java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --abstractinterpretationv2.abstract.domain IntervalDomain --traceabstraction.trace.refinement.strategy TAIPAN --traceabstraction.abstract.interpretation.mode USE_PREDICATES -i ../../../trunk/examples/svcomp/eca-rers2012/Problem04_label59.c


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


This is Ultimate 0.1.24-13a467a-m
[2019-10-15 00:00:25,730 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2019-10-15 00:00:25,733 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2019-10-15 00:00:25,752 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2019-10-15 00:00:25,753 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2019-10-15 00:00:25,755 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2019-10-15 00:00:25,756 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
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[2019-10-15 00:00:25,776 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
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[2019-10-15 00:00:25,781 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2019-10-15 00:00:25,783 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2019-10-15 00:00:25,784 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2019-10-15 00:00:25,785 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2019-10-15 00:00:25,790 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2019-10-15 00:00:25,795 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2019-10-15 00:00:25,798 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2019-10-15 00:00:25,801 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2019-10-15 00:00:25,802 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2019-10-15 00:00:25,804 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
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[2019-10-15 00:00:25,818 INFO  L101        SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf
[2019-10-15 00:00:25,851 INFO  L113        SettingsManager]: Loading preferences was successful
[2019-10-15 00:00:25,855 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2019-10-15 00:00:25,858 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2019-10-15 00:00:25,858 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2019-10-15 00:00:25,858 INFO  L138        SettingsManager]:  * Use SBE=true
[2019-10-15 00:00:25,858 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2019-10-15 00:00:25,859 INFO  L138        SettingsManager]:  * sizeof long=4
[2019-10-15 00:00:25,859 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2019-10-15 00:00:25,859 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2019-10-15 00:00:25,859 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2019-10-15 00:00:25,859 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2019-10-15 00:00:25,860 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2019-10-15 00:00:25,860 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2019-10-15 00:00:25,860 INFO  L138        SettingsManager]:  * sizeof long double=12
[2019-10-15 00:00:25,860 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2019-10-15 00:00:25,860 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2019-10-15 00:00:25,861 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2019-10-15 00:00:25,861 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2019-10-15 00:00:25,861 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2019-10-15 00:00:25,861 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2019-10-15 00:00:25,861 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2019-10-15 00:00:25,862 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2019-10-15 00:00:25,862 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2019-10-15 00:00:25,862 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2019-10-15 00:00:25,862 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2019-10-15 00:00:25,862 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2019-10-15 00:00:25,862 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2019-10-15 00:00:25,863 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2019-10-15 00:00:25,863 INFO  L138        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: Abstract domain -> IntervalDomain
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> TAIPAN
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Abstract interpretation Mode -> USE_PREDICATES
[2019-10-15 00:00:26,179 INFO  L81    nceAwareModelManager]: Repository-Root is: /tmp
[2019-10-15 00:00:26,193 INFO  L258   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2019-10-15 00:00:26,197 INFO  L214   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2019-10-15 00:00:26,198 INFO  L271        PluginConnector]: Initializing CDTParser...
[2019-10-15 00:00:26,199 INFO  L275        PluginConnector]: CDTParser initialized
[2019-10-15 00:00:26,200 INFO  L428   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem04_label59.c
[2019-10-15 00:00:26,277 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0dd4bc357/8eb81d64a8554895ab865cf34ed19964/FLAGf07a91aa7
[2019-10-15 00:00:27,081 INFO  L306              CDTParser]: Found 1 translation units.
[2019-10-15 00:00:27,084 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem04_label59.c
[2019-10-15 00:00:27,116 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0dd4bc357/8eb81d64a8554895ab865cf34ed19964/FLAGf07a91aa7
[2019-10-15 00:00:27,611 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0dd4bc357/8eb81d64a8554895ab865cf34ed19964
[2019-10-15 00:00:27,623 INFO  L296   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2019-10-15 00:00:27,625 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2019-10-15 00:00:27,627 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2019-10-15 00:00:27,627 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2019-10-15 00:00:27,632 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2019-10-15 00:00:27,633 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:00:27" (1/1) ...
[2019-10-15 00:00:27,637 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d836b77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:00:27, skipping insertion in model container
[2019-10-15 00:00:27,637 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:00:27" (1/1) ...
[2019-10-15 00:00:27,648 INFO  L142         MainTranslator]: Starting translation in SV-COMP mode 
[2019-10-15 00:00:27,829 INFO  L173         MainTranslator]: Built tables and reachable declarations
[2019-10-15 00:00:29,581 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2019-10-15 00:00:29,592 INFO  L188         MainTranslator]: Completed pre-run
[2019-10-15 00:00:30,243 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2019-10-15 00:00:30,274 INFO  L192         MainTranslator]: Completed translation
[2019-10-15 00:00:30,275 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:00:30 WrapperNode
[2019-10-15 00:00:30,275 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2019-10-15 00:00:30,276 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2019-10-15 00:00:30,276 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2019-10-15 00:00:30,276 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2019-10-15 00:00:30,290 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:00:30" (1/1) ...
[2019-10-15 00:00:30,291 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:00:30" (1/1) ...
[2019-10-15 00:00:30,343 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:00:30" (1/1) ...
[2019-10-15 00:00:30,345 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:00:30" (1/1) ...
[2019-10-15 00:00:30,446 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:00:30" (1/1) ...
[2019-10-15 00:00:30,493 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:00:30" (1/1) ...
[2019-10-15 00:00:30,517 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:00:30" (1/1) ...
[2019-10-15 00:00:30,546 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2019-10-15 00:00:30,547 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2019-10-15 00:00:30,547 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2019-10-15 00:00:30,547 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2019-10-15 00:00:30,548 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:00:30" (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
[2019-10-15 00:00:30,630 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2019-10-15 00:00:30,631 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2019-10-15 00:00:30,631 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output
[2019-10-15 00:00:30,631 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output2
[2019-10-15 00:00:30,631 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output3
[2019-10-15 00:00:30,633 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output4
[2019-10-15 00:00:30,633 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2019-10-15 00:00:30,634 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output
[2019-10-15 00:00:30,635 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output2
[2019-10-15 00:00:30,637 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output3
[2019-10-15 00:00:30,637 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output4
[2019-10-15 00:00:30,637 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2019-10-15 00:00:30,637 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int
[2019-10-15 00:00:30,639 INFO  L130     BoogieDeclarations]: Found specification of procedure exit
[2019-10-15 00:00:30,639 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2019-10-15 00:00:30,639 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2019-10-15 00:00:30,640 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2019-10-15 00:00:35,477 INFO  L279             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2019-10-15 00:00:35,478 INFO  L284             CfgBuilder]: Removed 1 assume(true) statements.
[2019-10-15 00:00:35,480 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:00:35 BoogieIcfgContainer
[2019-10-15 00:00:35,480 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2019-10-15 00:00:35,482 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2019-10-15 00:00:35,482 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2019-10-15 00:00:35,487 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2019-10-15 00:00:35,487 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 12:00:27" (1/3) ...
[2019-10-15 00:00:35,488 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3cac1c60 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:00:35, skipping insertion in model container
[2019-10-15 00:00:35,488 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:00:30" (2/3) ...
[2019-10-15 00:00:35,489 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3cac1c60 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:00:35, skipping insertion in model container
[2019-10-15 00:00:35,490 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:00:35" (3/3) ...
[2019-10-15 00:00:35,500 INFO  L109   eAbstractionObserver]: Analyzing ICFG Problem04_label59.c
[2019-10-15 00:00:35,512 INFO  L152   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2019-10-15 00:00:35,523 INFO  L164   ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2019-10-15 00:00:35,535 INFO  L249      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2019-10-15 00:00:35,579 INFO  L373      AbstractCegarLoop]: Interprodecural is true
[2019-10-15 00:00:35,579 INFO  L374      AbstractCegarLoop]: Hoare is true
[2019-10-15 00:00:35,579 INFO  L375      AbstractCegarLoop]: Compute interpolants for FPandBP
[2019-10-15 00:00:35,579 INFO  L376      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2019-10-15 00:00:35,580 INFO  L377      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2019-10-15 00:00:35,580 INFO  L378      AbstractCegarLoop]: Difference is false
[2019-10-15 00:00:35,580 INFO  L379      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2019-10-15 00:00:35,580 INFO  L383      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2019-10-15 00:00:35,634 INFO  L276                IsEmpty]: Start isEmpty. Operand 906 states.
[2019-10-15 00:00:35,695 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 803
[2019-10-15 00:00:35,695 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-15 00:00:35,698 INFO  L380         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-10-15 00:00:35,700 INFO  L410      AbstractCegarLoop]: === Iteration 1 === [calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-15 00:00:35,706 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-15 00:00:35,707 INFO  L82        PathProgramCache]: Analyzing trace with hash 654454747, now seen corresponding path program 1 times
[2019-10-15 00:00:35,717 INFO  L157   tionRefinementEngine]: Executing refinement strategy TAIPAN
[2019-10-15 00:00:35,718 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046939174]
[2019-10-15 00:00:35,718 INFO  L116   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-15 00:00:35,719 INFO  L116   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-15 00:00:35,719 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-15 00:00:36,158 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-15 00:00:37,574 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-10-15 00:00:37,575 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046939174]
[2019-10-15 00:00:37,576 INFO  L223   tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-10-15 00:00:37,576 INFO  L236   tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2019-10-15 00:00:37,576 INFO  L342   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787958075]
[2019-10-15 00:00:37,583 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 3 states
[2019-10-15 00:00:37,585 INFO  L137   tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN
[2019-10-15 00:00:37,597 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2019-10-15 00:00:37,597 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2019-10-15 00:00:37,599 INFO  L87              Difference]: Start difference. First operand 906 states. Second operand 3 states.
[2019-10-15 00:00:42,321 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-10-15 00:00:42,322 INFO  L93              Difference]: Finished difference Result 2644 states and 5099 transitions.
[2019-10-15 00:00:42,325 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2019-10-15 00:00:42,327 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 802
[2019-10-15 00:00:42,339 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-10-15 00:00:42,403 INFO  L225             Difference]: With dead ends: 2644
[2019-10-15 00:00:42,403 INFO  L226             Difference]: Without dead ends: 1676
[2019-10-15 00:00:42,421 INFO  L600         BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 5 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2019-10-15 00:00:42,453 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 1676 states.
[2019-10-15 00:00:42,621 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 1676 to 1676.
[2019-10-15 00:00:42,623 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 1676 states.
[2019-10-15 00:00:42,638 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 1676 states to 1676 states and 3124 transitions.
[2019-10-15 00:00:42,640 INFO  L78                 Accepts]: Start accepts. Automaton has 1676 states and 3124 transitions. Word has length 802
[2019-10-15 00:00:42,646 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-10-15 00:00:42,646 INFO  L462      AbstractCegarLoop]: Abstraction has 1676 states and 3124 transitions.
[2019-10-15 00:00:42,646 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2019-10-15 00:00:42,647 INFO  L276                IsEmpty]: Start isEmpty. Operand 1676 states and 3124 transitions.
[2019-10-15 00:00:42,687 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 811
[2019-10-15 00:00:42,687 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-15 00:00:42,688 INFO  L380         BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-10-15 00:00:42,688 INFO  L410      AbstractCegarLoop]: === Iteration 2 === [calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-15 00:00:42,689 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-15 00:00:42,690 INFO  L82        PathProgramCache]: Analyzing trace with hash -925553046, now seen corresponding path program 1 times
[2019-10-15 00:00:42,690 INFO  L157   tionRefinementEngine]: Executing refinement strategy TAIPAN
[2019-10-15 00:00:42,690 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072952107]
[2019-10-15 00:00:42,691 INFO  L116   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-15 00:00:42,691 INFO  L116   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-15 00:00:42,691 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-15 00:00:42,902 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-15 00:00:44,237 INFO  L134       CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-10-15 00:00:44,238 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072952107]
[2019-10-15 00:00:44,238 INFO  L223   tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-10-15 00:00:44,238 INFO  L236   tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2019-10-15 00:00:44,239 INFO  L342   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878645368]
[2019-10-15 00:00:44,242 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 4 states
[2019-10-15 00:00:44,242 INFO  L137   tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN
[2019-10-15 00:00:44,242 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2019-10-15 00:00:44,243 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2019-10-15 00:00:44,243 INFO  L87              Difference]: Start difference. First operand 1676 states and 3124 transitions. Second operand 4 states.
[2019-10-15 00:00:51,336 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-10-15 00:00:51,337 INFO  L93              Difference]: Finished difference Result 6682 states and 12604 transitions.
[2019-10-15 00:00:51,337 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2019-10-15 00:00:51,337 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 810
[2019-10-15 00:00:51,340 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-10-15 00:00:51,369 INFO  L225             Difference]: With dead ends: 6682
[2019-10-15 00:00:51,369 INFO  L226             Difference]: Without dead ends: 5012
[2019-10-15 00:00:51,375 INFO  L600         BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2019-10-15 00:00:51,381 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 5012 states.
[2019-10-15 00:00:51,544 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 5012 to 5012.
[2019-10-15 00:00:51,544 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 5012 states.
[2019-10-15 00:00:51,565 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5012 states to 5012 states and 8180 transitions.
[2019-10-15 00:00:51,566 INFO  L78                 Accepts]: Start accepts. Automaton has 5012 states and 8180 transitions. Word has length 810
[2019-10-15 00:00:51,567 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-10-15 00:00:51,568 INFO  L462      AbstractCegarLoop]: Abstraction has 5012 states and 8180 transitions.
[2019-10-15 00:00:51,568 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2019-10-15 00:00:51,568 INFO  L276                IsEmpty]: Start isEmpty. Operand 5012 states and 8180 transitions.
[2019-10-15 00:00:51,591 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 829
[2019-10-15 00:00:51,592 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-15 00:00:51,593 INFO  L380         BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-10-15 00:00:51,593 INFO  L410      AbstractCegarLoop]: === Iteration 3 === [calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-15 00:00:51,594 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-15 00:00:51,595 INFO  L82        PathProgramCache]: Analyzing trace with hash 1778434694, now seen corresponding path program 1 times
[2019-10-15 00:00:51,595 INFO  L157   tionRefinementEngine]: Executing refinement strategy TAIPAN
[2019-10-15 00:00:51,595 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676369245]
[2019-10-15 00:00:51,596 INFO  L116   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-15 00:00:51,596 INFO  L116   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-15 00:00:51,596 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-15 00:00:51,793 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-15 00:00:53,223 INFO  L134       CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-10-15 00:00:53,223 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676369245]
[2019-10-15 00:00:53,224 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973683470]
[2019-10-15 00:00:53,224 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
[2019-10-15 00:00:53,512 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-15 00:00:53,519 INFO  L256         TraceCheckSpWp]: Trace formula consists of 1152 conjuncts, 10 conjunts are in the unsatisfiable core
[2019-10-15 00:00:53,571 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
[2019-10-15 00:00:54,524 INFO  L134       CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-10-15 00:00:54,525 INFO  L321         TraceCheckSpWp]: Computing backward predicates...
[2019-10-15 00:00:55,150 INFO  L134       CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-10-15 00:00:55,150 INFO  L223   tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences.
[2019-10-15 00:00:55,151 INFO  L236   tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [7] total 8
[2019-10-15 00:00:55,152 INFO  L342   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405516064]
[2019-10-15 00:00:55,154 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 3 states
[2019-10-15 00:00:55,154 INFO  L137   tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN
[2019-10-15 00:00:55,155 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2019-10-15 00:00:55,155 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56
[2019-10-15 00:00:55,155 INFO  L87              Difference]: Start difference. First operand 5012 states and 8180 transitions. Second operand 3 states.