/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/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -i ../../../trunk/examples/svcomp/array-examples/standard_two_index_04.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 23:15:45,257 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 23:15:45,260 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 23:15:45,278 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 23:15:45,278 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 23:15:45,280 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 23:15:45,282 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 23:15:45,294 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 23:15:45,296 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 23:15:45,298 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 23:15:45,300 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 23:15:45,301 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 23:15:45,302 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 23:15:45,303 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 23:15:45,305 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 23:15:45,306 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 23:15:45,307 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 23:15:45,309 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 23:15:45,311 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 23:15:45,313 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 23:15:45,314 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 23:15:45,315 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 23:15:45,316 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 23:15:45,316 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 23:15:45,318 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-23 23:15:45,319 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-23 23:15:45,319 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-23 23:15:45,320 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-23 23:15:45,320 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-23 23:15:45,322 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-23 23:15:45,323 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-23 23:15:45,323 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-23 23:15:45,325 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-23 23:15:45,325 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-23 23:15:45,326 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-23 23:15:45,326 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-23 23:15:45,327 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-23 23:15:45,327 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-23 23:15:45,327 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 23:15:45,328 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 23:15:45,331 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 23:15:45,332 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 [2019-11-23 23:15:45,352 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 23:15:45,353 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 23:15:45,353 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-23 23:15:45,354 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-23 23:15:45,354 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-23 23:15:45,354 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-23 23:15:45,354 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-23 23:15:45,354 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-23 23:15:45,355 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-23 23:15:45,355 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-23 23:15:45,355 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-23 23:15:45,355 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-23 23:15:45,356 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-23 23:15:45,356 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-23 23:15:45,356 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-23 23:15:45,357 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 23:15:45,357 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 23:15:45,357 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 23:15:45,357 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 23:15:45,357 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 23:15:45,358 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 23:15:45,358 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 23:15:45,358 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 23:15:45,358 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 23:15:45,358 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 23:15:45,359 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 23:15:45,359 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 23:15:45,359 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 23:15:45,359 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 23:15:45,359 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 23:15:45,360 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 23:15:45,360 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 23:15:45,361 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 23:15:45,361 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-23 23:15:45,361 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 23:15:45,362 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 23:15:45,362 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 23:15:45,362 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-23 23:15:45,647 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 23:15:45,660 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 23:15:45,664 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 23:15:45,666 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 23:15:45,666 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 23:15:45,667 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_two_index_04.i [2019-11-23 23:15:45,729 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/529c86b4d/d3efd4d21b3244ed914b86d648e9ead0/FLAGb5af07640 [2019-11-23 23:15:46,193 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 23:15:46,194 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_two_index_04.i [2019-11-23 23:15:46,200 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/529c86b4d/d3efd4d21b3244ed914b86d648e9ead0/FLAGb5af07640 [2019-11-23 23:15:46,608 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/529c86b4d/d3efd4d21b3244ed914b86d648e9ead0 [2019-11-23 23:15:46,616 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 23:15:46,618 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 23:15:46,619 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 23:15:46,619 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 23:15:46,624 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 23:15:46,625 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 11:15:46" (1/1) ... [2019-11-23 23:15:46,628 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@238d9c25 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:15:46, skipping insertion in model container [2019-11-23 23:15:46,628 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 11:15:46" (1/1) ... [2019-11-23 23:15:46,636 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 23:15:46,658 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 23:15:46,842 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 23:15:46,846 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 23:15:46,865 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 23:15:46,886 INFO L208 MainTranslator]: Completed translation [2019-11-23 23:15:46,887 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:15:46 WrapperNode [2019-11-23 23:15:46,887 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 23:15:46,888 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 23:15:46,888 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 23:15:46,888 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 23:15:46,897 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:15:46" (1/1) ... [2019-11-23 23:15:46,997 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:15:46" (1/1) ... [2019-11-23 23:15:47,022 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 23:15:47,022 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 23:15:47,022 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 23:15:47,023 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 23:15:47,029 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:15:46" (1/1) ... [2019-11-23 23:15:47,030 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:15:46" (1/1) ... [2019-11-23 23:15:47,040 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:15:46" (1/1) ... [2019-11-23 23:15:47,040 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:15:46" (1/1) ... [2019-11-23 23:15:47,050 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:15:46" (1/1) ... [2019-11-23 23:15:47,061 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:15:46" (1/1) ... [2019-11-23 23:15:47,063 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:15:46" (1/1) ... [2019-11-23 23:15:47,065 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 23:15:47,065 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 23:15:47,065 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 23:15:47,066 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 23:15:47,067 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:15:46" (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 [2019-11-23 23:15:47,118 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 23:15:47,118 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 23:15:47,119 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 23:15:47,119 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 23:15:47,119 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 23:15:47,119 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 23:15:47,454 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 23:15:47,454 INFO L284 CfgBuilder]: Removed 9 assume(true) statements. [2019-11-23 23:15:47,456 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 11:15:47 BoogieIcfgContainer [2019-11-23 23:15:47,456 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 23:15:47,457 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 23:15:47,457 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 23:15:47,460 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 23:15:47,461 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 11:15:46" (1/3) ... [2019-11-23 23:15:47,461 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70f0320d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 11:15:47, skipping insertion in model container [2019-11-23 23:15:47,462 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:15:46" (2/3) ... [2019-11-23 23:15:47,462 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70f0320d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 11:15:47, skipping insertion in model container [2019-11-23 23:15:47,462 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 11:15:47" (3/3) ... [2019-11-23 23:15:47,464 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_two_index_04.i [2019-11-23 23:15:47,474 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 23:15:47,488 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 23:15:47,505 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 23:15:47,524 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 23:15:47,525 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 23:15:47,525 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 23:15:47,525 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 23:15:47,525 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 23:15:47,525 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 23:15:47,525 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 23:15:47,525 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 23:15:47,536 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states. [2019-11-23 23:15:47,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-11-23 23:15:47,542 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:15:47,543 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-11-23 23:15:47,544 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:15:47,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:15:47,550 INFO L82 PathProgramCache]: Analyzing trace with hash -1744254828, now seen corresponding path program 1 times [2019-11-23 23:15:47,557 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:15:47,557 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632139797] [2019-11-23 23:15:47,558 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:15:47,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:15:47,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 23:15:47,696 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632139797] [2019-11-23 23:15:47,697 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 23:15:47,697 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-23 23:15:47,698 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174121992] [2019-11-23 23:15:47,703 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 23:15:47,704 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 23:15:47,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 23:15:47,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 23:15:47,720 INFO L87 Difference]: Start difference. First operand 9 states. Second operand 3 states. [2019-11-23 23:15:47,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 23:15:47,768 INFO L93 Difference]: Finished difference Result 17 states and 23 transitions. [2019-11-23 23:15:47,775 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 23:15:47,777 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2019-11-23 23:15:47,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 23:15:47,790 INFO L225 Difference]: With dead ends: 17 [2019-11-23 23:15:47,790 INFO L226 Difference]: Without dead ends: 9 [2019-11-23 23:15:47,798 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 23:15:47,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2019-11-23 23:15:47,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2019-11-23 23:15:47,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2019-11-23 23:15:47,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 11 transitions. [2019-11-23 23:15:47,829 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 11 transitions. Word has length 6 [2019-11-23 23:15:47,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 23:15:47,830 INFO L462 AbstractCegarLoop]: Abstraction has 9 states and 11 transitions. [2019-11-23 23:15:47,830 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 23:15:47,830 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 11 transitions. [2019-11-23 23:15:47,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-11-23 23:15:47,831 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:15:47,831 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-11-23 23:15:47,832 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:15:47,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:15:47,832 INFO L82 PathProgramCache]: Analyzing trace with hash 278305911, now seen corresponding path program 1 times [2019-11-23 23:15:47,833 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:15:47,833 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582263862] [2019-11-23 23:15:47,833 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:15:47,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:15:47,912 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 23:15:47,913 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582263862] [2019-11-23 23:15:47,913 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856767342] [2019-11-23 23:15:47,913 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 23:15:47,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:15:47,957 INFO L255 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-23 23:15:47,962 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 23:15:47,978 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 23:15:47,978 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-23 23:15:47,998 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 23:15:47,998 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-23 23:15:47,998 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [3] total 5 [2019-11-23 23:15:48,000 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487158440] [2019-11-23 23:15:48,001 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 23:15:48,001 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 23:15:48,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 23:15:48,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 23:15:48,002 INFO L87 Difference]: Start difference. First operand 9 states and 11 transitions. Second operand 4 states. [2019-11-23 23:15:48,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 23:15:48,047 INFO L93 Difference]: Finished difference Result 24 states and 30 transitions. [2019-11-23 23:15:48,047 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 23:15:48,047 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2019-11-23 23:15:48,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 23:15:48,048 INFO L225 Difference]: With dead ends: 24 [2019-11-23 23:15:48,048 INFO L226 Difference]: Without dead ends: 18 [2019-11-23 23:15:48,049 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 23:15:48,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-11-23 23:15:48,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 12. [2019-11-23 23:15:48,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2019-11-23 23:15:48,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2019-11-23 23:15:48,054 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 7 [2019-11-23 23:15:48,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 23:15:48,055 INFO L462 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2019-11-23 23:15:48,055 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 23:15:48,055 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2019-11-23 23:15:48,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-23 23:15:48,056 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:15:48,056 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2019-11-23 23:15:48,258 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 23:15:48,259 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:15:48,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:15:48,260 INFO L82 PathProgramCache]: Analyzing trace with hash 161324532, now seen corresponding path program 1 times [2019-11-23 23:15:48,260 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:15:48,261 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314081592] [2019-11-23 23:15:48,262 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:15:48,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:15:48,361 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-23 23:15:48,361 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314081592] [2019-11-23 23:15:48,361 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140793299] [2019-11-23 23:15:48,362 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 23:15:48,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:15:48,412 INFO L255 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 23:15:48,414 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 23:15:48,424 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-23 23:15:48,424 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-23 23:15:48,462 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-23 23:15:48,463 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1342380998] [2019-11-23 23:15:48,515 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2019-11-23 23:15:48,516 INFO L166 IcfgInterpreter]: Building call graph [2019-11-23 23:15:48,522 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-23 23:15:48,529 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-23 23:15:48,530 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-23 23:15:50,832 WARN L192 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 139 [2019-11-23 23:15:58,181 WARN L192 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2019-11-23 23:15:58,325 WARN L192 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 186 DAG size of output: 183 [2019-11-23 23:15:58,767 WARN L192 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 187 [2019-11-23 23:15:58,922 WARN L192 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2019-11-23 23:16:18,667 WARN L192 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 262 DAG size of output: 260 [2019-11-23 23:16:18,796 WARN L192 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 262 [2019-11-23 23:16:22,265 WARN L192 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 275 DAG size of output: 273 [2019-11-23 23:16:23,974 WARN L192 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 275 DAG size of output: 273 [2019-11-23 23:16:25,840 WARN L192 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 283 DAG size of output: 278 [2019-11-23 23:16:25,963 WARN L192 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 279 DAG size of output: 277 [2019-11-23 23:16:27,801 WARN L192 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 287 DAG size of output: 283 [2019-11-23 23:16:27,916 WARN L192 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 284 DAG size of output: 280 [2019-11-23 23:16:28,265 WARN L192 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 281 [2019-11-23 23:16:30,479 WARN L192 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 287 DAG size of output: 287 [2019-11-23 23:16:32,694 WARN L192 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 292 DAG size of output: 290 [2019-11-23 23:16:34,851 WARN L192 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 293 DAG size of output: 293 [2019-11-23 23:16:36,770 WARN L192 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 302 DAG size of output: 299 [2019-11-23 23:16:36,899 WARN L192 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 300 DAG size of output: 295 [2019-11-23 23:16:37,029 WARN L192 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 296 [2019-11-23 23:16:41,685 WARN L192 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 304 [2019-11-23 23:16:41,794 WARN L192 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 305 DAG size of output: 305 [2019-11-23 23:16:43,936 WARN L192 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 309 [2019-11-23 23:16:44,053 WARN L192 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 310 DAG size of output: 309 [2019-11-23 23:16:46,198 WARN L192 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 318 DAG size of output: 314 [2019-11-23 23:16:46,337 WARN L192 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 315 DAG size of output: 311 [2019-11-23 23:16:46,468 WARN L192 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 313 [2019-11-23 23:16:46,587 WARN L192 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 314 DAG size of output: 314 [2019-11-23 23:16:48,894 WARN L192 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 318 [2019-11-23 23:16:49,021 WARN L192 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 319 DAG size of output: 319 [2019-11-23 23:16:51,452 WARN L192 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 323 [2019-11-23 23:16:51,601 WARN L192 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 324 DAG size of output: 324 [2019-11-23 23:16:53,866 WARN L192 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 332 DAG size of output: 328 [2019-11-23 23:16:54,023 WARN L192 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 329 DAG size of output: 325 [2019-11-23 23:16:54,156 WARN L192 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 325 [2019-11-23 23:16:54,270 WARN L192 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 326 DAG size of output: 326 [2019-11-23 23:16:56,624 WARN L192 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 330 [2019-11-23 23:16:56,753 WARN L192 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 331 DAG size of output: 330 [2019-11-23 23:16:59,203 WARN L192 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 333 [2019-11-23 23:16:59,335 WARN L192 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 334 DAG size of output: 333 [2019-11-23 23:17:02,165 WARN L192 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 336 [2019-11-23 23:17:02,300 WARN L192 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 337 DAG size of output: 336 [2019-11-23 23:17:04,708 WARN L192 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 345 DAG size of output: 343 [2019-11-23 23:17:04,852 WARN L192 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 344 DAG size of output: 339 [2019-11-23 23:17:07,463 WARN L192 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 348 DAG size of output: 345 [2019-11-23 23:17:07,606 WARN L192 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 346 DAG size of output: 343 [2019-11-23 23:17:10,131 WARN L192 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 352 DAG size of output: 349 [2019-11-23 23:17:10,285 WARN L192 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 350 DAG size of output: 345 [2019-11-23 23:17:10,430 WARN L192 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 346 [2019-11-23 23:17:10,583 WARN L192 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 347 DAG size of output: 346 [2019-11-23 23:17:10,723 WARN L192 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 349 [2019-11-23 23:17:10,856 WARN L192 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 350 DAG size of output: 348 [2019-11-23 23:17:11,001 WARN L192 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 350 [2019-11-23 23:17:11,136 WARN L192 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 351 DAG size of output: 351 [2019-11-23 23:17:13,945 WARN L192 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 355 [2019-11-23 23:17:14,102 WARN L192 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 356 DAG size of output: 354 [2019-11-23 23:17:14,265 WARN L192 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 356 [2019-11-23 23:17:14,392 WARN L192 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 357 DAG size of output: 357 [2019-11-23 23:17:17,313 WARN L192 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 361 [2019-11-23 23:17:17,456 WARN L192 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 362 DAG size of output: 362