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 --traceabstraction.trace.refinement.strategy SIFA_TAIPAN --sifa.abstract.domain CompoundDomain --rcfgbuilder.size.of.a.code.block LoopFreeBlock --sifa.call.summarizer TopInputCallSummarizer --sifa.fluid SizeLimitFluid --sifa.simplification.technique SIMPLIFY_QUICK -i ../../../trunk/examples/svcomp/eca-rers2012/Problem01_label34.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:40:05,461 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:40:05,464 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:40:05,481 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-10-15 01:40:05,504 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:40:05,507 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:40:05,510 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:40:05,511 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:40:05,513 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:40:05,514 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:40:05,516 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:40:05,521 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:40:05,526 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:40:05,529 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:40:05,530 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:40:05,530 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:40:05,534 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 01:40:05,545 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:40:05,546 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:40:05,547 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:40:05,548 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 [2019-10-15 01:40:05,566 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:40:05,566 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:40:05,570 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:40:05,570 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:40:05,571 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:40:05,571 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:40:05,571 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:40:05,571 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:40:05,571 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:40:05,572 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:40:05,573 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:40:05,573 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:40:05,573 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:40:05,573 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:40:05,574 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:40:05,574 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:40:05,574 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:40:05,574 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:40:05,574 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:40:05,575 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:40:05,575 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:40:05,575 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:40:05,575 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:40:05,576 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:40:05,576 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:40:05,576 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:40:05,576 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:40:05,576 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:40:05,577 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> SIFA_TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> CompoundDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> LoopFreeBlock Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Call Summarizer -> TopInputCallSummarizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Fluid -> SizeLimitFluid Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Simplification Technique -> SIMPLIFY_QUICK [2019-10-15 01:40:05,861 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:40:05,873 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:40:05,876 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:40:05,878 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:40:05,878 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:40:05,879 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem01_label34.c [2019-10-15 01:40:05,933 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2fd0f73f7/0a36d04275ce473989f4650707be3a09/FLAGf58f5ee4d [2019-10-15 01:40:06,497 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:40:06,501 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem01_label34.c [2019-10-15 01:40:06,521 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2fd0f73f7/0a36d04275ce473989f4650707be3a09/FLAGf58f5ee4d [2019-10-15 01:40:06,742 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2fd0f73f7/0a36d04275ce473989f4650707be3a09 [2019-10-15 01:40:06,752 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:40:06,753 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:40:06,754 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:40:06,754 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:40:06,758 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:40:06,758 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:40:06" (1/1) ... [2019-10-15 01:40:06,761 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19ba2018 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:40:06, skipping insertion in model container [2019-10-15 01:40:06,761 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:40:06" (1/1) ... [2019-10-15 01:40:06,769 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:40:06,824 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:40:07,228 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:40:07,240 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:40:07,502 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:40:07,531 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:40:07,532 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:40:07 WrapperNode [2019-10-15 01:40:07,533 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:40:07,534 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:40:07,534 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:40:07,534 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:40:07,553 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:40:07" (1/1) ... [2019-10-15 01:40:07,553 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:40:07" (1/1) ... [2019-10-15 01:40:07,590 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:40:07" (1/1) ... [2019-10-15 01:40:07,590 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:40:07" (1/1) ... [2019-10-15 01:40:07,638 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:40:07" (1/1) ... [2019-10-15 01:40:07,647 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:40:07" (1/1) ... [2019-10-15 01:40:07,651 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:40:07" (1/1) ... [2019-10-15 01:40:07,657 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:40:07,657 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:40:07,658 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:40:07,658 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:40:07,659 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:40:07" (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 [2019-10-15 01:40:07,720 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:40:07,720 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:40:07,720 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-15 01:40:07,721 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:40:07,721 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-15 01:40:07,721 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:40:07,721 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 01:40:07,721 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 01:40:07,721 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:40:07,722 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:40:07,722 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:40:09,482 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:40:09,482 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 01:40:09,483 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:40:09 BoogieIcfgContainer [2019-10-15 01:40:09,484 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:40:09,485 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:40:09,485 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:40:09,488 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:40:09,489 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:40:06" (1/3) ... [2019-10-15 01:40:09,490 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46ffdba5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:40:09, skipping insertion in model container [2019-10-15 01:40:09,490 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:40:07" (2/3) ... [2019-10-15 01:40:09,490 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46ffdba5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:40:09, skipping insertion in model container [2019-10-15 01:40:09,490 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:40:09" (3/3) ... [2019-10-15 01:40:09,492 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem01_label34.c [2019-10-15 01:40:09,501 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:40:09,509 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:40:09,520 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:40:09,545 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:40:09,545 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:40:09,546 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:40:09,546 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:40:09,546 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:40:09,546 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:40:09,546 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:40:09,547 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:40:09,567 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states. [2019-10-15 01:40:09,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2019-10-15 01:40:09,576 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:40:09,577 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, 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] [2019-10-15 01:40:09,579 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:40:09,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:40:09,584 INFO L82 PathProgramCache]: Analyzing trace with hash 826819684, now seen corresponding path program 1 times [2019-10-15 01:40:09,593 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:40:09,594 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710585326] [2019-10-15 01:40:09,594 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:40:09,594 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:40:09,595 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:40:09,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:40:10,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:40:10,035 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710585326] [2019-10-15 01:40:10,036 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:40:10,037 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:40:10,038 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827391073] [2019-10-15 01:40:10,045 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:40:10,046 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:40:10,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:40:10,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:40:10,066 INFO L87 Difference]: Start difference. First operand 86 states. Second operand 3 states. [2019-10-15 01:40:10,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:40:10,548 INFO L93 Difference]: Finished difference Result 246 states and 454 transitions. [2019-10-15 01:40:10,549 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:40:10,551 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 77 [2019-10-15 01:40:10,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:40:10,574 INFO L225 Difference]: With dead ends: 246 [2019-10-15 01:40:10,574 INFO L226 Difference]: Without dead ends: 157 [2019-10-15 01:40:10,579 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:40:10,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2019-10-15 01:40:10,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2019-10-15 01:40:10,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2019-10-15 01:40:10,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 285 transitions. [2019-10-15 01:40:10,672 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 285 transitions. Word has length 77 [2019-10-15 01:40:10,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:40:10,674 INFO L462 AbstractCegarLoop]: Abstraction has 157 states and 285 transitions. [2019-10-15 01:40:10,674 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:40:10,674 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 285 transitions. [2019-10-15 01:40:10,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2019-10-15 01:40:10,681 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:40:10,682 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-15 01:40:10,682 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:40:10,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:40:10,683 INFO L82 PathProgramCache]: Analyzing trace with hash -1022496549, now seen corresponding path program 1 times [2019-10-15 01:40:10,684 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:40:10,684 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612879353] [2019-10-15 01:40:10,684 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:40:10,684 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:40:10,685 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:40:10,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:40:10,818 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:40:10,819 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612879353] [2019-10-15 01:40:10,819 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:40:10,819 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-15 01:40:10,820 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478314680] [2019-10-15 01:40:10,822 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 01:40:10,822 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:40:10,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 01:40:10,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-15 01:40:10,823 INFO L87 Difference]: Start difference. First operand 157 states and 285 transitions. Second operand 5 states. [2019-10-15 01:40:11,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:40:11,340 INFO L93 Difference]: Finished difference Result 479 states and 892 transitions. [2019-10-15 01:40:11,341 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 01:40:11,341 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 86 [2019-10-15 01:40:11,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:40:11,346 INFO L225 Difference]: With dead ends: 479 [2019-10-15 01:40:11,346 INFO L226 Difference]: Without dead ends: 327 [2019-10-15 01:40:11,348 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 [2019-10-15 01:40:11,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2019-10-15 01:40:11,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 317. [2019-10-15 01:40:11,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 317 states. [2019-10-15 01:40:11,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 547 transitions. [2019-10-15 01:40:11,377 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 547 transitions. Word has length 86 [2019-10-15 01:40:11,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:40:11,378 INFO L462 AbstractCegarLoop]: Abstraction has 317 states and 547 transitions. [2019-10-15 01:40:11,378 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 01:40:11,378 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 547 transitions. [2019-10-15 01:40:11,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2019-10-15 01:40:11,381 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:40:11,382 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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] [2019-10-15 01:40:11,382 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:40:11,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:40:11,382 INFO L82 PathProgramCache]: Analyzing trace with hash -311202744, now seen corresponding path program 1 times [2019-10-15 01:40:11,383 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:40:11,383 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675533648] [2019-10-15 01:40:11,383 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:40:11,383 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:40:11,383 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:40:11,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:40:11,503 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 21 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:40:11,504 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675533648] [2019-10-15 01:40:11,504 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536381995] [2019-10-15 01:40:11,505 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 [2019-10-15 01:40:11,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:40:11,632 INFO L256 TraceCheckSpWp]: Trace formula consists of 422 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 01:40:11,641 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:40:11,774 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-15 01:40:11,774 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:40:11,833 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-15 01:40:11,834 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 01:40:11,834 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 7 [2019-10-15 01:40:11,835 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189796231] [2019-10-15 01:40:11,836 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:40:11,837 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:40:11,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:40:11,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-15 01:40:11,837 INFO L87 Difference]: Start difference. First operand 317 states and 547 transitions. Second operand 3 states. [2019-10-15 01:40:12,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:40:12,206 INFO L93 Difference]: Finished difference Result 935 states and 1648 transitions. [2019-10-15 01:40:12,207 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:40:12,207 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 97 [2019-10-15 01:40:12,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:40:12,212 INFO L225 Difference]: With dead ends: 935 [2019-10-15 01:40:12,213 INFO L226 Difference]: Without dead ends: 623 [2019-10-15 01:40:12,214 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 192 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-15 01:40:12,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 623 states. [2019-10-15 01:40:12,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 623 to 623. [2019-10-15 01:40:12,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 623 states. [2019-10-15 01:40:12,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 623 states to 623 states and 1060 transitions. [2019-10-15 01:40:12,258 INFO L78 Accepts]: Start accepts. Automaton has 623 states and 1060 transitions. Word has length 97 [2019-10-15 01:40:12,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:40:12,258 INFO L462 AbstractCegarLoop]: Abstraction has 623 states and 1060 transitions. [2019-10-15 01:40:12,259 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:40:12,259 INFO L276 IsEmpty]: Start isEmpty. Operand 623 states and 1060 transitions. [2019-10-15 01:40:12,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2019-10-15 01:40:12,263 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:40:12,263 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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] [2019-10-15 01:40:12,467 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:40:12,468 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:40:12,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:40:12,468 INFO L82 PathProgramCache]: Analyzing trace with hash -661428364, now seen corresponding path program 1 times [2019-10-15 01:40:12,469 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:40:12,469 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955975148] [2019-10-15 01:40:12,469 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:40:12,469 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:40:12,469 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:40:12,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:40:12,569 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 33 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:40:12,569 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955975148] [2019-10-15 01:40:12,569 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603743085] [2019-10-15 01:40:12,570 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:40:12,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:40:12,671 INFO L256 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 01:40:12,684 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:40:12,751 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 33 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:40:12,752 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:40:12,887 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 33 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:40:12,887 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1176939605] [2019-10-15 01:40:12,917 INFO L162 IcfgInterpreter]: Started Sifa with 81 locations of interest [2019-10-15 01:40:12,917 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:40:12,923 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:40:12,931 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:40:12,932 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:40:13,285 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 96 for LOIs [2019-10-15 01:40:15,181 INFO L199 IcfgInterpreter]: Interpreting procedure calculate_output with input of size 135 for LOIs [2019-10-15 01:40:15,699 WARN L191 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 137 [2019-10-15 01:40:16,102 WARN L191 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2019-10-15 01:40:16,257 WARN L191 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2019-10-15 01:40:16,366 WARN L191 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2019-10-15 01:40:16,640 WARN L191 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 143 [2019-10-15 01:40:16,756 WARN L191 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2019-10-15 01:40:16,912 WARN L191 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2019-10-15 01:40:17,263 WARN L191 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 143 [2019-10-15 01:40:17,384 WARN L191 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2019-10-15 01:40:17,538 WARN L191 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2019-10-15 01:40:17,746 WARN L191 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 142 [2019-10-15 01:40:17,947 WARN L191 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2019-10-15 01:40:18,428 WARN L191 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 142 [2019-10-15 01:40:18,773 WARN L191 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 142 [2019-10-15 01:40:18,877 WARN L191 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2019-10-15 01:40:19,130 WARN L191 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 142 [2019-10-15 01:40:19,977 WARN L191 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 142 [2019-10-15 01:40:21,299 WARN L191 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2019-10-15 01:40:21,510 WARN L191 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 142 [2019-10-15 01:40:22,123 WARN L191 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 142 [2019-10-15 01:40:22,456 WARN L191 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 142 [2019-10-15 01:40:23,677 WARN L191 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 141 [2019-10-15 01:40:24,269 WARN L191 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 141 [2019-10-15 01:40:27,021 WARN L191 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 141 [2019-10-15 01:40:35,536 WARN L191 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 189 DAG size of output: 176 [2019-10-15 01:40:35,538 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 22 [2019-10-15 01:40:36,812 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 219564 conjuctions. This might take some time...