java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --abstractinterpretationv2.abstract.domain IntervalDomain --traceabstraction.trace.refinement.strategy TAIPAN --traceabstraction.abstract.interpretation.mode USE_PREDICATES -i ../../../trunk/examples/svcomp/eca-rers2012/Problem16_label59.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 20:10:32,326 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 20:10:32,329 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 20:10:32,344 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 20:10:32,345 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 20:10:32,346 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 20:10:32,347 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 20:10:32,349 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 20:10:32,351 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 20:10:32,352 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 20:10:32,353 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 20:10:32,354 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 20:10:32,354 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 20:10:32,355 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 20:10:32,356 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 20:10:32,357 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 20:10:32,358 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 20:10:32,359 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 20:10:32,361 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 20:10:32,363 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 20:10:32,365 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 20:10:32,367 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 20:10:32,368 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 20:10:32,369 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 20:10:32,371 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 20:10:32,375 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 20:10:32,375 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 20:10:32,376 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 20:10:32,377 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 20:10:32,378 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 20:10:32,378 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 20:10:32,379 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 20:10:32,379 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 20:10:32,380 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 20:10:32,380 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 20:10:32,381 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 20:10:32,382 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-13 20:10:32,397 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 20:10:32,398 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 20:10:32,399 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 20:10:32,399 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 20:10:32,399 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 20:10:32,400 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 20:10:32,400 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 20:10:32,400 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 20:10:32,400 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 20:10:32,400 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 20:10:32,401 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 20:10:32,401 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 20:10:32,401 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 20:10:32,401 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 20:10:32,401 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 20:10:32,401 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 20:10:32,402 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 20:10:32,402 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 20:10:32,404 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 20:10:32,405 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 20:10:32,405 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 20:10:32,405 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 20:10:32,405 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 20:10:32,406 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 20:10:32,406 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 20:10:32,406 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 20:10:32,407 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 20:10:32,407 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 20:10:32,407 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: Abstract domain -> IntervalDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Abstract interpretation Mode -> USE_PREDICATES [2019-10-13 20:10:32,691 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 20:10:32,710 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 20:10:32,715 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 20:10:32,716 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 20:10:32,717 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 20:10:32,717 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label59.c [2019-10-13 20:10:32,793 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6021f2fa5/b103c950b25b47dbbd0e8cef2d438683/FLAGeab400b04 [2019-10-13 20:10:33,456 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 20:10:33,457 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label59.c [2019-10-13 20:10:33,482 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6021f2fa5/b103c950b25b47dbbd0e8cef2d438683/FLAGeab400b04 [2019-10-13 20:10:33,644 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6021f2fa5/b103c950b25b47dbbd0e8cef2d438683 [2019-10-13 20:10:33,654 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 20:10:33,655 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 20:10:33,657 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 20:10:33,657 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 20:10:33,661 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 20:10:33,662 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:10:33" (1/1) ... [2019-10-13 20:10:33,666 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@76f51de0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:10:33, skipping insertion in model container [2019-10-13 20:10:33,666 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:10:33" (1/1) ... [2019-10-13 20:10:33,676 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 20:10:33,750 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 20:10:34,514 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 20:10:34,521 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 20:10:35,119 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 20:10:35,145 INFO L192 MainTranslator]: Completed translation [2019-10-13 20:10:35,146 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:10:35 WrapperNode [2019-10-13 20:10:35,146 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 20:10:35,147 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 20:10:35,147 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 20:10:35,147 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 20:10:35,163 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:10:35" (1/1) ... [2019-10-13 20:10:35,163 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:10:35" (1/1) ... [2019-10-13 20:10:35,199 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:10:35" (1/1) ... [2019-10-13 20:10:35,200 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:10:35" (1/1) ... [2019-10-13 20:10:35,295 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:10:35" (1/1) ... [2019-10-13 20:10:35,332 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:10:35" (1/1) ... [2019-10-13 20:10:35,352 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:10:35" (1/1) ... [2019-10-13 20:10:35,364 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 20:10:35,364 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 20:10:35,364 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 20:10:35,365 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 20:10:35,366 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:10:35" (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 [2019-10-13 20:10:35,434 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 20:10:35,435 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 20:10:35,435 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 20:10:35,435 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-13 20:10:35,435 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 20:10:35,436 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 20:10:35,436 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-13 20:10:35,436 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 20:10:35,436 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 20:10:35,436 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 20:10:35,437 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 20:10:35,437 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 20:10:35,437 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 20:10:37,862 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 20:10:37,862 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 20:10:37,865 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:10:37 BoogieIcfgContainer [2019-10-13 20:10:37,865 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 20:10:37,866 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 20:10:37,867 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 20:10:37,870 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 20:10:37,870 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 08:10:33" (1/3) ... [2019-10-13 20:10:37,871 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22681042 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:10:37, skipping insertion in model container [2019-10-13 20:10:37,872 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:10:35" (2/3) ... [2019-10-13 20:10:37,872 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22681042 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:10:37, skipping insertion in model container [2019-10-13 20:10:37,872 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:10:37" (3/3) ... [2019-10-13 20:10:37,874 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem16_label59.c [2019-10-13 20:10:37,885 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 20:10:37,896 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 20:10:37,912 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 20:10:37,954 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 20:10:37,954 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 20:10:37,954 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 20:10:37,954 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 20:10:37,954 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 20:10:37,955 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 20:10:37,955 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 20:10:37,955 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 20:10:37,993 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states. [2019-10-13 20:10:38,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-10-13 20:10:38,002 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:10:38,004 INFO L380 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 20:10:38,006 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:10:38,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:10:38,012 INFO L82 PathProgramCache]: Analyzing trace with hash 441103245, now seen corresponding path program 1 times [2019-10-13 20:10:38,024 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:10:38,024 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292987105] [2019-10-13 20:10:38,025 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:10:38,025 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:10:38,025 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:10:38,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:10:38,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:10:38,393 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292987105] [2019-10-13 20:10:38,394 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:10:38,394 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 20:10:38,395 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508445869] [2019-10-13 20:10:38,400 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 20:10:38,401 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:10:38,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 20:10:38,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-13 20:10:38,420 INFO L87 Difference]: Start difference. First operand 409 states. Second operand 4 states. [2019-10-13 20:10:42,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:10:42,144 INFO L93 Difference]: Finished difference Result 1509 states and 2834 transitions. [2019-10-13 20:10:42,146 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 20:10:42,148 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 50 [2019-10-13 20:10:42,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:10:42,178 INFO L225 Difference]: With dead ends: 1509 [2019-10-13 20:10:42,179 INFO L226 Difference]: Without dead ends: 1019 [2019-10-13 20:10:42,191 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-13 20:10:42,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1019 states. [2019-10-13 20:10:42,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1019 to 682. [2019-10-13 20:10:42,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 682 states. [2019-10-13 20:10:42,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 682 states to 682 states and 1190 transitions. [2019-10-13 20:10:42,310 INFO L78 Accepts]: Start accepts. Automaton has 682 states and 1190 transitions. Word has length 50 [2019-10-13 20:10:42,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:10:42,311 INFO L462 AbstractCegarLoop]: Abstraction has 682 states and 1190 transitions. [2019-10-13 20:10:42,311 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 20:10:42,312 INFO L276 IsEmpty]: Start isEmpty. Operand 682 states and 1190 transitions. [2019-10-13 20:10:42,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2019-10-13 20:10:42,317 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:10:42,318 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 20:10:42,318 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:10:42,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:10:42,319 INFO L82 PathProgramCache]: Analyzing trace with hash -233546559, now seen corresponding path program 1 times [2019-10-13 20:10:42,319 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:10:42,319 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514452101] [2019-10-13 20:10:42,320 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:10:42,320 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:10:42,320 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:10:42,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:10:42,568 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:10:42,570 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514452101] [2019-10-13 20:10:42,570 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:10:42,571 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-13 20:10:42,571 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040444042] [2019-10-13 20:10:42,577 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 20:10:42,578 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:10:42,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 20:10:42,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-13 20:10:42,579 INFO L87 Difference]: Start difference. First operand 682 states and 1190 transitions. Second operand 5 states. [2019-10-13 20:10:45,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:10:46,000 INFO L93 Difference]: Finished difference Result 2068 states and 3645 transitions. [2019-10-13 20:10:46,000 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 20:10:46,001 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 119 [2019-10-13 20:10:46,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:10:46,014 INFO L225 Difference]: With dead ends: 2068 [2019-10-13 20:10:46,014 INFO L226 Difference]: Without dead ends: 1392 [2019-10-13 20:10:46,017 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-10-13 20:10:46,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1392 states. [2019-10-13 20:10:46,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1392 to 1374. [2019-10-13 20:10:46,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1374 states. [2019-10-13 20:10:46,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1374 states to 1374 states and 2277 transitions. [2019-10-13 20:10:46,099 INFO L78 Accepts]: Start accepts. Automaton has 1374 states and 2277 transitions. Word has length 119 [2019-10-13 20:10:46,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:10:46,101 INFO L462 AbstractCegarLoop]: Abstraction has 1374 states and 2277 transitions. [2019-10-13 20:10:46,101 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 20:10:46,101 INFO L276 IsEmpty]: Start isEmpty. Operand 1374 states and 2277 transitions. [2019-10-13 20:10:46,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2019-10-13 20:10:46,110 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:10:46,111 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 20:10:46,111 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:10:46,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:10:46,112 INFO L82 PathProgramCache]: Analyzing trace with hash -702025816, now seen corresponding path program 1 times [2019-10-13 20:10:46,112 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:10:46,113 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702239199] [2019-10-13 20:10:46,114 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:10:46,114 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:10:46,114 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:10:46,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:10:46,322 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:10:46,323 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702239199] [2019-10-13 20:10:46,323 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:10:46,323 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 20:10:46,323 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307932747] [2019-10-13 20:10:46,327 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 20:10:46,327 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:10:46,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 20:10:46,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-13 20:10:46,332 INFO L87 Difference]: Start difference. First operand 1374 states and 2277 transitions. Second operand 6 states. [2019-10-13 20:10:50,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:10:50,882 INFO L93 Difference]: Finished difference Result 3463 states and 5746 transitions. [2019-10-13 20:10:50,882 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 20:10:50,883 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 122 [2019-10-13 20:10:50,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:10:50,896 INFO L225 Difference]: With dead ends: 3463 [2019-10-13 20:10:50,897 INFO L226 Difference]: Without dead ends: 2095 [2019-10-13 20:10:50,900 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-10-13 20:10:50,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2095 states. [2019-10-13 20:10:50,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2095 to 2077. [2019-10-13 20:10:50,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2077 states. [2019-10-13 20:10:50,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2077 states to 2077 states and 3299 transitions. [2019-10-13 20:10:50,969 INFO L78 Accepts]: Start accepts. Automaton has 2077 states and 3299 transitions. Word has length 122 [2019-10-13 20:10:50,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:10:50,970 INFO L462 AbstractCegarLoop]: Abstraction has 2077 states and 3299 transitions. [2019-10-13 20:10:50,970 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 20:10:50,971 INFO L276 IsEmpty]: Start isEmpty. Operand 2077 states and 3299 transitions. [2019-10-13 20:10:50,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2019-10-13 20:10:50,973 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:10:50,973 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 20:10:50,973 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:10:50,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:10:50,974 INFO L82 PathProgramCache]: Analyzing trace with hash 1139332729, now seen corresponding path program 1 times [2019-10-13 20:10:50,974 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:10:50,974 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746808238] [2019-10-13 20:10:50,974 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:10:50,975 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:10:50,975 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:10:50,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:10:51,097 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:10:51,098 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746808238] [2019-10-13 20:10:51,098 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:10:51,098 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 20:10:51,098 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947934234] [2019-10-13 20:10:51,099 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 20:10:51,099 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:10:51,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 20:10:51,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-13 20:10:51,100 INFO L87 Difference]: Start difference. First operand 2077 states and 3299 transitions. Second operand 6 states. [2019-10-13 20:10:53,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:10:53,713 INFO L93 Difference]: Finished difference Result 4874 states and 7768 transitions. [2019-10-13 20:10:53,714 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 20:10:53,714 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 123 [2019-10-13 20:10:53,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:10:53,738 INFO L225 Difference]: With dead ends: 4874 [2019-10-13 20:10:53,738 INFO L226 Difference]: Without dead ends: 2803 [2019-10-13 20:10:53,745 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-10-13 20:10:53,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2803 states. [2019-10-13 20:10:53,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2803 to 2790. [2019-10-13 20:10:53,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2790 states. [2019-10-13 20:10:53,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2790 states to 2790 states and 4061 transitions. [2019-10-13 20:10:53,842 INFO L78 Accepts]: Start accepts. Automaton has 2790 states and 4061 transitions. Word has length 123 [2019-10-13 20:10:53,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:10:53,844 INFO L462 AbstractCegarLoop]: Abstraction has 2790 states and 4061 transitions. [2019-10-13 20:10:53,844 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 20:10:53,844 INFO L276 IsEmpty]: Start isEmpty. Operand 2790 states and 4061 transitions. [2019-10-13 20:10:53,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2019-10-13 20:10:53,846 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:10:53,847 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 20:10:53,847 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:10:53,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:10:53,847 INFO L82 PathProgramCache]: Analyzing trace with hash 721853152, now seen corresponding path program 1 times [2019-10-13 20:10:53,848 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:10:53,848 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924880019] [2019-10-13 20:10:53,849 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:10:53,849 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:10:53,849 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:10:53,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:10:53,971 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:10:53,971 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924880019] [2019-10-13 20:10:53,972 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:10:53,972 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 20:10:53,972 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841411236] [2019-10-13 20:10:53,973 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 20:10:53,973 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:10:53,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 20:10:53,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-13 20:10:53,974 INFO L87 Difference]: Start difference. First operand 2790 states and 4061 transitions. Second operand 6 states. [2019-10-13 20:10:56,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:10:56,785 INFO L93 Difference]: Finished difference Result 7362 states and 11039 transitions. [2019-10-13 20:10:56,785 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 20:10:56,786 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 126 [2019-10-13 20:10:56,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:10:56,814 INFO L225 Difference]: With dead ends: 7362 [2019-10-13 20:10:56,814 INFO L226 Difference]: Without dead ends: 4578 [2019-10-13 20:10:56,823 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-13 20:10:56,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4578 states. [2019-10-13 20:10:57,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4578 to 4526. [2019-10-13 20:10:57,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4526 states. [2019-10-13 20:10:57,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4526 states to 4526 states and 6572 transitions. [2019-10-13 20:10:57,030 INFO L78 Accepts]: Start accepts. Automaton has 4526 states and 6572 transitions. Word has length 126 [2019-10-13 20:10:57,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:10:57,030 INFO L462 AbstractCegarLoop]: Abstraction has 4526 states and 6572 transitions. [2019-10-13 20:10:57,031 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 20:10:57,031 INFO L276 IsEmpty]: Start isEmpty. Operand 4526 states and 6572 transitions. [2019-10-13 20:10:57,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2019-10-13 20:10:57,034 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:10:57,034 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 20:10:57,034 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:10:57,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:10:57,035 INFO L82 PathProgramCache]: Analyzing trace with hash -1023749808, now seen corresponding path program 1 times [2019-10-13 20:10:57,035 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:10:57,035 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568759499] [2019-10-13 20:10:57,035 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:10:57,036 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:10:57,036 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:10:57,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:10:57,163 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:10:57,164 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568759499] [2019-10-13 20:10:57,164 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:10:57,164 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 20:10:57,164 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706791806] [2019-10-13 20:10:57,165 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 20:10:57,165 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:10:57,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 20:10:57,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-13 20:10:57,166 INFO L87 Difference]: Start difference. First operand 4526 states and 6572 transitions. Second operand 6 states. [2019-10-13 20:10:59,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:10:59,789 INFO L93 Difference]: Finished difference Result 12150 states and 17943 transitions. [2019-10-13 20:10:59,789 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 20:10:59,790 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 134 [2019-10-13 20:10:59,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:10:59,825 INFO L225 Difference]: With dead ends: 12150 [2019-10-13 20:10:59,825 INFO L226 Difference]: Without dead ends: 7630 [2019-10-13 20:10:59,837 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-10-13 20:10:59,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7630 states. [2019-10-13 20:10:59,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7630 to 6239. [2019-10-13 20:10:59,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6239 states. [2019-10-13 20:10:59,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6239 states to 6239 states and 8457 transitions. [2019-10-13 20:10:59,987 INFO L78 Accepts]: Start accepts. Automaton has 6239 states and 8457 transitions. Word has length 134 [2019-10-13 20:10:59,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:10:59,988 INFO L462 AbstractCegarLoop]: Abstraction has 6239 states and 8457 transitions. [2019-10-13 20:10:59,988 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 20:10:59,988 INFO L276 IsEmpty]: Start isEmpty. Operand 6239 states and 8457 transitions. [2019-10-13 20:10:59,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2019-10-13 20:10:59,997 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:10:59,997 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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, 1, 1, 1, 1, 1] [2019-10-13 20:10:59,998 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:10:59,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:10:59,998 INFO L82 PathProgramCache]: Analyzing trace with hash -1718542795, now seen corresponding path program 1 times [2019-10-13 20:10:59,998 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:10:59,998 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212758843] [2019-10-13 20:10:59,999 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:10:59,999 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:10:59,999 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:11:00,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:11:00,175 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 20 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:11:00,175 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212758843] [2019-10-13 20:11:00,176 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766572710] [2019-10-13 20:11:00,176 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 [2019-10-13 20:11:00,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:11:00,284 INFO L256 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 20:11:00,297 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 20:11:00,393 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:11:00,393 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 20:11:00,461 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:11:00,461 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 20:11:00,461 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4] total 6 [2019-10-13 20:11:00,462 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191709214] [2019-10-13 20:11:00,463 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 20:11:00,463 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:11:00,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 20:11:00,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-13 20:11:00,464 INFO L87 Difference]: Start difference. First operand 6239 states and 8457 transitions. Second operand 4 states. [2019-10-13 20:11:02,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:11:02,988 INFO L93 Difference]: Finished difference Result 14507 states and 19305 transitions. [2019-10-13 20:11:02,988 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 20:11:02,989 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 141 [2019-10-13 20:11:02,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:11:03,017 INFO L225 Difference]: With dead ends: 14507 [2019-10-13 20:11:03,018 INFO L226 Difference]: Without dead ends: 5504 [2019-10-13 20:11:03,036 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 282 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-13 20:11:03,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5504 states. [2019-10-13 20:11:03,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5504 to 4826. [2019-10-13 20:11:03,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4826 states. [2019-10-13 20:11:03,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4826 states to 4826 states and 5228 transitions. [2019-10-13 20:11:03,165 INFO L78 Accepts]: Start accepts. Automaton has 4826 states and 5228 transitions. Word has length 141 [2019-10-13 20:11:03,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:11:03,165 INFO L462 AbstractCegarLoop]: Abstraction has 4826 states and 5228 transitions. [2019-10-13 20:11:03,166 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 20:11:03,166 INFO L276 IsEmpty]: Start isEmpty. Operand 4826 states and 5228 transitions. [2019-10-13 20:11:03,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2019-10-13 20:11:03,169 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:11:03,169 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 20:11:03,382 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 20:11:03,383 INFO L410 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:11:03,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:11:03,384 INFO L82 PathProgramCache]: Analyzing trace with hash 898320404, now seen corresponding path program 1 times [2019-10-13 20:11:03,384 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:11:03,384 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498904689] [2019-10-13 20:11:03,385 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:11:03,385 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:11:03,385 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:11:03,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:11:03,512 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:11:03,512 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498904689] [2019-10-13 20:11:03,512 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:11:03,513 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 20:11:03,513 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654630612] [2019-10-13 20:11:03,514 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 20:11:03,514 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:11:03,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 20:11:03,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-13 20:11:03,515 INFO L87 Difference]: Start difference. First operand 4826 states and 5228 transitions. Second operand 4 states. [2019-10-13 20:11:05,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:11:05,605 INFO L93 Difference]: Finished difference Result 14725 states and 16087 transitions. [2019-10-13 20:11:05,607 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 20:11:05,607 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 212 [2019-10-13 20:11:05,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:11:05,608 INFO L225 Difference]: With dead ends: 14725 [2019-10-13 20:11:05,608 INFO L226 Difference]: Without dead ends: 0 [2019-10-13 20:11:05,629 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-13 20:11:05,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-10-13 20:11:05,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-10-13 20:11:05,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-10-13 20:11:05,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-10-13 20:11:05,632 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 212 [2019-10-13 20:11:05,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:11:05,632 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-10-13 20:11:05,632 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 20:11:05,632 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-10-13 20:11:05,633 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-10-13 20:11:05,638 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-10-13 20:11:05,807 WARN L191 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 100 [2019-10-13 20:11:06,238 WARN L191 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 100 [2019-10-13 20:11:06,666 WARN L191 SmtUtils]: Spent 412.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 42 [2019-10-13 20:11:07,475 WARN L191 SmtUtils]: Spent 758.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 40 [2019-10-13 20:11:08,253 WARN L191 SmtUtils]: Spent 770.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 40 [2019-10-13 20:11:09,002 WARN L191 SmtUtils]: Spent 742.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 40