/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/Problem02_label04.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-07 01:37:20,060 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-07 01:37:20,062 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-07 01:37:20,073 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-07 01:37:20,073 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-07 01:37:20,074 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-07 01:37:20,075 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-07 01:37:20,077 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-07 01:37:20,079 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-07 01:37:20,080 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-07 01:37:20,080 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-07 01:37:20,081 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-07 01:37:20,082 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-07 01:37:20,083 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-07 01:37:20,084 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-07 01:37:20,085 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-07 01:37:20,085 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-07 01:37:20,086 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-07 01:37:20,088 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-07 01:37:20,090 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-07 01:37:20,092 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-07 01:37:20,093 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-07 01:37:20,094 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-07 01:37:20,095 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-07 01:37:20,097 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-07 01:37:20,098 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-07 01:37:20,098 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-07 01:37:20,099 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-07 01:37:20,099 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-07 01:37:20,100 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-07 01:37:20,101 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-07 01:37:20,102 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-07 01:37:20,102 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-07 01:37:20,103 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-07 01:37:20,104 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-07 01:37:20,105 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-07 01:37:20,105 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-07 01:37:20,105 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-07 01:37:20,106 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-07 01:37:20,107 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-07 01:37:20,107 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-07 01:37:20,108 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 01:37:20,123 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-07 01:37:20,123 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-07 01:37:20,124 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-07 01:37:20,124 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-07 01:37:20,125 INFO L138 SettingsManager]: * Use SBE=true [2019-11-07 01:37:20,125 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-07 01:37:20,125 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-07 01:37:20,125 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-07 01:37:20,125 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-07 01:37:20,126 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-07 01:37:20,126 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-07 01:37:20,126 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-07 01:37:20,126 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-07 01:37:20,126 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-07 01:37:20,127 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-07 01:37:20,127 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-07 01:37:20,127 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-07 01:37:20,127 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-07 01:37:20,127 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-07 01:37:20,128 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-07 01:37:20,128 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-07 01:37:20,128 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 01:37:20,128 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-07 01:37:20,128 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-07 01:37:20,129 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-07 01:37:20,129 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-07 01:37:20,129 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-07 01:37:20,129 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-07 01:37:20,129 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 01:37:20,400 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-07 01:37:20,414 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-07 01:37:20,417 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-07 01:37:20,419 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-07 01:37:20,419 INFO L275 PluginConnector]: CDTParser initialized [2019-11-07 01:37:20,420 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem02_label04.c [2019-11-07 01:37:20,482 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f7c32d747/709796f1bc964491988fac7909acd576/FLAG264fb2847 [2019-11-07 01:37:21,072 INFO L306 CDTParser]: Found 1 translation units. [2019-11-07 01:37:21,073 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem02_label04.c [2019-11-07 01:37:21,088 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f7c32d747/709796f1bc964491988fac7909acd576/FLAG264fb2847 [2019-11-07 01:37:21,350 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f7c32d747/709796f1bc964491988fac7909acd576 [2019-11-07 01:37:21,378 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-07 01:37:21,380 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-07 01:37:21,388 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-07 01:37:21,388 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-07 01:37:21,394 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-07 01:37:21,401 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:37:21" (1/1) ... [2019-11-07 01:37:21,407 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d04c9f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:37:21, skipping insertion in model container [2019-11-07 01:37:21,407 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:37:21" (1/1) ... [2019-11-07 01:37:21,428 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-07 01:37:21,542 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-07 01:37:22,136 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 01:37:22,155 INFO L188 MainTranslator]: Completed pre-run [2019-11-07 01:37:22,243 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 01:37:22,263 INFO L192 MainTranslator]: Completed translation [2019-11-07 01:37:22,263 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:37:22 WrapperNode [2019-11-07 01:37:22,264 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-07 01:37:22,264 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-07 01:37:22,264 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-07 01:37:22,265 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-07 01:37:22,277 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:37:22" (1/1) ... [2019-11-07 01:37:22,277 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:37:22" (1/1) ... [2019-11-07 01:37:22,295 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:37:22" (1/1) ... [2019-11-07 01:37:22,295 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:37:22" (1/1) ... [2019-11-07 01:37:22,337 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:37:22" (1/1) ... [2019-11-07 01:37:22,351 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:37:22" (1/1) ... [2019-11-07 01:37:22,355 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:37:22" (1/1) ... [2019-11-07 01:37:22,361 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-07 01:37:22,362 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-07 01:37:22,362 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-07 01:37:22,362 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-07 01:37:22,363 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:37:22" (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 01:37:22,440 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-07 01:37:22,440 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-07 01:37:22,440 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-07 01:37:22,441 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-07 01:37:22,441 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-07 01:37:22,441 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-07 01:37:22,441 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-07 01:37:22,441 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-07 01:37:22,442 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-07 01:37:22,442 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-07 01:37:22,442 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-07 01:37:24,325 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-07 01:37:24,325 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-07 01:37:24,327 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:37:24 BoogieIcfgContainer [2019-11-07 01:37:24,327 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-07 01:37:24,328 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-07 01:37:24,328 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-07 01:37:24,331 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-07 01:37:24,332 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:37:21" (1/3) ... [2019-11-07 01:37:24,332 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1cace1a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:37:24, skipping insertion in model container [2019-11-07 01:37:24,333 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:37:22" (2/3) ... [2019-11-07 01:37:24,333 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1cace1a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:37:24, skipping insertion in model container [2019-11-07 01:37:24,333 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:37:24" (3/3) ... [2019-11-07 01:37:24,337 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem02_label04.c [2019-11-07 01:37:24,347 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-07 01:37:24,356 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-07 01:37:24,368 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-07 01:37:24,399 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-07 01:37:24,399 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-07 01:37:24,399 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-07 01:37:24,399 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-07 01:37:24,400 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-07 01:37:24,400 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-07 01:37:24,400 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-07 01:37:24,400 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-07 01:37:24,425 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states. [2019-11-07 01:37:24,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2019-11-07 01:37:24,438 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:37:24,439 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] [2019-11-07 01:37:24,442 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:37:24,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:37:24,448 INFO L82 PathProgramCache]: Analyzing trace with hash -219364041, now seen corresponding path program 1 times [2019-11-07 01:37:24,459 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:37:24,459 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314688933] [2019-11-07 01:37:24,459 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:37:24,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:37:24,858 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 01:37:24,859 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314688933] [2019-11-07 01:37:24,860 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:37:24,860 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 01:37:24,862 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504237035] [2019-11-07 01:37:24,868 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 01:37:24,868 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:37:24,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 01:37:24,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 01:37:24,886 INFO L87 Difference]: Start difference. First operand 95 states. Second operand 3 states. [2019-11-07 01:37:25,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:37:25,420 INFO L93 Difference]: Finished difference Result 273 states and 508 transitions. [2019-11-07 01:37:25,421 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 01:37:25,422 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 86 [2019-11-07 01:37:25,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:37:25,448 INFO L225 Difference]: With dead ends: 273 [2019-11-07 01:37:25,448 INFO L226 Difference]: Without dead ends: 175 [2019-11-07 01:37:25,455 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 01:37:25,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2019-11-07 01:37:25,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2019-11-07 01:37:25,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2019-11-07 01:37:25,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 327 transitions. [2019-11-07 01:37:25,529 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 327 transitions. Word has length 86 [2019-11-07 01:37:25,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:37:25,530 INFO L462 AbstractCegarLoop]: Abstraction has 175 states and 327 transitions. [2019-11-07 01:37:25,530 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 01:37:25,530 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 327 transitions. [2019-11-07 01:37:25,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2019-11-07 01:37:25,536 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:37:25,536 INFO L410 BasicCegarLoop]: trace histogram [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] [2019-11-07 01:37:25,536 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:37:25,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:37:25,537 INFO L82 PathProgramCache]: Analyzing trace with hash -1874059378, now seen corresponding path program 1 times [2019-11-07 01:37:25,537 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:37:25,537 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697730302] [2019-11-07 01:37:25,538 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:37:25,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:37:25,703 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:37:25,704 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697730302] [2019-11-07 01:37:25,704 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:37:25,704 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-07 01:37:25,704 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915663334] [2019-11-07 01:37:25,706 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-07 01:37:25,707 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:37:25,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-07 01:37:25,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-07 01:37:25,708 INFO L87 Difference]: Start difference. First operand 175 states and 327 transitions. Second operand 6 states. [2019-11-07 01:37:26,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:37:26,374 INFO L93 Difference]: Finished difference Result 547 states and 1064 transitions. [2019-11-07 01:37:26,375 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-07 01:37:26,375 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 101 [2019-11-07 01:37:26,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:37:26,382 INFO L225 Difference]: With dead ends: 547 [2019-11-07 01:37:26,382 INFO L226 Difference]: Without dead ends: 377 [2019-11-07 01:37:26,384 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 01:37:26,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2019-11-07 01:37:26,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 355. [2019-11-07 01:37:26,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 355 states. [2019-11-07 01:37:26,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 641 transitions. [2019-11-07 01:37:26,434 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 641 transitions. Word has length 101 [2019-11-07 01:37:26,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:37:26,435 INFO L462 AbstractCegarLoop]: Abstraction has 355 states and 641 transitions. [2019-11-07 01:37:26,435 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-07 01:37:26,435 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 641 transitions. [2019-11-07 01:37:26,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2019-11-07 01:37:26,439 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:37:26,440 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:37:26,440 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:37:26,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:37:26,441 INFO L82 PathProgramCache]: Analyzing trace with hash -852391129, now seen corresponding path program 1 times [2019-11-07 01:37:26,441 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:37:26,441 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077300080] [2019-11-07 01:37:26,441 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:37:26,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:37:26,572 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:37:26,572 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077300080] [2019-11-07 01:37:26,572 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:37:26,573 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-07 01:37:26,573 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653376601] [2019-11-07 01:37:26,573 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 01:37:26,574 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:37:26,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 01:37:26,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-07 01:37:26,574 INFO L87 Difference]: Start difference. First operand 355 states and 641 transitions. Second operand 4 states. [2019-11-07 01:37:27,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:37:27,277 INFO L93 Difference]: Finished difference Result 1307 states and 2498 transitions. [2019-11-07 01:37:27,278 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-07 01:37:27,278 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 112 [2019-11-07 01:37:27,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:37:27,290 INFO L225 Difference]: With dead ends: 1307 [2019-11-07 01:37:27,291 INFO L226 Difference]: Without dead ends: 957 [2019-11-07 01:37:27,296 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-07 01:37:27,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 957 states. [2019-11-07 01:37:27,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 957 to 957. [2019-11-07 01:37:27,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 957 states. [2019-11-07 01:37:27,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 1604 transitions. [2019-11-07 01:37:27,404 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 1604 transitions. Word has length 112 [2019-11-07 01:37:27,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:37:27,405 INFO L462 AbstractCegarLoop]: Abstraction has 957 states and 1604 transitions. [2019-11-07 01:37:27,405 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 01:37:27,405 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 1604 transitions. [2019-11-07 01:37:27,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2019-11-07 01:37:27,415 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:37:27,415 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-11-07 01:37:27,415 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:37:27,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:37:27,416 INFO L82 PathProgramCache]: Analyzing trace with hash -398110547, now seen corresponding path program 1 times [2019-11-07 01:37:27,416 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:37:27,416 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521109859] [2019-11-07 01:37:27,416 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:37:27,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:37:27,613 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 69 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-07 01:37:27,614 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521109859] [2019-11-07 01:37:27,614 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484539205] [2019-11-07 01:37:27,614 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 01:37:27,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:37:27,733 INFO L256 TraceCheckSpWp]: Trace formula consists of 475 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-07 01:37:27,744 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:37:27,843 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 82 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-07 01:37:27,844 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:37:27,970 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 82 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-07 01:37:27,971 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [348805972] [2019-11-07 01:37:28,025 INFO L159 IcfgInterpreter]: Started Sifa with 90 locations of interest [2019-11-07 01:37:28,025 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:37:28,033 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:37:28,039 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:37:28,039 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:37:28,204 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 89 for LOIs [2019-11-07 01:37:29,453 INFO L197 IcfgInterpreter]: Interpreting procedure calculate_output with input of size 83 for LOIs [2019-11-07 01:37:30,741 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 26 [2019-11-07 01:37:30,943 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 26 [2019-11-07 01:37:31,136 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 26 [2019-11-07 01:37:31,965 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 52 for LOIs [2019-11-07 01:37:31,971 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:37:32,200 WARN L191 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 74 [2019-11-07 01:37:32,569 WARN L191 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 64 [2019-11-07 01:37:32,886 WARN L191 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 70 [2019-11-07 01:37:33,182 WARN L191 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 76 [2019-11-07 01:37:33,426 WARN L191 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 68 [2019-11-07 01:37:33,647 WARN L191 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 65 [2019-11-07 01:37:33,863 WARN L191 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 67 [2019-11-07 01:37:34,161 WARN L191 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 85 [2019-11-07 01:37:34,456 WARN L191 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 72 [2019-11-07 01:37:34,966 WARN L191 SmtUtils]: Spent 447.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 77 [2019-11-07 01:37:35,344 WARN L191 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 80 [2019-11-07 01:37:35,644 WARN L191 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 85 [2019-11-07 01:37:35,919 WARN L191 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 88 [2019-11-07 01:37:36,208 WARN L191 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 82 [2019-11-07 01:37:36,509 WARN L191 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 83 [2019-11-07 01:37:36,848 WARN L191 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 83 [2019-11-07 01:37:37,152 WARN L191 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 87 [2019-11-07 01:37:37,459 WARN L191 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 85 [2019-11-07 01:37:37,752 WARN L191 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 82 [2019-11-07 01:37:38,050 WARN L191 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 81 [2019-11-07 01:37:38,374 WARN L191 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 85 [2019-11-07 01:37:38,672 WARN L191 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 81 [2019-11-07 01:37:38,983 WARN L191 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 82 [2019-11-07 01:37:39,348 WARN L191 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 82 [2019-11-07 01:37:39,675 WARN L191 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 82 [2019-11-07 01:37:40,065 WARN L191 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 88 [2019-11-07 01:37:40,347 WARN L191 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 80 [2019-11-07 01:37:40,670 WARN L191 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 82 [2019-11-07 01:37:41,005 WARN L191 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 81 [2019-11-07 01:37:41,360 WARN L191 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 86 [2019-11-07 01:37:41,934 WARN L191 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 82 [2019-11-07 01:37:42,357 WARN L191 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 86 [2019-11-07 01:37:42,688 WARN L191 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 82 [2019-11-07 01:37:43,047 WARN L191 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 82 [2019-11-07 01:37:43,374 WARN L191 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 80 [2019-11-07 01:37:43,741 WARN L191 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 86 [2019-11-07 01:37:44,136 WARN L191 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 87 [2019-11-07 01:37:44,509 WARN L191 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 88 [2019-11-07 01:37:44,884 WARN L191 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 82 [2019-11-07 01:37:45,335 WARN L191 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 86 [2019-11-07 01:37:45,761 WARN L191 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 87 [2019-11-07 01:37:45,809 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:37:45,809 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5, 44] total 56 [2019-11-07 01:37:45,810 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574174494] [2019-11-07 01:37:45,812 INFO L442 AbstractCegarLoop]: Interpolant automaton has 56 states [2019-11-07 01:37:45,812 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:37:45,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2019-11-07 01:37:45,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=339, Invalid=2741, Unknown=0, NotChecked=0, Total=3080 [2019-11-07 01:37:45,815 INFO L87 Difference]: Start difference. First operand 957 states and 1604 transitions. Second operand 56 states. [2019-11-07 01:37:46,131 WARN L191 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2019-11-07 01:37:46,528 WARN L191 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 91 [2019-11-07 01:37:46,946 WARN L191 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 97 [2019-11-07 01:37:47,390 WARN L191 SmtUtils]: Spent 360.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 94 [2019-11-07 01:37:47,775 WARN L191 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 90 [2019-11-07 01:37:48,493 WARN L191 SmtUtils]: Spent 624.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 93 [2019-11-07 01:37:48,847 WARN L191 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 79 [2019-11-07 01:37:49,251 WARN L191 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 78 [2019-11-07 01:37:49,513 WARN L191 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 74 [2019-11-07 01:37:49,727 WARN L191 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 77 [2019-11-07 01:37:50,999 WARN L191 SmtUtils]: Spent 1.20 s on a formula simplification. DAG size of input: 138 DAG size of output: 132 [2019-11-07 01:37:51,362 WARN L191 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 91 [2019-11-07 01:37:51,547 WARN L191 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 68 [2019-11-07 01:37:52,153 WARN L191 SmtUtils]: Spent 477.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 94 [2019-11-07 01:37:53,208 WARN L191 SmtUtils]: Spent 726.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 98 [2019-11-07 01:37:53,798 WARN L191 SmtUtils]: Spent 506.00 ms on a formula simplification. DAG size of input: 168 DAG size of output: 102 [2019-11-07 01:37:54,336 WARN L191 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 71 [2019-11-07 01:37:57,594 WARN L191 SmtUtils]: Spent 1.16 s on a formula simplification. DAG size of input: 139 DAG size of output: 132 [2019-11-07 01:37:58,266 WARN L191 SmtUtils]: Spent 608.00 ms on a formula simplification. DAG size of input: 192 DAG size of output: 95 [2019-11-07 01:37:59,811 WARN L191 SmtUtils]: Spent 1.09 s on a formula simplification. DAG size of input: 139 DAG size of output: 116 [2019-11-07 01:38:00,422 WARN L191 SmtUtils]: Spent 539.00 ms on a formula simplification. DAG size of input: 169 DAG size of output: 106 [2019-11-07 01:38:00,986 WARN L191 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 73 [2019-11-07 01:38:03,027 WARN L191 SmtUtils]: Spent 1.18 s on a formula simplification. DAG size of input: 141 DAG size of output: 132