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 -i ../../../trunk/examples/svcomp/eca-rers2012/Problem04_label22.c


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This is Ultimate 0.1.24-13a467a-m
[2019-10-14 21:55:27,002 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2019-10-14 21:55:27,004 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2019-10-14 21:55:27,020 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2019-10-14 21:55:27,020 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2019-10-14 21:55:27,022 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2019-10-14 21:55:27,025 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
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[2019-10-14 21:55:27,052 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2019-10-14 21:55:27,053 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2019-10-14 21:55:27,055 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2019-10-14 21:55:27,059 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2019-10-14 21:55:27,062 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2019-10-14 21:55:27,064 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2019-10-14 21:55:27,065 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
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[2019-10-14 21:55:27,071 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
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[2019-10-14 21:55:27,071 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
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[2019-10-14 21:55:27,079 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
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[2019-10-14 21:55:27,081 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2019-10-14 21:55:27,082 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
[2019-10-14 21:55:27,096 INFO  L113        SettingsManager]: Loading preferences was successful
[2019-10-14 21:55:27,096 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2019-10-14 21:55:27,097 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2019-10-14 21:55:27,097 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2019-10-14 21:55:27,098 INFO  L138        SettingsManager]:  * Use SBE=true
[2019-10-14 21:55:27,098 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2019-10-14 21:55:27,098 INFO  L138        SettingsManager]:  * sizeof long=4
[2019-10-14 21:55:27,098 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2019-10-14 21:55:27,098 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2019-10-14 21:55:27,099 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2019-10-14 21:55:27,099 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2019-10-14 21:55:27,099 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2019-10-14 21:55:27,099 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2019-10-14 21:55:27,099 INFO  L138        SettingsManager]:  * sizeof long double=12
[2019-10-14 21:55:27,100 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2019-10-14 21:55:27,100 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2019-10-14 21:55:27,100 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2019-10-14 21:55:27,100 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2019-10-14 21:55:27,100 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2019-10-14 21:55:27,101 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2019-10-14 21:55:27,101 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2019-10-14 21:55:27,101 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2019-10-14 21:55:27,101 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2019-10-14 21:55:27,102 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2019-10-14 21:55:27,102 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2019-10-14 21:55:27,102 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2019-10-14 21:55:27,102 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2019-10-14 21:55:27,102 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2019-10-14 21:55:27,102 INFO  L138        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2019-10-14 21:55:27,392 INFO  L81    nceAwareModelManager]: Repository-Root is: /tmp
[2019-10-14 21:55:27,405 INFO  L258   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2019-10-14 21:55:27,408 INFO  L214   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2019-10-14 21:55:27,409 INFO  L271        PluginConnector]: Initializing CDTParser...
[2019-10-14 21:55:27,410 INFO  L275        PluginConnector]: CDTParser initialized
[2019-10-14 21:55:27,411 INFO  L428   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem04_label22.c
[2019-10-14 21:55:27,472 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/36ddbdee5/10d46abf84c14e4080409ee6c0ce37ed/FLAGc22a649d4
[2019-10-14 21:55:28,246 INFO  L306              CDTParser]: Found 1 translation units.
[2019-10-14 21:55:28,247 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem04_label22.c
[2019-10-14 21:55:28,281 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/36ddbdee5/10d46abf84c14e4080409ee6c0ce37ed/FLAGc22a649d4
[2019-10-14 21:55:28,717 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/36ddbdee5/10d46abf84c14e4080409ee6c0ce37ed
[2019-10-14 21:55:28,726 INFO  L296   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2019-10-14 21:55:28,728 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2019-10-14 21:55:28,729 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2019-10-14 21:55:28,729 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2019-10-14 21:55:28,733 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2019-10-14 21:55:28,734 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:55:28" (1/1) ...
[2019-10-14 21:55:28,737 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7dd45ec6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:55:28, skipping insertion in model container
[2019-10-14 21:55:28,737 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:55:28" (1/1) ...
[2019-10-14 21:55:28,746 INFO  L142         MainTranslator]: Starting translation in SV-COMP mode 
[2019-10-14 21:55:28,943 INFO  L173         MainTranslator]: Built tables and reachable declarations
[2019-10-14 21:55:30,486 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2019-10-14 21:55:30,500 INFO  L188         MainTranslator]: Completed pre-run
[2019-10-14 21:55:31,371 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2019-10-14 21:55:31,410 INFO  L192         MainTranslator]: Completed translation
[2019-10-14 21:55:31,411 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:55:31 WrapperNode
[2019-10-14 21:55:31,412 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2019-10-14 21:55:31,412 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2019-10-14 21:55:31,413 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2019-10-14 21:55:31,413 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2019-10-14 21:55:31,428 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:55:31" (1/1) ...
[2019-10-14 21:55:31,428 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:55:31" (1/1) ...
[2019-10-14 21:55:31,481 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:55:31" (1/1) ...
[2019-10-14 21:55:31,483 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:55:31" (1/1) ...
[2019-10-14 21:55:31,578 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:55:31" (1/1) ...
[2019-10-14 21:55:31,615 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:55:31" (1/1) ...
[2019-10-14 21:55:31,638 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:55:31" (1/1) ...
[2019-10-14 21:55:31,666 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2019-10-14 21:55:31,667 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2019-10-14 21:55:31,667 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2019-10-14 21:55:31,667 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2019-10-14 21:55:31,668 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:55:31" (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
[2019-10-14 21:55:31,730 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2019-10-14 21:55:31,731 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2019-10-14 21:55:31,731 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output
[2019-10-14 21:55:31,731 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output2
[2019-10-14 21:55:31,731 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output3
[2019-10-14 21:55:31,732 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output4
[2019-10-14 21:55:31,732 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2019-10-14 21:55:31,732 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output
[2019-10-14 21:55:31,732 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output2
[2019-10-14 21:55:31,733 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output3
[2019-10-14 21:55:31,733 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output4
[2019-10-14 21:55:31,733 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2019-10-14 21:55:31,733 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int
[2019-10-14 21:55:31,733 INFO  L130     BoogieDeclarations]: Found specification of procedure exit
[2019-10-14 21:55:31,734 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2019-10-14 21:55:31,734 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2019-10-14 21:55:31,734 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2019-10-14 21:55:36,242 INFO  L279             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2019-10-14 21:55:36,243 INFO  L284             CfgBuilder]: Removed 1 assume(true) statements.
[2019-10-14 21:55:36,245 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:55:36 BoogieIcfgContainer
[2019-10-14 21:55:36,245 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2019-10-14 21:55:36,247 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2019-10-14 21:55:36,247 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2019-10-14 21:55:36,251 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2019-10-14 21:55:36,252 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 09:55:28" (1/3) ...
[2019-10-14 21:55:36,253 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7bc9372 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:55:36, skipping insertion in model container
[2019-10-14 21:55:36,253 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:55:31" (2/3) ...
[2019-10-14 21:55:36,254 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7bc9372 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:55:36, skipping insertion in model container
[2019-10-14 21:55:36,254 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:55:36" (3/3) ...
[2019-10-14 21:55:36,256 INFO  L109   eAbstractionObserver]: Analyzing ICFG Problem04_label22.c
[2019-10-14 21:55:36,269 INFO  L152   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2019-10-14 21:55:36,280 INFO  L164   ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2019-10-14 21:55:36,294 INFO  L249      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2019-10-14 21:55:36,332 INFO  L373      AbstractCegarLoop]: Interprodecural is true
[2019-10-14 21:55:36,333 INFO  L374      AbstractCegarLoop]: Hoare is true
[2019-10-14 21:55:36,333 INFO  L375      AbstractCegarLoop]: Compute interpolants for FPandBP
[2019-10-14 21:55:36,333 INFO  L376      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2019-10-14 21:55:36,333 INFO  L377      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2019-10-14 21:55:36,333 INFO  L378      AbstractCegarLoop]: Difference is false
[2019-10-14 21:55:36,334 INFO  L379      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2019-10-14 21:55:36,334 INFO  L383      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2019-10-14 21:55:36,375 INFO  L276                IsEmpty]: Start isEmpty. Operand 906 states.
[2019-10-14 21:55:36,444 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 826
[2019-10-14 21:55:36,444 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-14 21:55:36,447 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-10-14 21:55:36,449 INFO  L410      AbstractCegarLoop]: === Iteration 1 === [calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-14 21:55:36,455 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-14 21:55:36,456 INFO  L82        PathProgramCache]: Analyzing trace with hash -356631422, now seen corresponding path program 1 times
[2019-10-14 21:55:36,465 INFO  L157   tionRefinementEngine]: Executing refinement strategy CAMEL
[2019-10-14 21:55:36,465 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975419389]
[2019-10-14 21:55:36,466 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-14 21:55:36,466 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-14 21:55:36,466 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-14 21:55:36,963 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 21:55:38,051 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 21:55:38,981 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-10-14 21:55:38,982 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975419389]
[2019-10-14 21:55:38,982 INFO  L223   tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-10-14 21:55:38,983 INFO  L236   tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2019-10-14 21:55:38,983 INFO  L342   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138343173]
[2019-10-14 21:55:38,990 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 5 states
[2019-10-14 21:55:38,991 INFO  L137   tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-10-14 21:55:39,005 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2019-10-14 21:55:39,006 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20
[2019-10-14 21:55:39,008 INFO  L87              Difference]: Start difference. First operand 906 states. Second operand 5 states.
[2019-10-14 21:55:47,465 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-10-14 21:55:47,466 INFO  L93              Difference]: Finished difference Result 2672 states and 5137 transitions.
[2019-10-14 21:55:47,468 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2019-10-14 21:55:47,469 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 825
[2019-10-14 21:55:47,479 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-10-14 21:55:47,512 INFO  L225             Difference]: With dead ends: 2672
[2019-10-14 21:55:47,512 INFO  L226             Difference]: Without dead ends: 1702
[2019-10-14 21:55:47,522 INFO  L600         BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 6 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30
[2019-10-14 21:55:47,556 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 1702 states.
[2019-10-14 21:55:47,671 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 1702 to 1689.
[2019-10-14 21:55:47,673 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 1689 states.
[2019-10-14 21:55:47,688 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 1689 states to 1689 states and 3029 transitions.
[2019-10-14 21:55:47,690 INFO  L78                 Accepts]: Start accepts. Automaton has 1689 states and 3029 transitions. Word has length 825
[2019-10-14 21:55:47,693 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-10-14 21:55:47,693 INFO  L462      AbstractCegarLoop]: Abstraction has 1689 states and 3029 transitions.
[2019-10-14 21:55:47,693 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2019-10-14 21:55:47,693 INFO  L276                IsEmpty]: Start isEmpty. Operand 1689 states and 3029 transitions.
[2019-10-14 21:55:47,726 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 834
[2019-10-14 21:55:47,726 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-14 21:55:47,727 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-10-14 21:55:47,727 INFO  L410      AbstractCegarLoop]: === Iteration 2 === [calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-14 21:55:47,728 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-14 21:55:47,728 INFO  L82        PathProgramCache]: Analyzing trace with hash -1387508461, now seen corresponding path program 1 times
[2019-10-14 21:55:47,728 INFO  L157   tionRefinementEngine]: Executing refinement strategy CAMEL
[2019-10-14 21:55:47,729 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311529755]
[2019-10-14 21:55:47,729 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-14 21:55:47,729 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-14 21:55:47,729 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-14 21:55:47,904 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 21:55:48,559 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 21:55:48,584 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 21:55:49,454 INFO  L134       CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-10-14 21:55:49,455 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311529755]
[2019-10-14 21:55:49,455 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444331622]
[2019-10-14 21:55:49,456 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
[2019-10-14 21:55:49,745 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 21:55:49,751 INFO  L256         TraceCheckSpWp]: Trace formula consists of 1153 conjuncts, 10 conjunts are in the unsatisfiable core
[2019-10-14 21:55:49,788 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
[2019-10-14 21:55:50,717 INFO  L134       CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-10-14 21:55:50,717 INFO  L223   tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences.
[2019-10-14 21:55:50,718 INFO  L236   tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9
[2019-10-14 21:55:50,718 INFO  L342   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728757688]
[2019-10-14 21:55:50,722 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 3 states
[2019-10-14 21:55:50,722 INFO  L137   tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-10-14 21:55:50,723 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2019-10-14 21:55:50,723 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72
[2019-10-14 21:55:50,723 INFO  L87              Difference]: Start difference. First operand 1689 states and 3029 transitions. Second operand 3 states.
[2019-10-14 21:55:55,115 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-10-14 21:55:55,117 INFO  L93              Difference]: Finished difference Result 5053 states and 9124 transitions.
[2019-10-14 21:55:55,117 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2019-10-14 21:55:55,117 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 833
[2019-10-14 21:55:55,119 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-10-14 21:55:55,140 INFO  L225             Difference]: With dead ends: 5053
[2019-10-14 21:55:55,140 INFO  L226             Difference]: Without dead ends: 3370
[2019-10-14 21:55:55,146 INFO  L600         BasicCegarLoop]: 0 DeclaredPredicates, 846 GetRequests, 838 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72
[2019-10-14 21:55:55,151 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 3370 states.
[2019-10-14 21:55:55,230 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 3370 to 3370.
[2019-10-14 21:55:55,230 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 3370 states.
[2019-10-14 21:55:55,246 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 3370 states to 3370 states and 5276 transitions.
[2019-10-14 21:55:55,247 INFO  L78                 Accepts]: Start accepts. Automaton has 3370 states and 5276 transitions. Word has length 833
[2019-10-14 21:55:55,249 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-10-14 21:55:55,249 INFO  L462      AbstractCegarLoop]: Abstraction has 3370 states and 5276 transitions.
[2019-10-14 21:55:55,249 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2019-10-14 21:55:55,250 INFO  L276                IsEmpty]: Start isEmpty. Operand 3370 states and 5276 transitions.
[2019-10-14 21:55:55,295 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 841
[2019-10-14 21:55:55,295 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-14 21:55:55,297 INFO  L380         BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-10-14 21:55:55,502 WARN  L499      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2019-10-14 21:55:55,503 INFO  L410      AbstractCegarLoop]: === Iteration 3 === [calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-14 21:55:55,503 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-14 21:55:55,504 INFO  L82        PathProgramCache]: Analyzing trace with hash 692837641, now seen corresponding path program 1 times
[2019-10-14 21:55:55,504 INFO  L157   tionRefinementEngine]: Executing refinement strategy CAMEL
[2019-10-14 21:55:55,504 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792713587]
[2019-10-14 21:55:55,505 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-14 21:55:55,505 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-14 21:55:55,505 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-14 21:55:55,589 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 21:55:55,864 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 21:55:55,907 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 21:55:56,459 INFO  L134       CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-10-14 21:55:56,460 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792713587]
[2019-10-14 21:55:56,460 INFO  L223   tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-10-14 21:55:56,461 INFO  L236   tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2019-10-14 21:55:56,462 INFO  L342   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879490887]
[2019-10-14 21:55:56,464 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 8 states
[2019-10-14 21:55:56,465 INFO  L137   tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-10-14 21:55:56,465 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2019-10-14 21:55:56,466 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56
[2019-10-14 21:55:56,466 INFO  L87              Difference]: Start difference. First operand 3370 states and 5276 transitions. Second operand 8 states.