java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/SifaC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --sifa.abstract.domain CompoundDomain --rcfgbuilder.size.of.a.code.block LoopFreeBlock --sifa.call.summarizer TopInputCallSummarizer --sifa.fluid SizeLimitFluid --sifa.intern.fluid SizeLimitFluid --sifa.simplification.technique SIMPLIFY_QUICK -i ../../../trunk/examples/svcomp/loops/sum04-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fea9116 [2019-09-21 09:47:51,105 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-21 09:47:51,108 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-21 09:47:51,127 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-09-21 09:47:51,127 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-09-21 09:47:51,129 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-09-21 09:47:51,131 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-09-21 09:47:51,140 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-09-21 09:47:51,145 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-09-21 09:47:51,148 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-09-21 09:47:51,149 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-09-21 09:47:51,151 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-09-21 09:47:51,151 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-21 09:47:51,153 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-21 09:47:51,155 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-21 09:47:51,156 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-21 09:47:51,157 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-21 09:47:51,159 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-21 09:47:51,161 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-21 09:47:51,165 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-21 09:47:51,169 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-21 09:47:51,171 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-21 09:47:51,174 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-21 09:47:51,175 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-21 09:47:51,177 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-09-21 09:47:51,177 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-09-21 09:47:51,178 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-09-21 09:47:51,179 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-09-21 09:47:51,180 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-09-21 09:47:51,182 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-09-21 09:47:51,182 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-21 09:47:51,183 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-21 09:47:51,184 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-21 09:47:51,184 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-21 09:47:51,186 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-21 09:47:51,186 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-21 09:47:51,187 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-21 09:47:51,187 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-21 09:47:51,187 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-21 09:47:51,188 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-21 09:47:51,189 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-21 09:47:51,190 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-09-21 09:47:51,226 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-21 09:47:51,227 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-21 09:47:51,228 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-09-21 09:47:51,228 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-09-21 09:47:51,228 INFO L138 SettingsManager]: * Use SBE=true [2019-09-21 09:47:51,229 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-21 09:47:51,229 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-21 09:47:51,229 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-09-21 09:47:51,229 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-21 09:47:51,229 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-21 09:47:51,230 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-21 09:47:51,230 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-21 09:47:51,230 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-21 09:47:51,233 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-21 09:47:51,233 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-21 09:47:51,234 INFO L138 SettingsManager]: * Use constant arrays=true [2019-09-21 09:47:51,234 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-21 09:47:51,234 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-21 09:47:51,234 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-21 09:47:51,235 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-09-21 09:47:51,235 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-09-21 09:47:51,235 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-21 09:47:51,235 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-21 09:47:51,236 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-21 09:47:51,236 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-09-21 09:47:51,236 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-09-21 09:47:51,237 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-21 09:47:51,237 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-09-21 09:47:51,237 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> CompoundDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> LoopFreeBlock Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Call Summarizer -> TopInputCallSummarizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Fluid -> SizeLimitFluid Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Intern Fluid -> SizeLimitFluid Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Simplification Technique -> SIMPLIFY_QUICK [2019-09-21 09:47:51,274 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-21 09:47:51,288 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-21 09:47:51,292 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-21 09:47:51,294 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-21 09:47:51,294 INFO L275 PluginConnector]: CDTParser initialized [2019-09-21 09:47:51,295 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum04-1.i [2019-09-21 09:47:51,368 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e065474fa/faa3c983ff6e41c5812921103998931c/FLAG7acc28589 [2019-09-21 09:47:51,833 INFO L306 CDTParser]: Found 1 translation units. [2019-09-21 09:47:51,834 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/sum04-1.i [2019-09-21 09:47:51,840 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e065474fa/faa3c983ff6e41c5812921103998931c/FLAG7acc28589 [2019-09-21 09:47:52,256 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e065474fa/faa3c983ff6e41c5812921103998931c [2019-09-21 09:47:52,268 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-21 09:47:52,269 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-21 09:47:52,270 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-21 09:47:52,271 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-21 09:47:52,274 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-21 09:47:52,275 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 09:47:52" (1/1) ... [2019-09-21 09:47:52,277 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5492945c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 09:47:52, skipping insertion in model container [2019-09-21 09:47:52,277 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 09:47:52" (1/1) ... [2019-09-21 09:47:52,284 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-21 09:47:52,300 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-21 09:47:52,473 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-21 09:47:52,478 INFO L188 MainTranslator]: Completed pre-run [2019-09-21 09:47:52,489 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-21 09:47:52,500 INFO L192 MainTranslator]: Completed translation [2019-09-21 09:47:52,500 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 09:47:52 WrapperNode [2019-09-21 09:47:52,500 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-21 09:47:52,501 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-21 09:47:52,501 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-21 09:47:52,501 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-21 09:47:52,612 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 09:47:52" (1/1) ... [2019-09-21 09:47:52,612 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 09:47:52" (1/1) ... [2019-09-21 09:47:52,617 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 09:47:52" (1/1) ... [2019-09-21 09:47:52,617 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 09:47:52" (1/1) ... [2019-09-21 09:47:52,620 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 09:47:52" (1/1) ... [2019-09-21 09:47:52,625 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 09:47:52" (1/1) ... [2019-09-21 09:47:52,626 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 09:47:52" (1/1) ... [2019-09-21 09:47:52,628 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-21 09:47:52,628 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-21 09:47:52,628 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-21 09:47:52,628 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-21 09:47:52,629 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 09:47:52" (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 [2019-09-21 09:47:52,691 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-21 09:47:52,691 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-21 09:47:52,691 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-09-21 09:47:52,691 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-21 09:47:52,692 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-21 09:47:52,692 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-09-21 09:47:52,692 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-21 09:47:52,692 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-21 09:47:52,692 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-21 09:47:52,870 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-21 09:47:52,871 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-21 09:47:52,872 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 09:47:52 BoogieIcfgContainer [2019-09-21 09:47:52,872 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-21 09:47:52,873 INFO L113 PluginConnector]: ------------------------Sifa---------------------------- [2019-09-21 09:47:52,873 INFO L271 PluginConnector]: Initializing Sifa... [2019-09-21 09:47:52,873 INFO L275 PluginConnector]: Sifa initialized [2019-09-21 09:47:52,874 INFO L185 PluginConnector]: Executing the observer SifaObserver from plugin Sifa for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 09:47:52" (1/1) ... [2019-09-21 09:47:52,875 INFO L79 SifaObserver]: Intern domains=ExplicitValueDomain;IntervalDomain ♦ Abstract Domain=CompoundDomain ♦ Abstract when formula's dag size exceeds (negative numbers disable this limit)=-1 ♦ Fluid=SizeLimitFluid ♦ Max. Parallel Explicit Values=2 ♦ Max. Parallel Intervals=2 ♦ Loop Summarizer=FixpointLoopSummarizer ♦ Abstract when formula has more disjuncts than (negative numbers disable this limit)=8 ♦ Call Summarizer=TopInputCallSummarizer ♦ Xnf Conversion Technique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION ♦ Simplification Technique=SIMPLIFY_QUICK ♦ Intern Fluid=SizeLimitFluid [2019-09-21 09:47:52,900 INFO L162 IcfgInterpreter]: Started Sifa with 1 locations of interest [2019-09-21 09:47:52,900 INFO L169 IcfgInterpreter]: Building call graph [2019-09-21 09:47:52,908 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-09-21 09:47:52,918 INFO L179 IcfgInterpreter]: Starting interpretation [2019-09-21 09:47:52,919 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-09-21 09:47:53,009 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 1 for LOIs [2019-09-21 09:47:54,566 WARN L191 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 278 DAG size of output: 278 [2019-09-21 09:47:54,727 WARN L191 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 278 [2019-09-21 09:47:54,902 WARN L191 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 278 DAG size of output: 263 [2019-09-21 09:47:55,111 WARN L191 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 372 [2019-09-21 09:47:55,277 WARN L191 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 372 [2019-09-21 09:47:55,512 WARN L191 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 373 DAG size of output: 371 [2019-09-21 09:47:55,885 WARN L191 SmtUtils]: Spent 276.00 ms on a formula simplification that was a NOOP. DAG size: 606 [2019-09-21 09:47:56,206 WARN L191 SmtUtils]: Spent 319.00 ms on a formula simplification that was a NOOP. DAG size: 606 [2019-09-21 09:47:56,639 WARN L191 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 606 DAG size of output: 575 [2019-09-21 09:47:57,125 WARN L191 SmtUtils]: Spent 452.00 ms on a formula simplification. DAG size of input: 759 DAG size of output: 754 [2019-09-21 09:47:57,684 WARN L191 SmtUtils]: Spent 554.00 ms on a formula simplification that was a NOOP. DAG size: 754 [2019-09-21 09:47:58,263 WARN L191 SmtUtils]: Spent 441.00 ms on a formula simplification. DAG size of input: 755 DAG size of output: 743 [2019-09-21 09:47:59,144 WARN L191 SmtUtils]: Spent 827.00 ms on a formula simplification that was a NOOP. DAG size: 1184 [2019-09-21 09:47:59,750 WARN L191 SmtUtils]: Spent 603.00 ms on a formula simplification that was a NOOP. DAG size: 1184 [2019-09-21 09:48:00,749 WARN L191 SmtUtils]: Spent 663.00 ms on a formula simplification. DAG size of input: 1184 DAG size of output: 1148 [2019-09-21 09:48:01,858 WARN L191 SmtUtils]: Spent 1.07 s on a formula simplification that was a NOOP. DAG size: 1587 [2019-09-21 09:48:02,899 WARN L191 SmtUtils]: Spent 1.04 s on a formula simplification that was a NOOP. DAG size: 1587 [2019-09-21 09:48:05,010 WARN L191 SmtUtils]: Spent 1.45 s on a formula simplification. DAG size of input: 1588 DAG size of output: 1585 [2019-09-21 09:48:07,398 WARN L191 SmtUtils]: Spent 2.26 s on a formula simplification. DAG size of input: 2346 DAG size of output: 2285 [2019-09-21 09:48:09,590 WARN L191 SmtUtils]: Spent 2.19 s on a formula simplification that was a NOOP. DAG size: 2285 [2019-09-21 09:48:13,270 WARN L191 SmtUtils]: Spent 2.23 s on a formula simplification. DAG size of input: 2285 DAG size of output: 2268 [2019-09-21 09:48:16,766 WARN L191 SmtUtils]: Spent 3.41 s on a formula simplification. DAG size of input: 3167 DAG size of output: 3076 [2019-09-21 09:48:20,511 WARN L191 SmtUtils]: Spent 3.74 s on a formula simplification. DAG size of input: 3076 DAG size of output: 3075 [2019-09-21 09:48:26,220 WARN L191 SmtUtils]: Spent 4.13 s on a formula simplification. DAG size of input: 3076 DAG size of output: 3073 [2019-09-21 09:48:32,898 WARN L191 SmtUtils]: Spent 6.45 s on a formula simplification. DAG size of input: 3994 DAG size of output: 3926