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_label50.c


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


This is Ultimate 0.1.24-f4eb214f-m
[2019-10-13 21:42:52,174 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2019-10-13 21:42:52,177 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2019-10-13 21:42:52,189 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2019-10-13 21:42:52,189 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2019-10-13 21:42:52,190 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2019-10-13 21:42:52,191 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2019-10-13 21:42:52,193 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2019-10-13 21:42:52,195 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2019-10-13 21:42:52,196 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
[2019-10-13 21:42:52,197 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
[2019-10-13 21:42:52,198 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2019-10-13 21:42:52,198 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2019-10-13 21:42:52,199 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2019-10-13 21:42:52,200 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2019-10-13 21:42:52,201 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2019-10-13 21:42:52,202 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2019-10-13 21:42:52,202 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2019-10-13 21:42:52,204 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2019-10-13 21:42:52,206 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2019-10-13 21:42:52,207 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2019-10-13 21:42:52,208 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2019-10-13 21:42:52,209 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2019-10-13 21:42:52,210 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2019-10-13 21:42:52,212 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2019-10-13 21:42:52,212 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2019-10-13 21:42:52,213 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2019-10-13 21:42:52,213 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2019-10-13 21:42:52,214 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2019-10-13 21:42:52,215 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2019-10-13 21:42:52,215 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2019-10-13 21:42:52,215 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2019-10-13 21:42:52,216 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2019-10-13 21:42:52,217 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2019-10-13 21:42:52,218 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2019-10-13 21:42:52,218 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
[2019-10-13 21:42:52,219 INFO  L184        SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2019-10-13 21:42:52,219 INFO  L184        SettingsManager]: ReqParser provides no preferences, ignoring...
[2019-10-13 21:42:52,219 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
[2019-10-13 21:42:52,220 INFO  L181        SettingsManager]: Resetting Witness Parser preferences to default values
[2019-10-13 21:42:52,221 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2019-10-13 21:42:52,221 INFO  L101        SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf
[2019-10-13 21:42:52,242 INFO  L113        SettingsManager]: Loading preferences was successful
[2019-10-13 21:42:52,242 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2019-10-13 21:42:52,244 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2019-10-13 21:42:52,244 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2019-10-13 21:42:52,244 INFO  L138        SettingsManager]:  * Use SBE=true
[2019-10-13 21:42:52,244 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2019-10-13 21:42:52,245 INFO  L138        SettingsManager]:  * sizeof long=4
[2019-10-13 21:42:52,245 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2019-10-13 21:42:52,245 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2019-10-13 21:42:52,245 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2019-10-13 21:42:52,246 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2019-10-13 21:42:52,247 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2019-10-13 21:42:52,247 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2019-10-13 21:42:52,247 INFO  L138        SettingsManager]:  * sizeof long double=12
[2019-10-13 21:42:52,247 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2019-10-13 21:42:52,248 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2019-10-13 21:42:52,248 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2019-10-13 21:42:52,248 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2019-10-13 21:42:52,248 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2019-10-13 21:42:52,248 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2019-10-13 21:42:52,249 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2019-10-13 21:42:52,249 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2019-10-13 21:42:52,249 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2019-10-13 21:42:52,249 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2019-10-13 21:42:52,250 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2019-10-13 21:42:52,250 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2019-10-13 21:42:52,250 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2019-10-13 21:42:52,250 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2019-10-13 21:42:52,250 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
[2019-10-13 21:42:52,533 INFO  L81    nceAwareModelManager]: Repository-Root is: /tmp
[2019-10-13 21:42:52,546 INFO  L258   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2019-10-13 21:42:52,549 INFO  L214   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2019-10-13 21:42:52,551 INFO  L271        PluginConnector]: Initializing CDTParser...
[2019-10-13 21:42:52,551 INFO  L275        PluginConnector]: CDTParser initialized
[2019-10-13 21:42:52,552 INFO  L428   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem04_label50.c
[2019-10-13 21:42:52,624 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2c02ca21f/906a493046874799b916ae75fdb379ef/FLAG74df128ad
[2019-10-13 21:42:53,357 INFO  L306              CDTParser]: Found 1 translation units.
[2019-10-13 21:42:53,358 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem04_label50.c
[2019-10-13 21:42:53,383 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2c02ca21f/906a493046874799b916ae75fdb379ef/FLAG74df128ad
[2019-10-13 21:42:53,505 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2c02ca21f/906a493046874799b916ae75fdb379ef
[2019-10-13 21:42:53,516 INFO  L296   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2019-10-13 21:42:53,517 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2019-10-13 21:42:53,521 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2019-10-13 21:42:53,522 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2019-10-13 21:42:53,525 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2019-10-13 21:42:53,526 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:42:53" (1/1) ...
[2019-10-13 21:42:53,529 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@35b66671 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:42:53, skipping insertion in model container
[2019-10-13 21:42:53,529 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:42:53" (1/1) ...
[2019-10-13 21:42:53,538 INFO  L142         MainTranslator]: Starting translation in SV-COMP mode 
[2019-10-13 21:42:53,700 INFO  L173         MainTranslator]: Built tables and reachable declarations
[2019-10-13 21:42:55,088 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2019-10-13 21:42:55,104 INFO  L188         MainTranslator]: Completed pre-run
[2019-10-13 21:42:55,813 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2019-10-13 21:42:55,847 INFO  L192         MainTranslator]: Completed translation
[2019-10-13 21:42:55,848 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:42:55 WrapperNode
[2019-10-13 21:42:55,849 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2019-10-13 21:42:55,850 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2019-10-13 21:42:55,850 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2019-10-13 21:42:55,850 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2019-10-13 21:42:55,863 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:42:55" (1/1) ...
[2019-10-13 21:42:55,864 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:42:55" (1/1) ...
[2019-10-13 21:42:55,913 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:42:55" (1/1) ...
[2019-10-13 21:42:55,915 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:42:55" (1/1) ...
[2019-10-13 21:42:56,011 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:42:55" (1/1) ...
[2019-10-13 21:42:56,046 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:42:55" (1/1) ...
[2019-10-13 21:42:56,070 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:42:55" (1/1) ...
[2019-10-13 21:42:56,095 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2019-10-13 21:42:56,096 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2019-10-13 21:42:56,096 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2019-10-13 21:42:56,096 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2019-10-13 21:42:56,097 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:42:55" (1/1) ...
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2019-10-13 21:42:56,170 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2019-10-13 21:42:56,170 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2019-10-13 21:42:56,170 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output
[2019-10-13 21:42:56,170 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output2
[2019-10-13 21:42:56,171 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output3
[2019-10-13 21:42:56,171 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output4
[2019-10-13 21:42:56,172 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2019-10-13 21:42:56,173 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output
[2019-10-13 21:42:56,173 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output2
[2019-10-13 21:42:56,173 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output3
[2019-10-13 21:42:56,173 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output4
[2019-10-13 21:42:56,174 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2019-10-13 21:42:56,174 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int
[2019-10-13 21:42:56,174 INFO  L130     BoogieDeclarations]: Found specification of procedure exit
[2019-10-13 21:42:56,175 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2019-10-13 21:42:56,175 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2019-10-13 21:42:56,176 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2019-10-13 21:43:01,225 INFO  L279             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2019-10-13 21:43:01,225 INFO  L284             CfgBuilder]: Removed 1 assume(true) statements.
[2019-10-13 21:43:01,227 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:43:01 BoogieIcfgContainer
[2019-10-13 21:43:01,228 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2019-10-13 21:43:01,229 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2019-10-13 21:43:01,229 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2019-10-13 21:43:01,232 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2019-10-13 21:43:01,232 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 09:42:53" (1/3) ...
[2019-10-13 21:43:01,233 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27f3df40 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:43:01, skipping insertion in model container
[2019-10-13 21:43:01,233 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:42:55" (2/3) ...
[2019-10-13 21:43:01,233 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27f3df40 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:43:01, skipping insertion in model container
[2019-10-13 21:43:01,233 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:43:01" (3/3) ...
[2019-10-13 21:43:01,235 INFO  L109   eAbstractionObserver]: Analyzing ICFG Problem04_label50.c
[2019-10-13 21:43:01,245 INFO  L152   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2019-10-13 21:43:01,253 INFO  L164   ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2019-10-13 21:43:01,264 INFO  L249      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2019-10-13 21:43:01,295 INFO  L373      AbstractCegarLoop]: Interprodecural is true
[2019-10-13 21:43:01,296 INFO  L374      AbstractCegarLoop]: Hoare is true
[2019-10-13 21:43:01,296 INFO  L375      AbstractCegarLoop]: Compute interpolants for FPandBP
[2019-10-13 21:43:01,296 INFO  L376      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2019-10-13 21:43:01,296 INFO  L377      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2019-10-13 21:43:01,296 INFO  L378      AbstractCegarLoop]: Difference is false
[2019-10-13 21:43:01,296 INFO  L379      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2019-10-13 21:43:01,297 INFO  L383      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2019-10-13 21:43:01,328 INFO  L276                IsEmpty]: Start isEmpty. Operand 785 states.
[2019-10-13 21:43:01,370 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 768
[2019-10-13 21:43:01,371 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-13 21:43:01,373 INFO  L380         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-10-13 21:43:01,375 INFO  L410      AbstractCegarLoop]: === Iteration 1 === [calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-13 21:43:01,380 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-13 21:43:01,381 INFO  L82        PathProgramCache]: Analyzing trace with hash -1899125863, now seen corresponding path program 1 times
[2019-10-13 21:43:01,390 INFO  L157   tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2019-10-13 21:43:01,391 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004135566]
[2019-10-13 21:43:01,391 INFO  L116   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 21:43:01,392 INFO  L116   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 21:43:01,392 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-13 21:43:01,836 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 21:43:03,240 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-10-13 21:43:03,240 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004135566]
[2019-10-13 21:43:03,241 INFO  L223   tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-10-13 21:43:03,241 INFO  L236   tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2019-10-13 21:43:03,241 INFO  L342   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895606654]
[2019-10-13 21:43:03,247 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 3 states
[2019-10-13 21:43:03,248 INFO  L137   tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2019-10-13 21:43:03,261 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2019-10-13 21:43:03,262 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2019-10-13 21:43:03,264 INFO  L87              Difference]: Start difference. First operand 785 states. Second operand 3 states.
[2019-10-13 21:43:07,455 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-10-13 21:43:07,455 INFO  L93              Difference]: Finished difference Result 2343 states and 4615 transitions.
[2019-10-13 21:43:07,455 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2019-10-13 21:43:07,456 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 767
[2019-10-13 21:43:07,461 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-10-13 21:43:07,499 INFO  L225             Difference]: With dead ends: 2343
[2019-10-13 21:43:07,499 INFO  L226             Difference]: Without dead ends: 1555
[2019-10-13 21:43:07,509 INFO  L600         BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 5 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2019-10-13 21:43:07,529 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 1555 states.
[2019-10-13 21:43:07,665 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 1555 to 1555.
[2019-10-13 21:43:07,667 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 1555 states.
[2019-10-13 21:43:07,675 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 1555 states to 1555 states and 3003 transitions.
[2019-10-13 21:43:07,677 INFO  L78                 Accepts]: Start accepts. Automaton has 1555 states and 3003 transitions. Word has length 767
[2019-10-13 21:43:07,679 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-10-13 21:43:07,679 INFO  L462      AbstractCegarLoop]: Abstraction has 1555 states and 3003 transitions.
[2019-10-13 21:43:07,679 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2019-10-13 21:43:07,679 INFO  L276                IsEmpty]: Start isEmpty. Operand 1555 states and 3003 transitions.
[2019-10-13 21:43:07,703 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 776
[2019-10-13 21:43:07,703 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-13 21:43:07,704 INFO  L380         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]
[2019-10-13 21:43:07,704 INFO  L410      AbstractCegarLoop]: === Iteration 2 === [calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-13 21:43:07,705 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-13 21:43:07,705 INFO  L82        PathProgramCache]: Analyzing trace with hash -1537896472, now seen corresponding path program 1 times
[2019-10-13 21:43:07,705 INFO  L157   tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2019-10-13 21:43:07,706 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689678853]
[2019-10-13 21:43:07,706 INFO  L116   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 21:43:07,706 INFO  L116   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 21:43:07,706 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-13 21:43:07,869 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 21:43:09,305 INFO  L134       CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-10-13 21:43:09,305 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689678853]
[2019-10-13 21:43:09,306 INFO  L223   tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-10-13 21:43:09,306 INFO  L236   tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2019-10-13 21:43:09,306 INFO  L342   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049104628]
[2019-10-13 21:43:09,309 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 4 states
[2019-10-13 21:43:09,309 INFO  L137   tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2019-10-13 21:43:09,309 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2019-10-13 21:43:09,310 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2019-10-13 21:43:09,324 INFO  L87              Difference]: Start difference. First operand 1555 states and 3003 transitions. Second operand 4 states.
[2019-10-13 21:43:15,783 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-10-13 21:43:15,784 INFO  L93              Difference]: Finished difference Result 6201 states and 12123 transitions.
[2019-10-13 21:43:15,784 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2019-10-13 21:43:15,784 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 775
[2019-10-13 21:43:15,786 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-10-13 21:43:15,812 INFO  L225             Difference]: With dead ends: 6201
[2019-10-13 21:43:15,812 INFO  L226             Difference]: Without dead ends: 4651
[2019-10-13 21:43:15,818 INFO  L600         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
[2019-10-13 21:43:15,823 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 4651 states.
[2019-10-13 21:43:15,936 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 4651 to 4651.
[2019-10-13 21:43:15,936 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 4651 states.
[2019-10-13 21:43:15,951 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 4651 states to 4651 states and 7921 transitions.
[2019-10-13 21:43:15,952 INFO  L78                 Accepts]: Start accepts. Automaton has 4651 states and 7921 transitions. Word has length 775
[2019-10-13 21:43:15,954 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-10-13 21:43:15,954 INFO  L462      AbstractCegarLoop]: Abstraction has 4651 states and 7921 transitions.
[2019-10-13 21:43:15,954 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2019-10-13 21:43:15,954 INFO  L276                IsEmpty]: Start isEmpty. Operand 4651 states and 7921 transitions.
[2019-10-13 21:43:15,984 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 787
[2019-10-13 21:43:15,984 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-13 21:43:15,985 INFO  L380         BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-10-13 21:43:15,985 INFO  L410      AbstractCegarLoop]: === Iteration 3 === [calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-13 21:43:15,985 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-13 21:43:15,986 INFO  L82        PathProgramCache]: Analyzing trace with hash -1772112930, now seen corresponding path program 1 times
[2019-10-13 21:43:15,986 INFO  L157   tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2019-10-13 21:43:15,986 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5639448]
[2019-10-13 21:43:15,987 INFO  L116   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 21:43:15,987 INFO  L116   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 21:43:15,987 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-13 21:43:16,116 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 21:43:17,433 INFO  L134       CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked.
[2019-10-13 21:43:17,434 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5639448]
[2019-10-13 21:43:17,434 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368882866]
[2019-10-13 21:43:17,434 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2019-10-13 21:43:17,705 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 21:43:17,709 INFO  L256         TraceCheckSpWp]: Trace formula consists of 1169 conjuncts, 10 conjunts are in the unsatisfiable core
[2019-10-13 21:43:17,738 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
[2019-10-13 21:43:18,472 INFO  L134       CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-10-13 21:43:18,472 INFO  L321         TraceCheckSpWp]: Computing backward predicates...
[2019-10-13 21:43:19,037 INFO  L134       CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-10-13 21:43:19,037 INFO  L223   tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences.
[2019-10-13 21:43:19,038 INFO  L236   tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4] total 6
[2019-10-13 21:43:19,038 INFO  L342   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362247862]
[2019-10-13 21:43:19,041 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 4 states
[2019-10-13 21:43:19,041 INFO  L137   tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2019-10-13 21:43:19,041 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2019-10-13 21:43:19,041 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30
[2019-10-13 21:43:19,042 INFO  L87              Difference]: Start difference. First operand 4651 states and 7921 transitions. Second operand 4 states.
[2019-10-13 21:43:25,241 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-10-13 21:43:25,241 INFO  L93              Difference]: Finished difference Result 18585 states and 32570 transitions.
[2019-10-13 21:43:25,241 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2019-10-13 21:43:25,242 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 786
[2019-10-13 21:43:25,243 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-10-13 21:43:25,327 INFO  L225             Difference]: With dead ends: 18585
[2019-10-13 21:43:25,327 INFO  L226             Difference]: Without dead ends: 13939
[2019-10-13 21:43:25,346 INFO  L600         BasicCegarLoop]: 0 DeclaredPredicates, 1582 GetRequests, 1571 SyntacticMatches, 7 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30
[2019-10-13 21:43:25,363 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 13939 states.
[2019-10-13 21:43:25,744 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 13939 to 13939.
[2019-10-13 21:43:25,745 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 13939 states.
[2019-10-13 21:43:25,791 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13939 states to 13939 states and 21466 transitions.
[2019-10-13 21:43:25,791 INFO  L78                 Accepts]: Start accepts. Automaton has 13939 states and 21466 transitions. Word has length 786
[2019-10-13 21:43:25,794 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-10-13 21:43:25,794 INFO  L462      AbstractCegarLoop]: Abstraction has 13939 states and 21466 transitions.
[2019-10-13 21:43:25,794 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2019-10-13 21:43:25,795 INFO  L276                IsEmpty]: Start isEmpty. Operand 13939 states and 21466 transitions.
[2019-10-13 21:43:25,865 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 982
[2019-10-13 21:43:25,866 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-13 21:43:25,867 INFO  L380         BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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]
[2019-10-13 21:43:26,071 WARN  L499      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2019-10-13 21:43:26,072 INFO  L410      AbstractCegarLoop]: === Iteration 4 === [calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-13 21:43:26,073 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-13 21:43:26,073 INFO  L82        PathProgramCache]: Analyzing trace with hash -588059113, now seen corresponding path program 1 times
[2019-10-13 21:43:26,074 INFO  L157   tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2019-10-13 21:43:26,074 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441951676]
[2019-10-13 21:43:26,075 INFO  L116   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 21:43:26,075 INFO  L116   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 21:43:26,075 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-13 21:43:26,352 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 21:43:27,310 INFO  L134       CoverageAnalysis]: Checked inductivity of 339 backedges. 223 proven. 28 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked.
[2019-10-13 21:43:27,312 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441951676]
[2019-10-13 21:43:27,312 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295541878]
[2019-10-13 21:43:27,313 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2019-10-13 21:43:27,630 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 21:43:27,633 INFO  L256         TraceCheckSpWp]: Trace formula consists of 1538 conjuncts, 4 conjunts are in the unsatisfiable core
[2019-10-13 21:43:27,652 INFO  L279         TraceCheckSpWp]: Computing forward predicates...