/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_label43.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-07 01:42:30,539 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2019-11-07 01:42:30,578 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-07 01:42:30,580 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-07 01:42:30,582 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-07 01:42:30,584 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-07 01:42:30,586 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-07 01:42:30,590 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-07 01:42:30,592 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-07 01:42:30,597 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-07 01:42:30,602 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-07 01:42:30,604 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-07 01:42:30,607 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-07 01:42:30,607 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-07 01:42:30,610 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-07 01:42:30,622 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-07 01:42:30,623 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-07 01:42:30,624 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-07 01:42:30,624 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 01:42:30,644 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-07 01:42:30,644 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-07 01:42:30,646 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-07 01:42:30,646 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-07 01:42:30,646 INFO L138 SettingsManager]: * Use SBE=true [2019-11-07 01:42:30,647 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-07 01:42:30,647 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-07 01:42:30,647 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-07 01:42:30,647 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-07 01:42:30,647 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-07 01:42:30,648 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-07 01:42:30,649 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-07 01:42:30,649 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-07 01:42:30,649 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-07 01:42:30,650 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-07 01:42:30,650 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-07 01:42:30,650 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-07 01:42:30,650 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-07 01:42:30,650 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-07 01:42:30,651 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-07 01:42:30,651 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-07 01:42:30,651 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 01:42:30,651 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-07 01:42:30,651 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-07 01:42:30,652 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-07 01:42:30,652 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-07 01:42:30,652 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-07 01:42:30,652 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-07 01:42:30,652 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 01:42:30,952 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-07 01:42:30,966 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-07 01:42:30,969 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-07 01:42:30,971 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-07 01:42:30,971 INFO L275 PluginConnector]: CDTParser initialized [2019-11-07 01:42:30,972 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label43.c [2019-11-07 01:42:31,034 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4cfb0152f/227e74cd1f734a628050e59a4b99440c/FLAG25480acc0 [2019-11-07 01:42:31,682 INFO L306 CDTParser]: Found 1 translation units. [2019-11-07 01:42:31,683 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label43.c [2019-11-07 01:42:31,708 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4cfb0152f/227e74cd1f734a628050e59a4b99440c/FLAG25480acc0 [2019-11-07 01:42:31,869 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4cfb0152f/227e74cd1f734a628050e59a4b99440c [2019-11-07 01:42:31,880 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-07 01:42:31,881 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-07 01:42:31,885 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-07 01:42:31,885 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-07 01:42:31,889 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-07 01:42:31,890 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:42:31" (1/1) ... [2019-11-07 01:42:31,893 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d184af9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:42:31, skipping insertion in model container [2019-11-07 01:42:31,893 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:42:31" (1/1) ... [2019-11-07 01:42:31,902 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-07 01:42:31,982 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-07 01:42:32,782 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 01:42:32,799 INFO L188 MainTranslator]: Completed pre-run [2019-11-07 01:42:33,082 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 01:42:33,115 INFO L192 MainTranslator]: Completed translation [2019-11-07 01:42:33,116 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:42:33 WrapperNode [2019-11-07 01:42:33,117 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-07 01:42:33,118 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-07 01:42:33,118 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-07 01:42:33,119 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-07 01:42:33,133 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:42:33" (1/1) ... [2019-11-07 01:42:33,134 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:42:33" (1/1) ... [2019-11-07 01:42:33,185 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:42:33" (1/1) ... [2019-11-07 01:42:33,186 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:42:33" (1/1) ... [2019-11-07 01:42:33,251 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:42:33" (1/1) ... [2019-11-07 01:42:33,265 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:42:33" (1/1) ... [2019-11-07 01:42:33,291 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:42:33" (1/1) ... [2019-11-07 01:42:33,312 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-07 01:42:33,313 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-07 01:42:33,313 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-07 01:42:33,313 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-07 01:42:33,314 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:42:33" (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 01:42:33,382 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-07 01:42:33,383 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-07 01:42:33,383 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-07 01:42:33,383 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-07 01:42:33,383 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-07 01:42:33,384 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-07 01:42:33,385 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-07 01:42:33,385 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-07 01:42:33,385 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-07 01:42:33,385 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-07 01:42:33,385 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-07 01:42:36,493 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-07 01:42:36,494 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-07 01:42:36,495 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:42:36 BoogieIcfgContainer [2019-11-07 01:42:36,496 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-07 01:42:36,496 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-07 01:42:36,497 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-07 01:42:36,500 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-07 01:42:36,500 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:42:31" (1/3) ... [2019-11-07 01:42:36,501 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e818f99 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:42:36, skipping insertion in model container [2019-11-07 01:42:36,501 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:42:33" (2/3) ... [2019-11-07 01:42:36,502 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e818f99 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:42:36, skipping insertion in model container [2019-11-07 01:42:36,502 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:42:36" (3/3) ... [2019-11-07 01:42:36,504 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem03_label43.c [2019-11-07 01:42:36,514 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-07 01:42:36,524 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-07 01:42:36,536 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-07 01:42:36,565 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-07 01:42:36,565 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-07 01:42:36,565 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-07 01:42:36,566 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-07 01:42:36,566 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-07 01:42:36,566 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-07 01:42:36,566 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-07 01:42:36,566 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-07 01:42:36,591 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states. [2019-11-07 01:42:36,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2019-11-07 01:42:36,605 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:42:36,606 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 01:42:36,608 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:42:36,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:42:36,614 INFO L82 PathProgramCache]: Analyzing trace with hash 136465446, now seen corresponding path program 1 times [2019-11-07 01:42:36,625 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:42:36,625 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611305543] [2019-11-07 01:42:36,625 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:42:37,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:42:37,706 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 01:42:37,707 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611305543] [2019-11-07 01:42:37,708 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:42:37,708 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-07 01:42:37,710 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190199293] [2019-11-07 01:42:37,716 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 01:42:37,716 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:42:37,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 01:42:37,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-07 01:42:37,735 INFO L87 Difference]: Start difference. First operand 158 states. Second operand 4 states. [2019-11-07 01:42:39,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:42:39,254 INFO L93 Difference]: Finished difference Result 613 states and 1182 transitions. [2019-11-07 01:42:39,255 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-07 01:42:39,257 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 149 [2019-11-07 01:42:39,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:42:39,279 INFO L225 Difference]: With dead ends: 613 [2019-11-07 01:42:39,279 INFO L226 Difference]: Without dead ends: 448 [2019-11-07 01:42:39,284 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-07 01:42:39,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2019-11-07 01:42:39,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 301. [2019-11-07 01:42:39,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 301 states. [2019-11-07 01:42:39,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 570 transitions. [2019-11-07 01:42:39,361 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 570 transitions. Word has length 149 [2019-11-07 01:42:39,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:42:39,363 INFO L462 AbstractCegarLoop]: Abstraction has 301 states and 570 transitions. [2019-11-07 01:42:39,363 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 01:42:39,363 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 570 transitions. [2019-11-07 01:42:39,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2019-11-07 01:42:39,368 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:42:39,369 INFO L410 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2019-11-07 01:42:39,369 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:42:39,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:42:39,370 INFO L82 PathProgramCache]: Analyzing trace with hash 243766760, now seen corresponding path program 1 times [2019-11-07 01:42:39,370 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:42:39,370 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200962289] [2019-11-07 01:42:39,371 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:42:39,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:42:39,533 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:42:39,534 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200962289] [2019-11-07 01:42:39,534 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:42:39,534 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-07 01:42:39,534 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714002517] [2019-11-07 01:42:39,536 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-07 01:42:39,537 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:42:39,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-07 01:42:39,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-07 01:42:39,537 INFO L87 Difference]: Start difference. First operand 301 states and 570 transitions. Second operand 5 states. [2019-11-07 01:42:40,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:42:40,860 INFO L93 Difference]: Finished difference Result 917 states and 1764 transitions. [2019-11-07 01:42:40,860 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-07 01:42:40,861 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 157 [2019-11-07 01:42:40,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:42:40,867 INFO L225 Difference]: With dead ends: 917 [2019-11-07 01:42:40,867 INFO L226 Difference]: Without dead ends: 621 [2019-11-07 01:42:40,870 INFO L630 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 [2019-11-07 01:42:40,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 621 states. [2019-11-07 01:42:40,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 621 to 605. [2019-11-07 01:42:40,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 605 states. [2019-11-07 01:42:40,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 605 states to 605 states and 1112 transitions. [2019-11-07 01:42:40,935 INFO L78 Accepts]: Start accepts. Automaton has 605 states and 1112 transitions. Word has length 157 [2019-11-07 01:42:40,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:42:40,936 INFO L462 AbstractCegarLoop]: Abstraction has 605 states and 1112 transitions. [2019-11-07 01:42:40,936 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-07 01:42:40,936 INFO L276 IsEmpty]: Start isEmpty. Operand 605 states and 1112 transitions. [2019-11-07 01:42:40,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2019-11-07 01:42:40,943 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:42:40,944 INFO L410 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:42:40,945 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:42:40,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:42:40,945 INFO L82 PathProgramCache]: Analyzing trace with hash 558835389, now seen corresponding path program 1 times [2019-11-07 01:42:40,945 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:42:40,953 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268062085] [2019-11-07 01:42:40,953 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:42:40,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:42:41,065 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:42:41,066 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268062085] [2019-11-07 01:42:41,066 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:42:41,066 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-07 01:42:41,066 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124394624] [2019-11-07 01:42:41,067 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-07 01:42:41,067 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:42:41,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-07 01:42:41,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-07 01:42:41,068 INFO L87 Difference]: Start difference. First operand 605 states and 1112 transitions. Second operand 6 states. [2019-11-07 01:42:42,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:42:42,513 INFO L93 Difference]: Finished difference Result 1879 states and 3733 transitions. [2019-11-07 01:42:42,514 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-07 01:42:42,514 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 158 [2019-11-07 01:42:42,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:42:42,526 INFO L225 Difference]: With dead ends: 1879 [2019-11-07 01:42:42,526 INFO L226 Difference]: Without dead ends: 1279 [2019-11-07 01:42:42,529 INFO L630 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 [2019-11-07 01:42:42,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1279 states. [2019-11-07 01:42:42,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1279 to 1221. [2019-11-07 01:42:42,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1221 states. [2019-11-07 01:42:42,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1221 states to 1221 states and 2240 transitions. [2019-11-07 01:42:42,604 INFO L78 Accepts]: Start accepts. Automaton has 1221 states and 2240 transitions. Word has length 158 [2019-11-07 01:42:42,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:42:42,604 INFO L462 AbstractCegarLoop]: Abstraction has 1221 states and 2240 transitions. [2019-11-07 01:42:42,604 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-07 01:42:42,605 INFO L276 IsEmpty]: Start isEmpty. Operand 1221 states and 2240 transitions. [2019-11-07 01:42:42,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2019-11-07 01:42:42,611 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:42:42,611 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 01:42:42,611 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:42:42,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:42:42,612 INFO L82 PathProgramCache]: Analyzing trace with hash -1532436462, now seen corresponding path program 1 times [2019-11-07 01:42:42,612 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:42:42,612 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345581578] [2019-11-07 01:42:42,612 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:42:42,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:42:42,790 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 01:42:42,790 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345581578] [2019-11-07 01:42:42,790 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:42:42,791 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 01:42:42,791 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713118366] [2019-11-07 01:42:42,791 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 01:42:42,792 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:42:42,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 01:42:42,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 01:42:42,792 INFO L87 Difference]: Start difference. First operand 1221 states and 2240 transitions. Second operand 3 states. [2019-11-07 01:42:43,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:42:43,932 INFO L93 Difference]: Finished difference Result 3637 states and 6909 transitions. [2019-11-07 01:42:43,932 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 01:42:43,932 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 161 [2019-11-07 01:42:43,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:42:43,952 INFO L225 Difference]: With dead ends: 3637 [2019-11-07 01:42:43,952 INFO L226 Difference]: Without dead ends: 2421 [2019-11-07 01:42:43,956 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 01:42:43,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2421 states. [2019-11-07 01:42:44,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2421 to 2421. [2019-11-07 01:42:44,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2421 states. [2019-11-07 01:42:44,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2421 states to 2421 states and 4302 transitions. [2019-11-07 01:42:44,053 INFO L78 Accepts]: Start accepts. Automaton has 2421 states and 4302 transitions. Word has length 161 [2019-11-07 01:42:44,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:42:44,055 INFO L462 AbstractCegarLoop]: Abstraction has 2421 states and 4302 transitions. [2019-11-07 01:42:44,055 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 01:42:44,055 INFO L276 IsEmpty]: Start isEmpty. Operand 2421 states and 4302 transitions. [2019-11-07 01:42:44,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2019-11-07 01:42:44,065 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:42:44,065 INFO L410 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:42:44,065 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:42:44,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:42:44,066 INFO L82 PathProgramCache]: Analyzing trace with hash -2126716471, now seen corresponding path program 1 times [2019-11-07 01:42:44,066 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:42:44,067 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011593310] [2019-11-07 01:42:44,067 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:42:44,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:42:44,184 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:42:44,185 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011593310] [2019-11-07 01:42:44,185 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:42:44,185 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-07 01:42:44,185 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113778643] [2019-11-07 01:42:44,186 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-07 01:42:44,186 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:42:44,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-07 01:42:44,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-07 01:42:44,187 INFO L87 Difference]: Start difference. First operand 2421 states and 4302 transitions. Second operand 6 states. [2019-11-07 01:42:45,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:42:45,630 INFO L93 Difference]: Finished difference Result 7089 states and 14040 transitions. [2019-11-07 01:42:45,630 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-07 01:42:45,630 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 168 [2019-11-07 01:42:45,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:42:45,670 INFO L225 Difference]: With dead ends: 7089 [2019-11-07 01:42:45,670 INFO L226 Difference]: Without dead ends: 4673 [2019-11-07 01:42:45,680 INFO L630 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 [2019-11-07 01:42:45,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4673 states. [2019-11-07 01:42:45,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4673 to 4587. [2019-11-07 01:42:45,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4587 states. [2019-11-07 01:42:45,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4587 states to 4587 states and 7937 transitions. [2019-11-07 01:42:45,893 INFO L78 Accepts]: Start accepts. Automaton has 4587 states and 7937 transitions. Word has length 168 [2019-11-07 01:42:45,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:42:45,894 INFO L462 AbstractCegarLoop]: Abstraction has 4587 states and 7937 transitions. [2019-11-07 01:42:45,894 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-07 01:42:45,894 INFO L276 IsEmpty]: Start isEmpty. Operand 4587 states and 7937 transitions. [2019-11-07 01:42:45,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2019-11-07 01:42:45,912 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:42:45,912 INFO L410 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:42:45,912 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:42:45,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:42:45,913 INFO L82 PathProgramCache]: Analyzing trace with hash 700926954, now seen corresponding path program 1 times [2019-11-07 01:42:45,913 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:42:45,913 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597014294] [2019-11-07 01:42:45,913 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:42:45,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:42:46,037 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:42:46,037 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597014294] [2019-11-07 01:42:46,038 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:42:46,038 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-07 01:42:46,038 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125877405] [2019-11-07 01:42:46,039 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-07 01:42:46,039 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:42:46,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-07 01:42:46,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-07 01:42:46,040 INFO L87 Difference]: Start difference. First operand 4587 states and 7937 transitions. Second operand 6 states. [2019-11-07 01:42:47,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:42:47,467 INFO L93 Difference]: Finished difference Result 10680 states and 19949 transitions. [2019-11-07 01:42:47,468 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-07 01:42:47,468 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 171 [2019-11-07 01:42:47,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:42:47,513 INFO L225 Difference]: With dead ends: 10680 [2019-11-07 01:42:47,514 INFO L226 Difference]: Without dead ends: 6098 [2019-11-07 01:42:47,532 INFO L630 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 [2019-11-07 01:42:47,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6098 states. [2019-11-07 01:42:47,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6098 to 5964. [2019-11-07 01:42:47,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5964 states. [2019-11-07 01:42:47,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5964 states to 5964 states and 9941 transitions. [2019-11-07 01:42:47,827 INFO L78 Accepts]: Start accepts. Automaton has 5964 states and 9941 transitions. Word has length 171 [2019-11-07 01:42:47,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:42:47,827 INFO L462 AbstractCegarLoop]: Abstraction has 5964 states and 9941 transitions. [2019-11-07 01:42:47,827 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-07 01:42:47,827 INFO L276 IsEmpty]: Start isEmpty. Operand 5964 states and 9941 transitions. [2019-11-07 01:42:47,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2019-11-07 01:42:47,848 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:42:47,849 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1] [2019-11-07 01:42:47,849 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:42:47,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:42:47,855 INFO L82 PathProgramCache]: Analyzing trace with hash -561584426, now seen corresponding path program 1 times [2019-11-07 01:42:47,855 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:42:47,855 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575196165] [2019-11-07 01:42:47,856 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:42:47,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:42:48,060 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 38 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:42:48,061 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575196165] [2019-11-07 01:42:48,061 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679111882] [2019-11-07 01:42:48,061 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:42:48,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:42:48,341 INFO L256 TraceCheckSpWp]: Trace formula consists of 999 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-07 01:42:48,355 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:42:48,435 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-11-07 01:42:48,436 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:42:48,607 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 28 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-07 01:42:48,608 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 01:42:48,608 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 10 [2019-11-07 01:42:48,608 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557567918] [2019-11-07 01:42:48,609 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-07 01:42:48,609 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:42:48,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-07 01:42:48,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2019-11-07 01:42:48,610 INFO L87 Difference]: Start difference. First operand 5964 states and 9941 transitions. Second operand 5 states. [2019-11-07 01:42:50,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:42:50,266 INFO L93 Difference]: Finished difference Result 17184 states and 31006 transitions. [2019-11-07 01:42:50,267 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-07 01:42:50,267 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 183 [2019-11-07 01:42:50,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:42:50,343 INFO L225 Difference]: With dead ends: 17184 [2019-11-07 01:42:50,344 INFO L226 Difference]: Without dead ends: 11225 [2019-11-07 01:42:50,367 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 374 GetRequests, 363 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2019-11-07 01:42:50,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11225 states. [2019-11-07 01:42:50,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11225 to 11079. [2019-11-07 01:42:50,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11079 states. [2019-11-07 01:42:51,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11079 states to 11079 states and 18790 transitions. [2019-11-07 01:42:51,019 INFO L78 Accepts]: Start accepts. Automaton has 11079 states and 18790 transitions. Word has length 183 [2019-11-07 01:42:51,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:42:51,020 INFO L462 AbstractCegarLoop]: Abstraction has 11079 states and 18790 transitions. [2019-11-07 01:42:51,020 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-07 01:42:51,020 INFO L276 IsEmpty]: Start isEmpty. Operand 11079 states and 18790 transitions. [2019-11-07 01:42:51,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2019-11-07 01:42:51,058 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:42:51,059 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2019-11-07 01:42:51,268 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:42:51,268 INFO L410 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:42:51,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:42:51,269 INFO L82 PathProgramCache]: Analyzing trace with hash -733583127, now seen corresponding path program 1 times [2019-11-07 01:42:51,269 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:42:51,269 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690417639] [2019-11-07 01:42:51,269 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:42:51,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:42:51,432 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 56 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:42:51,433 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690417639] [2019-11-07 01:42:51,433 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180836345] [2019-11-07 01:42:51,433 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 [2019-11-07 01:42:51,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:42:51,660 INFO L256 TraceCheckSpWp]: Trace formula consists of 1003 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-07 01:42:51,670 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:42:51,716 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 56 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:42:51,717 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:42:51,790 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 56 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:42:51,790 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [560306900] [2019-11-07 01:42:51,858 INFO L159 IcfgInterpreter]: Started Sifa with 153 locations of interest [2019-11-07 01:42:51,858 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:42:51,868 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:42:51,879 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:42:51,879 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:42:52,312 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 206 for LOIs [2019-11-07 01:42:53,860 WARN L191 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 313 [2019-11-07 01:42:53,977 WARN L191 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 313 [2019-11-07 01:42:54,092 WARN L191 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 244 [2019-11-07 01:42:54,356 WARN L191 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 369 DAG size of output: 369 [2019-11-07 01:42:54,797 WARN L191 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 369 DAG size of output: 369 [2019-11-07 01:42:55,078 WARN L191 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 379 DAG size of output: 379 [2019-11-07 01:42:55,628 WARN L191 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 379 DAG size of output: 379 [2019-11-07 01:42:55,856 INFO L197 IcfgInterpreter]: Interpreting procedure calculate_output with input of size 170 for LOIs [2019-11-07 01:42:56,229 WARN L191 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 123 [2019-11-07 01:42:56,349 WARN L191 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2019-11-07 01:42:56,908 WARN L191 SmtUtils]: Spent 427.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 137 [2019-11-07 01:42:57,115 WARN L191 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 137 [2019-11-07 01:42:57,985 WARN L191 SmtUtils]: Spent 631.00 ms on a formula simplification. DAG size of input: 307 DAG size of output: 144 [2019-11-07 01:42:58,234 WARN L191 SmtUtils]: Spent 247.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2019-11-07 01:42:59,834 WARN L191 SmtUtils]: Spent 1.26 s on a formula simplification. DAG size of input: 343 DAG size of output: 148 [2019-11-07 01:43:00,237 WARN L191 SmtUtils]: Spent 401.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2019-11-07 01:43:00,816 WARN L191 SmtUtils]: Spent 380.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 148 [2019-11-07 01:43:01,085 WARN L191 SmtUtils]: Spent 268.00 ms on a formula simplification that was a NOOP. DAG size: 148