/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.trace.refinement.strategy SIFA_TAIPAN --sifa.abstract.domain CompoundDomain --rcfgbuilder.size.of.a.code.block LoopFreeBlock --sifa.call.summarizer TopInputCallSummarizer --sifa.fluid SizeLimitFluid --sifa.simplification.technique SIMPLIFY_QUICK -i ../../../trunk/examples/svcomp/eca-rers2012/Problem04_label49.c


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


This is Ultimate 0.1.24-fb55353
[2019-11-07 01:44:36,965 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2019-11-07 01:44:36,967 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2019-11-07 01:44:36,979 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2019-11-07 01:44:36,979 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2019-11-07 01:44:36,981 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2019-11-07 01:44:36,983 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2019-11-07 01:44:36,984 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2019-11-07 01:44:36,986 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2019-11-07 01:44:36,987 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
[2019-11-07 01:44:36,988 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
[2019-11-07 01:44:36,990 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2019-11-07 01:44:36,990 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2019-11-07 01:44:36,991 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2019-11-07 01:44:36,992 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2019-11-07 01:44:36,993 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2019-11-07 01:44:36,994 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2019-11-07 01:44:36,995 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2019-11-07 01:44:36,997 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2019-11-07 01:44:36,999 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2019-11-07 01:44:37,001 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2019-11-07 01:44:37,002 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2019-11-07 01:44:37,004 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2019-11-07 01:44:37,004 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2019-11-07 01:44:37,007 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2019-11-07 01:44:37,007 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2019-11-07 01:44:37,007 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2019-11-07 01:44:37,008 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2019-11-07 01:44:37,009 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2019-11-07 01:44:37,010 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2019-11-07 01:44:37,010 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2019-11-07 01:44:37,011 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2019-11-07 01:44:37,012 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2019-11-07 01:44:37,013 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2019-11-07 01:44:37,015 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2019-11-07 01:44:37,015 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
[2019-11-07 01:44:37,016 INFO  L184        SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2019-11-07 01:44:37,016 INFO  L184        SettingsManager]: ReqParser provides no preferences, ignoring...
[2019-11-07 01:44:37,017 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
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[2019-11-07 01:44:37,018 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2019-11-07 01:44:37,019 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
[2019-11-07 01:44:37,034 INFO  L113        SettingsManager]: Loading preferences was successful
[2019-11-07 01:44:37,035 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2019-11-07 01:44:37,036 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2019-11-07 01:44:37,036 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2019-11-07 01:44:37,036 INFO  L138        SettingsManager]:  * Use SBE=true
[2019-11-07 01:44:37,037 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2019-11-07 01:44:37,037 INFO  L138        SettingsManager]:  * sizeof long=4
[2019-11-07 01:44:37,037 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2019-11-07 01:44:37,037 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2019-11-07 01:44:37,037 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2019-11-07 01:44:37,038 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2019-11-07 01:44:37,038 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2019-11-07 01:44:37,039 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2019-11-07 01:44:37,039 INFO  L138        SettingsManager]:  * sizeof long double=12
[2019-11-07 01:44:37,039 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2019-11-07 01:44:37,039 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2019-11-07 01:44:37,039 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2019-11-07 01:44:37,040 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2019-11-07 01:44:37,040 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2019-11-07 01:44:37,040 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2019-11-07 01:44:37,040 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2019-11-07 01:44:37,040 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2019-11-07 01:44:37,042 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2019-11-07 01:44:37,042 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2019-11-07 01:44:37,042 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2019-11-07 01:44:37,042 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2019-11-07 01:44:37,043 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2019-11-07 01:44:37,043 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2019-11-07 01:44:37,043 INFO  L138        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> SIFA_TAIPAN
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> CompoundDomain
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> LoopFreeBlock
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Call Summarizer -> TopInputCallSummarizer
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Fluid -> SizeLimitFluid
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Simplification Technique -> SIMPLIFY_QUICK
[2019-11-07 01:44:37,365 INFO  L81    nceAwareModelManager]: Repository-Root is: /tmp
[2019-11-07 01:44:37,387 INFO  L258   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2019-11-07 01:44:37,391 INFO  L214   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2019-11-07 01:44:37,393 INFO  L271        PluginConnector]: Initializing CDTParser...
[2019-11-07 01:44:37,393 INFO  L275        PluginConnector]: CDTParser initialized
[2019-11-07 01:44:37,394 INFO  L428   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem04_label49.c
[2019-11-07 01:44:37,466 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f906bbf3a/3837366d41094daa8df97858d480ccc7/FLAGbc6c3d8c8
[2019-11-07 01:44:38,233 INFO  L306              CDTParser]: Found 1 translation units.
[2019-11-07 01:44:38,235 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem04_label49.c
[2019-11-07 01:44:38,280 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f906bbf3a/3837366d41094daa8df97858d480ccc7/FLAGbc6c3d8c8
[2019-11-07 01:44:38,817 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f906bbf3a/3837366d41094daa8df97858d480ccc7
[2019-11-07 01:44:38,841 INFO  L296   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2019-11-07 01:44:38,843 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2019-11-07 01:44:38,852 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2019-11-07 01:44:38,852 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2019-11-07 01:44:38,863 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2019-11-07 01:44:38,865 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:44:38" (1/1) ...
[2019-11-07 01:44:38,874 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@44932c6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:44:38, skipping insertion in model container
[2019-11-07 01:44:38,874 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:44:38" (1/1) ...
[2019-11-07 01:44:38,894 INFO  L142         MainTranslator]: Starting translation in SV-COMP mode 
[2019-11-07 01:44:39,159 INFO  L173         MainTranslator]: Built tables and reachable declarations
[2019-11-07 01:44:40,914 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2019-11-07 01:44:40,926 INFO  L188         MainTranslator]: Completed pre-run
[2019-11-07 01:44:41,582 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2019-11-07 01:44:41,615 INFO  L192         MainTranslator]: Completed translation
[2019-11-07 01:44:41,616 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:44:41 WrapperNode
[2019-11-07 01:44:41,616 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2019-11-07 01:44:41,617 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2019-11-07 01:44:41,617 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2019-11-07 01:44:41,617 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2019-11-07 01:44:41,633 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:44:41" (1/1) ...
[2019-11-07 01:44:41,634 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:44:41" (1/1) ...
[2019-11-07 01:44:41,692 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:44:41" (1/1) ...
[2019-11-07 01:44:41,694 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:44:41" (1/1) ...
[2019-11-07 01:44:41,799 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:44:41" (1/1) ...
[2019-11-07 01:44:41,837 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:44:41" (1/1) ...
[2019-11-07 01:44:41,857 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:44:41" (1/1) ...
[2019-11-07 01:44:41,881 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2019-11-07 01:44:41,882 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2019-11-07 01:44:41,882 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2019-11-07 01:44:41,882 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2019-11-07 01:44:41,883 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:44:41" (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
[2019-11-07 01:44:41,959 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2019-11-07 01:44:41,959 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2019-11-07 01:44:41,959 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output
[2019-11-07 01:44:41,960 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output2
[2019-11-07 01:44:41,960 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output3
[2019-11-07 01:44:41,960 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output4
[2019-11-07 01:44:41,960 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2019-11-07 01:44:41,960 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output
[2019-11-07 01:44:41,961 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output2
[2019-11-07 01:44:41,961 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output3
[2019-11-07 01:44:41,961 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output4
[2019-11-07 01:44:41,961 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2019-11-07 01:44:41,961 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int
[2019-11-07 01:44:41,961 INFO  L130     BoogieDeclarations]: Found specification of procedure exit
[2019-11-07 01:44:41,962 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2019-11-07 01:44:41,962 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2019-11-07 01:44:41,962 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2019-11-07 01:44:47,208 INFO  L279             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2019-11-07 01:44:47,210 INFO  L284             CfgBuilder]: Removed 1 assume(true) statements.
[2019-11-07 01:44:47,212 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:44:47 BoogieIcfgContainer
[2019-11-07 01:44:47,212 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2019-11-07 01:44:47,213 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2019-11-07 01:44:47,213 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2019-11-07 01:44:47,217 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2019-11-07 01:44:47,217 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:44:38" (1/3) ...
[2019-11-07 01:44:47,218 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@89de8aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:44:47, skipping insertion in model container
[2019-11-07 01:44:47,218 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:44:41" (2/3) ...
[2019-11-07 01:44:47,219 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@89de8aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:44:47, skipping insertion in model container
[2019-11-07 01:44:47,219 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:44:47" (3/3) ...
[2019-11-07 01:44:47,221 INFO  L109   eAbstractionObserver]: Analyzing ICFG Problem04_label49.c
[2019-11-07 01:44:47,234 INFO  L152   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2019-11-07 01:44:47,245 INFO  L164   ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2019-11-07 01:44:47,257 INFO  L249      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2019-11-07 01:44:47,291 INFO  L373      AbstractCegarLoop]: Interprodecural is true
[2019-11-07 01:44:47,291 INFO  L374      AbstractCegarLoop]: Hoare is true
[2019-11-07 01:44:47,291 INFO  L375      AbstractCegarLoop]: Compute interpolants for FPandBP
[2019-11-07 01:44:47,291 INFO  L376      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2019-11-07 01:44:47,291 INFO  L377      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2019-11-07 01:44:47,292 INFO  L378      AbstractCegarLoop]: Difference is false
[2019-11-07 01:44:47,292 INFO  L379      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2019-11-07 01:44:47,292 INFO  L383      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2019-11-07 01:44:47,326 INFO  L276                IsEmpty]: Start isEmpty. Operand 785 states.
[2019-11-07 01:44:47,367 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 768
[2019-11-07 01:44:47,368 INFO  L402         BasicCegarLoop]: Found error trace
[2019-11-07 01:44:47,370 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]
[2019-11-07 01:44:47,372 INFO  L410      AbstractCegarLoop]: === Iteration 1 === [calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-11-07 01:44:47,378 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-11-07 01:44:47,379 INFO  L82        PathProgramCache]: Analyzing trace with hash -1814543622, now seen corresponding path program 1 times
[2019-11-07 01:44:47,389 INFO  L161   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2019-11-07 01:44:47,389 INFO  L337   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364697057]
[2019-11-07 01:44:47,390 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-11-07 01:44:47,875 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-07 01:44:49,353 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-11-07 01:44:49,354 INFO  L337   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364697057]
[2019-11-07 01:44:49,355 INFO  L218   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-11-07 01:44:49,355 INFO  L231   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2019-11-07 01:44:49,357 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993106786]
[2019-11-07 01:44:49,363 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 3 states
[2019-11-07 01:44:49,364 INFO  L141   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2019-11-07 01:44:49,374 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2019-11-07 01:44:49,375 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2019-11-07 01:44:49,377 INFO  L87              Difference]: Start difference. First operand 785 states. Second operand 3 states.
[2019-11-07 01:44:53,849 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-11-07 01:44:53,850 INFO  L93              Difference]: Finished difference Result 2343 states and 4615 transitions.
[2019-11-07 01:44:53,850 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2019-11-07 01:44:53,852 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 767
[2019-11-07 01:44:53,857 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-11-07 01:44:53,897 INFO  L225             Difference]: With dead ends: 2343
[2019-11-07 01:44:53,897 INFO  L226             Difference]: Without dead ends: 1555
[2019-11-07 01:44:53,910 INFO  L630         BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 6 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2019-11-07 01:44:53,934 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 1555 states.
[2019-11-07 01:44:54,086 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 1555 to 1555.
[2019-11-07 01:44:54,087 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 1555 states.
[2019-11-07 01:44:54,099 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 1555 states to 1555 states and 2895 transitions.
[2019-11-07 01:44:54,102 INFO  L78                 Accepts]: Start accepts. Automaton has 1555 states and 2895 transitions. Word has length 767
[2019-11-07 01:44:54,105 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-11-07 01:44:54,105 INFO  L462      AbstractCegarLoop]: Abstraction has 1555 states and 2895 transitions.
[2019-11-07 01:44:54,105 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2019-11-07 01:44:54,105 INFO  L276                IsEmpty]: Start isEmpty. Operand 1555 states and 2895 transitions.
[2019-11-07 01:44:54,132 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 776
[2019-11-07 01:44:54,132 INFO  L402         BasicCegarLoop]: Found error trace
[2019-11-07 01:44:54,133 INFO  L410         BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-11-07 01:44:54,133 INFO  L410      AbstractCegarLoop]: === Iteration 2 === [calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-11-07 01:44:54,134 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-11-07 01:44:54,134 INFO  L82        PathProgramCache]: Analyzing trace with hash 1561738825, now seen corresponding path program 1 times
[2019-11-07 01:44:54,134 INFO  L161   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2019-11-07 01:44:54,135 INFO  L337   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957920488]
[2019-11-07 01:44:54,135 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-11-07 01:44:54,317 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-07 01:44:55,499 INFO  L134       CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-11-07 01:44:55,500 INFO  L337   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957920488]
[2019-11-07 01:44:55,500 INFO  L218   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-11-07 01:44:55,500 INFO  L231   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2019-11-07 01:44:55,500 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031738397]
[2019-11-07 01:44:55,503 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 4 states
[2019-11-07 01:44:55,504 INFO  L141   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2019-11-07 01:44:55,504 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2019-11-07 01:44:55,504 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2019-11-07 01:44:55,505 INFO  L87              Difference]: Start difference. First operand 1555 states and 2895 transitions. Second operand 4 states.
[2019-11-07 01:45:03,125 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-11-07 01:45:03,126 INFO  L93              Difference]: Finished difference Result 6201 states and 11691 transitions.
[2019-11-07 01:45:03,130 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2019-11-07 01:45:03,130 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 775
[2019-11-07 01:45:03,134 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-11-07 01:45:03,209 INFO  L225             Difference]: With dead ends: 6201
[2019-11-07 01:45:03,209 INFO  L226             Difference]: Without dead ends: 4651
[2019-11-07 01:45:03,224 INFO  L630         BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2019-11-07 01:45:03,237 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 4651 states.
[2019-11-07 01:45:03,446 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 4651 to 4651.
[2019-11-07 01:45:03,446 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 4651 states.
[2019-11-07 01:45:03,462 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 4651 states to 4651 states and 8227 transitions.
[2019-11-07 01:45:03,463 INFO  L78                 Accepts]: Start accepts. Automaton has 4651 states and 8227 transitions. Word has length 775
[2019-11-07 01:45:03,464 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-11-07 01:45:03,464 INFO  L462      AbstractCegarLoop]: Abstraction has 4651 states and 8227 transitions.
[2019-11-07 01:45:03,465 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2019-11-07 01:45:03,465 INFO  L276                IsEmpty]: Start isEmpty. Operand 4651 states and 8227 transitions.
[2019-11-07 01:45:03,501 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 826
[2019-11-07 01:45:03,502 INFO  L402         BasicCegarLoop]: Found error trace
[2019-11-07 01:45:03,503 INFO  L410         BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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]
[2019-11-07 01:45:03,503 INFO  L410      AbstractCegarLoop]: === Iteration 3 === [calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-11-07 01:45:03,503 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-11-07 01:45:03,504 INFO  L82        PathProgramCache]: Analyzing trace with hash -202791579, now seen corresponding path program 1 times
[2019-11-07 01:45:03,504 INFO  L161   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2019-11-07 01:45:03,504 INFO  L337   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823373503]
[2019-11-07 01:45:03,505 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-11-07 01:45:03,582 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-07 01:45:04,649 INFO  L134       CoverageAnalysis]: Checked inductivity of 55 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-11-07 01:45:04,649 INFO  L337   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823373503]
[2019-11-07 01:45:04,650 INFO  L218   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-11-07 01:45:04,650 INFO  L231   FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6
[2019-11-07 01:45:04,651 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332766111]
[2019-11-07 01:45:04,652 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 6 states
[2019-11-07 01:45:04,653 INFO  L141   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2019-11-07 01:45:04,653 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2019-11-07 01:45:04,654 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30
[2019-11-07 01:45:04,654 INFO  L87              Difference]: Start difference. First operand 4651 states and 8227 transitions. Second operand 6 states.
[2019-11-07 01:45:11,181 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-11-07 01:45:11,181 INFO  L93              Difference]: Finished difference Result 14199 states and 25817 transitions.
[2019-11-07 01:45:11,189 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2019-11-07 01:45:11,189 INFO  L78                 Accepts]: Start accepts. Automaton has 6 states. Word has length 825
[2019-11-07 01:45:11,189 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-11-07 01:45:11,260 INFO  L225             Difference]: With dead ends: 14199
[2019-11-07 01:45:11,261 INFO  L226             Difference]: Without dead ends: 9553
[2019-11-07 01:45:11,274 INFO  L630         BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72
[2019-11-07 01:45:11,292 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 9553 states.
[2019-11-07 01:45:11,603 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 9553 to 9487.
[2019-11-07 01:45:11,604 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 9487 states.
[2019-11-07 01:45:11,645 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 9487 states to 9487 states and 16236 transitions.
[2019-11-07 01:45:11,646 INFO  L78                 Accepts]: Start accepts. Automaton has 9487 states and 16236 transitions. Word has length 825
[2019-11-07 01:45:11,646 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-11-07 01:45:11,646 INFO  L462      AbstractCegarLoop]: Abstraction has 9487 states and 16236 transitions.
[2019-11-07 01:45:11,647 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 6 states.
[2019-11-07 01:45:11,647 INFO  L276                IsEmpty]: Start isEmpty. Operand 9487 states and 16236 transitions.
[2019-11-07 01:45:11,693 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 834
[2019-11-07 01:45:11,694 INFO  L402         BasicCegarLoop]: Found error trace
[2019-11-07 01:45:11,695 INFO  L410         BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-11-07 01:45:11,695 INFO  L410      AbstractCegarLoop]: === Iteration 4 === [calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-11-07 01:45:11,695 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-11-07 01:45:11,696 INFO  L82        PathProgramCache]: Analyzing trace with hash -1363013644, now seen corresponding path program 1 times
[2019-11-07 01:45:11,696 INFO  L161   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2019-11-07 01:45:11,696 INFO  L337   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703990386]
[2019-11-07 01:45:11,697 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-11-07 01:45:11,779 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-07 01:45:12,550 INFO  L134       CoverageAnalysis]: Checked inductivity of 68 backedges. 66 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-11-07 01:45:12,551 INFO  L337   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703990386]
[2019-11-07 01:45:12,551 INFO  L337   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80860188]
[2019-11-07 01:45:12,552 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
[2019-11-07 01:45:12,899 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-07 01:45:12,905 INFO  L256         TraceCheckSpWp]: Trace formula consists of 1249 conjuncts, 4 conjunts are in the unsatisfiable core
[2019-11-07 01:45:12,930 INFO  L279         TraceCheckSpWp]: Computing forward predicates...