/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_label42.c


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


This is Ultimate 0.1.24-6598664
[2019-11-23 23:39:34,600 INFO  L177        SettingsManager]: Resetting all preferences to default values...
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[2019-11-23 23:39:34,654 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
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[2019-11-23 23:39:34,674 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
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[2019-11-23 23:39:34,679 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2019-11-23 23:39:34,680 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 23:39:34,710 INFO  L113        SettingsManager]: Loading preferences was successful
[2019-11-23 23:39:34,710 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2019-11-23 23:39:34,712 INFO  L136        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2019-11-23 23:39:34,712 INFO  L138        SettingsManager]:  * User list type=DISABLED
[2019-11-23 23:39:34,712 INFO  L136        SettingsManager]: Preferences of Abstract Interpretation differ from their defaults:
[2019-11-23 23:39:34,712 INFO  L138        SettingsManager]:  * Explicit value domain=true
[2019-11-23 23:39:34,713 INFO  L138        SettingsManager]:  * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain
[2019-11-23 23:39:34,713 INFO  L138        SettingsManager]:  * Octagon Domain=false
[2019-11-23 23:39:34,713 INFO  L138        SettingsManager]:  * Abstract domain=CompoundDomain
[2019-11-23 23:39:34,713 INFO  L138        SettingsManager]:  * Check feasibility of abstract posts with an SMT solver=true
[2019-11-23 23:39:34,713 INFO  L138        SettingsManager]:  * Use the RCFG-of-the-future interface=true
[2019-11-23 23:39:34,714 INFO  L138        SettingsManager]:  * Interval Domain=false
[2019-11-23 23:39:34,714 INFO  L136        SettingsManager]: Preferences of Sifa differ from their defaults:
[2019-11-23 23:39:34,714 INFO  L138        SettingsManager]:  * Call Summarizer=TopInputCallSummarizer
[2019-11-23 23:39:34,714 INFO  L138        SettingsManager]:  * Simplification Technique=SIMPLIFY_QUICK
[2019-11-23 23:39:34,715 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2019-11-23 23:39:34,715 INFO  L138        SettingsManager]:  * sizeof long=4
[2019-11-23 23:39:34,716 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2019-11-23 23:39:34,716 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2019-11-23 23:39:34,716 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2019-11-23 23:39:34,716 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2019-11-23 23:39:34,716 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2019-11-23 23:39:34,717 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2019-11-23 23:39:34,717 INFO  L138        SettingsManager]:  * sizeof long double=12
[2019-11-23 23:39:34,717 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2019-11-23 23:39:34,717 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2019-11-23 23:39:34,718 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2019-11-23 23:39:34,718 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2019-11-23 23:39:34,718 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2019-11-23 23:39:34,718 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2019-11-23 23:39:34,718 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2019-11-23 23:39:34,719 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2019-11-23 23:39:34,719 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2019-11-23 23:39:34,719 INFO  L138        SettingsManager]:  * Trace refinement strategy=SIFA_TAIPAN
[2019-11-23 23:39:34,719 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2019-11-23 23:39:34,720 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2019-11-23 23:39:34,720 INFO  L138        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2019-11-23 23:39:34,720 INFO  L138        SettingsManager]:  * Abstract interpretation Mode=USE_PREDICATES
[2019-11-23 23:39:34,999 INFO  L81    nceAwareModelManager]: Repository-Root is: /tmp
[2019-11-23 23:39:35,017 INFO  L258   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2019-11-23 23:39:35,021 INFO  L214   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2019-11-23 23:39:35,022 INFO  L271        PluginConnector]: Initializing CDTParser...
[2019-11-23 23:39:35,023 INFO  L275        PluginConnector]: CDTParser initialized
[2019-11-23 23:39:35,024 INFO  L428   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem04_label42.c
[2019-11-23 23:39:35,088 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9626c6fb7/fb96c489c47d45b09c832b146ef45a5a/FLAGafe3e952c
[2019-11-23 23:39:35,828 INFO  L306              CDTParser]: Found 1 translation units.
[2019-11-23 23:39:35,829 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem04_label42.c
[2019-11-23 23:39:35,856 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9626c6fb7/fb96c489c47d45b09c832b146ef45a5a/FLAGafe3e952c
[2019-11-23 23:39:35,909 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9626c6fb7/fb96c489c47d45b09c832b146ef45a5a
[2019-11-23 23:39:35,920 INFO  L296   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2019-11-23 23:39:35,922 INFO  L131        ToolchainWalker]: Walking toolchain with 5 elements.
[2019-11-23 23:39:35,923 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2019-11-23 23:39:35,924 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2019-11-23 23:39:35,927 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2019-11-23 23:39:35,929 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 11:39:35" (1/1) ...
[2019-11-23 23:39:35,932 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f57de1b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:39:35, skipping insertion in model container
[2019-11-23 23:39:35,932 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 11:39:35" (1/1) ...
[2019-11-23 23:39:35,941 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2019-11-23 23:39:36,148 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2019-11-23 23:39:37,743 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2019-11-23 23:39:37,754 INFO  L203         MainTranslator]: Completed pre-run
[2019-11-23 23:39:38,499 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2019-11-23 23:39:38,531 INFO  L208         MainTranslator]: Completed translation
[2019-11-23 23:39:38,531 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:39:38 WrapperNode
[2019-11-23 23:39:38,532 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2019-11-23 23:39:38,532 INFO  L113        PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2019-11-23 23:39:38,533 INFO  L271        PluginConnector]: Initializing Boogie Procedure Inliner...
[2019-11-23 23:39:38,533 INFO  L275        PluginConnector]: Boogie Procedure Inliner initialized
[2019-11-23 23:39:38,542 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:39:38" (1/1) ...
[2019-11-23 23:39:38,590 INFO  L185        PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:39:38" (1/1) ...
[2019-11-23 23:39:38,761 INFO  L132        PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2019-11-23 23:39:38,762 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2019-11-23 23:39:38,762 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2019-11-23 23:39:38,762 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2019-11-23 23:39:38,773 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:39:38" (1/1) ...
[2019-11-23 23:39:38,773 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:39:38" (1/1) ...
[2019-11-23 23:39:38,789 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:39:38" (1/1) ...
[2019-11-23 23:39:38,790 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:39:38" (1/1) ...
[2019-11-23 23:39:38,875 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:39:38" (1/1) ...
[2019-11-23 23:39:38,910 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:39:38" (1/1) ...
[2019-11-23 23:39:38,929 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:39:38" (1/1) ...
[2019-11-23 23:39:38,951 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2019-11-23 23:39:38,951 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2019-11-23 23:39:38,951 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2019-11-23 23:39:38,952 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2019-11-23 23:39:38,952 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:39:38" (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 23:39:39,031 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2019-11-23 23:39:39,031 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2019-11-23 23:39:44,251 INFO  L279             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2019-11-23 23:39:44,252 INFO  L284             CfgBuilder]: Removed 13 assume(true) statements.
[2019-11-23 23:39:44,253 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 11:39:44 BoogieIcfgContainer
[2019-11-23 23:39:44,253 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2019-11-23 23:39:44,255 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2019-11-23 23:39:44,255 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2019-11-23 23:39:44,258 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2019-11-23 23:39:44,258 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 11:39:35" (1/3) ...
[2019-11-23 23:39:44,259 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7194725b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 11:39:44, skipping insertion in model container
[2019-11-23 23:39:44,259 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:39:38" (2/3) ...
[2019-11-23 23:39:44,260 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7194725b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 11:39:44, skipping insertion in model container
[2019-11-23 23:39:44,260 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 11:39:44" (3/3) ...
[2019-11-23 23:39:44,262 INFO  L109   eAbstractionObserver]: Analyzing ICFG Problem04_label42.c
[2019-11-23 23:39:44,271 INFO  L153   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2019-11-23 23:39:44,279 INFO  L165   ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2019-11-23 23:39:44,291 INFO  L249      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2019-11-23 23:39:44,332 INFO  L373      AbstractCegarLoop]: Interprodecural is true
[2019-11-23 23:39:44,332 INFO  L374      AbstractCegarLoop]: Hoare is true
[2019-11-23 23:39:44,332 INFO  L375      AbstractCegarLoop]: Compute interpolants for FPandBP
[2019-11-23 23:39:44,332 INFO  L376      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2019-11-23 23:39:44,333 INFO  L377      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2019-11-23 23:39:44,333 INFO  L378      AbstractCegarLoop]: Difference is false
[2019-11-23 23:39:44,333 INFO  L379      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2019-11-23 23:39:44,333 INFO  L383      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2019-11-23 23:39:44,368 INFO  L276                IsEmpty]: Start isEmpty. Operand 763 states.
[2019-11-23 23:39:44,412 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 756
[2019-11-23 23:39:44,412 INFO  L402         BasicCegarLoop]: Found error trace
[2019-11-23 23:39:44,414 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 23:39:44,415 INFO  L410      AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-11-23 23:39:44,420 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-11-23 23:39:44,421 INFO  L82        PathProgramCache]: Analyzing trace with hash -1870331843, now seen corresponding path program 1 times
[2019-11-23 23:39:44,431 INFO  L163   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2019-11-23 23:39:44,431 INFO  L348   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255981007]
[2019-11-23 23:39:44,432 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-11-23 23:39:44,889 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-23 23:39:49,446 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 23:39:49,447 INFO  L348   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255981007]
[2019-11-23 23:39:49,448 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-11-23 23:39:49,449 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2019-11-23 23:39:49,450 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503346342]
[2019-11-23 23:39:49,457 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 5 states
[2019-11-23 23:39:49,457 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2019-11-23 23:39:49,470 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2019-11-23 23:39:49,471 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20
[2019-11-23 23:39:49,474 INFO  L87              Difference]: Start difference. First operand 763 states. Second operand 5 states.
[2019-11-23 23:39:57,251 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-11-23 23:39:57,252 INFO  L93              Difference]: Finished difference Result 3049 states and 6058 transitions.
[2019-11-23 23:39:57,252 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2019-11-23 23:39:57,253 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 755
[2019-11-23 23:39:57,262 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-11-23 23:39:57,304 INFO  L225             Difference]: With dead ends: 3049
[2019-11-23 23:39:57,304 INFO  L226             Difference]: Without dead ends: 2279
[2019-11-23 23:39:57,311 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 23:39:57,333 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 2279 states.
[2019-11-23 23:39:57,475 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 2279 to 2277.
[2019-11-23 23:39:57,477 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 2277 states.
[2019-11-23 23:39:57,486 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 2277 states to 2277 states and 3567 transitions.
[2019-11-23 23:39:57,490 INFO  L78                 Accepts]: Start accepts. Automaton has 2277 states and 3567 transitions. Word has length 755
[2019-11-23 23:39:57,493 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-11-23 23:39:57,493 INFO  L462      AbstractCegarLoop]: Abstraction has 2277 states and 3567 transitions.
[2019-11-23 23:39:57,493 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2019-11-23 23:39:57,493 INFO  L276                IsEmpty]: Start isEmpty. Operand 2277 states and 3567 transitions.
[2019-11-23 23:39:57,525 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 782
[2019-11-23 23:39:57,526 INFO  L402         BasicCegarLoop]: Found error trace
[2019-11-23 23:39:57,526 INFO  L410         BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 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 23:39:57,527 INFO  L410      AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-11-23 23:39:57,527 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-11-23 23:39:57,527 INFO  L82        PathProgramCache]: Analyzing trace with hash 1561498791, now seen corresponding path program 1 times
[2019-11-23 23:39:57,528 INFO  L163   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2019-11-23 23:39:57,528 INFO  L348   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544224463]
[2019-11-23 23:39:57,528 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-11-23 23:39:57,632 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-23 23:39:58,100 INFO  L134       CoverageAnalysis]: Checked inductivity of 35 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked.
[2019-11-23 23:39:58,100 INFO  L348   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544224463]
[2019-11-23 23:39:58,101 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-11-23 23:39:58,101 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2019-11-23 23:39:58,103 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529167792]
[2019-11-23 23:39:58,107 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 3 states
[2019-11-23 23:39:58,108 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2019-11-23 23:39:58,109 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2019-11-23 23:39:58,109 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2019-11-23 23:39:58,109 INFO  L87              Difference]: Start difference. First operand 2277 states and 3567 transitions. Second operand 3 states.
[2019-11-23 23:40:02,134 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-11-23 23:40:02,135 INFO  L93              Difference]: Finished difference Result 5311 states and 9170 transitions.
[2019-11-23 23:40:02,135 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2019-11-23 23:40:02,135 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 781
[2019-11-23 23:40:02,136 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-11-23 23:40:02,156 INFO  L225             Difference]: With dead ends: 5311
[2019-11-23 23:40:02,156 INFO  L226             Difference]: Without dead ends: 3793
[2019-11-23 23:40:02,160 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 23:40:02,165 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 3793 states.
[2019-11-23 23:40:02,232 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 3793 to 3793.
[2019-11-23 23:40:02,232 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 3793 states.
[2019-11-23 23:40:02,239 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 3793 states to 3793 states and 5984 transitions.
[2019-11-23 23:40:02,240 INFO  L78                 Accepts]: Start accepts. Automaton has 3793 states and 5984 transitions. Word has length 781
[2019-11-23 23:40:02,240 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-11-23 23:40:02,240 INFO  L462      AbstractCegarLoop]: Abstraction has 3793 states and 5984 transitions.
[2019-11-23 23:40:02,240 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2019-11-23 23:40:02,240 INFO  L276                IsEmpty]: Start isEmpty. Operand 3793 states and 5984 transitions.
[2019-11-23 23:40:02,253 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 787
[2019-11-23 23:40:02,253 INFO  L402         BasicCegarLoop]: Found error trace
[2019-11-23 23:40:02,254 INFO  L410         BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-11-23 23:40:02,254 INFO  L410      AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-11-23 23:40:02,254 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-11-23 23:40:02,255 INFO  L82        PathProgramCache]: Analyzing trace with hash 1928706859, now seen corresponding path program 1 times
[2019-11-23 23:40:02,255 INFO  L163   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2019-11-23 23:40:02,255 INFO  L348   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133109361]
[2019-11-23 23:40:02,256 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-11-23 23:40:02,309 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-23 23:40:02,771 INFO  L134       CoverageAnalysis]: Checked inductivity of 49 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked.
[2019-11-23 23:40:02,772 INFO  L348   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133109361]
[2019-11-23 23:40:02,772 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-11-23 23:40:02,772 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2019-11-23 23:40:02,773 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318856942]
[2019-11-23 23:40:02,775 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 3 states
[2019-11-23 23:40:02,775 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2019-11-23 23:40:02,775 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2019-11-23 23:40:02,776 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2019-11-23 23:40:02,776 INFO  L87              Difference]: Start difference. First operand 3793 states and 5984 transitions. Second operand 3 states.
[2019-11-23 23:40:06,842 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-11-23 23:40:06,843 INFO  L93              Difference]: Finished difference Result 9859 states and 16421 transitions.
[2019-11-23 23:40:06,850 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2019-11-23 23:40:06,850 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 786
[2019-11-23 23:40:06,850 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-11-23 23:40:06,882 INFO  L225             Difference]: With dead ends: 9859
[2019-11-23 23:40:06,882 INFO  L226             Difference]: Without dead ends: 6825
[2019-11-23 23:40:06,888 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 23:40:06,895 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 6825 states.
[2019-11-23 23:40:07,020 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 6825 to 6825.
[2019-11-23 23:40:07,021 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 6825 states.
[2019-11-23 23:40:07,033 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6825 states to 6825 states and 9900 transitions.
[2019-11-23 23:40:07,034 INFO  L78                 Accepts]: Start accepts. Automaton has 6825 states and 9900 transitions. Word has length 786
[2019-11-23 23:40:07,034 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-11-23 23:40:07,034 INFO  L462      AbstractCegarLoop]: Abstraction has 6825 states and 9900 transitions.
[2019-11-23 23:40:07,034 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2019-11-23 23:40:07,035 INFO  L276                IsEmpty]: Start isEmpty. Operand 6825 states and 9900 transitions.
[2019-11-23 23:40:07,060 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 821
[2019-11-23 23:40:07,060 INFO  L402         BasicCegarLoop]: Found error trace
[2019-11-23 23:40:07,061 INFO  L410         BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:40:07,061 INFO  L410      AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-11-23 23:40:07,061 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-11-23 23:40:07,062 INFO  L82        PathProgramCache]: Analyzing trace with hash 1657077185, now seen corresponding path program 1 times
[2019-11-23 23:40:07,062 INFO  L163   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2019-11-23 23:40:07,062 INFO  L348   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921693306]
[2019-11-23 23:40:07,063 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-11-23 23:40:07,146 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-23 23:40:07,739 INFO  L134       CoverageAnalysis]: Checked inductivity of 78 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked.
[2019-11-23 23:40:07,740 INFO  L348   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921693306]
[2019-11-23 23:40:07,741 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-11-23 23:40:07,741 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2019-11-23 23:40:07,741 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031173986]
[2019-11-23 23:40:07,743 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 4 states
[2019-11-23 23:40:07,743 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2019-11-23 23:40:07,744 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2019-11-23 23:40:07,744 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2019-11-23 23:40:07,744 INFO  L87              Difference]: Start difference. First operand 6825 states and 9900 transitions. Second operand 4 states.
[2019-11-23 23:40:14,691 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-11-23 23:40:14,691 INFO  L93              Difference]: Finished difference Result 25019 states and 37303 transitions.
[2019-11-23 23:40:14,697 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2019-11-23 23:40:14,697 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 820
[2019-11-23 23:40:14,697 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-11-23 23:40:14,770 INFO  L225             Difference]: With dead ends: 25019
[2019-11-23 23:40:14,770 INFO  L226             Difference]: Without dead ends: 18953
[2019-11-23 23:40:14,780 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 23:40:14,799 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 18953 states.
[2019-11-23 23:40:15,038 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 18953 to 18953.
[2019-11-23 23:40:15,038 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 18953 states.
[2019-11-23 23:40:15,065 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 18953 states to 18953 states and 24960 transitions.
[2019-11-23 23:40:15,066 INFO  L78                 Accepts]: Start accepts. Automaton has 18953 states and 24960 transitions. Word has length 820
[2019-11-23 23:40:15,066 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-11-23 23:40:15,066 INFO  L462      AbstractCegarLoop]: Abstraction has 18953 states and 24960 transitions.
[2019-11-23 23:40:15,066 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2019-11-23 23:40:15,067 INFO  L276                IsEmpty]: Start isEmpty. Operand 18953 states and 24960 transitions.
[2019-11-23 23:40:15,103 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 867
[2019-11-23 23:40:15,103 INFO  L402         BasicCegarLoop]: Found error trace
[2019-11-23 23:40:15,104 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:40:15,105 INFO  L410      AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-11-23 23:40:15,105 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-11-23 23:40:15,106 INFO  L82        PathProgramCache]: Analyzing trace with hash -1470079069, now seen corresponding path program 1 times
[2019-11-23 23:40:15,106 INFO  L163   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2019-11-23 23:40:15,106 INFO  L348   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434695522]
[2019-11-23 23:40:15,107 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-11-23 23:40:15,188 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-23 23:40:15,821 INFO  L134       CoverageAnalysis]: Checked inductivity of 165 backedges. 138 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked.
[2019-11-23 23:40:15,821 INFO  L348   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434695522]
[2019-11-23 23:40:15,822 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-11-23 23:40:15,822 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2019-11-23 23:40:15,822 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424857683]
[2019-11-23 23:40:15,823 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 4 states
[2019-11-23 23:40:15,823 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2019-11-23 23:40:15,824 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2019-11-23 23:40:15,824 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2019-11-23 23:40:15,824 INFO  L87              Difference]: Start difference. First operand 18953 states and 24960 transitions. Second operand 4 states.
[2019-11-23 23:40:22,591 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-11-23 23:40:22,591 INFO  L93              Difference]: Finished difference Result 70499 states and 93531 transitions.
[2019-11-23 23:40:22,591 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2019-11-23 23:40:22,592 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 866
[2019-11-23 23:40:22,592 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-11-23 23:40:22,697 INFO  L225             Difference]: With dead ends: 70499
[2019-11-23 23:40:22,697 INFO  L226             Difference]: Without dead ends: 52305
[2019-11-23 23:40:22,725 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 23:40:22,778 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 52305 states.
[2019-11-23 23:40:23,396 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 52305 to 52305.
[2019-11-23 23:40:23,397 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 52305 states.
[2019-11-23 23:40:24,826 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 52305 states to 52305 states and 67210 transitions.
[2019-11-23 23:40:24,826 INFO  L78                 Accepts]: Start accepts. Automaton has 52305 states and 67210 transitions. Word has length 866
[2019-11-23 23:40:24,827 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-11-23 23:40:24,827 INFO  L462      AbstractCegarLoop]: Abstraction has 52305 states and 67210 transitions.
[2019-11-23 23:40:24,827 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2019-11-23 23:40:24,828 INFO  L276                IsEmpty]: Start isEmpty. Operand 52305 states and 67210 transitions.
[2019-11-23 23:40:24,899 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 877
[2019-11-23 23:40:24,899 INFO  L402         BasicCegarLoop]: Found error trace
[2019-11-23 23:40:24,900 INFO  L410         BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 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, 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 23:40:24,901 INFO  L410      AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-11-23 23:40:24,901 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-11-23 23:40:24,901 INFO  L82        PathProgramCache]: Analyzing trace with hash 25043506, now seen corresponding path program 1 times
[2019-11-23 23:40:24,902 INFO  L163   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2019-11-23 23:40:24,902 INFO  L348   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451429243]
[2019-11-23 23:40:24,902 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-11-23 23:40:24,963 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-23 23:40:25,768 INFO  L134       CoverageAnalysis]: Checked inductivity of 243 backedges. 146 proven. 4 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked.
[2019-11-23 23:40:25,769 INFO  L348   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451429243]
[2019-11-23 23:40:25,769 INFO  L348   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747960775]
[2019-11-23 23:40:25,769 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2019-11-23 23:40:26,182 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-23 23:40:26,189 INFO  L255         TraceCheckSpWp]: Trace formula consists of 1182 conjuncts, 2 conjunts are in the unsatisfiable core
[2019-11-23 23:40:26,245 INFO  L278         TraceCheckSpWp]: Computing forward predicates...
[2019-11-23 23:40:26,753 INFO  L134       CoverageAnalysis]: Checked inductivity of 243 backedges. 146 proven. 0 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked.
[2019-11-23 23:40:26,754 INFO  L320         TraceCheckSpWp]: Computing backward predicates...
[2019-11-23 23:40:27,186 INFO  L134       CoverageAnalysis]: Checked inductivity of 243 backedges. 146 proven. 0 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked.
[2019-11-23 23:40:27,187 INFO  L220   FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences.
[2019-11-23 23:40:27,187 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [3] total 4
[2019-11-23 23:40:27,187 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618329625]
[2019-11-23 23:40:27,190 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 3 states
[2019-11-23 23:40:27,190 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2019-11-23 23:40:27,190 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2019-11-23 23:40:27,191 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20
[2019-11-23 23:40:27,191 INFO  L87              Difference]: Start difference. First operand 52305 states and 67210 transitions. Second operand 3 states.
[2019-11-23 23:40:31,682 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-11-23 23:40:31,682 INFO  L93              Difference]: Finished difference Result 123559 states and 158235 transitions.
[2019-11-23 23:40:31,685 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2019-11-23 23:40:31,685 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 876
[2019-11-23 23:40:31,685 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-11-23 23:40:31,814 INFO  L225             Difference]: With dead ends: 123559
[2019-11-23 23:40:31,814 INFO  L226             Difference]: Without dead ends: 72013
[2019-11-23 23:40:31,882 INFO  L630         BasicCegarLoop]: 0 DeclaredPredicates, 1754 GetRequests, 1749 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20
[2019-11-23 23:40:31,977 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 72013 states.
[2019-11-23 23:40:33,366 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 72013 to 72013.
[2019-11-23 23:40:33,370 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 72013 states.
[2019-11-23 23:40:33,469 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 72013 states to 72013 states and 89012 transitions.
[2019-11-23 23:40:33,470 INFO  L78                 Accepts]: Start accepts. Automaton has 72013 states and 89012 transitions. Word has length 876
[2019-11-23 23:40:33,470 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-11-23 23:40:33,470 INFO  L462      AbstractCegarLoop]: Abstraction has 72013 states and 89012 transitions.
[2019-11-23 23:40:33,470 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2019-11-23 23:40:33,471 INFO  L276                IsEmpty]: Start isEmpty. Operand 72013 states and 89012 transitions.
[2019-11-23 23:40:33,532 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 1008
[2019-11-23 23:40:33,532 INFO  L402         BasicCegarLoop]: Found error trace
[2019-11-23 23:40:33,533 INFO  L410         BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 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, 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]
[2019-11-23 23:40:33,740 WARN  L499      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2019-11-23 23:40:33,740 INFO  L410      AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-11-23 23:40:33,740 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-11-23 23:40:33,741 INFO  L82        PathProgramCache]: Analyzing trace with hash 478162640, now seen corresponding path program 1 times
[2019-11-23 23:40:33,743 INFO  L163   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2019-11-23 23:40:33,743 INFO  L348   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091963501]
[2019-11-23 23:40:33,744 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-11-23 23:40:33,834 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-23 23:40:36,163 INFO  L134       CoverageAnalysis]: Checked inductivity of 632 backedges. 318 proven. 0 refuted. 0 times theorem prover too weak. 314 trivial. 0 not checked.
[2019-11-23 23:40:36,164 INFO  L348   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091963501]
[2019-11-23 23:40:36,164 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-11-23 23:40:36,164 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2019-11-23 23:40:36,164 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416977661]
[2019-11-23 23:40:36,166 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 3 states
[2019-11-23 23:40:36,167 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2019-11-23 23:40:36,167 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2019-11-23 23:40:36,168 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2019-11-23 23:40:36,168 INFO  L87              Difference]: Start difference. First operand 72013 states and 89012 transitions. Second operand 3 states.
[2019-11-23 23:40:40,998 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-11-23 23:40:40,999 INFO  L93              Difference]: Finished difference Result 174345 states and 215572 transitions.
[2019-11-23 23:40:40,999 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2019-11-23 23:40:40,999 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 1007
[2019-11-23 23:40:41,000 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-11-23 23:40:41,123 INFO  L225             Difference]: With dead ends: 174345
[2019-11-23 23:40:41,123 INFO  L226             Difference]: Without dead ends: 103091
[2019-11-23 23:40:41,181 INFO  L630         BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 2 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 23:40:41,268 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 103091 states.
[2019-11-23 23:40:42,261 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 103091 to 100059.
[2019-11-23 23:40:42,261 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 100059 states.
[2019-11-23 23:40:42,345 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 100059 states to 100059 states and 118755 transitions.
[2019-11-23 23:40:42,345 INFO  L78                 Accepts]: Start accepts. Automaton has 100059 states and 118755 transitions. Word has length 1007
[2019-11-23 23:40:42,346 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-11-23 23:40:42,346 INFO  L462      AbstractCegarLoop]: Abstraction has 100059 states and 118755 transitions.
[2019-11-23 23:40:42,346 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2019-11-23 23:40:42,346 INFO  L276                IsEmpty]: Start isEmpty. Operand 100059 states and 118755 transitions.
[2019-11-23 23:40:42,409 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 1097
[2019-11-23 23:40:42,409 INFO  L402         BasicCegarLoop]: Found error trace
[2019-11-23 23:40:42,410 INFO  L410         BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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]
[2019-11-23 23:40:42,410 INFO  L410      AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-11-23 23:40:42,411 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-11-23 23:40:42,411 INFO  L82        PathProgramCache]: Analyzing trace with hash -2009509788, now seen corresponding path program 1 times
[2019-11-23 23:40:42,411 INFO  L163   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2019-11-23 23:40:42,412 INFO  L348   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070163661]
[2019-11-23 23:40:42,412 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-11-23 23:40:42,525 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-23 23:40:46,023 INFO  L134       CoverageAnalysis]: Checked inductivity of 353 backedges. 349 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-11-23 23:40:46,024 INFO  L348   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070163661]
[2019-11-23 23:40:46,024 INFO  L348   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645380465]
[2019-11-23 23:40:46,024 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 23:40:46,406 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-23 23:40:46,409 INFO  L255         TraceCheckSpWp]: Trace formula consists of 1301 conjuncts, 2 conjunts are in the unsatisfiable core
[2019-11-23 23:40:46,426 INFO  L278         TraceCheckSpWp]: Computing forward predicates...
[2019-11-23 23:40:47,251 INFO  L134       CoverageAnalysis]: Checked inductivity of 353 backedges. 339 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked.
[2019-11-23 23:40:47,252 INFO  L320         TraceCheckSpWp]: Computing backward predicates...
[2019-11-23 23:40:48,105 INFO  L134       CoverageAnalysis]: Checked inductivity of 353 backedges. 339 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked.
[2019-11-23 23:40:48,105 INFO  L220   FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences.
[2019-11-23 23:40:48,106 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 8
[2019-11-23 23:40:48,106 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365023137]
[2019-11-23 23:40:48,107 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 3 states
[2019-11-23 23:40:48,108 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2019-11-23 23:40:48,108 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2019-11-23 23:40:48,108 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56
[2019-11-23 23:40:48,108 INFO  L87              Difference]: Start difference. First operand 100059 states and 118755 transitions. Second operand 3 states.