/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/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/Problem03_label54.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-07 01:42:42,322 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2019-11-07 01:42:42,355 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-07 01:42:42,356 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-07 01:42:42,359 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-07 01:42:42,361 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-07 01:42:42,363 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-07 01:42:42,366 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-07 01:42:42,368 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-07 01:42:42,373 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-07 01:42:42,376 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-07 01:42:42,377 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-07 01:42:42,383 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-07 01:42:42,384 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-07 01:42:42,388 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-07 01:42:42,400 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-07 01:42:42,402 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-07 01:42:42,403 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-07 01:42:42,404 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 [2019-11-07 01:42:42,427 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-07 01:42:42,427 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-07 01:42:42,428 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-07 01:42:42,429 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-07 01:42:42,429 INFO L138 SettingsManager]: * Use SBE=true [2019-11-07 01:42:42,429 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-07 01:42:42,429 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-07 01:42:42,429 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-07 01:42:42,430 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-07 01:42:42,430 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-07 01:42:42,430 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-07 01:42:42,430 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-07 01:42:42,430 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-07 01:42:42,430 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-07 01:42:42,431 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-07 01:42:42,431 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-07 01:42:42,431 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-07 01:42:42,431 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-07 01:42:42,431 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-07 01:42:42,432 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-07 01:42:42,432 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-07 01:42:42,432 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 01:42:42,432 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-07 01:42:42,432 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-07 01:42:42,433 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-07 01:42:42,433 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-07 01:42:42,433 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-07 01:42:42,433 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-07 01:42:42,433 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 [2019-11-07 01:42:42,703 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-07 01:42:42,717 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-07 01:42:42,720 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-07 01:42:42,722 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-07 01:42:42,722 INFO L275 PluginConnector]: CDTParser initialized [2019-11-07 01:42:42,723 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label54.c [2019-11-07 01:42:42,796 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dac7f17a1/541ad3aa5618448cb8b29aab82378a03/FLAG1cbb7682a [2019-11-07 01:42:43,460 INFO L306 CDTParser]: Found 1 translation units. [2019-11-07 01:42:43,461 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label54.c [2019-11-07 01:42:43,477 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dac7f17a1/541ad3aa5618448cb8b29aab82378a03/FLAG1cbb7682a [2019-11-07 01:42:43,664 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dac7f17a1/541ad3aa5618448cb8b29aab82378a03 [2019-11-07 01:42:43,689 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-07 01:42:43,693 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-07 01:42:43,697 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-07 01:42:43,697 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-07 01:42:43,707 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-07 01:42:43,708 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:42:43" (1/1) ... [2019-11-07 01:42:43,717 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ab07c1d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:42:43, skipping insertion in model container [2019-11-07 01:42:43,717 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:42:43" (1/1) ... [2019-11-07 01:42:43,739 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-07 01:42:43,897 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-07 01:42:44,705 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 01:42:44,712 INFO L188 MainTranslator]: Completed pre-run [2019-11-07 01:42:45,114 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 01:42:45,143 INFO L192 MainTranslator]: Completed translation [2019-11-07 01:42:45,143 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:42:45 WrapperNode [2019-11-07 01:42:45,144 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-07 01:42:45,145 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-07 01:42:45,145 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-07 01:42:45,145 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-07 01:42:45,161 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:42:45" (1/1) ... [2019-11-07 01:42:45,161 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:42:45" (1/1) ... [2019-11-07 01:42:45,211 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:42:45" (1/1) ... [2019-11-07 01:42:45,211 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:42:45" (1/1) ... [2019-11-07 01:42:45,271 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:42:45" (1/1) ... [2019-11-07 01:42:45,290 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:42:45" (1/1) ... [2019-11-07 01:42:45,305 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:42:45" (1/1) ... [2019-11-07 01:42:45,323 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-07 01:42:45,323 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-07 01:42:45,323 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-07 01:42:45,324 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-07 01:42:45,325 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:42:45" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 01:42:45,398 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-07 01:42:45,398 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-07 01:42:45,398 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-07 01:42:45,399 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-07 01:42:45,399 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-07 01:42:45,399 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-07 01:42:45,399 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-07 01:42:45,400 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-07 01:42:45,400 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-07 01:42:45,400 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-07 01:42:45,400 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-07 01:42:48,537 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-07 01:42:48,538 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-07 01:42:48,539 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:42:48 BoogieIcfgContainer [2019-11-07 01:42:48,540 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-07 01:42:48,541 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-07 01:42:48,541 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-07 01:42:48,544 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-07 01:42:48,545 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:42:43" (1/3) ... [2019-11-07 01:42:48,546 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13078e72 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:42:48, skipping insertion in model container [2019-11-07 01:42:48,546 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:42:45" (2/3) ... [2019-11-07 01:42:48,547 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13078e72 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:42:48, skipping insertion in model container [2019-11-07 01:42:48,547 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:42:48" (3/3) ... [2019-11-07 01:42:48,549 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem03_label54.c [2019-11-07 01:42:48,594 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-07 01:42:48,602 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-07 01:42:48,614 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-07 01:42:48,641 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-07 01:42:48,641 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-07 01:42:48,642 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-07 01:42:48,642 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-07 01:42:48,642 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-07 01:42:48,642 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-07 01:42:48,642 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-07 01:42:48,642 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-07 01:42:48,666 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states. [2019-11-07 01:42:48,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2019-11-07 01:42:48,680 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:42:48,681 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:42:48,683 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:42:48,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:42:48,689 INFO L82 PathProgramCache]: Analyzing trace with hash 136469542, now seen corresponding path program 1 times [2019-11-07 01:42:48,699 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:42:48,699 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928189907] [2019-11-07 01:42:48,700 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:42:48,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:42:49,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:42:49,474 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928189907] [2019-11-07 01:42:49,476 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:42:49,476 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 01:42:49,479 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314355822] [2019-11-07 01:42:49,488 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 01:42:49,489 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:42:49,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 01:42:49,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 01:42:49,512 INFO L87 Difference]: Start difference. First operand 158 states. Second operand 3 states. [2019-11-07 01:42:50,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:42:50,696 INFO L93 Difference]: Finished difference Result 462 states and 886 transitions. [2019-11-07 01:42:50,696 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 01:42:50,698 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 149 [2019-11-07 01:42:50,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:42:50,726 INFO L225 Difference]: With dead ends: 462 [2019-11-07 01:42:50,727 INFO L226 Difference]: Without dead ends: 301 [2019-11-07 01:42:50,731 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 01:42:50,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2019-11-07 01:42:50,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 301. [2019-11-07 01:42:50,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 301 states. [2019-11-07 01:42:50,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 529 transitions. [2019-11-07 01:42:50,807 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 529 transitions. Word has length 149 [2019-11-07 01:42:50,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:42:50,809 INFO L462 AbstractCegarLoop]: Abstraction has 301 states and 529 transitions. [2019-11-07 01:42:50,809 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 01:42:50,809 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 529 transitions. [2019-11-07 01:42:50,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2019-11-07 01:42:50,815 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:42:50,815 INFO L410 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:42:50,815 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:42:50,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:42:50,816 INFO L82 PathProgramCache]: Analyzing trace with hash -1532432366, now seen corresponding path program 1 times [2019-11-07 01:42:50,816 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:42:50,816 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908534390] [2019-11-07 01:42:50,817 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:42:50,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:42:51,127 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:42:51,128 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908534390] [2019-11-07 01:42:51,128 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:42:51,128 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 01:42:51,129 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123233761] [2019-11-07 01:42:51,131 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 01:42:51,132 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:42:51,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 01:42:51,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 01:42:51,132 INFO L87 Difference]: Start difference. First operand 301 states and 529 transitions. Second operand 3 states. [2019-11-07 01:42:52,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:42:52,260 INFO L93 Difference]: Finished difference Result 891 states and 1588 transitions. [2019-11-07 01:42:52,260 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 01:42:52,261 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 161 [2019-11-07 01:42:52,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:42:52,269 INFO L225 Difference]: With dead ends: 891 [2019-11-07 01:42:52,269 INFO L226 Difference]: Without dead ends: 595 [2019-11-07 01:42:52,272 INFO L630 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 [2019-11-07 01:42:52,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2019-11-07 01:42:52,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 595. [2019-11-07 01:42:52,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 595 states. [2019-11-07 01:42:52,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 595 states to 595 states and 986 transitions. [2019-11-07 01:42:52,316 INFO L78 Accepts]: Start accepts. Automaton has 595 states and 986 transitions. Word has length 161 [2019-11-07 01:42:52,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:42:52,317 INFO L462 AbstractCegarLoop]: Abstraction has 595 states and 986 transitions. [2019-11-07 01:42:52,317 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 01:42:52,317 INFO L276 IsEmpty]: Start isEmpty. Operand 595 states and 986 transitions. [2019-11-07 01:42:52,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2019-11-07 01:42:52,323 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:42:52,323 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:42:52,324 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:42:52,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:42:52,324 INFO L82 PathProgramCache]: Analyzing trace with hash -943413387, now seen corresponding path program 1 times [2019-11-07 01:42:52,324 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:42:52,325 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332841286] [2019-11-07 01:42:52,325 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:42:52,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:42:52,452 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:42:52,452 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332841286] [2019-11-07 01:42:52,453 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277000555] [2019-11-07 01:42:52,453 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:42:52,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:42:52,715 INFO L256 TraceCheckSpWp]: Trace formula consists of 1004 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-07 01:42:52,728 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:42:52,817 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:42:52,817 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:42:52,987 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:42:52,988 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [595208109] [2019-11-07 01:42:53,025 INFO L159 IcfgInterpreter]: Started Sifa with 153 locations of interest [2019-11-07 01:42:53,026 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:42:53,034 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:42:53,041 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:42:53,042 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:42:53,430 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 208 for LOIs [2019-11-07 01:42:54,227 WARN L191 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 276 DAG size of output: 272 [2019-11-07 01:42:54,745 WARN L191 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 313 DAG size of output: 311 [2019-11-07 01:42:55,360 WARN L191 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 227 [2019-11-07 01:42:55,493 WARN L191 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 227 [2019-11-07 01:42:55,714 WARN L191 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 228 DAG size of output: 228 [2019-11-07 01:42:55,965 WARN L191 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 316 DAG size of output: 308 [2019-11-07 01:42:56,767 WARN L191 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 373 DAG size of output: 373 [2019-11-07 01:42:57,156 WARN L191 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 373 DAG size of output: 373 [2019-11-07 01:42:57,420 WARN L191 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 383 DAG size of output: 383 [2019-11-07 01:42:57,976 WARN L191 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 383 DAG size of output: 383 [2019-11-07 01:42:58,172 INFO L197 IcfgInterpreter]: Interpreting procedure calculate_output with input of size 172 for LOIs [2019-11-07 01:42:58,510 WARN L191 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 120 [2019-11-07 01:42:58,647 WARN L191 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 120 [2019-11-07 01:42:58,905 WARN L191 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 166 DAG size of output: 125 [2019-11-07 01:42:59,415 WARN L191 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 205 DAG size of output: 140 [2019-11-07 01:42:59,625 WARN L191 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2019-11-07 01:43:00,035 WARN L191 SmtUtils]: Spent 339.00 ms on a formula simplification. DAG size of input: 205 DAG size of output: 140 [2019-11-07 01:43:00,217 WARN L191 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2019-11-07 01:43:00,894 WARN L191 SmtUtils]: Spent 421.00 ms on a formula simplification. DAG size of input: 261 DAG size of output: 141 [2019-11-07 01:43:01,083 WARN L191 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 141 [2019-11-07 01:43:01,467 WARN L191 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 172 DAG size of output: 141 [2019-11-07 01:43:01,656 WARN L191 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 141 [2019-11-07 01:43:02,656 WARN L191 SmtUtils]: Spent 378.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 141 [2019-11-07 01:43:02,852 WARN L191 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 141 [2019-11-07 01:43:03,569 WARN L191 SmtUtils]: Spent 522.00 ms on a formula simplification. DAG size of input: 265 DAG size of output: 141 [2019-11-07 01:43:03,759 WARN L191 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 141 [2019-11-07 01:43:04,262 WARN L191 SmtUtils]: Spent 338.00 ms on a formula simplification. DAG size of input: 234 DAG size of output: 141 [2019-11-07 01:43:04,493 WARN L191 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 141 [2019-11-07 01:43:04,912 WARN L191 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 141 [2019-11-07 01:43:05,103 WARN L191 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 141 [2019-11-07 01:43:05,519 WARN L191 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 141 [2019-11-07 01:43:05,729 WARN L191 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 141 [2019-11-07 01:43:06,114 WARN L191 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 141 [2019-11-07 01:43:06,303 WARN L191 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 141 [2019-11-07 01:43:06,743 WARN L191 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 141 [2019-11-07 01:43:07,172 WARN L191 SmtUtils]: Spent 427.00 ms on a formula simplification that was a NOOP. DAG size: 141 [2019-11-07 01:43:08,052 WARN L191 SmtUtils]: Spent 658.00 ms on a formula simplification. DAG size of input: 237 DAG size of output: 141 [2019-11-07 01:43:08,243 WARN L191 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 141 [2019-11-07 01:43:08,864 WARN L191 SmtUtils]: Spent 402.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 141 [2019-11-07 01:43:09,070 WARN L191 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 141 [2019-11-07 01:43:09,501 WARN L191 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 141 [2019-11-07 01:43:09,743 WARN L191 SmtUtils]: Spent 241.00 ms on a formula simplification that was a NOOP. DAG size: 141 [2019-11-07 01:43:10,269 WARN L191 SmtUtils]: Spent 336.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 141 [2019-11-07 01:43:10,460 WARN L191 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 141 [2019-11-07 01:43:10,830 WARN L191 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 172 DAG size of output: 141 [2019-11-07 01:43:11,019 WARN L191 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 141 [2019-11-07 01:43:11,475 WARN L191 SmtUtils]: Spent 338.00 ms on a formula simplification. DAG size of input: 234 DAG size of output: 141 [2019-11-07 01:43:11,680 WARN L191 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 141 [2019-11-07 01:43:12,331 WARN L191 SmtUtils]: Spent 522.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 141 [2019-11-07 01:43:12,628 WARN L191 SmtUtils]: Spent 296.00 ms on a formula simplification that was a NOOP. DAG size: 141 [2019-11-07 01:43:13,022 WARN L191 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 141 [2019-11-07 01:43:13,216 WARN L191 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 141 [2019-11-07 01:43:13,834 WARN L191 SmtUtils]: Spent 396.00 ms on a formula simplification. DAG size of input: 265 DAG size of output: 141 [2019-11-07 01:43:14,023 WARN L191 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 141 [2019-11-07 01:43:14,641 WARN L191 SmtUtils]: Spent 504.00 ms on a formula simplification. DAG size of input: 234 DAG size of output: 141 [2019-11-07 01:43:14,868 WARN L191 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 141 [2019-11-07 01:43:15,574 WARN L191 SmtUtils]: Spent 453.00 ms on a formula simplification. DAG size of input: 172 DAG size of output: 141 [2019-11-07 01:43:15,956 WARN L191 SmtUtils]: Spent 380.00 ms on a formula simplification that was a NOOP. DAG size: 141 [2019-11-07 01:43:16,789 WARN L191 SmtUtils]: Spent 628.00 ms on a formula simplification. DAG size of input: 265 DAG size of output: 141 [2019-11-07 01:43:17,160 WARN L191 SmtUtils]: Spent 369.00 ms on a formula simplification that was a NOOP. DAG size: 141 [2019-11-07 01:43:18,122 WARN L191 SmtUtils]: Spent 746.00 ms on a formula simplification. DAG size of input: 234 DAG size of output: 141 [2019-11-07 01:43:18,488 WARN L191 SmtUtils]: Spent 364.00 ms on a formula simplification that was a NOOP. DAG size: 141 [2019-11-07 01:43:19,197 WARN L191 SmtUtils]: Spent 566.00 ms on a formula simplification. DAG size of input: 264 DAG size of output: 141 [2019-11-07 01:43:19,384 WARN L191 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 141 [2019-11-07 01:43:20,373 WARN L191 SmtUtils]: Spent 773.00 ms on a formula simplification. DAG size of input: 265 DAG size of output: 141 [2019-11-07 01:43:20,696 WARN L191 SmtUtils]: Spent 322.00 ms on a formula simplification that was a NOOP. DAG size: 141 [2019-11-07 01:43:21,049 WARN L191 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 172 DAG size of output: 141 [2019-11-07 01:43:21,303 WARN L191 SmtUtils]: Spent 253.00 ms on a formula simplification that was a NOOP. DAG size: 141 [2019-11-07 01:43:21,861 WARN L191 SmtUtils]: Spent 439.00 ms on a formula simplification. DAG size of input: 234 DAG size of output: 141 [2019-11-07 01:43:22,051 WARN L191 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 141 [2019-11-07 01:43:22,594 WARN L191 SmtUtils]: Spent 438.00 ms on a formula simplification. DAG size of input: 234 DAG size of output: 141