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_label50.c


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


This is Ultimate 0.1.24-13a467a-m
[2019-10-15 00:00:19,419 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2019-10-15 00:00:19,423 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2019-10-15 00:00:19,441 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2019-10-15 00:00:19,441 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2019-10-15 00:00:19,444 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2019-10-15 00:00:19,446 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2019-10-15 00:00:19,455 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2019-10-15 00:00:19,460 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2019-10-15 00:00:19,463 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
[2019-10-15 00:00:19,464 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
[2019-10-15 00:00:19,466 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2019-10-15 00:00:19,466 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2019-10-15 00:00:19,468 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2019-10-15 00:00:19,470 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2019-10-15 00:00:19,471 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2019-10-15 00:00:19,473 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2019-10-15 00:00:19,474 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2019-10-15 00:00:19,476 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2019-10-15 00:00:19,480 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2019-10-15 00:00:19,482 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2019-10-15 00:00:19,482 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2019-10-15 00:00:19,487 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2019-10-15 00:00:19,488 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2019-10-15 00:00:19,490 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2019-10-15 00:00:19,490 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2019-10-15 00:00:19,490 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2019-10-15 00:00:19,492 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2019-10-15 00:00:19,493 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2019-10-15 00:00:19,494 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2019-10-15 00:00:19,494 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2019-10-15 00:00:19,496 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2019-10-15 00:00:19,497 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2019-10-15 00:00:19,498 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2019-10-15 00:00:19,499 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2019-10-15 00:00:19,500 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
[2019-10-15 00:00:19,500 INFO  L184        SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2019-10-15 00:00:19,500 INFO  L184        SettingsManager]: ReqParser provides no preferences, ignoring...
[2019-10-15 00:00:19,501 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
[2019-10-15 00:00:19,502 INFO  L181        SettingsManager]: Resetting Witness Parser preferences to default values
[2019-10-15 00:00:19,503 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2019-10-15 00:00:19,504 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 00:00:19,537 INFO  L113        SettingsManager]: Loading preferences was successful
[2019-10-15 00:00:19,538 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2019-10-15 00:00:19,539 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2019-10-15 00:00:19,539 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2019-10-15 00:00:19,539 INFO  L138        SettingsManager]:  * Use SBE=true
[2019-10-15 00:00:19,539 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2019-10-15 00:00:19,540 INFO  L138        SettingsManager]:  * sizeof long=4
[2019-10-15 00:00:19,540 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2019-10-15 00:00:19,542 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2019-10-15 00:00:19,542 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2019-10-15 00:00:19,543 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2019-10-15 00:00:19,543 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2019-10-15 00:00:19,543 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2019-10-15 00:00:19,543 INFO  L138        SettingsManager]:  * sizeof long double=12
[2019-10-15 00:00:19,543 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2019-10-15 00:00:19,543 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2019-10-15 00:00:19,544 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2019-10-15 00:00:19,544 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2019-10-15 00:00:19,544 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2019-10-15 00:00:19,544 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2019-10-15 00:00:19,545 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2019-10-15 00:00:19,545 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2019-10-15 00:00:19,545 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2019-10-15 00:00:19,545 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2019-10-15 00:00:19,545 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2019-10-15 00:00:19,546 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2019-10-15 00:00:19,546 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2019-10-15 00:00:19,546 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2019-10-15 00:00:19,546 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 00:00:19,846 INFO  L81    nceAwareModelManager]: Repository-Root is: /tmp
[2019-10-15 00:00:19,860 INFO  L258   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2019-10-15 00:00:19,864 INFO  L214   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2019-10-15 00:00:19,865 INFO  L271        PluginConnector]: Initializing CDTParser...
[2019-10-15 00:00:19,866 INFO  L275        PluginConnector]: CDTParser initialized
[2019-10-15 00:00:19,867 INFO  L428   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem04_label50.c
[2019-10-15 00:00:19,931 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/74b39628d/4da2491b82534b83aa6bc6116b937839/FLAG1db038d34
[2019-10-15 00:00:20,805 INFO  L306              CDTParser]: Found 1 translation units.
[2019-10-15 00:00:20,806 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem04_label50.c
[2019-10-15 00:00:20,850 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/74b39628d/4da2491b82534b83aa6bc6116b937839/FLAG1db038d34
[2019-10-15 00:00:21,301 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/74b39628d/4da2491b82534b83aa6bc6116b937839
[2019-10-15 00:00:21,312 INFO  L296   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2019-10-15 00:00:21,314 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2019-10-15 00:00:21,315 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2019-10-15 00:00:21,316 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2019-10-15 00:00:21,320 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2019-10-15 00:00:21,321 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:00:21" (1/1) ...
[2019-10-15 00:00:21,324 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d5d6786 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:00:21, skipping insertion in model container
[2019-10-15 00:00:21,324 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:00:21" (1/1) ...
[2019-10-15 00:00:21,333 INFO  L142         MainTranslator]: Starting translation in SV-COMP mode 
[2019-10-15 00:00:21,491 INFO  L173         MainTranslator]: Built tables and reachable declarations
[2019-10-15 00:00:23,029 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2019-10-15 00:00:23,037 INFO  L188         MainTranslator]: Completed pre-run
[2019-10-15 00:00:23,791 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2019-10-15 00:00:23,828 INFO  L192         MainTranslator]: Completed translation
[2019-10-15 00:00:23,828 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:00:23 WrapperNode
[2019-10-15 00:00:23,828 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2019-10-15 00:00:23,829 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2019-10-15 00:00:23,829 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2019-10-15 00:00:23,830 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2019-10-15 00:00:23,845 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:00:23" (1/1) ...
[2019-10-15 00:00:23,845 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:00:23" (1/1) ...
[2019-10-15 00:00:23,908 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:00:23" (1/1) ...
[2019-10-15 00:00:23,909 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:00:23" (1/1) ...
[2019-10-15 00:00:24,032 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:00:23" (1/1) ...
[2019-10-15 00:00:24,061 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:00:23" (1/1) ...
[2019-10-15 00:00:24,085 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:00:23" (1/1) ...
[2019-10-15 00:00:24,110 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2019-10-15 00:00:24,111 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2019-10-15 00:00:24,111 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2019-10-15 00:00:24,112 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2019-10-15 00:00:24,113 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:00:23" (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 00:00:24,191 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2019-10-15 00:00:24,191 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2019-10-15 00:00:24,191 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output
[2019-10-15 00:00:24,191 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output2
[2019-10-15 00:00:24,192 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output3
[2019-10-15 00:00:24,192 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output4
[2019-10-15 00:00:24,192 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2019-10-15 00:00:24,192 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output
[2019-10-15 00:00:24,192 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output2
[2019-10-15 00:00:24,193 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output3
[2019-10-15 00:00:24,193 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output4
[2019-10-15 00:00:24,193 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2019-10-15 00:00:24,193 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int
[2019-10-15 00:00:24,194 INFO  L130     BoogieDeclarations]: Found specification of procedure exit
[2019-10-15 00:00:24,194 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2019-10-15 00:00:24,194 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2019-10-15 00:00:24,194 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2019-10-15 00:00:29,038 INFO  L279             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2019-10-15 00:00:29,039 INFO  L284             CfgBuilder]: Removed 1 assume(true) statements.
[2019-10-15 00:00:29,042 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:00:29 BoogieIcfgContainer
[2019-10-15 00:00:29,042 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2019-10-15 00:00:29,047 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2019-10-15 00:00:29,047 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2019-10-15 00:00:29,055 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2019-10-15 00:00:29,055 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 12:00:21" (1/3) ...
[2019-10-15 00:00:29,056 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@289efe90 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:00:29, skipping insertion in model container
[2019-10-15 00:00:29,056 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:00:23" (2/3) ...
[2019-10-15 00:00:29,057 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@289efe90 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:00:29, skipping insertion in model container
[2019-10-15 00:00:29,057 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:00:29" (3/3) ...
[2019-10-15 00:00:29,063 INFO  L109   eAbstractionObserver]: Analyzing ICFG Problem04_label50.c
[2019-10-15 00:00:29,076 INFO  L152   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2019-10-15 00:00:29,088 INFO  L164   ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2019-10-15 00:00:29,101 INFO  L249      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2019-10-15 00:00:29,151 INFO  L373      AbstractCegarLoop]: Interprodecural is true
[2019-10-15 00:00:29,151 INFO  L374      AbstractCegarLoop]: Hoare is true
[2019-10-15 00:00:29,152 INFO  L375      AbstractCegarLoop]: Compute interpolants for FPandBP
[2019-10-15 00:00:29,152 INFO  L376      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2019-10-15 00:00:29,152 INFO  L377      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2019-10-15 00:00:29,152 INFO  L378      AbstractCegarLoop]: Difference is false
[2019-10-15 00:00:29,152 INFO  L379      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2019-10-15 00:00:29,153 INFO  L383      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2019-10-15 00:00:29,202 INFO  L276                IsEmpty]: Start isEmpty. Operand 906 states.
[2019-10-15 00:00:29,258 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 829
[2019-10-15 00:00:29,259 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-15 00:00:29,261 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, 1, 1, 1]
[2019-10-15 00:00:29,263 INFO  L410      AbstractCegarLoop]: === Iteration 1 === [calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-15 00:00:29,268 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-15 00:00:29,270 INFO  L82        PathProgramCache]: Analyzing trace with hash 1347224739, now seen corresponding path program 1 times
[2019-10-15 00:00:29,277 INFO  L157   tionRefinementEngine]: Executing refinement strategy TAIPAN
[2019-10-15 00:00:29,277 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267610045]
[2019-10-15 00:00:29,278 INFO  L116   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-15 00:00:29,278 INFO  L116   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-15 00:00:29,278 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-15 00:00:29,740 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-15 00:00:31,226 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 00:00:31,227 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267610045]
[2019-10-15 00:00:31,228 INFO  L223   tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-10-15 00:00:31,228 INFO  L236   tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2019-10-15 00:00:31,229 INFO  L342   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865976360]
[2019-10-15 00:00:31,236 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 3 states
[2019-10-15 00:00:31,238 INFO  L137   tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN
[2019-10-15 00:00:31,250 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2019-10-15 00:00:31,251 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2019-10-15 00:00:31,252 INFO  L87              Difference]: Start difference. First operand 906 states. Second operand 3 states.
[2019-10-15 00:00:35,794 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-10-15 00:00:35,794 INFO  L93              Difference]: Finished difference Result 2644 states and 5099 transitions.
[2019-10-15 00:00:35,797 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2019-10-15 00:00:35,799 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 828
[2019-10-15 00:00:35,811 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-10-15 00:00:35,869 INFO  L225             Difference]: With dead ends: 2644
[2019-10-15 00:00:35,870 INFO  L226             Difference]: Without dead ends: 1676
[2019-10-15 00:00:35,889 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 00:00:35,924 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 1676 states.
[2019-10-15 00:00:36,114 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 1676 to 1676.
[2019-10-15 00:00:36,116 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 1676 states.
[2019-10-15 00:00:36,130 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 1676 states to 1676 states and 3124 transitions.
[2019-10-15 00:00:36,133 INFO  L78                 Accepts]: Start accepts. Automaton has 1676 states and 3124 transitions. Word has length 828
[2019-10-15 00:00:36,137 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-10-15 00:00:36,138 INFO  L462      AbstractCegarLoop]: Abstraction has 1676 states and 3124 transitions.
[2019-10-15 00:00:36,138 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2019-10-15 00:00:36,138 INFO  L276                IsEmpty]: Start isEmpty. Operand 1676 states and 3124 transitions.
[2019-10-15 00:00:36,192 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 837
[2019-10-15 00:00:36,192 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-15 00:00:36,194 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, 1, 1, 1]
[2019-10-15 00:00:36,194 INFO  L410      AbstractCegarLoop]: === Iteration 2 === [calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-15 00:00:36,195 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-15 00:00:36,196 INFO  L82        PathProgramCache]: Analyzing trace with hash -494477710, now seen corresponding path program 1 times
[2019-10-15 00:00:36,196 INFO  L157   tionRefinementEngine]: Executing refinement strategy TAIPAN
[2019-10-15 00:00:36,196 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407080392]
[2019-10-15 00:00:36,197 INFO  L116   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-15 00:00:36,197 INFO  L116   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-15 00:00:36,197 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-15 00:00:36,398 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-15 00:00:38,159 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 00:00:38,160 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407080392]
[2019-10-15 00:00:38,160 INFO  L223   tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-10-15 00:00:38,160 INFO  L236   tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2019-10-15 00:00:38,160 INFO  L342   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707193013]
[2019-10-15 00:00:38,164 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 4 states
[2019-10-15 00:00:38,164 INFO  L137   tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN
[2019-10-15 00:00:38,164 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2019-10-15 00:00:38,165 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2019-10-15 00:00:38,165 INFO  L87              Difference]: Start difference. First operand 1676 states and 3124 transitions. Second operand 4 states.
[2019-10-15 00:00:45,183 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-10-15 00:00:45,183 INFO  L93              Difference]: Finished difference Result 6682 states and 12604 transitions.
[2019-10-15 00:00:45,184 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2019-10-15 00:00:45,184 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 836
[2019-10-15 00:00:45,186 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-10-15 00:00:45,224 INFO  L225             Difference]: With dead ends: 6682
[2019-10-15 00:00:45,224 INFO  L226             Difference]: Without dead ends: 5012
[2019-10-15 00:00:45,231 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 00:00:45,238 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 5012 states.
[2019-10-15 00:00:45,401 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 5012 to 5012.
[2019-10-15 00:00:45,401 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 5012 states.
[2019-10-15 00:00:45,420 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5012 states to 5012 states and 8282 transitions.
[2019-10-15 00:00:45,421 INFO  L78                 Accepts]: Start accepts. Automaton has 5012 states and 8282 transitions. Word has length 836
[2019-10-15 00:00:45,423 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-10-15 00:00:45,423 INFO  L462      AbstractCegarLoop]: Abstraction has 5012 states and 8282 transitions.
[2019-10-15 00:00:45,423 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2019-10-15 00:00:45,424 INFO  L276                IsEmpty]: Start isEmpty. Operand 5012 states and 8282 transitions.
[2019-10-15 00:00:45,449 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 848
[2019-10-15 00:00:45,449 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-15 00:00:45,450 INFO  L380         BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-10-15 00:00:45,451 INFO  L410      AbstractCegarLoop]: === Iteration 3 === [calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-15 00:00:45,452 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-15 00:00:45,453 INFO  L82        PathProgramCache]: Analyzing trace with hash 1286235444, now seen corresponding path program 1 times
[2019-10-15 00:00:45,453 INFO  L157   tionRefinementEngine]: Executing refinement strategy TAIPAN
[2019-10-15 00:00:45,454 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817010106]
[2019-10-15 00:00:45,454 INFO  L116   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-15 00:00:45,454 INFO  L116   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-15 00:00:45,454 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-15 00:00:45,653 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-15 00:00:47,437 INFO  L134       CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked.
[2019-10-15 00:00:47,437 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817010106]
[2019-10-15 00:00:47,437 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251681833]
[2019-10-15 00:00:47,438 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 00:00:47,729 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-15 00:00:47,733 INFO  L256         TraceCheckSpWp]: Trace formula consists of 1170 conjuncts, 10 conjunts are in the unsatisfiable core
[2019-10-15 00:00:47,769 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
[2019-10-15 00:00:48,821 INFO  L134       CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-10-15 00:00:48,821 INFO  L321         TraceCheckSpWp]: Computing backward predicates...
[2019-10-15 00:00:49,408 INFO  L134       CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-10-15 00:00:49,409 INFO  L223   tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences.
[2019-10-15 00:00:49,409 INFO  L236   tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4] total 6
[2019-10-15 00:00:49,409 INFO  L342   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647128716]
[2019-10-15 00:00:49,412 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 4 states
[2019-10-15 00:00:49,412 INFO  L137   tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN
[2019-10-15 00:00:49,412 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2019-10-15 00:00:49,413 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30
[2019-10-15 00:00:49,413 INFO  L87              Difference]: Start difference. First operand 5012 states and 8282 transitions. Second operand 4 states.