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_label44.c


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


This is Ultimate 0.1.24-f4eb214f-m
[2019-10-13 21:42:46,928 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2019-10-13 21:42:46,931 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2019-10-13 21:42:46,945 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2019-10-13 21:42:46,946 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2019-10-13 21:42:46,947 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2019-10-13 21:42:46,948 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2019-10-13 21:42:46,950 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2019-10-13 21:42:46,951 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2019-10-13 21:42:46,952 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
[2019-10-13 21:42:46,953 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
[2019-10-13 21:42:46,954 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2019-10-13 21:42:46,955 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2019-10-13 21:42:46,956 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2019-10-13 21:42:46,957 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2019-10-13 21:42:46,958 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2019-10-13 21:42:46,959 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2019-10-13 21:42:46,960 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2019-10-13 21:42:46,961 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2019-10-13 21:42:46,963 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2019-10-13 21:42:46,965 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2019-10-13 21:42:46,966 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2019-10-13 21:42:46,967 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2019-10-13 21:42:46,968 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2019-10-13 21:42:46,970 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2019-10-13 21:42:46,971 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2019-10-13 21:42:46,971 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2019-10-13 21:42:46,972 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2019-10-13 21:42:46,972 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
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[2019-10-13 21:42:46,973 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2019-10-13 21:42:46,974 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2019-10-13 21:42:46,975 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2019-10-13 21:42:46,976 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2019-10-13 21:42:46,977 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2019-10-13 21:42:46,977 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
[2019-10-13 21:42:46,977 INFO  L184        SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
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[2019-10-13 21:42:46,978 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
[2019-10-13 21:42:46,979 INFO  L181        SettingsManager]: Resetting Witness Parser preferences to default values
[2019-10-13 21:42:46,979 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2019-10-13 21:42:46,980 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 21:42:46,996 INFO  L113        SettingsManager]: Loading preferences was successful
[2019-10-13 21:42:46,997 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2019-10-13 21:42:46,998 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2019-10-13 21:42:46,999 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2019-10-13 21:42:46,999 INFO  L138        SettingsManager]:  * Use SBE=true
[2019-10-13 21:42:47,000 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2019-10-13 21:42:47,000 INFO  L138        SettingsManager]:  * sizeof long=4
[2019-10-13 21:42:47,000 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2019-10-13 21:42:47,000 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2019-10-13 21:42:47,000 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2019-10-13 21:42:47,001 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2019-10-13 21:42:47,002 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2019-10-13 21:42:47,002 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2019-10-13 21:42:47,002 INFO  L138        SettingsManager]:  * sizeof long double=12
[2019-10-13 21:42:47,002 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2019-10-13 21:42:47,003 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2019-10-13 21:42:47,003 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2019-10-13 21:42:47,003 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2019-10-13 21:42:47,003 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2019-10-13 21:42:47,004 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2019-10-13 21:42:47,004 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2019-10-13 21:42:47,004 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2019-10-13 21:42:47,004 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2019-10-13 21:42:47,005 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2019-10-13 21:42:47,005 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2019-10-13 21:42:47,005 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2019-10-13 21:42:47,005 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2019-10-13 21:42:47,006 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2019-10-13 21:42:47,006 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 21:42:47,298 INFO  L81    nceAwareModelManager]: Repository-Root is: /tmp
[2019-10-13 21:42:47,313 INFO  L258   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2019-10-13 21:42:47,316 INFO  L214   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2019-10-13 21:42:47,318 INFO  L271        PluginConnector]: Initializing CDTParser...
[2019-10-13 21:42:47,319 INFO  L275        PluginConnector]: CDTParser initialized
[2019-10-13 21:42:47,320 INFO  L428   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem04_label44.c
[2019-10-13 21:42:47,382 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d318071b5/f6a045fea07144f1ae54b52a4d3c6f98/FLAG2a605d97f
[2019-10-13 21:42:48,197 INFO  L306              CDTParser]: Found 1 translation units.
[2019-10-13 21:42:48,200 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem04_label44.c
[2019-10-13 21:42:48,241 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d318071b5/f6a045fea07144f1ae54b52a4d3c6f98/FLAG2a605d97f
[2019-10-13 21:42:48,718 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d318071b5/f6a045fea07144f1ae54b52a4d3c6f98
[2019-10-13 21:42:48,730 INFO  L296   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2019-10-13 21:42:48,732 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2019-10-13 21:42:48,733 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2019-10-13 21:42:48,734 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2019-10-13 21:42:48,738 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2019-10-13 21:42:48,739 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:42:48" (1/1) ...
[2019-10-13 21:42:48,743 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e1c27c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:42:48, skipping insertion in model container
[2019-10-13 21:42:48,744 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:42:48" (1/1) ...
[2019-10-13 21:42:48,754 INFO  L142         MainTranslator]: Starting translation in SV-COMP mode 
[2019-10-13 21:42:48,908 INFO  L173         MainTranslator]: Built tables and reachable declarations
[2019-10-13 21:42:50,383 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2019-10-13 21:42:50,395 INFO  L188         MainTranslator]: Completed pre-run
[2019-10-13 21:42:51,137 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2019-10-13 21:42:51,171 INFO  L192         MainTranslator]: Completed translation
[2019-10-13 21:42:51,172 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:42:51 WrapperNode
[2019-10-13 21:42:51,173 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2019-10-13 21:42:51,174 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2019-10-13 21:42:51,174 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2019-10-13 21:42:51,174 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2019-10-13 21:42:51,189 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:42:51" (1/1) ...
[2019-10-13 21:42:51,189 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:42:51" (1/1) ...
[2019-10-13 21:42:51,234 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:42:51" (1/1) ...
[2019-10-13 21:42:51,235 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:42:51" (1/1) ...
[2019-10-13 21:42:51,341 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:42:51" (1/1) ...
[2019-10-13 21:42:51,383 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:42:51" (1/1) ...
[2019-10-13 21:42:51,408 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:42:51" (1/1) ...
[2019-10-13 21:42:51,445 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2019-10-13 21:42:51,446 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2019-10-13 21:42:51,446 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2019-10-13 21:42:51,446 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2019-10-13 21:42:51,448 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:42:51" (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 21:42:51,532 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2019-10-13 21:42:51,532 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2019-10-13 21:42:51,533 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output
[2019-10-13 21:42:51,533 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output2
[2019-10-13 21:42:51,533 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output3
[2019-10-13 21:42:51,533 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output4
[2019-10-13 21:42:51,534 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2019-10-13 21:42:51,534 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output
[2019-10-13 21:42:51,534 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output2
[2019-10-13 21:42:51,535 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output3
[2019-10-13 21:42:51,535 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output4
[2019-10-13 21:42:51,536 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2019-10-13 21:42:51,536 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int
[2019-10-13 21:42:51,536 INFO  L130     BoogieDeclarations]: Found specification of procedure exit
[2019-10-13 21:42:51,536 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2019-10-13 21:42:51,536 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2019-10-13 21:42:51,537 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2019-10-13 21:42:56,949 INFO  L279             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2019-10-13 21:42:56,949 INFO  L284             CfgBuilder]: Removed 1 assume(true) statements.
[2019-10-13 21:42:56,953 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:42:56 BoogieIcfgContainer
[2019-10-13 21:42:56,953 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2019-10-13 21:42:56,954 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2019-10-13 21:42:56,954 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2019-10-13 21:42:56,956 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2019-10-13 21:42:56,957 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 09:42:48" (1/3) ...
[2019-10-13 21:42:56,958 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e7e0727 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:42:56, skipping insertion in model container
[2019-10-13 21:42:56,958 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:42:51" (2/3) ...
[2019-10-13 21:42:56,958 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e7e0727 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:42:56, skipping insertion in model container
[2019-10-13 21:42:56,958 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:42:56" (3/3) ...
[2019-10-13 21:42:56,960 INFO  L109   eAbstractionObserver]: Analyzing ICFG Problem04_label44.c
[2019-10-13 21:42:56,971 INFO  L152   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2019-10-13 21:42:56,981 INFO  L164   ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2019-10-13 21:42:56,993 INFO  L249      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2019-10-13 21:42:57,030 INFO  L373      AbstractCegarLoop]: Interprodecural is true
[2019-10-13 21:42:57,030 INFO  L374      AbstractCegarLoop]: Hoare is true
[2019-10-13 21:42:57,031 INFO  L375      AbstractCegarLoop]: Compute interpolants for FPandBP
[2019-10-13 21:42:57,031 INFO  L376      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2019-10-13 21:42:57,031 INFO  L377      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2019-10-13 21:42:57,031 INFO  L378      AbstractCegarLoop]: Difference is false
[2019-10-13 21:42:57,031 INFO  L379      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2019-10-13 21:42:57,031 INFO  L383      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2019-10-13 21:42:57,068 INFO  L276                IsEmpty]: Start isEmpty. Operand 785 states.
[2019-10-13 21:42:57,109 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 768
[2019-10-13 21:42:57,109 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-13 21:42:57,111 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 21:42:57,113 INFO  L410      AbstractCegarLoop]: === Iteration 1 === [calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-13 21:42:57,119 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-13 21:42:57,120 INFO  L82        PathProgramCache]: Analyzing trace with hash -1899134567, now seen corresponding path program 1 times
[2019-10-13 21:42:57,129 INFO  L157   tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2019-10-13 21:42:57,129 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760068288]
[2019-10-13 21:42:57,130 INFO  L116   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 21:42:57,130 INFO  L116   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 21:42:57,131 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-13 21:42:57,606 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 21:42:59,303 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 21:42:59,303 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760068288]
[2019-10-13 21:42:59,304 INFO  L223   tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-10-13 21:42:59,304 INFO  L236   tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2019-10-13 21:42:59,305 INFO  L342   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228462159]
[2019-10-13 21:42:59,311 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 3 states
[2019-10-13 21:42:59,311 INFO  L137   tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2019-10-13 21:42:59,324 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2019-10-13 21:42:59,325 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2019-10-13 21:42:59,328 INFO  L87              Difference]: Start difference. First operand 785 states. Second operand 3 states.
[2019-10-13 21:43:04,033 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-10-13 21:43:04,033 INFO  L93              Difference]: Finished difference Result 2343 states and 4615 transitions.
[2019-10-13 21:43:04,033 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2019-10-13 21:43:04,035 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 767
[2019-10-13 21:43:04,039 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-10-13 21:43:04,092 INFO  L225             Difference]: With dead ends: 2343
[2019-10-13 21:43:04,092 INFO  L226             Difference]: Without dead ends: 1555
[2019-10-13 21:43:04,107 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 21:43:04,135 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 1555 states.
[2019-10-13 21:43:04,328 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 1555 to 1555.
[2019-10-13 21:43:04,330 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 1555 states.
[2019-10-13 21:43:04,343 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 1555 states to 1555 states and 2847 transitions.
[2019-10-13 21:43:04,346 INFO  L78                 Accepts]: Start accepts. Automaton has 1555 states and 2847 transitions. Word has length 767
[2019-10-13 21:43:04,351 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-10-13 21:43:04,351 INFO  L462      AbstractCegarLoop]: Abstraction has 1555 states and 2847 transitions.
[2019-10-13 21:43:04,351 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2019-10-13 21:43:04,352 INFO  L276                IsEmpty]: Start isEmpty. Operand 1555 states and 2847 transitions.
[2019-10-13 21:43:04,408 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 783
[2019-10-13 21:43:04,408 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-13 21:43:04,410 INFO  L380         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]
[2019-10-13 21:43:04,410 INFO  L410      AbstractCegarLoop]: === Iteration 2 === [calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-13 21:43:04,412 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-13 21:43:04,413 INFO  L82        PathProgramCache]: Analyzing trace with hash 1340659814, now seen corresponding path program 1 times
[2019-10-13 21:43:04,413 INFO  L157   tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2019-10-13 21:43:04,414 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455638502]
[2019-10-13 21:43:04,414 INFO  L116   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 21:43:04,415 INFO  L116   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 21:43:04,415 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-13 21:43:04,547 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 21:43:05,163 INFO  L134       CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-10-13 21:43:05,163 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455638502]
[2019-10-13 21:43:05,163 INFO  L223   tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-10-13 21:43:05,164 INFO  L236   tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6
[2019-10-13 21:43:05,164 INFO  L342   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864060009]
[2019-10-13 21:43:05,167 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 6 states
[2019-10-13 21:43:05,167 INFO  L137   tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2019-10-13 21:43:05,167 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2019-10-13 21:43:05,168 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30
[2019-10-13 21:43:05,168 INFO  L87              Difference]: Start difference. First operand 1555 states and 2847 transitions. Second operand 6 states.
[2019-10-13 21:43:11,750 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-10-13 21:43:11,750 INFO  L93              Difference]: Finished difference Result 4764 states and 8788 transitions.
[2019-10-13 21:43:11,750 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. 
[2019-10-13 21:43:11,750 INFO  L78                 Accepts]: Start accepts. Automaton has 6 states. Word has length 782
[2019-10-13 21:43:11,751 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-10-13 21:43:11,773 INFO  L225             Difference]: With dead ends: 4764
[2019-10-13 21:43:11,773 INFO  L226             Difference]: Without dead ends: 3214
[2019-10-13 21:43:11,780 INFO  L600         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
[2019-10-13 21:43:11,785 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 3214 states.
[2019-10-13 21:43:11,919 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 3214 to 3154.
[2019-10-13 21:43:11,919 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 3154 states.
[2019-10-13 21:43:11,931 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 3154 states to 3154 states and 5656 transitions.
[2019-10-13 21:43:11,931 INFO  L78                 Accepts]: Start accepts. Automaton has 3154 states and 5656 transitions. Word has length 782
[2019-10-13 21:43:11,932 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-10-13 21:43:11,932 INFO  L462      AbstractCegarLoop]: Abstraction has 3154 states and 5656 transitions.
[2019-10-13 21:43:11,932 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 6 states.
[2019-10-13 21:43:11,932 INFO  L276                IsEmpty]: Start isEmpty. Operand 3154 states and 5656 transitions.
[2019-10-13 21:43:11,963 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 796
[2019-10-13 21:43:11,964 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-13 21:43:11,965 INFO  L380         BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:43:11,965 INFO  L410      AbstractCegarLoop]: === Iteration 3 === [calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-13 21:43:11,965 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-13 21:43:11,966 INFO  L82        PathProgramCache]: Analyzing trace with hash 949885760, now seen corresponding path program 1 times
[2019-10-13 21:43:11,966 INFO  L157   tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2019-10-13 21:43:11,966 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863436146]
[2019-10-13 21:43:11,967 INFO  L116   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 21:43:11,967 INFO  L116   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 21:43:11,967 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-13 21:43:12,032 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 21:43:12,787 INFO  L134       CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-10-13 21:43:12,788 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863436146]
[2019-10-13 21:43:12,791 INFO  L223   tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-10-13 21:43:12,791 INFO  L236   tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6
[2019-10-13 21:43:12,792 INFO  L342   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964588703]
[2019-10-13 21:43:12,793 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 6 states
[2019-10-13 21:43:12,794 INFO  L137   tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2019-10-13 21:43:12,795 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2019-10-13 21:43:12,795 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30
[2019-10-13 21:43:12,795 INFO  L87              Difference]: Start difference. First operand 3154 states and 5656 transitions. Second operand 6 states.
[2019-10-13 21:43:18,195 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-10-13 21:43:18,195 INFO  L93              Difference]: Finished difference Result 8033 states and 14305 transitions.
[2019-10-13 21:43:18,200 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2019-10-13 21:43:18,200 INFO  L78                 Accepts]: Start accepts. Automaton has 6 states. Word has length 795
[2019-10-13 21:43:18,200 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-10-13 21:43:18,229 INFO  L225             Difference]: With dead ends: 8033
[2019-10-13 21:43:18,229 INFO  L226             Difference]: Without dead ends: 4884
[2019-10-13 21:43:18,238 INFO  L600         BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72
[2019-10-13 21:43:18,244 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 4884 states.
[2019-10-13 21:43:18,362 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 4884 to 4855.
[2019-10-13 21:43:18,363 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 4855 states.
[2019-10-13 21:43:18,389 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 4855 states to 4855 states and 7630 transitions.
[2019-10-13 21:43:18,390 INFO  L78                 Accepts]: Start accepts. Automaton has 4855 states and 7630 transitions. Word has length 795
[2019-10-13 21:43:18,390 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-10-13 21:43:18,390 INFO  L462      AbstractCegarLoop]: Abstraction has 4855 states and 7630 transitions.
[2019-10-13 21:43:18,391 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 6 states.
[2019-10-13 21:43:18,391 INFO  L276                IsEmpty]: Start isEmpty. Operand 4855 states and 7630 transitions.
[2019-10-13 21:43:18,414 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 802
[2019-10-13 21:43:18,414 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-13 21:43:18,415 INFO  L380         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]
[2019-10-13 21:43:18,415 INFO  L410      AbstractCegarLoop]: === Iteration 4 === [calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-13 21:43:18,416 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-13 21:43:18,416 INFO  L82        PathProgramCache]: Analyzing trace with hash -599419519, now seen corresponding path program 1 times
[2019-10-13 21:43:18,417 INFO  L157   tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2019-10-13 21:43:18,417 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144860862]
[2019-10-13 21:43:18,418 INFO  L116   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 21:43:18,418 INFO  L116   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 21:43:18,418 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-13 21:43:18,498 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 21:43:19,140 INFO  L134       CoverageAnalysis]: Checked inductivity of 43 backedges. 41 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-10-13 21:43:19,141 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144860862]
[2019-10-13 21:43:19,142 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561224183]
[2019-10-13 21:43:19,142 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 21:43:19,673 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 21:43:19,679 INFO  L256         TraceCheckSpWp]: Trace formula consists of 1210 conjuncts, 10 conjunts are in the unsatisfiable core
[2019-10-13 21:43:19,738 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
[2019-10-13 21:43:20,431 INFO  L134       CoverageAnalysis]: Checked inductivity of 43 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked.
[2019-10-13 21:43:20,432 INFO  L321         TraceCheckSpWp]: Computing backward predicates...
[2019-10-13 21:43:20,974 INFO  L134       CoverageAnalysis]: Checked inductivity of 43 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked.
[2019-10-13 21:43:20,974 INFO  L223   tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences.
[2019-10-13 21:43:20,975 INFO  L236   tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 7
[2019-10-13 21:43:20,975 INFO  L342   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466512836]
[2019-10-13 21:43:20,977 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 3 states
[2019-10-13 21:43:20,977 INFO  L137   tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2019-10-13 21:43:20,977 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2019-10-13 21:43:20,978 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42
[2019-10-13 21:43:20,978 INFO  L87              Difference]: Start difference. First operand 4855 states and 7630 transitions. Second operand 3 states.