/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 --abstractinterpretationv2.abstract.domain IntervalDomain --traceabstraction.trace.refinement.strategy TAIPAN --traceabstraction.abstract.interpretation.mode USE_PREDICATES -i ../../../trunk/examples/svcomp/eca-rers2012/Problem04_label24.c


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


This is Ultimate 0.1.24-fb55353
[2019-11-06 22:39:57,295 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2019-11-06 22:39:57,297 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2019-11-06 22:39:57,309 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2019-11-06 22:39:57,309 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2019-11-06 22:39:57,310 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2019-11-06 22:39:57,312 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2019-11-06 22:39:57,313 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2019-11-06 22:39:57,315 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2019-11-06 22:39:57,316 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
[2019-11-06 22:39:57,317 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
[2019-11-06 22:39:57,318 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2019-11-06 22:39:57,318 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2019-11-06 22:39:57,319 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2019-11-06 22:39:57,320 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2019-11-06 22:39:57,321 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2019-11-06 22:39:57,322 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2019-11-06 22:39:57,323 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2019-11-06 22:39:57,325 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2019-11-06 22:39:57,327 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2019-11-06 22:39:57,328 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2019-11-06 22:39:57,329 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2019-11-06 22:39:57,330 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2019-11-06 22:39:57,331 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2019-11-06 22:39:57,333 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2019-11-06 22:39:57,334 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2019-11-06 22:39:57,334 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
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[2019-11-06 22:39:57,335 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
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[2019-11-06 22:39:57,337 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
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[2019-11-06 22:39:57,340 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2019-11-06 22:39:57,340 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
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[2019-11-06 22:39:57,341 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
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[2019-11-06 22:39:57,343 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2019-11-06 22:39:57,344 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
[2019-11-06 22:39:57,358 INFO  L113        SettingsManager]: Loading preferences was successful
[2019-11-06 22:39:57,359 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2019-11-06 22:39:57,360 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2019-11-06 22:39:57,360 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2019-11-06 22:39:57,361 INFO  L138        SettingsManager]:  * Use SBE=true
[2019-11-06 22:39:57,361 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2019-11-06 22:39:57,361 INFO  L138        SettingsManager]:  * sizeof long=4
[2019-11-06 22:39:57,361 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2019-11-06 22:39:57,361 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2019-11-06 22:39:57,363 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2019-11-06 22:39:57,363 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2019-11-06 22:39:57,363 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2019-11-06 22:39:57,364 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2019-11-06 22:39:57,364 INFO  L138        SettingsManager]:  * sizeof long double=12
[2019-11-06 22:39:57,364 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2019-11-06 22:39:57,364 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2019-11-06 22:39:57,364 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2019-11-06 22:39:57,365 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2019-11-06 22:39:57,366 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2019-11-06 22:39:57,366 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2019-11-06 22:39:57,366 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2019-11-06 22:39:57,366 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2019-11-06 22:39:57,367 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2019-11-06 22:39:57,367 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2019-11-06 22:39:57,367 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2019-11-06 22:39:57,367 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2019-11-06 22:39:57,368 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2019-11-06 22:39:57,368 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2019-11-06 22:39:57,369 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
[2019-11-06 22:39:57,655 INFO  L81    nceAwareModelManager]: Repository-Root is: /tmp
[2019-11-06 22:39:57,667 INFO  L258   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2019-11-06 22:39:57,671 INFO  L214   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2019-11-06 22:39:57,672 INFO  L271        PluginConnector]: Initializing CDTParser...
[2019-11-06 22:39:57,673 INFO  L275        PluginConnector]: CDTParser initialized
[2019-11-06 22:39:57,673 INFO  L428   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem04_label24.c
[2019-11-06 22:39:57,751 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/90c951156/62a4aa2a83724497838a0693730b59ad/FLAG1fc65faa3
[2019-11-06 22:39:58,561 INFO  L306              CDTParser]: Found 1 translation units.
[2019-11-06 22:39:58,562 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem04_label24.c
[2019-11-06 22:39:58,604 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/90c951156/62a4aa2a83724497838a0693730b59ad/FLAG1fc65faa3
[2019-11-06 22:39:59,034 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/90c951156/62a4aa2a83724497838a0693730b59ad
[2019-11-06 22:39:59,043 INFO  L296   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2019-11-06 22:39:59,045 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2019-11-06 22:39:59,046 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2019-11-06 22:39:59,046 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2019-11-06 22:39:59,049 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2019-11-06 22:39:59,050 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:39:59" (1/1) ...
[2019-11-06 22:39:59,054 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@56d482f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:39:59, skipping insertion in model container
[2019-11-06 22:39:59,054 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:39:59" (1/1) ...
[2019-11-06 22:39:59,063 INFO  L142         MainTranslator]: Starting translation in SV-COMP mode 
[2019-11-06 22:39:59,239 INFO  L173         MainTranslator]: Built tables and reachable declarations
[2019-11-06 22:40:00,737 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2019-11-06 22:40:00,748 INFO  L188         MainTranslator]: Completed pre-run
[2019-11-06 22:40:01,379 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2019-11-06 22:40:01,417 INFO  L192         MainTranslator]: Completed translation
[2019-11-06 22:40:01,417 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:40:01 WrapperNode
[2019-11-06 22:40:01,418 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2019-11-06 22:40:01,418 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2019-11-06 22:40:01,419 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2019-11-06 22:40:01,419 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2019-11-06 22:40:01,434 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:40:01" (1/1) ...
[2019-11-06 22:40:01,434 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:40:01" (1/1) ...
[2019-11-06 22:40:01,490 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:40:01" (1/1) ...
[2019-11-06 22:40:01,492 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:40:01" (1/1) ...
[2019-11-06 22:40:01,593 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:40:01" (1/1) ...
[2019-11-06 22:40:01,633 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:40:01" (1/1) ...
[2019-11-06 22:40:01,660 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:40:01" (1/1) ...
[2019-11-06 22:40:01,685 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2019-11-06 22:40:01,686 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2019-11-06 22:40:01,686 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2019-11-06 22:40:01,692 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2019-11-06 22:40:01,694 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:40:01" (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
[2019-11-06 22:40:01,765 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2019-11-06 22:40:01,766 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2019-11-06 22:40:01,766 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output
[2019-11-06 22:40:01,766 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output2
[2019-11-06 22:40:01,767 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output3
[2019-11-06 22:40:01,769 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output4
[2019-11-06 22:40:01,769 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2019-11-06 22:40:01,770 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output
[2019-11-06 22:40:01,770 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output2
[2019-11-06 22:40:01,772 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output3
[2019-11-06 22:40:01,772 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output4
[2019-11-06 22:40:01,773 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2019-11-06 22:40:01,773 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int
[2019-11-06 22:40:01,774 INFO  L130     BoogieDeclarations]: Found specification of procedure exit
[2019-11-06 22:40:01,774 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2019-11-06 22:40:01,774 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2019-11-06 22:40:01,775 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2019-11-06 22:40:06,478 INFO  L279             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2019-11-06 22:40:06,478 INFO  L284             CfgBuilder]: Removed 1 assume(true) statements.
[2019-11-06 22:40:06,482 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:40:06 BoogieIcfgContainer
[2019-11-06 22:40:06,482 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2019-11-06 22:40:06,483 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2019-11-06 22:40:06,484 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2019-11-06 22:40:06,487 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2019-11-06 22:40:06,487 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:39:59" (1/3) ...
[2019-11-06 22:40:06,488 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ef5cd91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:40:06, skipping insertion in model container
[2019-11-06 22:40:06,488 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:40:01" (2/3) ...
[2019-11-06 22:40:06,488 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ef5cd91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:40:06, skipping insertion in model container
[2019-11-06 22:40:06,489 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:40:06" (3/3) ...
[2019-11-06 22:40:06,492 INFO  L109   eAbstractionObserver]: Analyzing ICFG Problem04_label24.c
[2019-11-06 22:40:06,503 INFO  L152   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2019-11-06 22:40:06,513 INFO  L164   ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2019-11-06 22:40:06,526 INFO  L249      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2019-11-06 22:40:06,568 INFO  L373      AbstractCegarLoop]: Interprodecural is true
[2019-11-06 22:40:06,568 INFO  L374      AbstractCegarLoop]: Hoare is true
[2019-11-06 22:40:06,569 INFO  L375      AbstractCegarLoop]: Compute interpolants for FPandBP
[2019-11-06 22:40:06,569 INFO  L376      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2019-11-06 22:40:06,569 INFO  L377      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2019-11-06 22:40:06,569 INFO  L378      AbstractCegarLoop]: Difference is false
[2019-11-06 22:40:06,569 INFO  L379      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2019-11-06 22:40:06,570 INFO  L383      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2019-11-06 22:40:06,613 INFO  L276                IsEmpty]: Start isEmpty. Operand 906 states.
[2019-11-06 22:40:06,666 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 816
[2019-11-06 22:40:06,667 INFO  L402         BasicCegarLoop]: Found error trace
[2019-11-06 22:40:06,669 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-11-06 22:40:06,671 INFO  L410      AbstractCegarLoop]: === Iteration 1 === [calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-11-06 22:40:06,676 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-11-06 22:40:06,677 INFO  L82        PathProgramCache]: Analyzing trace with hash -832012102, now seen corresponding path program 1 times
[2019-11-06 22:40:06,687 INFO  L161   FreeRefinementEngine]: Executing refinement strategy TAIPAN
[2019-11-06 22:40:06,687 INFO  L337   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720016448]
[2019-11-06 22:40:06,688 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-11-06 22:40:07,181 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-06 22:40:09,115 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-11-06 22:40:09,116 INFO  L337   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720016448]
[2019-11-06 22:40:09,117 INFO  L218   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-11-06 22:40:09,117 INFO  L231   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2019-11-06 22:40:09,119 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609750610]
[2019-11-06 22:40:09,126 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 3 states
[2019-11-06 22:40:09,127 INFO  L141   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN
[2019-11-06 22:40:09,140 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2019-11-06 22:40:09,141 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2019-11-06 22:40:09,143 INFO  L87              Difference]: Start difference. First operand 906 states. Second operand 3 states.
[2019-11-06 22:40:13,873 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-11-06 22:40:13,873 INFO  L93              Difference]: Finished difference Result 2644 states and 5099 transitions.
[2019-11-06 22:40:13,874 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2019-11-06 22:40:13,875 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 815
[2019-11-06 22:40:13,888 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-11-06 22:40:13,942 INFO  L225             Difference]: With dead ends: 2644
[2019-11-06 22:40:13,943 INFO  L226             Difference]: Without dead ends: 1676
[2019-11-06 22:40:13,959 INFO  L630         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
[2019-11-06 22:40:13,991 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 1676 states.
[2019-11-06 22:40:14,158 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 1676 to 1676.
[2019-11-06 22:40:14,160 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 1676 states.
[2019-11-06 22:40:14,176 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 1676 states to 1676 states and 3016 transitions.
[2019-11-06 22:40:14,180 INFO  L78                 Accepts]: Start accepts. Automaton has 1676 states and 3016 transitions. Word has length 815
[2019-11-06 22:40:14,185 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-11-06 22:40:14,186 INFO  L462      AbstractCegarLoop]: Abstraction has 1676 states and 3016 transitions.
[2019-11-06 22:40:14,186 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2019-11-06 22:40:14,187 INFO  L276                IsEmpty]: Start isEmpty. Operand 1676 states and 3016 transitions.
[2019-11-06 22:40:14,243 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 824
[2019-11-06 22:40:14,244 INFO  L402         BasicCegarLoop]: Found error trace
[2019-11-06 22:40:14,245 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-11-06 22:40:14,246 INFO  L410      AbstractCegarLoop]: === Iteration 2 === [calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-11-06 22:40:14,246 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-11-06 22:40:14,247 INFO  L82        PathProgramCache]: Analyzing trace with hash 1791353483, now seen corresponding path program 1 times
[2019-11-06 22:40:14,247 INFO  L161   FreeRefinementEngine]: Executing refinement strategy TAIPAN
[2019-11-06 22:40:14,247 INFO  L337   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182436905]
[2019-11-06 22:40:14,248 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-11-06 22:40:14,473 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-06 22:40:15,862 INFO  L134       CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-11-06 22:40:15,862 INFO  L337   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182436905]
[2019-11-06 22:40:15,863 INFO  L218   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-11-06 22:40:15,863 INFO  L231   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2019-11-06 22:40:15,863 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301398522]
[2019-11-06 22:40:15,866 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 4 states
[2019-11-06 22:40:15,866 INFO  L141   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN
[2019-11-06 22:40:15,867 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2019-11-06 22:40:15,867 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2019-11-06 22:40:15,867 INFO  L87              Difference]: Start difference. First operand 1676 states and 3016 transitions. Second operand 4 states.
[2019-11-06 22:40:22,351 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-11-06 22:40:22,352 INFO  L93              Difference]: Finished difference Result 6682 states and 12172 transitions.
[2019-11-06 22:40:22,352 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2019-11-06 22:40:22,352 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 823
[2019-11-06 22:40:22,354 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-11-06 22:40:22,383 INFO  L225             Difference]: With dead ends: 6682
[2019-11-06 22:40:22,383 INFO  L226             Difference]: Without dead ends: 5012
[2019-11-06 22:40:22,389 INFO  L630         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
[2019-11-06 22:40:22,395 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 5012 states.
[2019-11-06 22:40:22,488 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 5012 to 5012.
[2019-11-06 22:40:22,488 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 5012 states.
[2019-11-06 22:40:22,505 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5012 states to 5012 states and 8510 transitions.
[2019-11-06 22:40:22,505 INFO  L78                 Accepts]: Start accepts. Automaton has 5012 states and 8510 transitions. Word has length 823
[2019-11-06 22:40:22,507 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-11-06 22:40:22,507 INFO  L462      AbstractCegarLoop]: Abstraction has 5012 states and 8510 transitions.
[2019-11-06 22:40:22,507 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2019-11-06 22:40:22,507 INFO  L276                IsEmpty]: Start isEmpty. Operand 5012 states and 8510 transitions.
[2019-11-06 22:40:22,527 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 831
[2019-11-06 22:40:22,527 INFO  L402         BasicCegarLoop]: Found error trace
[2019-11-06 22:40:22,528 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-11-06 22:40:22,529 INFO  L410      AbstractCegarLoop]: === Iteration 3 === [calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-11-06 22:40:22,529 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-11-06 22:40:22,529 INFO  L82        PathProgramCache]: Analyzing trace with hash -1161507327, now seen corresponding path program 1 times
[2019-11-06 22:40:22,530 INFO  L161   FreeRefinementEngine]: Executing refinement strategy TAIPAN
[2019-11-06 22:40:22,530 INFO  L337   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303952329]
[2019-11-06 22:40:22,530 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-11-06 22:40:22,604 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-06 22:40:23,407 INFO  L134       CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-11-06 22:40:23,407 INFO  L337   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303952329]
[2019-11-06 22:40:23,408 INFO  L218   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-11-06 22:40:23,408 INFO  L231   FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6
[2019-11-06 22:40:23,408 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146036042]
[2019-11-06 22:40:23,410 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 6 states
[2019-11-06 22:40:23,410 INFO  L141   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN
[2019-11-06 22:40:23,410 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2019-11-06 22:40:23,411 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30
[2019-11-06 22:40:23,411 INFO  L87              Difference]: Start difference. First operand 5012 states and 8510 transitions. Second operand 6 states.
[2019-11-06 22:40:30,095 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-11-06 22:40:30,096 INFO  L93              Difference]: Finished difference Result 11858 states and 20191 transitions.
[2019-11-06 22:40:30,098 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. 
[2019-11-06 22:40:30,098 INFO  L78                 Accepts]: Start accepts. Automaton has 6 states. Word has length 830
[2019-11-06 22:40:30,098 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-11-06 22:40:30,141 INFO  L225             Difference]: With dead ends: 11858
[2019-11-06 22:40:30,141 INFO  L226             Difference]: Without dead ends: 6852
[2019-11-06 22:40:30,155 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
[2019-11-06 22:40:30,171 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 6852 states.
[2019-11-06 22:40:30,313 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 6852 to 6815.
[2019-11-06 22:40:30,313 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 6815 states.
[2019-11-06 22:40:30,330 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6815 states to 6815 states and 11234 transitions.
[2019-11-06 22:40:30,331 INFO  L78                 Accepts]: Start accepts. Automaton has 6815 states and 11234 transitions. Word has length 830
[2019-11-06 22:40:30,331 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-11-06 22:40:30,331 INFO  L462      AbstractCegarLoop]: Abstraction has 6815 states and 11234 transitions.
[2019-11-06 22:40:30,331 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 6 states.
[2019-11-06 22:40:30,331 INFO  L276                IsEmpty]: Start isEmpty. Operand 6815 states and 11234 transitions.
[2019-11-06 22:40:30,355 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 850
[2019-11-06 22:40:30,356 INFO  L402         BasicCegarLoop]: Found error trace
[2019-11-06 22:40:30,356 INFO  L410         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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-11-06 22:40:30,357 INFO  L410      AbstractCegarLoop]: === Iteration 4 === [calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-11-06 22:40:30,357 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-11-06 22:40:30,357 INFO  L82        PathProgramCache]: Analyzing trace with hash 357322322, now seen corresponding path program 1 times
[2019-11-06 22:40:30,358 INFO  L161   FreeRefinementEngine]: Executing refinement strategy TAIPAN
[2019-11-06 22:40:30,358 INFO  L337   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267610331]
[2019-11-06 22:40:30,358 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-11-06 22:40:30,418 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-06 22:40:30,956 INFO  L134       CoverageAnalysis]: Checked inductivity of 43 backedges. 41 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-11-06 22:40:30,957 INFO  L337   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267610331]
[2019-11-06 22:40:30,957 INFO  L337   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939359451]
[2019-11-06 22:40:30,957 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
[2019-11-06 22:40:31,264 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-06 22:40:31,269 INFO  L256         TraceCheckSpWp]: Trace formula consists of 1233 conjuncts, 10 conjunts are in the unsatisfiable core
[2019-11-06 22:40:31,302 INFO  L279         TraceCheckSpWp]: Computing forward predicates...