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_label41.c


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


This is Ultimate 0.1.24-13a467a-m
[2019-10-14 23:59:54,816 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2019-10-14 23:59:54,819 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2019-10-14 23:59:54,835 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2019-10-14 23:59:54,835 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2019-10-14 23:59:54,836 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2019-10-14 23:59:54,837 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
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[2019-10-14 23:59:54,841 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
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[2019-10-14 23:59:54,844 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2019-10-14 23:59:54,845 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2019-10-14 23:59:54,846 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2019-10-14 23:59:54,847 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2019-10-14 23:59:54,847 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2019-10-14 23:59:54,848 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2019-10-14 23:59:54,850 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2019-10-14 23:59:54,852 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2019-10-14 23:59:54,854 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2019-10-14 23:59:54,855 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2019-10-14 23:59:54,856 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2019-10-14 23:59:54,856 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2019-10-14 23:59:54,859 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
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[2019-10-14 23:59:54,859 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
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[2019-10-14 23:59:54,864 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
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[2019-10-14 23:59:54,866 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
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[2019-10-14 23:59:54,868 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2019-10-14 23:59:54,869 INFO  L101        SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf
[2019-10-14 23:59:54,892 INFO  L113        SettingsManager]: Loading preferences was successful
[2019-10-14 23:59:54,892 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2019-10-14 23:59:54,894 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2019-10-14 23:59:54,894 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2019-10-14 23:59:54,894 INFO  L138        SettingsManager]:  * Use SBE=true
[2019-10-14 23:59:54,894 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2019-10-14 23:59:54,895 INFO  L138        SettingsManager]:  * sizeof long=4
[2019-10-14 23:59:54,895 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2019-10-14 23:59:54,895 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2019-10-14 23:59:54,895 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2019-10-14 23:59:54,895 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2019-10-14 23:59:54,895 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2019-10-14 23:59:54,896 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2019-10-14 23:59:54,896 INFO  L138        SettingsManager]:  * sizeof long double=12
[2019-10-14 23:59:54,896 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2019-10-14 23:59:54,896 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2019-10-14 23:59:54,896 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2019-10-14 23:59:54,897 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2019-10-14 23:59:54,897 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2019-10-14 23:59:54,897 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2019-10-14 23:59:54,897 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2019-10-14 23:59:54,897 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2019-10-14 23:59:54,898 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2019-10-14 23:59:54,898 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2019-10-14 23:59:54,898 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2019-10-14 23:59:54,898 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2019-10-14 23:59:54,898 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2019-10-14 23:59:54,899 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2019-10-14 23:59:54,899 INFO  L138        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: Abstract domain -> IntervalDomain
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> TAIPAN
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Abstract interpretation Mode -> USE_PREDICATES
[2019-10-14 23:59:55,176 INFO  L81    nceAwareModelManager]: Repository-Root is: /tmp
[2019-10-14 23:59:55,190 INFO  L258   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2019-10-14 23:59:55,193 INFO  L214   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2019-10-14 23:59:55,195 INFO  L271        PluginConnector]: Initializing CDTParser...
[2019-10-14 23:59:55,195 INFO  L275        PluginConnector]: CDTParser initialized
[2019-10-14 23:59:55,196 INFO  L428   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem04_label41.c
[2019-10-14 23:59:55,274 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e45fe5e2a/aec8c48507734c508e9f167e654864bc/FLAGf5d1cda62
[2019-10-14 23:59:56,039 INFO  L306              CDTParser]: Found 1 translation units.
[2019-10-14 23:59:56,042 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem04_label41.c
[2019-10-14 23:59:56,079 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e45fe5e2a/aec8c48507734c508e9f167e654864bc/FLAGf5d1cda62
[2019-10-14 23:59:56,132 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e45fe5e2a/aec8c48507734c508e9f167e654864bc
[2019-10-14 23:59:56,143 INFO  L296   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2019-10-14 23:59:56,145 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2019-10-14 23:59:56,148 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2019-10-14 23:59:56,148 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2019-10-14 23:59:56,152 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2019-10-14 23:59:56,153 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:59:56" (1/1) ...
[2019-10-14 23:59:56,157 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@338e2a78 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:59:56, skipping insertion in model container
[2019-10-14 23:59:56,157 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:59:56" (1/1) ...
[2019-10-14 23:59:56,166 INFO  L142         MainTranslator]: Starting translation in SV-COMP mode 
[2019-10-14 23:59:56,349 INFO  L173         MainTranslator]: Built tables and reachable declarations
[2019-10-14 23:59:57,866 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2019-10-14 23:59:57,877 INFO  L188         MainTranslator]: Completed pre-run
[2019-10-14 23:59:58,614 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2019-10-14 23:59:58,661 INFO  L192         MainTranslator]: Completed translation
[2019-10-14 23:59:58,662 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:59:58 WrapperNode
[2019-10-14 23:59:58,662 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2019-10-14 23:59:58,663 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2019-10-14 23:59:58,663 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2019-10-14 23:59:58,663 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2019-10-14 23:59:58,683 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:59:58" (1/1) ...
[2019-10-14 23:59:58,683 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:59:58" (1/1) ...
[2019-10-14 23:59:58,769 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:59:58" (1/1) ...
[2019-10-14 23:59:58,771 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:59:58" (1/1) ...
[2019-10-14 23:59:58,874 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:59:58" (1/1) ...
[2019-10-14 23:59:58,902 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:59:58" (1/1) ...
[2019-10-14 23:59:58,921 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:59:58" (1/1) ...
[2019-10-14 23:59:58,943 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2019-10-14 23:59:58,943 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2019-10-14 23:59:58,943 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2019-10-14 23:59:58,944 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2019-10-14 23:59:58,945 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:59:58" (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
[2019-10-14 23:59:59,006 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2019-10-14 23:59:59,007 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2019-10-14 23:59:59,007 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output
[2019-10-14 23:59:59,007 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output2
[2019-10-14 23:59:59,007 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output3
[2019-10-14 23:59:59,007 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output4
[2019-10-14 23:59:59,008 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2019-10-14 23:59:59,008 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output
[2019-10-14 23:59:59,008 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output2
[2019-10-14 23:59:59,008 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output3
[2019-10-14 23:59:59,008 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output4
[2019-10-14 23:59:59,009 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2019-10-14 23:59:59,009 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int
[2019-10-14 23:59:59,009 INFO  L130     BoogieDeclarations]: Found specification of procedure exit
[2019-10-14 23:59:59,009 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2019-10-14 23:59:59,009 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2019-10-14 23:59:59,009 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2019-10-15 00:00:03,664 INFO  L279             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2019-10-15 00:00:03,664 INFO  L284             CfgBuilder]: Removed 1 assume(true) statements.
[2019-10-15 00:00:03,670 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:00:03 BoogieIcfgContainer
[2019-10-15 00:00:03,670 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2019-10-15 00:00:03,672 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2019-10-15 00:00:03,672 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2019-10-15 00:00:03,675 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2019-10-15 00:00:03,676 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 11:59:56" (1/3) ...
[2019-10-15 00:00:03,677 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13183229 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:00:03, skipping insertion in model container
[2019-10-15 00:00:03,677 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:59:58" (2/3) ...
[2019-10-15 00:00:03,678 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13183229 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:00:03, skipping insertion in model container
[2019-10-15 00:00:03,678 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:00:03" (3/3) ...
[2019-10-15 00:00:03,685 INFO  L109   eAbstractionObserver]: Analyzing ICFG Problem04_label41.c
[2019-10-15 00:00:03,699 INFO  L152   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2019-10-15 00:00:03,710 INFO  L164   ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2019-10-15 00:00:03,721 INFO  L249      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2019-10-15 00:00:03,764 INFO  L373      AbstractCegarLoop]: Interprodecural is true
[2019-10-15 00:00:03,765 INFO  L374      AbstractCegarLoop]: Hoare is true
[2019-10-15 00:00:03,765 INFO  L375      AbstractCegarLoop]: Compute interpolants for FPandBP
[2019-10-15 00:00:03,765 INFO  L376      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2019-10-15 00:00:03,765 INFO  L377      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2019-10-15 00:00:03,765 INFO  L378      AbstractCegarLoop]: Difference is false
[2019-10-15 00:00:03,765 INFO  L379      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2019-10-15 00:00:03,766 INFO  L383      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2019-10-15 00:00:03,810 INFO  L276                IsEmpty]: Start isEmpty. Operand 906 states.
[2019-10-15 00:00:03,864 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 824
[2019-10-15 00:00:03,864 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-15 00:00:03,866 INFO  L380         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-10-15 00:00:03,868 INFO  L410      AbstractCegarLoop]: === Iteration 1 === [calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-15 00:00:03,874 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-15 00:00:03,875 INFO  L82        PathProgramCache]: Analyzing trace with hash -2114335398, now seen corresponding path program 1 times
[2019-10-15 00:00:03,884 INFO  L157   tionRefinementEngine]: Executing refinement strategy TAIPAN
[2019-10-15 00:00:03,885 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451250881]
[2019-10-15 00:00:03,885 INFO  L116   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-15 00:00:03,886 INFO  L116   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-15 00:00:03,886 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-15 00:00:04,402 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-15 00:00:06,476 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-10-15 00:00:06,477 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451250881]
[2019-10-15 00:00:06,478 INFO  L223   tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-10-15 00:00:06,479 INFO  L236   tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2019-10-15 00:00:06,479 INFO  L342   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337116830]
[2019-10-15 00:00:06,487 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 3 states
[2019-10-15 00:00:06,489 INFO  L137   tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN
[2019-10-15 00:00:06,504 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2019-10-15 00:00:06,505 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2019-10-15 00:00:06,507 INFO  L87              Difference]: Start difference. First operand 906 states. Second operand 3 states.
[2019-10-15 00:00:11,748 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-10-15 00:00:11,750 INFO  L93              Difference]: Finished difference Result 2644 states and 5099 transitions.
[2019-10-15 00:00:11,750 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2019-10-15 00:00:11,752 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 823
[2019-10-15 00:00:11,764 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-10-15 00:00:11,822 INFO  L225             Difference]: With dead ends: 2644
[2019-10-15 00:00:11,823 INFO  L226             Difference]: Without dead ends: 1676
[2019-10-15 00:00:11,842 INFO  L600         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
[2019-10-15 00:00:11,879 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 1676 states.
[2019-10-15 00:00:12,065 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 1676 to 1676.
[2019-10-15 00:00:12,067 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 1676 states.
[2019-10-15 00:00:12,082 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 1676 states to 1676 states and 2968 transitions.
[2019-10-15 00:00:12,084 INFO  L78                 Accepts]: Start accepts. Automaton has 1676 states and 2968 transitions. Word has length 823
[2019-10-15 00:00:12,088 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-10-15 00:00:12,089 INFO  L462      AbstractCegarLoop]: Abstraction has 1676 states and 2968 transitions.
[2019-10-15 00:00:12,089 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2019-10-15 00:00:12,090 INFO  L276                IsEmpty]: Start isEmpty. Operand 1676 states and 2968 transitions.
[2019-10-15 00:00:12,123 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 839
[2019-10-15 00:00:12,123 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-15 00:00:12,125 INFO  L380         BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-10-15 00:00:12,125 INFO  L410      AbstractCegarLoop]: === Iteration 2 === [calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-15 00:00:12,126 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-15 00:00:12,127 INFO  L82        PathProgramCache]: Analyzing trace with hash 112452513, now seen corresponding path program 1 times
[2019-10-15 00:00:12,127 INFO  L157   tionRefinementEngine]: Executing refinement strategy TAIPAN
[2019-10-15 00:00:12,127 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103173481]
[2019-10-15 00:00:12,128 INFO  L116   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-15 00:00:12,128 INFO  L116   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-15 00:00:12,128 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-15 00:00:12,233 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-15 00:00:12,894 INFO  L134       CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-10-15 00:00:12,895 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103173481]
[2019-10-15 00:00:12,895 INFO  L223   tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-10-15 00:00:12,895 INFO  L236   tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6
[2019-10-15 00:00:12,896 INFO  L342   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500773571]
[2019-10-15 00:00:12,899 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 6 states
[2019-10-15 00:00:12,899 INFO  L137   tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN
[2019-10-15 00:00:12,899 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2019-10-15 00:00:12,900 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30
[2019-10-15 00:00:12,900 INFO  L87              Difference]: Start difference. First operand 1676 states and 2968 transitions. Second operand 6 states.
[2019-10-15 00:00:19,707 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-10-15 00:00:19,708 INFO  L93              Difference]: Finished difference Result 5125 states and 9149 transitions.
[2019-10-15 00:00:19,708 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. 
[2019-10-15 00:00:19,708 INFO  L78                 Accepts]: Start accepts. Automaton has 6 states. Word has length 838
[2019-10-15 00:00:19,708 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-10-15 00:00:19,731 INFO  L225             Difference]: With dead ends: 5125
[2019-10-15 00:00:19,732 INFO  L226             Difference]: Without dead ends: 3455
[2019-10-15 00:00:19,737 INFO  L600         BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72
[2019-10-15 00:00:19,743 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 3455 states.
[2019-10-15 00:00:19,856 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 3455 to 3395.
[2019-10-15 00:00:19,857 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 3395 states.
[2019-10-15 00:00:19,868 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 3395 states to 3395 states and 5897 transitions.
[2019-10-15 00:00:19,869 INFO  L78                 Accepts]: Start accepts. Automaton has 3395 states and 5897 transitions. Word has length 838
[2019-10-15 00:00:19,869 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-10-15 00:00:19,869 INFO  L462      AbstractCegarLoop]: Abstraction has 3395 states and 5897 transitions.
[2019-10-15 00:00:19,870 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 6 states.
[2019-10-15 00:00:19,870 INFO  L276                IsEmpty]: Start isEmpty. Operand 3395 states and 5897 transitions.
[2019-10-15 00:00:19,885 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 852
[2019-10-15 00:00:19,886 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-15 00:00:19,886 INFO  L380         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, 1, 1, 1, 1, 1]
[2019-10-15 00:00:19,887 INFO  L410      AbstractCegarLoop]: === Iteration 3 === [calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-15 00:00:19,887 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-15 00:00:19,888 INFO  L82        PathProgramCache]: Analyzing trace with hash -1117102381, now seen corresponding path program 1 times
[2019-10-15 00:00:19,888 INFO  L157   tionRefinementEngine]: Executing refinement strategy TAIPAN
[2019-10-15 00:00:19,888 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406644396]
[2019-10-15 00:00:19,888 INFO  L116   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-15 00:00:19,889 INFO  L116   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-15 00:00:19,889 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-15 00:00:19,952 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-15 00:00:20,883 INFO  L134       CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-10-15 00:00:20,883 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406644396]
[2019-10-15 00:00:20,884 INFO  L223   tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-10-15 00:00:20,885 INFO  L236   tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6
[2019-10-15 00:00:20,886 INFO  L342   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903399918]
[2019-10-15 00:00:20,891 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 6 states
[2019-10-15 00:00:20,892 INFO  L137   tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN
[2019-10-15 00:00:20,892 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2019-10-15 00:00:20,892 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30
[2019-10-15 00:00:20,893 INFO  L87              Difference]: Start difference. First operand 3395 states and 5897 transitions. Second operand 6 states.
[2019-10-15 00:00:26,704 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-10-15 00:00:26,705 INFO  L93              Difference]: Finished difference Result 8634 states and 14906 transitions.
[2019-10-15 00:00:26,706 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2019-10-15 00:00:26,706 INFO  L78                 Accepts]: Start accepts. Automaton has 6 states. Word has length 851
[2019-10-15 00:00:26,706 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-10-15 00:00:26,739 INFO  L225             Difference]: With dead ends: 8634
[2019-10-15 00:00:26,739 INFO  L226             Difference]: Without dead ends: 5245
[2019-10-15 00:00:26,750 INFO  L600         BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72
[2019-10-15 00:00:26,757 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 5245 states.
[2019-10-15 00:00:26,925 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 5245 to 5216.
[2019-10-15 00:00:26,926 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 5216 states.
[2019-10-15 00:00:27,002 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5216 states to 5216 states and 7991 transitions.
[2019-10-15 00:00:27,002 INFO  L78                 Accepts]: Start accepts. Automaton has 5216 states and 7991 transitions. Word has length 851
[2019-10-15 00:00:27,003 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-10-15 00:00:27,003 INFO  L462      AbstractCegarLoop]: Abstraction has 5216 states and 7991 transitions.
[2019-10-15 00:00:27,003 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 6 states.
[2019-10-15 00:00:27,003 INFO  L276                IsEmpty]: Start isEmpty. Operand 5216 states and 7991 transitions.
[2019-10-15 00:00:27,024 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 858
[2019-10-15 00:00:27,025 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-15 00:00:27,025 INFO  L380         BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-10-15 00:00:27,026 INFO  L410      AbstractCegarLoop]: === Iteration 4 === [calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-15 00:00:27,026 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-15 00:00:27,027 INFO  L82        PathProgramCache]: Analyzing trace with hash 191005426, now seen corresponding path program 1 times
[2019-10-15 00:00:27,027 INFO  L157   tionRefinementEngine]: Executing refinement strategy TAIPAN
[2019-10-15 00:00:27,027 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910503158]
[2019-10-15 00:00:27,028 INFO  L116   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-15 00:00:27,028 INFO  L116   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-15 00:00:27,028 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-15 00:00:27,090 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-15 00:00:27,893 INFO  L134       CoverageAnalysis]: Checked inductivity of 43 backedges. 41 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-10-15 00:00:27,894 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910503158]
[2019-10-15 00:00:27,894 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289237822]
[2019-10-15 00:00:27,894 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2019-10-15 00:00:28,261 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-15 00:00:28,269 INFO  L256         TraceCheckSpWp]: Trace formula consists of 1241 conjuncts, 10 conjunts are in the unsatisfiable core
[2019-10-15 00:00:28,322 INFO  L279         TraceCheckSpWp]: Computing forward predicates...