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 --abstractinterpretationv2.abstract.domain IntervalDomain --traceabstraction.trace.refinement.strategy TAIPAN --traceabstraction.abstract.interpretation.mode USE_PREDICATES -i ../../../trunk/examples/svcomp/eca-rers2012/Problem04_label46.c


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


This is Ultimate 0.1.24-f4eb214f-m
[2019-10-13 20:01:07,323 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2019-10-13 20:01:07,326 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2019-10-13 20:01:07,338 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2019-10-13 20:01:07,338 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2019-10-13 20:01:07,340 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2019-10-13 20:01:07,341 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2019-10-13 20:01:07,343 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2019-10-13 20:01:07,344 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2019-10-13 20:01:07,345 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
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[2019-10-13 20:01:07,351 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2019-10-13 20:01:07,355 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2019-10-13 20:01:07,357 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2019-10-13 20:01:07,358 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2019-10-13 20:01:07,360 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2019-10-13 20:01:07,362 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2019-10-13 20:01:07,367 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2019-10-13 20:01:07,369 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2019-10-13 20:01:07,373 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2019-10-13 20:01:07,376 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2019-10-13 20:01:07,379 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2019-10-13 20:01:07,380 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2019-10-13 20:01:07,382 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2019-10-13 20:01:07,382 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2019-10-13 20:01:07,382 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2019-10-13 20:01:07,383 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2019-10-13 20:01:07,386 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
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[2019-10-13 20:01:07,389 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
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[2019-10-13 20:01:07,392 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2019-10-13 20:01:07,393 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2019-10-13 20:01:07,398 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2019-10-13 20:01:07,398 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
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[2019-10-13 20:01:07,399 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
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[2019-10-13 20:01:07,402 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2019-10-13 20:01:07,403 INFO  L101        SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf
[2019-10-13 20:01:07,425 INFO  L113        SettingsManager]: Loading preferences was successful
[2019-10-13 20:01:07,425 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2019-10-13 20:01:07,428 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2019-10-13 20:01:07,428 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2019-10-13 20:01:07,428 INFO  L138        SettingsManager]:  * Use SBE=true
[2019-10-13 20:01:07,428 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2019-10-13 20:01:07,429 INFO  L138        SettingsManager]:  * sizeof long=4
[2019-10-13 20:01:07,429 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2019-10-13 20:01:07,429 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2019-10-13 20:01:07,429 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2019-10-13 20:01:07,430 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2019-10-13 20:01:07,431 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2019-10-13 20:01:07,431 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2019-10-13 20:01:07,431 INFO  L138        SettingsManager]:  * sizeof long double=12
[2019-10-13 20:01:07,431 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2019-10-13 20:01:07,431 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2019-10-13 20:01:07,432 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2019-10-13 20:01:07,432 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2019-10-13 20:01:07,432 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2019-10-13 20:01:07,432 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2019-10-13 20:01:07,432 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2019-10-13 20:01:07,433 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2019-10-13 20:01:07,433 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2019-10-13 20:01:07,433 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2019-10-13 20:01:07,433 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2019-10-13 20:01:07,433 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2019-10-13 20:01:07,434 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2019-10-13 20:01:07,434 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2019-10-13 20:01:07,434 INFO  L138        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: Abstract domain -> IntervalDomain
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> TAIPAN
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Abstract interpretation Mode -> USE_PREDICATES
[2019-10-13 20:01:07,717 INFO  L81    nceAwareModelManager]: Repository-Root is: /tmp
[2019-10-13 20:01:07,730 INFO  L258   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2019-10-13 20:01:07,734 INFO  L214   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2019-10-13 20:01:07,735 INFO  L271        PluginConnector]: Initializing CDTParser...
[2019-10-13 20:01:07,736 INFO  L275        PluginConnector]: CDTParser initialized
[2019-10-13 20:01:07,736 INFO  L428   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem04_label46.c
[2019-10-13 20:01:07,816 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/87de3e14f/723bc97f68644f93863d084a8e462390/FLAGbf8255647
[2019-10-13 20:01:08,679 INFO  L306              CDTParser]: Found 1 translation units.
[2019-10-13 20:01:08,680 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem04_label46.c
[2019-10-13 20:01:08,726 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/87de3e14f/723bc97f68644f93863d084a8e462390/FLAGbf8255647
[2019-10-13 20:01:09,230 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/87de3e14f/723bc97f68644f93863d084a8e462390
[2019-10-13 20:01:09,240 INFO  L296   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2019-10-13 20:01:09,242 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2019-10-13 20:01:09,244 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2019-10-13 20:01:09,244 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2019-10-13 20:01:09,249 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2019-10-13 20:01:09,250 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:01:09" (1/1) ...
[2019-10-13 20:01:09,255 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5627da55 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:01:09, skipping insertion in model container
[2019-10-13 20:01:09,256 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:01:09" (1/1) ...
[2019-10-13 20:01:09,263 INFO  L142         MainTranslator]: Starting translation in SV-COMP mode 
[2019-10-13 20:01:09,440 INFO  L173         MainTranslator]: Built tables and reachable declarations
[2019-10-13 20:01:10,959 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2019-10-13 20:01:10,973 INFO  L188         MainTranslator]: Completed pre-run
[2019-10-13 20:01:11,816 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2019-10-13 20:01:11,851 INFO  L192         MainTranslator]: Completed translation
[2019-10-13 20:01:11,852 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:01:11 WrapperNode
[2019-10-13 20:01:11,853 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2019-10-13 20:01:11,853 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2019-10-13 20:01:11,854 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2019-10-13 20:01:11,854 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2019-10-13 20:01:11,869 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:01:11" (1/1) ...
[2019-10-13 20:01:11,870 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:01:11" (1/1) ...
[2019-10-13 20:01:11,923 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:01:11" (1/1) ...
[2019-10-13 20:01:11,924 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:01:11" (1/1) ...
[2019-10-13 20:01:12,021 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:01:11" (1/1) ...
[2019-10-13 20:01:12,052 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:01:11" (1/1) ...
[2019-10-13 20:01:12,076 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:01:11" (1/1) ...
[2019-10-13 20:01:12,105 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2019-10-13 20:01:12,106 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2019-10-13 20:01:12,106 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2019-10-13 20:01:12,106 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2019-10-13 20:01:12,108 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:01:11" (1/1) ...
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2019-10-13 20:01:12,177 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2019-10-13 20:01:12,177 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2019-10-13 20:01:12,178 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output
[2019-10-13 20:01:12,178 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output2
[2019-10-13 20:01:12,178 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output3
[2019-10-13 20:01:12,178 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output4
[2019-10-13 20:01:12,179 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2019-10-13 20:01:12,180 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output
[2019-10-13 20:01:12,180 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output2
[2019-10-13 20:01:12,180 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output3
[2019-10-13 20:01:12,181 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output4
[2019-10-13 20:01:12,181 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2019-10-13 20:01:12,181 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int
[2019-10-13 20:01:12,182 INFO  L130     BoogieDeclarations]: Found specification of procedure exit
[2019-10-13 20:01:12,182 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2019-10-13 20:01:12,182 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2019-10-13 20:01:12,183 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2019-10-13 20:01:16,753 INFO  L279             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2019-10-13 20:01:16,753 INFO  L284             CfgBuilder]: Removed 1 assume(true) statements.
[2019-10-13 20:01:16,755 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:01:16 BoogieIcfgContainer
[2019-10-13 20:01:16,755 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2019-10-13 20:01:16,756 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2019-10-13 20:01:16,756 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2019-10-13 20:01:16,759 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2019-10-13 20:01:16,759 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 08:01:09" (1/3) ...
[2019-10-13 20:01:16,760 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10dc8450 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:01:16, skipping insertion in model container
[2019-10-13 20:01:16,760 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:01:11" (2/3) ...
[2019-10-13 20:01:16,760 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10dc8450 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:01:16, skipping insertion in model container
[2019-10-13 20:01:16,761 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:01:16" (3/3) ...
[2019-10-13 20:01:16,765 INFO  L109   eAbstractionObserver]: Analyzing ICFG Problem04_label46.c
[2019-10-13 20:01:16,775 INFO  L152   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2019-10-13 20:01:16,786 INFO  L164   ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2019-10-13 20:01:16,799 INFO  L249      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2019-10-13 20:01:16,846 INFO  L373      AbstractCegarLoop]: Interprodecural is true
[2019-10-13 20:01:16,847 INFO  L374      AbstractCegarLoop]: Hoare is true
[2019-10-13 20:01:16,847 INFO  L375      AbstractCegarLoop]: Compute interpolants for FPandBP
[2019-10-13 20:01:16,847 INFO  L376      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2019-10-13 20:01:16,847 INFO  L377      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2019-10-13 20:01:16,847 INFO  L378      AbstractCegarLoop]: Difference is false
[2019-10-13 20:01:16,847 INFO  L379      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2019-10-13 20:01:16,847 INFO  L383      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2019-10-13 20:01:16,892 INFO  L276                IsEmpty]: Start isEmpty. Operand 906 states.
[2019-10-13 20:01:16,950 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 805
[2019-10-13 20:01:16,951 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-13 20:01:16,953 INFO  L380         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-10-13 20:01:16,955 INFO  L410      AbstractCegarLoop]: === Iteration 1 === [calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-13 20:01:16,961 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-13 20:01:16,962 INFO  L82        PathProgramCache]: Analyzing trace with hash 1865936323, now seen corresponding path program 1 times
[2019-10-13 20:01:16,972 INFO  L157   tionRefinementEngine]: Executing refinement strategy TAIPAN
[2019-10-13 20:01:16,973 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595638343]
[2019-10-13 20:01:16,974 INFO  L116   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 20:01:16,974 INFO  L116   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 20:01:16,974 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-13 20:01:17,491 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 20:01:18,806 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-10-13 20:01:18,807 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595638343]
[2019-10-13 20:01:18,808 INFO  L223   tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-10-13 20:01:18,808 INFO  L236   tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2019-10-13 20:01:18,808 INFO  L342   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335941262]
[2019-10-13 20:01:18,815 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 3 states
[2019-10-13 20:01:18,817 INFO  L137   tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN
[2019-10-13 20:01:18,828 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2019-10-13 20:01:18,829 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2019-10-13 20:01:18,831 INFO  L87              Difference]: Start difference. First operand 906 states. Second operand 3 states.
[2019-10-13 20:01:23,683 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-10-13 20:01:23,683 INFO  L93              Difference]: Finished difference Result 2644 states and 5099 transitions.
[2019-10-13 20:01:23,684 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2019-10-13 20:01:23,686 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 804
[2019-10-13 20:01:23,697 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-10-13 20:01:23,753 INFO  L225             Difference]: With dead ends: 2644
[2019-10-13 20:01:23,753 INFO  L226             Difference]: Without dead ends: 1676
[2019-10-13 20:01:23,772 INFO  L600         BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 6 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2019-10-13 20:01:23,802 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 1676 states.
[2019-10-13 20:01:23,943 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 1676 to 1676.
[2019-10-13 20:01:23,945 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 1676 states.
[2019-10-13 20:01:23,959 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 1676 states to 1676 states and 3016 transitions.
[2019-10-13 20:01:23,962 INFO  L78                 Accepts]: Start accepts. Automaton has 1676 states and 3016 transitions. Word has length 804
[2019-10-13 20:01:23,965 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-10-13 20:01:23,965 INFO  L462      AbstractCegarLoop]: Abstraction has 1676 states and 3016 transitions.
[2019-10-13 20:01:23,965 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2019-10-13 20:01:23,965 INFO  L276                IsEmpty]: Start isEmpty. Operand 1676 states and 3016 transitions.
[2019-10-13 20:01:24,011 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 813
[2019-10-13 20:01:24,012 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-13 20:01:24,013 INFO  L380         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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-10-13 20:01:24,014 INFO  L410      AbstractCegarLoop]: === Iteration 2 === [calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-13 20:01:24,014 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-13 20:01:24,015 INFO  L82        PathProgramCache]: Analyzing trace with hash -398097262, now seen corresponding path program 1 times
[2019-10-13 20:01:24,015 INFO  L157   tionRefinementEngine]: Executing refinement strategy TAIPAN
[2019-10-13 20:01:24,015 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619181384]
[2019-10-13 20:01:24,016 INFO  L116   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 20:01:24,016 INFO  L116   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 20:01:24,017 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-13 20:01:24,223 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 20:01:25,399 INFO  L134       CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-10-13 20:01:25,400 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619181384]
[2019-10-13 20:01:25,400 INFO  L223   tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-10-13 20:01:25,401 INFO  L236   tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2019-10-13 20:01:25,401 INFO  L342   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623218373]
[2019-10-13 20:01:25,404 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 4 states
[2019-10-13 20:01:25,405 INFO  L137   tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN
[2019-10-13 20:01:25,405 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2019-10-13 20:01:25,405 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2019-10-13 20:01:25,405 INFO  L87              Difference]: Start difference. First operand 1676 states and 3016 transitions. Second operand 4 states.
[2019-10-13 20:01:32,408 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-10-13 20:01:32,408 INFO  L93              Difference]: Finished difference Result 6682 states and 12167 transitions.
[2019-10-13 20:01:32,408 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2019-10-13 20:01:32,408 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 812
[2019-10-13 20:01:32,410 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-10-13 20:01:32,437 INFO  L225             Difference]: With dead ends: 6682
[2019-10-13 20:01:32,437 INFO  L226             Difference]: Without dead ends: 5012
[2019-10-13 20:01:32,443 INFO  L600         BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2019-10-13 20:01:32,450 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 5012 states.
[2019-10-13 20:01:32,556 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 5012 to 5012.
[2019-10-13 20:01:32,557 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 5012 states.
[2019-10-13 20:01:32,574 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5012 states to 5012 states and 7929 transitions.
[2019-10-13 20:01:32,575 INFO  L78                 Accepts]: Start accepts. Automaton has 5012 states and 7929 transitions. Word has length 812
[2019-10-13 20:01:32,576 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-10-13 20:01:32,577 INFO  L462      AbstractCegarLoop]: Abstraction has 5012 states and 7929 transitions.
[2019-10-13 20:01:32,577 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2019-10-13 20:01:32,577 INFO  L276                IsEmpty]: Start isEmpty. Operand 5012 states and 7929 transitions.
[2019-10-13 20:01:32,608 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 820
[2019-10-13 20:01:32,608 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-13 20:01:32,609 INFO  L380         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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-10-13 20:01:32,610 INFO  L410      AbstractCegarLoop]: === Iteration 3 === [calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-13 20:01:32,610 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-13 20:01:32,610 INFO  L82        PathProgramCache]: Analyzing trace with hash -978901284, now seen corresponding path program 1 times
[2019-10-13 20:01:32,611 INFO  L157   tionRefinementEngine]: Executing refinement strategy TAIPAN
[2019-10-13 20:01:32,611 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049021550]
[2019-10-13 20:01:32,611 INFO  L116   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 20:01:32,611 INFO  L116   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 20:01:32,611 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-13 20:01:32,665 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 20:01:33,335 INFO  L134       CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-10-13 20:01:33,336 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049021550]
[2019-10-13 20:01:33,336 INFO  L223   tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-10-13 20:01:33,336 INFO  L236   tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6
[2019-10-13 20:01:33,337 INFO  L342   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115095115]
[2019-10-13 20:01:33,338 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 6 states
[2019-10-13 20:01:33,338 INFO  L137   tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN
[2019-10-13 20:01:33,339 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2019-10-13 20:01:33,339 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30
[2019-10-13 20:01:33,339 INFO  L87              Difference]: Start difference. First operand 5012 states and 7929 transitions. Second operand 6 states.
[2019-10-13 20:01:40,380 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-10-13 20:01:40,380 INFO  L93              Difference]: Finished difference Result 12734 states and 20299 transitions.
[2019-10-13 20:01:40,382 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. 
[2019-10-13 20:01:40,382 INFO  L78                 Accepts]: Start accepts. Automaton has 6 states. Word has length 819
[2019-10-13 20:01:40,382 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-10-13 20:01:40,427 INFO  L225             Difference]: With dead ends: 12734
[2019-10-13 20:01:40,428 INFO  L226             Difference]: Without dead ends: 7728
[2019-10-13 20:01:40,440 INFO  L600         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
[2019-10-13 20:01:40,449 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 7728 states.
[2019-10-13 20:01:40,672 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 7728 to 7685.
[2019-10-13 20:01:40,673 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 7685 states.
[2019-10-13 20:01:40,706 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 7685 states to 7685 states and 11827 transitions.
[2019-10-13 20:01:40,707 INFO  L78                 Accepts]: Start accepts. Automaton has 7685 states and 11827 transitions. Word has length 819
[2019-10-13 20:01:40,707 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-10-13 20:01:40,708 INFO  L462      AbstractCegarLoop]: Abstraction has 7685 states and 11827 transitions.
[2019-10-13 20:01:40,708 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 6 states.
[2019-10-13 20:01:40,708 INFO  L276                IsEmpty]: Start isEmpty. Operand 7685 states and 11827 transitions.
[2019-10-13 20:01:40,747 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 839
[2019-10-13 20:01:40,748 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-13 20:01:40,748 INFO  L380         BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-10-13 20:01:40,749 INFO  L410      AbstractCegarLoop]: === Iteration 4 === [calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-13 20:01:40,749 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-13 20:01:40,750 INFO  L82        PathProgramCache]: Analyzing trace with hash 1705815851, now seen corresponding path program 1 times
[2019-10-13 20:01:40,750 INFO  L157   tionRefinementEngine]: Executing refinement strategy TAIPAN
[2019-10-13 20:01:40,751 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782262726]
[2019-10-13 20:01:40,751 INFO  L116   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 20:01:40,751 INFO  L116   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 20:01:40,752 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-13 20:01:40,834 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 20:01:41,448 INFO  L134       CoverageAnalysis]: Checked inductivity of 43 backedges. 41 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-10-13 20:01:41,449 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782262726]
[2019-10-13 20:01:41,449 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641500620]
[2019-10-13 20:01:41,450 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2019-10-13 20:01:41,772 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 20:01:41,778 INFO  L256         TraceCheckSpWp]: Trace formula consists of 1221 conjuncts, 10 conjunts are in the unsatisfiable core
[2019-10-13 20:01:41,836 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
[2019-10-13 20:01:42,501 INFO  L134       CoverageAnalysis]: Checked inductivity of 43 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked.
[2019-10-13 20:01:42,502 INFO  L321         TraceCheckSpWp]: Computing backward predicates...