/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/Problem04_label53.c


--------------------------------------------------------------------------------


This is Ultimate 0.1.24-fb55353
[2019-11-07 01:44:49,572 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2019-11-07 01:44:49,575 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2019-11-07 01:44:49,590 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2019-11-07 01:44:49,591 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2019-11-07 01:44:49,592 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2019-11-07 01:44:49,593 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2019-11-07 01:44:49,595 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2019-11-07 01:44:49,597 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2019-11-07 01:44:49,597 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
[2019-11-07 01:44:49,598 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
[2019-11-07 01:44:49,600 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2019-11-07 01:44:49,600 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2019-11-07 01:44:49,601 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2019-11-07 01:44:49,602 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2019-11-07 01:44:49,603 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2019-11-07 01:44:49,604 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2019-11-07 01:44:49,604 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2019-11-07 01:44:49,606 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2019-11-07 01:44:49,608 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2019-11-07 01:44:49,610 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2019-11-07 01:44:49,611 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2019-11-07 01:44:49,612 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2019-11-07 01:44:49,613 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2019-11-07 01:44:49,616 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2019-11-07 01:44:49,620 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2019-11-07 01:44:49,620 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2019-11-07 01:44:49,621 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2019-11-07 01:44:49,621 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2019-11-07 01:44:49,622 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2019-11-07 01:44:49,623 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2019-11-07 01:44:49,623 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2019-11-07 01:44:49,624 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2019-11-07 01:44:49,627 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2019-11-07 01:44:49,631 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2019-11-07 01:44:49,631 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
[2019-11-07 01:44:49,632 INFO  L184        SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2019-11-07 01:44:49,632 INFO  L184        SettingsManager]: ReqParser provides no preferences, ignoring...
[2019-11-07 01:44:49,632 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
[2019-11-07 01:44:49,635 INFO  L181        SettingsManager]: Resetting Witness Parser preferences to default values
[2019-11-07 01:44:49,635 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2019-11-07 01:44:49,636 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 01:44:49,658 INFO  L113        SettingsManager]: Loading preferences was successful
[2019-11-07 01:44:49,658 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2019-11-07 01:44:49,660 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2019-11-07 01:44:49,661 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2019-11-07 01:44:49,661 INFO  L138        SettingsManager]:  * Use SBE=true
[2019-11-07 01:44:49,661 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2019-11-07 01:44:49,661 INFO  L138        SettingsManager]:  * sizeof long=4
[2019-11-07 01:44:49,662 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2019-11-07 01:44:49,662 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2019-11-07 01:44:49,662 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2019-11-07 01:44:49,663 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2019-11-07 01:44:49,663 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2019-11-07 01:44:49,663 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2019-11-07 01:44:49,664 INFO  L138        SettingsManager]:  * sizeof long double=12
[2019-11-07 01:44:49,664 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2019-11-07 01:44:49,664 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2019-11-07 01:44:49,664 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2019-11-07 01:44:49,665 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2019-11-07 01:44:49,665 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2019-11-07 01:44:49,665 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2019-11-07 01:44:49,666 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2019-11-07 01:44:49,666 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2019-11-07 01:44:49,666 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2019-11-07 01:44:49,666 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2019-11-07 01:44:49,666 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2019-11-07 01:44:49,667 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2019-11-07 01:44:49,667 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2019-11-07 01:44:49,667 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2019-11-07 01:44:49,667 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 01:44:49,950 INFO  L81    nceAwareModelManager]: Repository-Root is: /tmp
[2019-11-07 01:44:49,963 INFO  L258   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2019-11-07 01:44:49,967 INFO  L214   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2019-11-07 01:44:49,968 INFO  L271        PluginConnector]: Initializing CDTParser...
[2019-11-07 01:44:49,968 INFO  L275        PluginConnector]: CDTParser initialized
[2019-11-07 01:44:49,969 INFO  L428   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem04_label53.c
[2019-11-07 01:44:50,031 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6c40579aa/9e6f3b41146e4823925878b96667ad6c/FLAG1d7f1973a
[2019-11-07 01:44:50,832 INFO  L306              CDTParser]: Found 1 translation units.
[2019-11-07 01:44:50,833 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem04_label53.c
[2019-11-07 01:44:50,867 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6c40579aa/9e6f3b41146e4823925878b96667ad6c/FLAG1d7f1973a
[2019-11-07 01:44:51,318 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6c40579aa/9e6f3b41146e4823925878b96667ad6c
[2019-11-07 01:44:51,329 INFO  L296   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2019-11-07 01:44:51,330 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2019-11-07 01:44:51,332 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2019-11-07 01:44:51,332 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2019-11-07 01:44:51,335 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2019-11-07 01:44:51,336 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:44:51" (1/1) ...
[2019-11-07 01:44:51,339 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@58706db1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:44:51, skipping insertion in model container
[2019-11-07 01:44:51,340 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:44:51" (1/1) ...
[2019-11-07 01:44:51,348 INFO  L142         MainTranslator]: Starting translation in SV-COMP mode 
[2019-11-07 01:44:51,508 INFO  L173         MainTranslator]: Built tables and reachable declarations
[2019-11-07 01:44:52,975 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2019-11-07 01:44:52,990 INFO  L188         MainTranslator]: Completed pre-run
[2019-11-07 01:44:53,928 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2019-11-07 01:44:53,979 INFO  L192         MainTranslator]: Completed translation
[2019-11-07 01:44:53,980 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:44:53 WrapperNode
[2019-11-07 01:44:53,981 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2019-11-07 01:44:53,982 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2019-11-07 01:44:53,983 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2019-11-07 01:44:53,983 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2019-11-07 01:44:54,006 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:44:53" (1/1) ...
[2019-11-07 01:44:54,006 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:44:53" (1/1) ...
[2019-11-07 01:44:54,066 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:44:53" (1/1) ...
[2019-11-07 01:44:54,066 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:44:53" (1/1) ...
[2019-11-07 01:44:54,173 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:44:53" (1/1) ...
[2019-11-07 01:44:54,201 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:44:53" (1/1) ...
[2019-11-07 01:44:54,240 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:44:53" (1/1) ...
[2019-11-07 01:44:54,284 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2019-11-07 01:44:54,285 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2019-11-07 01:44:54,285 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2019-11-07 01:44:54,285 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2019-11-07 01:44:54,286 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:44:53" (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 01:44:54,355 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2019-11-07 01:44:54,356 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2019-11-07 01:44:54,356 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output
[2019-11-07 01:44:54,356 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output2
[2019-11-07 01:44:54,356 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output3
[2019-11-07 01:44:54,356 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output4
[2019-11-07 01:44:54,356 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2019-11-07 01:44:54,357 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output
[2019-11-07 01:44:54,357 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output2
[2019-11-07 01:44:54,357 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output3
[2019-11-07 01:44:54,357 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output4
[2019-11-07 01:44:54,357 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2019-11-07 01:44:54,358 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int
[2019-11-07 01:44:54,358 INFO  L130     BoogieDeclarations]: Found specification of procedure exit
[2019-11-07 01:44:54,358 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2019-11-07 01:44:54,358 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2019-11-07 01:44:54,358 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2019-11-07 01:44:59,686 INFO  L279             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2019-11-07 01:44:59,686 INFO  L284             CfgBuilder]: Removed 1 assume(true) statements.
[2019-11-07 01:44:59,692 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:44:59 BoogieIcfgContainer
[2019-11-07 01:44:59,692 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2019-11-07 01:44:59,693 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2019-11-07 01:44:59,694 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2019-11-07 01:44:59,697 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2019-11-07 01:44:59,697 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:44:51" (1/3) ...
[2019-11-07 01:44:59,698 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@796442ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:44:59, skipping insertion in model container
[2019-11-07 01:44:59,698 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:44:53" (2/3) ...
[2019-11-07 01:44:59,699 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@796442ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:44:59, skipping insertion in model container
[2019-11-07 01:44:59,699 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:44:59" (3/3) ...
[2019-11-07 01:44:59,704 INFO  L109   eAbstractionObserver]: Analyzing ICFG Problem04_label53.c
[2019-11-07 01:44:59,714 INFO  L152   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2019-11-07 01:44:59,724 INFO  L164   ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2019-11-07 01:44:59,735 INFO  L249      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2019-11-07 01:44:59,778 INFO  L373      AbstractCegarLoop]: Interprodecural is true
[2019-11-07 01:44:59,778 INFO  L374      AbstractCegarLoop]: Hoare is true
[2019-11-07 01:44:59,779 INFO  L375      AbstractCegarLoop]: Compute interpolants for FPandBP
[2019-11-07 01:44:59,779 INFO  L376      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2019-11-07 01:44:59,779 INFO  L377      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2019-11-07 01:44:59,779 INFO  L378      AbstractCegarLoop]: Difference is false
[2019-11-07 01:44:59,779 INFO  L379      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2019-11-07 01:44:59,779 INFO  L383      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2019-11-07 01:44:59,827 INFO  L276                IsEmpty]: Start isEmpty. Operand 785 states.
[2019-11-07 01:44:59,879 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 768
[2019-11-07 01:44:59,879 INFO  L402         BasicCegarLoop]: Found error trace
[2019-11-07 01:44:59,881 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:44:59,883 INFO  L410      AbstractCegarLoop]: === Iteration 1 === [calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-11-07 01:44:59,889 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-11-07 01:44:59,890 INFO  L82        PathProgramCache]: Analyzing trace with hash -1899131239, now seen corresponding path program 1 times
[2019-11-07 01:44:59,900 INFO  L161   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2019-11-07 01:44:59,900 INFO  L337   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872526875]
[2019-11-07 01:44:59,901 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-11-07 01:45:00,379 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-07 01:45:01,954 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 01:45:01,955 INFO  L337   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872526875]
[2019-11-07 01:45:01,956 INFO  L218   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-11-07 01:45:01,957 INFO  L231   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2019-11-07 01:45:01,959 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589319094]
[2019-11-07 01:45:01,966 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 3 states
[2019-11-07 01:45:01,966 INFO  L141   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2019-11-07 01:45:01,980 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2019-11-07 01:45:01,981 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2019-11-07 01:45:01,984 INFO  L87              Difference]: Start difference. First operand 785 states. Second operand 3 states.
[2019-11-07 01:45:06,418 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-11-07 01:45:06,418 INFO  L93              Difference]: Finished difference Result 2343 states and 4615 transitions.
[2019-11-07 01:45:06,418 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2019-11-07 01:45:06,420 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 767
[2019-11-07 01:45:06,428 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-11-07 01:45:06,481 INFO  L225             Difference]: With dead ends: 2343
[2019-11-07 01:45:06,481 INFO  L226             Difference]: Without dead ends: 1555
[2019-11-07 01:45:06,491 INFO  L630         BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 5 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 01:45:06,514 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 1555 states.
[2019-11-07 01:45:06,668 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 1555 to 1555.
[2019-11-07 01:45:06,670 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 1555 states.
[2019-11-07 01:45:06,679 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 1555 states to 1555 states and 3003 transitions.
[2019-11-07 01:45:06,681 INFO  L78                 Accepts]: Start accepts. Automaton has 1555 states and 3003 transitions. Word has length 767
[2019-11-07 01:45:06,686 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-11-07 01:45:06,686 INFO  L462      AbstractCegarLoop]: Abstraction has 1555 states and 3003 transitions.
[2019-11-07 01:45:06,686 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2019-11-07 01:45:06,688 INFO  L276                IsEmpty]: Start isEmpty. Operand 1555 states and 3003 transitions.
[2019-11-07 01:45:06,715 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 776
[2019-11-07 01:45:06,716 INFO  L402         BasicCegarLoop]: Found error trace
[2019-11-07 01:45:06,717 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:45:06,718 INFO  L410      AbstractCegarLoop]: === Iteration 2 === [calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-11-07 01:45:06,718 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-11-07 01:45:06,719 INFO  L82        PathProgramCache]: Analyzing trace with hash -1537901848, now seen corresponding path program 1 times
[2019-11-07 01:45:06,719 INFO  L161   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2019-11-07 01:45:06,719 INFO  L337   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330337634]
[2019-11-07 01:45:06,720 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-11-07 01:45:06,921 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-07 01:45:08,624 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 01:45:08,625 INFO  L337   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330337634]
[2019-11-07 01:45:08,626 INFO  L218   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-11-07 01:45:08,626 INFO  L231   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2019-11-07 01:45:08,626 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477434836]
[2019-11-07 01:45:08,630 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 3 states
[2019-11-07 01:45:08,630 INFO  L141   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2019-11-07 01:45:08,631 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2019-11-07 01:45:08,632 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2019-11-07 01:45:08,632 INFO  L87              Difference]: Start difference. First operand 1555 states and 3003 transitions. Second operand 3 states.
[2019-11-07 01:45:13,137 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-11-07 01:45:13,137 INFO  L93              Difference]: Finished difference Result 4653 states and 9046 transitions.
[2019-11-07 01:45:13,138 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2019-11-07 01:45:13,138 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 775
[2019-11-07 01:45:13,141 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-11-07 01:45:13,165 INFO  L225             Difference]: With dead ends: 4653
[2019-11-07 01:45:13,166 INFO  L226             Difference]: Without dead ends: 3103
[2019-11-07 01:45:13,173 INFO  L630         BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 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 01:45:13,179 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 3103 states.
[2019-11-07 01:45:13,294 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 3103 to 3103.
[2019-11-07 01:45:13,295 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 3103 states.
[2019-11-07 01:45:13,313 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 3103 states to 3103 states and 5509 transitions.
[2019-11-07 01:45:13,313 INFO  L78                 Accepts]: Start accepts. Automaton has 3103 states and 5509 transitions. Word has length 775
[2019-11-07 01:45:13,316 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-11-07 01:45:13,316 INFO  L462      AbstractCegarLoop]: Abstraction has 3103 states and 5509 transitions.
[2019-11-07 01:45:13,316 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2019-11-07 01:45:13,317 INFO  L276                IsEmpty]: Start isEmpty. Operand 3103 states and 5509 transitions.
[2019-11-07 01:45:13,370 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 787
[2019-11-07 01:45:13,370 INFO  L402         BasicCegarLoop]: Found error trace
[2019-11-07 01:45:13,372 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:45:13,373 INFO  L410      AbstractCegarLoop]: === Iteration 3 === [calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-11-07 01:45:13,374 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-11-07 01:45:13,375 INFO  L82        PathProgramCache]: Analyzing trace with hash -1772118306, now seen corresponding path program 1 times
[2019-11-07 01:45:13,375 INFO  L161   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2019-11-07 01:45:13,376 INFO  L337   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296584002]
[2019-11-07 01:45:13,377 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-11-07 01:45:13,557 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-07 01:45:15,675 INFO  L134       CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-11-07 01:45:15,676 INFO  L337   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296584002]
[2019-11-07 01:45:15,676 INFO  L337   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292845883]
[2019-11-07 01:45:15,676 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 01:45:16,024 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-07 01:45:16,031 INFO  L256         TraceCheckSpWp]: Trace formula consists of 1149 conjuncts, 10 conjunts are in the unsatisfiable core
[2019-11-07 01:45:16,077 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
[2019-11-07 01:45:17,068 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 01:45:17,068 INFO  L321         TraceCheckSpWp]: Computing backward predicates...
[2019-11-07 01:45:17,657 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 01:45:17,658 INFO  L218   FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences.
[2019-11-07 01:45:17,658 INFO  L231   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [7] total 9
[2019-11-07 01:45:17,659 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373655370]
[2019-11-07 01:45:17,661 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 4 states
[2019-11-07 01:45:17,661 INFO  L141   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2019-11-07 01:45:17,662 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2019-11-07 01:45:17,662 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72
[2019-11-07 01:45:17,662 INFO  L87              Difference]: Start difference. First operand 3103 states and 5509 transitions. Second operand 4 states.