/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/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem04_label25.c


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


This is Ultimate 0.1.24-6598664
[2019-11-23 20:59:06,862 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2019-11-23 20:59:06,865 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2019-11-23 20:59:06,879 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2019-11-23 20:59:06,880 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2019-11-23 20:59:06,881 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
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[2019-11-23 20:59:06,901 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2019-11-23 20:59:06,904 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2019-11-23 20:59:06,906 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2019-11-23 20:59:06,908 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2019-11-23 20:59:06,912 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2019-11-23 20:59:06,915 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2019-11-23 20:59:06,918 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2019-11-23 20:59:06,919 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2019-11-23 20:59:06,923 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
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[2019-11-23 20:59:06,923 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
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[2019-11-23 20:59:06,936 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
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[2019-11-23 20:59:06,940 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2019-11-23 20:59:06,941 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
[2019-11-23 20:59:06,960 INFO  L113        SettingsManager]: Loading preferences was successful
[2019-11-23 20:59:06,961 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2019-11-23 20:59:06,963 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2019-11-23 20:59:06,963 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2019-11-23 20:59:06,963 INFO  L138        SettingsManager]:  * Use SBE=true
[2019-11-23 20:59:06,964 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2019-11-23 20:59:06,964 INFO  L138        SettingsManager]:  * sizeof long=4
[2019-11-23 20:59:06,964 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2019-11-23 20:59:06,964 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2019-11-23 20:59:06,965 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2019-11-23 20:59:06,966 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2019-11-23 20:59:06,966 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2019-11-23 20:59:06,966 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2019-11-23 20:59:06,967 INFO  L138        SettingsManager]:  * Adapt memory model on pointer casts if necessary=true
[2019-11-23 20:59:06,967 INFO  L138        SettingsManager]:  * sizeof long double=12
[2019-11-23 20:59:06,967 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2019-11-23 20:59:06,967 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2019-11-23 20:59:06,968 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2019-11-23 20:59:06,968 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2019-11-23 20:59:06,968 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2019-11-23 20:59:06,968 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2019-11-23 20:59:06,968 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2019-11-23 20:59:06,969 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2019-11-23 20:59:06,969 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2019-11-23 20:59:06,969 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2019-11-23 20:59:06,969 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2019-11-23 20:59:06,969 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2019-11-23 20:59:06,970 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2019-11-23 20:59:06,970 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2019-11-23 20:59:06,970 INFO  L138        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2019-11-23 20:59:07,247 INFO  L81    nceAwareModelManager]: Repository-Root is: /tmp
[2019-11-23 20:59:07,260 INFO  L258   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2019-11-23 20:59:07,263 INFO  L214   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2019-11-23 20:59:07,264 INFO  L271        PluginConnector]: Initializing CDTParser...
[2019-11-23 20:59:07,264 INFO  L275        PluginConnector]: CDTParser initialized
[2019-11-23 20:59:07,265 INFO  L428   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem04_label25.c
[2019-11-23 20:59:07,323 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7b5722667/58a16410bee2414d96e87d72e88fcc3a/FLAGadd3a6c01
[2019-11-23 20:59:08,054 INFO  L306              CDTParser]: Found 1 translation units.
[2019-11-23 20:59:08,057 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem04_label25.c
[2019-11-23 20:59:08,084 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7b5722667/58a16410bee2414d96e87d72e88fcc3a/FLAGadd3a6c01
[2019-11-23 20:59:08,144 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7b5722667/58a16410bee2414d96e87d72e88fcc3a
[2019-11-23 20:59:08,155 INFO  L296   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2019-11-23 20:59:08,157 INFO  L131        ToolchainWalker]: Walking toolchain with 5 elements.
[2019-11-23 20:59:08,158 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2019-11-23 20:59:08,159 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2019-11-23 20:59:08,162 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2019-11-23 20:59:08,164 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:59:08" (1/1) ...
[2019-11-23 20:59:08,167 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@56ba9ac4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:59:08, skipping insertion in model container
[2019-11-23 20:59:08,167 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:59:08" (1/1) ...
[2019-11-23 20:59:08,178 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2019-11-23 20:59:08,334 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2019-11-23 20:59:10,235 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2019-11-23 20:59:10,243 INFO  L203         MainTranslator]: Completed pre-run
[2019-11-23 20:59:10,897 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2019-11-23 20:59:10,939 INFO  L208         MainTranslator]: Completed translation
[2019-11-23 20:59:10,940 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:59:10 WrapperNode
[2019-11-23 20:59:10,941 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2019-11-23 20:59:10,942 INFO  L113        PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2019-11-23 20:59:10,942 INFO  L271        PluginConnector]: Initializing Boogie Procedure Inliner...
[2019-11-23 20:59:10,942 INFO  L275        PluginConnector]: Boogie Procedure Inliner initialized
[2019-11-23 20:59:10,955 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:59:10" (1/1) ...
[2019-11-23 20:59:11,025 INFO  L185        PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:59:10" (1/1) ...
[2019-11-23 20:59:11,186 INFO  L132        PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2019-11-23 20:59:11,186 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2019-11-23 20:59:11,186 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2019-11-23 20:59:11,186 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2019-11-23 20:59:11,196 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:59:10" (1/1) ...
[2019-11-23 20:59:11,197 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:59:10" (1/1) ...
[2019-11-23 20:59:11,214 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:59:10" (1/1) ...
[2019-11-23 20:59:11,215 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:59:10" (1/1) ...
[2019-11-23 20:59:11,282 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:59:10" (1/1) ...
[2019-11-23 20:59:11,310 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:59:10" (1/1) ...
[2019-11-23 20:59:11,331 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:59:10" (1/1) ...
[2019-11-23 20:59:11,353 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2019-11-23 20:59:11,354 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2019-11-23 20:59:11,354 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2019-11-23 20:59:11,354 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2019-11-23 20:59:11,355 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:59:10" (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
[2019-11-23 20:59:11,430 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2019-11-23 20:59:11,430 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2019-11-23 20:59:15,970 INFO  L279             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2019-11-23 20:59:15,970 INFO  L284             CfgBuilder]: Removed 13 assume(true) statements.
[2019-11-23 20:59:15,972 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:59:15 BoogieIcfgContainer
[2019-11-23 20:59:15,972 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2019-11-23 20:59:15,973 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2019-11-23 20:59:15,974 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2019-11-23 20:59:15,977 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2019-11-23 20:59:15,977 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 08:59:08" (1/3) ...
[2019-11-23 20:59:15,978 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@687b46c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:59:15, skipping insertion in model container
[2019-11-23 20:59:15,979 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:59:10" (2/3) ...
[2019-11-23 20:59:15,979 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@687b46c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:59:15, skipping insertion in model container
[2019-11-23 20:59:15,979 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:59:15" (3/3) ...
[2019-11-23 20:59:15,981 INFO  L109   eAbstractionObserver]: Analyzing ICFG Problem04_label25.c
[2019-11-23 20:59:15,991 INFO  L153   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2019-11-23 20:59:16,000 INFO  L165   ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2019-11-23 20:59:16,012 INFO  L249      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2019-11-23 20:59:16,047 INFO  L373      AbstractCegarLoop]: Interprodecural is true
[2019-11-23 20:59:16,048 INFO  L374      AbstractCegarLoop]: Hoare is true
[2019-11-23 20:59:16,048 INFO  L375      AbstractCegarLoop]: Compute interpolants for FPandBP
[2019-11-23 20:59:16,048 INFO  L376      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2019-11-23 20:59:16,048 INFO  L377      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2019-11-23 20:59:16,048 INFO  L378      AbstractCegarLoop]: Difference is false
[2019-11-23 20:59:16,048 INFO  L379      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2019-11-23 20:59:16,049 INFO  L383      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2019-11-23 20:59:16,082 INFO  L276                IsEmpty]: Start isEmpty. Operand 885 states.
[2019-11-23 20:59:16,118 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 798
[2019-11-23 20:59:16,118 INFO  L402         BasicCegarLoop]: Found error trace
[2019-11-23 20:59:16,120 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]
[2019-11-23 20:59:16,121 INFO  L410      AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-11-23 20:59:16,127 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-11-23 20:59:16,128 INFO  L82        PathProgramCache]: Analyzing trace with hash -985293116, now seen corresponding path program 1 times
[2019-11-23 20:59:16,135 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2019-11-23 20:59:16,135 INFO  L348   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570940866]
[2019-11-23 20:59:16,136 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-11-23 20:59:16,566 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-23 20:59:22,193 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-11-23 20:59:22,194 INFO  L348   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570940866]
[2019-11-23 20:59:22,195 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-11-23 20:59:22,195 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2019-11-23 20:59:22,196 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966479693]
[2019-11-23 20:59:22,202 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 6 states
[2019-11-23 20:59:22,203 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-11-23 20:59:22,213 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2019-11-23 20:59:22,214 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30
[2019-11-23 20:59:22,216 INFO  L87              Difference]: Start difference. First operand 885 states. Second operand 6 states.
[2019-11-23 20:59:35,152 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-11-23 20:59:35,152 INFO  L93              Difference]: Finished difference Result 4236 states and 8303 transitions.
[2019-11-23 20:59:35,153 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2019-11-23 20:59:35,154 INFO  L78                 Accepts]: Start accepts. Automaton has 6 states. Word has length 797
[2019-11-23 20:59:35,164 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-11-23 20:59:35,205 INFO  L225             Difference]: With dead ends: 4236
[2019-11-23 20:59:35,205 INFO  L226             Difference]: Without dead ends: 3278
[2019-11-23 20:59:35,212 INFO  L630         BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 1 SyntacticMatches, 15 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30
[2019-11-23 20:59:35,237 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 3278 states.
[2019-11-23 20:59:35,356 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 3278 to 3276.
[2019-11-23 20:59:35,358 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 3276 states.
[2019-11-23 20:59:35,369 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 3276 states to 3276 states and 4278 transitions.
[2019-11-23 20:59:35,372 INFO  L78                 Accepts]: Start accepts. Automaton has 3276 states and 4278 transitions. Word has length 797
[2019-11-23 20:59:35,376 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-11-23 20:59:35,376 INFO  L462      AbstractCegarLoop]: Abstraction has 3276 states and 4278 transitions.
[2019-11-23 20:59:35,377 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 6 states.
[2019-11-23 20:59:35,377 INFO  L276                IsEmpty]: Start isEmpty. Operand 3276 states and 4278 transitions.
[2019-11-23 20:59:35,402 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 813
[2019-11-23 20:59:35,402 INFO  L402         BasicCegarLoop]: Found error trace
[2019-11-23 20:59:35,403 INFO  L410         BasicCegarLoop]: trace histogram [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]
[2019-11-23 20:59:35,404 INFO  L410      AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-11-23 20:59:35,404 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-11-23 20:59:35,405 INFO  L82        PathProgramCache]: Analyzing trace with hash 772171011, now seen corresponding path program 1 times
[2019-11-23 20:59:35,405 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2019-11-23 20:59:35,405 INFO  L348   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99053351]
[2019-11-23 20:59:35,406 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-11-23 20:59:35,588 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-23 20:59:37,400 INFO  L134       CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked.
[2019-11-23 20:59:37,401 INFO  L348   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99053351]
[2019-11-23 20:59:37,401 INFO  L348   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678468270]
[2019-11-23 20:59:37,401 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
[2019-11-23 20:59:37,736 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-23 20:59:37,740 INFO  L255         TraceCheckSpWp]: Trace formula consists of 921 conjuncts, 2 conjunts are in the unsatisfiable core
[2019-11-23 20:59:37,766 INFO  L278         TraceCheckSpWp]: Computing forward predicates...
[2019-11-23 20:59:38,290 INFO  L134       CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked.
[2019-11-23 20:59:38,291 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences.
[2019-11-23 20:59:38,291 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4
[2019-11-23 20:59:38,293 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766081420]
[2019-11-23 20:59:38,295 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 3 states
[2019-11-23 20:59:38,295 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-11-23 20:59:38,295 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2019-11-23 20:59:38,296 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20
[2019-11-23 20:59:38,296 INFO  L87              Difference]: Start difference. First operand 3276 states and 4278 transitions. Second operand 3 states.
[2019-11-23 20:59:42,395 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-11-23 20:59:42,396 INFO  L93              Difference]: Finished difference Result 8186 states and 11181 transitions.
[2019-11-23 20:59:42,402 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2019-11-23 20:59:42,403 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 812
[2019-11-23 20:59:42,404 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-11-23 20:59:42,433 INFO  L225             Difference]: With dead ends: 8186
[2019-11-23 20:59:42,434 INFO  L226             Difference]: Without dead ends: 5730
[2019-11-23 20:59:42,439 INFO  L630         BasicCegarLoop]: 0 DeclaredPredicates, 815 GetRequests, 811 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20
[2019-11-23 20:59:42,446 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 5730 states.
[2019-11-23 20:59:42,542 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 5730 to 5730.
[2019-11-23 20:59:42,542 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 5730 states.
[2019-11-23 20:59:42,555 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5730 states to 5730 states and 7158 transitions.
[2019-11-23 20:59:42,555 INFO  L78                 Accepts]: Start accepts. Automaton has 5730 states and 7158 transitions. Word has length 812
[2019-11-23 20:59:42,557 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-11-23 20:59:42,557 INFO  L462      AbstractCegarLoop]: Abstraction has 5730 states and 7158 transitions.
[2019-11-23 20:59:42,557 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2019-11-23 20:59:42,557 INFO  L276                IsEmpty]: Start isEmpty. Operand 5730 states and 7158 transitions.
[2019-11-23 20:59:42,644 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 871
[2019-11-23 20:59:42,644 INFO  L402         BasicCegarLoop]: Found error trace
[2019-11-23 20:59:42,646 INFO  L410         BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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]
[2019-11-23 20:59:42,853 WARN  L499      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2019-11-23 20:59:42,854 INFO  L410      AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-11-23 20:59:42,855 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-11-23 20:59:42,857 INFO  L82        PathProgramCache]: Analyzing trace with hash -629034384, now seen corresponding path program 1 times
[2019-11-23 20:59:42,857 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2019-11-23 20:59:42,858 INFO  L348   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276511753]
[2019-11-23 20:59:42,858 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-11-23 20:59:42,939 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-23 20:59:43,823 INFO  L134       CoverageAnalysis]: Checked inductivity of 86 backedges. 72 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked.
[2019-11-23 20:59:43,823 INFO  L348   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276511753]
[2019-11-23 20:59:43,824 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-11-23 20:59:43,824 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2019-11-23 20:59:43,824 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564188723]
[2019-11-23 20:59:43,825 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 4 states
[2019-11-23 20:59:43,826 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-11-23 20:59:43,826 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2019-11-23 20:59:43,827 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2019-11-23 20:59:43,827 INFO  L87              Difference]: Start difference. First operand 5730 states and 7158 transitions. Second operand 4 states.
[2019-11-23 20:59:50,991 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-11-23 20:59:50,992 INFO  L93              Difference]: Finished difference Result 18002 states and 23638 transitions.
[2019-11-23 20:59:50,994 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2019-11-23 20:59:50,994 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 870
[2019-11-23 20:59:50,995 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-11-23 20:59:51,053 INFO  L225             Difference]: With dead ends: 18002
[2019-11-23 20:59:51,053 INFO  L226             Difference]: Without dead ends: 13092
[2019-11-23 20:59:51,062 INFO  L630         BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2019-11-23 20:59:51,076 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 13092 states.
[2019-11-23 20:59:51,285 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 13092 to 12274.
[2019-11-23 20:59:51,285 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 12274 states.
[2019-11-23 20:59:51,318 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 12274 states to 12274 states and 15298 transitions.
[2019-11-23 20:59:51,319 INFO  L78                 Accepts]: Start accepts. Automaton has 12274 states and 15298 transitions. Word has length 870
[2019-11-23 20:59:51,319 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-11-23 20:59:51,319 INFO  L462      AbstractCegarLoop]: Abstraction has 12274 states and 15298 transitions.
[2019-11-23 20:59:51,320 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2019-11-23 20:59:51,320 INFO  L276                IsEmpty]: Start isEmpty. Operand 12274 states and 15298 transitions.
[2019-11-23 20:59:51,355 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 875
[2019-11-23 20:59:51,356 INFO  L402         BasicCegarLoop]: Found error trace
[2019-11-23 20:59:51,357 INFO  L410         BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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]
[2019-11-23 20:59:51,358 INFO  L410      AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-11-23 20:59:51,358 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-11-23 20:59:51,359 INFO  L82        PathProgramCache]: Analyzing trace with hash 1612061078, now seen corresponding path program 1 times
[2019-11-23 20:59:51,359 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2019-11-23 20:59:51,360 INFO  L348   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799940011]
[2019-11-23 20:59:51,361 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-11-23 20:59:51,423 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-23 20:59:51,992 INFO  L134       CoverageAnalysis]: Checked inductivity of 97 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked.
[2019-11-23 20:59:51,993 INFO  L348   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799940011]
[2019-11-23 20:59:51,994 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-11-23 20:59:51,994 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2019-11-23 20:59:51,995 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057673792]
[2019-11-23 20:59:51,997 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 3 states
[2019-11-23 20:59:51,997 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-11-23 20:59:51,997 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2019-11-23 20:59:51,998 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2019-11-23 20:59:51,998 INFO  L87              Difference]: Start difference. First operand 12274 states and 15298 transitions. Second operand 3 states.
[2019-11-23 20:59:56,270 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-11-23 20:59:56,271 INFO  L93              Difference]: Finished difference Result 28636 states and 36929 transitions.
[2019-11-23 20:59:56,271 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2019-11-23 20:59:56,271 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 874
[2019-11-23 20:59:56,271 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-11-23 20:59:56,326 INFO  L225             Difference]: With dead ends: 28636
[2019-11-23 20:59:56,326 INFO  L226             Difference]: Without dead ends: 17182
[2019-11-23 20:59:56,339 INFO  L630         BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2019-11-23 20:59:56,358 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 17182 states.
[2019-11-23 20:59:56,552 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 17182 to 17182.
[2019-11-23 20:59:56,552 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 17182 states.
[2019-11-23 20:59:56,580 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 17182 states to 17182 states and 20710 transitions.
[2019-11-23 20:59:56,581 INFO  L78                 Accepts]: Start accepts. Automaton has 17182 states and 20710 transitions. Word has length 874
[2019-11-23 20:59:56,581 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-11-23 20:59:56,581 INFO  L462      AbstractCegarLoop]: Abstraction has 17182 states and 20710 transitions.
[2019-11-23 20:59:56,581 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2019-11-23 20:59:56,582 INFO  L276                IsEmpty]: Start isEmpty. Operand 17182 states and 20710 transitions.
[2019-11-23 20:59:56,616 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 882
[2019-11-23 20:59:56,617 INFO  L402         BasicCegarLoop]: Found error trace
[2019-11-23 20:59:56,618 INFO  L410         BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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]
[2019-11-23 20:59:56,618 INFO  L410      AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-11-23 20:59:56,618 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-11-23 20:59:56,618 INFO  L82        PathProgramCache]: Analyzing trace with hash 1428560327, now seen corresponding path program 1 times
[2019-11-23 20:59:56,619 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2019-11-23 20:59:56,619 INFO  L348   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349525384]
[2019-11-23 20:59:56,619 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-11-23 20:59:56,671 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-23 20:59:57,119 INFO  L134       CoverageAnalysis]: Checked inductivity of 118 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked.
[2019-11-23 20:59:57,120 INFO  L348   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349525384]
[2019-11-23 20:59:57,120 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-11-23 20:59:57,120 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2019-11-23 20:59:57,121 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014135961]
[2019-11-23 20:59:57,122 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 3 states
[2019-11-23 20:59:57,122 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-11-23 20:59:57,122 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2019-11-23 20:59:57,122 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2019-11-23 20:59:57,123 INFO  L87              Difference]: Start difference. First operand 17182 states and 20710 transitions. Second operand 3 states.
[2019-11-23 21:00:01,614 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-11-23 21:00:01,615 INFO  L93              Difference]: Finished difference Result 48268 states and 58805 transitions.
[2019-11-23 21:00:01,615 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2019-11-23 21:00:01,615 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 881
[2019-11-23 21:00:01,616 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-11-23 21:00:01,674 INFO  L225             Difference]: With dead ends: 48268
[2019-11-23 21:00:01,675 INFO  L226             Difference]: Without dead ends: 31906
[2019-11-23 21:00:01,698 INFO  L630         BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2019-11-23 21:00:01,738 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 31906 states.
[2019-11-23 21:00:02,051 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 31906 to 31906.
[2019-11-23 21:00:02,051 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 31906 states.
[2019-11-23 21:00:02,095 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 31906 states to 31906 states and 37901 transitions.
[2019-11-23 21:00:02,096 INFO  L78                 Accepts]: Start accepts. Automaton has 31906 states and 37901 transitions. Word has length 881
[2019-11-23 21:00:02,096 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-11-23 21:00:02,096 INFO  L462      AbstractCegarLoop]: Abstraction has 31906 states and 37901 transitions.
[2019-11-23 21:00:02,096 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2019-11-23 21:00:02,096 INFO  L276                IsEmpty]: Start isEmpty. Operand 31906 states and 37901 transitions.
[2019-11-23 21:00:02,151 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 902
[2019-11-23 21:00:02,151 INFO  L402         BasicCegarLoop]: Found error trace
[2019-11-23 21:00:02,152 INFO  L410         BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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]
[2019-11-23 21:00:02,152 INFO  L410      AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-11-23 21:00:02,153 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-11-23 21:00:02,153 INFO  L82        PathProgramCache]: Analyzing trace with hash 1139803737, now seen corresponding path program 1 times
[2019-11-23 21:00:02,153 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2019-11-23 21:00:02,154 INFO  L348   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094684880]
[2019-11-23 21:00:02,154 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-11-23 21:00:02,216 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-23 21:00:02,785 INFO  L134       CoverageAnalysis]: Checked inductivity of 142 backedges. 130 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked.
[2019-11-23 21:00:02,786 INFO  L348   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094684880]
[2019-11-23 21:00:02,786 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-11-23 21:00:02,786 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2019-11-23 21:00:02,787 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928986630]
[2019-11-23 21:00:02,787 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 4 states
[2019-11-23 21:00:02,788 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-11-23 21:00:02,788 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2019-11-23 21:00:02,788 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2019-11-23 21:00:02,788 INFO  L87              Difference]: Start difference. First operand 31906 states and 37901 transitions. Second operand 4 states.
[2019-11-23 21:00:09,853 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-11-23 21:00:09,854 INFO  L93              Difference]: Finished difference Result 77716 states and 96298 transitions.
[2019-11-23 21:00:09,856 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2019-11-23 21:00:09,856 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 901
[2019-11-23 21:00:09,856 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-11-23 21:00:09,970 INFO  L225             Difference]: With dead ends: 77716
[2019-11-23 21:00:09,970 INFO  L226             Difference]: Without dead ends: 46630
[2019-11-23 21:00:10,013 INFO  L630         BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2019-11-23 21:00:10,068 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 46630 states.
[2019-11-23 21:00:10,575 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 46630 to 46630.
[2019-11-23 21:00:10,575 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 46630 states.
[2019-11-23 21:00:12,072 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 46630 states to 46630 states and 56287 transitions.
[2019-11-23 21:00:12,073 INFO  L78                 Accepts]: Start accepts. Automaton has 46630 states and 56287 transitions. Word has length 901
[2019-11-23 21:00:12,073 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-11-23 21:00:12,073 INFO  L462      AbstractCegarLoop]: Abstraction has 46630 states and 56287 transitions.
[2019-11-23 21:00:12,073 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2019-11-23 21:00:12,074 INFO  L276                IsEmpty]: Start isEmpty. Operand 46630 states and 56287 transitions.
[2019-11-23 21:00:12,122 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 962
[2019-11-23 21:00:12,123 INFO  L402         BasicCegarLoop]: Found error trace
[2019-11-23 21:00:12,126 INFO  L410         BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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]
[2019-11-23 21:00:12,126 INFO  L410      AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-11-23 21:00:12,127 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-11-23 21:00:12,127 INFO  L82        PathProgramCache]: Analyzing trace with hash -1705333905, now seen corresponding path program 1 times
[2019-11-23 21:00:12,128 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2019-11-23 21:00:12,128 INFO  L348   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943362504]
[2019-11-23 21:00:12,129 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-11-23 21:00:12,219 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-23 21:00:13,122 INFO  L134       CoverageAnalysis]: Checked inductivity of 202 backedges. 163 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked.
[2019-11-23 21:00:13,123 INFO  L348   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943362504]
[2019-11-23 21:00:13,123 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-11-23 21:00:13,123 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2019-11-23 21:00:13,124 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004394236]
[2019-11-23 21:00:13,125 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 3 states
[2019-11-23 21:00:13,125 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-11-23 21:00:13,125 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2019-11-23 21:00:13,126 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2019-11-23 21:00:13,126 INFO  L87              Difference]: Start difference. First operand 46630 states and 56287 transitions. Second operand 3 states.
[2019-11-23 21:00:17,525 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-11-23 21:00:17,525 INFO  L93              Difference]: Finished difference Result 125978 states and 152860 transitions.
[2019-11-23 21:00:17,526 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2019-11-23 21:00:17,526 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 961
[2019-11-23 21:00:17,526 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-11-23 21:00:17,634 INFO  L225             Difference]: With dead ends: 125978
[2019-11-23 21:00:17,634 INFO  L226             Difference]: Without dead ends: 80168
[2019-11-23 21:00:17,677 INFO  L630         BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2019-11-23 21:00:17,753 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 80168 states.
[2019-11-23 21:00:18,764 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 80168 to 68716.
[2019-11-23 21:00:18,765 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 68716 states.
[2019-11-23 21:00:18,823 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 68716 states to 68716 states and 80505 transitions.
[2019-11-23 21:00:18,823 INFO  L78                 Accepts]: Start accepts. Automaton has 68716 states and 80505 transitions. Word has length 961
[2019-11-23 21:00:18,824 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-11-23 21:00:18,824 INFO  L462      AbstractCegarLoop]: Abstraction has 68716 states and 80505 transitions.
[2019-11-23 21:00:18,824 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2019-11-23 21:00:18,824 INFO  L276                IsEmpty]: Start isEmpty. Operand 68716 states and 80505 transitions.
[2019-11-23 21:00:18,889 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 1109
[2019-11-23 21:00:18,889 INFO  L402         BasicCegarLoop]: Found error trace
[2019-11-23 21:00:18,890 INFO  L410         BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 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]
[2019-11-23 21:00:18,890 INFO  L410      AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-11-23 21:00:18,890 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-11-23 21:00:18,891 INFO  L82        PathProgramCache]: Analyzing trace with hash 950536220, now seen corresponding path program 1 times
[2019-11-23 21:00:18,891 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2019-11-23 21:00:18,891 INFO  L348   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924302952]
[2019-11-23 21:00:18,891 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-11-23 21:00:18,959 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-23 21:00:19,758 INFO  L134       CoverageAnalysis]: Checked inductivity of 752 backedges. 319 proven. 0 refuted. 0 times theorem prover too weak. 433 trivial. 0 not checked.
[2019-11-23 21:00:19,759 INFO  L348   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924302952]
[2019-11-23 21:00:19,759 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-11-23 21:00:19,759 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2019-11-23 21:00:19,760 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138713284]
[2019-11-23 21:00:19,760 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 4 states
[2019-11-23 21:00:19,760 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-11-23 21:00:19,761 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2019-11-23 21:00:19,761 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2019-11-23 21:00:19,761 INFO  L87              Difference]: Start difference. First operand 68716 states and 80505 transitions. Second operand 4 states.