/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_label41.c


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


This is Ultimate 0.1.24-6598664
[2019-11-23 23:39:07,521 INFO  L177        SettingsManager]: Resetting all preferences to default values...
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[2019-11-23 23:39:07,553 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
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[2019-11-23 23:39:07,572 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
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[2019-11-23 23:39:07,573 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2019-11-23 23:39:07,574 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 23:39:07,591 INFO  L113        SettingsManager]: Loading preferences was successful
[2019-11-23 23:39:07,591 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2019-11-23 23:39:07,592 INFO  L136        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2019-11-23 23:39:07,593 INFO  L138        SettingsManager]:  * User list type=DISABLED
[2019-11-23 23:39:07,593 INFO  L136        SettingsManager]: Preferences of Abstract Interpretation differ from their defaults:
[2019-11-23 23:39:07,593 INFO  L138        SettingsManager]:  * Explicit value domain=true
[2019-11-23 23:39:07,593 INFO  L138        SettingsManager]:  * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain
[2019-11-23 23:39:07,593 INFO  L138        SettingsManager]:  * Octagon Domain=false
[2019-11-23 23:39:07,594 INFO  L138        SettingsManager]:  * Abstract domain=CompoundDomain
[2019-11-23 23:39:07,594 INFO  L138        SettingsManager]:  * Check feasibility of abstract posts with an SMT solver=true
[2019-11-23 23:39:07,594 INFO  L138        SettingsManager]:  * Use the RCFG-of-the-future interface=true
[2019-11-23 23:39:07,594 INFO  L138        SettingsManager]:  * Interval Domain=false
[2019-11-23 23:39:07,594 INFO  L136        SettingsManager]: Preferences of Sifa differ from their defaults:
[2019-11-23 23:39:07,595 INFO  L138        SettingsManager]:  * Call Summarizer=TopInputCallSummarizer
[2019-11-23 23:39:07,595 INFO  L138        SettingsManager]:  * Simplification Technique=SIMPLIFY_QUICK
[2019-11-23 23:39:07,596 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2019-11-23 23:39:07,596 INFO  L138        SettingsManager]:  * sizeof long=4
[2019-11-23 23:39:07,596 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2019-11-23 23:39:07,596 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2019-11-23 23:39:07,596 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2019-11-23 23:39:07,597 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2019-11-23 23:39:07,597 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2019-11-23 23:39:07,597 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2019-11-23 23:39:07,597 INFO  L138        SettingsManager]:  * sizeof long double=12
[2019-11-23 23:39:07,597 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2019-11-23 23:39:07,598 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2019-11-23 23:39:07,598 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2019-11-23 23:39:07,598 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2019-11-23 23:39:07,598 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2019-11-23 23:39:07,598 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2019-11-23 23:39:07,599 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2019-11-23 23:39:07,599 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2019-11-23 23:39:07,599 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2019-11-23 23:39:07,599 INFO  L138        SettingsManager]:  * Trace refinement strategy=SIFA_TAIPAN
[2019-11-23 23:39:07,599 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2019-11-23 23:39:07,600 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2019-11-23 23:39:07,600 INFO  L138        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2019-11-23 23:39:07,600 INFO  L138        SettingsManager]:  * Abstract interpretation Mode=USE_PREDICATES
[2019-11-23 23:39:07,874 INFO  L81    nceAwareModelManager]: Repository-Root is: /tmp
[2019-11-23 23:39:07,894 INFO  L258   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2019-11-23 23:39:07,898 INFO  L214   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2019-11-23 23:39:07,899 INFO  L271        PluginConnector]: Initializing CDTParser...
[2019-11-23 23:39:07,899 INFO  L275        PluginConnector]: CDTParser initialized
[2019-11-23 23:39:07,900 INFO  L428   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem04_label41.c
[2019-11-23 23:39:07,966 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8412268c3/c699fa8bcefb410fb3e52bceb5a24e80/FLAGbd3cce880
[2019-11-23 23:39:08,678 INFO  L306              CDTParser]: Found 1 translation units.
[2019-11-23 23:39:08,678 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem04_label41.c
[2019-11-23 23:39:08,714 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8412268c3/c699fa8bcefb410fb3e52bceb5a24e80/FLAGbd3cce880
[2019-11-23 23:39:08,799 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8412268c3/c699fa8bcefb410fb3e52bceb5a24e80
[2019-11-23 23:39:08,807 INFO  L296   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2019-11-23 23:39:08,809 INFO  L131        ToolchainWalker]: Walking toolchain with 5 elements.
[2019-11-23 23:39:08,810 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2019-11-23 23:39:08,811 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2019-11-23 23:39:08,817 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2019-11-23 23:39:08,818 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 11:39:08" (1/1) ...
[2019-11-23 23:39:08,821 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@50e21359 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 23:39:08,821 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 11:39:08" (1/1) ...
[2019-11-23 23:39:08,830 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2019-11-23 23:39:08,994 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2019-11-23 23:39:10,616 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2019-11-23 23:39:10,624 INFO  L203         MainTranslator]: Completed pre-run
[2019-11-23 23:39:11,265 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2019-11-23 23:39:11,297 INFO  L208         MainTranslator]: Completed translation
[2019-11-23 23:39:11,297 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:39:11 WrapperNode
[2019-11-23 23:39:11,297 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2019-11-23 23:39:11,299 INFO  L113        PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2019-11-23 23:39:11,299 INFO  L271        PluginConnector]: Initializing Boogie Procedure Inliner...
[2019-11-23 23:39:11,299 INFO  L275        PluginConnector]: Boogie Procedure Inliner initialized
[2019-11-23 23:39:11,308 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 23:39:11,382 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 23:39:11,552 INFO  L132        PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2019-11-23 23:39:11,553 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2019-11-23 23:39:11,553 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2019-11-23 23:39:11,553 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2019-11-23 23:39:11,564 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 23:39:11,564 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 23:39:11,582 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 23:39:11,582 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 23:39:11,655 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 23:39:11,692 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 23:39:11,712 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 23:39:11,733 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2019-11-23 23:39:11,734 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2019-11-23 23:39:11,735 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2019-11-23 23:39:11,735 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2019-11-23 23:39:11,736 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 23:39:11,793 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2019-11-23 23:39:11,793 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2019-11-23 23:39:17,334 INFO  L279             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2019-11-23 23:39:17,334 INFO  L284             CfgBuilder]: Removed 13 assume(true) statements.
[2019-11-23 23:39:17,336 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 11:39:17 BoogieIcfgContainer
[2019-11-23 23:39:17,336 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2019-11-23 23:39:17,338 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2019-11-23 23:39:17,339 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2019-11-23 23:39:17,342 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2019-11-23 23:39:17,342 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 11:39:08" (1/3) ...
[2019-11-23 23:39:17,343 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52b4c88e 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 23:39:17,344 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 23:39:17,344 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52b4c88e 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 23:39:17,345 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 23:39:17,347 INFO  L109   eAbstractionObserver]: Analyzing ICFG Problem04_label41.c
[2019-11-23 23:39:17,357 INFO  L153   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2019-11-23 23:39:17,367 INFO  L165   ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2019-11-23 23:39:17,380 INFO  L249      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2019-11-23 23:39:17,443 INFO  L373      AbstractCegarLoop]: Interprodecural is true
[2019-11-23 23:39:17,444 INFO  L374      AbstractCegarLoop]: Hoare is true
[2019-11-23 23:39:17,444 INFO  L375      AbstractCegarLoop]: Compute interpolants for FPandBP
[2019-11-23 23:39:17,444 INFO  L376      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2019-11-23 23:39:17,444 INFO  L377      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2019-11-23 23:39:17,444 INFO  L378      AbstractCegarLoop]: Difference is false
[2019-11-23 23:39:17,445 INFO  L379      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2019-11-23 23:39:17,445 INFO  L383      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2019-11-23 23:39:17,492 INFO  L276                IsEmpty]: Start isEmpty. Operand 763 states.
[2019-11-23 23:39:17,556 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 756
[2019-11-23 23:39:17,556 INFO  L402         BasicCegarLoop]: Found error trace
[2019-11-23 23:39:17,559 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 23:39:17,567 INFO  L410      AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-11-23 23:39:17,574 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-11-23 23:39:17,574 INFO  L82        PathProgramCache]: Analyzing trace with hash -1512458372, now seen corresponding path program 1 times
[2019-11-23 23:39:17,585 INFO  L163   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2019-11-23 23:39:17,586 INFO  L348   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875139840]
[2019-11-23 23:39:17,587 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-11-23 23:39:18,108 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-23 23:39:22,245 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 23:39:22,246 INFO  L348   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875139840]
[2019-11-23 23:39:22,246 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-11-23 23:39:22,247 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2019-11-23 23:39:22,248 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168077510]
[2019-11-23 23:39:22,255 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 5 states
[2019-11-23 23:39:22,256 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2019-11-23 23:39:22,271 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2019-11-23 23:39:22,272 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20
[2019-11-23 23:39:22,274 INFO  L87              Difference]: Start difference. First operand 763 states. Second operand 5 states.
[2019-11-23 23:39:29,873 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-11-23 23:39:29,873 INFO  L93              Difference]: Finished difference Result 3049 states and 6058 transitions.
[2019-11-23 23:39:29,874 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2019-11-23 23:39:29,876 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 755
[2019-11-23 23:39:29,885 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-11-23 23:39:29,930 INFO  L225             Difference]: With dead ends: 3049
[2019-11-23 23:39:29,930 INFO  L226             Difference]: Without dead ends: 2279
[2019-11-23 23:39:29,945 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 23:39:29,982 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 2279 states.
[2019-11-23 23:39:30,144 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 2279 to 2277.
[2019-11-23 23:39:30,146 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 2277 states.
[2019-11-23 23:39:30,158 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 2277 states to 2277 states and 3393 transitions.
[2019-11-23 23:39:30,162 INFO  L78                 Accepts]: Start accepts. Automaton has 2277 states and 3393 transitions. Word has length 755
[2019-11-23 23:39:30,167 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-11-23 23:39:30,167 INFO  L462      AbstractCegarLoop]: Abstraction has 2277 states and 3393 transitions.
[2019-11-23 23:39:30,167 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2019-11-23 23:39:30,168 INFO  L276                IsEmpty]: Start isEmpty. Operand 2277 states and 3393 transitions.
[2019-11-23 23:39:30,218 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 776
[2019-11-23 23:39:30,219 INFO  L402         BasicCegarLoop]: Found error trace
[2019-11-23 23:39:30,220 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 23:39:30,221 INFO  L410      AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-11-23 23:39:30,221 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-11-23 23:39:30,222 INFO  L82        PathProgramCache]: Analyzing trace with hash -1065242251, now seen corresponding path program 1 times
[2019-11-23 23:39:30,222 INFO  L163   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2019-11-23 23:39:30,223 INFO  L348   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900859524]
[2019-11-23 23:39:30,223 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-11-23 23:39:30,348 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-23 23:39:30,857 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 23:39:30,857 INFO  L348   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900859524]
[2019-11-23 23:39:30,858 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-11-23 23:39:30,858 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2019-11-23 23:39:30,858 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531328478]
[2019-11-23 23:39:30,862 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 3 states
[2019-11-23 23:39:30,864 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2019-11-23 23:39:30,865 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2019-11-23 23:39:30,865 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2019-11-23 23:39:30,865 INFO  L87              Difference]: Start difference. First operand 2277 states and 3393 transitions. Second operand 3 states.
[2019-11-23 23:39:34,874 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-11-23 23:39:34,874 INFO  L93              Difference]: Finished difference Result 5311 states and 8648 transitions.
[2019-11-23 23:39:34,874 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2019-11-23 23:39:34,875 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 775
[2019-11-23 23:39:34,875 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-11-23 23:39:34,893 INFO  L225             Difference]: With dead ends: 5311
[2019-11-23 23:39:34,893 INFO  L226             Difference]: Without dead ends: 3793
[2019-11-23 23:39:34,897 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 23:39:34,902 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 3793 states.
[2019-11-23 23:39:34,984 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 3793 to 3793.
[2019-11-23 23:39:34,984 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 3793 states.
[2019-11-23 23:39:34,992 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 3793 states to 3793 states and 5354 transitions.
[2019-11-23 23:39:34,993 INFO  L78                 Accepts]: Start accepts. Automaton has 3793 states and 5354 transitions. Word has length 775
[2019-11-23 23:39:34,994 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-11-23 23:39:34,994 INFO  L462      AbstractCegarLoop]: Abstraction has 3793 states and 5354 transitions.
[2019-11-23 23:39:34,994 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2019-11-23 23:39:34,994 INFO  L276                IsEmpty]: Start isEmpty. Operand 3793 states and 5354 transitions.
[2019-11-23 23:39:35,023 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 778
[2019-11-23 23:39:35,024 INFO  L402         BasicCegarLoop]: Found error trace
[2019-11-23 23:39:35,024 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 23:39:35,025 INFO  L410      AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-11-23 23:39:35,026 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-11-23 23:39:35,026 INFO  L82        PathProgramCache]: Analyzing trace with hash -151609719, now seen corresponding path program 1 times
[2019-11-23 23:39:35,026 INFO  L163   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2019-11-23 23:39:35,027 INFO  L348   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654977883]
[2019-11-23 23:39:35,028 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-11-23 23:39:35,185 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-23 23:39:36,668 INFO  L134       CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked.
[2019-11-23 23:39:36,669 INFO  L348   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654977883]
[2019-11-23 23:39:36,669 INFO  L348   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064952192]
[2019-11-23 23:39:36,670 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 23:39:36,963 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-23 23:39:36,968 INFO  L255         TraceCheckSpWp]: Trace formula consists of 942 conjuncts, 2 conjunts are in the unsatisfiable core
[2019-11-23 23:39:37,013 INFO  L278         TraceCheckSpWp]: Computing forward predicates...
[2019-11-23 23:39:37,616 INFO  L134       CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked.
[2019-11-23 23:39:37,616 INFO  L320         TraceCheckSpWp]: Computing backward predicates...
[2019-11-23 23:39:38,084 INFO  L134       CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked.
[2019-11-23 23:39:38,085 INFO  L220   FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences.
[2019-11-23 23:39:38,085 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [3] total 4
[2019-11-23 23:39:38,085 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825104315]
[2019-11-23 23:39:38,087 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 3 states
[2019-11-23 23:39:38,087 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2019-11-23 23:39:38,088 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2019-11-23 23:39:38,088 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20
[2019-11-23 23:39:38,088 INFO  L87              Difference]: Start difference. First operand 3793 states and 5354 transitions. Second operand 3 states.
[2019-11-23 23:39:42,197 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-11-23 23:39:42,198 INFO  L93              Difference]: Finished difference Result 9859 states and 14531 transitions.
[2019-11-23 23:39:42,198 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2019-11-23 23:39:42,198 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 777
[2019-11-23 23:39:42,200 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-11-23 23:39:42,233 INFO  L225             Difference]: With dead ends: 9859
[2019-11-23 23:39:42,233 INFO  L226             Difference]: Without dead ends: 6825
[2019-11-23 23:39:42,239 INFO  L630         BasicCegarLoop]: 0 DeclaredPredicates, 1556 GetRequests, 1551 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20
[2019-11-23 23:39:42,247 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 6825 states.
[2019-11-23 23:39:42,370 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 6825 to 6067.
[2019-11-23 23:39:42,370 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 6067 states.
[2019-11-23 23:39:42,381 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6067 states to 6067 states and 8792 transitions.
[2019-11-23 23:39:42,381 INFO  L78                 Accepts]: Start accepts. Automaton has 6067 states and 8792 transitions. Word has length 777
[2019-11-23 23:39:42,382 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-11-23 23:39:42,383 INFO  L462      AbstractCegarLoop]: Abstraction has 6067 states and 8792 transitions.
[2019-11-23 23:39:42,383 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2019-11-23 23:39:42,383 INFO  L276                IsEmpty]: Start isEmpty. Operand 6067 states and 8792 transitions.
[2019-11-23 23:39:42,406 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 833
[2019-11-23 23:39:42,406 INFO  L402         BasicCegarLoop]: Found error trace
[2019-11-23 23:39:42,407 INFO  L410         BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 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, 1]
[2019-11-23 23:39:42,610 WARN  L499      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2019-11-23 23:39:42,611 INFO  L410      AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-11-23 23:39:42,611 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-11-23 23:39:42,612 INFO  L82        PathProgramCache]: Analyzing trace with hash -1551777763, now seen corresponding path program 1 times
[2019-11-23 23:39:42,612 INFO  L163   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2019-11-23 23:39:42,613 INFO  L348   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68921481]
[2019-11-23 23:39:42,613 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-11-23 23:39:42,700 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-23 23:39:43,516 INFO  L134       CoverageAnalysis]: Checked inductivity of 125 backedges. 90 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked.
[2019-11-23 23:39:43,517 INFO  L348   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68921481]
[2019-11-23 23:39:43,517 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-11-23 23:39:43,518 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2019-11-23 23:39:43,518 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251986989]
[2019-11-23 23:39:43,519 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 4 states
[2019-11-23 23:39:43,519 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2019-11-23 23:39:43,519 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2019-11-23 23:39:43,520 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2019-11-23 23:39:43,520 INFO  L87              Difference]: Start difference. First operand 6067 states and 8792 transitions. Second operand 4 states.
[2019-11-23 23:39:50,005 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-11-23 23:39:50,005 INFO  L93              Difference]: Finished difference Result 15165 states and 22073 transitions.
[2019-11-23 23:39:50,013 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2019-11-23 23:39:50,013 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 832
[2019-11-23 23:39:50,013 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-11-23 23:39:50,059 INFO  L225             Difference]: With dead ends: 15165
[2019-11-23 23:39:50,059 INFO  L226             Difference]: Without dead ends: 9857
[2019-11-23 23:39:50,070 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 23:39:50,082 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 9857 states.
[2019-11-23 23:39:50,237 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 9857 to 9857.
[2019-11-23 23:39:50,238 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 9857 states.
[2019-11-23 23:39:50,258 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 9857 states to 9857 states and 12666 transitions.
[2019-11-23 23:39:50,259 INFO  L78                 Accepts]: Start accepts. Automaton has 9857 states and 12666 transitions. Word has length 832
[2019-11-23 23:39:50,259 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-11-23 23:39:50,260 INFO  L462      AbstractCegarLoop]: Abstraction has 9857 states and 12666 transitions.
[2019-11-23 23:39:50,260 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2019-11-23 23:39:50,260 INFO  L276                IsEmpty]: Start isEmpty. Operand 9857 states and 12666 transitions.
[2019-11-23 23:39:50,289 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 867
[2019-11-23 23:39:50,289 INFO  L402         BasicCegarLoop]: Found error trace
[2019-11-23 23:39:50,292 INFO  L410         BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 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]
[2019-11-23 23:39:50,292 INFO  L410      AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-11-23 23:39:50,293 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-11-23 23:39:50,293 INFO  L82        PathProgramCache]: Analyzing trace with hash -1958374638, now seen corresponding path program 1 times
[2019-11-23 23:39:50,294 INFO  L163   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2019-11-23 23:39:50,295 INFO  L348   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285649001]
[2019-11-23 23:39:50,296 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-11-23 23:39:50,386 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-23 23:39:51,001 INFO  L134       CoverageAnalysis]: Checked inductivity of 230 backedges. 126 proven. 3 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked.
[2019-11-23 23:39:51,001 INFO  L348   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285649001]
[2019-11-23 23:39:51,003 INFO  L348   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387311698]
[2019-11-23 23:39:51,004 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
[2019-11-23 23:39:51,397 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-23 23:39:51,401 INFO  L255         TraceCheckSpWp]: Trace formula consists of 1167 conjuncts, 2 conjunts are in the unsatisfiable core
[2019-11-23 23:39:51,416 INFO  L278         TraceCheckSpWp]: Computing forward predicates...
[2019-11-23 23:39:51,811 INFO  L134       CoverageAnalysis]: Checked inductivity of 230 backedges. 126 proven. 0 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked.
[2019-11-23 23:39:51,811 INFO  L320         TraceCheckSpWp]: Computing backward predicates...
[2019-11-23 23:39:52,166 INFO  L134       CoverageAnalysis]: Checked inductivity of 230 backedges. 126 proven. 0 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked.
[2019-11-23 23:39:52,167 INFO  L220   FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences.
[2019-11-23 23:39:52,167 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [3] total 4
[2019-11-23 23:39:52,167 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43252539]
[2019-11-23 23:39:52,169 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 3 states
[2019-11-23 23:39:52,169 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2019-11-23 23:39:52,169 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2019-11-23 23:39:52,170 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20
[2019-11-23 23:39:52,170 INFO  L87              Difference]: Start difference. First operand 9857 states and 12666 transitions. Second operand 3 states.
[2019-11-23 23:39:56,422 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-11-23 23:39:56,422 INFO  L93              Difference]: Finished difference Result 28051 states and 36467 transitions.
[2019-11-23 23:39:56,422 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2019-11-23 23:39:56,423 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 866
[2019-11-23 23:39:56,423 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-11-23 23:39:56,484 INFO  L225             Difference]: With dead ends: 28051
[2019-11-23 23:39:56,484 INFO  L226             Difference]: Without dead ends: 18953
[2019-11-23 23:39:56,493 INFO  L630         BasicCegarLoop]: 0 DeclaredPredicates, 1734 GetRequests, 1729 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 23:39:56,512 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 18953 states.
[2019-11-23 23:39:56,753 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 18953 to 18953.
[2019-11-23 23:39:56,753 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 18953 states.
[2019-11-23 23:39:56,777 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 18953 states to 18953 states and 23828 transitions.
[2019-11-23 23:39:56,778 INFO  L78                 Accepts]: Start accepts. Automaton has 18953 states and 23828 transitions. Word has length 866
[2019-11-23 23:39:56,778 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-11-23 23:39:56,778 INFO  L462      AbstractCegarLoop]: Abstraction has 18953 states and 23828 transitions.
[2019-11-23 23:39:56,778 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2019-11-23 23:39:56,778 INFO  L276                IsEmpty]: Start isEmpty. Operand 18953 states and 23828 transitions.
[2019-11-23 23:39:56,809 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 885
[2019-11-23 23:39:56,809 INFO  L402         BasicCegarLoop]: Found error trace
[2019-11-23 23:39:56,810 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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]
[2019-11-23 23:39:57,014 WARN  L499      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2019-11-23 23:39:57,014 INFO  L410      AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-11-23 23:39:57,014 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-11-23 23:39:57,015 INFO  L82        PathProgramCache]: Analyzing trace with hash 1215921930, now seen corresponding path program 1 times
[2019-11-23 23:39:57,015 INFO  L163   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2019-11-23 23:39:57,015 INFO  L348   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401950266]
[2019-11-23 23:39:57,015 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-11-23 23:39:57,077 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-23 23:39:57,565 INFO  L134       CoverageAnalysis]: Checked inductivity of 262 backedges. 154 proven. 0 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked.
[2019-11-23 23:39:57,565 INFO  L348   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401950266]
[2019-11-23 23:39:57,565 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-11-23 23:39:57,566 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2019-11-23 23:39:57,566 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712936332]
[2019-11-23 23:39:57,568 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 4 states
[2019-11-23 23:39:57,568 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2019-11-23 23:39:57,568 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2019-11-23 23:39:57,568 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2019-11-23 23:39:57,569 INFO  L87              Difference]: Start difference. First operand 18953 states and 23828 transitions. Second operand 4 states.
[2019-11-23 23:40:03,683 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-11-23 23:40:03,684 INFO  L93              Difference]: Finished difference Result 62919 states and 80117 transitions.
[2019-11-23 23:40:03,684 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2019-11-23 23:40:03,684 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 884
[2019-11-23 23:40:03,684 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-11-23 23:40:03,760 INFO  L225             Difference]: With dead ends: 62919
[2019-11-23 23:40:03,760 INFO  L226             Difference]: Without dead ends: 44725
[2019-11-23 23:40:03,795 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 23:40:03,838 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 44725 states.
[2019-11-23 23:40:04,362 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 44725 to 43209.
[2019-11-23 23:40:04,363 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 43209 states.
[2019-11-23 23:40:04,430 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 43209 states to 43209 states and 52072 transitions.
[2019-11-23 23:40:04,430 INFO  L78                 Accepts]: Start accepts. Automaton has 43209 states and 52072 transitions. Word has length 884
[2019-11-23 23:40:04,430 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-11-23 23:40:04,431 INFO  L462      AbstractCegarLoop]: Abstraction has 43209 states and 52072 transitions.
[2019-11-23 23:40:04,431 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2019-11-23 23:40:04,431 INFO  L276                IsEmpty]: Start isEmpty. Operand 43209 states and 52072 transitions.
[2019-11-23 23:40:04,646 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 1115
[2019-11-23 23:40:04,646 INFO  L402         BasicCegarLoop]: Found error trace
[2019-11-23 23:40:04,647 INFO  L410         BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 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, 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, 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]
[2019-11-23 23:40:04,647 INFO  L410      AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-11-23 23:40:04,648 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-11-23 23:40:04,648 INFO  L82        PathProgramCache]: Analyzing trace with hash -213993404, now seen corresponding path program 1 times
[2019-11-23 23:40:04,648 INFO  L163   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2019-11-23 23:40:04,649 INFO  L348   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032158963]
[2019-11-23 23:40:04,649 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-11-23 23:40:04,717 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-23 23:40:05,652 INFO  L134       CoverageAnalysis]: Checked inductivity of 695 backedges. 414 proven. 0 refuted. 0 times theorem prover too weak. 281 trivial. 0 not checked.
[2019-11-23 23:40:05,652 INFO  L348   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032158963]
[2019-11-23 23:40:05,652 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-11-23 23:40:05,653 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2019-11-23 23:40:05,653 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346881360]
[2019-11-23 23:40:05,654 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 5 states
[2019-11-23 23:40:05,654 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2019-11-23 23:40:05,654 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2019-11-23 23:40:05,655 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20
[2019-11-23 23:40:05,655 INFO  L87              Difference]: Start difference. First operand 43209 states and 52072 transitions. Second operand 5 states.
[2019-11-23 23:40:13,925 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-11-23 23:40:13,925 INFO  L93              Difference]: Finished difference Result 103851 states and 124983 transitions.
[2019-11-23 23:40:13,926 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2019-11-23 23:40:13,926 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 1114
[2019-11-23 23:40:13,927 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-11-23 23:40:14,001 INFO  L225             Difference]: With dead ends: 103851
[2019-11-23 23:40:14,001 INFO  L226             Difference]: Without dead ends: 61401
[2019-11-23 23:40:14,037 INFO  L630         BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 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 23:40:14,092 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 61401 states.
[2019-11-23 23:40:14,841 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 61401 to 57611.
[2019-11-23 23:40:14,841 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 57611 states.
[2019-11-23 23:40:14,914 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 57611 states to 57611 states and 67214 transitions.
[2019-11-23 23:40:14,914 INFO  L78                 Accepts]: Start accepts. Automaton has 57611 states and 67214 transitions. Word has length 1114
[2019-11-23 23:40:14,915 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-11-23 23:40:14,915 INFO  L462      AbstractCegarLoop]: Abstraction has 57611 states and 67214 transitions.
[2019-11-23 23:40:14,915 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2019-11-23 23:40:14,915 INFO  L276                IsEmpty]: Start isEmpty. Operand 57611 states and 67214 transitions.
[2019-11-23 23:40:14,959 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 1184
[2019-11-23 23:40:14,959 INFO  L402         BasicCegarLoop]: Found error trace
[2019-11-23 23:40:14,960 INFO  L410         BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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]
[2019-11-23 23:40:14,961 INFO  L410      AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-11-23 23:40:14,961 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-11-23 23:40:14,961 INFO  L82        PathProgramCache]: Analyzing trace with hash -471017179, now seen corresponding path program 1 times
[2019-11-23 23:40:14,962 INFO  L163   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2019-11-23 23:40:14,962 INFO  L348   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765033548]
[2019-11-23 23:40:14,962 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-11-23 23:40:15,047 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-23 23:40:17,066 INFO  L134       CoverageAnalysis]: Checked inductivity of 946 backedges. 346 proven. 0 refuted. 0 times theorem prover too weak. 600 trivial. 0 not checked.
[2019-11-23 23:40:17,066 INFO  L348   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765033548]
[2019-11-23 23:40:17,066 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-11-23 23:40:17,067 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2019-11-23 23:40:17,067 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368897874]
[2019-11-23 23:40:17,068 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 4 states
[2019-11-23 23:40:17,068 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2019-11-23 23:40:17,068 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2019-11-23 23:40:17,068 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2019-11-23 23:40:17,069 INFO  L87              Difference]: Start difference. First operand 57611 states and 67214 transitions. Second operand 4 states.