/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_label24.c


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


This is Ultimate 0.1.24-fb55353
[2019-11-07 01:43:39,535 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2019-11-07 01:43:39,537 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2019-11-07 01:43:39,549 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2019-11-07 01:43:39,549 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2019-11-07 01:43:39,552 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2019-11-07 01:43:39,553 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2019-11-07 01:43:39,563 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2019-11-07 01:43:39,565 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2019-11-07 01:43:39,566 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
[2019-11-07 01:43:39,569 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
[2019-11-07 01:43:39,571 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2019-11-07 01:43:39,571 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2019-11-07 01:43:39,573 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2019-11-07 01:43:39,573 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2019-11-07 01:43:39,577 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2019-11-07 01:43:39,578 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2019-11-07 01:43:39,579 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2019-11-07 01:43:39,583 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2019-11-07 01:43:39,588 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2019-11-07 01:43:39,589 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2019-11-07 01:43:39,590 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2019-11-07 01:43:39,592 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2019-11-07 01:43:39,593 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2019-11-07 01:43:39,597 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2019-11-07 01:43:39,597 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2019-11-07 01:43:39,597 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2019-11-07 01:43:39,599 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2019-11-07 01:43:39,599 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2019-11-07 01:43:39,602 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2019-11-07 01:43:39,602 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2019-11-07 01:43:39,604 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2019-11-07 01:43:39,605 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2019-11-07 01:43:39,605 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2019-11-07 01:43:39,609 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2019-11-07 01:43:39,609 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
[2019-11-07 01:43:39,610 INFO  L184        SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2019-11-07 01:43:39,610 INFO  L184        SettingsManager]: ReqParser provides no preferences, ignoring...
[2019-11-07 01:43:39,610 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
[2019-11-07 01:43:39,614 INFO  L181        SettingsManager]: Resetting Witness Parser preferences to default values
[2019-11-07 01:43:39,614 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2019-11-07 01:43:39,615 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 01:43:39,649 INFO  L113        SettingsManager]: Loading preferences was successful
[2019-11-07 01:43:39,649 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2019-11-07 01:43:39,654 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2019-11-07 01:43:39,654 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2019-11-07 01:43:39,654 INFO  L138        SettingsManager]:  * Use SBE=true
[2019-11-07 01:43:39,654 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2019-11-07 01:43:39,655 INFO  L138        SettingsManager]:  * sizeof long=4
[2019-11-07 01:43:39,655 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2019-11-07 01:43:39,655 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2019-11-07 01:43:39,655 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2019-11-07 01:43:39,655 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2019-11-07 01:43:39,655 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2019-11-07 01:43:39,656 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2019-11-07 01:43:39,658 INFO  L138        SettingsManager]:  * sizeof long double=12
[2019-11-07 01:43:39,658 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2019-11-07 01:43:39,658 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2019-11-07 01:43:39,658 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2019-11-07 01:43:39,659 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2019-11-07 01:43:39,659 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2019-11-07 01:43:39,659 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2019-11-07 01:43:39,659 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2019-11-07 01:43:39,659 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2019-11-07 01:43:39,660 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2019-11-07 01:43:39,660 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2019-11-07 01:43:39,660 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2019-11-07 01:43:39,660 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2019-11-07 01:43:39,660 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2019-11-07 01:43:39,660 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2019-11-07 01:43:39,662 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 01:43:39,932 INFO  L81    nceAwareModelManager]: Repository-Root is: /tmp
[2019-11-07 01:43:39,945 INFO  L258   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2019-11-07 01:43:39,948 INFO  L214   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2019-11-07 01:43:39,950 INFO  L271        PluginConnector]: Initializing CDTParser...
[2019-11-07 01:43:39,950 INFO  L275        PluginConnector]: CDTParser initialized
[2019-11-07 01:43:39,951 INFO  L428   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem04_label24.c
[2019-11-07 01:43:40,029 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/436a1841b/91b5bf65e23b4213ace8b07d349ebfbb/FLAGf0c11a02d
[2019-11-07 01:43:40,744 INFO  L306              CDTParser]: Found 1 translation units.
[2019-11-07 01:43:40,745 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem04_label24.c
[2019-11-07 01:43:40,781 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/436a1841b/91b5bf65e23b4213ace8b07d349ebfbb/FLAGf0c11a02d
[2019-11-07 01:43:40,878 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/436a1841b/91b5bf65e23b4213ace8b07d349ebfbb
[2019-11-07 01:43:40,888 INFO  L296   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2019-11-07 01:43:40,890 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2019-11-07 01:43:40,891 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2019-11-07 01:43:40,892 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2019-11-07 01:43:40,895 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2019-11-07 01:43:40,896 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:43:40" (1/1) ...
[2019-11-07 01:43:40,899 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@113cf6bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:43:40, skipping insertion in model container
[2019-11-07 01:43:40,900 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:43:40" (1/1) ...
[2019-11-07 01:43:40,908 INFO  L142         MainTranslator]: Starting translation in SV-COMP mode 
[2019-11-07 01:43:41,083 INFO  L173         MainTranslator]: Built tables and reachable declarations
[2019-11-07 01:43:42,510 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2019-11-07 01:43:42,520 INFO  L188         MainTranslator]: Completed pre-run
[2019-11-07 01:43:43,151 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2019-11-07 01:43:43,183 INFO  L192         MainTranslator]: Completed translation
[2019-11-07 01:43:43,183 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:43:43 WrapperNode
[2019-11-07 01:43:43,184 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2019-11-07 01:43:43,185 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2019-11-07 01:43:43,185 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2019-11-07 01:43:43,185 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2019-11-07 01:43:43,200 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:43:43" (1/1) ...
[2019-11-07 01:43:43,201 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:43:43" (1/1) ...
[2019-11-07 01:43:43,265 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:43:43" (1/1) ...
[2019-11-07 01:43:43,267 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:43:43" (1/1) ...
[2019-11-07 01:43:43,391 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:43:43" (1/1) ...
[2019-11-07 01:43:43,435 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:43:43" (1/1) ...
[2019-11-07 01:43:43,460 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:43:43" (1/1) ...
[2019-11-07 01:43:43,486 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2019-11-07 01:43:43,487 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2019-11-07 01:43:43,487 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2019-11-07 01:43:43,487 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2019-11-07 01:43:43,489 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:43:43" (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 01:43:43,565 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2019-11-07 01:43:43,565 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2019-11-07 01:43:43,565 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output
[2019-11-07 01:43:43,566 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output2
[2019-11-07 01:43:43,566 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output3
[2019-11-07 01:43:43,566 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output4
[2019-11-07 01:43:43,567 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2019-11-07 01:43:43,568 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output
[2019-11-07 01:43:43,568 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output2
[2019-11-07 01:43:43,568 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output3
[2019-11-07 01:43:43,568 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output4
[2019-11-07 01:43:43,570 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2019-11-07 01:43:43,570 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int
[2019-11-07 01:43:43,571 INFO  L130     BoogieDeclarations]: Found specification of procedure exit
[2019-11-07 01:43:43,571 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2019-11-07 01:43:43,571 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2019-11-07 01:43:43,572 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2019-11-07 01:43:49,060 INFO  L279             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2019-11-07 01:43:49,061 INFO  L284             CfgBuilder]: Removed 1 assume(true) statements.
[2019-11-07 01:43:49,063 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:43:49 BoogieIcfgContainer
[2019-11-07 01:43:49,063 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2019-11-07 01:43:49,064 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2019-11-07 01:43:49,065 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2019-11-07 01:43:49,070 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2019-11-07 01:43:49,070 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:43:40" (1/3) ...
[2019-11-07 01:43:49,071 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1caf8026 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:43:49, skipping insertion in model container
[2019-11-07 01:43:49,071 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:43:43" (2/3) ...
[2019-11-07 01:43:49,072 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1caf8026 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:43:49, skipping insertion in model container
[2019-11-07 01:43:49,072 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:43:49" (3/3) ...
[2019-11-07 01:43:49,075 INFO  L109   eAbstractionObserver]: Analyzing ICFG Problem04_label24.c
[2019-11-07 01:43:49,085 INFO  L152   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2019-11-07 01:43:49,097 INFO  L164   ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2019-11-07 01:43:49,110 INFO  L249      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2019-11-07 01:43:49,169 INFO  L373      AbstractCegarLoop]: Interprodecural is true
[2019-11-07 01:43:49,169 INFO  L374      AbstractCegarLoop]: Hoare is true
[2019-11-07 01:43:49,169 INFO  L375      AbstractCegarLoop]: Compute interpolants for FPandBP
[2019-11-07 01:43:49,170 INFO  L376      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2019-11-07 01:43:49,170 INFO  L377      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2019-11-07 01:43:49,170 INFO  L378      AbstractCegarLoop]: Difference is false
[2019-11-07 01:43:49,170 INFO  L379      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2019-11-07 01:43:49,170 INFO  L383      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2019-11-07 01:43:49,218 INFO  L276                IsEmpty]: Start isEmpty. Operand 785 states.
[2019-11-07 01:43:49,287 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 768
[2019-11-07 01:43:49,287 INFO  L402         BasicCegarLoop]: Found error trace
[2019-11-07 01:43:49,290 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 01:43:49,292 INFO  L410      AbstractCegarLoop]: === Iteration 1 === [calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-11-07 01:43:49,299 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-11-07 01:43:49,300 INFO  L82        PathProgramCache]: Analyzing trace with hash -1899129191, now seen corresponding path program 1 times
[2019-11-07 01:43:49,316 INFO  L161   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2019-11-07 01:43:49,317 INFO  L337   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331997409]
[2019-11-07 01:43:49,319 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-11-07 01:43:49,844 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-07 01:43:51,389 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 01:43:51,390 INFO  L337   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331997409]
[2019-11-07 01:43:51,390 INFO  L218   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-11-07 01:43:51,391 INFO  L231   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2019-11-07 01:43:51,393 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414631655]
[2019-11-07 01:43:51,400 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 3 states
[2019-11-07 01:43:51,401 INFO  L141   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2019-11-07 01:43:51,415 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2019-11-07 01:43:51,416 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2019-11-07 01:43:51,418 INFO  L87              Difference]: Start difference. First operand 785 states. Second operand 3 states.
[2019-11-07 01:43:56,050 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-11-07 01:43:56,051 INFO  L93              Difference]: Finished difference Result 2343 states and 4615 transitions.
[2019-11-07 01:43:56,051 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2019-11-07 01:43:56,052 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 767
[2019-11-07 01:43:56,057 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-11-07 01:43:56,094 INFO  L225             Difference]: With dead ends: 2343
[2019-11-07 01:43:56,094 INFO  L226             Difference]: Without dead ends: 1555
[2019-11-07 01:43:56,104 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 01:43:56,128 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 1555 states.
[2019-11-07 01:43:56,261 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 1555 to 1555.
[2019-11-07 01:43:56,263 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 1555 states.
[2019-11-07 01:43:56,272 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 1555 states to 1555 states and 2895 transitions.
[2019-11-07 01:43:56,275 INFO  L78                 Accepts]: Start accepts. Automaton has 1555 states and 2895 transitions. Word has length 767
[2019-11-07 01:43:56,278 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-11-07 01:43:56,278 INFO  L462      AbstractCegarLoop]: Abstraction has 1555 states and 2895 transitions.
[2019-11-07 01:43:56,278 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2019-11-07 01:43:56,279 INFO  L276                IsEmpty]: Start isEmpty. Operand 1555 states and 2895 transitions.
[2019-11-07 01:43:56,304 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 776
[2019-11-07 01:43:56,304 INFO  L402         BasicCegarLoop]: Found error trace
[2019-11-07 01:43:56,305 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 01:43:56,306 INFO  L410      AbstractCegarLoop]: === Iteration 2 === [calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-11-07 01:43:56,306 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-11-07 01:43:56,307 INFO  L82        PathProgramCache]: Analyzing trace with hash -1537899800, now seen corresponding path program 1 times
[2019-11-07 01:43:56,307 INFO  L161   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2019-11-07 01:43:56,307 INFO  L337   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232545277]
[2019-11-07 01:43:56,308 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-11-07 01:43:56,477 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-07 01:43:57,860 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 01:43:57,862 INFO  L337   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232545277]
[2019-11-07 01:43:57,863 INFO  L218   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-11-07 01:43:57,863 INFO  L231   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2019-11-07 01:43:57,863 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576817267]
[2019-11-07 01:43:57,867 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 4 states
[2019-11-07 01:43:57,867 INFO  L141   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2019-11-07 01:43:57,868 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2019-11-07 01:43:57,869 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2019-11-07 01:43:57,869 INFO  L87              Difference]: Start difference. First operand 1555 states and 2895 transitions. Second operand 4 states.
[2019-11-07 01:44:04,558 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-11-07 01:44:04,558 INFO  L93              Difference]: Finished difference Result 6201 states and 11691 transitions.
[2019-11-07 01:44:04,558 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2019-11-07 01:44:04,558 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 775
[2019-11-07 01:44:04,560 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-11-07 01:44:04,588 INFO  L225             Difference]: With dead ends: 6201
[2019-11-07 01:44:04,588 INFO  L226             Difference]: Without dead ends: 4651
[2019-11-07 01:44:04,594 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 01:44:04,600 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 4651 states.
[2019-11-07 01:44:04,699 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 4651 to 4651.
[2019-11-07 01:44:04,700 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 4651 states.
[2019-11-07 01:44:04,715 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 4651 states to 4651 states and 8149 transitions.
[2019-11-07 01:44:04,716 INFO  L78                 Accepts]: Start accepts. Automaton has 4651 states and 8149 transitions. Word has length 775
[2019-11-07 01:44:04,718 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-11-07 01:44:04,718 INFO  L462      AbstractCegarLoop]: Abstraction has 4651 states and 8149 transitions.
[2019-11-07 01:44:04,718 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2019-11-07 01:44:04,718 INFO  L276                IsEmpty]: Start isEmpty. Operand 4651 states and 8149 transitions.
[2019-11-07 01:44:04,751 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 783
[2019-11-07 01:44:04,751 INFO  L402         BasicCegarLoop]: Found error trace
[2019-11-07 01:44:04,752 INFO  L410         BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-11-07 01:44:04,753 INFO  L410      AbstractCegarLoop]: === Iteration 3 === [calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-11-07 01:44:04,753 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-11-07 01:44:04,753 INFO  L82        PathProgramCache]: Analyzing trace with hash 1340665190, now seen corresponding path program 1 times
[2019-11-07 01:44:04,754 INFO  L161   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2019-11-07 01:44:04,754 INFO  L337   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908537056]
[2019-11-07 01:44:04,754 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-11-07 01:44:04,806 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-07 01:44:05,582 INFO  L134       CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-11-07 01:44:05,583 INFO  L337   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908537056]
[2019-11-07 01:44:05,583 INFO  L218   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-11-07 01:44:05,583 INFO  L231   FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6
[2019-11-07 01:44:05,585 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079738985]
[2019-11-07 01:44:05,587 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 6 states
[2019-11-07 01:44:05,587 INFO  L141   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2019-11-07 01:44:05,588 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2019-11-07 01:44:05,590 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30
[2019-11-07 01:44:05,590 INFO  L87              Difference]: Start difference. First operand 4651 states and 8149 transitions. Second operand 6 states.
[2019-11-07 01:44:11,680 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-11-07 01:44:11,680 INFO  L93              Difference]: Finished difference Result 11017 states and 19350 transitions.
[2019-11-07 01:44:11,682 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. 
[2019-11-07 01:44:11,682 INFO  L78                 Accepts]: Start accepts. Automaton has 6 states. Word has length 782
[2019-11-07 01:44:11,682 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-11-07 01:44:11,767 INFO  L225             Difference]: With dead ends: 11017
[2019-11-07 01:44:11,768 INFO  L226             Difference]: Without dead ends: 6371
[2019-11-07 01:44:11,792 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 01:44:11,808 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 6371 states.
[2019-11-07 01:44:11,998 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 6371 to 6334.
[2019-11-07 01:44:11,998 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 6334 states.
[2019-11-07 01:44:12,033 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6334 states to 6334 states and 10753 transitions.
[2019-11-07 01:44:12,033 INFO  L78                 Accepts]: Start accepts. Automaton has 6334 states and 10753 transitions. Word has length 782
[2019-11-07 01:44:12,034 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-11-07 01:44:12,034 INFO  L462      AbstractCegarLoop]: Abstraction has 6334 states and 10753 transitions.
[2019-11-07 01:44:12,034 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 6 states.
[2019-11-07 01:44:12,035 INFO  L276                IsEmpty]: Start isEmpty. Operand 6334 states and 10753 transitions.
[2019-11-07 01:44:12,063 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 802
[2019-11-07 01:44:12,063 INFO  L402         BasicCegarLoop]: Found error trace
[2019-11-07 01:44:12,064 INFO  L410         BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-11-07 01:44:12,064 INFO  L410      AbstractCegarLoop]: === Iteration 4 === [calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-11-07 01:44:12,064 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-11-07 01:44:12,065 INFO  L82        PathProgramCache]: Analyzing trace with hash -599414143, now seen corresponding path program 1 times
[2019-11-07 01:44:12,065 INFO  L161   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2019-11-07 01:44:12,066 INFO  L337   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254912272]
[2019-11-07 01:44:12,066 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-11-07 01:44:12,135 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-07 01:44:12,790 INFO  L134       CoverageAnalysis]: Checked inductivity of 43 backedges. 41 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-11-07 01:44:12,791 INFO  L337   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254912272]
[2019-11-07 01:44:12,791 INFO  L337   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667802374]
[2019-11-07 01:44:12,791 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 01:44:13,114 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-07 01:44:13,120 INFO  L256         TraceCheckSpWp]: Trace formula consists of 1232 conjuncts, 10 conjunts are in the unsatisfiable core
[2019-11-07 01:44:13,174 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
[2019-11-07 01:44:13,947 INFO  L134       CoverageAnalysis]: Checked inductivity of 43 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked.
[2019-11-07 01:44:13,948 INFO  L321         TraceCheckSpWp]: Computing backward predicates...
[2019-11-07 01:44:14,653 INFO  L134       CoverageAnalysis]: Checked inductivity of 43 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked.
[2019-11-07 01:44:14,654 INFO  L218   FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences.
[2019-11-07 01:44:14,654 INFO  L231   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 7
[2019-11-07 01:44:14,655 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010606620]
[2019-11-07 01:44:14,656 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 3 states
[2019-11-07 01:44:14,657 INFO  L141   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2019-11-07 01:44:14,657 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2019-11-07 01:44:14,657 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42
[2019-11-07 01:44:14,657 INFO  L87              Difference]: Start difference. First operand 6334 states and 10753 transitions. Second operand 3 states.