]: * Use constant arrays=true [2019-09-19 08:51:40,016 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-19 08:51:40,017 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-19 08:51:40,017 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-19 08:51:40,017 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-09-19 08:51:40,017 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-09-19 08:51:40,017 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-19 08:51:40,018 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-19 08:51:40,018 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-19 08:51:40,018 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-09-19 08:51:40,018 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-09-19 08:51:40,018 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-19 08:51:40,019 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-09-19 08:51:40,019 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 -> LoopFreeBlock Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Call Summarizer -> InterpretCallSummarizer 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 [2019-09-19 08:51:40,078 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-19 08:51:40,097 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-19 08:51:40,101 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-19 08:51:40,102 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-19 08:51:40,102 INFO L275 PluginConnector]: CDTParser initialized [2019-09-19 08:51:40,103 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/minepump_spec2_product54.cil.c [2019-09-19 08:51:40,168 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/47853f1ea/4745e7244fa446a1bcbe66dfa7a3bcbd/FLAGc428c1356 [2019-09-19 08:51:40,671 INFO L306 CDTParser]: Found 1 translation units. [2019-09-19 08:51:40,671 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/minepump_spec2_product54.cil.c [2019-09-19 08:51:40,685 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/47853f1ea/4745e7244fa446a1bcbe66dfa7a3bcbd/FLAGc428c1356 [2019-09-19 08:51:41,041 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/47853f1ea/4745e7244fa446a1bcbe66dfa7a3bcbd [2019-09-19 08:51:41,051 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-19 08:51:41,052 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-19 08:51:41,053 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-19 08:51:41,053 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-19 08:51:41,057 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-19 08:51:41,057 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.09 08:51:41" (1/1) ... [2019-09-19 08:51:41,060 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4befbbf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.09 08:51:41, skipping insertion in model container [2019-09-19 08:51:41,060 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.09 08:51:41" (1/1) ... [2019-09-19 08:51:41,066 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-19 08:51:41,117 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-19 08:51:41,549 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-19 08:51:41,562 INFO L188 MainTranslator]: Completed pre-run [2019-09-19 08:51:41,656 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-19 08:51:41,700 INFO L192 MainTranslator]: Completed translation [2019-09-19 08:51:41,700 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.09 08:51:41 WrapperNode [2019-09-19 08:51:41,700 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-19 08:51:41,701 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-19 08:51:41,701 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-19 08:51:41,701 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-19 08:51:41,711 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.09 08:51:41" (1/1) ... [2019-09-19 08:51:41,711 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.09 08:51:41" (1/1) ... [2019-09-19 08:51:41,728 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.09 08:51:41" (1/1) ... [2019-09-19 08:51:41,729 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.09 08:51:41" (1/1) ... [2019-09-19 08:51:41,756 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.09 08:51:41" (1/1) ... [2019-09-19 08:51:41,766 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.09 08:51:41" (1/1) ... [2019-09-19 08:51:41,771 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.09 08:51:41" (1/1) ... [2019-09-19 08:51:41,779 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-19 08:51:41,779 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-19 08:51:41,780 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-19 08:51:41,780 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-19 08:51:41,781 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.09 08:51:41" (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 [2019-09-19 08:51:41,842 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-19 08:51:41,843 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-19 08:51:41,843 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2019-09-19 08:51:41,843 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2019-09-19 08:51:41,844 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2019-09-19 08:51:41,844 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2019-09-19 08:51:41,845 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2019-09-19 08:51:41,845 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-19 08:51:41,845 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification2_spec__1 [2019-09-19 08:51:41,845 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification2_spec__2 [2019-09-19 08:51:41,845 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2019-09-19 08:51:41,846 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2019-09-19 08:51:41,846 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2019-09-19 08:51:41,846 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2019-09-19 08:51:41,847 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2019-09-19 08:51:41,847 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2019-09-19 08:51:41,849 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2019-09-19 08:51:41,849 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2019-09-19 08:51:41,849 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__base [2019-09-19 08:51:41,849 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__highWaterSensor [2019-09-19 08:51:41,849 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__lowWaterSensor [2019-09-19 08:51:41,850 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment [2019-09-19 08:51:41,850 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump [2019-09-19 08:51:41,850 INFO L138 BoogieDeclarations]: Found implementation of procedure deactivatePump [2019-09-19 08:51:41,850 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneAlarm [2019-09-19 08:51:41,850 INFO L138 BoogieDeclarations]: Found implementation of procedure isPumpRunning [2019-09-19 08:51:41,850 INFO L138 BoogieDeclarations]: Found implementation of procedure printPump [2019-09-19 08:51:41,851 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterLevel [2019-09-19 08:51:41,851 INFO L138 BoogieDeclarations]: Found implementation of procedure isLowWaterLevel [2019-09-19 08:51:41,851 INFO L138 BoogieDeclarations]: Found implementation of procedure startSystem [2019-09-19 08:51:41,851 INFO L138 BoogieDeclarations]: Found implementation of procedure lowerWaterLevel [2019-09-19 08:51:41,851 INFO L138 BoogieDeclarations]: Found implementation of procedure waterRise [2019-09-19 08:51:41,851 INFO L138 BoogieDeclarations]: Found implementation of procedure changeMethaneLevel [2019-09-19 08:51:41,851 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneLevelCritical [2019-09-19 08:51:41,852 INFO L138 BoogieDeclarations]: Found implementation of procedure printEnvironment [2019-09-19 08:51:41,852 INFO L138 BoogieDeclarations]: Found implementation of procedure getWaterLevel [2019-09-19 08:51:41,852 INFO L138 BoogieDeclarations]: Found implementation of procedure isHighWaterSensorDry [2019-09-19 08:51:41,852 INFO L138 BoogieDeclarations]: Found implementation of procedure isLowWaterSensorDry [2019-09-19 08:51:41,852 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2019-09-19 08:51:41,852 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2019-09-19 08:51:41,853 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2019-09-19 08:51:41,853 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2019-09-19 08:51:41,853 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2019-09-19 08:51:41,853 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-19 08:51:41,853 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-19 08:51:41,853 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2019-09-19 08:51:41,854 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2019-09-19 08:51:41,854 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2019-09-19 08:51:41,854 INFO L130 BoogieDeclarations]: Found specification of procedure printPump [2019-09-19 08:51:41,854 INFO L130 BoogieDeclarations]: Found specification of procedure waterRise [2019-09-19 08:51:41,854 INFO L130 BoogieDeclarations]: Found specification of procedure changeMethaneLevel [2019-09-19 08:51:41,854 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2019-09-19 08:51:41,854 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2019-09-19 08:51:41,855 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification2_spec__1 [2019-09-19 08:51:41,855 INFO L130 BoogieDeclarations]: Found specification of procedure test [2019-09-19 08:51:41,855 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2019-09-19 08:51:41,855 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2019-09-19 08:51:41,855 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2019-09-19 08:51:41,855 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2019-09-19 08:51:41,856 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-19 08:51:41,856 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2019-09-19 08:51:41,856 INFO L130 BoogieDeclarations]: Found specification of procedure isPumpRunning [2019-09-19 08:51:41,856 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneLevelCritical [2019-09-19 08:51:41,856 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification2_spec__2 [2019-09-19 08:51:41,856 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2019-09-19 08:51:41,857 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-09-19 08:51:41,857 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-09-19 08:51:41,857 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2019-09-19 08:51:41,857 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-09-19 08:51:41,857 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-09-19 08:51:41,857 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-09-19 08:51:41,857 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-09-19 08:51:41,858 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2019-09-19 08:51:41,858 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-09-19 08:51:41,858 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2019-09-19 08:51:41,858 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2019-09-19 08:51:41,858 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-09-19 08:51:41,858 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2019-09-19 08:51:41,859 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2019-09-19 08:51:41,859 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-09-19 08:51:41,859 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2019-09-19 08:51:41,859 INFO L130 BoogieDeclarations]: Found specification of procedure startSystem [2019-09-19 08:51:41,859 INFO L130 BoogieDeclarations]: Found specification of procedure lowerWaterLevel [2019-09-19 08:51:41,859 INFO L130 BoogieDeclarations]: Found specification of procedure printEnvironment [2019-09-19 08:51:41,859 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterSensorDry [2019-09-19 08:51:41,860 INFO L130 BoogieDeclarations]: Found specification of procedure isLowWaterSensorDry [2019-09-19 08:51:41,860 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump [2019-09-19 08:51:41,860 INFO L130 BoogieDeclarations]: Found specification of procedure deactivatePump [2019-09-19 08:51:41,860 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment [2019-09-19 08:51:41,860 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__base [2019-09-19 08:51:41,860 INFO L130 BoogieDeclarations]: Found specification of procedure isHighWaterLevel [2019-09-19 08:51:41,861 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__highWaterSensor [2019-09-19 08:51:41,861 INFO L130 BoogieDeclarations]: Found specification of procedure isLowWaterLevel [2019-09-19 08:51:41,861 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__lowWaterSensor [2019-09-19 08:51:41,861 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneAlarm [2019-09-19 08:51:41,861 INFO L130 BoogieDeclarations]: Found specification of procedure getWaterLevel [2019-09-19 08:51:41,861 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2019-09-19 08:51:41,861 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-19 08:51:41,862 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-09-19 08:51:41,862 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-19 08:51:43,423 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-19 08:51:43,424 INFO L283 CfgBuilder]: Removed 5 assume(true) statements. [2019-09-19 08:51:43,425 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.09 08:51:43 BoogieIcfgContainer [2019-09-19 08:51:43,425 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-19 08:51:43,426 INFO L113 PluginConnector]: ------------------------Sifa---------------------------- [2019-09-19 08:51:43,426 INFO L271 PluginConnector]: Initializing Sifa... [2019-09-19 08:51:43,426 INFO L275 PluginConnector]: Sifa initialized [2019-09-19 08:51:43,427 INFO L185 PluginConnector]: Executing the observer SifaObserver from plugin Sifa for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.09 08:51:43" (1/1) ... [2019-09-19 08:51:43,428 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=InterpretCallSummarizer ♦ Xnf Conversion Technique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION ♦ Simplification Technique=SIMPLIFY_DDA ♦ Intern Fluid=SizeLimitFluid [2019-09-19 08:51:43,451 INFO L162 IcfgInterpreter]: Started Sifa with 1 locations of interest [2019-09-19 08:51:43,451 INFO L169 IcfgInterpreter]: Building call graph [2019-09-19 08:51:43,460 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-09-19 08:51:43,469 INFO L179 IcfgInterpreter]: Starting interpretation [2019-09-19 08:51:43,470 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-09-19 08:51:56,047 WARN L191 SmtUtils]: Spent 12.50 s on a formula simplification that was a NOOP. DAG size: 443 [2019-09-19 08:52:06,884 WARN L191 SmtUtils]: Spent 10.83 s on a formula simplification that was a NOOP. DAG size: 443 [2019-09-19 08:52:25,448 WARN L191 SmtUtils]: Spent 11.57 s on a formula simplification that was a NOOP. DAG size: 466 [2019-09-19 08:52:27,118 WARN L191 SmtUtils]: Spent 422.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 129 [2019-09-19 08:52:30,904 WARN L191 SmtUtils]: Spent 3.78 s on a formula simplification. DAG size of input: 474 DAG size of output: 424 [2019-09-19 08:52:30,913 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 434 for LOIs [2019-09-19 08:52:32,527 WARN L191 SmtUtils]: Spent 1.59 s on a formula simplification that was a NOOP. DAG size: 424 [2019-09-19 08:52:34,169 WARN L191 SmtUtils]: Spent 1.64 s on a formula simplification that was a NOOP. DAG size: 424 [2019-09-19 08:52:35,805 WARN L191 SmtUtils]: Spent 1.63 s on a formula simplification that was a NOOP. DAG size: 424 [2019-09-19 08:52:37,381 WARN L191 SmtUtils]: Spent 1.57 s on a formula simplification that was a NOOP. DAG size: 424 [2019-09-19 08:52:39,034 WARN L191 SmtUtils]: Spent 1.65 s on a formula simplification that was a NOOP. DAG size: 428 [2019-09-19 08:52:40,655 WARN L191 SmtUtils]: Spent 1.62 s on a formula simplification that was a NOOP. DAG size: 428 [2019-09-19 08:52:42,310 WARN L191 SmtUtils]: Spent 1.64 s on a formula simplification that was a NOOP. DAG size: 424 [2019-09-19 08:52:43,896 WARN L191 SmtUtils]: Spent 1.58 s on a formula simplification that was a NOOP. DAG size: 424 [2019-09-19 08:52:43,903 INFO L199 IcfgInterpreter]: Interpreting procedure runTest with input of size 434 for LOIs [2019-09-19 08:52:45,545 WARN L191 SmtUtils]: Spent 1.63 s on a formula simplification that was a NOOP. DAG size: 426 [2019-09-19 08:52:47,143 WARN L191 SmtUtils]: Spent 1.60 s on a formula simplification that was a NOOP. DAG size: 426 [2019-09-19 08:52:47,152 INFO L199 IcfgInterpreter]: Interpreting procedure test with input of size 434 for LOIs [2019-09-19 08:52:50,505 WARN L191 SmtUtils]: Spent 3.24 s on a formula simplification. DAG size of input: 433 DAG size of output: 427 [2019-09-19 08:52:52,083 WARN L191 SmtUtils]: Spent 1.58 s on a formula simplification that was a NOOP. DAG size: 427 [2019-09-19 08:53:02,829 WARN L191 SmtUtils]: Spent 10.70 s on a formula simplification. DAG size of input: 454 DAG size of output: 452 [2019-09-19 08:53:08,073 WARN L191 SmtUtils]: Spent 5.24 s on a formula simplification that was a NOOP. DAG size: 452 [2019-09-19 08:53:18,683 WARN L191 SmtUtils]: Spent 10.61 s on a formula simplification. DAG size of input: 454 DAG size of output: 452 [2019-09-19 08:53:23,879 WARN L191 SmtUtils]: Spent 5.19 s on a formula simplification that was a NOOP. DAG size: 452 [2019-09-19 08:53:34,661 WARN L191 SmtUtils]: Spent 10.78 s on a formula simplification. DAG size of input: 454 DAG size of output: 452 [2019-09-19 08:53:39,906 WARN L191 SmtUtils]: Spent 5.24 s on a formula simplification that was a NOOP. DAG size: 452 [2019-09-19 08:53:49,967 WARN L191 SmtUtils]: Spent 10.02 s on a formula simplification. DAG size of input: 435 DAG size of output: 430 [2019-09-19 08:53:54,946 WARN L191 SmtUtils]: Spent 4.98 s on a formula simplification that was a NOOP. DAG size: 430 [2019-09-19 08:54:14,123 WARN L191 SmtUtils]: Spent 19.16 s on a formula simplification. DAG size of input: 473 DAG size of output: 468 [2019-09-19 08:54:22,046 WARN L191 SmtUtils]: Spent 7.92 s on a formula simplification that was a NOOP. DAG size: 468 [2019-09-19 08:54:30,226 WARN L191 SmtUtils]: Spent 8.12 s on a formula simplification that was a NOOP. DAG size: 435 [2019-09-19 08:54:38,370 WARN L191 SmtUtils]: Spent 8.14 s on a formula simplification that was a NOOP. DAG size: 435 [2019-09-19 08:55:13,934 WARN L191 SmtUtils]: Spent 35.53 s on a formula simplification. DAG size of input: 506 DAG size of output: 493 [2019-09-19 08:55:29,160 WARN L191 SmtUtils]: Spent 15.22 s on a formula simplification that was a NOOP. DAG size: 493 [2019-09-19 08:55:30,858 WARN L191 SmtUtils]: Spent 1.63 s on a formula simplification. DAG size of input: 457 DAG size of output: 1 [2019-09-19 08:55:43,093 WARN L191 SmtUtils]: Spent 12.23 s on a formula simplification. DAG size of input: 453 DAG size of output: 443 [2019-09-19 08:55:49,149 WARN L191 SmtUtils]: Spent 6.05 s on a formula simplification that was a NOOP. DAG size: 443 [2019-09-19 08:56:02,194 WARN L191 SmtUtils]: Spent 12.85 s on a formula simplification. DAG size of input: 447 DAG size of output: 445 [2019-09-19 08:56:08,608 WARN L191 SmtUtils]: Spent 6.41 s on a formula simplification that was a NOOP. DAG size: 445 [2019-09-19 08:56:21,671 WARN L191 SmtUtils]: Spent 13.05 s on a formula simplification. DAG size of input: 461 DAG size of output: 454 [2019-09-19 08:56:28,174 WARN L191 SmtUtils]: Spent 6.50 s on a formula simplification that was a NOOP. DAG size: 454 [2019-09-19 08:56:42,131 WARN L191 SmtUtils]: Spent 13.92 s on a formula simplification. DAG size of input: 441 DAG size of output: 432 [2019-09-19 08:56:46,807 WARN L191 SmtUtils]: Spent 4.68 s on a formula simplification that was a NOOP. DAG size: 432 [2019-09-19 08:56:56,211 WARN L191 SmtUtils]: Spent 9.39 s on a formula simplification. DAG size of input: 438 DAG size of output: 430 [2019-09-19 08:57:00,831 WARN L191 SmtUtils]: Spent 4.62 s on a formula simplification that was a NOOP. DAG size: 430 [2019-09-19 08:57:20,063 WARN L191 SmtUtils]: Spent 19.23 s on a formula simplification. DAG size of input: 463 DAG size of output: 446 [2019-09-19 08:57:25,854 WARN L191 SmtUtils]: Spent 5.79 s on a formula simplification that was a NOOP. DAG size: 446 [2019-09-19 08:57:31,722 WARN L191 SmtUtils]: Spent 5.84 s on a formula simplification that was a NOOP. DAG size: 446 [2019-09-19 08:57:37,529 WARN L191 SmtUtils]: Spent 5.81 s on a formula simplification that was a NOOP. DAG size: 446 [2019-09-19 08:57:43,324 WARN L191 SmtUtils]: Spent 5.79 s on a formula simplification that was a NOOP. DAG size: 446 [2019-09-19 08:57:49,141 WARN L191 SmtUtils]: Spent 5.81 s on a formula simplification that was a NOOP. DAG size: 446 [2019-09-19 08:58:01,679 WARN L191 SmtUtils]: Spent 12.53 s on a formula simplification. DAG size of input: 445 DAG size of output: 443 [2019-09-19 08:58:08,153 WARN L191 SmtUtils]: Spent 6.47 s on a formula simplification that was a NOOP. DAG size: 443 [2019-09-19 08:58:21,138 WARN L191 SmtUtils]: Spent 12.98 s on a formula simplification. DAG size of input: 445 DAG size of output: 443 [2019-09-19 08:58:27,510 WARN L191 SmtUtils]: Spent 6.37 s on a formula simplification that was a NOOP. DAG size: 443 [2019-09-19 08:58:50,333 WARN L191 SmtUtils]: Spent 22.82 s on a formula simplification. DAG size of input: 466 DAG size of output: 447 [2019-09-19 08:58:56,772 WARN L191 SmtUtils]: Spent 6.44 s on a formula simplification that was a NOOP. DAG size: 447 [2019-09-19 08:59:03,143 WARN L191 SmtUtils]: Spent 6.36 s on a formula simplification that was a NOOP. DAG size: 445 [2019-09-19 08:59:09,538 WARN L191 SmtUtils]: Spent 6.39 s on a formula simplification that was a NOOP. DAG size: 445 [2019-09-19 08:59:17,993 WARN L191 SmtUtils]: Spent 8.41 s on a formula simplification. DAG size of input: 457 DAG size of output: 439 [2019-09-19 08:59:20,416 WARN L191 SmtUtils]: Spent 2.42 s on a formula simplification that was a NOOP. DAG size: 439 [2019-09-19 08:59:29,359 WARN L191 SmtUtils]: Spent 8.86 s on a formula simplification. DAG size of input: 465 DAG size of output: 433 [2019-09-19 08:59:30,545 WARN L191 SmtUtils]: Spent 1.18 s on a formula simplification that was a NOOP. DAG size: 433 [2019-09-19 08:59:40,469 WARN L191 SmtUtils]: Spent 9.91 s on a formula simplification. DAG size of input: 469 DAG size of output: 441 [2019-09-19 08:59:44,672 WARN L191 SmtUtils]: Spent 4.20 s on a formula simplification that was a NOOP. DAG size: 441 [2019-09-19 08:59:58,950 WARN L191 SmtUtils]: Spent 14.27 s on a formula simplification. DAG size of input: 463 DAG size of output: 453 [2019-09-19 09:00:05,415 WARN L191 SmtUtils]: Spent 6.42 s on a formula simplification that was a NOOP. DAG size: 445 [2019-09-19 09:00:11,801 WARN L191 SmtUtils]: Spent 6.38 s on a formula simplification that was a NOOP. DAG size: 445 [2019-09-19 09:00:20,892 WARN L191 SmtUtils]: Spent 8.94 s on a formula simplification. DAG size of input: 463 DAG size of output: 449 [2019-09-19 09:00:23,831 WARN L191 SmtUtils]: Spent 2.94 s on a formula simplification that was a NOOP. DAG size: 449 [2019-09-19 09:00:58,828 WARN L191 SmtUtils]: Spent 34.95 s on a formula simplification. DAG size of input: 548 DAG size of output: 524 [2019-09-19 09:01:08,947 WARN L191 SmtUtils]: Spent 10.12 s on a formula simplification that was a NOOP. DAG size: 524 [2019-09-19 09:01:18,508 WARN L191 SmtUtils]: Spent 9.49 s on a formula simplification. DAG size of input: 466 DAG size of output: 446 [2019-09-19 09:01:20,560 WARN L191 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 446 [2019-09-19 09:01:37,757 WARN L191 SmtUtils]: Spent 17.18 s on a formula simplification. DAG size of input: 529 DAG size of output: 515 [2019-09-19 09:01:44,389 WARN L191 SmtUtils]: Spent 6.63 s on a formula simplification that was a NOOP. DAG size: 515 [2019-09-19 09:01:57,996 WARN L191 SmtUtils]: Spent 13.60 s on a formula simplification. DAG size of input: 555 DAG size of output: 513 [2019-09-19 09:02:04,650 WARN L191 SmtUtils]: Spent 6.65 s on a formula simplification that was a NOOP. DAG size: 513 [2019-09-19 09:02:21,095 WARN L191 SmtUtils]: Spent 16.44 s on a formula simplification. DAG size of input: 569 DAG size of output: 513 [2019-09-19 09:02:27,795 WARN L191 SmtUtils]: Spent 6.70 s on a formula simplification that was a NOOP. DAG size: 513 [2019-09-19 09:02:41,388 WARN L191 SmtUtils]: Spent 13.56 s on a formula simplification that was a NOOP. DAG size: 531 [2019-09-19 09:02:42,109 WARN L191 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 26 [2019-09-19 09:02:42,512 WARN L191 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 30 [2019-09-19 09:02:42,906 WARN L191 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 21 [2019-09-19 09:02:43,161 WARN L191 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2019-09-19 09:02:43,275 WARN L191 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 33 [2019-09-19 09:02:44,049 WARN L191 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 38 [2019-09-19 09:02:44,227 WARN L191 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 38 [2019-09-19 09:02:44,829 WARN L191 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 26 [2019-09-19 09:02:45,126 WARN L191 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 30 [2019-09-19 09:02:45,732 WARN L191 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2019-09-19 09:02:45,846 WARN L191 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 33 [2019-09-19 09:02:46,262 WARN L191 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 29 [2019-09-19 09:02:46,922 WARN L191 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 26 [2019-09-19 09:02:47,225 WARN L191 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 31 [2019-09-19 09:02:47,903 WARN L191 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 38 [2019-09-19 09:02:48,278 WARN L191 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 30 [2019-09-19 09:02:48,445 WARN L191 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2019-09-19 09:02:48,595 WARN L191 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 32 [2019-09-19 09:02:59,081 WARN L191 SmtUtils]: Spent 10.13 s on a formula simplification. DAG size of input: 435 DAG size of output: 430 [2019-09-19 09:03:04,156 WARN L191 SmtUtils]: Spent 5.07 s on a formula simplification that was a NOOP. DAG size: 430 [2019-09-19 09:03:22,396 WARN L191 SmtUtils]: Spent 18.23 s on a formula simplification. DAG size of input: 470 DAG size of output: 466 [2019-09-19 09:03:30,692 WARN L191 SmtUtils]: Spent 8.29 s on a formula simplification that was a NOOP. DAG size: 466 [2019-09-19 09:03:37,698 WARN L191 SmtUtils]: Spent 6.97 s on a formula simplification that was a NOOP. DAG size: 435 [2019-09-19 09:03:44,597 WARN L191 SmtUtils]: Spent 6.90 s on a formula simplification that was a NOOP. DAG size: 435 [2019-09-19 09:04:13,373 WARN L191 SmtUtils]: Spent 28.76 s on a formula simplification. DAG size of input: 496 DAG size of output: 489 [2019-09-19 09:04:27,232 WARN L191 SmtUtils]: Spent 13.86 s on a formula simplification that was a NOOP. DAG size: 489 [2019-09-19 09:04:28,397 WARN L191 SmtUtils]: Spent 1.11 s on a formula simplification. DAG size of input: 452 DAG size of output: 1 [2019-09-19 09:04:42,645 WARN L191 SmtUtils]: Spent 14.25 s on a formula simplification. DAG size of input: 448 DAG size of output: 440 [2019-09-19 09:04:49,886 WARN L191 SmtUtils]: Spent 7.24 s on a formula simplification that was a NOOP. DAG size: 440