/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_label28.c


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


This is Ultimate 0.1.24-6598664
[2019-11-23 23:38:22,842 INFO  L177        SettingsManager]: Resetting all preferences to default values...
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[2019-11-23 23:38:22,894 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
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[2019-11-23 23:38:22,896 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2019-11-23 23:38:22,897 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 23:38:22,912 INFO  L113        SettingsManager]: Loading preferences was successful
[2019-11-23 23:38:22,912 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2019-11-23 23:38:22,913 INFO  L136        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2019-11-23 23:38:22,913 INFO  L138        SettingsManager]:  * User list type=DISABLED
[2019-11-23 23:38:22,914 INFO  L136        SettingsManager]: Preferences of Abstract Interpretation differ from their defaults:
[2019-11-23 23:38:22,914 INFO  L138        SettingsManager]:  * Explicit value domain=true
[2019-11-23 23:38:22,914 INFO  L138        SettingsManager]:  * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain
[2019-11-23 23:38:22,914 INFO  L138        SettingsManager]:  * Octagon Domain=false
[2019-11-23 23:38:22,914 INFO  L138        SettingsManager]:  * Abstract domain=CompoundDomain
[2019-11-23 23:38:22,915 INFO  L138        SettingsManager]:  * Check feasibility of abstract posts with an SMT solver=true
[2019-11-23 23:38:22,915 INFO  L138        SettingsManager]:  * Use the RCFG-of-the-future interface=true
[2019-11-23 23:38:22,915 INFO  L138        SettingsManager]:  * Interval Domain=false
[2019-11-23 23:38:22,915 INFO  L136        SettingsManager]: Preferences of Sifa differ from their defaults:
[2019-11-23 23:38:22,915 INFO  L138        SettingsManager]:  * Call Summarizer=TopInputCallSummarizer
[2019-11-23 23:38:22,916 INFO  L138        SettingsManager]:  * Simplification Technique=SIMPLIFY_QUICK
[2019-11-23 23:38:22,916 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2019-11-23 23:38:22,916 INFO  L138        SettingsManager]:  * sizeof long=4
[2019-11-23 23:38:22,917 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2019-11-23 23:38:22,917 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2019-11-23 23:38:22,917 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2019-11-23 23:38:22,917 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2019-11-23 23:38:22,917 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2019-11-23 23:38:22,918 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2019-11-23 23:38:22,918 INFO  L138        SettingsManager]:  * sizeof long double=12
[2019-11-23 23:38:22,918 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2019-11-23 23:38:22,918 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2019-11-23 23:38:22,918 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2019-11-23 23:38:22,919 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2019-11-23 23:38:22,919 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2019-11-23 23:38:22,919 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2019-11-23 23:38:22,919 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2019-11-23 23:38:22,919 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2019-11-23 23:38:22,920 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2019-11-23 23:38:22,920 INFO  L138        SettingsManager]:  * Trace refinement strategy=SIFA_TAIPAN
[2019-11-23 23:38:22,920 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2019-11-23 23:38:22,920 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2019-11-23 23:38:22,920 INFO  L138        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2019-11-23 23:38:22,921 INFO  L138        SettingsManager]:  * Abstract interpretation Mode=USE_PREDICATES
[2019-11-23 23:38:23,206 INFO  L81    nceAwareModelManager]: Repository-Root is: /tmp
[2019-11-23 23:38:23,223 INFO  L258   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2019-11-23 23:38:23,226 INFO  L214   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2019-11-23 23:38:23,228 INFO  L271        PluginConnector]: Initializing CDTParser...
[2019-11-23 23:38:23,228 INFO  L275        PluginConnector]: CDTParser initialized
[2019-11-23 23:38:23,229 INFO  L428   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem04_label28.c
[2019-11-23 23:38:23,304 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2d6645b98/ea958398c6f1483d839c111497dea3a3/FLAG79e184a06
[2019-11-23 23:38:24,087 INFO  L306              CDTParser]: Found 1 translation units.
[2019-11-23 23:38:24,088 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem04_label28.c
[2019-11-23 23:38:24,130 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2d6645b98/ea958398c6f1483d839c111497dea3a3/FLAG79e184a06
[2019-11-23 23:38:24,161 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2d6645b98/ea958398c6f1483d839c111497dea3a3
[2019-11-23 23:38:24,173 INFO  L296   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2019-11-23 23:38:24,176 INFO  L131        ToolchainWalker]: Walking toolchain with 5 elements.
[2019-11-23 23:38:24,181 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2019-11-23 23:38:24,181 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2019-11-23 23:38:24,185 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2019-11-23 23:38:24,186 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 11:38:24" (1/1) ...
[2019-11-23 23:38:24,189 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1cd6405c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:38:24, skipping insertion in model container
[2019-11-23 23:38:24,189 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 11:38:24" (1/1) ...
[2019-11-23 23:38:24,198 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2019-11-23 23:38:24,347 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2019-11-23 23:38:25,945 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2019-11-23 23:38:25,954 INFO  L203         MainTranslator]: Completed pre-run
[2019-11-23 23:38:26,729 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2019-11-23 23:38:26,770 INFO  L208         MainTranslator]: Completed translation
[2019-11-23 23:38:26,771 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:38:26 WrapperNode
[2019-11-23 23:38:26,771 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2019-11-23 23:38:26,772 INFO  L113        PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2019-11-23 23:38:26,772 INFO  L271        PluginConnector]: Initializing Boogie Procedure Inliner...
[2019-11-23 23:38:26,772 INFO  L275        PluginConnector]: Boogie Procedure Inliner initialized
[2019-11-23 23:38:26,781 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:38:26" (1/1) ...
[2019-11-23 23:38:26,836 INFO  L185        PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:38:26" (1/1) ...
[2019-11-23 23:38:27,001 INFO  L132        PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2019-11-23 23:38:27,002 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2019-11-23 23:38:27,002 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2019-11-23 23:38:27,002 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2019-11-23 23:38:27,012 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:38:26" (1/1) ...
[2019-11-23 23:38:27,013 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:38:26" (1/1) ...
[2019-11-23 23:38:27,031 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:38:26" (1/1) ...
[2019-11-23 23:38:27,032 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:38:26" (1/1) ...
[2019-11-23 23:38:27,132 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:38:26" (1/1) ...
[2019-11-23 23:38:27,161 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:38:26" (1/1) ...
[2019-11-23 23:38:27,184 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:38:26" (1/1) ...
[2019-11-23 23:38:27,206 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2019-11-23 23:38:27,207 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2019-11-23 23:38:27,207 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2019-11-23 23:38:27,207 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2019-11-23 23:38:27,208 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:38:26" (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 23:38:27,277 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2019-11-23 23:38:27,277 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2019-11-23 23:38:33,056 INFO  L279             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2019-11-23 23:38:33,057 INFO  L284             CfgBuilder]: Removed 13 assume(true) statements.
[2019-11-23 23:38:33,058 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 11:38:33 BoogieIcfgContainer
[2019-11-23 23:38:33,058 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2019-11-23 23:38:33,059 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2019-11-23 23:38:33,060 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2019-11-23 23:38:33,065 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2019-11-23 23:38:33,065 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 11:38:24" (1/3) ...
[2019-11-23 23:38:33,067 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e81dac6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 11:38:33, skipping insertion in model container
[2019-11-23 23:38:33,067 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:38:26" (2/3) ...
[2019-11-23 23:38:33,068 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e81dac6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 11:38:33, skipping insertion in model container
[2019-11-23 23:38:33,069 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 11:38:33" (3/3) ...
[2019-11-23 23:38:33,070 INFO  L109   eAbstractionObserver]: Analyzing ICFG Problem04_label28.c
[2019-11-23 23:38:33,079 INFO  L153   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2019-11-23 23:38:33,089 INFO  L165   ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2019-11-23 23:38:33,100 INFO  L249      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2019-11-23 23:38:33,143 INFO  L373      AbstractCegarLoop]: Interprodecural is true
[2019-11-23 23:38:33,143 INFO  L374      AbstractCegarLoop]: Hoare is true
[2019-11-23 23:38:33,143 INFO  L375      AbstractCegarLoop]: Compute interpolants for FPandBP
[2019-11-23 23:38:33,143 INFO  L376      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2019-11-23 23:38:33,144 INFO  L377      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2019-11-23 23:38:33,144 INFO  L378      AbstractCegarLoop]: Difference is false
[2019-11-23 23:38:33,144 INFO  L379      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2019-11-23 23:38:33,144 INFO  L383      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2019-11-23 23:38:33,178 INFO  L276                IsEmpty]: Start isEmpty. Operand 763 states.
[2019-11-23 23:38:33,217 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 756
[2019-11-23 23:38:33,218 INFO  L402         BasicCegarLoop]: Found error trace
[2019-11-23 23:38:33,220 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 23:38:33,220 INFO  L410      AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-11-23 23:38:33,226 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-11-23 23:38:33,226 INFO  L82        PathProgramCache]: Analyzing trace with hash -1870336262, now seen corresponding path program 1 times
[2019-11-23 23:38:33,265 INFO  L163   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2019-11-23 23:38:33,265 INFO  L348   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852210595]
[2019-11-23 23:38:33,268 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-11-23 23:38:33,667 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-23 23:38:34,873 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 23:38:34,874 INFO  L348   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852210595]
[2019-11-23 23:38:34,875 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-11-23 23:38:34,875 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2019-11-23 23:38:34,877 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473848640]
[2019-11-23 23:38:34,884 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 3 states
[2019-11-23 23:38:34,884 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2019-11-23 23:38:34,894 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2019-11-23 23:38:34,895 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2019-11-23 23:38:34,896 INFO  L87              Difference]: Start difference. First operand 763 states. Second operand 3 states.
[2019-11-23 23:38:39,302 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-11-23 23:38:39,302 INFO  L93              Difference]: Finished difference Result 2285 states and 4541 transitions.
[2019-11-23 23:38:39,308 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2019-11-23 23:38:39,309 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 755
[2019-11-23 23:38:39,314 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-11-23 23:38:39,346 INFO  L225             Difference]: With dead ends: 2285
[2019-11-23 23:38:39,346 INFO  L226             Difference]: Without dead ends: 1519
[2019-11-23 23:38:39,354 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 23:38:39,375 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 1519 states.
[2019-11-23 23:38:39,472 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 1519 to 1519.
[2019-11-23 23:38:39,474 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 1519 states.
[2019-11-23 23:38:39,479 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 1519 states to 1519 states and 2797 transitions.
[2019-11-23 23:38:39,481 INFO  L78                 Accepts]: Start accepts. Automaton has 1519 states and 2797 transitions. Word has length 755
[2019-11-23 23:38:39,483 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-11-23 23:38:39,483 INFO  L462      AbstractCegarLoop]: Abstraction has 1519 states and 2797 transitions.
[2019-11-23 23:38:39,484 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2019-11-23 23:38:39,484 INFO  L276                IsEmpty]: Start isEmpty. Operand 1519 states and 2797 transitions.
[2019-11-23 23:38:39,504 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 761
[2019-11-23 23:38:39,505 INFO  L402         BasicCegarLoop]: Found error trace
[2019-11-23 23:38:39,505 INFO  L410         BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-11-23 23:38:39,506 INFO  L410      AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-11-23 23:38:39,506 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-11-23 23:38:39,507 INFO  L82        PathProgramCache]: Analyzing trace with hash 111518672, now seen corresponding path program 1 times
[2019-11-23 23:38:39,507 INFO  L163   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2019-11-23 23:38:39,507 INFO  L348   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966610013]
[2019-11-23 23:38:39,507 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-11-23 23:38:39,568 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-23 23:38:40,035 INFO  L134       CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-11-23 23:38:40,035 INFO  L348   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966610013]
[2019-11-23 23:38:40,036 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-11-23 23:38:40,036 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2019-11-23 23:38:40,036 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777304130]
[2019-11-23 23:38:40,045 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 3 states
[2019-11-23 23:38:40,045 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2019-11-23 23:38:40,046 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2019-11-23 23:38:40,046 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2019-11-23 23:38:40,046 INFO  L87              Difference]: Start difference. First operand 1519 states and 2797 transitions. Second operand 3 states.
[2019-11-23 23:38:44,264 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-11-23 23:38:44,265 INFO  L93              Difference]: Finished difference Result 4553 states and 8388 transitions.
[2019-11-23 23:38:44,265 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2019-11-23 23:38:44,266 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 760
[2019-11-23 23:38:44,266 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-11-23 23:38:44,284 INFO  L225             Difference]: With dead ends: 4553
[2019-11-23 23:38:44,284 INFO  L226             Difference]: Without dead ends: 3035
[2019-11-23 23:38:44,288 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 23:38:44,293 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 3035 states.
[2019-11-23 23:38:44,358 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 3035 to 3035.
[2019-11-23 23:38:44,359 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 3035 states.
[2019-11-23 23:38:44,365 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 3035 states to 3035 states and 4836 transitions.
[2019-11-23 23:38:44,366 INFO  L78                 Accepts]: Start accepts. Automaton has 3035 states and 4836 transitions. Word has length 760
[2019-11-23 23:38:44,366 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-11-23 23:38:44,366 INFO  L462      AbstractCegarLoop]: Abstraction has 3035 states and 4836 transitions.
[2019-11-23 23:38:44,367 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2019-11-23 23:38:44,367 INFO  L276                IsEmpty]: Start isEmpty. Operand 3035 states and 4836 transitions.
[2019-11-23 23:38:44,377 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 778
[2019-11-23 23:38:44,378 INFO  L402         BasicCegarLoop]: Found error trace
[2019-11-23 23:38:44,378 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 23:38:44,379 INFO  L410      AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-11-23 23:38:44,379 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-11-23 23:38:44,380 INFO  L82        PathProgramCache]: Analyzing trace with hash 219455303, now seen corresponding path program 1 times
[2019-11-23 23:38:44,380 INFO  L163   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2019-11-23 23:38:44,380 INFO  L348   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952147233]
[2019-11-23 23:38:44,380 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-11-23 23:38:44,525 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-23 23:38:46,031 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 23:38:46,031 INFO  L348   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952147233]
[2019-11-23 23:38:46,032 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-11-23 23:38:46,032 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2019-11-23 23:38:46,032 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571376839]
[2019-11-23 23:38:46,033 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 4 states
[2019-11-23 23:38:46,034 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2019-11-23 23:38:46,034 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2019-11-23 23:38:46,034 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2019-11-23 23:38:46,034 INFO  L87              Difference]: Start difference. First operand 3035 states and 4836 transitions. Second operand 4 states.
[2019-11-23 23:38:52,763 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-11-23 23:38:52,763 INFO  L93              Difference]: Finished difference Result 12133 states and 19339 transitions.
[2019-11-23 23:38:52,764 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2019-11-23 23:38:52,764 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 777
[2019-11-23 23:38:52,767 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-11-23 23:38:52,813 INFO  L225             Difference]: With dead ends: 12133
[2019-11-23 23:38:52,813 INFO  L226             Difference]: Without dead ends: 9099
[2019-11-23 23:38:52,820 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 23:38:52,831 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 9099 states.
[2019-11-23 23:38:53,111 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 9099 to 9099.
[2019-11-23 23:38:53,112 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 9099 states.
[2019-11-23 23:38:53,134 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 9099 states to 9099 states and 13852 transitions.
[2019-11-23 23:38:53,134 INFO  L78                 Accepts]: Start accepts. Automaton has 9099 states and 13852 transitions. Word has length 777
[2019-11-23 23:38:53,137 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-11-23 23:38:53,137 INFO  L462      AbstractCegarLoop]: Abstraction has 9099 states and 13852 transitions.
[2019-11-23 23:38:53,137 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2019-11-23 23:38:53,137 INFO  L276                IsEmpty]: Start isEmpty. Operand 9099 states and 13852 transitions.
[2019-11-23 23:38:53,171 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 807
[2019-11-23 23:38:53,171 INFO  L402         BasicCegarLoop]: Found error trace
[2019-11-23 23:38:53,172 INFO  L410         BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:38:53,173 INFO  L410      AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-11-23 23:38:53,173 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-11-23 23:38:53,174 INFO  L82        PathProgramCache]: Analyzing trace with hash -1608870433, now seen corresponding path program 1 times
[2019-11-23 23:38:53,174 INFO  L163   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2019-11-23 23:38:53,175 INFO  L348   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307333421]
[2019-11-23 23:38:53,175 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-11-23 23:38:53,250 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-23 23:38:53,845 INFO  L134       CoverageAnalysis]: Checked inductivity of 54 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked.
[2019-11-23 23:38:53,846 INFO  L348   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307333421]
[2019-11-23 23:38:53,846 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-11-23 23:38:53,847 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2019-11-23 23:38:53,847 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944372332]
[2019-11-23 23:38:53,848 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 4 states
[2019-11-23 23:38:53,849 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2019-11-23 23:38:53,849 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2019-11-23 23:38:53,849 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2019-11-23 23:38:53,850 INFO  L87              Difference]: Start difference. First operand 9099 states and 13852 transitions. Second operand 4 states.
[2019-11-23 23:39:00,414 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-11-23 23:39:00,415 INFO  L93              Difference]: Finished difference Result 36389 states and 55403 transitions.
[2019-11-23 23:39:00,415 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2019-11-23 23:39:00,415 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 806
[2019-11-23 23:39:00,415 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-11-23 23:39:00,499 INFO  L225             Difference]: With dead ends: 36389
[2019-11-23 23:39:00,499 INFO  L226             Difference]: Without dead ends: 27291
[2019-11-23 23:39:00,514 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 23:39:00,543 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 27291 states.
[2019-11-23 23:39:00,927 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 27291 to 27291.
[2019-11-23 23:39:00,927 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 27291 states.
[2019-11-23 23:39:00,975 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 27291 states to 27291 states and 36750 transitions.
[2019-11-23 23:39:00,975 INFO  L78                 Accepts]: Start accepts. Automaton has 27291 states and 36750 transitions. Word has length 806
[2019-11-23 23:39:00,976 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-11-23 23:39:00,976 INFO  L462      AbstractCegarLoop]: Abstraction has 27291 states and 36750 transitions.
[2019-11-23 23:39:00,976 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2019-11-23 23:39:00,976 INFO  L276                IsEmpty]: Start isEmpty. Operand 27291 states and 36750 transitions.
[2019-11-23 23:39:01,036 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 905
[2019-11-23 23:39:01,036 INFO  L402         BasicCegarLoop]: Found error trace
[2019-11-23 23:39:01,037 INFO  L410         BasicCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 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]
[2019-11-23 23:39:01,038 INFO  L410      AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-11-23 23:39:01,038 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-11-23 23:39:01,038 INFO  L82        PathProgramCache]: Analyzing trace with hash -1994941936, now seen corresponding path program 1 times
[2019-11-23 23:39:01,038 INFO  L163   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2019-11-23 23:39:01,040 INFO  L348   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778635297]
[2019-11-23 23:39:01,040 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-11-23 23:39:01,099 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-23 23:39:01,683 INFO  L134       CoverageAnalysis]: Checked inductivity of 246 backedges. 78 proven. 0 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked.
[2019-11-23 23:39:01,683 INFO  L348   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778635297]
[2019-11-23 23:39:01,684 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-11-23 23:39:01,684 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2019-11-23 23:39:01,685 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421874184]
[2019-11-23 23:39:01,686 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 4 states
[2019-11-23 23:39:01,686 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2019-11-23 23:39:01,686 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2019-11-23 23:39:01,687 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2019-11-23 23:39:01,688 INFO  L87              Difference]: Start difference. First operand 27291 states and 36750 transitions. Second operand 4 states.
[2019-11-23 23:39:08,532 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-11-23 23:39:08,534 INFO  L93              Difference]: Finished difference Result 103093 states and 139514 transitions.
[2019-11-23 23:39:08,535 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2019-11-23 23:39:08,535 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 904
[2019-11-23 23:39:08,536 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-11-23 23:39:08,744 INFO  L225             Difference]: With dead ends: 103093
[2019-11-23 23:39:08,745 INFO  L226             Difference]: Without dead ends: 75803
[2019-11-23 23:39:08,798 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 23:39:08,896 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 75803 states.
[2019-11-23 23:39:09,889 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 75803 to 64433.
[2019-11-23 23:39:09,890 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 64433 states.
[2019-11-23 23:39:09,975 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 64433 states to 64433 states and 83361 transitions.
[2019-11-23 23:39:09,976 INFO  L78                 Accepts]: Start accepts. Automaton has 64433 states and 83361 transitions. Word has length 904
[2019-11-23 23:39:09,976 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-11-23 23:39:09,976 INFO  L462      AbstractCegarLoop]: Abstraction has 64433 states and 83361 transitions.
[2019-11-23 23:39:09,976 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2019-11-23 23:39:09,977 INFO  L276                IsEmpty]: Start isEmpty. Operand 64433 states and 83361 transitions.
[2019-11-23 23:39:10,071 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 926
[2019-11-23 23:39:10,071 INFO  L402         BasicCegarLoop]: Found error trace
[2019-11-23 23:39:10,073 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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]
[2019-11-23 23:39:10,073 INFO  L410      AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-11-23 23:39:10,073 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-11-23 23:39:10,074 INFO  L82        PathProgramCache]: Analyzing trace with hash 1625420128, now seen corresponding path program 1 times
[2019-11-23 23:39:10,074 INFO  L163   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2019-11-23 23:39:10,074 INFO  L348   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743263758]
[2019-11-23 23:39:10,075 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-11-23 23:39:10,137 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-23 23:39:12,341 INFO  L134       CoverageAnalysis]: Checked inductivity of 224 backedges. 91 proven. 5 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked.
[2019-11-23 23:39:12,342 INFO  L348   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743263758]
[2019-11-23 23:39:12,342 INFO  L348   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051166911]
[2019-11-23 23:39:12,343 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 23:39:12,686 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-23 23:39:12,690 INFO  L255         TraceCheckSpWp]: Trace formula consists of 1150 conjuncts, 2 conjunts are in the unsatisfiable core
[2019-11-23 23:39:12,724 INFO  L278         TraceCheckSpWp]: Computing forward predicates...
[2019-11-23 23:39:13,370 INFO  L134       CoverageAnalysis]: Checked inductivity of 224 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked.
[2019-11-23 23:39:13,370 INFO  L320         TraceCheckSpWp]: Computing backward predicates...
[2019-11-23 23:39:13,955 INFO  L134       CoverageAnalysis]: Checked inductivity of 224 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked.
[2019-11-23 23:39:13,955 INFO  L220   FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences.
[2019-11-23 23:39:13,956 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [5] total 6
[2019-11-23 23:39:13,956 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737605125]
[2019-11-23 23:39:13,959 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 3 states
[2019-11-23 23:39:13,959 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2019-11-23 23:39:13,959 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2019-11-23 23:39:13,959 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42
[2019-11-23 23:39:13,960 INFO  L87              Difference]: Start difference. First operand 64433 states and 83361 transitions. Second operand 3 states.
[2019-11-23 23:39:18,791 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-11-23 23:39:18,792 INFO  L93              Difference]: Finished difference Result 163733 states and 210471 transitions.
[2019-11-23 23:39:18,792 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2019-11-23 23:39:18,792 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 925
[2019-11-23 23:39:18,792 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-11-23 23:39:18,959 INFO  L225             Difference]: With dead ends: 163733
[2019-11-23 23:39:18,959 INFO  L226             Difference]: Without dead ends: 99301
[2019-11-23 23:39:19,019 INFO  L630         BasicCegarLoop]: 0 DeclaredPredicates, 1853 GetRequests, 1847 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42
[2019-11-23 23:39:19,119 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 99301 states.
[2019-11-23 23:39:20,525 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 99301 to 97785.
[2019-11-23 23:39:20,531 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 97785 states.
[2019-11-23 23:39:20,662 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 97785 states to 97785 states and 117652 transitions.
[2019-11-23 23:39:20,662 INFO  L78                 Accepts]: Start accepts. Automaton has 97785 states and 117652 transitions. Word has length 925
[2019-11-23 23:39:20,663 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-11-23 23:39:20,663 INFO  L462      AbstractCegarLoop]: Abstraction has 97785 states and 117652 transitions.
[2019-11-23 23:39:20,663 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2019-11-23 23:39:20,663 INFO  L276                IsEmpty]: Start isEmpty. Operand 97785 states and 117652 transitions.
[2019-11-23 23:39:20,772 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 1109
[2019-11-23 23:39:20,772 INFO  L402         BasicCegarLoop]: Found error trace
[2019-11-23 23:39:20,773 INFO  L410         BasicCegarLoop]: trace histogram [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, 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, 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, 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, 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]
[2019-11-23 23:39:20,977 WARN  L499      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2019-11-23 23:39:20,978 INFO  L410      AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-11-23 23:39:20,978 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-11-23 23:39:20,978 INFO  L82        PathProgramCache]: Analyzing trace with hash -365346766, now seen corresponding path program 1 times
[2019-11-23 23:39:20,978 INFO  L163   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2019-11-23 23:39:20,979 INFO  L348   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104434174]
[2019-11-23 23:39:20,979 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-11-23 23:39:21,045 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-23 23:39:22,624 INFO  L134       CoverageAnalysis]: Checked inductivity of 679 backedges. 343 proven. 0 refuted. 0 times theorem prover too weak. 336 trivial. 0 not checked.
[2019-11-23 23:39:22,625 INFO  L348   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104434174]
[2019-11-23 23:39:22,625 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-11-23 23:39:22,626 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2019-11-23 23:39:22,626 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711612924]
[2019-11-23 23:39:22,627 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 4 states
[2019-11-23 23:39:22,627 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2019-11-23 23:39:22,628 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2019-11-23 23:39:22,628 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2019-11-23 23:39:22,628 INFO  L87              Difference]: Start difference. First operand 97785 states and 117652 transitions. Second operand 4 states.
[2019-11-23 23:39:29,640 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-11-23 23:39:29,640 INFO  L93              Difference]: Finished difference Result 202391 states and 242785 transitions.
[2019-11-23 23:39:29,640 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2019-11-23 23:39:29,640 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 1108
[2019-11-23 23:39:29,641 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-11-23 23:39:29,753 INFO  L225             Difference]: With dead ends: 202391
[2019-11-23 23:39:29,753 INFO  L226             Difference]: Without dead ends: 104607
[2019-11-23 23:39:29,823 INFO  L630         BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 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 23:39:29,915 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 104607 states.
[2019-11-23 23:39:30,771 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 104607 to 104607.
[2019-11-23 23:39:30,771 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 104607 states.
[2019-11-23 23:39:30,865 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 104607 states to 104607 states and 122104 transitions.
[2019-11-23 23:39:30,865 INFO  L78                 Accepts]: Start accepts. Automaton has 104607 states and 122104 transitions. Word has length 1108
[2019-11-23 23:39:30,866 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-11-23 23:39:30,866 INFO  L462      AbstractCegarLoop]: Abstraction has 104607 states and 122104 transitions.
[2019-11-23 23:39:30,866 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2019-11-23 23:39:30,866 INFO  L276                IsEmpty]: Start isEmpty. Operand 104607 states and 122104 transitions.
[2019-11-23 23:39:33,188 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 1201
[2019-11-23 23:39:33,189 INFO  L402         BasicCegarLoop]: Found error trace
[2019-11-23 23:39:33,190 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, 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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]
[2019-11-23 23:39:33,191 INFO  L410      AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-11-23 23:39:33,191 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-11-23 23:39:33,191 INFO  L82        PathProgramCache]: Analyzing trace with hash -577429755, now seen corresponding path program 1 times
[2019-11-23 23:39:33,192 INFO  L163   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2019-11-23 23:39:33,192 INFO  L348   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200576635]
[2019-11-23 23:39:33,192 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-11-23 23:39:33,274 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-23 23:39:34,455 INFO  L134       CoverageAnalysis]: Checked inductivity of 815 backedges. 596 proven. 0 refuted. 0 times theorem prover too weak. 219 trivial. 0 not checked.
[2019-11-23 23:39:34,456 INFO  L348   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200576635]
[2019-11-23 23:39:34,456 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-11-23 23:39:34,456 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2019-11-23 23:39:34,456 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153273178]
[2019-11-23 23:39:34,458 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 4 states
[2019-11-23 23:39:34,458 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2019-11-23 23:39:34,459 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2019-11-23 23:39:34,459 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2019-11-23 23:39:34,459 INFO  L87              Difference]: Start difference. First operand 104607 states and 122104 transitions. Second operand 4 states.