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 --traceabstraction.trace.refinement.strategy SIFA_TAIPAN --sifa.abstract.domain CompoundDomain --rcfgbuilder.size.of.a.code.block LoopFreeBlock --sifa.call.summarizer TopInputCallSummarizer --sifa.fluid SizeLimitFluid --sifa.simplification.technique SIMPLIFY_QUICK -i ../../../trunk/examples/svcomp/eca-rers2012/Problem04_label24.c


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


This is Ultimate 0.1.24-36ac518-m
[2019-10-07 00:59:36,999 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2019-10-07 00:59:37,002 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2019-10-07 00:59:37,018 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2019-10-07 00:59:37,019 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2019-10-07 00:59:37,020 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2019-10-07 00:59:37,021 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2019-10-07 00:59:37,023 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2019-10-07 00:59:37,076 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2019-10-07 00:59:37,077 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
[2019-10-07 00:59:37,078 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
[2019-10-07 00:59:37,079 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2019-10-07 00:59:37,079 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2019-10-07 00:59:37,080 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2019-10-07 00:59:37,081 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2019-10-07 00:59:37,082 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2019-10-07 00:59:37,083 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2019-10-07 00:59:37,084 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2019-10-07 00:59:37,086 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2019-10-07 00:59:37,088 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2019-10-07 00:59:37,089 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2019-10-07 00:59:37,090 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2019-10-07 00:59:37,091 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2019-10-07 00:59:37,092 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2019-10-07 00:59:37,094 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2019-10-07 00:59:37,094 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2019-10-07 00:59:37,095 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2019-10-07 00:59:37,096 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2019-10-07 00:59:37,096 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2019-10-07 00:59:37,097 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2019-10-07 00:59:37,097 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2019-10-07 00:59:37,098 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2019-10-07 00:59:37,099 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2019-10-07 00:59:37,099 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2019-10-07 00:59:37,100 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2019-10-07 00:59:37,101 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
[2019-10-07 00:59:37,101 INFO  L184        SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2019-10-07 00:59:37,101 INFO  L184        SettingsManager]: ReqParser provides no preferences, ignoring...
[2019-10-07 00:59:37,102 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
[2019-10-07 00:59:37,103 INFO  L181        SettingsManager]: Resetting Witness Parser preferences to default values
[2019-10-07 00:59:37,103 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2019-10-07 00:59:37,104 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
[2019-10-07 00:59:37,126 INFO  L113        SettingsManager]: Loading preferences was successful
[2019-10-07 00:59:37,126 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2019-10-07 00:59:37,127 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2019-10-07 00:59:37,128 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2019-10-07 00:59:37,128 INFO  L138        SettingsManager]:  * Use SBE=true
[2019-10-07 00:59:37,128 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2019-10-07 00:59:37,128 INFO  L138        SettingsManager]:  * sizeof long=4
[2019-10-07 00:59:37,129 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2019-10-07 00:59:37,129 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2019-10-07 00:59:37,129 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2019-10-07 00:59:37,130 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2019-10-07 00:59:37,130 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2019-10-07 00:59:37,130 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2019-10-07 00:59:37,131 INFO  L138        SettingsManager]:  * sizeof long double=12
[2019-10-07 00:59:37,131 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2019-10-07 00:59:37,131 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2019-10-07 00:59:37,131 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2019-10-07 00:59:37,132 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2019-10-07 00:59:37,132 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2019-10-07 00:59:37,132 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2019-10-07 00:59:37,132 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2019-10-07 00:59:37,133 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2019-10-07 00:59:37,133 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2019-10-07 00:59:37,133 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2019-10-07 00:59:37,133 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2019-10-07 00:59:37,133 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2019-10-07 00:59:37,134 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2019-10-07 00:59:37,134 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2019-10-07 00:59:37,134 INFO  L138        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> SIFA_TAIPAN
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> CompoundDomain
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> LoopFreeBlock
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Call Summarizer -> TopInputCallSummarizer
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Fluid -> SizeLimitFluid
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Simplification Technique -> SIMPLIFY_QUICK
[2019-10-07 00:59:37,444 INFO  L81    nceAwareModelManager]: Repository-Root is: /tmp
[2019-10-07 00:59:37,458 INFO  L258   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2019-10-07 00:59:37,461 INFO  L214   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2019-10-07 00:59:37,463 INFO  L271        PluginConnector]: Initializing CDTParser...
[2019-10-07 00:59:37,463 INFO  L275        PluginConnector]: CDTParser initialized
[2019-10-07 00:59:37,464 INFO  L428   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem04_label24.c
[2019-10-07 00:59:37,536 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8b7637f23/a654f0340b5147aeb6428312ae158400/FLAG78ff8f396
[2019-10-07 00:59:38,323 INFO  L306              CDTParser]: Found 1 translation units.
[2019-10-07 00:59:38,326 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem04_label24.c
[2019-10-07 00:59:38,363 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8b7637f23/a654f0340b5147aeb6428312ae158400/FLAG78ff8f396
[2019-10-07 00:59:38,395 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8b7637f23/a654f0340b5147aeb6428312ae158400
[2019-10-07 00:59:38,408 INFO  L296   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2019-10-07 00:59:38,409 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2019-10-07 00:59:38,412 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2019-10-07 00:59:38,412 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2019-10-07 00:59:38,415 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2019-10-07 00:59:38,416 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.10 12:59:38" (1/1) ...
[2019-10-07 00:59:38,420 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3fbd8e3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 12:59:38, skipping insertion in model container
[2019-10-07 00:59:38,420 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.10 12:59:38" (1/1) ...
[2019-10-07 00:59:38,430 INFO  L142         MainTranslator]: Starting translation in SV-COMP mode 
[2019-10-07 00:59:38,648 INFO  L173         MainTranslator]: Built tables and reachable declarations
[2019-10-07 00:59:40,061 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2019-10-07 00:59:40,071 INFO  L188         MainTranslator]: Completed pre-run
[2019-10-07 00:59:40,739 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2019-10-07 00:59:40,772 INFO  L192         MainTranslator]: Completed translation
[2019-10-07 00:59:40,772 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 12:59:40 WrapperNode
[2019-10-07 00:59:40,773 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2019-10-07 00:59:40,774 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2019-10-07 00:59:40,774 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2019-10-07 00:59:40,774 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2019-10-07 00:59:40,788 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 12:59:40" (1/1) ...
[2019-10-07 00:59:40,789 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 12:59:40" (1/1) ...
[2019-10-07 00:59:40,843 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 12:59:40" (1/1) ...
[2019-10-07 00:59:40,845 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 12:59:40" (1/1) ...
[2019-10-07 00:59:40,960 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 12:59:40" (1/1) ...
[2019-10-07 00:59:40,999 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 12:59:40" (1/1) ...
[2019-10-07 00:59:41,024 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 12:59:40" (1/1) ...
[2019-10-07 00:59:41,051 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2019-10-07 00:59:41,052 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2019-10-07 00:59:41,052 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2019-10-07 00:59:41,052 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2019-10-07 00:59:41,053 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 12:59:40" (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
[2019-10-07 00:59:41,132 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2019-10-07 00:59:41,132 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2019-10-07 00:59:41,132 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output
[2019-10-07 00:59:41,133 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output2
[2019-10-07 00:59:41,133 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output3
[2019-10-07 00:59:41,134 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output4
[2019-10-07 00:59:41,135 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2019-10-07 00:59:41,135 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output
[2019-10-07 00:59:41,135 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output2
[2019-10-07 00:59:41,135 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output3
[2019-10-07 00:59:41,135 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output4
[2019-10-07 00:59:41,137 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2019-10-07 00:59:41,138 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int
[2019-10-07 00:59:41,138 INFO  L130     BoogieDeclarations]: Found specification of procedure exit
[2019-10-07 00:59:41,138 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2019-10-07 00:59:41,138 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2019-10-07 00:59:41,139 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2019-10-07 00:59:46,379 INFO  L279             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2019-10-07 00:59:46,380 INFO  L284             CfgBuilder]: Removed 1 assume(true) statements.
[2019-10-07 00:59:46,386 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.10 12:59:46 BoogieIcfgContainer
[2019-10-07 00:59:46,386 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2019-10-07 00:59:46,387 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2019-10-07 00:59:46,387 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2019-10-07 00:59:46,391 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2019-10-07 00:59:46,391 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.10 12:59:38" (1/3) ...
[2019-10-07 00:59:46,392 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@790570b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.10 12:59:46, skipping insertion in model container
[2019-10-07 00:59:46,392 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 12:59:40" (2/3) ...
[2019-10-07 00:59:46,394 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@790570b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.10 12:59:46, skipping insertion in model container
[2019-10-07 00:59:46,395 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.10 12:59:46" (3/3) ...
[2019-10-07 00:59:46,401 INFO  L109   eAbstractionObserver]: Analyzing ICFG Problem04_label24.c
[2019-10-07 00:59:46,415 INFO  L152   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2019-10-07 00:59:46,426 INFO  L164   ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2019-10-07 00:59:46,440 INFO  L249      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2019-10-07 00:59:46,488 INFO  L373      AbstractCegarLoop]: Interprodecural is true
[2019-10-07 00:59:46,488 INFO  L374      AbstractCegarLoop]: Hoare is true
[2019-10-07 00:59:46,488 INFO  L375      AbstractCegarLoop]: Compute interpolants for FPandBP
[2019-10-07 00:59:46,489 INFO  L376      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2019-10-07 00:59:46,489 INFO  L377      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2019-10-07 00:59:46,489 INFO  L378      AbstractCegarLoop]: Difference is false
[2019-10-07 00:59:46,489 INFO  L379      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2019-10-07 00:59:46,489 INFO  L383      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2019-10-07 00:59:46,530 INFO  L276                IsEmpty]: Start isEmpty. Operand 785 states.
[2019-10-07 00:59:46,580 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 768
[2019-10-07 00:59:46,581 INFO  L377         BasicCegarLoop]: Found error trace
[2019-10-07 00:59:46,583 INFO  L385         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]
[2019-10-07 00:59:46,585 INFO  L410      AbstractCegarLoop]: === Iteration 1 === [calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-07 00:59:46,590 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-07 00:59:46,591 INFO  L82        PathProgramCache]: Analyzing trace with hash -1899129191, now seen corresponding path program 1 times
[2019-10-07 00:59:46,601 INFO  L150   tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2019-10-07 00:59:46,602 INFO  L231   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig
[2019-10-07 00:59:46,602 INFO  L117   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-07 00:59:46,603 INFO  L117   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-07 00:59:46,603 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-07 00:59:47,206 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-07 00:59:48,621 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-10-07 00:59:48,622 INFO  L286   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig
[2019-10-07 00:59:48,623 INFO  L211   tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-10-07 00:59:48,623 INFO  L224   tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2019-10-07 00:59:48,634 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 3 states
[2019-10-07 00:59:48,649 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2019-10-07 00:59:48,650 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2019-10-07 00:59:48,653 INFO  L87              Difference]: Start difference. First operand 785 states. Second operand 3 states.
[2019-10-07 00:59:52,972 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-10-07 00:59:52,973 INFO  L93              Difference]: Finished difference Result 2343 states and 4615 transitions.
[2019-10-07 00:59:52,973 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2019-10-07 00:59:52,975 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 767
[2019-10-07 00:59:52,980 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-10-07 00:59:53,024 INFO  L225             Difference]: With dead ends: 2343
[2019-10-07 00:59:53,024 INFO  L226             Difference]: Without dead ends: 1555
[2019-10-07 00:59:53,037 INFO  L606         BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 6 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2019-10-07 00:59:53,060 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 1555 states.
[2019-10-07 00:59:53,191 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 1555 to 1555.
[2019-10-07 00:59:53,192 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 1555 states.
[2019-10-07 00:59:53,202 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 1555 states to 1555 states and 2895 transitions.
[2019-10-07 00:59:53,204 INFO  L78                 Accepts]: Start accepts. Automaton has 1555 states and 2895 transitions. Word has length 767
[2019-10-07 00:59:53,207 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-10-07 00:59:53,207 INFO  L462      AbstractCegarLoop]: Abstraction has 1555 states and 2895 transitions.
[2019-10-07 00:59:53,207 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2019-10-07 00:59:53,207 INFO  L276                IsEmpty]: Start isEmpty. Operand 1555 states and 2895 transitions.
[2019-10-07 00:59:53,255 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 776
[2019-10-07 00:59:53,255 INFO  L377         BasicCegarLoop]: Found error trace
[2019-10-07 00:59:53,256 INFO  L385         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]
[2019-10-07 00:59:53,256 INFO  L410      AbstractCegarLoop]: === Iteration 2 === [calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-07 00:59:53,257 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-07 00:59:53,258 INFO  L82        PathProgramCache]: Analyzing trace with hash -1537899800, now seen corresponding path program 1 times
[2019-10-07 00:59:53,258 INFO  L150   tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2019-10-07 00:59:53,258 INFO  L231   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig
[2019-10-07 00:59:53,259 INFO  L117   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-07 00:59:53,259 INFO  L117   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-07 00:59:53,259 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-07 00:59:53,433 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-07 00:59:55,094 INFO  L134       CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-10-07 00:59:55,094 INFO  L286   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig
[2019-10-07 00:59:55,095 INFO  L211   tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-10-07 00:59:55,095 INFO  L224   tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2019-10-07 00:59:55,100 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 4 states
[2019-10-07 00:59:55,101 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2019-10-07 00:59:55,101 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2019-10-07 00:59:55,101 INFO  L87              Difference]: Start difference. First operand 1555 states and 2895 transitions. Second operand 4 states.
[2019-10-07 01:00:01,603 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-10-07 01:00:01,604 INFO  L93              Difference]: Finished difference Result 6201 states and 11691 transitions.
[2019-10-07 01:00:01,609 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2019-10-07 01:00:01,610 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 775
[2019-10-07 01:00:01,611 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-10-07 01:00:01,643 INFO  L225             Difference]: With dead ends: 6201
[2019-10-07 01:00:01,644 INFO  L226             Difference]: Without dead ends: 4651
[2019-10-07 01:00:01,652 INFO  L606         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
[2019-10-07 01:00:01,658 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 4651 states.
[2019-10-07 01:00:01,779 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 4651 to 4651.
[2019-10-07 01:00:01,779 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 4651 states.
[2019-10-07 01:00:01,798 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 4651 states to 4651 states and 8149 transitions.
[2019-10-07 01:00:01,798 INFO  L78                 Accepts]: Start accepts. Automaton has 4651 states and 8149 transitions. Word has length 775
[2019-10-07 01:00:01,800 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-10-07 01:00:01,800 INFO  L462      AbstractCegarLoop]: Abstraction has 4651 states and 8149 transitions.
[2019-10-07 01:00:01,800 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2019-10-07 01:00:01,801 INFO  L276                IsEmpty]: Start isEmpty. Operand 4651 states and 8149 transitions.
[2019-10-07 01:00:01,821 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 783
[2019-10-07 01:00:01,821 INFO  L377         BasicCegarLoop]: Found error trace
[2019-10-07 01:00:01,822 INFO  L385         BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-10-07 01:00:01,823 INFO  L410      AbstractCegarLoop]: === Iteration 3 === [calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-07 01:00:01,823 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-07 01:00:01,824 INFO  L82        PathProgramCache]: Analyzing trace with hash 1340665190, now seen corresponding path program 1 times
[2019-10-07 01:00:01,824 INFO  L150   tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2019-10-07 01:00:01,825 INFO  L231   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig
[2019-10-07 01:00:01,826 INFO  L117   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-07 01:00:01,826 INFO  L117   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-07 01:00:01,826 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-07 01:00:01,892 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-07 01:00:02,667 INFO  L134       CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-10-07 01:00:02,668 INFO  L286   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig
[2019-10-07 01:00:02,668 INFO  L211   tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-10-07 01:00:02,668 INFO  L224   tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6
[2019-10-07 01:00:02,670 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 6 states
[2019-10-07 01:00:02,671 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2019-10-07 01:00:02,675 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30
[2019-10-07 01:00:02,675 INFO  L87              Difference]: Start difference. First operand 4651 states and 8149 transitions. Second operand 6 states.
[2019-10-07 01:00:08,823 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-10-07 01:00:08,823 INFO  L93              Difference]: Finished difference Result 11017 states and 19350 transitions.
[2019-10-07 01:00:08,829 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. 
[2019-10-07 01:00:08,830 INFO  L78                 Accepts]: Start accepts. Automaton has 6 states. Word has length 782
[2019-10-07 01:00:08,830 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-10-07 01:00:08,867 INFO  L225             Difference]: With dead ends: 11017
[2019-10-07 01:00:08,867 INFO  L226             Difference]: Without dead ends: 6371
[2019-10-07 01:00:08,878 INFO  L606         BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72
[2019-10-07 01:00:08,895 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 6371 states.
[2019-10-07 01:00:09,053 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 6371 to 6334.
[2019-10-07 01:00:09,054 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 6334 states.
[2019-10-07 01:00:09,082 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6334 states to 6334 states and 10753 transitions.
[2019-10-07 01:00:09,082 INFO  L78                 Accepts]: Start accepts. Automaton has 6334 states and 10753 transitions. Word has length 782
[2019-10-07 01:00:09,082 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-10-07 01:00:09,083 INFO  L462      AbstractCegarLoop]: Abstraction has 6334 states and 10753 transitions.
[2019-10-07 01:00:09,083 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 6 states.
[2019-10-07 01:00:09,083 INFO  L276                IsEmpty]: Start isEmpty. Operand 6334 states and 10753 transitions.
[2019-10-07 01:00:09,107 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 802
[2019-10-07 01:00:09,107 INFO  L377         BasicCegarLoop]: Found error trace
[2019-10-07 01:00:09,108 INFO  L385         BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-10-07 01:00:09,109 INFO  L410      AbstractCegarLoop]: === Iteration 4 === [calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-07 01:00:09,109 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-07 01:00:09,110 INFO  L82        PathProgramCache]: Analyzing trace with hash -599414143, now seen corresponding path program 1 times
[2019-10-07 01:00:09,110 INFO  L150   tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2019-10-07 01:00:09,110 INFO  L231   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig
[2019-10-07 01:00:09,110 INFO  L117   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-07 01:00:09,111 INFO  L117   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-07 01:00:09,111 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-07 01:00:09,179 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-07 01:00:09,725 INFO  L134       CoverageAnalysis]: Checked inductivity of 43 backedges. 41 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-10-07 01:00:09,726 INFO  L286   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig
[2019-10-07 01:00:09,726 INFO  L286   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3
[2019-10-07 01:00:09,727 INFO  L95    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
[2019-10-07 01:00:10,088 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-07 01:00:10,094 INFO  L256         TraceCheckSpWp]: Trace formula consists of 1232 conjuncts, 10 conjunts are in the unsatisfiable core
[2019-10-07 01:00:10,125 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
[2019-10-07 01:00:10,702 INFO  L134       CoverageAnalysis]: Checked inductivity of 43 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked.
[2019-10-07 01:00:10,703 INFO  L322         TraceCheckSpWp]: Computing backward predicates...
[2019-10-07 01:00:11,298 INFO  L134       CoverageAnalysis]: Checked inductivity of 43 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked.
[2019-10-07 01:00:11,298 INFO  L211   tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences.
[2019-10-07 01:00:11,299 INFO  L224   tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 7
[2019-10-07 01:00:11,301 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 3 states
[2019-10-07 01:00:11,301 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2019-10-07 01:00:11,302 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42
[2019-10-07 01:00:11,302 INFO  L87              Difference]: Start difference. First operand 6334 states and 10753 transitions. Second operand 3 states.
[2019-10-07 01:00:15,731 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-10-07 01:00:15,732 INFO  L93              Difference]: Finished difference Result 18950 states and 32882 transitions.
[2019-10-07 01:00:15,736 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2019-10-07 01:00:15,736 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 801
[2019-10-07 01:00:15,739 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-10-07 01:00:15,812 INFO  L225             Difference]: With dead ends: 18950
[2019-10-07 01:00:15,813 INFO  L226             Difference]: Without dead ends: 12621
[2019-10-07 01:00:15,834 INFO  L606         BasicCegarLoop]: 0 DeclaredPredicates, 1607 GetRequests, 1597 SyntacticMatches, 5 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42
[2019-10-07 01:00:15,851 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 12621 states.
[2019-10-07 01:00:16,133 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 12621 to 12621.
[2019-10-07 01:00:16,133 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 12621 states.
[2019-10-07 01:00:16,163 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 12621 states to 12621 states and 19051 transitions.
[2019-10-07 01:00:16,163 INFO  L78                 Accepts]: Start accepts. Automaton has 12621 states and 19051 transitions. Word has length 801
[2019-10-07 01:00:16,165 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-10-07 01:00:16,165 INFO  L462      AbstractCegarLoop]: Abstraction has 12621 states and 19051 transitions.
[2019-10-07 01:00:16,165 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2019-10-07 01:00:16,165 INFO  L276                IsEmpty]: Start isEmpty. Operand 12621 states and 19051 transitions.
[2019-10-07 01:00:16,217 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 879
[2019-10-07 01:00:16,218 INFO  L377         BasicCegarLoop]: Found error trace
[2019-10-07 01:00:16,218 INFO  L385         BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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]
[2019-10-07 01:00:16,426 WARN  L499      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2019-10-07 01:00:16,426 INFO  L410      AbstractCegarLoop]: === Iteration 5 === [calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-07 01:00:16,427 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-07 01:00:16,428 INFO  L82        PathProgramCache]: Analyzing trace with hash -852834673, now seen corresponding path program 1 times
[2019-10-07 01:00:16,428 INFO  L150   tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2019-10-07 01:00:16,429 INFO  L231   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig
[2019-10-07 01:00:16,429 INFO  L117   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-07 01:00:16,429 INFO  L117   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-07 01:00:16,429 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-07 01:00:16,512 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-07 01:00:17,798 INFO  L134       CoverageAnalysis]: Checked inductivity of 158 backedges. 105 proven. 49 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked.
[2019-10-07 01:00:17,798 INFO  L286   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig
[2019-10-07 01:00:17,798 INFO  L286   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3
[2019-10-07 01:00:17,799 INFO  L95    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
[2019-10-07 01:00:18,091 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-07 01:00:18,094 INFO  L256         TraceCheckSpWp]: Trace formula consists of 1308 conjuncts, 6 conjunts are in the unsatisfiable core
[2019-10-07 01:00:18,121 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
[2019-10-07 01:00:18,526 INFO  L134       CoverageAnalysis]: Checked inductivity of 158 backedges. 107 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked.
[2019-10-07 01:00:18,526 INFO  L322         TraceCheckSpWp]: Computing backward predicates...
[2019-10-07 01:00:18,974 INFO  L134       CoverageAnalysis]: Checked inductivity of 158 backedges. 105 proven. 49 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked.
[2019-10-07 01:00:18,975 INFO  L211   tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences.
[2019-10-07 01:00:18,975 INFO  L224   tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11
[2019-10-07 01:00:18,977 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 5 states
[2019-10-07 01:00:18,978 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2019-10-07 01:00:18,978 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110
[2019-10-07 01:00:18,979 INFO  L87              Difference]: Start difference. First operand 12621 states and 19051 transitions. Second operand 5 states.
[2019-10-07 01:00:25,181 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-10-07 01:00:25,182 INFO  L93              Difference]: Finished difference Result 31823 states and 51070 transitions.
[2019-10-07 01:00:25,182 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2019-10-07 01:00:25,182 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 878
[2019-10-07 01:00:25,183 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-10-07 01:00:25,259 INFO  L225             Difference]: With dead ends: 31823
[2019-10-07 01:00:25,260 INFO  L226             Difference]: Without dead ends: 19207
[2019-10-07 01:00:25,295 INFO  L606         BasicCegarLoop]: 0 DeclaredPredicates, 1765 GetRequests, 1752 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182
[2019-10-07 01:00:25,316 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 19207 states.
[2019-10-07 01:00:25,673 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 19207 to 18393.
[2019-10-07 01:00:25,674 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 18393 states.
[2019-10-07 01:00:25,717 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 18393 states to 18393 states and 27532 transitions.
[2019-10-07 01:00:25,718 INFO  L78                 Accepts]: Start accepts. Automaton has 18393 states and 27532 transitions. Word has length 878
[2019-10-07 01:00:25,718 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-10-07 01:00:25,718 INFO  L462      AbstractCegarLoop]: Abstraction has 18393 states and 27532 transitions.
[2019-10-07 01:00:25,719 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2019-10-07 01:00:25,719 INFO  L276                IsEmpty]: Start isEmpty. Operand 18393 states and 27532 transitions.
[2019-10-07 01:00:25,781 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 930
[2019-10-07 01:00:25,781 INFO  L377         BasicCegarLoop]: Found error trace
[2019-10-07 01:00:25,783 INFO  L385         BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 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, 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]
[2019-10-07 01:00:25,996 WARN  L499      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2019-10-07 01:00:25,997 INFO  L410      AbstractCegarLoop]: === Iteration 6 === [calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-07 01:00:25,998 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-07 01:00:25,998 INFO  L82        PathProgramCache]: Analyzing trace with hash 1464068799, now seen corresponding path program 1 times
[2019-10-07 01:00:25,999 INFO  L150   tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2019-10-07 01:00:25,999 INFO  L231   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig
[2019-10-07 01:00:25,999 INFO  L117   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-07 01:00:25,999 INFO  L117   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-07 01:00:26,000 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-07 01:00:26,072 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-07 01:00:27,168 INFO  L134       CoverageAnalysis]: Checked inductivity of 253 backedges. 171 proven. 28 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked.
[2019-10-07 01:00:27,169 INFO  L286   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig
[2019-10-07 01:00:27,169 INFO  L286   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3
[2019-10-07 01:00:27,170 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2019-10-07 01:00:27,477 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-07 01:00:27,480 INFO  L256         TraceCheckSpWp]: Trace formula consists of 1474 conjuncts, 4 conjunts are in the unsatisfiable core
[2019-10-07 01:00:27,502 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
[2019-10-07 01:00:28,482 INFO  L134       CoverageAnalysis]: Checked inductivity of 253 backedges. 221 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked.
[2019-10-07 01:00:28,482 INFO  L322         TraceCheckSpWp]: Computing backward predicates...
[2019-10-07 01:00:29,269 INFO  L134       CoverageAnalysis]: Checked inductivity of 253 backedges. 193 proven. 20 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked.
[2019-10-07 01:00:29,269 INFO  L286   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa
[2019-10-07 01:00:29,367 INFO  L162        IcfgInterpreter]: Started Sifa with 771 locations of interest
[2019-10-07 01:00:29,367 INFO  L169        IcfgInterpreter]: Building call graph
[2019-10-07 01:00:29,378 INFO  L174        IcfgInterpreter]: Initial procedures are [ULTIMATE.start]
[2019-10-07 01:00:29,387 INFO  L179        IcfgInterpreter]: Starting interpretation
[2019-10-07 01:00:29,388 INFO  L199        IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs
[2019-10-07 01:00:29,654 WARN  L191               SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 77
[2019-10-07 01:00:29,827 INFO  L199        IcfgInterpreter]: Interpreting procedure main with input of size 101 for LOIs
[2019-10-07 01:00:30,696 WARN  L499      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2019-10-07 01:00:30,699 FATAL L?                        ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception:
java.lang.AssertionError: java.lang.IllegalArgumentException: Tried to insert element unknown in custom order: assume true;
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.tryExecuteInterpolantGenerator(TraceAbstractionRefinementEngine.java:295)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.generateProof(TraceAbstractionRefinementEngine.java:177)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.executeStrategy(TraceAbstractionRefinementEngine.java:167)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.<init>(TraceAbstractionRefinementEngine.java:90)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.RefinementEngineFactory.runRefinementEngine(RefinementEngineFactory.java:133)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:436)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:419)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:368)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterate(TraceAbstractionStarter.java:332)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:170)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.<init>(TraceAbstractionStarter.java:122)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:120)
	at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168)
	at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151)
	at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128)
	at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232)
	at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226)
	at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142)
	at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104)
	at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:316)
	at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145)
	at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55)
Caused by: java.lang.IllegalArgumentException: Tried to insert element unknown in custom order: assume true;
	at de.uni_freiburg.informatik.ultimate.lib.sifa.PriorityWorklist.add(PriorityWorklist.java:97)
	at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.lambda$2(DagInterpreter.java:135)
	at java.lang.Iterable.forEach(Iterable.java:75)
	at java.util.Collections$UnmodifiableCollection.forEach(Collections.java:1080)
	at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:135)
	at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:104)
	at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.TopInputCallSummarizer.computeTopSummary(TopInputCallSummarizer.java:78)
	at java.util.HashMap.computeIfAbsent(HashMap.java:1127)
	at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.TopInputCallSummarizer.summarize(TopInputCallSummarizer.java:67)
	at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretCallReturnSummary(DagInterpreter.java:230)
	at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:214)
	at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:197)
	at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:166)
	at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:130)
	at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:104)
	at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.FixpointLoopSummarizer.summarizeInternal(FixpointLoopSummarizer.java:118)
	at java.util.HashMap.computeIfAbsent(HashMap.java:1127)
	at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.FixpointLoopSummarizer.summarize(FixpointLoopSummarizer.java:94)
	at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretLoop(DagInterpreter.java:178)
	at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:169)
	at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:130)
	at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:139)
	at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:129)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.<init>(SifaRunner.java:99)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:99)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:75)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.tryExecuteInterpolantGenerator(TraceAbstractionRefinementEngine.java:287)
	... 21 more
[2019-10-07 01:00:30,705 INFO  L168              Benchmark]: Toolchain (without parser) took 52295.09 ms. Allocated memory was 148.4 MB in the beginning and 1.8 GB in the end (delta: 1.6 GB). Free memory was 89.7 MB in the beginning and 1.3 GB in the end (delta: -1.2 GB). Peak memory consumption was 410.1 MB. Max. memory is 7.1 GB.
[2019-10-07 01:00:30,706 INFO  L168              Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 148.4 MB. Free memory was 123.5 MB in the beginning and 123.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB.
[2019-10-07 01:00:30,707 INFO  L168              Benchmark]: CACSL2BoogieTranslator took 2362.01 ms. Allocated memory was 148.4 MB in the beginning and 248.5 MB in the end (delta: 100.1 MB). Free memory was 89.5 MB in the beginning and 162.9 MB in the end (delta: -73.4 MB). Peak memory consumption was 110.4 MB. Max. memory is 7.1 GB.
[2019-10-07 01:00:30,708 INFO  L168              Benchmark]: Boogie Preprocessor took 277.52 ms. Allocated memory is still 248.5 MB. Free memory was 162.9 MB in the beginning and 133.8 MB in the end (delta: 29.1 MB). Peak memory consumption was 29.1 MB. Max. memory is 7.1 GB.
[2019-10-07 01:00:30,709 INFO  L168              Benchmark]: RCFGBuilder took 5334.30 ms. Allocated memory was 248.5 MB in the beginning and 360.2 MB in the end (delta: 111.7 MB). Free memory was 133.8 MB in the beginning and 141.7 MB in the end (delta: -7.9 MB). Peak memory consumption was 167.4 MB. Max. memory is 7.1 GB.
[2019-10-07 01:00:30,710 INFO  L168              Benchmark]: TraceAbstraction took 44315.34 ms. Allocated memory was 360.2 MB in the beginning and 1.8 GB in the end (delta: 1.4 GB). Free memory was 141.7 MB in the beginning and 1.3 GB in the end (delta: -1.1 GB). Peak memory consumption was 250.2 MB. Max. memory is 7.1 GB.
[2019-10-07 01:00:30,714 INFO  L335   ainManager$Toolchain]: #######################  End [Toolchain 1] #######################
 --- Results ---
 * Results from de.uni_freiburg.informatik.ultimate.core:
  - StatisticsResult: Toolchain Benchmarks
    Benchmark results are:
 * CDTParser took 0.20 ms. Allocated memory is still 148.4 MB. Free memory was 123.5 MB in the beginning and 123.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB.
 * CACSL2BoogieTranslator took 2362.01 ms. Allocated memory was 148.4 MB in the beginning and 248.5 MB in the end (delta: 100.1 MB). Free memory was 89.5 MB in the beginning and 162.9 MB in the end (delta: -73.4 MB). Peak memory consumption was 110.4 MB. Max. memory is 7.1 GB.
 * Boogie Preprocessor took 277.52 ms. Allocated memory is still 248.5 MB. Free memory was 162.9 MB in the beginning and 133.8 MB in the end (delta: 29.1 MB). Peak memory consumption was 29.1 MB. Max. memory is 7.1 GB.
 * RCFGBuilder took 5334.30 ms. Allocated memory was 248.5 MB in the beginning and 360.2 MB in the end (delta: 111.7 MB). Free memory was 133.8 MB in the beginning and 141.7 MB in the end (delta: -7.9 MB). Peak memory consumption was 167.4 MB. Max. memory is 7.1 GB.
 * TraceAbstraction took 44315.34 ms. Allocated memory was 360.2 MB in the beginning and 1.8 GB in the end (delta: 1.4 GB). Free memory was 141.7 MB in the beginning and 1.3 GB in the end (delta: -1.1 GB). Peak memory consumption was 250.2 MB. Max. memory is 7.1 GB.
 * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction:
  - ExceptionOrErrorResult: AssertionError: java.lang.IllegalArgumentException: Tried to insert element unknown in custom order: assume true;
    de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: java.lang.IllegalArgumentException: Tried to insert element unknown in custom order: assume true;: de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.tryExecuteInterpolantGenerator(TraceAbstractionRefinementEngine.java:295)
RESULT: Ultimate could not prove your program: Toolchain returned no result.
Received shutdown request...