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_label03.c


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This is Ultimate 0.1.24-13a467a-m
[2019-10-14 21:55:01,966 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2019-10-14 21:55:01,968 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2019-10-14 21:55:01,983 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2019-10-14 21:55:01,983 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2019-10-14 21:55:01,984 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
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[2019-10-14 21:55:01,997 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2019-10-14 21:55:01,998 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2019-10-14 21:55:01,999 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2019-10-14 21:55:02,001 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
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[2019-10-14 21:55:02,016 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
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[2019-10-14 21:55:02,017 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2019-10-14 21:55:02,018 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 21:55:02,032 INFO  L113        SettingsManager]: Loading preferences was successful
[2019-10-14 21:55:02,033 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2019-10-14 21:55:02,034 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2019-10-14 21:55:02,035 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2019-10-14 21:55:02,035 INFO  L138        SettingsManager]:  * Use SBE=true
[2019-10-14 21:55:02,035 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2019-10-14 21:55:02,035 INFO  L138        SettingsManager]:  * sizeof long=4
[2019-10-14 21:55:02,035 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2019-10-14 21:55:02,036 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2019-10-14 21:55:02,036 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2019-10-14 21:55:02,036 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2019-10-14 21:55:02,037 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2019-10-14 21:55:02,037 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2019-10-14 21:55:02,037 INFO  L138        SettingsManager]:  * sizeof long double=12
[2019-10-14 21:55:02,038 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2019-10-14 21:55:02,038 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2019-10-14 21:55:02,038 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2019-10-14 21:55:02,038 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2019-10-14 21:55:02,038 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2019-10-14 21:55:02,039 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2019-10-14 21:55:02,039 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2019-10-14 21:55:02,039 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2019-10-14 21:55:02,040 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2019-10-14 21:55:02,040 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2019-10-14 21:55:02,040 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2019-10-14 21:55:02,040 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2019-10-14 21:55:02,040 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2019-10-14 21:55:02,041 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2019-10-14 21:55:02,041 INFO  L138        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2019-10-14 21:55:02,358 INFO  L81    nceAwareModelManager]: Repository-Root is: /tmp
[2019-10-14 21:55:02,369 INFO  L258   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2019-10-14 21:55:02,373 INFO  L214   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2019-10-14 21:55:02,374 INFO  L271        PluginConnector]: Initializing CDTParser...
[2019-10-14 21:55:02,375 INFO  L275        PluginConnector]: CDTParser initialized
[2019-10-14 21:55:02,376 INFO  L428   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem04_label03.c
[2019-10-14 21:55:02,456 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7ff976c95/7fb34f8a42e84f409b165bd88913d64c/FLAGff2751534
[2019-10-14 21:55:03,241 INFO  L306              CDTParser]: Found 1 translation units.
[2019-10-14 21:55:03,242 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem04_label03.c
[2019-10-14 21:55:03,271 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7ff976c95/7fb34f8a42e84f409b165bd88913d64c/FLAGff2751534
[2019-10-14 21:55:03,330 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7ff976c95/7fb34f8a42e84f409b165bd88913d64c
[2019-10-14 21:55:03,343 INFO  L296   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2019-10-14 21:55:03,345 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2019-10-14 21:55:03,346 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2019-10-14 21:55:03,346 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2019-10-14 21:55:03,350 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2019-10-14 21:55:03,351 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:55:03" (1/1) ...
[2019-10-14 21:55:03,355 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@67690949 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:55:03, skipping insertion in model container
[2019-10-14 21:55:03,355 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:55:03" (1/1) ...
[2019-10-14 21:55:03,365 INFO  L142         MainTranslator]: Starting translation in SV-COMP mode 
[2019-10-14 21:55:03,526 INFO  L173         MainTranslator]: Built tables and reachable declarations
[2019-10-14 21:55:05,068 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2019-10-14 21:55:05,079 INFO  L188         MainTranslator]: Completed pre-run
[2019-10-14 21:55:05,858 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2019-10-14 21:55:05,903 INFO  L192         MainTranslator]: Completed translation
[2019-10-14 21:55:05,904 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:55:05 WrapperNode
[2019-10-14 21:55:05,904 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2019-10-14 21:55:05,905 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2019-10-14 21:55:05,905 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2019-10-14 21:55:05,906 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2019-10-14 21:55:05,921 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:55:05" (1/1) ...
[2019-10-14 21:55:05,921 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:55:05" (1/1) ...
[2019-10-14 21:55:05,984 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:55:05" (1/1) ...
[2019-10-14 21:55:05,986 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:55:05" (1/1) ...
[2019-10-14 21:55:06,093 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:55:05" (1/1) ...
[2019-10-14 21:55:06,131 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:55:05" (1/1) ...
[2019-10-14 21:55:06,170 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:55:05" (1/1) ...
[2019-10-14 21:55:06,215 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2019-10-14 21:55:06,215 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2019-10-14 21:55:06,215 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2019-10-14 21:55:06,216 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2019-10-14 21:55:06,217 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:55:05" (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 21:55:06,295 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2019-10-14 21:55:06,295 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2019-10-14 21:55:06,295 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output
[2019-10-14 21:55:06,295 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output2
[2019-10-14 21:55:06,296 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output3
[2019-10-14 21:55:06,296 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output4
[2019-10-14 21:55:06,296 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2019-10-14 21:55:06,296 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output
[2019-10-14 21:55:06,296 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output2
[2019-10-14 21:55:06,296 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output3
[2019-10-14 21:55:06,297 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output4
[2019-10-14 21:55:06,297 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2019-10-14 21:55:06,297 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int
[2019-10-14 21:55:06,298 INFO  L130     BoogieDeclarations]: Found specification of procedure exit
[2019-10-14 21:55:06,298 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2019-10-14 21:55:06,299 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2019-10-14 21:55:06,300 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2019-10-14 21:55:10,855 INFO  L279             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2019-10-14 21:55:10,856 INFO  L284             CfgBuilder]: Removed 1 assume(true) statements.
[2019-10-14 21:55:10,973 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:55:10 BoogieIcfgContainer
[2019-10-14 21:55:10,974 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2019-10-14 21:55:10,975 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2019-10-14 21:55:10,975 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2019-10-14 21:55:10,979 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2019-10-14 21:55:10,980 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 09:55:03" (1/3) ...
[2019-10-14 21:55:10,981 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f5edba7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:55:10, skipping insertion in model container
[2019-10-14 21:55:10,981 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:55:05" (2/3) ...
[2019-10-14 21:55:10,981 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f5edba7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:55:10, skipping insertion in model container
[2019-10-14 21:55:10,981 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:55:10" (3/3) ...
[2019-10-14 21:55:10,983 INFO  L109   eAbstractionObserver]: Analyzing ICFG Problem04_label03.c
[2019-10-14 21:55:10,994 INFO  L152   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2019-10-14 21:55:11,005 INFO  L164   ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2019-10-14 21:55:11,018 INFO  L249      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2019-10-14 21:55:11,053 INFO  L373      AbstractCegarLoop]: Interprodecural is true
[2019-10-14 21:55:11,053 INFO  L374      AbstractCegarLoop]: Hoare is true
[2019-10-14 21:55:11,053 INFO  L375      AbstractCegarLoop]: Compute interpolants for FPandBP
[2019-10-14 21:55:11,054 INFO  L376      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2019-10-14 21:55:11,054 INFO  L377      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2019-10-14 21:55:11,054 INFO  L378      AbstractCegarLoop]: Difference is false
[2019-10-14 21:55:11,054 INFO  L379      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2019-10-14 21:55:11,054 INFO  L383      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2019-10-14 21:55:11,091 INFO  L276                IsEmpty]: Start isEmpty. Operand 906 states.
[2019-10-14 21:55:11,132 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 798
[2019-10-14 21:55:11,132 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-14 21:55:11,134 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]
[2019-10-14 21:55:11,136 INFO  L410      AbstractCegarLoop]: === Iteration 1 === [calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-14 21:55:11,142 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-14 21:55:11,143 INFO  L82        PathProgramCache]: Analyzing trace with hash 998699090, now seen corresponding path program 1 times
[2019-10-14 21:55:11,153 INFO  L157   tionRefinementEngine]: Executing refinement strategy CAMEL
[2019-10-14 21:55:11,154 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55004672]
[2019-10-14 21:55:11,154 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-14 21:55:11,155 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-14 21:55:11,155 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-14 21:55:11,623 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 21:55:12,478 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 21:55:13,276 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 21:55:13,277 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55004672]
[2019-10-14 21:55:13,278 INFO  L223   tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-10-14 21:55:13,278 INFO  L236   tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2019-10-14 21:55:13,278 INFO  L342   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962472032]
[2019-10-14 21:55:13,284 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 5 states
[2019-10-14 21:55:13,285 INFO  L137   tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-10-14 21:55:13,296 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2019-10-14 21:55:13,297 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20
[2019-10-14 21:55:13,299 INFO  L87              Difference]: Start difference. First operand 906 states. Second operand 5 states.
[2019-10-14 21:55:25,486 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-10-14 21:55:25,486 INFO  L93              Difference]: Finished difference Result 3521 states and 6823 transitions.
[2019-10-14 21:55:25,487 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2019-10-14 21:55:25,489 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 797
[2019-10-14 21:55:25,494 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-10-14 21:55:25,543 INFO  L225             Difference]: With dead ends: 3521
[2019-10-14 21:55:25,544 INFO  L226             Difference]: Without dead ends: 2547
[2019-10-14 21:55:25,559 INFO  L600         BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 6 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42
[2019-10-14 21:55:25,582 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 2547 states.
[2019-10-14 21:55:25,738 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 2547 to 2534.
[2019-10-14 21:55:25,739 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 2534 states.
[2019-10-14 21:55:25,753 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 2534 states to 2534 states and 4700 transitions.
[2019-10-14 21:55:25,755 INFO  L78                 Accepts]: Start accepts. Automaton has 2534 states and 4700 transitions. Word has length 797
[2019-10-14 21:55:25,757 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-10-14 21:55:25,757 INFO  L462      AbstractCegarLoop]: Abstraction has 2534 states and 4700 transitions.
[2019-10-14 21:55:25,758 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2019-10-14 21:55:25,758 INFO  L276                IsEmpty]: Start isEmpty. Operand 2534 states and 4700 transitions.
[2019-10-14 21:55:25,792 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 871
[2019-10-14 21:55:25,792 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-14 21:55:25,793 INFO  L380         BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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]
[2019-10-14 21:55:25,793 INFO  L410      AbstractCegarLoop]: === Iteration 2 === [calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-14 21:55:25,795 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-14 21:55:25,795 INFO  L82        PathProgramCache]: Analyzing trace with hash -1028569331, now seen corresponding path program 1 times
[2019-10-14 21:55:25,796 INFO  L157   tionRefinementEngine]: Executing refinement strategy CAMEL
[2019-10-14 21:55:25,796 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954344098]
[2019-10-14 21:55:25,796 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-14 21:55:25,796 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-14 21:55:25,796 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-14 21:55:25,890 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 21:55:26,081 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 21:55:26,123 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 21:55:26,855 INFO  L134       CoverageAnalysis]: Checked inductivity of 70 backedges. 70 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-10-14 21:55:26,857 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954344098]
[2019-10-14 21:55:26,857 INFO  L223   tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-10-14 21:55:26,857 INFO  L236   tionRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8
[2019-10-14 21:55:26,857 INFO  L342   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123592759]
[2019-10-14 21:55:26,861 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 9 states
[2019-10-14 21:55:26,861 INFO  L137   tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-10-14 21:55:26,862 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants.
[2019-10-14 21:55:26,862 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72
[2019-10-14 21:55:26,862 INFO  L87              Difference]: Start difference. First operand 2534 states and 4700 transitions. Second operand 9 states.
[2019-10-14 21:55:37,720 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-10-14 21:55:37,720 INFO  L93              Difference]: Finished difference Result 6011 states and 11152 transitions.
[2019-10-14 21:55:37,722 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. 
[2019-10-14 21:55:37,722 INFO  L78                 Accepts]: Start accepts. Automaton has 9 states. Word has length 870
[2019-10-14 21:55:37,723 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-10-14 21:55:37,743 INFO  L225             Difference]: With dead ends: 6011
[2019-10-14 21:55:37,743 INFO  L226             Difference]: Without dead ends: 3483
[2019-10-14 21:55:37,750 INFO  L600         BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182
[2019-10-14 21:55:37,754 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 3483 states.
[2019-10-14 21:55:37,862 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 3483 to 3426.
[2019-10-14 21:55:37,862 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 3426 states.
[2019-10-14 21:55:37,873 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 3426 states to 3426 states and 5760 transitions.
[2019-10-14 21:55:37,874 INFO  L78                 Accepts]: Start accepts. Automaton has 3426 states and 5760 transitions. Word has length 870
[2019-10-14 21:55:37,874 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-10-14 21:55:37,874 INFO  L462      AbstractCegarLoop]: Abstraction has 3426 states and 5760 transitions.
[2019-10-14 21:55:37,874 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 9 states.
[2019-10-14 21:55:37,875 INFO  L276                IsEmpty]: Start isEmpty. Operand 3426 states and 5760 transitions.
[2019-10-14 21:55:37,904 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 890
[2019-10-14 21:55:37,905 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-14 21:55:37,906 INFO  L380         BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:55:37,906 INFO  L410      AbstractCegarLoop]: === Iteration 3 === [calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-14 21:55:37,906 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-14 21:55:37,907 INFO  L82        PathProgramCache]: Analyzing trace with hash 1583768158, now seen corresponding path program 1 times
[2019-10-14 21:55:37,907 INFO  L157   tionRefinementEngine]: Executing refinement strategy CAMEL
[2019-10-14 21:55:37,907 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139728398]
[2019-10-14 21:55:37,908 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-14 21:55:37,908 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-14 21:55:37,908 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-14 21:55:37,976 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 21:55:38,161 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 21:55:38,193 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 21:55:38,228 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 21:55:38,852 INFO  L134       CoverageAnalysis]: Checked inductivity of 105 backedges. 99 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2019-10-14 21:55:38,853 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139728398]
[2019-10-14 21:55:38,853 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693624366]
[2019-10-14 21:55:38,854 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 21:55:39,140 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 21:55:39,144 INFO  L256         TraceCheckSpWp]: Trace formula consists of 1268 conjuncts, 4 conjunts are in the unsatisfiable core
[2019-10-14 21:55:39,179 INFO  L279         TraceCheckSpWp]: Computing forward predicates...