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_label05.c


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


This is Ultimate 0.1.24-f4eb214f-m
[2019-10-13 17:56:02,773 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2019-10-13 17:56:02,775 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2019-10-13 17:56:02,788 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2019-10-13 17:56:02,789 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2019-10-13 17:56:02,790 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2019-10-13 17:56:02,792 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2019-10-13 17:56:02,796 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2019-10-13 17:56:02,805 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2019-10-13 17:56:02,806 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
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[2019-10-13 17:56:02,809 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2019-10-13 17:56:02,811 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2019-10-13 17:56:02,812 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2019-10-13 17:56:02,813 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2019-10-13 17:56:02,814 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2019-10-13 17:56:02,817 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2019-10-13 17:56:02,819 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2019-10-13 17:56:02,824 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2019-10-13 17:56:02,826 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2019-10-13 17:56:02,829 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2019-10-13 17:56:02,830 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2019-10-13 17:56:02,831 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2019-10-13 17:56:02,835 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2019-10-13 17:56:02,835 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2019-10-13 17:56:02,835 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
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[2019-10-13 17:56:02,840 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2019-10-13 17:56:02,840 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
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[2019-10-13 17:56:02,847 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
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[2019-10-13 17:56:02,848 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
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[2019-10-13 17:56:02,852 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2019-10-13 17:56:02,853 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
[2019-10-13 17:56:02,880 INFO  L113        SettingsManager]: Loading preferences was successful
[2019-10-13 17:56:02,881 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2019-10-13 17:56:02,882 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2019-10-13 17:56:02,882 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2019-10-13 17:56:02,882 INFO  L138        SettingsManager]:  * Use SBE=true
[2019-10-13 17:56:02,883 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2019-10-13 17:56:02,883 INFO  L138        SettingsManager]:  * sizeof long=4
[2019-10-13 17:56:02,883 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2019-10-13 17:56:02,883 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2019-10-13 17:56:02,883 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2019-10-13 17:56:02,883 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2019-10-13 17:56:02,884 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2019-10-13 17:56:02,884 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2019-10-13 17:56:02,884 INFO  L138        SettingsManager]:  * sizeof long double=12
[2019-10-13 17:56:02,884 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2019-10-13 17:56:02,885 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2019-10-13 17:56:02,885 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2019-10-13 17:56:02,885 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2019-10-13 17:56:02,885 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2019-10-13 17:56:02,885 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2019-10-13 17:56:02,886 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2019-10-13 17:56:02,886 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2019-10-13 17:56:02,886 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2019-10-13 17:56:02,886 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2019-10-13 17:56:02,886 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2019-10-13 17:56:02,887 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2019-10-13 17:56:02,887 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2019-10-13 17:56:02,887 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2019-10-13 17:56:02,887 INFO  L138        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2019-10-13 17:56:03,162 INFO  L81    nceAwareModelManager]: Repository-Root is: /tmp
[2019-10-13 17:56:03,175 INFO  L258   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2019-10-13 17:56:03,178 INFO  L214   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2019-10-13 17:56:03,180 INFO  L271        PluginConnector]: Initializing CDTParser...
[2019-10-13 17:56:03,180 INFO  L275        PluginConnector]: CDTParser initialized
[2019-10-13 17:56:03,181 INFO  L428   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem04_label05.c
[2019-10-13 17:56:03,242 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/60afb78bb/6e7d02348e4b48219b72cde7ec048567/FLAG9e8bb32ce
[2019-10-13 17:56:04,001 INFO  L306              CDTParser]: Found 1 translation units.
[2019-10-13 17:56:04,002 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem04_label05.c
[2019-10-13 17:56:04,028 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/60afb78bb/6e7d02348e4b48219b72cde7ec048567/FLAG9e8bb32ce
[2019-10-13 17:56:04,090 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/60afb78bb/6e7d02348e4b48219b72cde7ec048567
[2019-10-13 17:56:04,100 INFO  L296   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2019-10-13 17:56:04,101 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2019-10-13 17:56:04,102 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2019-10-13 17:56:04,103 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2019-10-13 17:56:04,108 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2019-10-13 17:56:04,109 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:56:04" (1/1) ...
[2019-10-13 17:56:04,113 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@581c0b66 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:56:04, skipping insertion in model container
[2019-10-13 17:56:04,113 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:56:04" (1/1) ...
[2019-10-13 17:56:04,122 INFO  L142         MainTranslator]: Starting translation in SV-COMP mode 
[2019-10-13 17:56:04,269 INFO  L173         MainTranslator]: Built tables and reachable declarations
[2019-10-13 17:56:05,889 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2019-10-13 17:56:05,894 INFO  L188         MainTranslator]: Completed pre-run
[2019-10-13 17:56:06,523 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2019-10-13 17:56:06,571 INFO  L192         MainTranslator]: Completed translation
[2019-10-13 17:56:06,571 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:56:06 WrapperNode
[2019-10-13 17:56:06,572 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2019-10-13 17:56:06,573 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2019-10-13 17:56:06,573 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2019-10-13 17:56:06,573 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2019-10-13 17:56:06,595 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:56:06" (1/1) ...
[2019-10-13 17:56:06,595 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:56:06" (1/1) ...
[2019-10-13 17:56:06,664 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:56:06" (1/1) ...
[2019-10-13 17:56:06,666 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:56:06" (1/1) ...
[2019-10-13 17:56:06,791 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:56:06" (1/1) ...
[2019-10-13 17:56:06,823 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:56:06" (1/1) ...
[2019-10-13 17:56:06,865 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:56:06" (1/1) ...
[2019-10-13 17:56:06,905 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2019-10-13 17:56:06,906 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2019-10-13 17:56:06,906 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2019-10-13 17:56:06,907 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2019-10-13 17:56:06,908 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:56:06" (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
[2019-10-13 17:56:06,973 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2019-10-13 17:56:06,974 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2019-10-13 17:56:06,974 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output
[2019-10-13 17:56:06,974 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output2
[2019-10-13 17:56:06,974 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output3
[2019-10-13 17:56:06,974 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output4
[2019-10-13 17:56:06,975 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2019-10-13 17:56:06,975 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output
[2019-10-13 17:56:06,976 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output2
[2019-10-13 17:56:06,976 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output3
[2019-10-13 17:56:06,976 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output4
[2019-10-13 17:56:06,976 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2019-10-13 17:56:06,977 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int
[2019-10-13 17:56:06,977 INFO  L130     BoogieDeclarations]: Found specification of procedure exit
[2019-10-13 17:56:06,977 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2019-10-13 17:56:06,977 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2019-10-13 17:56:06,978 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2019-10-13 17:56:11,583 INFO  L279             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2019-10-13 17:56:11,584 INFO  L284             CfgBuilder]: Removed 1 assume(true) statements.
[2019-10-13 17:56:11,586 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:56:11 BoogieIcfgContainer
[2019-10-13 17:56:11,586 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2019-10-13 17:56:11,587 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2019-10-13 17:56:11,588 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2019-10-13 17:56:11,591 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2019-10-13 17:56:11,591 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 05:56:04" (1/3) ...
[2019-10-13 17:56:11,592 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a61bafb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:56:11, skipping insertion in model container
[2019-10-13 17:56:11,592 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:56:06" (2/3) ...
[2019-10-13 17:56:11,593 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a61bafb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:56:11, skipping insertion in model container
[2019-10-13 17:56:11,593 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:56:11" (3/3) ...
[2019-10-13 17:56:11,595 INFO  L109   eAbstractionObserver]: Analyzing ICFG Problem04_label05.c
[2019-10-13 17:56:11,605 INFO  L152   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2019-10-13 17:56:11,619 INFO  L164   ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2019-10-13 17:56:11,632 INFO  L249      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2019-10-13 17:56:11,679 INFO  L373      AbstractCegarLoop]: Interprodecural is true
[2019-10-13 17:56:11,679 INFO  L374      AbstractCegarLoop]: Hoare is true
[2019-10-13 17:56:11,679 INFO  L375      AbstractCegarLoop]: Compute interpolants for FPandBP
[2019-10-13 17:56:11,679 INFO  L376      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2019-10-13 17:56:11,679 INFO  L377      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2019-10-13 17:56:11,680 INFO  L378      AbstractCegarLoop]: Difference is false
[2019-10-13 17:56:11,680 INFO  L379      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2019-10-13 17:56:11,680 INFO  L383      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2019-10-13 17:56:11,727 INFO  L276                IsEmpty]: Start isEmpty. Operand 906 states.
[2019-10-13 17:56:11,790 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 796
[2019-10-13 17:56:11,790 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-13 17:56:11,793 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]
[2019-10-13 17:56:11,796 INFO  L410      AbstractCegarLoop]: === Iteration 1 === [calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-13 17:56:11,803 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-13 17:56:11,805 INFO  L82        PathProgramCache]: Analyzing trace with hash -1084993238, now seen corresponding path program 1 times
[2019-10-13 17:56:11,817 INFO  L157   tionRefinementEngine]: Executing refinement strategy CAMEL
[2019-10-13 17:56:11,817 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553538489]
[2019-10-13 17:56:11,818 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 17:56:11,818 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 17:56:11,819 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-13 17:56:12,350 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 17:56:13,314 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 17:56:14,087 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-10-13 17:56:14,088 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553538489]
[2019-10-13 17:56:14,089 INFO  L223   tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-10-13 17:56:14,089 INFO  L236   tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2019-10-13 17:56:14,089 INFO  L342   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519103153]
[2019-10-13 17:56:14,096 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 5 states
[2019-10-13 17:56:14,096 INFO  L137   tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-10-13 17:56:14,108 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2019-10-13 17:56:14,109 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20
[2019-10-13 17:56:14,111 INFO  L87              Difference]: Start difference. First operand 906 states. Second operand 5 states.
[2019-10-13 17:56:22,137 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-10-13 17:56:22,137 INFO  L93              Difference]: Finished difference Result 2672 states and 5138 transitions.
[2019-10-13 17:56:22,141 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2019-10-13 17:56:22,143 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 795
[2019-10-13 17:56:22,158 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-10-13 17:56:22,206 INFO  L225             Difference]: With dead ends: 2672
[2019-10-13 17:56:22,207 INFO  L226             Difference]: Without dead ends: 1702
[2019-10-13 17:56:22,220 INFO  L600         BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 5 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30
[2019-10-13 17:56:22,249 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 1702 states.
[2019-10-13 17:56:22,396 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 1702 to 1687.
[2019-10-13 17:56:22,397 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 1687 states.
[2019-10-13 17:56:22,408 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 1687 states to 1687 states and 3135 transitions.
[2019-10-13 17:56:22,410 INFO  L78                 Accepts]: Start accepts. Automaton has 1687 states and 3135 transitions. Word has length 795
[2019-10-13 17:56:22,414 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-10-13 17:56:22,415 INFO  L462      AbstractCegarLoop]: Abstraction has 1687 states and 3135 transitions.
[2019-10-13 17:56:22,415 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2019-10-13 17:56:22,415 INFO  L276                IsEmpty]: Start isEmpty. Operand 1687 states and 3135 transitions.
[2019-10-13 17:56:22,465 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 804
[2019-10-13 17:56:22,466 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-13 17:56:22,466 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]
[2019-10-13 17:56:22,467 INFO  L410      AbstractCegarLoop]: === Iteration 2 === [calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-13 17:56:22,468 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-13 17:56:22,469 INFO  L82        PathProgramCache]: Analyzing trace with hash 959317371, now seen corresponding path program 1 times
[2019-10-13 17:56:22,469 INFO  L157   tionRefinementEngine]: Executing refinement strategy CAMEL
[2019-10-13 17:56:22,469 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511319933]
[2019-10-13 17:56:22,470 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 17:56:22,470 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 17:56:22,470 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-13 17:56:22,629 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 17:56:23,038 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 17:56:23,057 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 17:56:23,822 INFO  L134       CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-10-13 17:56:23,823 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511319933]
[2019-10-13 17:56:23,823 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385200452]
[2019-10-13 17:56:23,824 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
[2019-10-13 17:56:24,125 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 17:56:24,132 INFO  L256         TraceCheckSpWp]: Trace formula consists of 1124 conjuncts, 10 conjunts are in the unsatisfiable core
[2019-10-13 17:56:24,164 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
[2019-10-13 17:56:25,075 INFO  L134       CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-10-13 17:56:25,076 INFO  L223   tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences.
[2019-10-13 17:56:25,076 INFO  L236   tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7
[2019-10-13 17:56:25,077 INFO  L342   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078457248]
[2019-10-13 17:56:25,083 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 3 states
[2019-10-13 17:56:25,083 INFO  L137   tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-10-13 17:56:25,083 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2019-10-13 17:56:25,084 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42
[2019-10-13 17:56:25,084 INFO  L87              Difference]: Start difference. First operand 1687 states and 3135 transitions. Second operand 3 states.
[2019-10-13 17:56:29,568 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-10-13 17:56:29,568 INFO  L93              Difference]: Finished difference Result 5047 states and 9443 transitions.
[2019-10-13 17:56:29,568 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2019-10-13 17:56:29,569 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 803
[2019-10-13 17:56:29,570 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-10-13 17:56:29,587 INFO  L225             Difference]: With dead ends: 5047
[2019-10-13 17:56:29,587 INFO  L226             Difference]: Without dead ends: 3366
[2019-10-13 17:56:29,591 INFO  L600         BasicCegarLoop]: 0 DeclaredPredicates, 815 GetRequests, 810 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42
[2019-10-13 17:56:29,595 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 3366 states.
[2019-10-13 17:56:29,666 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 3366 to 3366.
[2019-10-13 17:56:29,667 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 3366 states.
[2019-10-13 17:56:29,679 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 3366 states to 3366 states and 5448 transitions.
[2019-10-13 17:56:29,679 INFO  L78                 Accepts]: Start accepts. Automaton has 3366 states and 5448 transitions. Word has length 803
[2019-10-13 17:56:29,680 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-10-13 17:56:29,681 INFO  L462      AbstractCegarLoop]: Abstraction has 3366 states and 5448 transitions.
[2019-10-13 17:56:29,681 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2019-10-13 17:56:29,681 INFO  L276                IsEmpty]: Start isEmpty. Operand 3366 states and 5448 transitions.
[2019-10-13 17:56:29,712 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 815
[2019-10-13 17:56:29,712 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-13 17:56:29,713 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]
[2019-10-13 17:56:29,921 WARN  L499      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2019-10-13 17:56:29,922 INFO  L410      AbstractCegarLoop]: === Iteration 3 === [calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-13 17:56:29,922 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-13 17:56:29,923 INFO  L82        PathProgramCache]: Analyzing trace with hash 1026627193, now seen corresponding path program 1 times
[2019-10-13 17:56:29,923 INFO  L157   tionRefinementEngine]: Executing refinement strategy CAMEL
[2019-10-13 17:56:29,924 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857378896]
[2019-10-13 17:56:29,924 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 17:56:29,925 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 17:56:29,925 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-13 17:56:30,172 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 17:56:30,710 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 17:56:30,751 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 17:56:31,575 INFO  L134       CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-10-13 17:56:31,575 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857378896]
[2019-10-13 17:56:31,576 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031169357]
[2019-10-13 17:56:31,576 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2019-10-13 17:56:31,834 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 17:56:31,838 INFO  L256         TraceCheckSpWp]: Trace formula consists of 1138 conjuncts, 10 conjunts are in the unsatisfiable core
[2019-10-13 17:56:31,854 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
[2019-10-13 17:56:32,354 INFO  L134       CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-10-13 17:56:32,355 INFO  L223   tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences.
[2019-10-13 17:56:32,355 INFO  L236   tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 8
[2019-10-13 17:56:32,355 INFO  L342   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036205632]
[2019-10-13 17:56:32,357 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 3 states
[2019-10-13 17:56:32,357 INFO  L137   tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-10-13 17:56:32,357 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2019-10-13 17:56:32,358 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56
[2019-10-13 17:56:32,358 INFO  L87              Difference]: Start difference. First operand 3366 states and 5448 transitions. Second operand 3 states.
[2019-10-13 17:56:36,948 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-10-13 17:56:36,948 INFO  L93              Difference]: Finished difference Result 8405 states and 14117 transitions.
[2019-10-13 17:56:36,955 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2019-10-13 17:56:36,955 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 814
[2019-10-13 17:56:36,957 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-10-13 17:56:36,992 INFO  L225             Difference]: With dead ends: 8405
[2019-10-13 17:56:36,992 INFO  L226             Difference]: Without dead ends: 5045
[2019-10-13 17:56:37,004 INFO  L600         BasicCegarLoop]: 0 DeclaredPredicates, 826 GetRequests, 819 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56
[2019-10-13 17:56:37,011 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 5045 states.
[2019-10-13 17:56:37,121 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 5045 to 5045.
[2019-10-13 17:56:37,121 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 5045 states.
[2019-10-13 17:56:37,136 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5045 states to 5045 states and 7730 transitions.
[2019-10-13 17:56:37,136 INFO  L78                 Accepts]: Start accepts. Automaton has 5045 states and 7730 transitions. Word has length 814
[2019-10-13 17:56:37,138 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-10-13 17:56:37,138 INFO  L462      AbstractCegarLoop]: Abstraction has 5045 states and 7730 transitions.
[2019-10-13 17:56:37,138 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2019-10-13 17:56:37,139 INFO  L276                IsEmpty]: Start isEmpty. Operand 5045 states and 7730 transitions.
[2019-10-13 17:56:37,157 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 822
[2019-10-13 17:56:37,157 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-13 17:56:37,158 INFO  L380         BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-10-13 17:56:37,367 WARN  L499      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2019-10-13 17:56:37,368 INFO  L410      AbstractCegarLoop]: === Iteration 4 === [calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-13 17:56:37,368 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-13 17:56:37,369 INFO  L82        PathProgramCache]: Analyzing trace with hash 888969439, now seen corresponding path program 1 times
[2019-10-13 17:56:37,369 INFO  L157   tionRefinementEngine]: Executing refinement strategy CAMEL
[2019-10-13 17:56:37,369 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853935917]
[2019-10-13 17:56:37,369 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 17:56:37,370 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 17:56:37,370 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-13 17:56:37,502 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat