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_DDA -i ../../../trunk/examples/svcomp/loops/for_infinite_loop_1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fea9116 [2019-09-20 17:19:25,257 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-20 17:19:25,259 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-20 17:19:25,271 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-09-20 17:19:25,272 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-09-20 17:19:25,273 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-09-20 17:19:25,274 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-09-20 17:19:25,276 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-09-20 17:19:25,278 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-09-20 17:19:25,279 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-09-20 17:19:25,280 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-09-20 17:19:25,281 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-09-20 17:19:25,281 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-20 17:19:25,283 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-20 17:19:25,284 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-20 17:19:25,285 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-20 17:19:25,286 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-20 17:19:25,287 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-20 17:19:25,288 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-20 17:19:25,291 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-20 17:19:25,292 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-20 17:19:25,294 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-20 17:19:25,295 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-20 17:19:25,296 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-20 17:19:25,298 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-09-20 17:19:25,299 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-09-20 17:19:25,299 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-09-20 17:19:25,300 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-09-20 17:19:25,300 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-09-20 17:19:25,301 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-09-20 17:19:25,302 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-20 17:19:25,302 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-20 17:19:25,303 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-20 17:19:25,304 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-20 17:19:25,305 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-20 17:19:25,306 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-20 17:19:25,306 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-20 17:19:25,307 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-20 17:19:25,307 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-20 17:19:25,308 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-20 17:19:25,309 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-20 17:19:25,310 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 [2019-09-20 17:19:25,325 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-20 17:19:25,325 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-20 17:19:25,327 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-09-20 17:19:25,327 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-09-20 17:19:25,327 INFO L138 SettingsManager]: * Use SBE=true [2019-09-20 17:19:25,327 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-20 17:19:25,327 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-20 17:19:25,328 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-09-20 17:19:25,328 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-20 17:19:25,328 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-20 17:19:25,328 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-20 17:19:25,328 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-20 17:19:25,329 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-20 17:19:25,329 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-20 17:19:25,329 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-20 17:19:25,329 INFO L138 SettingsManager]: * Use constant arrays=true [2019-09-20 17:19:25,329 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-20 17:19:25,330 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-20 17:19:25,330 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-20 17:19:25,330 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-09-20 17:19:25,330 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-09-20 17:19:25,330 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-20 17:19:25,331 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-20 17:19:25,331 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-20 17:19:25,331 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-09-20 17:19:25,331 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-09-20 17:19:25,331 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-20 17:19:25,332 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-09-20 17:19:25,332 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_DDA [2019-09-20 17:19:25,362 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-20 17:19:25,375 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-20 17:19:25,378 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-20 17:19:25,380 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-20 17:19:25,380 INFO L275 PluginConnector]: CDTParser initialized [2019-09-20 17:19:25,381 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/for_infinite_loop_1.c [2019-09-20 17:19:25,447 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bade85aaf/7f9542a0086d4220844bf5de36eb10db/FLAGf3fb388a3 [2019-09-20 17:19:25,838 INFO L306 CDTParser]: Found 1 translation units. [2019-09-20 17:19:25,842 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/for_infinite_loop_1.c [2019-09-20 17:19:25,849 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bade85aaf/7f9542a0086d4220844bf5de36eb10db/FLAGf3fb388a3 [2019-09-20 17:19:26,207 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bade85aaf/7f9542a0086d4220844bf5de36eb10db [2019-09-20 17:19:26,215 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-20 17:19:26,217 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-20 17:19:26,218 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-20 17:19:26,218 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-20 17:19:26,221 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-20 17:19:26,222 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 05:19:26" (1/1) ... [2019-09-20 17:19:26,225 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@66168d90 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 05:19:26, skipping insertion in model container [2019-09-20 17:19:26,225 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 05:19:26" (1/1) ... [2019-09-20 17:19:26,232 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-20 17:19:26,251 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-20 17:19:26,396 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-20 17:19:26,399 INFO L188 MainTranslator]: Completed pre-run [2019-09-20 17:19:26,413 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-20 17:19:26,424 INFO L192 MainTranslator]: Completed translation [2019-09-20 17:19:26,424 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 05:19:26 WrapperNode [2019-09-20 17:19:26,424 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-20 17:19:26,425 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-20 17:19:26,425 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-20 17:19:26,425 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-20 17:19:26,434 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 05:19:26" (1/1) ... [2019-09-20 17:19:26,435 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 05:19:26" (1/1) ... [2019-09-20 17:19:26,520 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 05:19:26" (1/1) ... [2019-09-20 17:19:26,520 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 05:19:26" (1/1) ... [2019-09-20 17:19:26,524 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 05:19:26" (1/1) ... [2019-09-20 17:19:26,530 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 05:19:26" (1/1) ... [2019-09-20 17:19:26,531 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 05:19:26" (1/1) ... [2019-09-20 17:19:26,532 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-20 17:19:26,533 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-20 17:19:26,533 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-20 17:19:26,533 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-20 17:19:26,534 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 05:19:26" (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 [2019-09-20 17:19:26,586 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-20 17:19:26,586 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-20 17:19:26,586 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-09-20 17:19:26,586 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-20 17:19:26,586 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-20 17:19:26,586 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-09-20 17:19:26,587 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-09-20 17:19:26,587 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-20 17:19:26,587 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-20 17:19:26,587 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-20 17:19:26,587 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-20 17:19:26,767 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-20 17:19:26,768 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-20 17:19:26,769 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 05:19:26 BoogieIcfgContainer [2019-09-20 17:19:26,769 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-20 17:19:26,770 INFO L113 PluginConnector]: ------------------------Sifa---------------------------- [2019-09-20 17:19:26,770 INFO L271 PluginConnector]: Initializing Sifa... [2019-09-20 17:19:26,770 INFO L275 PluginConnector]: Sifa initialized [2019-09-20 17:19:26,772 INFO L185 PluginConnector]: Executing the observer SifaObserver from plugin Sifa for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 05:19:26" (1/1) ... [2019-09-20 17:19:26,779 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_DDA ♦ Intern Fluid=SizeLimitFluid [2019-09-20 17:19:26,818 INFO L162 IcfgInterpreter]: Started Sifa with 1 locations of interest [2019-09-20 17:19:26,818 INFO L169 IcfgInterpreter]: Building call graph [2019-09-20 17:19:26,852 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-09-20 17:19:26,862 INFO L179 IcfgInterpreter]: Starting interpretation [2019-09-20 17:19:26,864 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-09-20 17:19:26,931 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 1 for LOIs [2019-09-20 17:19:27,761 WARN L191 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 25 [2019-09-20 17:19:28,226 WARN L191 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 30 [2019-09-20 17:19:28,394 WARN L191 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 29 [2019-09-20 17:19:28,727 WARN L191 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 33 [2019-09-20 17:19:29,247 WARN L191 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2019-09-20 17:19:29,418 WARN L191 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2019-09-20 17:19:29,543 WARN L191 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 39 [2019-09-20 17:19:29,747 WARN L191 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 39 [2019-09-20 17:19:29,917 WARN L191 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 45 [2019-09-20 17:19:30,164 WARN L191 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 44 [2019-09-20 17:19:30,288 WARN L191 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 43 [2019-09-20 17:19:30,612 WARN L191 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 48 [2019-09-20 17:19:30,860 WARN L191 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2019-09-20 17:19:31,014 WARN L191 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 49 [2019-09-20 17:19:31,675 WARN L191 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 29 [2019-09-20 17:19:31,848 WARN L191 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 30 [2019-09-20 17:19:32,113 WARN L191 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 29 [2019-09-20 17:19:32,235 WARN L191 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 36 [2019-09-20 17:19:58,857 WARN L191 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 26