/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_partition_original_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 23:12:37,195 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 23:12:37,198 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 23:12:37,210 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-23 23:12:37,220 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 23:12:37,221 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 23:12:37,222 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 23:12:37,223 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 23:12:37,224 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 23:12:37,225 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 23:12:37,226 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 23:12:37,228 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 23:12:37,230 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 23:12:37,231 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 23:12:37,232 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 23:12:37,233 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 23:12:37,235 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 23:12:37,243 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 23:12:37,243 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 23:12:37,244 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 23:12:37,245 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 23:12:37,265 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 23:12:37,265 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 23:12:37,266 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-23 23:12:37,266 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-23 23:12:37,266 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-23 23:12:37,267 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-23 23:12:37,267 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-23 23:12:37,267 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-23 23:12:37,267 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-23 23:12:37,267 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-23 23:12:37,269 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-23 23:12:37,269 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-23 23:12:37,269 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-23 23:12:37,270 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-23 23:12:37,270 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-23 23:12:37,271 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 23:12:37,271 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 23:12:37,272 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 23:12:37,272 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 23:12:37,272 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 23:12:37,273 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 23:12:37,273 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 23:12:37,273 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 23:12:37,273 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 23:12:37,273 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 23:12:37,274 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 23:12:37,274 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 23:12:37,274 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 23:12:37,275 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 23:12:37,275 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 23:12:37,275 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 23:12:37,276 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 23:12:37,276 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 23:12:37,276 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-23 23:12:37,277 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 23:12:37,277 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 23:12:37,277 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 23:12:37,277 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-23 23:12:37,598 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 23:12:37,621 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 23:12:37,625 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 23:12:37,626 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 23:12:37,627 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 23:12:37,627 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_partition_original_ground.i [2019-11-23 23:12:37,710 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5e6c6e700/e9a6f48f0bc747f28f2d75d53395c88d/FLAG45c658487 [2019-11-23 23:12:38,196 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 23:12:38,197 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_partition_original_ground.i [2019-11-23 23:12:38,203 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5e6c6e700/e9a6f48f0bc747f28f2d75d53395c88d/FLAG45c658487 [2019-11-23 23:12:38,557 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5e6c6e700/e9a6f48f0bc747f28f2d75d53395c88d [2019-11-23 23:12:38,568 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 23:12:38,569 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 23:12:38,570 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 23:12:38,571 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 23:12:38,574 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 23:12:38,575 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 11:12:38" (1/1) ... [2019-11-23 23:12:38,578 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7142d6f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:12:38, skipping insertion in model container [2019-11-23 23:12:38,579 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 11:12:38" (1/1) ... [2019-11-23 23:12:38,587 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 23:12:38,608 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 23:12:38,873 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 23:12:38,880 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 23:12:38,927 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 23:12:38,952 INFO L208 MainTranslator]: Completed translation [2019-11-23 23:12:38,952 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:12:38 WrapperNode [2019-11-23 23:12:38,952 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 23:12:38,953 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 23:12:38,954 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 23:12:38,954 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 23:12:39,042 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:12:38" (1/1) ... [2019-11-23 23:12:39,052 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:12:38" (1/1) ... [2019-11-23 23:12:39,075 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 23:12:39,076 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 23:12:39,076 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 23:12:39,076 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 23:12:39,086 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:12:38" (1/1) ... [2019-11-23 23:12:39,086 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:12:38" (1/1) ... [2019-11-23 23:12:39,089 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:12:38" (1/1) ... [2019-11-23 23:12:39,089 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:12:38" (1/1) ... [2019-11-23 23:12:39,096 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:12:38" (1/1) ... [2019-11-23 23:12:39,101 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:12:38" (1/1) ... [2019-11-23 23:12:39,103 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:12:38" (1/1) ... [2019-11-23 23:12:39,105 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 23:12:39,106 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 23:12:39,106 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 23:12:39,106 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 23:12:39,107 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:12:38" (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 23:12:39,164 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 23:12:39,164 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 23:12:39,164 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 23:12:39,164 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 23:12:39,164 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 23:12:39,165 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 23:12:39,638 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 23:12:39,639 INFO L284 CfgBuilder]: Removed 12 assume(true) statements. [2019-11-23 23:12:39,640 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 11:12:39 BoogieIcfgContainer [2019-11-23 23:12:39,640 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 23:12:39,641 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 23:12:39,641 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 23:12:39,644 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 23:12:39,645 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 11:12:38" (1/3) ... [2019-11-23 23:12:39,646 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45c33468 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 11:12:39, skipping insertion in model container [2019-11-23 23:12:39,646 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:12:38" (2/3) ... [2019-11-23 23:12:39,646 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45c33468 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 11:12:39, skipping insertion in model container [2019-11-23 23:12:39,647 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 11:12:39" (3/3) ... [2019-11-23 23:12:39,648 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_partition_original_ground.i [2019-11-23 23:12:39,658 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 23:12:39,664 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2019-11-23 23:12:39,675 INFO L249 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2019-11-23 23:12:39,699 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 23:12:39,699 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 23:12:39,699 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 23:12:39,700 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 23:12:39,700 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 23:12:39,700 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 23:12:39,700 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 23:12:39,700 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 23:12:39,716 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states. [2019-11-23 23:12:39,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-11-23 23:12:39,723 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:12:39,724 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-11-23 23:12:39,724 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:12:39,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:12:39,731 INFO L82 PathProgramCache]: Analyzing trace with hash -857490957, now seen corresponding path program 1 times [2019-11-23 23:12:39,741 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:12:39,742 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014714403] [2019-11-23 23:12:39,742 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:12:39,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:12:39,901 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 23:12:39,902 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014714403] [2019-11-23 23:12:39,903 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 23:12:39,903 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-23 23:12:39,904 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776915480] [2019-11-23 23:12:39,910 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 23:12:39,911 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 23:12:39,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 23:12:39,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 23:12:39,929 INFO L87 Difference]: Start difference. First operand 14 states. Second operand 3 states. [2019-11-23 23:12:39,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 23:12:39,959 INFO L93 Difference]: Finished difference Result 27 states and 37 transitions. [2019-11-23 23:12:39,960 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 23:12:39,962 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2019-11-23 23:12:39,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 23:12:39,974 INFO L225 Difference]: With dead ends: 27 [2019-11-23 23:12:39,974 INFO L226 Difference]: Without dead ends: 14 [2019-11-23 23:12:39,978 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 23:12:40,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2019-11-23 23:12:40,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2019-11-23 23:12:40,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-11-23 23:12:40,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 17 transitions. [2019-11-23 23:12:40,025 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 17 transitions. Word has length 6 [2019-11-23 23:12:40,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 23:12:40,025 INFO L462 AbstractCegarLoop]: Abstraction has 14 states and 17 transitions. [2019-11-23 23:12:40,025 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 23:12:40,026 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 17 transitions. [2019-11-23 23:12:40,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-11-23 23:12:40,026 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:12:40,027 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-11-23 23:12:40,027 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:12:40,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:12:40,028 INFO L82 PathProgramCache]: Analyzing trace with hash -929020763, now seen corresponding path program 1 times [2019-11-23 23:12:40,028 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:12:40,028 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871091180] [2019-11-23 23:12:40,029 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:12:40,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:12:40,094 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 23:12:40,094 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871091180] [2019-11-23 23:12:40,095 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 23:12:40,095 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-23 23:12:40,095 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534159574] [2019-11-23 23:12:40,097 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 23:12:40,097 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 23:12:40,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 23:12:40,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 23:12:40,098 INFO L87 Difference]: Start difference. First operand 14 states and 17 transitions. Second operand 3 states. [2019-11-23 23:12:40,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 23:12:40,109 INFO L93 Difference]: Finished difference Result 25 states and 30 transitions. [2019-11-23 23:12:40,109 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 23:12:40,109 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2019-11-23 23:12:40,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 23:12:40,111 INFO L225 Difference]: With dead ends: 25 [2019-11-23 23:12:40,111 INFO L226 Difference]: Without dead ends: 15 [2019-11-23 23:12:40,112 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 23:12:40,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-11-23 23:12:40,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2019-11-23 23:12:40,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-11-23 23:12:40,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2019-11-23 23:12:40,118 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 18 transitions. Word has length 7 [2019-11-23 23:12:40,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 23:12:40,118 INFO L462 AbstractCegarLoop]: Abstraction has 15 states and 18 transitions. [2019-11-23 23:12:40,118 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 23:12:40,119 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 18 transitions. [2019-11-23 23:12:40,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-23 23:12:40,119 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:12:40,120 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 23:12:40,120 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:12:40,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:12:40,121 INFO L82 PathProgramCache]: Analyzing trace with hash 1269503798, now seen corresponding path program 1 times [2019-11-23 23:12:40,121 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:12:40,121 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490139317] [2019-11-23 23:12:40,122 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:12:40,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:12:40,213 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 23:12:40,216 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490139317] [2019-11-23 23:12:40,216 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580350037] [2019-11-23 23:12:40,217 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 23:12:40,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:12:40,289 INFO L255 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 23:12:40,297 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 23:12:40,332 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 23:12:40,332 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-23 23:12:40,357 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 23:12:40,357 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [937816734] [2019-11-23 23:12:40,400 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2019-11-23 23:12:40,400 INFO L166 IcfgInterpreter]: Building call graph [2019-11-23 23:12:40,412 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-23 23:12:40,420 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-23 23:12:40,420 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-23 23:12:41,552 WARN L192 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 126 [2019-11-23 23:12:42,008 WARN L192 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2019-11-23 23:12:42,146 WARN L192 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 142 [2019-11-23 23:12:42,318 WARN L192 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 142 [2019-11-23 23:12:42,820 WARN L192 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 150 [2019-11-23 23:12:43,037 WARN L192 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 156 [2019-11-23 23:12:43,204 WARN L192 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 156 [2019-11-23 23:12:43,508 WARN L192 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 160 [2019-11-23 23:12:43,779 WARN L192 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 164 [2019-11-23 23:12:44,548 WARN L192 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2019-11-23 23:12:44,701 WARN L192 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2019-11-23 23:12:44,827 WARN L192 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 169 DAG size of output: 168 [2019-11-23 23:12:45,513 WARN L192 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 171 [2019-11-23 23:12:46,390 WARN L192 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 175 [2019-11-23 23:12:46,519 WARN L192 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 174 [2019-11-23 23:12:47,432 WARN L192 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 177 [2019-11-23 23:12:47,563 WARN L192 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 178 DAG size of output: 178 [2019-11-23 23:12:49,732 WARN L192 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 188 [2019-11-23 23:12:51,862 WARN L192 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 197 [2019-11-23 23:12:52,078 WARN L192 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 198 DAG size of output: 196 [2019-11-23 23:12:52,302 WARN L192 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 198 [2019-11-23 23:12:52,524 WARN L192 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 199 DAG size of output: 199 [2019-11-23 23:12:53,567 WARN L192 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 207 DAG size of output: 204 [2019-11-23 23:12:53,709 WARN L192 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 205 DAG size of output: 203 [2019-11-23 23:12:54,935 WARN L192 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 206 [2019-11-23 23:12:55,051 WARN L192 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 207 DAG size of output: 206 [2019-11-23 23:12:56,175 WARN L192 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 210 DAG size of output: 208 [2019-11-23 23:13:01,343 WARN L192 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 226 [2019-11-23 23:13:02,726 WARN L192 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 228 [2019-11-23 23:13:04,041 WARN L192 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 230 [2019-11-23 23:13:12,481 WARN L192 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 256 DAG size of output: 255 [2019-11-23 23:13:13,966 WARN L192 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 260 DAG size of output: 257 [2019-11-23 23:13:14,082 WARN L192 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 258 DAG size of output: 255 [2019-11-23 23:13:17,184 WARN L192 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 269 DAG size of output: 265 [2019-11-23 23:13:17,304 WARN L192 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 266 DAG size of output: 264 [2019-11-23 23:13:19,258 WARN L192 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 269 DAG size of output: 267 [2019-11-23 23:13:19,418 WARN L192 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 269 [2019-11-23 23:13:19,534 WARN L192 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 270 DAG size of output: 268 [2019-11-23 23:13:23,459 WARN L192 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 280 DAG size of output: 278 [2019-11-23 23:13:25,176 WARN L192 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 281 [2019-11-23 23:13:25,302 WARN L192 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 282 DAG size of output: 281 [2019-11-23 23:13:27,137 WARN L192 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 289 DAG size of output: 288 [2019-11-23 23:13:27,265 WARN L192 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 289 DAG size of output: 282 [2019-11-23 23:13:29,453 WARN L192 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 304 DAG size of output: 301 [2019-11-23 23:13:29,593 WARN L192 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 302 DAG size of output: 288 [2019-11-23 23:13:31,478 WARN L192 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 291 [2019-11-23 23:13:31,664 WARN L192 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 292 DAG size of output: 292 [2019-11-23 23:13:33,806 WARN L192 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 296 [2019-11-23 23:13:33,939 WARN L192 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 297 DAG size of output: 296 [2019-11-23 23:13:35,823 WARN L192 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 302 DAG size of output: 301 [2019-11-23 23:13:35,959 WARN L192 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 302 DAG size of output: 297 [2019-11-23 23:13:36,090 WARN L192 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 298 [2019-11-23 23:13:36,202 WARN L192 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 299 DAG size of output: 299 [2019-11-23 23:13:38,316 WARN L192 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 303 [2019-11-23 23:13:38,448 WARN L192 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 304 DAG size of output: 303 [2019-11-23 23:13:40,599 WARN L192 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 320 DAG size of output: 318 [2019-11-23 23:13:40,746 WARN L192 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 319 DAG size of output: 306 [2019-11-23 23:13:42,908 WARN L192 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 309 [2019-11-23 23:13:43,031 WARN L192 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 310 DAG size of output: 310 [2019-11-23 23:13:45,268 WARN L192 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 328 DAG size of output: 327 [2019-11-23 23:13:45,404 WARN L192 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 328 DAG size of output: 315 [2019-11-23 23:13:47,757 WARN L192 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 319 [2019-11-23 23:13:47,903 WARN L192 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 320 DAG size of output: 317 [2019-11-23 23:13:48,044 WARN L192 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 318 [2019-11-23 23:13:48,164 WARN L192 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 319 DAG size of output: 319 [2019-11-23 23:13:50,346 WARN L192 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 328 DAG size of output: 326 [2019-11-23 23:13:50,502 WARN L192 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 327 DAG size of output: 323 [2019-11-23 23:13:52,819 WARN L192 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 331 DAG size of output: 329 [2019-11-23 23:13:52,956 WARN L192 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 330 DAG size of output: 327 [2019-11-23 23:13:55,381 WARN L192 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 331 [2019-11-23 23:13:55,536 WARN L192 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 332 DAG size of output: 329 [2019-11-23 23:13:55,679 WARN L192 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 330 [2019-11-23 23:13:55,820 WARN L192 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 331 DAG size of output: 331 [2019-11-23 23:13:58,357 WARN L192 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 335 [2019-11-23 23:13:58,511 WARN L192 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 336 DAG size of output: 334 [2019-11-23 23:13:58,691 WARN L192 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 336 [2019-11-23 23:13:58,847 WARN L192 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 337 DAG size of output: 336 [2019-11-23 23:13:58,978 WARN L192 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 339 [2019-11-23 23:13:59,113 WARN L192 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 340 DAG size of output: 340 [2019-11-23 23:14:01,739 WARN L192 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 344 [2019-11-23 23:14:01,866 WARN L192 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 345 DAG size of output: 345 [2019-11-23 23:14:04,995 WARN L192 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 356 DAG size of output: 353 [2019-11-23 23:14:05,168 WARN L192 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 354 DAG size of output: 349 [2019-11-23 23:14:08,351 WARN L192 SmtUtils]: Spent 396.00 ms on a formula simplification. DAG size of input: 358 DAG size of output: 354 [2019-11-23 23:14:08,646 WARN L192 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 355 DAG size of output: 352