/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/product-lines/minepump_spec1_product24.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 16:42:57,578 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 16:42:57,583 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 16:42:57,632 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 16:42:57,634 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 16:42:57,645 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 16:42:57,647 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 16:42:57,650 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 16:42:57,653 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 16:42:57,655 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 16:42:57,656 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 16:42:57,659 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 16:42:57,659 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 16:42:57,664 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 16:42:57,667 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 16:42:57,669 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 16:42:57,670 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 16:42:57,672 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 16:42:57,674 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 16:42:57,680 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 16:42:57,681 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 16:42:57,688 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 16:42:57,689 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 16:42:57,690 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 16:42:57,694 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 16:42:57,694 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 16:42:57,694 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 16:42:57,698 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 16:42:57,698 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 16:42:57,700 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 16:42:57,700 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 16:42:57,701 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 16:42:57,702 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 16:42:57,703 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 16:42:57,704 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 16:42:57,704 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 16:42:57,705 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 16:42:57,705 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 16:42:57,705 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 16:42:57,706 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 16:42:57,708 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 16:42:57,709 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-24 16:42:57,757 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 16:42:57,758 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 16:42:57,761 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 16:42:57,761 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 16:42:57,761 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 16:42:57,761 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 16:42:57,762 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 16:42:57,762 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 16:42:57,762 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 16:42:57,762 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 16:42:57,763 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 16:42:57,764 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 16:42:57,764 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 16:42:57,764 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 16:42:57,764 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 16:42:57,765 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 16:42:57,765 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 16:42:57,765 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 16:42:57,765 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 16:42:57,765 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 16:42:57,766 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 16:42:57,766 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 16:42:57,766 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 16:42:57,766 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 16:42:57,767 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 16:42:57,767 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 16:42:57,767 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 16:42:57,767 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 16:42:57,767 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 16:42:57,768 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false 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.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;log-additional-information=true; [2020-09-24 16:42:58,210 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 16:42:58,234 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 16:42:58,241 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 16:42:58,243 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 16:42:58,243 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 16:42:58,245 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/minepump_spec1_product24.cil.c [2020-09-24 16:42:58,340 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/911830e90/e6c29d79818b4b27a7ce02730ea3d83b/FLAG25a9edd06 [2020-09-24 16:42:58,928 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 16:42:58,929 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/product-lines/minepump_spec1_product24.cil.c [2020-09-24 16:42:58,945 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/911830e90/e6c29d79818b4b27a7ce02730ea3d83b/FLAG25a9edd06 [2020-09-24 16:42:59,204 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/911830e90/e6c29d79818b4b27a7ce02730ea3d83b [2020-09-24 16:42:59,217 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 16:42:59,222 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 16:42:59,223 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 16:42:59,223 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 16:42:59,227 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 16:42:59,228 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 04:42:59" (1/1) ... [2020-09-24 16:42:59,231 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@53d96e6a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:42:59, skipping insertion in model container [2020-09-24 16:42:59,232 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 04:42:59" (1/1) ... [2020-09-24 16:42:59,239 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 16:42:59,302 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 16:42:59,674 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 16:42:59,691 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 16:42:59,901 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 16:42:59,939 INFO L208 MainTranslator]: Completed translation [2020-09-24 16:42:59,940 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:42:59 WrapperNode [2020-09-24 16:42:59,940 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 16:42:59,941 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 16:42:59,941 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 16:42:59,941 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 16:42:59,962 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:42:59" (1/1) ... [2020-09-24 16:42:59,963 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:42:59" (1/1) ... [2020-09-24 16:42:59,986 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:42:59" (1/1) ... [2020-09-24 16:42:59,987 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:42:59" (1/1) ... [2020-09-24 16:43:00,017 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:42:59" (1/1) ... [2020-09-24 16:43:00,029 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:42:59" (1/1) ... [2020-09-24 16:43:00,034 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:42:59" (1/1) ... [2020-09-24 16:43:00,042 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 16:43:00,043 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 16:43:00,043 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 16:43:00,044 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 16:43:00,045 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:42:59" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-24 16:43:00,137 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 16:43:00,137 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 16:43:00,138 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2020-09-24 16:43:00,138 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2020-09-24 16:43:00,138 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2020-09-24 16:43:00,138 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2020-09-24 16:43:00,138 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2020-09-24 16:43:00,139 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2020-09-24 16:43:00,139 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2020-09-24 16:43:00,139 INFO L138 BoogieDeclarations]: Found implementation of procedure lowerWaterLevel [2020-09-24 16:43:00,139 INFO L138 BoogieDeclarations]: Found implementation of procedure waterRise [2020-09-24 16:43:00,139 INFO L138 BoogieDeclarations]: Found implementation of procedure changeMethaneLevel [2020-09-24 16:43:00,140 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneLevelCritical [2020-09-24 16:43:00,140 INFO L138 BoogieDeclarations]: Found implementation of procedure printEnvironment [2020-09-24 16:43:00,140 INFO L138 BoogieDeclarations]: Found implementation of procedure getWaterLevel [2020-09-24 16:43:00,140 INFO L138 BoogieDeclarations]: Found implementation of procedure isLowWaterSensorDry [2020-09-24 16:43:00,141 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__1 [2020-09-24 16:43:00,141 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2020-09-24 16:43:00,141 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2020-09-24 16:43:00,141 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2020-09-24 16:43:00,141 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2020-09-24 16:43:00,142 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2020-09-24 16:43:00,142 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2020-09-24 16:43:00,142 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 16:43:00,142 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2020-09-24 16:43:00,142 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__base [2020-09-24 16:43:00,142 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__lowWaterSensor [2020-09-24 16:43:00,143 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment [2020-09-24 16:43:00,143 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump [2020-09-24 16:43:00,143 INFO L138 BoogieDeclarations]: Found implementation of procedure deactivatePump [2020-09-24 16:43:00,143 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneAlarm [2020-09-24 16:43:00,143 INFO L138 BoogieDeclarations]: Found implementation of procedure isPumpRunning [2020-09-24 16:43:00,144 INFO L138 BoogieDeclarations]: Found implementation of procedure printPump [2020-09-24 16:43:00,144 INFO L138 BoogieDeclarations]: Found implementation of procedure isLowWaterLevel [2020-09-24 16:43:00,144 INFO L138 BoogieDeclarations]: Found implementation of procedure stopSystem [2020-09-24 16:43:00,144 INFO L138 BoogieDeclarations]: Found implementation of procedure startSystem [2020-09-24 16:43:00,144 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2020-09-24 16:43:00,144 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2020-09-24 16:43:00,144 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2020-09-24 16:43:00,145 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2020-09-24 16:43:00,145 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 16:43:00,145 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-24 16:43:00,145 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2020-09-24 16:43:00,145 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-09-24 16:43:00,145 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-09-24 16:43:00,146 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-09-24 16:43:00,146 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2020-09-24 16:43:00,146 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-09-24 16:43:00,146 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-09-24 16:43:00,146 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-24 16:43:00,146 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-09-24 16:43:00,147 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2020-09-24 16:43:00,147 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-24 16:43:00,147 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2020-09-24 16:43:00,147 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2020-09-24 16:43:00,147 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-24 16:43:00,148 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2020-09-24 16:43:00,148 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2020-09-24 16:43:00,148 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-24 16:43:00,148 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2020-09-24 16:43:00,148 INFO L130 BoogieDeclarations]: Found specification of procedure lowerWaterLevel [2020-09-24 16:43:00,148 INFO L130 BoogieDeclarations]: Found specification of procedure waterRise [2020-09-24 16:43:00,148 INFO L130 BoogieDeclarations]: Found specification of procedure changeMethaneLevel [2020-09-24 16:43:00,149 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneLevelCritical [2020-09-24 16:43:00,149 INFO L130 BoogieDeclarations]: Found specification of procedure getWaterLevel [2020-09-24 16:43:00,149 INFO L130 BoogieDeclarations]: Found specification of procedure printEnvironment [2020-09-24 16:43:00,149 INFO L130 BoogieDeclarations]: Found specification of procedure isLowWaterSensorDry [2020-09-24 16:43:00,149 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2020-09-24 16:43:00,149 INFO L130 BoogieDeclarations]: Found specification of procedure isPumpRunning [2020-09-24 16:43:00,150 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__1 [2020-09-24 16:43:00,150 INFO L130 BoogieDeclarations]: Found specification of procedure startSystem [2020-09-24 16:43:00,150 INFO L130 BoogieDeclarations]: Found specification of procedure stopSystem [2020-09-24 16:43:00,150 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2020-09-24 16:43:00,150 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2020-09-24 16:43:00,150 INFO L130 BoogieDeclarations]: Found specification of procedure test [2020-09-24 16:43:00,151 INFO L130 BoogieDeclarations]: Found specification of procedure printPump [2020-09-24 16:43:00,151 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2020-09-24 16:43:00,151 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2020-09-24 16:43:00,151 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2020-09-24 16:43:00,151 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2020-09-24 16:43:00,151 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2020-09-24 16:43:00,152 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2020-09-24 16:43:00,152 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 16:43:00,152 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump [2020-09-24 16:43:00,152 INFO L130 BoogieDeclarations]: Found specification of procedure deactivatePump [2020-09-24 16:43:00,152 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment [2020-09-24 16:43:00,152 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__base [2020-09-24 16:43:00,153 INFO L130 BoogieDeclarations]: Found specification of procedure isLowWaterLevel [2020-09-24 16:43:00,153 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__lowWaterSensor [2020-09-24 16:43:00,153 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneAlarm [2020-09-24 16:43:00,153 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2020-09-24 16:43:00,153 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 16:43:00,153 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-09-24 16:43:00,154 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 16:43:01,317 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 16:43:01,318 INFO L295 CfgBuilder]: Removed 5 assume(true) statements. [2020-09-24 16:43:01,325 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 04:43:01 BoogieIcfgContainer [2020-09-24 16:43:01,326 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 16:43:01,327 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 16:43:01,327 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 16:43:01,332 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 16:43:01,333 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 04:42:59" (1/3) ... [2020-09-24 16:43:01,336 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@734224f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 04:43:01, skipping insertion in model container [2020-09-24 16:43:01,336 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:42:59" (2/3) ... [2020-09-24 16:43:01,336 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@734224f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 04:43:01, skipping insertion in model container [2020-09-24 16:43:01,337 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 04:43:01" (3/3) ... [2020-09-24 16:43:01,340 INFO L109 eAbstractionObserver]: Analyzing ICFG minepump_spec1_product24.cil.c [2020-09-24 16:43:01,352 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 16:43:01,367 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 16:43:01,390 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 16:43:01,423 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 16:43:01,423 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 16:43:01,424 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 16:43:01,424 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 16:43:01,424 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 16:43:01,424 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 16:43:01,424 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 16:43:01,424 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 16:43:01,453 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states. [2020-09-24 16:43:01,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2020-09-24 16:43:01,471 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:43:01,473 INFO L422 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] [2020-09-24 16:43:01,474 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:43:01,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:43:01,482 INFO L82 PathProgramCache]: Analyzing trace with hash 779831521, now seen corresponding path program 1 times [2020-09-24 16:43:01,494 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:43:01,494 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2024026289] [2020-09-24 16:43:01,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:43:01,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:43:02,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 16:43:02,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 16:43:03,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 16:43:04,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 16:43:10,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 16:43:18,864 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:43:18,865 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 173 [2020-09-24 16:43:18,865 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-24 16:43:18,865 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16999 [2020-09-24 16:43:18,868 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 16:43:18,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-24 16:43:18,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 82 [2020-09-24 16:43:18,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-09-24 16:43:18,869 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-24 16:43:19,307 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-09-24 16:43:19,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:43:19,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:43:19,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 16:43:19,601 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:43:19,601 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-09-24 16:43:19,601 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:43:19,602 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 250 [2020-09-24 16:43:19,602 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 16:43:19,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 16:43:19,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:43:19,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-09-24 16:43:19,603 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:43:19,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-09-24 16:43:19,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:43:19,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 16:43:19,706 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:43:19,707 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 16:43:19,707 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:43:19,707 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-24 16:43:19,708 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 16:43:19,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 16:43:19,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:43:19,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-09-24 16:43:19,709 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:43:19,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2020-09-24 16:43:19,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:43:19,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 16:43:19,721 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:43:19,722 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 16:43:19,722 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:43:19,722 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 16:43:19,722 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 16:43:19,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 16:43:19,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:43:19,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-09-24 16:43:19,723 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 16:43:19,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2020-09-24 16:43:19,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:43:19,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 16:43:19,738 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:43:19,738 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 16:43:19,738 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:43:19,739 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-24 16:43:19,739 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 16:43:19,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 16:43:19,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:43:19,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-24 16:43:19,740 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 16:43:19,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2020-09-24 16:43:19,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:43:19,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 16:43:19,747 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:43:19,747 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 16:43:19,747 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:43:19,748 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-24 16:43:19,748 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 16:43:19,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 16:43:19,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:43:19,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-09-24 16:43:19,749 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:43:19,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2020-09-24 16:43:19,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:43:19,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 16:43:19,756 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:43:19,757 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 16:43:19,757 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:43:19,757 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 16:43:19,757 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 16:43:19,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:43:19,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 8 [2020-09-24 16:43:19,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:43:19,758 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:43:19,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2020-09-24 16:43:19,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:43:19,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 16:43:19,764 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:43:19,764 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 16:43:19,764 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:43:19,764 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 16:43:19,765 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 16:43:19,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:43:19,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 8 [2020-09-24 16:43:19,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:43:19,765 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:43:19,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:43:19,801 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2024026289] [2020-09-24 16:43:19,803 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 16:43:19,804 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-24 16:43:19,805 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237601684] [2020-09-24 16:43:19,815 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 16:43:19,816 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:43:19,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 16:43:19,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-24 16:43:19,839 INFO L87 Difference]: Start difference. First operand 305 states. Second operand 5 states. [2020-09-24 16:43:20,449 WARN L193 SmtUtils]: Spent 281.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-09-24 16:43:21,346 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-09-24 16:43:23,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:43:23,823 INFO L93 Difference]: Finished difference Result 767 states and 963 transitions. [2020-09-24 16:43:23,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-24 16:43:23,826 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 142 [2020-09-24 16:43:23,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:43:23,850 INFO L225 Difference]: With dead ends: 767 [2020-09-24 16:43:23,850 INFO L226 Difference]: Without dead ends: 559 [2020-09-24 16:43:23,856 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-09-24 16:43:23,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2020-09-24 16:43:24,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 468. [2020-09-24 16:43:24,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 468 states. [2020-09-24 16:43:24,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 468 states to 468 states and 535 transitions. [2020-09-24 16:43:24,022 INFO L78 Accepts]: Start accepts. Automaton has 468 states and 535 transitions. Word has length 142 [2020-09-24 16:43:24,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:43:24,024 INFO L479 AbstractCegarLoop]: Abstraction has 468 states and 535 transitions. [2020-09-24 16:43:24,024 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 16:43:24,024 INFO L276 IsEmpty]: Start isEmpty. Operand 468 states and 535 transitions. [2020-09-24 16:43:24,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2020-09-24 16:43:24,030 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:43:24,030 INFO L422 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] [2020-09-24 16:43:24,031 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 16:43:24,031 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:43:24,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:43:24,032 INFO L82 PathProgramCache]: Analyzing trace with hash -689921157, now seen corresponding path program 1 times [2020-09-24 16:43:24,032 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:43:24,032 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1197150852] [2020-09-24 16:43:24,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:43:24,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:43:24,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 16:43:24,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 16:43:25,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 16:43:25,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 16:43:25,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 16:43:30,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 16:43:47,867 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:43:47,868 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 193 [2020-09-24 16:43:47,868 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-24 16:43:47,868 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23783 [2020-09-24 16:43:47,868 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 16:43:47,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-09-24 16:43:47,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 81 [2020-09-24 16:43:47,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 108 [2020-09-24 16:43:47,869 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:43:48,253 WARN L193 SmtUtils]: Spent 270.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-09-24 16:43:48,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:43:48,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:43:48,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 16:43:48,468 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:43:48,468 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-09-24 16:43:48,469 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:43:48,469 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 176 [2020-09-24 16:43:48,469 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 16:43:48,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 16:43:48,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:43:48,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-09-24 16:43:48,470 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:43:48,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-09-24 16:43:48,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:43:48,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 16:43:48,511 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:43:48,511 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 16:43:48,511 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:43:48,512 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 16:43:48,512 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 16:43:48,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 16:43:48,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:43:48,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-09-24 16:43:48,513 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:43:48,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2020-09-24 16:43:48,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:43:48,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 16:43:48,518 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:43:48,519 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 16:43:48,519 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:43:48,519 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-24 16:43:48,519 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 16:43:48,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 16:43:48,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:43:48,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-09-24 16:43:48,520 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:43:48,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2020-09-24 16:43:48,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:43:48,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 16:43:48,530 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:43:48,530 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 16:43:48,530 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:43:48,531 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-24 16:43:48,531 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 16:43:48,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 16:43:48,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:43:48,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-24 16:43:48,532 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 16:43:48,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2020-09-24 16:43:48,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:43:48,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 16:43:48,540 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:43:48,540 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 16:43:48,541 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:43:48,541 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-24 16:43:48,541 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 16:43:48,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 16:43:48,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:43:48,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-09-24 16:43:48,543 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 16:43:48,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-09-24 16:43:48,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:43:48,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 16:43:48,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 16:43:48,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 16:43:48,596 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:43:48,596 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-09-24 16:43:48,596 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 16:43:48,597 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-09-24 16:43:48,597 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 16:43:48,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 16:43:48,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:43:48,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-24 16:43:48,598 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 16:43:48,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-24 16:43:48,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:43:48,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 16:43:48,618 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:43:48,618 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-24 16:43:48,618 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:43:48,619 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 16:43:48,619 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 16:43:48,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 16:43:48,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:43:48,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-09-24 16:43:48,620 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:43:48,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-24 16:43:48,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:43:48,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 16:43:48,628 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:43:48,628 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 16:43:48,628 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:43:48,629 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-24 16:43:48,629 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 16:43:48,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 16:43:48,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:43:48,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-09-24 16:43:48,631 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 16:43:48,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2020-09-24 16:43:48,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:43:48,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 16:43:48,639 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:43:48,645 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 16:43:48,645 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:43:48,646 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-24 16:43:48,646 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 16:43:48,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 16:43:48,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:43:48,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-24 16:43:48,647 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:43:48,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2020-09-24 16:43:48,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:43:48,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 16:43:48,667 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:43:48,667 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 16:43:48,668 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:43:48,668 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-09-24 16:43:48,669 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 16:43:48,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 16:43:48,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:43:48,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-24 16:43:48,670 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 16:43:48,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:43:48,774 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1197150852] [2020-09-24 16:43:48,774 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 16:43:48,774 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-09-24 16:43:48,774 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347537636] [2020-09-24 16:43:48,778 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-24 16:43:48,779 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:43:48,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-24 16:43:48,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-09-24 16:43:48,779 INFO L87 Difference]: Start difference. First operand 468 states and 535 transitions. Second operand 9 states. [2020-09-24 16:43:49,244 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-09-24 16:43:50,485 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-09-24 16:43:51,093 WARN L193 SmtUtils]: Spent 569.00 ms on a formula simplification. DAG size of input: 192 DAG size of output: 190 [2020-09-24 16:43:51,422 WARN L193 SmtUtils]: Spent 275.00 ms on a formula simplification that was a NOOP. DAG size: 188