/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_product58.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-24 17:48:58,815 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-24 17:48:58,818 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-24 17:48:58,836 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-24 17:48:58,836 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-24 17:48:58,838 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-24 17:48:58,840 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-24 17:48:58,848 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-24 17:48:58,852 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-24 17:48:58,855 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-24 17:48:58,857 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-24 17:48:58,859 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-24 17:48:58,859 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-24 17:48:58,861 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-24 17:48:58,863 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-24 17:48:58,865 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-24 17:48:58,866 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-24 17:48:58,867 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-24 17:48:58,869 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-24 17:48:58,874 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-24 17:48:58,878 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-24 17:48:58,883 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-24 17:48:58,884 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-24 17:48:58,885 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-24 17:48:58,888 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-24 17:48:58,888 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-24 17:48:58,888 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-24 17:48:58,890 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-24 17:48:58,891 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-24 17:48:58,892 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-24 17:48:58,892 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-24 17:48:58,893 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-24 17:48:58,894 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-24 17:48:58,895 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-24 17:48:58,896 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-24 17:48:58,896 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-24 17:48:58,897 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-24 17:48:58,897 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-24 17:48:58,897 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-24 17:48:58,898 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-24 17:48:58,899 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-24 17:48:58,900 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 17:48:58,926 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-24 17:48:58,926 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-24 17:48:58,927 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-24 17:48:58,927 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-24 17:48:58,928 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-24 17:48:58,928 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-24 17:48:58,928 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-24 17:48:58,928 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-24 17:48:58,928 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-24 17:48:58,929 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-24 17:48:58,929 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-24 17:48:58,929 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-24 17:48:58,929 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-24 17:48:58,929 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-24 17:48:58,929 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-24 17:48:58,930 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-24 17:48:58,930 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-24 17:48:58,930 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-24 17:48:58,931 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-24 17:48:58,931 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-24 17:48:58,931 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-24 17:48:58,931 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-24 17:48:58,931 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-24 17:48:58,932 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-24 17:48:58,932 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-24 17:48:58,932 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-24 17:48:58,932 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-24 17:48:58,933 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-24 17:48:58,933 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-24 17:48:58,933 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-24 17:48:58,933 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-24 17:48:58,933 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-24 17:48:58,934 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-24 17:48:58,934 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-24 17:48:58,934 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-24 17:48:58,934 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-24 17:48:58,934 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-24 17:48:58,935 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-24 17:48:59,203 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-24 17:48:59,223 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-24 17:48:59,227 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-24 17:48:59,229 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-24 17:48:59,229 INFO L275 PluginConnector]: CDTParser initialized [2019-11-24 17:48:59,230 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/minepump_spec1_product58.cil.c [2019-11-24 17:48:59,301 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1a297c9fb/a44e0048363c4189b28d4c05283a3e54/FLAG9345c7d9a [2019-11-24 17:48:59,791 INFO L306 CDTParser]: Found 1 translation units. [2019-11-24 17:48:59,792 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/minepump_spec1_product58.cil.c [2019-11-24 17:48:59,804 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1a297c9fb/a44e0048363c4189b28d4c05283a3e54/FLAG9345c7d9a [2019-11-24 17:49:00,120 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1a297c9fb/a44e0048363c4189b28d4c05283a3e54 [2019-11-24 17:49:00,128 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-24 17:49:00,130 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-24 17:49:00,131 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-24 17:49:00,131 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-24 17:49:00,135 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-24 17:49:00,135 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 05:49:00" (1/1) ... [2019-11-24 17:49:00,138 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@720b1c46 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:49:00, skipping insertion in model container [2019-11-24 17:49:00,138 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 05:49:00" (1/1) ... [2019-11-24 17:49:00,146 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-24 17:49:00,197 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-24 17:49:00,657 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 17:49:00,677 INFO L203 MainTranslator]: Completed pre-run [2019-11-24 17:49:00,788 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 17:49:00,822 INFO L208 MainTranslator]: Completed translation [2019-11-24 17:49:00,823 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:49:00 WrapperNode [2019-11-24 17:49:00,824 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-24 17:49:00,824 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-24 17:49:00,825 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-24 17:49:00,825 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-24 17:49:00,833 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:49:00" (1/1) ... [2019-11-24 17:49:00,851 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:49:00" (1/1) ... [2019-11-24 17:49:00,900 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-24 17:49:00,901 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-24 17:49:00,901 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-24 17:49:00,908 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-24 17:49:00,916 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:49:00" (1/1) ... [2019-11-24 17:49:00,916 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:49:00" (1/1) ... [2019-11-24 17:49:00,922 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:49:00" (1/1) ... [2019-11-24 17:49:00,922 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:49:00" (1/1) ... [2019-11-24 17:49:00,937 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:49:00" (1/1) ... [2019-11-24 17:49:00,964 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:49:00" (1/1) ... [2019-11-24 17:49:00,972 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:49:00" (1/1) ... [2019-11-24 17:49:00,986 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-24 17:49:00,987 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-24 17:49:00,987 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-24 17:49:00,987 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-24 17:49:00,989 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:49:00" (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 17:49:01,057 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-24 17:49:01,061 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-11-24 17:49:01,061 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-24 17:49:01,061 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-24 17:49:03,632 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-24 17:49:03,633 INFO L284 CfgBuilder]: Removed 194 assume(true) statements. [2019-11-24 17:49:03,634 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 05:49:03 BoogieIcfgContainer [2019-11-24 17:49:03,634 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-24 17:49:03,635 INFO L113 PluginConnector]: ------------------------Sifa---------------------------- [2019-11-24 17:49:03,635 INFO L271 PluginConnector]: Initializing Sifa... [2019-11-24 17:49:03,635 INFO L275 PluginConnector]: Sifa initialized [2019-11-24 17:49:03,636 INFO L185 PluginConnector]: Executing the observer SifaObserver from plugin Sifa for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 05:49:03" (1/1) ... [2019-11-24 17:49:03,637 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 17:49:03,660 INFO L159 IcfgInterpreter]: Started Sifa with 3 locations of interest [2019-11-24 17:49:03,660 INFO L166 IcfgInterpreter]: Building call graph [2019-11-24 17:49:03,667 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-24 17:49:03,674 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-24 17:49:03,676 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-24 17:49:13,116 WARN L192 SmtUtils]: Spent 324.00 ms on a formula simplification that was a NOOP. DAG size: 476 [2019-11-24 17:49:14,769 WARN L192 SmtUtils]: Spent 496.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 129 [2019-11-24 17:49:14,903 WARN L192 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 484 [2019-11-24 17:49:15,261 WARN L192 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 603 DAG size of output: 603 [2019-11-24 17:49:15,499 WARN L192 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 603 DAG size of output: 603 [2019-11-24 17:49:15,709 WARN L192 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 603 [2019-11-24 17:49:16,213 WARN L192 SmtUtils]: Spent 500.00 ms on a formula simplification. DAG size of input: 607 DAG size of output: 605 [2019-11-24 17:49:16,627 WARN L192 SmtUtils]: Spent 410.00 ms on a formula simplification. DAG size of input: 607 DAG size of output: 605 [2019-11-24 17:49:17,022 WARN L192 SmtUtils]: Spent 391.00 ms on a formula simplification that was a NOOP. DAG size: 605 [2019-11-24 17:49:17,478 WARN L192 SmtUtils]: Spent 410.00 ms on a formula simplification that was a NOOP. DAG size: 606 [2019-11-24 17:49:18,545 WARN L192 SmtUtils]: Spent 537.00 ms on a formula simplification that was a NOOP. DAG size: 706 [2019-11-24 17:49:24,789 WARN L192 SmtUtils]: Spent 5.23 s on a formula simplification. DAG size of input: 1016 DAG size of output: 949 [2019-11-24 17:49:28,648 WARN L192 SmtUtils]: Spent 3.85 s on a formula simplification. DAG size of input: 1016 DAG size of output: 949 [2019-11-24 17:49:32,369 WARN L192 SmtUtils]: Spent 3.71 s on a formula simplification. DAG size of input: 939 DAG size of output: 937 [2019-11-24 17:49:38,624 WARN L192 SmtUtils]: Spent 6.24 s on a formula simplification. DAG size of input: 1173 DAG size of output: 1076 [2019-11-24 17:49:45,429 WARN L192 SmtUtils]: Spent 6.79 s on a formula simplification. DAG size of input: 1173 DAG size of output: 1076 [2019-11-24 17:49:50,720 WARN L192 SmtUtils]: Spent 5.28 s on a formula simplification. DAG size of input: 1032 DAG size of output: 1015 [2019-11-24 17:49:55,964 WARN L192 SmtUtils]: Spent 5.18 s on a formula simplification that was a NOOP. DAG size: 1023 [2019-11-24 17:50:14,640 WARN L192 SmtUtils]: Spent 6.45 s on a formula simplification. DAG size of input: 1027 DAG size of output: 1022