/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_label48.c


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


This is Ultimate 0.1.24-fb55353
[2019-11-06 22:40:54,325 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2019-11-06 22:40:54,328 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2019-11-06 22:40:54,348 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2019-11-06 22:40:54,348 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2019-11-06 22:40:54,351 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2019-11-06 22:40:54,353 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2019-11-06 22:40:54,362 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2019-11-06 22:40:54,366 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2019-11-06 22:40:54,371 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
[2019-11-06 22:40:54,372 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
[2019-11-06 22:40:54,374 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2019-11-06 22:40:54,374 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2019-11-06 22:40:54,376 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2019-11-06 22:40:54,377 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2019-11-06 22:40:54,379 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2019-11-06 22:40:54,381 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2019-11-06 22:40:54,382 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2019-11-06 22:40:54,383 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2019-11-06 22:40:54,388 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2019-11-06 22:40:54,392 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2019-11-06 22:40:54,395 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2019-11-06 22:40:54,398 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2019-11-06 22:40:54,398 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2019-11-06 22:40:54,401 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
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[2019-11-06 22:40:54,401 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
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[2019-11-06 22:40:54,405 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
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[2019-11-06 22:40:54,409 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2019-11-06 22:40:54,410 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2019-11-06 22:40:54,411 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
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[2019-11-06 22:40:54,413 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
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[2019-11-06 22:40:54,415 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2019-11-06 22:40:54,415 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 22:40:54,454 INFO  L113        SettingsManager]: Loading preferences was successful
[2019-11-06 22:40:54,454 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2019-11-06 22:40:54,455 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2019-11-06 22:40:54,456 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2019-11-06 22:40:54,456 INFO  L138        SettingsManager]:  * Use SBE=true
[2019-11-06 22:40:54,456 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2019-11-06 22:40:54,456 INFO  L138        SettingsManager]:  * sizeof long=4
[2019-11-06 22:40:54,456 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2019-11-06 22:40:54,457 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2019-11-06 22:40:54,457 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2019-11-06 22:40:54,457 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2019-11-06 22:40:54,457 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2019-11-06 22:40:54,457 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2019-11-06 22:40:54,457 INFO  L138        SettingsManager]:  * sizeof long double=12
[2019-11-06 22:40:54,462 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2019-11-06 22:40:54,462 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2019-11-06 22:40:54,462 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2019-11-06 22:40:54,463 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2019-11-06 22:40:54,463 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2019-11-06 22:40:54,463 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2019-11-06 22:40:54,463 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2019-11-06 22:40:54,463 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2019-11-06 22:40:54,464 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2019-11-06 22:40:54,464 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2019-11-06 22:40:54,464 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2019-11-06 22:40:54,464 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2019-11-06 22:40:54,464 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2019-11-06 22:40:54,464 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2019-11-06 22:40:54,465 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 22:40:54,788 INFO  L81    nceAwareModelManager]: Repository-Root is: /tmp
[2019-11-06 22:40:54,802 INFO  L258   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2019-11-06 22:40:54,806 INFO  L214   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2019-11-06 22:40:54,807 INFO  L271        PluginConnector]: Initializing CDTParser...
[2019-11-06 22:40:54,808 INFO  L275        PluginConnector]: CDTParser initialized
[2019-11-06 22:40:54,809 INFO  L428   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem04_label48.c
[2019-11-06 22:40:54,871 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2ca3e2823/78aee77835a34b4bb9378541853da557/FLAG79ced881f
[2019-11-06 22:40:55,627 INFO  L306              CDTParser]: Found 1 translation units.
[2019-11-06 22:40:55,628 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem04_label48.c
[2019-11-06 22:40:55,662 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2ca3e2823/78aee77835a34b4bb9378541853da557/FLAG79ced881f
[2019-11-06 22:40:55,719 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2ca3e2823/78aee77835a34b4bb9378541853da557
[2019-11-06 22:40:55,730 INFO  L296   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2019-11-06 22:40:55,732 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2019-11-06 22:40:55,735 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2019-11-06 22:40:55,736 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2019-11-06 22:40:55,740 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2019-11-06 22:40:55,741 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:40:55" (1/1) ...
[2019-11-06 22:40:55,744 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25f9a9b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:40:55, skipping insertion in model container
[2019-11-06 22:40:55,744 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:40:55" (1/1) ...
[2019-11-06 22:40:55,754 INFO  L142         MainTranslator]: Starting translation in SV-COMP mode 
[2019-11-06 22:40:55,936 INFO  L173         MainTranslator]: Built tables and reachable declarations
[2019-11-06 22:40:57,458 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2019-11-06 22:40:57,467 INFO  L188         MainTranslator]: Completed pre-run
[2019-11-06 22:40:58,182 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2019-11-06 22:40:58,223 INFO  L192         MainTranslator]: Completed translation
[2019-11-06 22:40:58,223 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:40:58 WrapperNode
[2019-11-06 22:40:58,223 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2019-11-06 22:40:58,224 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2019-11-06 22:40:58,224 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2019-11-06 22:40:58,225 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2019-11-06 22:40:58,239 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:40:58" (1/1) ...
[2019-11-06 22:40:58,240 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:40:58" (1/1) ...
[2019-11-06 22:40:58,295 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:40:58" (1/1) ...
[2019-11-06 22:40:58,297 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:40:58" (1/1) ...
[2019-11-06 22:40:58,402 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:40:58" (1/1) ...
[2019-11-06 22:40:58,439 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:40:58" (1/1) ...
[2019-11-06 22:40:58,460 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:40:58" (1/1) ...
[2019-11-06 22:40:58,485 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2019-11-06 22:40:58,486 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2019-11-06 22:40:58,486 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2019-11-06 22:40:58,486 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2019-11-06 22:40:58,488 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:40:58" (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 22:40:58,556 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2019-11-06 22:40:58,556 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2019-11-06 22:40:58,557 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output
[2019-11-06 22:40:58,557 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output2
[2019-11-06 22:40:58,557 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output3
[2019-11-06 22:40:58,557 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output4
[2019-11-06 22:40:58,557 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2019-11-06 22:40:58,557 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output
[2019-11-06 22:40:58,558 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output2
[2019-11-06 22:40:58,558 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output3
[2019-11-06 22:40:58,558 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output4
[2019-11-06 22:40:58,558 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2019-11-06 22:40:58,558 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int
[2019-11-06 22:40:58,559 INFO  L130     BoogieDeclarations]: Found specification of procedure exit
[2019-11-06 22:40:58,559 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2019-11-06 22:40:58,559 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2019-11-06 22:40:58,560 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2019-11-06 22:41:02,966 INFO  L279             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2019-11-06 22:41:02,966 INFO  L284             CfgBuilder]: Removed 1 assume(true) statements.
[2019-11-06 22:41:02,969 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:41:02 BoogieIcfgContainer
[2019-11-06 22:41:02,969 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2019-11-06 22:41:02,970 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2019-11-06 22:41:02,970 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2019-11-06 22:41:02,974 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2019-11-06 22:41:02,974 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:40:55" (1/3) ...
[2019-11-06 22:41:02,975 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35fb702e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:41:02, skipping insertion in model container
[2019-11-06 22:41:02,975 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:40:58" (2/3) ...
[2019-11-06 22:41:02,976 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35fb702e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:41:02, skipping insertion in model container
[2019-11-06 22:41:02,977 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:41:02" (3/3) ...
[2019-11-06 22:41:02,983 INFO  L109   eAbstractionObserver]: Analyzing ICFG Problem04_label48.c
[2019-11-06 22:41:02,996 INFO  L152   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2019-11-06 22:41:03,007 INFO  L164   ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2019-11-06 22:41:03,018 INFO  L249      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2019-11-06 22:41:03,050 INFO  L373      AbstractCegarLoop]: Interprodecural is true
[2019-11-06 22:41:03,050 INFO  L374      AbstractCegarLoop]: Hoare is true
[2019-11-06 22:41:03,050 INFO  L375      AbstractCegarLoop]: Compute interpolants for FPandBP
[2019-11-06 22:41:03,051 INFO  L376      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2019-11-06 22:41:03,051 INFO  L377      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2019-11-06 22:41:03,051 INFO  L378      AbstractCegarLoop]: Difference is false
[2019-11-06 22:41:03,051 INFO  L379      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2019-11-06 22:41:03,051 INFO  L383      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2019-11-06 22:41:03,088 INFO  L276                IsEmpty]: Start isEmpty. Operand 906 states.
[2019-11-06 22:41:03,138 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 819
[2019-11-06 22:41:03,139 INFO  L402         BasicCegarLoop]: Found error trace
[2019-11-06 22:41:03,141 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, 1, 1, 1]
[2019-11-06 22:41:03,143 INFO  L410      AbstractCegarLoop]: === Iteration 1 === [calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-11-06 22:41:03,148 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-11-06 22:41:03,149 INFO  L82        PathProgramCache]: Analyzing trace with hash -211517669, now seen corresponding path program 1 times
[2019-11-06 22:41:03,159 INFO  L161   FreeRefinementEngine]: Executing refinement strategy TAIPAN
[2019-11-06 22:41:03,159 INFO  L337   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541347807]
[2019-11-06 22:41:03,160 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-11-06 22:41:03,607 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-06 22:41:05,265 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 22:41:05,266 INFO  L337   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541347807]
[2019-11-06 22:41:05,267 INFO  L218   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-11-06 22:41:05,267 INFO  L231   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2019-11-06 22:41:05,269 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654767437]
[2019-11-06 22:41:05,276 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 3 states
[2019-11-06 22:41:05,277 INFO  L141   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN
[2019-11-06 22:41:05,288 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2019-11-06 22:41:05,289 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2019-11-06 22:41:05,290 INFO  L87              Difference]: Start difference. First operand 906 states. Second operand 3 states.
[2019-11-06 22:41:10,381 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-11-06 22:41:10,382 INFO  L93              Difference]: Finished difference Result 2644 states and 5099 transitions.
[2019-11-06 22:41:10,383 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2019-11-06 22:41:10,386 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 818
[2019-11-06 22:41:10,398 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-11-06 22:41:10,462 INFO  L225             Difference]: With dead ends: 2644
[2019-11-06 22:41:10,462 INFO  L226             Difference]: Without dead ends: 1676
[2019-11-06 22:41:10,480 INFO  L630         BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 5 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2019-11-06 22:41:10,512 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 1676 states.
[2019-11-06 22:41:10,668 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 1676 to 1676.
[2019-11-06 22:41:10,670 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 1676 states.
[2019-11-06 22:41:10,680 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 1676 states to 1676 states and 2968 transitions.
[2019-11-06 22:41:10,683 INFO  L78                 Accepts]: Start accepts. Automaton has 1676 states and 2968 transitions. Word has length 818
[2019-11-06 22:41:10,686 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-11-06 22:41:10,686 INFO  L462      AbstractCegarLoop]: Abstraction has 1676 states and 2968 transitions.
[2019-11-06 22:41:10,686 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2019-11-06 22:41:10,687 INFO  L276                IsEmpty]: Start isEmpty. Operand 1676 states and 2968 transitions.
[2019-11-06 22:41:10,722 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 834
[2019-11-06 22:41:10,722 INFO  L402         BasicCegarLoop]: Found error trace
[2019-11-06 22:41:10,723 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, 1, 1, 1]
[2019-11-06 22:41:10,723 INFO  L410      AbstractCegarLoop]: === Iteration 2 === [calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-11-06 22:41:10,724 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-11-06 22:41:10,724 INFO  L82        PathProgramCache]: Analyzing trace with hash 2091473012, now seen corresponding path program 1 times
[2019-11-06 22:41:10,724 INFO  L161   FreeRefinementEngine]: Executing refinement strategy TAIPAN
[2019-11-06 22:41:10,724 INFO  L337   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648810036]
[2019-11-06 22:41:10,725 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-11-06 22:41:10,814 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-06 22:41:11,620 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 22:41:11,621 INFO  L337   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648810036]
[2019-11-06 22:41:11,621 INFO  L218   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-11-06 22:41:11,621 INFO  L231   FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6
[2019-11-06 22:41:11,621 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817057081]
[2019-11-06 22:41:11,625 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 6 states
[2019-11-06 22:41:11,625 INFO  L141   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN
[2019-11-06 22:41:11,626 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2019-11-06 22:41:11,626 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30
[2019-11-06 22:41:11,627 INFO  L87              Difference]: Start difference. First operand 1676 states and 2968 transitions. Second operand 6 states.
[2019-11-06 22:41:18,469 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-11-06 22:41:18,469 INFO  L93              Difference]: Finished difference Result 5125 states and 9149 transitions.
[2019-11-06 22:41:18,469 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. 
[2019-11-06 22:41:18,469 INFO  L78                 Accepts]: Start accepts. Automaton has 6 states. Word has length 833
[2019-11-06 22:41:18,470 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-11-06 22:41:18,492 INFO  L225             Difference]: With dead ends: 5125
[2019-11-06 22:41:18,492 INFO  L226             Difference]: Without dead ends: 3455
[2019-11-06 22:41:18,497 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 22:41:18,502 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 3455 states.
[2019-11-06 22:41:18,612 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 3455 to 3395.
[2019-11-06 22:41:18,613 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 3395 states.
[2019-11-06 22:41:18,623 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 3395 states to 3395 states and 5897 transitions.
[2019-11-06 22:41:18,624 INFO  L78                 Accepts]: Start accepts. Automaton has 3395 states and 5897 transitions. Word has length 833
[2019-11-06 22:41:18,624 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-11-06 22:41:18,624 INFO  L462      AbstractCegarLoop]: Abstraction has 3395 states and 5897 transitions.
[2019-11-06 22:41:18,624 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 6 states.
[2019-11-06 22:41:18,625 INFO  L276                IsEmpty]: Start isEmpty. Operand 3395 states and 5897 transitions.
[2019-11-06 22:41:18,639 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 847
[2019-11-06 22:41:18,640 INFO  L402         BasicCegarLoop]: Found error trace
[2019-11-06 22:41:18,641 INFO  L410         BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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]
[2019-11-06 22:41:18,641 INFO  L410      AbstractCegarLoop]: === Iteration 3 === [calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-11-06 22:41:18,641 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-11-06 22:41:18,642 INFO  L82        PathProgramCache]: Analyzing trace with hash 811279874, now seen corresponding path program 1 times
[2019-11-06 22:41:18,642 INFO  L161   FreeRefinementEngine]: Executing refinement strategy TAIPAN
[2019-11-06 22:41:18,642 INFO  L337   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493160594]
[2019-11-06 22:41:18,643 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-11-06 22:41:18,705 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-06 22:41:19,603 INFO  L134       CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-11-06 22:41:19,603 INFO  L337   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493160594]
[2019-11-06 22:41:19,604 INFO  L218   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-11-06 22:41:19,604 INFO  L231   FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6
[2019-11-06 22:41:19,605 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424462825]
[2019-11-06 22:41:19,608 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 6 states
[2019-11-06 22:41:19,609 INFO  L141   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN
[2019-11-06 22:41:19,609 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2019-11-06 22:41:19,610 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30
[2019-11-06 22:41:19,610 INFO  L87              Difference]: Start difference. First operand 3395 states and 5897 transitions. Second operand 6 states.
[2019-11-06 22:41:25,484 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-11-06 22:41:25,485 INFO  L93              Difference]: Finished difference Result 8634 states and 14906 transitions.
[2019-11-06 22:41:25,486 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2019-11-06 22:41:25,486 INFO  L78                 Accepts]: Start accepts. Automaton has 6 states. Word has length 846
[2019-11-06 22:41:25,487 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-11-06 22:41:25,514 INFO  L225             Difference]: With dead ends: 8634
[2019-11-06 22:41:25,515 INFO  L226             Difference]: Without dead ends: 5245
[2019-11-06 22:41:25,524 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 22:41:25,538 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 5245 states.
[2019-11-06 22:41:25,680 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 5245 to 5216.
[2019-11-06 22:41:25,681 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 5216 states.
[2019-11-06 22:41:25,702 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5216 states to 5216 states and 7991 transitions.
[2019-11-06 22:41:25,703 INFO  L78                 Accepts]: Start accepts. Automaton has 5216 states and 7991 transitions. Word has length 846
[2019-11-06 22:41:25,703 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-11-06 22:41:25,704 INFO  L462      AbstractCegarLoop]: Abstraction has 5216 states and 7991 transitions.
[2019-11-06 22:41:25,704 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 6 states.
[2019-11-06 22:41:25,704 INFO  L276                IsEmpty]: Start isEmpty. Operand 5216 states and 7991 transitions.
[2019-11-06 22:41:25,732 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 853
[2019-11-06 22:41:25,732 INFO  L402         BasicCegarLoop]: Found error trace
[2019-11-06 22:41:25,733 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, 1, 1, 1]
[2019-11-06 22:41:25,733 INFO  L410      AbstractCegarLoop]: === Iteration 4 === [calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-11-06 22:41:25,733 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-11-06 22:41:25,734 INFO  L82        PathProgramCache]: Analyzing trace with hash 2065083011, now seen corresponding path program 1 times
[2019-11-06 22:41:25,734 INFO  L161   FreeRefinementEngine]: Executing refinement strategy TAIPAN
[2019-11-06 22:41:25,734 INFO  L337   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608895939]
[2019-11-06 22:41:25,735 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-11-06 22:41:25,811 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-06 22:41:26,544 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 22:41:26,545 INFO  L337   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608895939]
[2019-11-06 22:41:26,545 INFO  L337   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183580786]
[2019-11-06 22:41:26,545 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 22:41:26,881 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-06 22:41:26,886 INFO  L256         TraceCheckSpWp]: Trace formula consists of 1236 conjuncts, 10 conjunts are in the unsatisfiable core
[2019-11-06 22:41:26,943 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
[2019-11-06 22:41:27,670 INFO  L134       CoverageAnalysis]: Checked inductivity of 43 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked.
[2019-11-06 22:41:27,670 INFO  L321         TraceCheckSpWp]: Computing backward predicates...
[2019-11-06 22:41:28,312 INFO  L134       CoverageAnalysis]: Checked inductivity of 43 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked.
[2019-11-06 22:41:28,312 INFO  L218   FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences.
[2019-11-06 22:41:28,313 INFO  L231   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 7
[2019-11-06 22:41:28,313 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337196215]
[2019-11-06 22:41:28,315 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 3 states
[2019-11-06 22:41:28,315 INFO  L141   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN
[2019-11-06 22:41:28,316 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2019-11-06 22:41:28,316 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42
[2019-11-06 22:41:28,316 INFO  L87              Difference]: Start difference. First operand 5216 states and 7991 transitions. Second operand 3 states.