/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_m5.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 22:59:44,735 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 22:59:44,738 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 22:59:44,754 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 22:59:44,754 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 22:59:44,757 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 22:59:44,759 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 22:59:44,771 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 22:59:44,773 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 22:59:44,774 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 22:59:44,775 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 22:59:44,776 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 22:59:44,776 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 22:59:44,777 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 22:59:44,778 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 22:59:44,779 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 22:59:44,780 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 22:59:44,781 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 22:59:44,782 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 22:59:44,784 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 22:59:44,786 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 22:59:44,786 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 22:59:44,787 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 22:59:44,788 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 22:59:44,790 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 22:59:44,799 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 22:59:44,800 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 22:59:44,800 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 22:59:44,801 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 22:59:44,816 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 22:59:44,816 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 22:59:44,817 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-23 22:59:44,817 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-23 22:59:44,817 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-23 22:59:44,818 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-23 22:59:44,818 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-23 22:59:44,818 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-23 22:59:44,818 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-23 22:59:44,818 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-23 22:59:44,819 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-23 22:59:44,819 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-23 22:59:44,819 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-23 22:59:44,819 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-23 22:59:44,820 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-23 22:59:44,820 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 22:59:44,820 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 22:59:44,821 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 22:59:44,821 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 22:59:44,821 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 22:59:44,821 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 22:59:44,821 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 22:59:44,822 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 22:59:44,822 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 22:59:44,822 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 22:59:44,822 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 22:59:44,823 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 22:59:44,823 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 22:59:44,823 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 22:59:44,823 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 22:59:44,823 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 22:59:44,824 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 22:59:44,824 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 22:59:44,824 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-23 22:59:44,824 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 22:59:44,824 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 22:59:44,824 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 22:59:44,825 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-23 22:59:45,102 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 22:59:45,121 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 22:59:45,128 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 22:59:45,130 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 22:59:45,130 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 22:59:45,131 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/zero_sum_m5.c [2019-11-23 22:59:45,204 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5427d6316/7c11e3d1356a45dca71a44d2c5235405/FLAG5a663d4b3 [2019-11-23 22:59:45,640 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 22:59:45,641 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/zero_sum_m5.c [2019-11-23 22:59:45,647 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5427d6316/7c11e3d1356a45dca71a44d2c5235405/FLAG5a663d4b3 [2019-11-23 22:59:46,022 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5427d6316/7c11e3d1356a45dca71a44d2c5235405 [2019-11-23 22:59:46,032 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 22:59:46,034 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 22:59:46,035 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 22:59:46,036 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 22:59:46,039 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 22:59:46,040 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:59:46" (1/1) ... [2019-11-23 22:59:46,043 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@164b9106 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:59:46, skipping insertion in model container [2019-11-23 22:59:46,044 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:59:46" (1/1) ... [2019-11-23 22:59:46,052 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 22:59:46,078 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 22:59:46,296 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 22:59:46,301 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 22:59:46,329 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 22:59:46,346 INFO L208 MainTranslator]: Completed translation [2019-11-23 22:59:46,346 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:59:46 WrapperNode [2019-11-23 22:59:46,347 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 22:59:46,347 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 22:59:46,347 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 22:59:46,347 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 22:59:46,439 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:59:46" (1/1) ... [2019-11-23 22:59:46,448 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:59:46" (1/1) ... [2019-11-23 22:59:46,474 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 22:59:46,474 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 22:59:46,474 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 22:59:46,474 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 22:59:46,481 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:59:46" (1/1) ... [2019-11-23 22:59:46,481 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:59:46" (1/1) ... [2019-11-23 22:59:46,484 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:59:46" (1/1) ... [2019-11-23 22:59:46,484 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:59:46" (1/1) ... [2019-11-23 22:59:46,491 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:59:46" (1/1) ... [2019-11-23 22:59:46,498 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:59:46" (1/1) ... [2019-11-23 22:59:46,500 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:59:46" (1/1) ... [2019-11-23 22:59:46,503 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 22:59:46,504 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 22:59:46,504 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 22:59:46,504 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 22:59:46,505 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:59:46" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 22:59:46,561 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 22:59:46,564 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 22:59:46,565 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 22:59:46,565 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 22:59:46,565 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 22:59:46,565 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 22:59:47,137 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 22:59:47,137 INFO L284 CfgBuilder]: Removed 17 assume(true) statements. [2019-11-23 22:59:47,139 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:59:47 BoogieIcfgContainer [2019-11-23 22:59:47,139 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 22:59:47,140 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 22:59:47,140 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 22:59:47,144 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 22:59:47,144 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 10:59:46" (1/3) ... [2019-11-23 22:59:47,145 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60c97885 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:59:47, skipping insertion in model container [2019-11-23 22:59:47,145 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:59:46" (2/3) ... [2019-11-23 22:59:47,146 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60c97885 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:59:47, skipping insertion in model container [2019-11-23 22:59:47,146 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:59:47" (3/3) ... [2019-11-23 22:59:47,148 INFO L109 eAbstractionObserver]: Analyzing ICFG zero_sum_m5.c [2019-11-23 22:59:47,157 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 22:59:47,165 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 22:59:47,175 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 22:59:47,196 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 22:59:47,197 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 22:59:47,197 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 22:59:47,197 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 22:59:47,197 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 22:59:47,198 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 22:59:47,198 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 22:59:47,198 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 22:59:47,213 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2019-11-23 22:59:47,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-23 22:59:47,219 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:59:47,220 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:59:47,221 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:59:47,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:59:47,227 INFO L82 PathProgramCache]: Analyzing trace with hash 282673534, now seen corresponding path program 1 times [2019-11-23 22:59:47,235 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 22:59:47,235 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808217274] [2019-11-23 22:59:47,236 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:59:47,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:59:47,415 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 22:59:47,415 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808217274] [2019-11-23 22:59:47,416 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:59:47,417 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 22:59:47,418 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897370855] [2019-11-23 22:59:47,422 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 22:59:47,423 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 22:59:47,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 22:59:47,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-23 22:59:47,439 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 4 states. [2019-11-23 22:59:47,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:59:47,531 INFO L93 Difference]: Finished difference Result 40 states and 60 transitions. [2019-11-23 22:59:47,531 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 22:59:47,533 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2019-11-23 22:59:47,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:59:47,543 INFO L225 Difference]: With dead ends: 40 [2019-11-23 22:59:47,543 INFO L226 Difference]: Without dead ends: 26 [2019-11-23 22:59:47,546 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 22:59:47,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-11-23 22:59:47,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-11-23 22:59:47,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-23 22:59:47,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 45 transitions. [2019-11-23 22:59:47,586 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 45 transitions. Word has length 15 [2019-11-23 22:59:47,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:59:47,586 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 45 transitions. [2019-11-23 22:59:47,587 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 22:59:47,587 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 45 transitions. [2019-11-23 22:59:47,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-23 22:59:47,588 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:59:47,588 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:59:47,588 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:59:47,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:59:47,589 INFO L82 PathProgramCache]: Analyzing trace with hash -836025365, now seen corresponding path program 1 times [2019-11-23 22:59:47,589 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 22:59:47,589 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890940316] [2019-11-23 22:59:47,589 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:59:47,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:59:47,655 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 22:59:47,655 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890940316] [2019-11-23 22:59:47,656 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:59:47,656 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 22:59:47,656 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097101790] [2019-11-23 22:59:47,657 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 22:59:47,658 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 22:59:47,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 22:59:47,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 22:59:47,659 INFO L87 Difference]: Start difference. First operand 26 states and 45 transitions. Second operand 3 states. [2019-11-23 22:59:47,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:59:47,718 INFO L93 Difference]: Finished difference Result 50 states and 88 transitions. [2019-11-23 22:59:47,719 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 22:59:47,719 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2019-11-23 22:59:47,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:59:47,720 INFO L225 Difference]: With dead ends: 50 [2019-11-23 22:59:47,720 INFO L226 Difference]: Without dead ends: 27 [2019-11-23 22:59:47,721 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 22:59:47,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-11-23 22:59:47,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2019-11-23 22:59:47,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-11-23 22:59:47,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 46 transitions. [2019-11-23 22:59:47,729 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 46 transitions. Word has length 16 [2019-11-23 22:59:47,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:59:47,729 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 46 transitions. [2019-11-23 22:59:47,730 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 22:59:47,730 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 46 transitions. [2019-11-23 22:59:47,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-23 22:59:47,731 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:59:47,731 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:59:47,731 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:59:47,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:59:47,732 INFO L82 PathProgramCache]: Analyzing trace with hash -493348480, now seen corresponding path program 1 times [2019-11-23 22:59:47,732 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 22:59:47,733 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211966410] [2019-11-23 22:59:47,733 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:59:47,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:59:47,793 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 22:59:47,794 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211966410] [2019-11-23 22:59:47,794 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:59:47,795 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 22:59:47,795 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549443102] [2019-11-23 22:59:47,795 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 22:59:47,796 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 22:59:47,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 22:59:47,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 22:59:47,797 INFO L87 Difference]: Start difference. First operand 27 states and 46 transitions. Second operand 4 states. [2019-11-23 22:59:47,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:59:47,901 INFO L93 Difference]: Finished difference Result 48 states and 84 transitions. [2019-11-23 22:59:47,902 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 22:59:47,902 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2019-11-23 22:59:47,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:59:47,903 INFO L225 Difference]: With dead ends: 48 [2019-11-23 22:59:47,903 INFO L226 Difference]: Without dead ends: 27 [2019-11-23 22:59:47,904 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 22:59:47,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-11-23 22:59:47,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2019-11-23 22:59:47,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-11-23 22:59:47,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 37 transitions. [2019-11-23 22:59:47,912 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 37 transitions. Word has length 17 [2019-11-23 22:59:47,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:59:47,913 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 37 transitions. [2019-11-23 22:59:47,913 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 22:59:47,913 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 37 transitions. [2019-11-23 22:59:47,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-11-23 22:59:47,914 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:59:47,915 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, 1, 1, 1, 1] [2019-11-23 22:59:47,915 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:59:47,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:59:47,916 INFO L82 PathProgramCache]: Analyzing trace with hash 21627647, now seen corresponding path program 1 times [2019-11-23 22:59:47,916 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 22:59:47,917 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884202206] [2019-11-23 22:59:47,917 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:59:47,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:59:48,060 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-23 22:59:48,060 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884202206] [2019-11-23 22:59:48,061 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176251742] [2019-11-23 22:59:48,061 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 22:59:48,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:59:48,125 INFO L255 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 22:59:48,132 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:59:48,176 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-23 22:59:48,176 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-23 22:59:48,197 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-23 22:59:48,197 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1657414810] [2019-11-23 22:59:48,223 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2019-11-23 22:59:48,224 INFO L166 IcfgInterpreter]: Building call graph [2019-11-23 22:59:48,229 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-23 22:59:48,237 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-23 22:59:48,237 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-23 22:59:49,881 WARN L192 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 126 [2019-11-23 22:59:50,223 WARN L192 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 129 [2019-11-23 23:00:03,155 WARN L192 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2019-11-23 23:00:21,970 WARN L192 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 266 DAG size of output: 262 [2019-11-23 23:00:29,314 WARN L192 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 281 DAG size of output: 280 [2019-11-23 23:00:31,286 WARN L192 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 288 DAG size of output: 285 [2019-11-23 23:00:31,526 WARN L192 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 288 DAG size of output: 287 [2019-11-23 23:00:31,764 WARN L192 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 291 DAG size of output: 289 [2019-11-23 23:00:34,232 WARN L192 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 297 DAG size of output: 297 [2019-11-23 23:00:38,767 WARN L192 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 307 DAG size of output: 307 [2019-11-23 23:00:41,008 WARN L192 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 311 [2019-11-23 23:00:41,126 WARN L192 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 312 DAG size of output: 312 [2019-11-23 23:00:43,315 WARN L192 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 316 [2019-11-23 23:00:43,452 WARN L192 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 317 DAG size of output: 311 [2019-11-23 23:00:43,601 WARN L192 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 309 [2019-11-23 23:00:43,706 WARN L192 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 310 DAG size of output: 310 [2019-11-23 23:00:48,445 WARN L192 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 325 DAG size of output: 324 [2019-11-23 23:00:48,579 WARN L192 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 325 DAG size of output: 317 [2019-11-23 23:00:48,823 WARN L192 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 319 DAG size of output: 318 [2019-11-23 23:00:49,060 WARN L192 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 322 DAG size of output: 322 [2019-11-23 23:00:51,417 WARN L192 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 333 DAG size of output: 329 [2019-11-23 23:00:51,534 WARN L192 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 330 DAG size of output: 326 [2019-11-23 23:00:54,001 WARN L192 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 329 [2019-11-23 23:00:54,130 WARN L192 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 330 DAG size of output: 329 [2019-11-23 23:00:56,621 WARN L192 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 338 DAG size of output: 336 [2019-11-23 23:00:56,772 WARN L192 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 337 DAG size of output: 332 [2019-11-23 23:00:56,907 WARN L192 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 335 [2019-11-23 23:00:57,035 WARN L192 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 336 DAG size of output: 334 [2019-11-23 23:00:57,273 WARN L192 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 337 DAG size of output: 337 [2019-11-23 23:01:00,141 WARN L192 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 341 [2019-11-23 23:01:00,265 WARN L192 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 342 DAG size of output: 342 [2019-11-23 23:01:02,770 WARN L192 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 352 DAG size of output: 350 [2019-11-23 23:01:02,923 WARN L192 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 351 DAG size of output: 346 [2019-11-23 23:01:05,834 WARN L192 SmtUtils]: Spent 324.00 ms on a formula simplification that was a NOOP. DAG size: 349 [2019-11-23 23:01:06,104 WARN L192 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 350 DAG size of output: 350 [2019-11-23 23:01:08,851 WARN L192 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 354 [2019-11-23 23:01:09,007 WARN L192 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 355 DAG size of output: 351 [2019-11-23 23:01:09,156 WARN L192 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 351 [2019-11-23 23:01:09,293 WARN L192 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 352 DAG size of output: 351 [2019-11-23 23:01:09,440 WARN L192 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 354 [2019-11-23 23:01:09,559 WARN L192 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 355 DAG size of output: 355 [2019-11-23 23:01:12,470 WARN L192 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 359 [2019-11-23 23:01:12,612 WARN L192 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 360 DAG size of output: 357 [2019-11-23 23:01:12,752 WARN L192 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 358 [2019-11-23 23:01:12,873 WARN L192 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 359 DAG size of output: 359 [2019-11-23 23:01:15,656 WARN L192 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 370 DAG size of output: 368 [2019-11-23 23:01:15,809 WARN L192 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 369 DAG size of output: 363 [2019-11-23 23:01:18,688 WARN L192 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 366 [2019-11-23 23:01:18,843 WARN L192 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 367 DAG size of output: 365