/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-crafted/mapavg1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 22:53:24,811 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 22:53:24,814 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 22:53:24,833 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 22:53:24,834 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 22:53:24,836 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 22:53:24,837 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 22:53:24,850 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 22:53:24,852 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 22:53:24,853 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 22:53:24,855 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 22:53:24,857 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 22:53:24,858 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 22:53:24,861 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 22:53:24,864 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 22:53:24,865 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 22:53:24,866 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 22:53:24,869 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 22:53:24,870 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 22:53:24,876 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 22:53:24,879 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 22:53:24,880 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 22:53:24,881 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 22:53:24,882 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 22:53:24,885 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 22:53:24,903 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 22:53:24,922 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 22:53:24,923 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 22:53:24,924 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-23 22:53:24,924 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-23 22:53:24,924 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-23 22:53:24,924 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-23 22:53:24,925 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-23 22:53:24,925 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-23 22:53:24,925 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-23 22:53:24,925 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-23 22:53:24,925 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-23 22:53:24,926 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-23 22:53:24,926 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-23 22:53:24,926 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-23 22:53:24,926 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-23 22:53:24,927 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 22:53:24,927 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 22:53:24,927 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 22:53:24,928 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 22:53:24,928 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 22:53:24,928 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 22:53:24,928 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 22:53:24,928 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 22:53:24,929 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 22:53:24,929 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 22:53:24,929 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 22:53:24,929 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 22:53:24,929 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 22:53:24,930 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 22:53:24,930 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 22:53:24,930 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 22:53:24,930 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 22:53:24,932 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 22:53:24,932 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-23 22:53:24,932 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 22:53:24,933 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 22:53:24,933 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 22:53:24,933 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-23 22:53:25,229 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 22:53:25,247 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 22:53:25,250 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 22:53:25,252 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 22:53:25,252 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 22:53:25,253 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/mapavg1.i [2019-11-23 22:53:25,316 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/65561183b/a9e841a1ea964ebcb36858a6d41cd2f6/FLAG3a9f39127 [2019-11-23 22:53:25,770 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 22:53:25,771 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/mapavg1.i [2019-11-23 22:53:25,777 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/65561183b/a9e841a1ea964ebcb36858a6d41cd2f6/FLAG3a9f39127 [2019-11-23 22:53:26,162 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/65561183b/a9e841a1ea964ebcb36858a6d41cd2f6 [2019-11-23 22:53:26,176 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 22:53:26,178 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 22:53:26,179 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 22:53:26,179 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 22:53:26,183 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 22:53:26,184 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:53:26" (1/1) ... [2019-11-23 22:53:26,187 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d618acc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:53:26, skipping insertion in model container [2019-11-23 22:53:26,187 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:53:26" (1/1) ... [2019-11-23 22:53:26,195 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 22:53:26,220 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 22:53:26,480 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 22:53:26,492 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 22:53:26,538 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 22:53:26,555 INFO L208 MainTranslator]: Completed translation [2019-11-23 22:53:26,555 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:53:26 WrapperNode [2019-11-23 22:53:26,556 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 22:53:26,556 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 22:53:26,557 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 22:53:26,557 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 22:53:26,637 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:53:26" (1/1) ... [2019-11-23 22:53:26,658 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:53:26" (1/1) ... [2019-11-23 22:53:26,689 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 22:53:26,689 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 22:53:26,689 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 22:53:26,689 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 22:53:26,705 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:53:26" (1/1) ... [2019-11-23 22:53:26,706 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:53:26" (1/1) ... [2019-11-23 22:53:26,708 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:53:26" (1/1) ... [2019-11-23 22:53:26,709 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:53:26" (1/1) ... [2019-11-23 22:53:26,715 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:53:26" (1/1) ... [2019-11-23 22:53:26,721 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:53:26" (1/1) ... [2019-11-23 22:53:26,723 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:53:26" (1/1) ... [2019-11-23 22:53:26,726 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 22:53:26,726 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 22:53:26,726 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 22:53:26,726 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 22:53:26,727 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:53:26" (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 [2019-11-23 22:53:26,797 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 22:53:26,799 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 22:53:26,800 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 22:53:26,800 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 22:53:26,800 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 22:53:26,800 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 22:53:27,301 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 22:53:27,302 INFO L284 CfgBuilder]: Removed 15 assume(true) statements. [2019-11-23 22:53:27,303 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:53:27 BoogieIcfgContainer [2019-11-23 22:53:27,303 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 22:53:27,305 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 22:53:27,306 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 22:53:27,309 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 22:53:27,309 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 10:53:26" (1/3) ... [2019-11-23 22:53:27,310 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8e770e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:53:27, skipping insertion in model container [2019-11-23 22:53:27,310 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:53:26" (2/3) ... [2019-11-23 22:53:27,311 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8e770e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:53:27, skipping insertion in model container [2019-11-23 22:53:27,311 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:53:27" (3/3) ... [2019-11-23 22:53:27,313 INFO L109 eAbstractionObserver]: Analyzing ICFG mapavg1.i [2019-11-23 22:53:27,324 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 22:53:27,332 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 22:53:27,342 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 22:53:27,365 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 22:53:27,365 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 22:53:27,365 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 22:53:27,366 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 22:53:27,366 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 22:53:27,366 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 22:53:27,366 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 22:53:27,366 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 22:53:27,379 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states. [2019-11-23 22:53:27,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-23 22:53:27,386 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:53:27,386 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:53:27,387 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:53:27,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:53:27,393 INFO L82 PathProgramCache]: Analyzing trace with hash -977729615, now seen corresponding path program 1 times [2019-11-23 22:53:27,401 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 22:53:27,401 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816680020] [2019-11-23 22:53:27,402 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:53:27,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:53:27,546 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 22:53:27,547 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816680020] [2019-11-23 22:53:27,548 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:53:27,549 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-23 22:53:27,550 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631906128] [2019-11-23 22:53:27,555 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 22:53:27,556 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 22:53:27,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 22:53:27,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 22:53:27,569 INFO L87 Difference]: Start difference. First operand 11 states. Second operand 3 states. [2019-11-23 22:53:27,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:53:27,604 INFO L93 Difference]: Finished difference Result 21 states and 31 transitions. [2019-11-23 22:53:27,604 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 22:53:27,606 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2019-11-23 22:53:27,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:53:27,616 INFO L225 Difference]: With dead ends: 21 [2019-11-23 22:53:27,616 INFO L226 Difference]: Without dead ends: 10 [2019-11-23 22:53:27,619 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 22:53:27,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2019-11-23 22:53:27,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2019-11-23 22:53:27,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2019-11-23 22:53:27,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 14 transitions. [2019-11-23 22:53:27,654 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 14 transitions. Word has length 8 [2019-11-23 22:53:27,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:53:27,654 INFO L462 AbstractCegarLoop]: Abstraction has 10 states and 14 transitions. [2019-11-23 22:53:27,655 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 22:53:27,655 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 14 transitions. [2019-11-23 22:53:27,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-23 22:53:27,655 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:53:27,655 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:53:27,656 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:53:27,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:53:27,656 INFO L82 PathProgramCache]: Analyzing trace with hash 1165895748, now seen corresponding path program 1 times [2019-11-23 22:53:27,657 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 22:53:27,657 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823675042] [2019-11-23 22:53:27,657 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:53:27,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:53:27,728 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 22:53:27,728 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823675042] [2019-11-23 22:53:27,728 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284337343] [2019-11-23 22:53:27,729 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 22:53:27,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:53:27,790 INFO L255 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-23 22:53:27,796 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:53:27,824 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 22:53:27,824 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-23 22:53:27,843 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 22:53:27,844 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:53:27,845 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [3] total 6 [2019-11-23 22:53:27,846 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650577829] [2019-11-23 22:53:27,847 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 22:53:27,848 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 22:53:27,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 22:53:27,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-23 22:53:27,848 INFO L87 Difference]: Start difference. First operand 10 states and 14 transitions. Second operand 4 states. [2019-11-23 22:53:27,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:53:27,922 INFO L93 Difference]: Finished difference Result 22 states and 34 transitions. [2019-11-23 22:53:27,922 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 22:53:27,923 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2019-11-23 22:53:27,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:53:27,923 INFO L225 Difference]: With dead ends: 22 [2019-11-23 22:53:27,924 INFO L226 Difference]: Without dead ends: 16 [2019-11-23 22:53:27,925 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-23 22:53:27,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-11-23 22:53:27,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2019-11-23 22:53:27,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-11-23 22:53:27,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 20 transitions. [2019-11-23 22:53:27,931 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 20 transitions. Word has length 9 [2019-11-23 22:53:27,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:53:27,932 INFO L462 AbstractCegarLoop]: Abstraction has 16 states and 20 transitions. [2019-11-23 22:53:27,933 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 22:53:27,933 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 20 transitions. [2019-11-23 22:53:27,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-23 22:53:27,935 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:53:27,935 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:53:28,135 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:53:28,136 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:53:28,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:53:28,138 INFO L82 PathProgramCache]: Analyzing trace with hash 1510942468, now seen corresponding path program 1 times [2019-11-23 22:53:28,138 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 22:53:28,139 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239326431] [2019-11-23 22:53:28,139 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:53:28,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:53:28,227 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-11-23 22:53:28,228 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239326431] [2019-11-23 22:53:28,228 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905278574] [2019-11-23 22:53:28,228 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 22:53:28,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:53:28,291 INFO L255 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-23 22:53:28,293 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:53:28,302 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-23 22:53:28,302 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-23 22:53:28,314 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-23 22:53:28,315 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:53:28,315 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [3] total 6 [2019-11-23 22:53:28,315 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442306054] [2019-11-23 22:53:28,316 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 22:53:28,316 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 22:53:28,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 22:53:28,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-23 22:53:28,317 INFO L87 Difference]: Start difference. First operand 16 states and 20 transitions. Second operand 4 states. [2019-11-23 22:53:28,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:53:28,334 INFO L93 Difference]: Finished difference Result 24 states and 30 transitions. [2019-11-23 22:53:28,334 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 22:53:28,335 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2019-11-23 22:53:28,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:53:28,335 INFO L225 Difference]: With dead ends: 24 [2019-11-23 22:53:28,336 INFO L226 Difference]: Without dead ends: 18 [2019-11-23 22:53:28,336 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-23 22:53:28,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-11-23 22:53:28,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2019-11-23 22:53:28,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-11-23 22:53:28,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2019-11-23 22:53:28,342 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 15 [2019-11-23 22:53:28,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:53:28,342 INFO L462 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2019-11-23 22:53:28,343 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 22:53:28,343 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2019-11-23 22:53:28,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-23 22:53:28,343 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:53:28,344 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:53:28,544 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:53:28,545 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:53:28,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:53:28,546 INFO L82 PathProgramCache]: Analyzing trace with hash -1316778556, now seen corresponding path program 1 times [2019-11-23 22:53:28,546 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 22:53:28,547 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998341261] [2019-11-23 22:53:28,548 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:53:28,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:53:28,613 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-23 22:53:28,614 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998341261] [2019-11-23 22:53:28,614 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309306012] [2019-11-23 22:53:28,614 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:53:28,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:53:28,679 INFO L255 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 22:53:28,682 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:53:28,690 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-23 22:53:28,690 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-23 22:53:28,721 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-23 22:53:28,722 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1318724931] [2019-11-23 22:53:28,776 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2019-11-23 22:53:28,779 INFO L166 IcfgInterpreter]: Building call graph [2019-11-23 22:53:28,786 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-23 22:53:28,793 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-23 22:53:28,795 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-23 22:53:45,681 WARN L192 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 210 DAG size of output: 209 [2019-11-23 22:53:49,856 WARN L192 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 225 [2019-11-23 22:54:16,293 WARN L192 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 293 DAG size of output: 290 [2019-11-23 22:54:24,897 WARN L192 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 304 DAG size of output: 302 [2019-11-23 22:54:34,878 WARN L192 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 328 DAG size of output: 325 [2019-11-23 22:54:34,995 WARN L192 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 326 DAG size of output: 321 [2019-11-23 22:54:35,218 WARN L192 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 323 DAG size of output: 322 [2019-11-23 22:54:35,459 WARN L192 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 326 DAG size of output: 326 [2019-11-23 22:54:37,891 WARN L192 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 330 [2019-11-23 22:54:38,030 WARN L192 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 331 DAG size of output: 330 [2019-11-23 22:54:40,947 WARN L192 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 333 [2019-11-23 22:54:41,103 WARN L192 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 334 DAG size of output: 333 [2019-11-23 22:54:43,550 WARN L192 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 343 DAG size of output: 340 [2019-11-23 22:54:43,666 WARN L192 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 341 DAG size of output: 337 [2019-11-23 22:54:46,227 WARN L192 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 341 [2019-11-23 22:54:46,351 WARN L192 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 342 DAG size of output: 340 [2019-11-23 22:54:46,581 WARN L192 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 343 DAG size of output: 343 [2019-11-23 22:54:49,059 WARN L192 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 347 [2019-11-23 22:54:49,182 WARN L192 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 348 DAG size of output: 347 [2019-11-23 22:54:51,688 WARN L192 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 350 [2019-11-23 22:54:51,820 WARN L192 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 351 DAG size of output: 350 [2019-11-23 22:54:54,394 WARN L192 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 360 DAG size of output: 358 [2019-11-23 22:54:54,532 WARN L192 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 359 DAG size of output: 354 [2019-11-23 22:54:57,249 WARN L192 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 358 [2019-11-23 22:54:57,387 WARN L192 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 359 DAG size of output: 355 [2019-11-23 22:54:57,521 WARN L192 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 355 [2019-11-23 22:54:57,640 WARN L192 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 356 DAG size of output: 356