/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.trace.refinement.strategy SIFA_TAIPAN --sifa.abstract.domain CompoundDomain --rcfgbuilder.size.of.a.code.block LoopFreeBlock --sifa.call.summarizer TopInputCallSummarizer --sifa.fluid SizeLimitFluid --sifa.simplification.technique SIMPLIFY_QUICK -i ../../../trunk/examples/svcomp/eca-rers2012/Problem04_label29.c


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


This is Ultimate 0.1.24-fb55353
[2019-11-07 01:43:48,571 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2019-11-07 01:43:48,573 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2019-11-07 01:43:48,593 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2019-11-07 01:43:48,594 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2019-11-07 01:43:48,596 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2019-11-07 01:43:48,598 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2019-11-07 01:43:48,607 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2019-11-07 01:43:48,612 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2019-11-07 01:43:48,615 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
[2019-11-07 01:43:48,616 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
[2019-11-07 01:43:48,618 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2019-11-07 01:43:48,618 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2019-11-07 01:43:48,620 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2019-11-07 01:43:48,621 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2019-11-07 01:43:48,623 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2019-11-07 01:43:48,625 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2019-11-07 01:43:48,626 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2019-11-07 01:43:48,627 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2019-11-07 01:43:48,632 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2019-11-07 01:43:48,635 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2019-11-07 01:43:48,636 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2019-11-07 01:43:48,639 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2019-11-07 01:43:48,640 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2019-11-07 01:43:48,642 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2019-11-07 01:43:48,642 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2019-11-07 01:43:48,642 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2019-11-07 01:43:48,644 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2019-11-07 01:43:48,644 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2019-11-07 01:43:48,646 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2019-11-07 01:43:48,647 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2019-11-07 01:43:48,649 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2019-11-07 01:43:48,649 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2019-11-07 01:43:48,650 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2019-11-07 01:43:48,652 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2019-11-07 01:43:48,652 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
[2019-11-07 01:43:48,653 INFO  L184        SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2019-11-07 01:43:48,653 INFO  L184        SettingsManager]: ReqParser provides no preferences, ignoring...
[2019-11-07 01:43:48,654 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
[2019-11-07 01:43:48,655 INFO  L181        SettingsManager]: Resetting Witness Parser preferences to default values
[2019-11-07 01:43:48,657 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2019-11-07 01:43:48,658 INFO  L101        SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf
[2019-11-07 01:43:48,691 INFO  L113        SettingsManager]: Loading preferences was successful
[2019-11-07 01:43:48,691 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2019-11-07 01:43:48,692 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2019-11-07 01:43:48,697 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2019-11-07 01:43:48,698 INFO  L138        SettingsManager]:  * Use SBE=true
[2019-11-07 01:43:48,698 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2019-11-07 01:43:48,698 INFO  L138        SettingsManager]:  * sizeof long=4
[2019-11-07 01:43:48,698 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2019-11-07 01:43:48,699 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2019-11-07 01:43:48,699 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2019-11-07 01:43:48,699 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2019-11-07 01:43:48,699 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2019-11-07 01:43:48,699 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2019-11-07 01:43:48,700 INFO  L138        SettingsManager]:  * sizeof long double=12
[2019-11-07 01:43:48,700 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2019-11-07 01:43:48,700 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2019-11-07 01:43:48,700 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2019-11-07 01:43:48,700 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2019-11-07 01:43:48,700 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2019-11-07 01:43:48,702 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2019-11-07 01:43:48,702 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2019-11-07 01:43:48,702 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2019-11-07 01:43:48,703 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2019-11-07 01:43:48,703 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2019-11-07 01:43:48,703 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2019-11-07 01:43:48,703 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2019-11-07 01:43:48,703 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2019-11-07 01:43:48,703 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2019-11-07 01:43:48,704 INFO  L138        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> SIFA_TAIPAN
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> CompoundDomain
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> LoopFreeBlock
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Call Summarizer -> TopInputCallSummarizer
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Fluid -> SizeLimitFluid
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Simplification Technique -> SIMPLIFY_QUICK
[2019-11-07 01:43:48,976 INFO  L81    nceAwareModelManager]: Repository-Root is: /tmp
[2019-11-07 01:43:48,989 INFO  L258   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2019-11-07 01:43:48,992 INFO  L214   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2019-11-07 01:43:48,994 INFO  L271        PluginConnector]: Initializing CDTParser...
[2019-11-07 01:43:48,994 INFO  L275        PluginConnector]: CDTParser initialized
[2019-11-07 01:43:48,995 INFO  L428   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem04_label29.c
[2019-11-07 01:43:49,058 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7fb91ca16/a2be8ce56f4e4a7589d7612fd9ca3757/FLAG5107916be
[2019-11-07 01:43:49,826 INFO  L306              CDTParser]: Found 1 translation units.
[2019-11-07 01:43:49,827 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem04_label29.c
[2019-11-07 01:43:49,861 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7fb91ca16/a2be8ce56f4e4a7589d7612fd9ca3757/FLAG5107916be
[2019-11-07 01:43:49,905 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7fb91ca16/a2be8ce56f4e4a7589d7612fd9ca3757
[2019-11-07 01:43:49,916 INFO  L296   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2019-11-07 01:43:49,918 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2019-11-07 01:43:49,921 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2019-11-07 01:43:49,921 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2019-11-07 01:43:49,925 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2019-11-07 01:43:49,926 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:43:49" (1/1) ...
[2019-11-07 01:43:49,929 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63c96835 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:43:49, skipping insertion in model container
[2019-11-07 01:43:49,929 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:43:49" (1/1) ...
[2019-11-07 01:43:49,937 INFO  L142         MainTranslator]: Starting translation in SV-COMP mode 
[2019-11-07 01:43:50,113 INFO  L173         MainTranslator]: Built tables and reachable declarations
[2019-11-07 01:43:51,495 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2019-11-07 01:43:51,502 INFO  L188         MainTranslator]: Completed pre-run
[2019-11-07 01:43:52,241 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2019-11-07 01:43:52,291 INFO  L192         MainTranslator]: Completed translation
[2019-11-07 01:43:52,292 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:43:52 WrapperNode
[2019-11-07 01:43:52,292 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2019-11-07 01:43:52,293 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2019-11-07 01:43:52,293 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2019-11-07 01:43:52,293 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2019-11-07 01:43:52,314 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:43:52" (1/1) ...
[2019-11-07 01:43:52,314 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:43:52" (1/1) ...
[2019-11-07 01:43:52,399 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:43:52" (1/1) ...
[2019-11-07 01:43:52,401 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:43:52" (1/1) ...
[2019-11-07 01:43:52,518 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:43:52" (1/1) ...
[2019-11-07 01:43:52,556 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:43:52" (1/1) ...
[2019-11-07 01:43:52,586 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:43:52" (1/1) ...
[2019-11-07 01:43:52,616 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2019-11-07 01:43:52,617 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2019-11-07 01:43:52,617 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2019-11-07 01:43:52,617 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2019-11-07 01:43:52,618 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:43:52" (1/1) ...
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2019-11-07 01:43:52,704 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2019-11-07 01:43:52,704 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2019-11-07 01:43:52,704 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output
[2019-11-07 01:43:52,705 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output2
[2019-11-07 01:43:52,705 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output3
[2019-11-07 01:43:52,705 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output4
[2019-11-07 01:43:52,706 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2019-11-07 01:43:52,706 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output
[2019-11-07 01:43:52,706 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output2
[2019-11-07 01:43:52,706 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output3
[2019-11-07 01:43:52,706 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output4
[2019-11-07 01:43:52,707 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2019-11-07 01:43:52,708 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int
[2019-11-07 01:43:52,708 INFO  L130     BoogieDeclarations]: Found specification of procedure exit
[2019-11-07 01:43:52,708 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2019-11-07 01:43:52,708 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2019-11-07 01:43:52,709 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2019-11-07 01:43:57,640 INFO  L279             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2019-11-07 01:43:57,640 INFO  L284             CfgBuilder]: Removed 1 assume(true) statements.
[2019-11-07 01:43:57,644 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:43:57 BoogieIcfgContainer
[2019-11-07 01:43:57,644 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2019-11-07 01:43:57,646 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2019-11-07 01:43:57,646 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2019-11-07 01:43:57,650 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2019-11-07 01:43:57,650 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:43:49" (1/3) ...
[2019-11-07 01:43:57,651 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f70b7f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:43:57, skipping insertion in model container
[2019-11-07 01:43:57,651 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:43:52" (2/3) ...
[2019-11-07 01:43:57,651 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f70b7f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:43:57, skipping insertion in model container
[2019-11-07 01:43:57,652 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:43:57" (3/3) ...
[2019-11-07 01:43:57,654 INFO  L109   eAbstractionObserver]: Analyzing ICFG Problem04_label29.c
[2019-11-07 01:43:57,664 INFO  L152   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2019-11-07 01:43:57,674 INFO  L164   ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2019-11-07 01:43:57,686 INFO  L249      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2019-11-07 01:43:57,725 INFO  L373      AbstractCegarLoop]: Interprodecural is true
[2019-11-07 01:43:57,725 INFO  L374      AbstractCegarLoop]: Hoare is true
[2019-11-07 01:43:57,725 INFO  L375      AbstractCegarLoop]: Compute interpolants for FPandBP
[2019-11-07 01:43:57,725 INFO  L376      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2019-11-07 01:43:57,725 INFO  L377      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2019-11-07 01:43:57,725 INFO  L378      AbstractCegarLoop]: Difference is false
[2019-11-07 01:43:57,726 INFO  L379      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2019-11-07 01:43:57,726 INFO  L383      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2019-11-07 01:43:57,761 INFO  L276                IsEmpty]: Start isEmpty. Operand 785 states.
[2019-11-07 01:43:57,827 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 768
[2019-11-07 01:43:57,827 INFO  L402         BasicCegarLoop]: Found error trace
[2019-11-07 01:43:57,829 INFO  L410         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-11-07 01:43:57,831 INFO  L410      AbstractCegarLoop]: === Iteration 1 === [calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-11-07 01:43:57,837 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-11-07 01:43:57,838 INFO  L82        PathProgramCache]: Analyzing trace with hash -1899134055, now seen corresponding path program 1 times
[2019-11-07 01:43:57,848 INFO  L161   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2019-11-07 01:43:57,848 INFO  L337   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745264970]
[2019-11-07 01:43:57,849 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-11-07 01:43:58,311 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-07 01:43:59,946 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-11-07 01:43:59,947 INFO  L337   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745264970]
[2019-11-07 01:43:59,948 INFO  L218   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-11-07 01:43:59,948 INFO  L231   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2019-11-07 01:43:59,950 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566864682]
[2019-11-07 01:43:59,957 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 3 states
[2019-11-07 01:43:59,957 INFO  L141   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2019-11-07 01:43:59,972 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2019-11-07 01:43:59,973 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2019-11-07 01:43:59,975 INFO  L87              Difference]: Start difference. First operand 785 states. Second operand 3 states.
[2019-11-07 01:44:04,340 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-11-07 01:44:04,340 INFO  L93              Difference]: Finished difference Result 2343 states and 4615 transitions.
[2019-11-07 01:44:04,341 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2019-11-07 01:44:04,342 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 767
[2019-11-07 01:44:04,354 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-11-07 01:44:04,442 INFO  L225             Difference]: With dead ends: 2343
[2019-11-07 01:44:04,442 INFO  L226             Difference]: Without dead ends: 1555
[2019-11-07 01:44:04,459 INFO  L630         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
[2019-11-07 01:44:04,484 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 1555 states.
[2019-11-07 01:44:04,614 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 1555 to 1555.
[2019-11-07 01:44:04,615 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 1555 states.
[2019-11-07 01:44:04,625 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 1555 states to 1555 states and 3003 transitions.
[2019-11-07 01:44:04,627 INFO  L78                 Accepts]: Start accepts. Automaton has 1555 states and 3003 transitions. Word has length 767
[2019-11-07 01:44:04,631 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-11-07 01:44:04,632 INFO  L462      AbstractCegarLoop]: Abstraction has 1555 states and 3003 transitions.
[2019-11-07 01:44:04,632 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2019-11-07 01:44:04,632 INFO  L276                IsEmpty]: Start isEmpty. Operand 1555 states and 3003 transitions.
[2019-11-07 01:44:04,658 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 776
[2019-11-07 01:44:04,658 INFO  L402         BasicCegarLoop]: Found error trace
[2019-11-07 01:44:04,659 INFO  L410         BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-11-07 01:44:04,659 INFO  L410      AbstractCegarLoop]: === Iteration 2 === [calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-11-07 01:44:04,659 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-11-07 01:44:04,660 INFO  L82        PathProgramCache]: Analyzing trace with hash -1537904664, now seen corresponding path program 1 times
[2019-11-07 01:44:04,660 INFO  L161   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2019-11-07 01:44:04,660 INFO  L337   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115798612]
[2019-11-07 01:44:04,661 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-11-07 01:44:04,851 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-07 01:44:06,219 INFO  L134       CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-11-07 01:44:06,220 INFO  L337   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115798612]
[2019-11-07 01:44:06,220 INFO  L218   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-11-07 01:44:06,221 INFO  L231   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2019-11-07 01:44:06,221 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198990040]
[2019-11-07 01:44:06,223 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 4 states
[2019-11-07 01:44:06,223 INFO  L141   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2019-11-07 01:44:06,224 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2019-11-07 01:44:06,224 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2019-11-07 01:44:06,224 INFO  L87              Difference]: Start difference. First operand 1555 states and 3003 transitions. Second operand 4 states.
[2019-11-07 01:44:13,414 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-11-07 01:44:13,415 INFO  L93              Difference]: Finished difference Result 6201 states and 12123 transitions.
[2019-11-07 01:44:13,415 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2019-11-07 01:44:13,415 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 775
[2019-11-07 01:44:13,416 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-11-07 01:44:13,446 INFO  L225             Difference]: With dead ends: 6201
[2019-11-07 01:44:13,446 INFO  L226             Difference]: Without dead ends: 4651
[2019-11-07 01:44:13,451 INFO  L630         BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2019-11-07 01:44:13,457 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 4651 states.
[2019-11-07 01:44:13,619 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 4651 to 4651.
[2019-11-07 01:44:13,619 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 4651 states.
[2019-11-07 01:44:13,637 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 4651 states to 4651 states and 7921 transitions.
[2019-11-07 01:44:13,637 INFO  L78                 Accepts]: Start accepts. Automaton has 4651 states and 7921 transitions. Word has length 775
[2019-11-07 01:44:13,639 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-11-07 01:44:13,639 INFO  L462      AbstractCegarLoop]: Abstraction has 4651 states and 7921 transitions.
[2019-11-07 01:44:13,639 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2019-11-07 01:44:13,640 INFO  L276                IsEmpty]: Start isEmpty. Operand 4651 states and 7921 transitions.
[2019-11-07 01:44:13,664 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 787
[2019-11-07 01:44:13,664 INFO  L402         BasicCegarLoop]: Found error trace
[2019-11-07 01:44:13,666 INFO  L410         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]
[2019-11-07 01:44:13,666 INFO  L410      AbstractCegarLoop]: === Iteration 3 === [calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-11-07 01:44:13,667 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-11-07 01:44:13,667 INFO  L82        PathProgramCache]: Analyzing trace with hash -1772121122, now seen corresponding path program 1 times
[2019-11-07 01:44:13,668 INFO  L161   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2019-11-07 01:44:13,668 INFO  L337   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11300173]
[2019-11-07 01:44:13,669 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-11-07 01:44:13,854 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-07 01:44:15,101 INFO  L134       CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked.
[2019-11-07 01:44:15,101 INFO  L337   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11300173]
[2019-11-07 01:44:15,102 INFO  L337   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241986998]
[2019-11-07 01:44:15,102 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2019-11-07 01:44:15,403 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-07 01:44:15,407 INFO  L256         TraceCheckSpWp]: Trace formula consists of 1138 conjuncts, 10 conjunts are in the unsatisfiable core
[2019-11-07 01:44:15,479 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
[2019-11-07 01:44:16,181 INFO  L134       CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-11-07 01:44:16,182 INFO  L321         TraceCheckSpWp]: Computing backward predicates...
[2019-11-07 01:44:16,947 INFO  L134       CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-11-07 01:44:16,948 INFO  L218   FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences.
[2019-11-07 01:44:16,948 INFO  L231   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4] total 5
[2019-11-07 01:44:16,949 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63560445]
[2019-11-07 01:44:16,951 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 3 states
[2019-11-07 01:44:16,951 INFO  L141   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2019-11-07 01:44:16,952 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2019-11-07 01:44:16,952 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2019-11-07 01:44:16,952 INFO  L87              Difference]: Start difference. First operand 4651 states and 7921 transitions. Second operand 3 states.
[2019-11-07 01:44:21,240 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-11-07 01:44:21,240 INFO  L93              Difference]: Finished difference Result 13941 states and 24107 transitions.
[2019-11-07 01:44:21,241 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2019-11-07 01:44:21,241 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 786
[2019-11-07 01:44:21,243 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-11-07 01:44:21,285 INFO  L225             Difference]: With dead ends: 13941
[2019-11-07 01:44:21,285 INFO  L226             Difference]: Without dead ends: 9295
[2019-11-07 01:44:21,299 INFO  L630         BasicCegarLoop]: 0 DeclaredPredicates, 1582 GetRequests, 1567 SyntacticMatches, 12 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2019-11-07 01:44:21,312 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 9295 states.
[2019-11-07 01:44:21,520 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 9295 to 9295.
[2019-11-07 01:44:21,521 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 9295 states.
[2019-11-07 01:44:21,542 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 9295 states to 9295 states and 14096 transitions.
[2019-11-07 01:44:21,542 INFO  L78                 Accepts]: Start accepts. Automaton has 9295 states and 14096 transitions. Word has length 786
[2019-11-07 01:44:21,544 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-11-07 01:44:21,544 INFO  L462      AbstractCegarLoop]: Abstraction has 9295 states and 14096 transitions.
[2019-11-07 01:44:21,544 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2019-11-07 01:44:21,545 INFO  L276                IsEmpty]: Start isEmpty. Operand 9295 states and 14096 transitions.
[2019-11-07 01:44:21,580 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 928
[2019-11-07 01:44:21,580 INFO  L402         BasicCegarLoop]: Found error trace
[2019-11-07 01:44:21,581 INFO  L410         BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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]
[2019-11-07 01:44:21,787 WARN  L499      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2019-11-07 01:44:21,787 INFO  L410      AbstractCegarLoop]: === Iteration 4 === [calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-11-07 01:44:21,788 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-11-07 01:44:21,788 INFO  L82        PathProgramCache]: Analyzing trace with hash -1198660060, now seen corresponding path program 1 times
[2019-11-07 01:44:21,788 INFO  L161   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2019-11-07 01:44:21,789 INFO  L337   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634763480]
[2019-11-07 01:44:21,789 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-11-07 01:44:21,863 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-07 01:44:22,736 INFO  L134       CoverageAnalysis]: Checked inductivity of 200 backedges. 168 proven. 15 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked.
[2019-11-07 01:44:22,738 INFO  L337   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634763480]
[2019-11-07 01:44:22,738 INFO  L337   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428521802]
[2019-11-07 01:44:22,738 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2019-11-07 01:44:23,102 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-07 01:44:23,105 INFO  L256         TraceCheckSpWp]: Trace formula consists of 1397 conjuncts, 4 conjunts are in the unsatisfiable core
[2019-11-07 01:44:23,125 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
[2019-11-07 01:44:23,588 INFO  L134       CoverageAnalysis]: Checked inductivity of 200 backedges. 186 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked.
[2019-11-07 01:44:23,589 INFO  L321         TraceCheckSpWp]: Computing backward predicates...