/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_product03.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-24 17:42:18,737 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-24 17:42:18,740 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-24 17:42:18,758 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-24 17:42:18,758 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-24 17:42:18,760 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-24 17:42:18,762 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-24 17:42:18,771 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-24 17:42:18,776 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-24 17:42:18,780 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-24 17:42:18,780 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-24 17:42:18,781 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-24 17:42:18,782 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-24 17:42:18,783 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-24 17:42:18,783 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-24 17:42:18,784 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-24 17:42:18,785 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-24 17:42:18,786 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-24 17:42:18,787 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-24 17:42:18,791 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-24 17:42:18,792 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-24 17:42:18,793 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-24 17:42:18,794 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-24 17:42:18,795 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-24 17:42:18,796 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-24 17:42:18,797 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-24 17:42:18,797 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-24 17:42:18,798 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-24 17:42:18,798 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-24 17:42:18,799 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-24 17:42:18,799 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-24 17:42:18,800 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-24 17:42:18,801 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-24 17:42:18,801 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-24 17:42:18,802 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-24 17:42:18,803 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-24 17:42:18,803 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-24 17:42:18,804 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-24 17:42:18,804 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-24 17:42:18,807 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-24 17:42:18,808 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-24 17:42:18,809 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 17:42:18,839 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-24 17:42:18,839 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-24 17:42:18,840 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-24 17:42:18,842 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-24 17:42:18,842 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-24 17:42:18,842 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-24 17:42:18,842 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-24 17:42:18,842 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-24 17:42:18,843 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-24 17:42:18,843 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-24 17:42:18,843 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-24 17:42:18,843 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-24 17:42:18,843 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-24 17:42:18,844 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-24 17:42:18,844 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-24 17:42:18,844 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-24 17:42:18,845 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-24 17:42:18,845 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-24 17:42:18,845 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-24 17:42:18,845 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-24 17:42:18,845 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-24 17:42:18,846 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-24 17:42:18,847 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-24 17:42:18,848 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-24 17:42:18,848 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-24 17:42:18,848 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-24 17:42:18,848 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-24 17:42:18,848 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-24 17:42:18,850 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-24 17:42:18,850 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-24 17:42:18,850 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-24 17:42:18,850 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-24 17:42:18,851 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-24 17:42:18,851 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-24 17:42:18,851 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-24 17:42:18,852 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-24 17:42:18,852 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-24 17:42:18,852 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-24 17:42:19,111 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-24 17:42:19,122 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-24 17:42:19,126 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-24 17:42:19,127 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-24 17:42:19,127 INFO L275 PluginConnector]: CDTParser initialized [2019-11-24 17:42:19,128 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/minepump_spec1_product03.cil.c [2019-11-24 17:42:19,197 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7a6768b97/bb878cf541ce4e8a83f8d725e037177f/FLAGf445c5779 [2019-11-24 17:42:19,761 INFO L306 CDTParser]: Found 1 translation units. [2019-11-24 17:42:19,762 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/minepump_spec1_product03.cil.c [2019-11-24 17:42:19,775 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7a6768b97/bb878cf541ce4e8a83f8d725e037177f/FLAGf445c5779 [2019-11-24 17:42:20,049 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7a6768b97/bb878cf541ce4e8a83f8d725e037177f [2019-11-24 17:42:20,061 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-24 17:42:20,063 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-24 17:42:20,063 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-24 17:42:20,064 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-24 17:42:20,067 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-24 17:42:20,068 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 05:42:20" (1/1) ... [2019-11-24 17:42:20,071 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1304264b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:42:20, skipping insertion in model container [2019-11-24 17:42:20,071 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 05:42:20" (1/1) ... [2019-11-24 17:42:20,078 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-24 17:42:20,119 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-24 17:42:20,578 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 17:42:20,590 INFO L203 MainTranslator]: Completed pre-run [2019-11-24 17:42:20,682 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 17:42:20,724 INFO L208 MainTranslator]: Completed translation [2019-11-24 17:42:20,725 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:42:20 WrapperNode [2019-11-24 17:42:20,725 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-24 17:42:20,726 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-24 17:42:20,726 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-24 17:42:20,726 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-24 17:42:20,733 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:42:20" (1/1) ... [2019-11-24 17:42:20,766 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:42:20" (1/1) ... [2019-11-24 17:42:20,799 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-24 17:42:20,800 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-24 17:42:20,800 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-24 17:42:20,800 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-24 17:42:20,808 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:42:20" (1/1) ... [2019-11-24 17:42:20,808 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:42:20" (1/1) ... [2019-11-24 17:42:20,811 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:42:20" (1/1) ... [2019-11-24 17:42:20,812 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:42:20" (1/1) ... [2019-11-24 17:42:20,820 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:42:20" (1/1) ... [2019-11-24 17:42:20,826 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:42:20" (1/1) ... [2019-11-24 17:42:20,829 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:42:20" (1/1) ... [2019-11-24 17:42:20,833 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-24 17:42:20,833 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-24 17:42:20,833 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-24 17:42:20,834 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-24 17:42:20,834 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:42:20" (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 17:42:20,916 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-24 17:42:20,916 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-11-24 17:42:20,917 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-24 17:42:20,917 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-24 17:42:21,982 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-24 17:42:21,982 INFO L284 CfgBuilder]: Removed 70 assume(true) statements. [2019-11-24 17:42:21,983 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 05:42:21 BoogieIcfgContainer [2019-11-24 17:42:21,984 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-24 17:42:21,984 INFO L113 PluginConnector]: ------------------------Sifa---------------------------- [2019-11-24 17:42:21,984 INFO L271 PluginConnector]: Initializing Sifa... [2019-11-24 17:42:21,985 INFO L275 PluginConnector]: Sifa initialized [2019-11-24 17:42:21,986 INFO L185 PluginConnector]: Executing the observer SifaObserver from plugin Sifa for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 05:42:21" (1/1) ... [2019-11-24 17:42:21,986 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 17:42:22,011 INFO L159 IcfgInterpreter]: Started Sifa with 3 locations of interest [2019-11-24 17:42:22,011 INFO L166 IcfgInterpreter]: Building call graph [2019-11-24 17:42:22,019 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-24 17:42:22,026 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-24 17:42:22,028 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-24 17:42:30,555 WARN L192 SmtUtils]: Spent 363.00 ms on a formula simplification that was a NOOP. DAG size: 476 [2019-11-24 17:42:32,233 WARN L192 SmtUtils]: Spent 441.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 129 [2019-11-24 17:42:32,420 WARN L192 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 484 [2019-11-24 17:42:32,844 WARN L192 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 557 DAG size of output: 549 [2019-11-24 17:42:33,063 WARN L192 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 557 DAG size of output: 549 [2019-11-24 17:42:33,284 WARN L192 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 549 [2019-11-24 17:42:33,712 WARN L192 SmtUtils]: Spent 425.00 ms on a formula simplification. DAG size of input: 562 DAG size of output: 551 [2019-11-24 17:42:34,081 WARN L192 SmtUtils]: Spent 363.00 ms on a formula simplification. DAG size of input: 562 DAG size of output: 551 [2019-11-24 17:42:34,395 WARN L192 SmtUtils]: Spent 310.00 ms on a formula simplification that was a NOOP. DAG size: 551 [2019-11-24 17:42:36,266 WARN L192 SmtUtils]: Spent 1.59 s on a formula simplification. DAG size of input: 640 DAG size of output: 623 [2019-11-24 17:42:39,184 WARN L192 SmtUtils]: Spent 2.45 s on a formula simplification. DAG size of input: 727 DAG size of output: 727 [2019-11-24 17:42:40,849 WARN L192 SmtUtils]: Spent 1.54 s on a formula simplification. DAG size of input: 727 DAG size of output: 720 [2019-11-24 17:42:42,256 WARN L192 SmtUtils]: Spent 1.40 s on a formula simplification. DAG size of input: 727 DAG size of output: 720 [2019-11-24 17:42:43,651 WARN L192 SmtUtils]: Spent 1.39 s on a formula simplification that was a NOOP. DAG size: 719 [2019-11-24 17:42:46,193 WARN L192 SmtUtils]: Spent 2.54 s on a formula simplification that was a NOOP. DAG size: 769 [2019-11-24 17:42:48,803 WARN L192 SmtUtils]: Spent 2.61 s on a formula simplification that was a NOOP. DAG size: 769 [2019-11-24 17:42:51,333 WARN L192 SmtUtils]: Spent 2.53 s on a formula simplification that was a NOOP. DAG size: 769 [2019-11-24 17:43:27,663 WARN L192 SmtUtils]: Spent 30.47 s on a formula simplification. DAG size of input: 1860 DAG size of output: 1305 [2019-11-24 17:43:52,947 WARN L192 SmtUtils]: Spent 20.82 s on a formula simplification. DAG size of input: 1250 DAG size of output: 1215