/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/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem04_label34.c


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


This is Ultimate 0.1.24-6598664
[2019-11-23 23:39:07,288 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2019-11-23 23:39:07,291 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2019-11-23 23:39:07,309 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2019-11-23 23:39:07,309 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2019-11-23 23:39:07,311 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2019-11-23 23:39:07,313 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2019-11-23 23:39:07,322 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2019-11-23 23:39:07,326 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2019-11-23 23:39:07,329 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
[2019-11-23 23:39:07,331 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
[2019-11-23 23:39:07,333 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2019-11-23 23:39:07,333 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2019-11-23 23:39:07,336 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2019-11-23 23:39:07,338 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2019-11-23 23:39:07,340 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2019-11-23 23:39:07,341 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2019-11-23 23:39:07,342 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2019-11-23 23:39:07,343 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2019-11-23 23:39:07,348 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2019-11-23 23:39:07,353 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2019-11-23 23:39:07,357 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2019-11-23 23:39:07,358 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2019-11-23 23:39:07,359 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2019-11-23 23:39:07,361 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2019-11-23 23:39:07,361 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2019-11-23 23:39:07,362 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2019-11-23 23:39:07,363 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2019-11-23 23:39:07,364 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2019-11-23 23:39:07,365 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2019-11-23 23:39:07,365 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2019-11-23 23:39:07,367 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2019-11-23 23:39:07,368 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2019-11-23 23:39:07,369 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2019-11-23 23:39:07,370 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2019-11-23 23:39:07,370 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
[2019-11-23 23:39:07,371 INFO  L184        SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2019-11-23 23:39:07,371 INFO  L184        SettingsManager]: ReqParser provides no preferences, ignoring...
[2019-11-23 23:39:07,371 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
[2019-11-23 23:39:07,372 INFO  L181        SettingsManager]: Resetting Witness Parser preferences to default values
[2019-11-23 23:39:07,373 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2019-11-23 23:39:07,374 INFO  L101        SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf
[2019-11-23 23:39:07,402 INFO  L113        SettingsManager]: Loading preferences was successful
[2019-11-23 23:39:07,403 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2019-11-23 23:39:07,411 INFO  L136        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2019-11-23 23:39:07,411 INFO  L138        SettingsManager]:  * User list type=DISABLED
[2019-11-23 23:39:07,411 INFO  L136        SettingsManager]: Preferences of Abstract Interpretation differ from their defaults:
[2019-11-23 23:39:07,411 INFO  L138        SettingsManager]:  * Explicit value domain=true
[2019-11-23 23:39:07,412 INFO  L138        SettingsManager]:  * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain
[2019-11-23 23:39:07,412 INFO  L138        SettingsManager]:  * Octagon Domain=false
[2019-11-23 23:39:07,412 INFO  L138        SettingsManager]:  * Abstract domain=CompoundDomain
[2019-11-23 23:39:07,412 INFO  L138        SettingsManager]:  * Check feasibility of abstract posts with an SMT solver=true
[2019-11-23 23:39:07,412 INFO  L138        SettingsManager]:  * Use the RCFG-of-the-future interface=true
[2019-11-23 23:39:07,412 INFO  L138        SettingsManager]:  * Interval Domain=false
[2019-11-23 23:39:07,413 INFO  L136        SettingsManager]: Preferences of Sifa differ from their defaults:
[2019-11-23 23:39:07,413 INFO  L138        SettingsManager]:  * Call Summarizer=TopInputCallSummarizer
[2019-11-23 23:39:07,413 INFO  L138        SettingsManager]:  * Simplification Technique=SIMPLIFY_QUICK
[2019-11-23 23:39:07,414 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2019-11-23 23:39:07,414 INFO  L138        SettingsManager]:  * sizeof long=4
[2019-11-23 23:39:07,414 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2019-11-23 23:39:07,414 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2019-11-23 23:39:07,414 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2019-11-23 23:39:07,414 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2019-11-23 23:39:07,415 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2019-11-23 23:39:07,415 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2019-11-23 23:39:07,415 INFO  L138        SettingsManager]:  * sizeof long double=12
[2019-11-23 23:39:07,415 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2019-11-23 23:39:07,415 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2019-11-23 23:39:07,416 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2019-11-23 23:39:07,417 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2019-11-23 23:39:07,417 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2019-11-23 23:39:07,419 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2019-11-23 23:39:07,419 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2019-11-23 23:39:07,420 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2019-11-23 23:39:07,420 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2019-11-23 23:39:07,420 INFO  L138        SettingsManager]:  * Trace refinement strategy=SIFA_TAIPAN
[2019-11-23 23:39:07,420 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2019-11-23 23:39:07,420 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2019-11-23 23:39:07,420 INFO  L138        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2019-11-23 23:39:07,421 INFO  L138        SettingsManager]:  * Abstract interpretation Mode=USE_PREDICATES
[2019-11-23 23:39:07,717 INFO  L81    nceAwareModelManager]: Repository-Root is: /tmp
[2019-11-23 23:39:07,738 INFO  L258   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2019-11-23 23:39:07,742 INFO  L214   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2019-11-23 23:39:07,743 INFO  L271        PluginConnector]: Initializing CDTParser...
[2019-11-23 23:39:07,743 INFO  L275        PluginConnector]: CDTParser initialized
[2019-11-23 23:39:07,744 INFO  L428   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem04_label34.c
[2019-11-23 23:39:07,817 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/799a96b52/b2bc316b3cde411cb894f10d6d832fa0/FLAG6bb9b5f01
[2019-11-23 23:39:08,542 INFO  L306              CDTParser]: Found 1 translation units.
[2019-11-23 23:39:08,542 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem04_label34.c
[2019-11-23 23:39:08,569 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/799a96b52/b2bc316b3cde411cb894f10d6d832fa0/FLAG6bb9b5f01
[2019-11-23 23:39:08,708 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/799a96b52/b2bc316b3cde411cb894f10d6d832fa0
[2019-11-23 23:39:08,716 INFO  L296   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2019-11-23 23:39:08,717 INFO  L131        ToolchainWalker]: Walking toolchain with 5 elements.
[2019-11-23 23:39:08,718 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2019-11-23 23:39:08,719 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2019-11-23 23:39:08,722 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2019-11-23 23:39:08,723 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 11:39:08" (1/1) ...
[2019-11-23 23:39:08,726 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@705ef929 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:39:08, skipping insertion in model container
[2019-11-23 23:39:08,726 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 11:39:08" (1/1) ...
[2019-11-23 23:39:08,735 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2019-11-23 23:39:08,906 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2019-11-23 23:39:10,314 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2019-11-23 23:39:10,324 INFO  L203         MainTranslator]: Completed pre-run
[2019-11-23 23:39:11,063 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2019-11-23 23:39:11,111 INFO  L208         MainTranslator]: Completed translation
[2019-11-23 23:39:11,111 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:39:11 WrapperNode
[2019-11-23 23:39:11,111 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2019-11-23 23:39:11,112 INFO  L113        PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2019-11-23 23:39:11,112 INFO  L271        PluginConnector]: Initializing Boogie Procedure Inliner...
[2019-11-23 23:39:11,113 INFO  L275        PluginConnector]: Boogie Procedure Inliner initialized
[2019-11-23 23:39:11,124 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:39:11" (1/1) ...
[2019-11-23 23:39:11,189 INFO  L185        PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:39:11" (1/1) ...
[2019-11-23 23:39:11,385 INFO  L132        PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2019-11-23 23:39:11,386 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2019-11-23 23:39:11,386 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2019-11-23 23:39:11,386 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2019-11-23 23:39:11,401 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:39:11" (1/1) ...
[2019-11-23 23:39:11,402 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:39:11" (1/1) ...
[2019-11-23 23:39:11,419 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:39:11" (1/1) ...
[2019-11-23 23:39:11,419 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:39:11" (1/1) ...
[2019-11-23 23:39:11,511 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:39:11" (1/1) ...
[2019-11-23 23:39:11,551 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:39:11" (1/1) ...
[2019-11-23 23:39:11,587 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:39:11" (1/1) ...
[2019-11-23 23:39:11,626 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2019-11-23 23:39:11,627 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2019-11-23 23:39:11,627 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2019-11-23 23:39:11,627 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2019-11-23 23:39:11,628 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:39:11" (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
[2019-11-23 23:39:11,694 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2019-11-23 23:39:11,697 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2019-11-23 23:39:17,537 INFO  L279             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2019-11-23 23:39:17,538 INFO  L284             CfgBuilder]: Removed 13 assume(true) statements.
[2019-11-23 23:39:17,539 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 11:39:17 BoogieIcfgContainer
[2019-11-23 23:39:17,540 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2019-11-23 23:39:17,541 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2019-11-23 23:39:17,541 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2019-11-23 23:39:17,546 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2019-11-23 23:39:17,546 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 11:39:08" (1/3) ...
[2019-11-23 23:39:17,547 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e3a6585 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 11:39:17, skipping insertion in model container
[2019-11-23 23:39:17,548 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:39:11" (2/3) ...
[2019-11-23 23:39:17,548 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e3a6585 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 11:39:17, skipping insertion in model container
[2019-11-23 23:39:17,549 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 11:39:17" (3/3) ...
[2019-11-23 23:39:17,550 INFO  L109   eAbstractionObserver]: Analyzing ICFG Problem04_label34.c
[2019-11-23 23:39:17,560 INFO  L153   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2019-11-23 23:39:17,569 INFO  L165   ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2019-11-23 23:39:17,580 INFO  L249      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2019-11-23 23:39:17,626 INFO  L373      AbstractCegarLoop]: Interprodecural is true
[2019-11-23 23:39:17,627 INFO  L374      AbstractCegarLoop]: Hoare is true
[2019-11-23 23:39:17,627 INFO  L375      AbstractCegarLoop]: Compute interpolants for FPandBP
[2019-11-23 23:39:17,627 INFO  L376      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2019-11-23 23:39:17,627 INFO  L377      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2019-11-23 23:39:17,627 INFO  L378      AbstractCegarLoop]: Difference is false
[2019-11-23 23:39:17,627 INFO  L379      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2019-11-23 23:39:17,627 INFO  L383      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2019-11-23 23:39:17,663 INFO  L276                IsEmpty]: Start isEmpty. Operand 763 states.
[2019-11-23 23:39:17,709 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 756
[2019-11-23 23:39:17,709 INFO  L402         BasicCegarLoop]: Found error trace
[2019-11-23 23:39:17,711 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]
[2019-11-23 23:39:17,712 INFO  L410      AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-11-23 23:39:17,718 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-11-23 23:39:17,719 INFO  L82        PathProgramCache]: Analyzing trace with hash -1870341382, now seen corresponding path program 1 times
[2019-11-23 23:39:17,729 INFO  L163   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2019-11-23 23:39:17,729 INFO  L348   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349297270]
[2019-11-23 23:39:17,730 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-11-23 23:39:18,123 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-23 23:39:23,173 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-11-23 23:39:23,174 INFO  L348   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349297270]
[2019-11-23 23:39:23,174 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-11-23 23:39:23,175 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2019-11-23 23:39:23,176 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077768189]
[2019-11-23 23:39:23,182 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 5 states
[2019-11-23 23:39:23,182 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2019-11-23 23:39:23,192 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2019-11-23 23:39:23,193 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20
[2019-11-23 23:39:23,195 INFO  L87              Difference]: Start difference. First operand 763 states. Second operand 5 states.
[2019-11-23 23:39:32,576 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-11-23 23:39:32,577 INFO  L93              Difference]: Finished difference Result 3049 states and 6058 transitions.
[2019-11-23 23:39:32,578 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2019-11-23 23:39:32,579 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 755
[2019-11-23 23:39:32,586 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-11-23 23:39:32,629 INFO  L225             Difference]: With dead ends: 3049
[2019-11-23 23:39:32,630 INFO  L226             Difference]: Without dead ends: 2279
[2019-11-23 23:39:32,641 INFO  L630         BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 14 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20
[2019-11-23 23:39:32,666 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 2279 states.
[2019-11-23 23:39:32,776 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 2279 to 2277.
[2019-11-23 23:39:32,777 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 2277 states.
[2019-11-23 23:39:32,785 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 2277 states to 2277 states and 3423 transitions.
[2019-11-23 23:39:32,788 INFO  L78                 Accepts]: Start accepts. Automaton has 2277 states and 3423 transitions. Word has length 755
[2019-11-23 23:39:32,791 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-11-23 23:39:32,791 INFO  L462      AbstractCegarLoop]: Abstraction has 2277 states and 3423 transitions.
[2019-11-23 23:39:32,791 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2019-11-23 23:39:32,791 INFO  L276                IsEmpty]: Start isEmpty. Operand 2277 states and 3423 transitions.
[2019-11-23 23:39:32,862 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 776
[2019-11-23 23:39:32,862 INFO  L402         BasicCegarLoop]: Found error trace
[2019-11-23 23:39:32,863 INFO  L410         BasicCegarLoop]: trace histogram [3, 3, 3, 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]
[2019-11-23 23:39:32,863 INFO  L410      AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-11-23 23:39:32,863 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-11-23 23:39:32,864 INFO  L82        PathProgramCache]: Analyzing trace with hash 1630104179, now seen corresponding path program 1 times
[2019-11-23 23:39:32,864 INFO  L163   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2019-11-23 23:39:32,864 INFO  L348   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765426260]
[2019-11-23 23:39:32,865 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-11-23 23:39:32,944 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-23 23:39:33,305 INFO  L134       CoverageAnalysis]: Checked inductivity of 23 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked.
[2019-11-23 23:39:33,306 INFO  L348   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765426260]
[2019-11-23 23:39:33,306 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-11-23 23:39:33,306 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2019-11-23 23:39:33,307 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371519004]
[2019-11-23 23:39:33,309 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 3 states
[2019-11-23 23:39:33,311 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2019-11-23 23:39:33,312 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2019-11-23 23:39:33,312 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2019-11-23 23:39:33,312 INFO  L87              Difference]: Start difference. First operand 2277 states and 3423 transitions. Second operand 3 states.
[2019-11-23 23:39:38,935 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-11-23 23:39:38,935 INFO  L93              Difference]: Finished difference Result 5311 states and 8738 transitions.
[2019-11-23 23:39:38,936 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2019-11-23 23:39:38,936 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 775
[2019-11-23 23:39:38,936 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-11-23 23:39:38,962 INFO  L225             Difference]: With dead ends: 5311
[2019-11-23 23:39:38,963 INFO  L226             Difference]: Without dead ends: 3793
[2019-11-23 23:39:38,967 INFO  L630         BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2019-11-23 23:39:38,975 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 3793 states.
[2019-11-23 23:39:39,090 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 3793 to 3793.
[2019-11-23 23:39:39,090 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 3793 states.
[2019-11-23 23:39:39,098 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 3793 states to 3793 states and 5426 transitions.
[2019-11-23 23:39:39,098 INFO  L78                 Accepts]: Start accepts. Automaton has 3793 states and 5426 transitions. Word has length 775
[2019-11-23 23:39:39,099 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-11-23 23:39:39,099 INFO  L462      AbstractCegarLoop]: Abstraction has 3793 states and 5426 transitions.
[2019-11-23 23:39:39,099 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2019-11-23 23:39:39,100 INFO  L276                IsEmpty]: Start isEmpty. Operand 3793 states and 5426 transitions.
[2019-11-23 23:39:39,122 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 778
[2019-11-23 23:39:39,123 INFO  L402         BasicCegarLoop]: Found error trace
[2019-11-23 23:39:39,124 INFO  L410         BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-11-23 23:39:39,124 INFO  L410      AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-11-23 23:39:39,125 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-11-23 23:39:39,127 INFO  L82        PathProgramCache]: Analyzing trace with hash 219450183, now seen corresponding path program 1 times
[2019-11-23 23:39:39,127 INFO  L163   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2019-11-23 23:39:39,128 INFO  L348   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810672510]
[2019-11-23 23:39:39,129 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-11-23 23:39:39,343 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-23 23:39:40,859 INFO  L134       CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-11-23 23:39:40,859 INFO  L348   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810672510]
[2019-11-23 23:39:40,859 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-11-23 23:39:40,860 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2019-11-23 23:39:40,860 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59612408]
[2019-11-23 23:39:40,861 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 4 states
[2019-11-23 23:39:40,862 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2019-11-23 23:39:40,862 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2019-11-23 23:39:40,862 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2019-11-23 23:39:40,863 INFO  L87              Difference]: Start difference. First operand 3793 states and 5426 transitions. Second operand 4 states.
[2019-11-23 23:39:48,983 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-11-23 23:39:48,984 INFO  L93              Difference]: Finished difference Result 11375 states and 17309 transitions.
[2019-11-23 23:39:48,984 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2019-11-23 23:39:48,984 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 777
[2019-11-23 23:39:48,987 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-11-23 23:39:49,024 INFO  L225             Difference]: With dead ends: 11375
[2019-11-23 23:39:49,024 INFO  L226             Difference]: Without dead ends: 8341
[2019-11-23 23:39:49,030 INFO  L630         BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2019-11-23 23:39:49,039 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 8341 states.
[2019-11-23 23:39:49,158 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 8341 to 8341.
[2019-11-23 23:39:49,158 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 8341 states.
[2019-11-23 23:39:49,175 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 8341 states to 8341 states and 12116 transitions.
[2019-11-23 23:39:49,175 INFO  L78                 Accepts]: Start accepts. Automaton has 8341 states and 12116 transitions. Word has length 777
[2019-11-23 23:39:49,176 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-11-23 23:39:49,177 INFO  L462      AbstractCegarLoop]: Abstraction has 8341 states and 12116 transitions.
[2019-11-23 23:39:49,177 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2019-11-23 23:39:49,177 INFO  L276                IsEmpty]: Start isEmpty. Operand 8341 states and 12116 transitions.
[2019-11-23 23:39:49,207 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 822
[2019-11-23 23:39:49,207 INFO  L402         BasicCegarLoop]: Found error trace
[2019-11-23 23:39:49,209 INFO  L410         BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-11-23 23:39:49,209 INFO  L410      AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-11-23 23:39:49,209 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-11-23 23:39:49,210 INFO  L82        PathProgramCache]: Analyzing trace with hash -558418110, now seen corresponding path program 1 times
[2019-11-23 23:39:49,210 INFO  L163   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2019-11-23 23:39:49,211 INFO  L348   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713079107]
[2019-11-23 23:39:49,211 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-11-23 23:39:49,379 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-23 23:39:49,971 INFO  L134       CoverageAnalysis]: Checked inductivity of 88 backedges. 69 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked.
[2019-11-23 23:39:49,972 INFO  L348   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713079107]
[2019-11-23 23:39:49,972 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-11-23 23:39:49,973 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2019-11-23 23:39:49,973 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650755490]
[2019-11-23 23:39:49,974 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 4 states
[2019-11-23 23:39:49,974 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2019-11-23 23:39:49,974 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2019-11-23 23:39:49,975 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2019-11-23 23:39:49,975 INFO  L87              Difference]: Start difference. First operand 8341 states and 12116 transitions. Second operand 4 states.
[2019-11-23 23:39:58,207 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-11-23 23:39:58,207 INFO  L93              Difference]: Finished difference Result 31083 states and 46167 transitions.
[2019-11-23 23:39:58,207 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2019-11-23 23:39:58,207 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 821
[2019-11-23 23:39:58,208 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-11-23 23:39:58,284 INFO  L225             Difference]: With dead ends: 31083
[2019-11-23 23:39:58,284 INFO  L226             Difference]: Without dead ends: 23501
[2019-11-23 23:39:58,297 INFO  L630         BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2019-11-23 23:39:58,324 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 23501 states.
[2019-11-23 23:39:58,688 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 23501 to 23501.
[2019-11-23 23:39:58,688 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 23501 states.
[2019-11-23 23:39:58,720 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 23501 states to 23501 states and 30956 transitions.
[2019-11-23 23:39:58,720 INFO  L78                 Accepts]: Start accepts. Automaton has 23501 states and 30956 transitions. Word has length 821
[2019-11-23 23:39:58,721 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-11-23 23:39:58,721 INFO  L462      AbstractCegarLoop]: Abstraction has 23501 states and 30956 transitions.
[2019-11-23 23:39:58,721 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2019-11-23 23:39:58,721 INFO  L276                IsEmpty]: Start isEmpty. Operand 23501 states and 30956 transitions.
[2019-11-23 23:39:58,774 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 927
[2019-11-23 23:39:58,775 INFO  L402         BasicCegarLoop]: Found error trace
[2019-11-23 23:39:58,776 INFO  L410         BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-11-23 23:39:58,776 INFO  L410      AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-11-23 23:39:58,776 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-11-23 23:39:58,777 INFO  L82        PathProgramCache]: Analyzing trace with hash -1061238813, now seen corresponding path program 1 times
[2019-11-23 23:39:58,777 INFO  L163   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2019-11-23 23:39:58,777 INFO  L348   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004097272]
[2019-11-23 23:39:58,777 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-11-23 23:39:58,846 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-23 23:39:59,768 INFO  L134       CoverageAnalysis]: Checked inductivity of 333 backedges. 144 proven. 0 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked.
[2019-11-23 23:39:59,769 INFO  L348   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004097272]
[2019-11-23 23:39:59,769 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-11-23 23:39:59,770 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2019-11-23 23:39:59,770 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609345612]
[2019-11-23 23:39:59,771 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 4 states
[2019-11-23 23:39:59,772 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2019-11-23 23:39:59,772 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2019-11-23 23:39:59,772 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2019-11-23 23:39:59,773 INFO  L87              Difference]: Start difference. First operand 23501 states and 30956 transitions. Second operand 4 states.
[2019-11-23 23:40:08,586 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-11-23 23:40:08,587 INFO  L93              Difference]: Finished difference Result 86417 states and 115068 transitions.
[2019-11-23 23:40:08,590 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2019-11-23 23:40:08,590 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 926
[2019-11-23 23:40:08,590 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-11-23 23:40:08,737 INFO  L225             Difference]: With dead ends: 86417
[2019-11-23 23:40:08,738 INFO  L226             Difference]: Without dead ends: 63675
[2019-11-23 23:40:08,788 INFO  L630         BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2019-11-23 23:40:08,860 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 63675 states.
[2019-11-23 23:40:09,779 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 63675 to 59885.
[2019-11-23 23:40:09,780 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 59885 states.
[2019-11-23 23:40:09,834 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 59885 states to 59885 states and 75434 transitions.
[2019-11-23 23:40:09,834 INFO  L78                 Accepts]: Start accepts. Automaton has 59885 states and 75434 transitions. Word has length 926
[2019-11-23 23:40:09,835 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-11-23 23:40:09,835 INFO  L462      AbstractCegarLoop]: Abstraction has 59885 states and 75434 transitions.
[2019-11-23 23:40:09,835 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2019-11-23 23:40:09,835 INFO  L276                IsEmpty]: Start isEmpty. Operand 59885 states and 75434 transitions.
[2019-11-23 23:40:09,918 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 971
[2019-11-23 23:40:09,919 INFO  L402         BasicCegarLoop]: Found error trace
[2019-11-23 23:40:09,920 INFO  L410         BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-11-23 23:40:09,920 INFO  L410      AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-11-23 23:40:09,920 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-11-23 23:40:09,920 INFO  L82        PathProgramCache]: Analyzing trace with hash -1954840465, now seen corresponding path program 1 times
[2019-11-23 23:40:09,921 INFO  L163   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2019-11-23 23:40:09,921 INFO  L348   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444236640]
[2019-11-23 23:40:09,921 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-11-23 23:40:09,982 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-23 23:40:11,453 INFO  L134       CoverageAnalysis]: Checked inductivity of 390 backedges. 174 proven. 4 refuted. 0 times theorem prover too weak. 212 trivial. 0 not checked.
[2019-11-23 23:40:11,454 INFO  L348   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444236640]
[2019-11-23 23:40:11,454 INFO  L348   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717596353]
[2019-11-23 23:40:11,454 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
[2019-11-23 23:40:11,812 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-23 23:40:11,817 INFO  L255         TraceCheckSpWp]: Trace formula consists of 1214 conjuncts, 2 conjunts are in the unsatisfiable core
[2019-11-23 23:40:11,849 INFO  L278         TraceCheckSpWp]: Computing forward predicates...
[2019-11-23 23:40:12,293 INFO  L134       CoverageAnalysis]: Checked inductivity of 390 backedges. 174 proven. 0 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked.
[2019-11-23 23:40:12,293 INFO  L320         TraceCheckSpWp]: Computing backward predicates...
[2019-11-23 23:40:12,648 INFO  L134       CoverageAnalysis]: Checked inductivity of 390 backedges. 174 proven. 0 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked.
[2019-11-23 23:40:12,648 INFO  L220   FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences.
[2019-11-23 23:40:12,649 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [3] total 4
[2019-11-23 23:40:12,649 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583405320]
[2019-11-23 23:40:12,651 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 3 states
[2019-11-23 23:40:12,652 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2019-11-23 23:40:12,652 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2019-11-23 23:40:12,652 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20
[2019-11-23 23:40:12,652 INFO  L87              Difference]: Start difference. First operand 59885 states and 75434 transitions. Second operand 3 states.
[2019-11-23 23:40:17,755 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-11-23 23:40:17,756 INFO  L93              Difference]: Finished difference Result 151605 states and 191094 transitions.
[2019-11-23 23:40:17,756 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2019-11-23 23:40:17,756 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 970
[2019-11-23 23:40:17,756 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-11-23 23:40:17,929 INFO  L225             Difference]: With dead ends: 151605
[2019-11-23 23:40:17,929 INFO  L226             Difference]: Without dead ends: 92479
[2019-11-23 23:40:18,001 INFO  L630         BasicCegarLoop]: 0 DeclaredPredicates, 1942 GetRequests, 1937 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20
[2019-11-23 23:40:18,122 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 92479 states.
[2019-11-23 23:40:19,210 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 92479 to 90963.
[2019-11-23 23:40:19,214 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 90963 states.
[2019-11-23 23:40:19,366 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 90963 states to 90963 states and 107922 transitions.
[2019-11-23 23:40:19,366 INFO  L78                 Accepts]: Start accepts. Automaton has 90963 states and 107922 transitions. Word has length 970
[2019-11-23 23:40:19,367 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-11-23 23:40:19,367 INFO  L462      AbstractCegarLoop]: Abstraction has 90963 states and 107922 transitions.
[2019-11-23 23:40:19,367 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2019-11-23 23:40:19,367 INFO  L276                IsEmpty]: Start isEmpty. Operand 90963 states and 107922 transitions.
[2019-11-23 23:40:19,539 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 1253
[2019-11-23 23:40:19,539 INFO  L402         BasicCegarLoop]: Found error trace
[2019-11-23 23:40:19,542 INFO  L410         BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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]
[MP z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Abandoning pump threads because process wont die!
[2019-11-23 23:40:19,963 WARN  L499      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2019-11-23 23:40:19,964 INFO  L410      AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-11-23 23:40:19,964 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-11-23 23:40:19,964 INFO  L82        PathProgramCache]: Analyzing trace with hash -714157519, now seen corresponding path program 1 times
[2019-11-23 23:40:19,965 INFO  L163   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2019-11-23 23:40:19,965 INFO  L348   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786161211]
[2019-11-23 23:40:19,965 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-11-23 23:40:20,066 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-23 23:40:21,719 INFO  L134       CoverageAnalysis]: Checked inductivity of 669 backedges. 334 proven. 0 refuted. 0 times theorem prover too weak. 335 trivial. 0 not checked.
[2019-11-23 23:40:21,720 INFO  L348   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786161211]
[2019-11-23 23:40:21,720 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-11-23 23:40:21,720 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2019-11-23 23:40:21,721 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905908680]
[2019-11-23 23:40:21,722 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 5 states
[2019-11-23 23:40:21,722 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2019-11-23 23:40:21,723 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2019-11-23 23:40:21,723 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20
[2019-11-23 23:40:21,723 INFO  L87              Difference]: Start difference. First operand 90963 states and 107922 transitions. Second operand 5 states.