/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/taipan/svcomp-Reach-32bit-Taipan_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem04_label30.c


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


This is Ultimate 0.1.24-6598664
[2019-11-23 23:38:58,931 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2019-11-23 23:38:58,934 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2019-11-23 23:38:58,947 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2019-11-23 23:38:58,948 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2019-11-23 23:38:58,949 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2019-11-23 23:38:58,950 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2019-11-23 23:38:58,952 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2019-11-23 23:38:58,954 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2019-11-23 23:38:58,955 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
[2019-11-23 23:38:58,956 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
[2019-11-23 23:38:58,957 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2019-11-23 23:38:58,957 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2019-11-23 23:38:58,958 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2019-11-23 23:38:58,959 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2019-11-23 23:38:58,960 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2019-11-23 23:38:58,961 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2019-11-23 23:38:58,962 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2019-11-23 23:38:58,963 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2019-11-23 23:38:58,965 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2019-11-23 23:38:58,967 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2019-11-23 23:38:58,968 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2019-11-23 23:38:58,969 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2019-11-23 23:38:58,970 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2019-11-23 23:38:58,972 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2019-11-23 23:38:58,972 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2019-11-23 23:38:58,973 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2019-11-23 23:38:58,974 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2019-11-23 23:38:58,974 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2019-11-23 23:38:58,975 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2019-11-23 23:38:58,975 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2019-11-23 23:38:58,976 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2019-11-23 23:38:58,977 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2019-11-23 23:38:58,978 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2019-11-23 23:38:58,979 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2019-11-23 23:38:58,979 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
[2019-11-23 23:38:58,979 INFO  L184        SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2019-11-23 23:38:58,980 INFO  L184        SettingsManager]: ReqParser provides no preferences, ignoring...
[2019-11-23 23:38:58,980 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
[2019-11-23 23:38:58,981 INFO  L181        SettingsManager]: Resetting Witness Parser preferences to default values
[2019-11-23 23:38:58,981 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2019-11-23 23:38:58,982 INFO  L101        SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf
[2019-11-23 23:38:58,998 INFO  L113        SettingsManager]: Loading preferences was successful
[2019-11-23 23:38:58,998 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2019-11-23 23:38:58,999 INFO  L136        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2019-11-23 23:38:58,999 INFO  L138        SettingsManager]:  * User list type=DISABLED
[2019-11-23 23:38:58,999 INFO  L136        SettingsManager]: Preferences of Abstract Interpretation differ from their defaults:
[2019-11-23 23:38:58,999 INFO  L138        SettingsManager]:  * Explicit value domain=true
[2019-11-23 23:38:58,999 INFO  L138        SettingsManager]:  * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain
[2019-11-23 23:38:59,000 INFO  L138        SettingsManager]:  * Octagon Domain=false
[2019-11-23 23:38:59,000 INFO  L138        SettingsManager]:  * Abstract domain=CompoundDomain
[2019-11-23 23:38:59,000 INFO  L138        SettingsManager]:  * Check feasibility of abstract posts with an SMT solver=true
[2019-11-23 23:38:59,000 INFO  L138        SettingsManager]:  * Use the RCFG-of-the-future interface=true
[2019-11-23 23:38:59,000 INFO  L138        SettingsManager]:  * Interval Domain=false
[2019-11-23 23:38:59,001 INFO  L136        SettingsManager]: Preferences of Sifa differ from their defaults:
[2019-11-23 23:38:59,001 INFO  L138        SettingsManager]:  * Call Summarizer=TopInputCallSummarizer
[2019-11-23 23:38:59,001 INFO  L138        SettingsManager]:  * Simplification Technique=SIMPLIFY_QUICK
[2019-11-23 23:38:59,002 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2019-11-23 23:38:59,002 INFO  L138        SettingsManager]:  * sizeof long=4
[2019-11-23 23:38:59,002 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2019-11-23 23:38:59,002 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2019-11-23 23:38:59,002 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2019-11-23 23:38:59,003 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2019-11-23 23:38:59,003 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2019-11-23 23:38:59,003 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2019-11-23 23:38:59,003 INFO  L138        SettingsManager]:  * sizeof long double=12
[2019-11-23 23:38:59,003 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2019-11-23 23:38:59,004 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2019-11-23 23:38:59,004 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2019-11-23 23:38:59,004 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2019-11-23 23:38:59,004 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2019-11-23 23:38:59,004 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2019-11-23 23:38:59,005 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2019-11-23 23:38:59,005 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2019-11-23 23:38:59,005 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2019-11-23 23:38:59,005 INFO  L138        SettingsManager]:  * Trace refinement strategy=SIFA_TAIPAN
[2019-11-23 23:38:59,005 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2019-11-23 23:38:59,006 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2019-11-23 23:38:59,006 INFO  L138        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2019-11-23 23:38:59,006 INFO  L138        SettingsManager]:  * Abstract interpretation Mode=USE_PREDICATES
[2019-11-23 23:38:59,269 INFO  L81    nceAwareModelManager]: Repository-Root is: /tmp
[2019-11-23 23:38:59,281 INFO  L258   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2019-11-23 23:38:59,286 INFO  L214   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2019-11-23 23:38:59,287 INFO  L271        PluginConnector]: Initializing CDTParser...
[2019-11-23 23:38:59,288 INFO  L275        PluginConnector]: CDTParser initialized
[2019-11-23 23:38:59,288 INFO  L428   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem04_label30.c
[2019-11-23 23:38:59,366 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/893e01cf2/66db8472d2434845b189bad7aab652a4/FLAGa9c68fe76
[2019-11-23 23:39:00,154 INFO  L306              CDTParser]: Found 1 translation units.
[2019-11-23 23:39:00,155 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem04_label30.c
[2019-11-23 23:39:00,187 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/893e01cf2/66db8472d2434845b189bad7aab652a4/FLAGa9c68fe76
[2019-11-23 23:39:00,231 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/893e01cf2/66db8472d2434845b189bad7aab652a4
[2019-11-23 23:39:00,243 INFO  L296   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2019-11-23 23:39:00,246 INFO  L131        ToolchainWalker]: Walking toolchain with 5 elements.
[2019-11-23 23:39:00,249 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2019-11-23 23:39:00,249 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2019-11-23 23:39:00,252 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2019-11-23 23:39:00,253 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 11:39:00" (1/1) ...
[2019-11-23 23:39:00,257 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f8377bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:39:00, skipping insertion in model container
[2019-11-23 23:39:00,258 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 11:39:00" (1/1) ...
[2019-11-23 23:39:00,267 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2019-11-23 23:39:00,425 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2019-11-23 23:39:01,970 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2019-11-23 23:39:01,979 INFO  L203         MainTranslator]: Completed pre-run
[2019-11-23 23:39:02,768 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2019-11-23 23:39:02,798 INFO  L208         MainTranslator]: Completed translation
[2019-11-23 23:39:02,799 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:39:02 WrapperNode
[2019-11-23 23:39:02,799 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2019-11-23 23:39:02,800 INFO  L113        PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2019-11-23 23:39:02,800 INFO  L271        PluginConnector]: Initializing Boogie Procedure Inliner...
[2019-11-23 23:39:02,800 INFO  L275        PluginConnector]: Boogie Procedure Inliner initialized
[2019-11-23 23:39:02,809 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:39:02" (1/1) ...
[2019-11-23 23:39:02,858 INFO  L185        PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:39:02" (1/1) ...
[2019-11-23 23:39:02,993 INFO  L132        PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2019-11-23 23:39:02,993 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2019-11-23 23:39:02,994 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2019-11-23 23:39:02,994 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2019-11-23 23:39:03,004 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:39:02" (1/1) ...
[2019-11-23 23:39:03,004 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:39:02" (1/1) ...
[2019-11-23 23:39:03,027 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:39:02" (1/1) ...
[2019-11-23 23:39:03,028 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:39:02" (1/1) ...
[2019-11-23 23:39:03,101 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:39:02" (1/1) ...
[2019-11-23 23:39:03,129 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:39:02" (1/1) ...
[2019-11-23 23:39:03,149 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:39:02" (1/1) ...
[2019-11-23 23:39:03,171 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2019-11-23 23:39:03,171 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2019-11-23 23:39:03,171 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2019-11-23 23:39:03,172 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2019-11-23 23:39:03,173 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:39:02" (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 23:39:03,241 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2019-11-23 23:39:03,244 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2019-11-23 23:39:09,001 INFO  L279             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2019-11-23 23:39:09,001 INFO  L284             CfgBuilder]: Removed 13 assume(true) statements.
[2019-11-23 23:39:09,002 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 11:39:09 BoogieIcfgContainer
[2019-11-23 23:39:09,003 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2019-11-23 23:39:09,004 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2019-11-23 23:39:09,004 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2019-11-23 23:39:09,007 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2019-11-23 23:39:09,008 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 11:39:00" (1/3) ...
[2019-11-23 23:39:09,008 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f81a04a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 11:39:09, skipping insertion in model container
[2019-11-23 23:39:09,009 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:39:02" (2/3) ...
[2019-11-23 23:39:09,009 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f81a04a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 11:39:09, skipping insertion in model container
[2019-11-23 23:39:09,009 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 11:39:09" (3/3) ...
[2019-11-23 23:39:09,011 INFO  L109   eAbstractionObserver]: Analyzing ICFG Problem04_label30.c
[2019-11-23 23:39:09,021 INFO  L153   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2019-11-23 23:39:09,031 INFO  L165   ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2019-11-23 23:39:09,042 INFO  L249      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2019-11-23 23:39:09,083 INFO  L373      AbstractCegarLoop]: Interprodecural is true
[2019-11-23 23:39:09,084 INFO  L374      AbstractCegarLoop]: Hoare is true
[2019-11-23 23:39:09,084 INFO  L375      AbstractCegarLoop]: Compute interpolants for FPandBP
[2019-11-23 23:39:09,084 INFO  L376      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2019-11-23 23:39:09,084 INFO  L377      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2019-11-23 23:39:09,084 INFO  L378      AbstractCegarLoop]: Difference is false
[2019-11-23 23:39:09,084 INFO  L379      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2019-11-23 23:39:09,084 INFO  L383      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2019-11-23 23:39:09,121 INFO  L276                IsEmpty]: Start isEmpty. Operand 763 states.
[2019-11-23 23:39:09,166 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 756
[2019-11-23 23:39:09,167 INFO  L402         BasicCegarLoop]: Found error trace
[2019-11-23 23:39:09,169 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]
[2019-11-23 23:39:09,169 INFO  L410      AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-11-23 23:39:09,175 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-11-23 23:39:09,176 INFO  L82        PathProgramCache]: Analyzing trace with hash -1870343174, now seen corresponding path program 1 times
[2019-11-23 23:39:09,186 INFO  L163   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2019-11-23 23:39:09,186 INFO  L348   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460107956]
[2019-11-23 23:39:09,187 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-11-23 23:39:09,598 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-23 23:39:14,106 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 23:39:14,107 INFO  L348   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460107956]
[2019-11-23 23:39:14,108 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-11-23 23:39:14,108 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2019-11-23 23:39:14,109 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279112192]
[2019-11-23 23:39:14,120 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 5 states
[2019-11-23 23:39:14,120 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2019-11-23 23:39:14,134 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2019-11-23 23:39:14,135 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20
[2019-11-23 23:39:14,137 INFO  L87              Difference]: Start difference. First operand 763 states. Second operand 5 states.
[2019-11-23 23:39:22,056 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-11-23 23:39:22,056 INFO  L93              Difference]: Finished difference Result 3049 states and 6058 transitions.
[2019-11-23 23:39:22,057 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2019-11-23 23:39:22,058 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 755
[2019-11-23 23:39:22,066 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-11-23 23:39:22,110 INFO  L225             Difference]: With dead ends: 3049
[2019-11-23 23:39:22,110 INFO  L226             Difference]: Without dead ends: 2279
[2019-11-23 23:39:22,122 INFO  L630         BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 1 SyntacticMatches, 15 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20
[2019-11-23 23:39:22,146 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 2279 states.
[2019-11-23 23:39:22,270 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 2279 to 2277.
[2019-11-23 23:39:22,271 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 2277 states.
[2019-11-23 23:39:22,280 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 2277 states to 2277 states and 3555 transitions.
[2019-11-23 23:39:22,283 INFO  L78                 Accepts]: Start accepts. Automaton has 2277 states and 3555 transitions. Word has length 755
[2019-11-23 23:39:22,286 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-11-23 23:39:22,286 INFO  L462      AbstractCegarLoop]: Abstraction has 2277 states and 3555 transitions.
[2019-11-23 23:39:22,287 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2019-11-23 23:39:22,287 INFO  L276                IsEmpty]: Start isEmpty. Operand 2277 states and 3555 transitions.
[2019-11-23 23:39:22,314 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 825
[2019-11-23 23:39:22,314 INFO  L402         BasicCegarLoop]: Found error trace
[2019-11-23 23:39:22,315 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:39:22,316 INFO  L410      AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-11-23 23:39:22,316 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-11-23 23:39:22,316 INFO  L82        PathProgramCache]: Analyzing trace with hash -2060040780, now seen corresponding path program 1 times
[2019-11-23 23:39:22,317 INFO  L163   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2019-11-23 23:39:22,317 INFO  L348   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948392746]
[2019-11-23 23:39:22,317 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-11-23 23:39:22,452 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-23 23:39:23,317 INFO  L134       CoverageAnalysis]: Checked inductivity of 82 backedges. 68 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked.
[2019-11-23 23:39:23,318 INFO  L348   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948392746]
[2019-11-23 23:39:23,318 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-11-23 23:39:23,318 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2019-11-23 23:39:23,319 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196606117]
[2019-11-23 23:39:23,321 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 4 states
[2019-11-23 23:39:23,321 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2019-11-23 23:39:23,322 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2019-11-23 23:39:23,322 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2019-11-23 23:39:23,322 INFO  L87              Difference]: Start difference. First operand 2277 states and 3555 transitions. Second operand 4 states.
[2019-11-23 23:39:29,623 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-11-23 23:39:29,623 INFO  L93              Difference]: Finished difference Result 6827 states and 11923 transitions.
[2019-11-23 23:39:29,623 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2019-11-23 23:39:29,624 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 824
[2019-11-23 23:39:29,624 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-11-23 23:39:29,652 INFO  L225             Difference]: With dead ends: 6827
[2019-11-23 23:39:29,652 INFO  L226             Difference]: Without dead ends: 5309
[2019-11-23 23:39:29,656 INFO  L630         BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2019-11-23 23:39:29,663 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 5309 states.
[2019-11-23 23:39:29,811 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 5309 to 5309.
[2019-11-23 23:39:29,812 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 5309 states.
[2019-11-23 23:39:29,826 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5309 states to 5309 states and 7854 transitions.
[2019-11-23 23:39:29,826 INFO  L78                 Accepts]: Start accepts. Automaton has 5309 states and 7854 transitions. Word has length 824
[2019-11-23 23:39:29,827 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-11-23 23:39:29,827 INFO  L462      AbstractCegarLoop]: Abstraction has 5309 states and 7854 transitions.
[2019-11-23 23:39:29,828 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2019-11-23 23:39:29,828 INFO  L276                IsEmpty]: Start isEmpty. Operand 5309 states and 7854 transitions.
[2019-11-23 23:39:29,857 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 852
[2019-11-23 23:39:29,857 INFO  L402         BasicCegarLoop]: Found error trace
[2019-11-23 23:39:29,858 INFO  L410         BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:39:29,859 INFO  L410      AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-11-23 23:39:29,860 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-11-23 23:39:29,861 INFO  L82        PathProgramCache]: Analyzing trace with hash 1236897977, now seen corresponding path program 1 times
[2019-11-23 23:39:29,862 INFO  L163   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2019-11-23 23:39:29,862 INFO  L348   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837777121]
[2019-11-23 23:39:29,864 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-11-23 23:39:29,965 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-23 23:39:30,992 INFO  L134       CoverageAnalysis]: Checked inductivity of 150 backedges. 91 proven. 5 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked.
[2019-11-23 23:39:30,993 INFO  L348   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837777121]
[2019-11-23 23:39:30,993 INFO  L348   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921218796]
[2019-11-23 23:39:30,994 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 23:39:31,393 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-23 23:39:31,397 INFO  L255         TraceCheckSpWp]: Trace formula consists of 1057 conjuncts, 3 conjunts are in the unsatisfiable core
[2019-11-23 23:39:31,441 INFO  L278         TraceCheckSpWp]: Computing forward predicates...
[2019-11-23 23:39:31,773 INFO  L134       CoverageAnalysis]: Checked inductivity of 150 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked.
[2019-11-23 23:39:31,773 INFO  L320         TraceCheckSpWp]: Computing backward predicates...
[2019-11-23 23:39:32,143 INFO  L134       CoverageAnalysis]: Checked inductivity of 150 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked.
[2019-11-23 23:39:32,143 INFO  L220   FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences.
[2019-11-23 23:39:32,144 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [5] total 6
[2019-11-23 23:39:32,144 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77514207]
[2019-11-23 23:39:32,146 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 3 states
[2019-11-23 23:39:32,146 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2019-11-23 23:39:32,147 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2019-11-23 23:39:32,147 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42
[2019-11-23 23:39:32,147 INFO  L87              Difference]: Start difference. First operand 5309 states and 7854 transitions. Second operand 3 states.
[2019-11-23 23:39:36,145 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-11-23 23:39:36,145 INFO  L93              Difference]: Finished difference Result 14407 states and 22031 transitions.
[2019-11-23 23:39:36,146 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2019-11-23 23:39:36,146 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 851
[2019-11-23 23:39:36,147 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-11-23 23:39:36,196 INFO  L225             Difference]: With dead ends: 14407
[2019-11-23 23:39:36,196 INFO  L226             Difference]: Without dead ends: 9857
[2019-11-23 23:39:36,203 INFO  L630         BasicCegarLoop]: 0 DeclaredPredicates, 1705 GetRequests, 1700 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42
[2019-11-23 23:39:36,214 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 9857 states.
[2019-11-23 23:39:36,369 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 9857 to 9857.
[2019-11-23 23:39:36,369 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 9857 states.
[2019-11-23 23:39:36,389 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 9857 states to 9857 states and 13352 transitions.
[2019-11-23 23:39:36,390 INFO  L78                 Accepts]: Start accepts. Automaton has 9857 states and 13352 transitions. Word has length 851
[2019-11-23 23:39:36,390 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-11-23 23:39:36,390 INFO  L462      AbstractCegarLoop]: Abstraction has 9857 states and 13352 transitions.
[2019-11-23 23:39:36,390 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2019-11-23 23:39:36,390 INFO  L276                IsEmpty]: Start isEmpty. Operand 9857 states and 13352 transitions.
[2019-11-23 23:39:36,425 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 875
[2019-11-23 23:39:36,425 INFO  L402         BasicCegarLoop]: Found error trace
[2019-11-23 23:39:36,427 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, 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]
[2019-11-23 23:39:36,635 WARN  L499      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2019-11-23 23:39:36,635 INFO  L410      AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-11-23 23:39:36,635 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-11-23 23:39:36,636 INFO  L82        PathProgramCache]: Analyzing trace with hash -1226261417, now seen corresponding path program 1 times
[2019-11-23 23:39:36,636 INFO  L163   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2019-11-23 23:39:36,638 INFO  L348   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461372645]
[2019-11-23 23:39:36,638 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-11-23 23:39:36,724 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-23 23:39:37,473 INFO  L134       CoverageAnalysis]: Checked inductivity of 132 backedges. 132 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-11-23 23:39:37,474 INFO  L348   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461372645]
[2019-11-23 23:39:37,474 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-11-23 23:39:37,474 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2019-11-23 23:39:37,475 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477245616]
[2019-11-23 23:39:37,476 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 4 states
[2019-11-23 23:39:37,476 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2019-11-23 23:39:37,476 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2019-11-23 23:39:37,477 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2019-11-23 23:39:37,477 INFO  L87              Difference]: Start difference. First operand 9857 states and 13352 transitions. Second operand 4 states.
[2019-11-23 23:39:44,526 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-11-23 23:39:44,526 INFO  L93              Difference]: Finished difference Result 37147 states and 51111 transitions.
[2019-11-23 23:39:44,531 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2019-11-23 23:39:44,531 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 874
[2019-11-23 23:39:44,532 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-11-23 23:39:44,611 INFO  L225             Difference]: With dead ends: 37147
[2019-11-23 23:39:44,611 INFO  L226             Difference]: Without dead ends: 28049
[2019-11-23 23:39:44,627 INFO  L630         BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 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 23:39:44,655 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 28049 states.
[2019-11-23 23:39:45,055 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 28049 to 28049.
[2019-11-23 23:39:45,056 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 28049 states.
[2019-11-23 23:39:45,094 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 28049 states to 28049 states and 35626 transitions.
[2019-11-23 23:39:45,094 INFO  L78                 Accepts]: Start accepts. Automaton has 28049 states and 35626 transitions. Word has length 874
[2019-11-23 23:39:45,095 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-11-23 23:39:45,095 INFO  L462      AbstractCegarLoop]: Abstraction has 28049 states and 35626 transitions.
[2019-11-23 23:39:45,095 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2019-11-23 23:39:45,095 INFO  L276                IsEmpty]: Start isEmpty. Operand 28049 states and 35626 transitions.
[2019-11-23 23:39:45,145 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 882
[2019-11-23 23:39:45,146 INFO  L402         BasicCegarLoop]: Found error trace
[2019-11-23 23:39:45,147 INFO  L410         BasicCegarLoop]: trace histogram [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, 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]
[2019-11-23 23:39:45,147 INFO  L410      AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-11-23 23:39:45,147 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-11-23 23:39:45,147 INFO  L82        PathProgramCache]: Analyzing trace with hash 1548226855, now seen corresponding path program 1 times
[2019-11-23 23:39:45,148 INFO  L163   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2019-11-23 23:39:45,149 INFO  L348   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626116122]
[2019-11-23 23:39:45,149 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-11-23 23:39:45,216 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-23 23:39:45,977 INFO  L134       CoverageAnalysis]: Checked inductivity of 146 backedges. 125 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked.
[2019-11-23 23:39:45,978 INFO  L348   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626116122]
[2019-11-23 23:39:45,978 INFO  L348   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288792248]
[2019-11-23 23:39:45,978 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2019-11-23 23:39:46,251 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-23 23:39:46,253 INFO  L255         TraceCheckSpWp]: Trace formula consists of 1050 conjuncts, 2 conjunts are in the unsatisfiable core
[2019-11-23 23:39:46,286 INFO  L278         TraceCheckSpWp]: Computing forward predicates...
[2019-11-23 23:39:46,841 INFO  L134       CoverageAnalysis]: Checked inductivity of 146 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked.
[2019-11-23 23:39:46,842 INFO  L320         TraceCheckSpWp]: Computing backward predicates...
[2019-11-23 23:39:47,474 INFO  L134       CoverageAnalysis]: Checked inductivity of 146 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked.
[2019-11-23 23:39:47,474 INFO  L220   FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences.
[2019-11-23 23:39:47,475 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [3] total 4
[2019-11-23 23:39:47,475 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144364191]
[2019-11-23 23:39:47,476 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 3 states
[2019-11-23 23:39:47,477 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2019-11-23 23:39:47,477 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2019-11-23 23:39:47,477 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20
[2019-11-23 23:39:47,477 INFO  L87              Difference]: Start difference. First operand 28049 states and 35626 transitions. Second operand 3 states.
[2019-11-23 23:39:51,569 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-11-23 23:39:51,570 INFO  L93              Difference]: Finished difference Result 55339 states and 70487 transitions.
[2019-11-23 23:39:51,570 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2019-11-23 23:39:51,570 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 881
[2019-11-23 23:39:51,573 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-11-23 23:39:51,625 INFO  L225             Difference]: With dead ends: 55339
[2019-11-23 23:39:51,626 INFO  L226             Difference]: Without dead ends: 28049
[2019-11-23 23:39:51,659 INFO  L630         BasicCegarLoop]: 0 DeclaredPredicates, 1764 GetRequests, 1759 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20
[2019-11-23 23:39:51,711 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 28049 states.
[2019-11-23 23:39:52,161 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 28049 to 28049.
[2019-11-23 23:39:52,162 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 28049 states.
[2019-11-23 23:39:52,211 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 28049 states to 28049 states and 33806 transitions.
[2019-11-23 23:39:52,212 INFO  L78                 Accepts]: Start accepts. Automaton has 28049 states and 33806 transitions. Word has length 881
[2019-11-23 23:39:52,214 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-11-23 23:39:52,214 INFO  L462      AbstractCegarLoop]: Abstraction has 28049 states and 33806 transitions.
[2019-11-23 23:39:52,214 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2019-11-23 23:39:52,214 INFO  L276                IsEmpty]: Start isEmpty. Operand 28049 states and 33806 transitions.
[2019-11-23 23:39:52,280 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 980
[2019-11-23 23:39:52,280 INFO  L402         BasicCegarLoop]: Found error trace
[2019-11-23 23:39:52,281 INFO  L410         BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 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, 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]
[2019-11-23 23:39:52,493 WARN  L499      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2019-11-23 23:39:52,494 INFO  L410      AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-11-23 23:39:52,494 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-11-23 23:39:52,494 INFO  L82        PathProgramCache]: Analyzing trace with hash -446917155, now seen corresponding path program 1 times
[2019-11-23 23:39:52,495 INFO  L163   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2019-11-23 23:39:52,495 INFO  L348   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731276169]
[2019-11-23 23:39:52,495 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-11-23 23:39:52,559 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-23 23:39:54,005 INFO  L134       CoverageAnalysis]: Checked inductivity of 365 backedges. 132 proven. 5 refuted. 0 times theorem prover too weak. 228 trivial. 0 not checked.
[2019-11-23 23:39:54,005 INFO  L348   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731276169]
[2019-11-23 23:39:54,006 INFO  L348   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594881805]
[2019-11-23 23:39:54,006 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2019-11-23 23:39:54,313 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-23 23:39:54,316 INFO  L255         TraceCheckSpWp]: Trace formula consists of 1216 conjuncts, 2 conjunts are in the unsatisfiable core
[2019-11-23 23:39:54,329 INFO  L278         TraceCheckSpWp]: Computing forward predicates...
[2019-11-23 23:39:54,903 INFO  L134       CoverageAnalysis]: Checked inductivity of 365 backedges. 123 proven. 0 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked.
[2019-11-23 23:39:54,904 INFO  L320         TraceCheckSpWp]: Computing backward predicates...
[2019-11-23 23:39:55,310 INFO  L134       CoverageAnalysis]: Checked inductivity of 365 backedges. 123 proven. 0 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked.
[2019-11-23 23:39:55,311 INFO  L220   FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences.
[2019-11-23 23:39:55,311 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [5] total 7
[2019-11-23 23:39:55,312 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484930452]
[2019-11-23 23:39:55,313 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 4 states
[2019-11-23 23:39:55,313 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2019-11-23 23:39:55,313 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2019-11-23 23:39:55,313 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56
[2019-11-23 23:39:55,314 INFO  L87              Difference]: Start difference. First operand 28049 states and 33806 transitions. Second operand 4 states.
[2019-11-23 23:40:00,836 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-11-23 23:40:00,836 INFO  L93              Difference]: Finished difference Result 68225 states and 81953 transitions.
[2019-11-23 23:40:00,837 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2019-11-23 23:40:00,837 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 979
[2019-11-23 23:40:00,837 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-11-23 23:40:00,892 INFO  L225             Difference]: With dead ends: 68225
[2019-11-23 23:40:00,892 INFO  L226             Difference]: Without dead ends: 40935
[2019-11-23 23:40:00,921 INFO  L630         BasicCegarLoop]: 0 DeclaredPredicates, 1961 GetRequests, 1955 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56
[2019-11-23 23:40:00,959 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 40935 states.
[2019-11-23 23:40:01,386 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 40935 to 40935.
[2019-11-23 23:40:01,386 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 40935 states.
[2019-11-23 23:40:01,434 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 40935 states to 40935 states and 46788 transitions.
[2019-11-23 23:40:01,434 INFO  L78                 Accepts]: Start accepts. Automaton has 40935 states and 46788 transitions. Word has length 979
[2019-11-23 23:40:01,434 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-11-23 23:40:01,435 INFO  L462      AbstractCegarLoop]: Abstraction has 40935 states and 46788 transitions.
[2019-11-23 23:40:01,435 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2019-11-23 23:40:01,435 INFO  L276                IsEmpty]: Start isEmpty. Operand 40935 states and 46788 transitions.
[2019-11-23 23:40:01,470 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 1050
[2019-11-23 23:40:01,471 INFO  L402         BasicCegarLoop]: Found error trace
[2019-11-23 23:40:01,472 INFO  L410         BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:40:01,673 WARN  L499      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2019-11-23 23:40:01,673 INFO  L410      AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-11-23 23:40:01,674 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-11-23 23:40:01,674 INFO  L82        PathProgramCache]: Analyzing trace with hash 567976808, now seen corresponding path program 1 times
[2019-11-23 23:40:01,675 INFO  L163   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2019-11-23 23:40:01,675 INFO  L348   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113439043]
[2019-11-23 23:40:01,675 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-11-23 23:40:01,737 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-23 23:40:02,609 INFO  L134       CoverageAnalysis]: Checked inductivity of 592 backedges. 269 proven. 0 refuted. 0 times theorem prover too weak. 323 trivial. 0 not checked.
[2019-11-23 23:40:02,609 INFO  L348   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113439043]
[2019-11-23 23:40:02,610 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-11-23 23:40:02,610 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2019-11-23 23:40:02,611 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448259144]
[2019-11-23 23:40:02,612 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 3 states
[2019-11-23 23:40:02,613 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2019-11-23 23:40:02,613 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2019-11-23 23:40:02,613 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2019-11-23 23:40:02,614 INFO  L87              Difference]: Start difference. First operand 40935 states and 46788 transitions. Second operand 3 states.
[2019-11-23 23:40:07,180 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-11-23 23:40:07,181 INFO  L93              Difference]: Finished difference Result 112189 states and 128267 transitions.
[2019-11-23 23:40:07,181 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2019-11-23 23:40:07,181 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 1049
[2019-11-23 23:40:07,181 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-11-23 23:40:07,264 INFO  L225             Difference]: With dead ends: 112189
[2019-11-23 23:40:07,264 INFO  L226             Difference]: Without dead ends: 72013
[2019-11-23 23:40:07,305 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 23:40:07,373 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 72013 states.
[2019-11-23 23:40:07,905 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 72013 to 66707.
[2019-11-23 23:40:07,906 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 66707 states.
[2019-11-23 23:40:07,985 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 66707 states to 66707 states and 75600 transitions.
[2019-11-23 23:40:07,985 INFO  L78                 Accepts]: Start accepts. Automaton has 66707 states and 75600 transitions. Word has length 1049
[2019-11-23 23:40:07,985 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-11-23 23:40:07,986 INFO  L462      AbstractCegarLoop]: Abstraction has 66707 states and 75600 transitions.
[2019-11-23 23:40:07,986 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2019-11-23 23:40:07,986 INFO  L276                IsEmpty]: Start isEmpty. Operand 66707 states and 75600 transitions.
[2019-11-23 23:40:08,026 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 1099
[2019-11-23 23:40:08,026 INFO  L402         BasicCegarLoop]: Found error trace
[2019-11-23 23:40:08,027 INFO  L410         BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:40:08,028 INFO  L410      AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-11-23 23:40:08,028 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-11-23 23:40:08,028 INFO  L82        PathProgramCache]: Analyzing trace with hash 1251306159, now seen corresponding path program 1 times
[2019-11-23 23:40:08,029 INFO  L163   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2019-11-23 23:40:08,029 INFO  L348   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641761782]
[2019-11-23 23:40:08,029 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-11-23 23:40:08,115 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-23 23:40:10,533 INFO  L134       CoverageAnalysis]: Checked inductivity of 612 backedges. 384 proven. 0 refuted. 0 times theorem prover too weak. 228 trivial. 0 not checked.
[2019-11-23 23:40:10,533 INFO  L348   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641761782]
[2019-11-23 23:40:10,534 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-11-23 23:40:10,534 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2019-11-23 23:40:10,534 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135617748]
[2019-11-23 23:40:10,535 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 5 states
[2019-11-23 23:40:10,535 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2019-11-23 23:40:10,536 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2019-11-23 23:40:10,536 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20
[2019-11-23 23:40:10,536 INFO  L87              Difference]: Start difference. First operand 66707 states and 75600 transitions. Second operand 5 states.