/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/zero_sum_const4.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 22:58:07,351 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 22:58:07,354 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 22:58:07,371 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 22:58:07,372 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 22:58:07,374 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 22:58:07,376 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 22:58:07,388 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 22:58:07,390 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 22:58:07,391 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 22:58:07,392 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 22:58:07,394 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 22:58:07,394 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 22:58:07,397 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 22:58:07,400 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 22:58:07,402 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 22:58:07,404 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 22:58:07,406 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 22:58:07,408 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 22:58:07,414 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 22:58:07,417 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 22:58:07,420 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 22:58:07,422 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 22:58:07,423 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 22:58:07,426 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 22:58:07,437 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 22:58:07,439 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 22:58:07,440 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 22:58:07,441 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 22:58:07,459 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 22:58:07,459 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 22:58:07,460 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-23 22:58:07,460 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-23 22:58:07,461 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-23 22:58:07,461 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-23 22:58:07,461 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-23 22:58:07,461 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-23 22:58:07,461 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-23 22:58:07,461 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-23 22:58:07,463 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-23 22:58:07,463 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-23 22:58:07,463 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-23 22:58:07,464 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-23 22:58:07,464 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-23 22:58:07,464 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 22:58:07,465 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 22:58:07,465 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 22:58:07,465 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 22:58:07,465 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 22:58:07,465 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 22:58:07,466 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 22:58:07,466 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 22:58:07,466 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 22:58:07,466 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 22:58:07,466 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 22:58:07,467 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 22:58:07,467 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 22:58:07,468 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 22:58:07,468 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 22:58:07,468 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 22:58:07,469 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 22:58:07,469 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 22:58:07,469 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-23 22:58:07,469 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 22:58:07,470 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 22:58:07,470 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 22:58:07,470 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-23 22:58:07,725 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 22:58:07,744 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 22:58:07,747 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 22:58:07,748 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 22:58:07,749 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 22:58:07,749 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/zero_sum_const4.c [2019-11-23 22:58:07,826 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/47a0c9f49/e5206f9edd8341f6a7157e2805b8f90b/FLAG312b9a4f1 [2019-11-23 22:58:08,264 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 22:58:08,264 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/zero_sum_const4.c [2019-11-23 22:58:08,276 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/47a0c9f49/e5206f9edd8341f6a7157e2805b8f90b/FLAG312b9a4f1 [2019-11-23 22:58:08,644 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/47a0c9f49/e5206f9edd8341f6a7157e2805b8f90b [2019-11-23 22:58:08,652 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 22:58:08,654 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 22:58:08,655 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 22:58:08,655 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 22:58:08,659 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 22:58:08,660 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:58:08" (1/1) ... [2019-11-23 22:58:08,664 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7059378e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:58:08, skipping insertion in model container [2019-11-23 22:58:08,664 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:58:08" (1/1) ... [2019-11-23 22:58:08,676 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 22:58:08,695 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 22:58:08,876 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 22:58:08,887 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 22:58:08,910 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 22:58:08,926 INFO L208 MainTranslator]: Completed translation [2019-11-23 22:58:08,927 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:58:08 WrapperNode [2019-11-23 22:58:08,927 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 22:58:08,928 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 22:58:08,928 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 22:58:08,928 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 22:58:09,013 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:58:08" (1/1) ... [2019-11-23 22:58:09,024 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:58:08" (1/1) ... [2019-11-23 22:58:09,049 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 22:58:09,049 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 22:58:09,049 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 22:58:09,049 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 22:58:09,059 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:58:08" (1/1) ... [2019-11-23 22:58:09,060 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:58:08" (1/1) ... [2019-11-23 22:58:09,062 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:58:08" (1/1) ... [2019-11-23 22:58:09,062 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:58:08" (1/1) ... [2019-11-23 22:58:09,068 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:58:08" (1/1) ... [2019-11-23 22:58:09,075 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:58:08" (1/1) ... [2019-11-23 22:58:09,077 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:58:08" (1/1) ... [2019-11-23 22:58:09,082 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 22:58:09,083 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 22:58:09,083 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 22:58:09,083 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 22:58:09,087 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:58:08" (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 22:58:09,147 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 22:58:09,147 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-23 22:58:09,147 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 22:58:09,147 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 22:58:09,148 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 22:58:09,646 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 22:58:09,647 INFO L284 CfgBuilder]: Removed 15 assume(true) statements. [2019-11-23 22:58:09,648 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:58:09 BoogieIcfgContainer [2019-11-23 22:58:09,648 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 22:58:09,649 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 22:58:09,649 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 22:58:09,652 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 22:58:09,652 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 10:58:08" (1/3) ... [2019-11-23 22:58:09,653 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@316423c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:58:09, skipping insertion in model container [2019-11-23 22:58:09,654 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:58:08" (2/3) ... [2019-11-23 22:58:09,654 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@316423c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:58:09, skipping insertion in model container [2019-11-23 22:58:09,654 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:58:09" (3/3) ... [2019-11-23 22:58:09,656 INFO L109 eAbstractionObserver]: Analyzing ICFG zero_sum_const4.c [2019-11-23 22:58:09,666 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 22:58:09,673 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 22:58:09,683 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 22:58:09,706 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 22:58:09,706 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 22:58:09,706 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 22:58:09,706 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 22:58:09,707 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 22:58:09,707 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 22:58:09,707 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 22:58:09,707 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 22:58:09,722 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states. [2019-11-23 22:58:09,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-23 22:58:09,729 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:58:09,730 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:58:09,730 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:58:09,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:58:09,737 INFO L82 PathProgramCache]: Analyzing trace with hash -1803768331, now seen corresponding path program 1 times [2019-11-23 22:58:09,745 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 22:58:09,746 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439984790] [2019-11-23 22:58:09,746 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:58:09,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:58:09,970 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 22:58:09,972 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439984790] [2019-11-23 22:58:09,973 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:58:09,974 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 22:58:09,975 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882911852] [2019-11-23 22:58:09,981 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 22:58:09,982 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 22:58:09,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 22:58:09,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-23 22:58:10,000 INFO L87 Difference]: Start difference. First operand 16 states. Second operand 4 states. [2019-11-23 22:58:10,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:58:10,103 INFO L93 Difference]: Finished difference Result 33 states and 49 transitions. [2019-11-23 22:58:10,104 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 22:58:10,106 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2019-11-23 22:58:10,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:58:10,116 INFO L225 Difference]: With dead ends: 33 [2019-11-23 22:58:10,119 INFO L226 Difference]: Without dead ends: 22 [2019-11-23 22:58:10,122 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-23 22:58:10,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-11-23 22:58:10,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2019-11-23 22:58:10,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-11-23 22:58:10,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 37 transitions. [2019-11-23 22:58:10,164 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 37 transitions. Word has length 13 [2019-11-23 22:58:10,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:58:10,165 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 37 transitions. [2019-11-23 22:58:10,165 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 22:58:10,165 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 37 transitions. [2019-11-23 22:58:10,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-23 22:58:10,166 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:58:10,166 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:58:10,167 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:58:10,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:58:10,167 INFO L82 PathProgramCache]: Analyzing trace with hash -82978504, now seen corresponding path program 1 times [2019-11-23 22:58:10,168 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 22:58:10,168 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450197568] [2019-11-23 22:58:10,168 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:58:10,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:58:10,243 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 22:58:10,244 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450197568] [2019-11-23 22:58:10,244 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:58:10,244 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 22:58:10,245 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800554329] [2019-11-23 22:58:10,246 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 22:58:10,247 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 22:58:10,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 22:58:10,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 22:58:10,247 INFO L87 Difference]: Start difference. First operand 22 states and 37 transitions. Second operand 3 states. [2019-11-23 22:58:10,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:58:10,290 INFO L93 Difference]: Finished difference Result 42 states and 72 transitions. [2019-11-23 22:58:10,291 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 22:58:10,291 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2019-11-23 22:58:10,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:58:10,292 INFO L225 Difference]: With dead ends: 42 [2019-11-23 22:58:10,292 INFO L226 Difference]: Without dead ends: 23 [2019-11-23 22:58:10,293 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 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 22:58:10,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-11-23 22:58:10,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2019-11-23 22:58:10,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-11-23 22:58:10,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 38 transitions. [2019-11-23 22:58:10,300 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 38 transitions. Word has length 14 [2019-11-23 22:58:10,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:58:10,300 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 38 transitions. [2019-11-23 22:58:10,301 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 22:58:10,301 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 38 transitions. [2019-11-23 22:58:10,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-23 22:58:10,301 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:58:10,302 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:58:10,302 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:58:10,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:58:10,302 INFO L82 PathProgramCache]: Analyzing trace with hash -393873615, now seen corresponding path program 1 times [2019-11-23 22:58:10,303 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 22:58:10,303 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900049916] [2019-11-23 22:58:10,303 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:58:10,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:58:10,353 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-23 22:58:10,354 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900049916] [2019-11-23 22:58:10,354 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:58:10,355 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 22:58:10,355 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133393001] [2019-11-23 22:58:10,355 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 22:58:10,356 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 22:58:10,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 22:58:10,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 22:58:10,357 INFO L87 Difference]: Start difference. First operand 23 states and 38 transitions. Second operand 4 states. [2019-11-23 22:58:10,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:58:10,467 INFO L93 Difference]: Finished difference Result 40 states and 68 transitions. [2019-11-23 22:58:10,467 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 22:58:10,468 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2019-11-23 22:58:10,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:58:10,468 INFO L225 Difference]: With dead ends: 40 [2019-11-23 22:58:10,469 INFO L226 Difference]: Without dead ends: 23 [2019-11-23 22:58:10,469 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 22:58:10,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-11-23 22:58:10,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2019-11-23 22:58:10,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-11-23 22:58:10,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 31 transitions. [2019-11-23 22:58:10,476 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 31 transitions. Word has length 15 [2019-11-23 22:58:10,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:58:10,477 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 31 transitions. [2019-11-23 22:58:10,477 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 22:58:10,477 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 31 transitions. [2019-11-23 22:58:10,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-11-23 22:58:10,478 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:58:10,478 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:58:10,478 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:58:10,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:58:10,479 INFO L82 PathProgramCache]: Analyzing trace with hash -139980124, now seen corresponding path program 1 times [2019-11-23 22:58:10,479 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 22:58:10,479 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945589368] [2019-11-23 22:58:10,480 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:58:10,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:58:10,566 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-11-23 22:58:10,566 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945589368] [2019-11-23 22:58:10,566 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772359824] [2019-11-23 22:58:10,567 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 22:58:10,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:58:10,637 INFO L255 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 22:58:10,644 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:58:10,695 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-11-23 22:58:10,695 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-23 22:58:10,721 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-11-23 22:58:10,722 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2133003519] [2019-11-23 22:58:10,766 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2019-11-23 22:58:10,766 INFO L166 IcfgInterpreter]: Building call graph [2019-11-23 22:58:10,781 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-23 22:58:10,789 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-23 22:58:10,789 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-23 22:58:12,478 WARN L192 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 125 [2019-11-23 22:58:12,604 WARN L192 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 125 [2019-11-23 22:58:12,876 WARN L192 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 129 [2019-11-23 22:58:13,103 WARN L192 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 132 [2019-11-23 22:58:15,899 WARN L192 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2019-11-23 22:58:16,018 WARN L192 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 149 [2019-11-23 22:58:20,132 WARN L192 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 167 [2019-11-23 22:58:23,884 WARN L192 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 196 DAG size of output: 191 [2019-11-23 22:58:25,278 WARN L192 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 199 DAG size of output: 198 [2019-11-23 22:58:31,589 WARN L192 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 216 DAG size of output: 214 [2019-11-23 22:58:41,470 WARN L192 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 254 [2019-11-23 22:58:41,646 WARN L192 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 255 DAG size of output: 255 [2019-11-23 22:58:46,741 WARN L192 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 269 [2019-11-23 22:58:46,873 WARN L192 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 270 DAG size of output: 270 [2019-11-23 22:58:50,339 WARN L192 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 278 DAG size of output: 277 [2019-11-23 22:58:54,570 WARN L192 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 290 DAG size of output: 287 [2019-11-23 22:58:56,553 WARN L192 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 300 DAG size of output: 297 [2019-11-23 22:59:00,677 WARN L192 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 300 DAG size of output: 300 [2019-11-23 22:59:04,714 WARN L192 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 312 DAG size of output: 310 [2019-11-23 22:59:06,770 WARN L192 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 320 DAG size of output: 317 [2019-11-23 22:59:06,890 WARN L192 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 318 DAG size of output: 312 [2019-11-23 22:59:08,985 WARN L192 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 320 DAG size of output: 316 [2019-11-23 22:59:09,099 WARN L192 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 317 DAG size of output: 313 [2019-11-23 22:59:09,344 WARN L192 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 317 DAG size of output: 315 [2019-11-23 22:59:09,559 WARN L192 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 318 DAG size of output: 318 [2019-11-23 22:59:11,884 WARN L192 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 322 [2019-11-23 22:59:12,003 WARN L192 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 323 DAG size of output: 322 [2019-11-23 22:59:14,486 WARN L192 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 326 DAG size of output: 325 [2019-11-23 22:59:16,709 WARN L192 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 328 [2019-11-23 22:59:16,825 WARN L192 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 329 DAG size of output: 329 [2019-11-23 22:59:19,115 WARN L192 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 338 DAG size of output: 336 [2019-11-23 22:59:19,244 WARN L192 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 337 DAG size of output: 330 [2019-11-23 22:59:19,366 WARN L192 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 330 [2019-11-23 22:59:19,470 WARN L192 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 331 DAG size of output: 331 [2019-11-23 22:59:22,030 WARN L192 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 335 [2019-11-23 22:59:22,159 WARN L192 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 336 DAG size of output: 334 [2019-11-23 22:59:22,306 WARN L192 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 336 [2019-11-23 22:59:22,415 WARN L192 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 337 DAG size of output: 337 [2019-11-23 22:59:24,731 WARN L192 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 347 DAG size of output: 346 [2019-11-23 22:59:24,846 WARN L192 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 347 DAG size of output: 342 [2019-11-23 22:59:27,961 WARN L192 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 346 [2019-11-23 22:59:28,088 WARN L192 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 347 DAG size of output: 345 [2019-11-23 22:59:30,743 WARN L192 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 347 [2019-11-23 22:59:30,865 WARN L192 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 348 DAG size of output: 348 [2019-11-23 22:59:33,343 WARN L192 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 356 DAG size of output: 352 [2019-11-23 22:59:33,472 WARN L192 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 353 DAG size of output: 353 [2019-11-23 22:59:36,052 WARN L192 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 357 [2019-11-23 22:59:36,191 WARN L192 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 358 DAG size of output: 356