/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_spec5_product50.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-24 18:21:08,876 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-24 18:21:08,879 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-24 18:21:08,890 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-24 18:21:08,891 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-24 18:21:08,892 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-24 18:21:08,893 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-24 18:21:08,895 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-24 18:21:08,896 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-24 18:21:08,897 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-24 18:21:08,898 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-24 18:21:08,899 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-24 18:21:08,899 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-24 18:21:08,900 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-24 18:21:08,901 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-24 18:21:08,902 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-24 18:21:08,903 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-24 18:21:08,904 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-24 18:21:08,907 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-24 18:21:08,909 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-24 18:21:08,912 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-24 18:21:08,914 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-24 18:21:08,916 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-24 18:21:08,916 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-24 18:21:08,922 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-24 18:21:08,922 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-24 18:21:08,922 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-24 18:21:08,923 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-24 18:21:08,923 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-24 18:21:08,925 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-24 18:21:08,925 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-24 18:21:08,926 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-24 18:21:08,928 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-24 18:21:08,929 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-24 18:21:08,930 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-24 18:21:08,930 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-24 18:21:08,931 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-24 18:21:08,931 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-24 18:21:08,931 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-24 18:21:08,935 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-24 18:21:08,936 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-24 18:21:08,938 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 18:21:08,961 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-24 18:21:08,961 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-24 18:21:08,962 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-24 18:21:08,963 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-24 18:21:08,963 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-24 18:21:08,963 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-24 18:21:08,963 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-24 18:21:08,963 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-24 18:21:08,964 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-24 18:21:08,964 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-24 18:21:08,965 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-24 18:21:08,965 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-24 18:21:08,965 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-24 18:21:08,966 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-24 18:21:08,966 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-24 18:21:08,967 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-24 18:21:08,967 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-24 18:21:08,967 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-24 18:21:08,967 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-24 18:21:08,968 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-24 18:21:08,968 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-24 18:21:08,968 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-24 18:21:08,968 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-24 18:21:08,968 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-24 18:21:08,969 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-24 18:21:08,969 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-24 18:21:08,969 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-24 18:21:08,969 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-24 18:21:08,970 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-24 18:21:08,970 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-24 18:21:08,971 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-24 18:21:08,971 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-24 18:21:08,971 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-24 18:21:08,971 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-24 18:21:08,972 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-24 18:21:08,972 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-24 18:21:08,972 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-24 18:21:08,973 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-24 18:21:09,218 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-24 18:21:09,231 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-24 18:21:09,235 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-24 18:21:09,236 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-24 18:21:09,236 INFO L275 PluginConnector]: CDTParser initialized [2019-11-24 18:21:09,237 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/minepump_spec5_product50.cil.c [2019-11-24 18:21:09,303 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f777bdd74/ff3b098cb4294680bb6649be8feddee0/FLAG93c925175 [2019-11-24 18:21:09,821 INFO L306 CDTParser]: Found 1 translation units. [2019-11-24 18:21:09,825 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/minepump_spec5_product50.cil.c [2019-11-24 18:21:09,837 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f777bdd74/ff3b098cb4294680bb6649be8feddee0/FLAG93c925175 [2019-11-24 18:21:10,121 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f777bdd74/ff3b098cb4294680bb6649be8feddee0 [2019-11-24 18:21:10,129 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-24 18:21:10,131 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-24 18:21:10,132 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-24 18:21:10,132 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-24 18:21:10,135 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-24 18:21:10,136 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 06:21:10" (1/1) ... [2019-11-24 18:21:10,142 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@37c7b418 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 06:21:10, skipping insertion in model container [2019-11-24 18:21:10,142 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 06:21:10" (1/1) ... [2019-11-24 18:21:10,152 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-24 18:21:10,213 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-24 18:21:10,671 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 18:21:10,689 INFO L203 MainTranslator]: Completed pre-run [2019-11-24 18:21:10,813 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 18:21:10,847 INFO L208 MainTranslator]: Completed translation [2019-11-24 18:21:10,848 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 06:21:10 WrapperNode [2019-11-24 18:21:10,848 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-24 18:21:10,849 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-24 18:21:10,849 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-24 18:21:10,849 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-24 18:21:10,856 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 06:21:10" (1/1) ... [2019-11-24 18:21:10,875 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 06:21:10" (1/1) ... [2019-11-24 18:21:10,922 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-24 18:21:10,922 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-24 18:21:10,922 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-24 18:21:10,923 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-24 18:21:10,940 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 06:21:10" (1/1) ... [2019-11-24 18:21:10,940 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 06:21:10" (1/1) ... [2019-11-24 18:21:10,946 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 06:21:10" (1/1) ... [2019-11-24 18:21:10,946 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 06:21:10" (1/1) ... [2019-11-24 18:21:10,959 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 06:21:10" (1/1) ... [2019-11-24 18:21:10,968 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 06:21:10" (1/1) ... [2019-11-24 18:21:10,972 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 06:21:10" (1/1) ... [2019-11-24 18:21:10,978 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-24 18:21:10,978 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-24 18:21:10,978 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-24 18:21:10,978 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-24 18:21:10,979 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 06:21:10" (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 18:21:11,048 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-24 18:21:11,050 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-11-24 18:21:11,050 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-24 18:21:11,051 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-24 18:21:13,188 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-24 18:21:13,189 INFO L284 CfgBuilder]: Removed 172 assume(true) statements. [2019-11-24 18:21:13,190 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 06:21:13 BoogieIcfgContainer [2019-11-24 18:21:13,190 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-24 18:21:13,191 INFO L113 PluginConnector]: ------------------------Sifa---------------------------- [2019-11-24 18:21:13,191 INFO L271 PluginConnector]: Initializing Sifa... [2019-11-24 18:21:13,191 INFO L275 PluginConnector]: Sifa initialized [2019-11-24 18:21:13,192 INFO L185 PluginConnector]: Executing the observer SifaObserver from plugin Sifa for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 06:21:13" (1/1) ... [2019-11-24 18:21:13,193 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 18:21:13,220 INFO L159 IcfgInterpreter]: Started Sifa with 3 locations of interest [2019-11-24 18:21:13,220 INFO L166 IcfgInterpreter]: Building call graph [2019-11-24 18:21:13,231 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-24 18:21:13,241 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-24 18:21:13,242 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-24 18:21:22,124 WARN L192 SmtUtils]: Spent 419.00 ms on a formula simplification that was a NOOP. DAG size: 478 [2019-11-24 18:21:24,052 WARN L192 SmtUtils]: Spent 629.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 129 [2019-11-24 18:21:24,215 WARN L192 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 486 [2019-11-24 18:21:24,628 WARN L192 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 591 DAG size of output: 591 [2019-11-24 18:21:24,873 WARN L192 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 591 DAG size of output: 591 [2019-11-24 18:21:25,144 WARN L192 SmtUtils]: Spent 267.00 ms on a formula simplification that was a NOOP. DAG size: 591 [2019-11-24 18:21:25,743 WARN L192 SmtUtils]: Spent 595.00 ms on a formula simplification. DAG size of input: 660 DAG size of output: 601 [2019-11-24 18:21:26,181 WARN L192 SmtUtils]: Spent 433.00 ms on a formula simplification. DAG size of input: 660 DAG size of output: 601 [2019-11-24 18:21:26,583 WARN L192 SmtUtils]: Spent 398.00 ms on a formula simplification that was a NOOP. DAG size: 600 [2019-11-24 18:21:27,132 WARN L192 SmtUtils]: Spent 504.00 ms on a formula simplification that was a NOOP. DAG size: 601 [2019-11-24 18:21:28,070 WARN L192 SmtUtils]: Spent 554.00 ms on a formula simplification that was a NOOP. DAG size: 703 [2019-11-24 18:21:29,404 WARN L192 SmtUtils]: Spent 1.09 s on a formula simplification. DAG size of input: 851 DAG size of output: 802 [2019-11-24 18:21:30,458 WARN L192 SmtUtils]: Spent 1.05 s on a formula simplification. DAG size of input: 851 DAG size of output: 802 [2019-11-24 18:21:31,293 WARN L192 SmtUtils]: Spent 830.00 ms on a formula simplification. DAG size of input: 798 DAG size of output: 798 [2019-11-24 18:21:32,252 WARN L192 SmtUtils]: Spent 952.00 ms on a formula simplification. DAG size of input: 911 DAG size of output: 848 [2019-11-24 18:21:33,172 WARN L192 SmtUtils]: Spent 914.00 ms on a formula simplification. DAG size of input: 911 DAG size of output: 848 [2019-11-24 18:21:34,129 WARN L192 SmtUtils]: Spent 951.00 ms on a formula simplification. DAG size of input: 842 DAG size of output: 840 [2019-11-24 18:21:35,421 WARN L192 SmtUtils]: Spent 1.22 s on a formula simplification that was a NOOP. DAG size: 856 [2019-11-24 18:21:42,497 WARN L192 SmtUtils]: Spent 1.60 s on a formula simplification. DAG size of input: 860 DAG size of output: 860 [2019-11-24 18:22:28,485 WARN L192 SmtUtils]: Spent 35.91 s on a formula simplification. DAG size of input: 2161 DAG size of output: 1437