/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_05.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 23:15:49,847 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 23:15:49,849 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 23:15:49,861 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 23:15:49,862 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 23:15:49,863 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 23:15:49,864 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 23:15:49,866 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 23:15:49,868 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 23:15:49,868 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 23:15:49,869 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 23:15:49,870 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 23:15:49,871 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 23:15:49,872 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 23:15:49,872 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 23:15:49,874 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 23:15:49,874 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 23:15:49,875 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 23:15:49,877 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 23:15:49,879 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 23:15:49,880 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 23:15:49,881 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 23:15:49,882 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 23:15:49,883 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 23:15:49,885 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-23 23:15:49,885 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-23 23:15:49,886 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-23 23:15:49,886 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-23 23:15:49,887 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-23 23:15:49,888 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-23 23:15:49,888 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-23 23:15:49,888 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-23 23:15:49,889 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-23 23:15:49,890 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-23 23:15:49,891 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-23 23:15:49,891 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-23 23:15:49,892 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-23 23:15:49,892 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-23 23:15:49,892 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 23:15:49,893 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 23:15:49,894 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 23:15:49,894 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 23:15:49,909 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 23:15:49,910 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 23:15:49,911 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-23 23:15:49,911 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-23 23:15:49,911 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-23 23:15:49,911 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-23 23:15:49,911 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-23 23:15:49,912 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-23 23:15:49,912 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-23 23:15:49,912 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-23 23:15:49,912 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-23 23:15:49,912 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-23 23:15:49,913 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-23 23:15:49,913 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-23 23:15:49,913 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-23 23:15:49,914 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 23:15:49,914 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 23:15:49,914 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 23:15:49,914 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 23:15:49,914 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 23:15:49,915 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 23:15:49,915 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 23:15:49,915 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 23:15:49,915 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 23:15:49,915 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 23:15:49,916 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 23:15:49,916 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 23:15:49,916 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 23:15:49,916 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 23:15:49,916 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 23:15:49,917 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 23:15:49,917 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 23:15:49,917 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 23:15:49,917 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-23 23:15:49,917 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 23:15:49,918 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 23:15:49,918 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 23:15:49,918 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-23 23:15:50,197 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 23:15:50,214 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 23:15:50,218 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 23:15:50,220 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 23:15:50,220 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 23:15:50,221 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_two_index_05.i [2019-11-23 23:15:50,279 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c42bf46bc/ef6bf1b60e0a486d9d5378f92ecda855/FLAG432204d40 [2019-11-23 23:15:50,710 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 23:15:50,711 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_two_index_05.i [2019-11-23 23:15:50,719 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c42bf46bc/ef6bf1b60e0a486d9d5378f92ecda855/FLAG432204d40 [2019-11-23 23:15:51,079 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c42bf46bc/ef6bf1b60e0a486d9d5378f92ecda855 [2019-11-23 23:15:51,090 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 23:15:51,091 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 23:15:51,092 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 23:15:51,092 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 23:15:51,096 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 23:15:51,097 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 11:15:51" (1/1) ... [2019-11-23 23:15:51,100 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@42c94755 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:15:51, skipping insertion in model container [2019-11-23 23:15:51,100 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 11:15:51" (1/1) ... [2019-11-23 23:15:51,108 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 23:15:51,129 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 23:15:51,350 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 23:15:51,357 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 23:15:51,386 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 23:15:51,409 INFO L208 MainTranslator]: Completed translation [2019-11-23 23:15:51,410 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:15:51 WrapperNode [2019-11-23 23:15:51,410 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 23:15:51,411 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 23:15:51,411 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 23:15:51,412 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 23:15:51,421 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:15:51" (1/1) ... [2019-11-23 23:15:51,511 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:15:51" (1/1) ... [2019-11-23 23:15:51,538 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 23:15:51,539 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 23:15:51,539 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 23:15:51,539 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 23:15:51,548 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:15:51" (1/1) ... [2019-11-23 23:15:51,549 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:15:51" (1/1) ... [2019-11-23 23:15:51,556 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:15:51" (1/1) ... [2019-11-23 23:15:51,557 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:15:51" (1/1) ... [2019-11-23 23:15:51,562 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:15:51" (1/1) ... [2019-11-23 23:15:51,567 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:15:51" (1/1) ... [2019-11-23 23:15:51,568 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:15:51" (1/1) ... [2019-11-23 23:15:51,570 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 23:15:51,571 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 23:15:51,571 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 23:15:51,571 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 23:15:51,572 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:15:51" (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 23:15:51,621 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 23:15:51,621 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 23:15:51,622 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 23:15:51,622 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 23:15:51,622 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 23:15:51,622 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 23:15:51,956 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 23:15:51,957 INFO L284 CfgBuilder]: Removed 9 assume(true) statements. [2019-11-23 23:15:51,958 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 11:15:51 BoogieIcfgContainer [2019-11-23 23:15:51,958 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 23:15:51,959 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 23:15:51,959 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 23:15:51,962 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 23:15:51,963 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 11:15:51" (1/3) ... [2019-11-23 23:15:51,964 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59641f0a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 11:15:51, skipping insertion in model container [2019-11-23 23:15:51,964 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:15:51" (2/3) ... [2019-11-23 23:15:51,964 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59641f0a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 11:15:51, skipping insertion in model container [2019-11-23 23:15:51,964 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 11:15:51" (3/3) ... [2019-11-23 23:15:51,966 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_two_index_05.i [2019-11-23 23:15:51,976 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 23:15:51,983 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 23:15:51,995 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 23:15:52,016 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 23:15:52,016 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 23:15:52,016 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 23:15:52,016 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 23:15:52,017 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 23:15:52,017 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 23:15:52,017 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 23:15:52,017 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 23:15:52,028 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states. [2019-11-23 23:15:52,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-11-23 23:15:52,033 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:15:52,034 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-11-23 23:15:52,034 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:15:52,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:15:52,039 INFO L82 PathProgramCache]: Analyzing trace with hash -1744254828, now seen corresponding path program 1 times [2019-11-23 23:15:52,046 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:15:52,047 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298726055] [2019-11-23 23:15:52,047 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:15:52,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:15:52,196 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 23:15:52,196 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298726055] [2019-11-23 23:15:52,197 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 23:15:52,198 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-23 23:15:52,198 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138533773] [2019-11-23 23:15:52,203 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 23:15:52,203 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 23:15:52,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 23:15:52,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 23:15:52,216 INFO L87 Difference]: Start difference. First operand 9 states. Second operand 3 states. [2019-11-23 23:15:52,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 23:15:52,271 INFO L93 Difference]: Finished difference Result 17 states and 23 transitions. [2019-11-23 23:15:52,272 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 23:15:52,273 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2019-11-23 23:15:52,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 23:15:52,281 INFO L225 Difference]: With dead ends: 17 [2019-11-23 23:15:52,281 INFO L226 Difference]: Without dead ends: 9 [2019-11-23 23:15:52,285 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 23:15:52,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2019-11-23 23:15:52,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2019-11-23 23:15:52,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2019-11-23 23:15:52,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 11 transitions. [2019-11-23 23:15:52,313 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 11 transitions. Word has length 6 [2019-11-23 23:15:52,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 23:15:52,313 INFO L462 AbstractCegarLoop]: Abstraction has 9 states and 11 transitions. [2019-11-23 23:15:52,313 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 23:15:52,314 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 11 transitions. [2019-11-23 23:15:52,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-11-23 23:15:52,314 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:15:52,314 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-11-23 23:15:52,315 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:15:52,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:15:52,315 INFO L82 PathProgramCache]: Analyzing trace with hash 278305911, now seen corresponding path program 1 times [2019-11-23 23:15:52,315 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:15:52,316 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15985428] [2019-11-23 23:15:52,316 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:15:52,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:15:52,396 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 23:15:52,397 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15985428] [2019-11-23 23:15:52,397 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356547223] [2019-11-23 23:15:52,397 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 23:15:52,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:15:52,445 INFO L255 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-23 23:15:52,450 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 23:15:52,467 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 23:15:52,468 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-23 23:15:52,489 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 23:15:52,490 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-23 23:15:52,490 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [3] total 5 [2019-11-23 23:15:52,491 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615797984] [2019-11-23 23:15:52,492 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 23:15:52,493 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 23:15:52,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 23:15:52,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 23:15:52,494 INFO L87 Difference]: Start difference. First operand 9 states and 11 transitions. Second operand 4 states. [2019-11-23 23:15:52,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 23:15:52,548 INFO L93 Difference]: Finished difference Result 24 states and 30 transitions. [2019-11-23 23:15:52,548 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 23:15:52,548 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2019-11-23 23:15:52,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 23:15:52,549 INFO L225 Difference]: With dead ends: 24 [2019-11-23 23:15:52,549 INFO L226 Difference]: Without dead ends: 18 [2019-11-23 23:15:52,551 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 23:15:52,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-11-23 23:15:52,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 12. [2019-11-23 23:15:52,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2019-11-23 23:15:52,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2019-11-23 23:15:52,556 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 7 [2019-11-23 23:15:52,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 23:15:52,556 INFO L462 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2019-11-23 23:15:52,556 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 23:15:52,556 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2019-11-23 23:15:52,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-23 23:15:52,557 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:15:52,557 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2019-11-23 23:15:52,762 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 23:15:52,767 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:15:52,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:15:52,768 INFO L82 PathProgramCache]: Analyzing trace with hash 161324532, now seen corresponding path program 1 times [2019-11-23 23:15:52,768 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:15:52,769 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815612571] [2019-11-23 23:15:52,769 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:15:52,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:15:52,858 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 23:15:52,858 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815612571] [2019-11-23 23:15:52,859 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511412338] [2019-11-23 23:15:52,859 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 23:15:52,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:15:52,923 INFO L255 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 23:15:52,926 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 23:15:52,938 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 23:15:52,938 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-23 23:15:52,977 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 23:15:52,978 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1369996769] [2019-11-23 23:15:53,032 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2019-11-23 23:15:53,033 INFO L166 IcfgInterpreter]: Building call graph [2019-11-23 23:15:53,039 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-23 23:15:53,046 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-23 23:15:53,047 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-23 23:15:54,938 WARN L192 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 135 [2019-11-23 23:15:55,292 WARN L192 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 139 [2019-11-23 23:15:55,544 WARN L192 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 141 [2019-11-23 23:16:02,948 WARN L192 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 184 [2019-11-23 23:16:03,108 WARN L192 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2019-11-23 23:16:03,243 WARN L192 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 187 [2019-11-23 23:16:03,413 WARN L192 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2019-11-23 23:16:03,546 WARN L192 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 191 [2019-11-23 23:16:25,273 WARN L192 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 260 DAG size of output: 258 [2019-11-23 23:16:28,888 WARN L192 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 273 [2019-11-23 23:16:30,653 WARN L192 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 293 DAG size of output: 292 [2019-11-23 23:16:30,790 WARN L192 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 293 DAG size of output: 290 [2019-11-23 23:16:34,702 WARN L192 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 300 DAG size of output: 298 [2019-11-23 23:16:34,820 WARN L192 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 299 DAG size of output: 297 [2019-11-23 23:16:37,437 WARN L192 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 300 [2019-11-23 23:16:37,555 WARN L192 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 301 DAG size of output: 298 [2019-11-23 23:16:37,793 WARN L192 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 300 DAG size of output: 299 [2019-11-23 23:16:38,022 WARN L192 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 303 DAG size of output: 302 [2019-11-23 23:16:38,246 WARN L192 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 306 DAG size of output: 306 [2019-11-23 23:16:40,427 WARN L192 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 310 [2019-11-23 23:16:40,536 WARN L192 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 311 DAG size of output: 310 [2019-11-23 23:16:42,691 WARN L192 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 313 [2019-11-23 23:16:42,804 WARN L192 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 314 DAG size of output: 313 [2019-11-23 23:16:44,897 WARN L192 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 318 DAG size of output: 316 [2019-11-23 23:16:45,027 WARN L192 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 317 DAG size of output: 316 [2019-11-23 23:16:47,120 WARN L192 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 324 DAG size of output: 322 [2019-11-23 23:16:47,240 WARN L192 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 323 DAG size of output: 320 [2019-11-23 23:16:49,472 WARN L192 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 331 DAG size of output: 325 [2019-11-23 23:16:49,605 WARN L192 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 325 DAG size of output: 323 [2019-11-23 23:16:51,898 WARN L192 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 327 [2019-11-23 23:16:52,035 WARN L192 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 328 DAG size of output: 326 [2019-11-23 23:16:52,163 WARN L192 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 328 [2019-11-23 23:16:52,279 WARN L192 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 329 DAG size of output: 329 [2019-11-23 23:16:54,686 WARN L192 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 333 [2019-11-23 23:16:54,823 WARN L192 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 334 DAG size of output: 332 [2019-11-23 23:16:54,984 WARN L192 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 334 [2019-11-23 23:16:55,109 WARN L192 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 335 DAG size of output: 335 [2019-11-23 23:16:57,903 WARN L192 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 339 [2019-11-23 23:16:58,038 WARN L192 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 340 DAG size of output: 340 [2019-11-23 23:17:00,535 WARN L192 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 350 DAG size of output: 349 [2019-11-23 23:17:00,683 WARN L192 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 350 DAG size of output: 344 [2019-11-23 23:17:03,403 WARN L192 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 347 [2019-11-23 23:17:03,564 WARN L192 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 348 DAG size of output: 344 [2019-11-23 23:17:03,716 WARN L192 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 344 [2019-11-23 23:17:03,850 WARN L192 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 345 DAG size of output: 344 [2019-11-23 23:17:03,985 WARN L192 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 347 [2019-11-23 23:17:04,114 WARN L192 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 348 DAG size of output: 346 [2019-11-23 23:17:04,259 WARN L192 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 348 [2019-11-23 23:17:04,423 WARN L192 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 349 DAG size of output: 349 [2019-11-23 23:17:07,143 WARN L192 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 353 [2019-11-23 23:17:07,299 WARN L192 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 354 DAG size of output: 354 [2019-11-23 23:17:10,247 WARN L192 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 362 DAG size of output: 361 [2019-11-23 23:17:10,427 WARN L192 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 362 DAG size of output: 356 [2019-11-23 23:17:10,565 WARN L192 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 357 [2019-11-23 23:17:10,698 WARN L192 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 358 DAG size of output: 358 [2019-11-23 23:17:13,412 WARN L192 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 362 [2019-11-23 23:17:13,555 WARN L192 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 363 DAG size of output: 363 [2019-11-23 23:17:16,829 WARN L192 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 367 [2019-11-23 23:17:16,981 WARN L192 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 368 DAG size of output: 366 [2019-11-23 23:17:19,786 WARN L192 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 368 [2019-11-23 23:17:19,933 WARN L192 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 369 DAG size of output: 369