/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/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_label41.c


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


This is Ultimate 0.1.24-fb55353
[2019-11-06 22:40:33,449 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2019-11-06 22:40:33,451 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2019-11-06 22:40:33,468 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2019-11-06 22:40:33,469 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2019-11-06 22:40:33,470 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2019-11-06 22:40:33,472 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2019-11-06 22:40:33,476 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2019-11-06 22:40:33,482 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2019-11-06 22:40:33,483 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
[2019-11-06 22:40:33,483 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
[2019-11-06 22:40:33,484 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2019-11-06 22:40:33,485 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2019-11-06 22:40:33,486 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2019-11-06 22:40:33,486 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2019-11-06 22:40:33,488 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2019-11-06 22:40:33,488 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2019-11-06 22:40:33,489 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2019-11-06 22:40:33,491 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2019-11-06 22:40:33,492 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2019-11-06 22:40:33,494 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2019-11-06 22:40:33,494 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2019-11-06 22:40:33,495 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2019-11-06 22:40:33,496 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2019-11-06 22:40:33,498 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2019-11-06 22:40:33,498 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2019-11-06 22:40:33,499 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
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[2019-11-06 22:40:33,500 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
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[2019-11-06 22:40:33,501 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2019-11-06 22:40:33,502 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2019-11-06 22:40:33,502 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2019-11-06 22:40:33,503 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2019-11-06 22:40:33,504 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2019-11-06 22:40:33,504 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
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[2019-11-06 22:40:33,505 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
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[2019-11-06 22:40:33,507 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2019-11-06 22:40:33,507 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
[2019-11-06 22:40:33,522 INFO  L113        SettingsManager]: Loading preferences was successful
[2019-11-06 22:40:33,523 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2019-11-06 22:40:33,524 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2019-11-06 22:40:33,524 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2019-11-06 22:40:33,524 INFO  L138        SettingsManager]:  * Use SBE=true
[2019-11-06 22:40:33,524 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2019-11-06 22:40:33,525 INFO  L138        SettingsManager]:  * sizeof long=4
[2019-11-06 22:40:33,525 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2019-11-06 22:40:33,525 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2019-11-06 22:40:33,525 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2019-11-06 22:40:33,525 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2019-11-06 22:40:33,526 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2019-11-06 22:40:33,526 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2019-11-06 22:40:33,526 INFO  L138        SettingsManager]:  * sizeof long double=12
[2019-11-06 22:40:33,526 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2019-11-06 22:40:33,526 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2019-11-06 22:40:33,526 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2019-11-06 22:40:33,527 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2019-11-06 22:40:33,527 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2019-11-06 22:40:33,527 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2019-11-06 22:40:33,527 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2019-11-06 22:40:33,527 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2019-11-06 22:40:33,528 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2019-11-06 22:40:33,528 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2019-11-06 22:40:33,528 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2019-11-06 22:40:33,528 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2019-11-06 22:40:33,528 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2019-11-06 22:40:33,529 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2019-11-06 22:40:33,529 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
[2019-11-06 22:40:33,802 INFO  L81    nceAwareModelManager]: Repository-Root is: /tmp
[2019-11-06 22:40:33,814 INFO  L258   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2019-11-06 22:40:33,817 INFO  L214   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2019-11-06 22:40:33,819 INFO  L271        PluginConnector]: Initializing CDTParser...
[2019-11-06 22:40:33,819 INFO  L275        PluginConnector]: CDTParser initialized
[2019-11-06 22:40:33,820 INFO  L428   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem04_label41.c
[2019-11-06 22:40:33,892 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/48ade5d90/ac0e64e640904d37a4b43d2c3d975910/FLAG42b2b7158
[2019-11-06 22:40:34,649 INFO  L306              CDTParser]: Found 1 translation units.
[2019-11-06 22:40:34,650 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem04_label41.c
[2019-11-06 22:40:34,683 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/48ade5d90/ac0e64e640904d37a4b43d2c3d975910/FLAG42b2b7158
[2019-11-06 22:40:34,707 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/48ade5d90/ac0e64e640904d37a4b43d2c3d975910
[2019-11-06 22:40:34,719 INFO  L296   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2019-11-06 22:40:34,721 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2019-11-06 22:40:34,723 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2019-11-06 22:40:34,723 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2019-11-06 22:40:34,727 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2019-11-06 22:40:34,728 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:40:34" (1/1) ...
[2019-11-06 22:40:34,731 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@50d8125c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:40:34, skipping insertion in model container
[2019-11-06 22:40:34,731 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:40:34" (1/1) ...
[2019-11-06 22:40:34,741 INFO  L142         MainTranslator]: Starting translation in SV-COMP mode 
[2019-11-06 22:40:34,934 INFO  L173         MainTranslator]: Built tables and reachable declarations
[2019-11-06 22:40:36,327 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2019-11-06 22:40:36,339 INFO  L188         MainTranslator]: Completed pre-run
[2019-11-06 22:40:37,064 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2019-11-06 22:40:37,096 INFO  L192         MainTranslator]: Completed translation
[2019-11-06 22:40:37,097 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:40:37 WrapperNode
[2019-11-06 22:40:37,097 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2019-11-06 22:40:37,098 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2019-11-06 22:40:37,098 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2019-11-06 22:40:37,098 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2019-11-06 22:40:37,113 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:40:37" (1/1) ...
[2019-11-06 22:40:37,114 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:40:37" (1/1) ...
[2019-11-06 22:40:37,171 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:40:37" (1/1) ...
[2019-11-06 22:40:37,173 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:40:37" (1/1) ...
[2019-11-06 22:40:37,271 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:40:37" (1/1) ...
[2019-11-06 22:40:37,308 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:40:37" (1/1) ...
[2019-11-06 22:40:37,332 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:40:37" (1/1) ...
[2019-11-06 22:40:37,358 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2019-11-06 22:40:37,359 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2019-11-06 22:40:37,359 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2019-11-06 22:40:37,360 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2019-11-06 22:40:37,361 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:40:37" (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
[2019-11-06 22:40:37,425 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2019-11-06 22:40:37,426 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2019-11-06 22:40:37,426 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output
[2019-11-06 22:40:37,426 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output2
[2019-11-06 22:40:37,426 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output3
[2019-11-06 22:40:37,426 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output4
[2019-11-06 22:40:37,427 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2019-11-06 22:40:37,427 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output
[2019-11-06 22:40:37,427 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output2
[2019-11-06 22:40:37,428 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output3
[2019-11-06 22:40:37,428 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output4
[2019-11-06 22:40:37,428 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2019-11-06 22:40:37,428 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int
[2019-11-06 22:40:37,429 INFO  L130     BoogieDeclarations]: Found specification of procedure exit
[2019-11-06 22:40:37,429 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2019-11-06 22:40:37,430 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2019-11-06 22:40:37,431 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2019-11-06 22:40:41,913 INFO  L279             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2019-11-06 22:40:41,913 INFO  L284             CfgBuilder]: Removed 1 assume(true) statements.
[2019-11-06 22:40:41,918 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:40:41 BoogieIcfgContainer
[2019-11-06 22:40:41,918 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2019-11-06 22:40:41,920 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2019-11-06 22:40:41,920 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2019-11-06 22:40:41,924 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2019-11-06 22:40:41,925 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:40:34" (1/3) ...
[2019-11-06 22:40:41,926 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e96f28c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:40:41, skipping insertion in model container
[2019-11-06 22:40:41,926 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:40:37" (2/3) ...
[2019-11-06 22:40:41,928 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e96f28c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:40:41, skipping insertion in model container
[2019-11-06 22:40:41,929 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:40:41" (3/3) ...
[2019-11-06 22:40:41,934 INFO  L109   eAbstractionObserver]: Analyzing ICFG Problem04_label41.c
[2019-11-06 22:40:41,953 INFO  L152   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2019-11-06 22:40:41,966 INFO  L164   ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2019-11-06 22:40:41,983 INFO  L249      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2019-11-06 22:40:42,036 INFO  L373      AbstractCegarLoop]: Interprodecural is true
[2019-11-06 22:40:42,036 INFO  L374      AbstractCegarLoop]: Hoare is true
[2019-11-06 22:40:42,036 INFO  L375      AbstractCegarLoop]: Compute interpolants for FPandBP
[2019-11-06 22:40:42,036 INFO  L376      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2019-11-06 22:40:42,037 INFO  L377      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2019-11-06 22:40:42,037 INFO  L378      AbstractCegarLoop]: Difference is false
[2019-11-06 22:40:42,037 INFO  L379      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2019-11-06 22:40:42,037 INFO  L383      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2019-11-06 22:40:42,090 INFO  L276                IsEmpty]: Start isEmpty. Operand 906 states.
[2019-11-06 22:40:42,170 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 824
[2019-11-06 22:40:42,171 INFO  L402         BasicCegarLoop]: Found error trace
[2019-11-06 22:40:42,173 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-11-06 22:40:42,176 INFO  L410      AbstractCegarLoop]: === Iteration 1 === [calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-11-06 22:40:42,182 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-11-06 22:40:42,184 INFO  L82        PathProgramCache]: Analyzing trace with hash -2114335398, now seen corresponding path program 1 times
[2019-11-06 22:40:42,198 INFO  L161   FreeRefinementEngine]: Executing refinement strategy TAIPAN
[2019-11-06 22:40:42,198 INFO  L337   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554554344]
[2019-11-06 22:40:42,199 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-11-06 22:40:42,777 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-06 22:40:44,411 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-11-06 22:40:44,412 INFO  L337   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554554344]
[2019-11-06 22:40:44,413 INFO  L218   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-11-06 22:40:44,413 INFO  L231   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2019-11-06 22:40:44,415 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231198191]
[2019-11-06 22:40:44,421 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 3 states
[2019-11-06 22:40:44,423 INFO  L141   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN
[2019-11-06 22:40:44,438 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2019-11-06 22:40:44,439 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2019-11-06 22:40:44,442 INFO  L87              Difference]: Start difference. First operand 906 states. Second operand 3 states.
[2019-11-06 22:40:49,480 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-11-06 22:40:49,480 INFO  L93              Difference]: Finished difference Result 2644 states and 5099 transitions.
[2019-11-06 22:40:49,482 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2019-11-06 22:40:49,483 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 823
[2019-11-06 22:40:49,488 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-11-06 22:40:49,524 INFO  L225             Difference]: With dead ends: 2644
[2019-11-06 22:40:49,524 INFO  L226             Difference]: Without dead ends: 1676
[2019-11-06 22:40:49,536 INFO  L630         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
[2019-11-06 22:40:49,558 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 1676 states.
[2019-11-06 22:40:49,679 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 1676 to 1676.
[2019-11-06 22:40:49,681 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 1676 states.
[2019-11-06 22:40:49,690 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 1676 states to 1676 states and 2968 transitions.
[2019-11-06 22:40:49,692 INFO  L78                 Accepts]: Start accepts. Automaton has 1676 states and 2968 transitions. Word has length 823
[2019-11-06 22:40:49,694 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-11-06 22:40:49,694 INFO  L462      AbstractCegarLoop]: Abstraction has 1676 states and 2968 transitions.
[2019-11-06 22:40:49,695 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2019-11-06 22:40:49,695 INFO  L276                IsEmpty]: Start isEmpty. Operand 1676 states and 2968 transitions.
[2019-11-06 22:40:49,721 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 839
[2019-11-06 22:40:49,721 INFO  L402         BasicCegarLoop]: Found error trace
[2019-11-06 22:40:49,722 INFO  L410         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]
[2019-11-06 22:40:49,722 INFO  L410      AbstractCegarLoop]: === Iteration 2 === [calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-11-06 22:40:49,723 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-11-06 22:40:49,723 INFO  L82        PathProgramCache]: Analyzing trace with hash 112452513, now seen corresponding path program 1 times
[2019-11-06 22:40:49,723 INFO  L161   FreeRefinementEngine]: Executing refinement strategy TAIPAN
[2019-11-06 22:40:49,724 INFO  L337   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524284190]
[2019-11-06 22:40:49,724 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-11-06 22:40:49,803 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-06 22:40:50,580 INFO  L134       CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-11-06 22:40:50,580 INFO  L337   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524284190]
[2019-11-06 22:40:50,580 INFO  L218   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-11-06 22:40:50,581 INFO  L231   FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6
[2019-11-06 22:40:50,581 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670409658]
[2019-11-06 22:40:50,584 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 6 states
[2019-11-06 22:40:50,584 INFO  L141   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN
[2019-11-06 22:40:50,584 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2019-11-06 22:40:50,585 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30
[2019-11-06 22:40:50,585 INFO  L87              Difference]: Start difference. First operand 1676 states and 2968 transitions. Second operand 6 states.
[2019-11-06 22:40:57,006 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-11-06 22:40:57,006 INFO  L93              Difference]: Finished difference Result 5125 states and 9149 transitions.
[2019-11-06 22:40:57,006 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. 
[2019-11-06 22:40:57,007 INFO  L78                 Accepts]: Start accepts. Automaton has 6 states. Word has length 838
[2019-11-06 22:40:57,007 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-11-06 22:40:57,029 INFO  L225             Difference]: With dead ends: 5125
[2019-11-06 22:40:57,029 INFO  L226             Difference]: Without dead ends: 3455
[2019-11-06 22:40:57,034 INFO  L630         BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72
[2019-11-06 22:40:57,039 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 3455 states.
[2019-11-06 22:40:57,151 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 3455 to 3395.
[2019-11-06 22:40:57,151 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 3395 states.
[2019-11-06 22:40:57,163 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 3395 states to 3395 states and 5897 transitions.
[2019-11-06 22:40:57,164 INFO  L78                 Accepts]: Start accepts. Automaton has 3395 states and 5897 transitions. Word has length 838
[2019-11-06 22:40:57,164 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-11-06 22:40:57,164 INFO  L462      AbstractCegarLoop]: Abstraction has 3395 states and 5897 transitions.
[2019-11-06 22:40:57,164 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 6 states.
[2019-11-06 22:40:57,164 INFO  L276                IsEmpty]: Start isEmpty. Operand 3395 states and 5897 transitions.
[2019-11-06 22:40:57,198 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 852
[2019-11-06 22:40:57,198 INFO  L402         BasicCegarLoop]: Found error trace
[2019-11-06 22:40:57,199 INFO  L410         BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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]
[2019-11-06 22:40:57,200 INFO  L410      AbstractCegarLoop]: === Iteration 3 === [calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-11-06 22:40:57,200 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-11-06 22:40:57,200 INFO  L82        PathProgramCache]: Analyzing trace with hash -1117102381, now seen corresponding path program 1 times
[2019-11-06 22:40:57,201 INFO  L161   FreeRefinementEngine]: Executing refinement strategy TAIPAN
[2019-11-06 22:40:57,201 INFO  L337   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536287979]
[2019-11-06 22:40:57,201 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-11-06 22:40:57,267 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-06 22:40:57,647 INFO  L134       CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-11-06 22:40:57,647 INFO  L337   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536287979]
[2019-11-06 22:40:57,648 INFO  L218   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-11-06 22:40:57,648 INFO  L231   FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6
[2019-11-06 22:40:57,648 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184602292]
[2019-11-06 22:40:57,650 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 6 states
[2019-11-06 22:40:57,650 INFO  L141   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN
[2019-11-06 22:40:57,650 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2019-11-06 22:40:57,651 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30
[2019-11-06 22:40:57,651 INFO  L87              Difference]: Start difference. First operand 3395 states and 5897 transitions. Second operand 6 states.
[2019-11-06 22:41:03,290 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-11-06 22:41:03,290 INFO  L93              Difference]: Finished difference Result 8634 states and 14906 transitions.
[2019-11-06 22:41:03,296 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2019-11-06 22:41:03,296 INFO  L78                 Accepts]: Start accepts. Automaton has 6 states. Word has length 851
[2019-11-06 22:41:03,297 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-11-06 22:41:03,325 INFO  L225             Difference]: With dead ends: 8634
[2019-11-06 22:41:03,325 INFO  L226             Difference]: Without dead ends: 5245
[2019-11-06 22:41:03,334 INFO  L630         BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72
[2019-11-06 22:41:03,340 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 5245 states.
[2019-11-06 22:41:03,500 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 5245 to 5216.
[2019-11-06 22:41:03,500 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 5216 states.
[2019-11-06 22:41:03,521 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5216 states to 5216 states and 7991 transitions.
[2019-11-06 22:41:03,521 INFO  L78                 Accepts]: Start accepts. Automaton has 5216 states and 7991 transitions. Word has length 851
[2019-11-06 22:41:03,521 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-11-06 22:41:03,522 INFO  L462      AbstractCegarLoop]: Abstraction has 5216 states and 7991 transitions.
[2019-11-06 22:41:03,522 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 6 states.
[2019-11-06 22:41:03,522 INFO  L276                IsEmpty]: Start isEmpty. Operand 5216 states and 7991 transitions.
[2019-11-06 22:41:03,547 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 858
[2019-11-06 22:41:03,547 INFO  L402         BasicCegarLoop]: Found error trace
[2019-11-06 22:41:03,549 INFO  L410         BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-11-06 22:41:03,549 INFO  L410      AbstractCegarLoop]: === Iteration 4 === [calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-11-06 22:41:03,550 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-11-06 22:41:03,550 INFO  L82        PathProgramCache]: Analyzing trace with hash 191005426, now seen corresponding path program 1 times
[2019-11-06 22:41:03,551 INFO  L161   FreeRefinementEngine]: Executing refinement strategy TAIPAN
[2019-11-06 22:41:03,551 INFO  L337   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394817928]
[2019-11-06 22:41:03,551 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-11-06 22:41:03,628 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-06 22:41:04,090 INFO  L134       CoverageAnalysis]: Checked inductivity of 43 backedges. 41 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-11-06 22:41:04,091 INFO  L337   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394817928]
[2019-11-06 22:41:04,091 INFO  L337   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410815777]
[2019-11-06 22:41:04,091 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
[2019-11-06 22:41:04,384 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-06 22:41:04,388 INFO  L256         TraceCheckSpWp]: Trace formula consists of 1241 conjuncts, 10 conjunts are in the unsatisfiable core
[2019-11-06 22:41:04,421 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
[2019-11-06 22:41:05,353 INFO  L134       CoverageAnalysis]: Checked inductivity of 43 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked.
[2019-11-06 22:41:05,353 INFO  L321         TraceCheckSpWp]: Computing backward predicates...
[2019-11-06 22:41:06,012 INFO  L134       CoverageAnalysis]: Checked inductivity of 43 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked.
[2019-11-06 22:41:06,012 INFO  L218   FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences.
[2019-11-06 22:41:06,013 INFO  L231   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 7
[2019-11-06 22:41:06,013 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739044167]
[2019-11-06 22:41:06,015 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 3 states
[2019-11-06 22:41:06,016 INFO  L141   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN
[2019-11-06 22:41:06,016 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2019-11-06 22:41:06,016 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42
[2019-11-06 22:41:06,016 INFO  L87              Difference]: Start difference. First operand 5216 states and 7991 transitions. Second operand 3 states.