/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/SifaCInline.xml -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -i ../../../trunk/examples/svcomp/product-lines/minepump_spec1_product32.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-24 17:47:38,687 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-24 17:47:38,690 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-24 17:47:38,710 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-24 17:47:38,710 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-24 17:47:38,712 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-24 17:47:38,714 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-24 17:47:38,726 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-24 17:47:38,728 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-24 17:47:38,729 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-24 17:47:38,732 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-24 17:47:38,734 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-24 17:47:38,734 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-24 17:47:38,737 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-24 17:47:38,739 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-24 17:47:38,740 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-24 17:47:38,740 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-24 17:47:38,743 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-24 17:47:38,744 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-24 17:47:38,749 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-24 17:47:38,753 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-24 17:47:38,755 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-24 17:47:38,756 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-24 17:47:38,757 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-24 17:47:38,760 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-24 17:47:38,760 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-24 17:47:38,760 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-24 17:47:38,762 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-24 17:47:38,763 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-24 17:47:38,764 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-24 17:47:38,765 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-24 17:47:38,766 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-24 17:47:38,767 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-24 17:47:38,768 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-24 17:47:38,770 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-24 17:47:38,770 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-24 17:47:38,770 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-24 17:47:38,771 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-24 17:47:38,771 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-24 17:47:38,774 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-24 17:47:38,775 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-24 17:47:38,776 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2019-11-24 17:47:38,796 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-24 17:47:38,797 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-24 17:47:38,797 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-24 17:47:38,798 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-24 17:47:38,798 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-24 17:47:38,798 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-24 17:47:38,798 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-24 17:47:38,798 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-24 17:47:38,798 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-24 17:47:38,799 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-24 17:47:38,799 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-24 17:47:38,799 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-24 17:47:38,799 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-24 17:47:38,800 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-24 17:47:38,800 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-24 17:47:38,800 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-24 17:47:38,801 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-24 17:47:38,801 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-24 17:47:38,801 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-24 17:47:38,801 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-24 17:47:38,801 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-24 17:47:38,802 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-24 17:47:38,802 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-24 17:47:38,802 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-24 17:47:38,802 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-24 17:47:38,802 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-24 17:47:38,803 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-24 17:47:38,803 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-24 17:47:38,803 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-24 17:47:38,803 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-24 17:47:38,803 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-24 17:47:38,804 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-24 17:47:38,805 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-24 17:47:38,805 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-24 17:47:38,805 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-24 17:47:38,806 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-24 17:47:38,806 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-24 17:47:38,806 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-24 17:47:39,103 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-24 17:47:39,118 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-24 17:47:39,120 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-24 17:47:39,121 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-24 17:47:39,122 INFO L275 PluginConnector]: CDTParser initialized [2019-11-24 17:47:39,122 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/minepump_spec1_product32.cil.c [2019-11-24 17:47:39,193 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9ea7fb531/a88de88e41494b48bc658e76c4de20e8/FLAG492691926 [2019-11-24 17:47:39,749 INFO L306 CDTParser]: Found 1 translation units. [2019-11-24 17:47:39,750 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/minepump_spec1_product32.cil.c [2019-11-24 17:47:39,763 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9ea7fb531/a88de88e41494b48bc658e76c4de20e8/FLAG492691926 [2019-11-24 17:47:40,025 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9ea7fb531/a88de88e41494b48bc658e76c4de20e8 [2019-11-24 17:47:40,034 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-24 17:47:40,035 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-24 17:47:40,036 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-24 17:47:40,036 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-24 17:47:40,040 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-24 17:47:40,041 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 05:47:40" (1/1) ... [2019-11-24 17:47:40,044 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@734ee26 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:47:40, skipping insertion in model container [2019-11-24 17:47:40,044 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 05:47:40" (1/1) ... [2019-11-24 17:47:40,051 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-24 17:47:40,109 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-24 17:47:40,510 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 17:47:40,536 INFO L203 MainTranslator]: Completed pre-run [2019-11-24 17:47:40,629 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 17:47:40,671 INFO L208 MainTranslator]: Completed translation [2019-11-24 17:47:40,672 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:47:40 WrapperNode [2019-11-24 17:47:40,672 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-24 17:47:40,672 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-24 17:47:40,672 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-24 17:47:40,672 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-24 17:47:40,679 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:47:40" (1/1) ... [2019-11-24 17:47:40,698 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:47:40" (1/1) ... [2019-11-24 17:47:40,742 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-24 17:47:40,742 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-24 17:47:40,742 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-24 17:47:40,742 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-24 17:47:40,750 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:47:40" (1/1) ... [2019-11-24 17:47:40,750 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:47:40" (1/1) ... [2019-11-24 17:47:40,755 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:47:40" (1/1) ... [2019-11-24 17:47:40,756 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:47:40" (1/1) ... [2019-11-24 17:47:40,768 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:47:40" (1/1) ... [2019-11-24 17:47:40,777 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:47:40" (1/1) ... [2019-11-24 17:47:40,781 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:47:40" (1/1) ... [2019-11-24 17:47:40,786 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-24 17:47:40,786 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-24 17:47:40,787 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-24 17:47:40,787 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-24 17:47:40,788 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:47:40" (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 [2019-11-24 17:47:40,845 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-24 17:47:40,845 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-11-24 17:47:40,845 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-24 17:47:40,845 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-24 17:47:42,851 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-24 17:47:42,851 INFO L284 CfgBuilder]: Removed 162 assume(true) statements. [2019-11-24 17:47:42,853 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 05:47:42 BoogieIcfgContainer [2019-11-24 17:47:42,853 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-24 17:47:42,854 INFO L113 PluginConnector]: ------------------------Sifa---------------------------- [2019-11-24 17:47:42,854 INFO L271 PluginConnector]: Initializing Sifa... [2019-11-24 17:47:42,854 INFO L275 PluginConnector]: Sifa initialized [2019-11-24 17:47:42,855 INFO L185 PluginConnector]: Executing the observer SifaObserver from plugin Sifa for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 05:47:42" (1/1) ... [2019-11-24 17:47:42,856 INFO L79 SifaObserver]: LogSizeWrapperFluid Intern Fluid=SizeLimitFluid ♦ Abstract Domain=CompoundDomain ♦ Fluid=SizeLimitFluid ♦ Max. Parallel Explicit Values=2 ♦ Max. Parallel Intervals=2 ♦ Loop Summarizer=FixpointLoopSummarizer ♦ CompoundDomain Intern Domains=ExplicitValueDomain;IntervalDomain ♦ Call Summarizer=TopInputCallSummarizer ♦ Xnf Conversion Technique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION ♦ SizeLimitFluid Max. Disjunctions=8 ♦ Simplification Technique=SIMPLIFY_QUICK ♦ SizeLimitFluid Max. DAG Size=-1 [2019-11-24 17:47:42,883 INFO L159 IcfgInterpreter]: Started Sifa with 3 locations of interest [2019-11-24 17:47:42,886 INFO L166 IcfgInterpreter]: Building call graph [2019-11-24 17:47:42,895 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-24 17:47:42,903 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-24 17:47:42,905 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-24 17:47:52,764 WARN L192 SmtUtils]: Spent 366.00 ms on a formula simplification that was a NOOP. DAG size: 476 [2019-11-24 17:47:54,491 WARN L192 SmtUtils]: Spent 499.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 129 [2019-11-24 17:47:54,654 WARN L192 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 484 [2019-11-24 17:47:55,124 WARN L192 SmtUtils]: Spent 332.00 ms on a formula simplification. DAG size of input: 623 DAG size of output: 573 [2019-11-24 17:47:55,452 WARN L192 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 623 DAG size of output: 573 [2019-11-24 17:47:55,665 WARN L192 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 571 DAG size of output: 556 [2019-11-24 17:47:56,160 WARN L192 SmtUtils]: Spent 490.00 ms on a formula simplification. DAG size of input: 635 DAG size of output: 585 [2019-11-24 17:47:56,591 WARN L192 SmtUtils]: Spent 425.00 ms on a formula simplification. DAG size of input: 635 DAG size of output: 585 [2019-11-24 17:47:57,018 WARN L192 SmtUtils]: Spent 423.00 ms on a formula simplification. DAG size of input: 580 DAG size of output: 563 [2019-11-24 17:47:57,505 WARN L192 SmtUtils]: Spent 448.00 ms on a formula simplification that was a NOOP. DAG size: 559 [2019-11-24 17:47:58,404 WARN L192 SmtUtils]: Spent 735.00 ms on a formula simplification that was a NOOP. DAG size: 659 [2019-11-24 17:48:04,542 WARN L192 SmtUtils]: Spent 3.91 s on a formula simplification. DAG size of input: 969 DAG size of output: 754 [2019-11-24 17:48:07,788 WARN L192 SmtUtils]: Spent 3.24 s on a formula simplification. DAG size of input: 969 DAG size of output: 754 [2019-11-24 17:48:10,057 WARN L192 SmtUtils]: Spent 2.26 s on a formula simplification. DAG size of input: 740 DAG size of output: 734 [2019-11-24 17:48:16,155 WARN L192 SmtUtils]: Spent 6.09 s on a formula simplification. DAG size of input: 1135 DAG size of output: 966 [2019-11-24 17:48:22,173 WARN L192 SmtUtils]: Spent 6.00 s on a formula simplification. DAG size of input: 1135 DAG size of output: 966 [2019-11-24 17:48:26,760 WARN L192 SmtUtils]: Spent 4.58 s on a formula simplification. DAG size of input: 926 DAG size of output: 913 [2019-11-24 17:48:31,014 WARN L192 SmtUtils]: Spent 4.19 s on a formula simplification that was a NOOP. DAG size: 925 [2019-11-24 17:48:37,013 WARN L192 SmtUtils]: Spent 4.78 s on a formula simplification. DAG size of input: 928 DAG size of output: 918