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_label05.c


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


This is Ultimate 0.1.24-36ac518-m
[2019-10-07 00:59:19,915 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2019-10-07 00:59:19,917 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2019-10-07 00:59:19,935 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2019-10-07 00:59:19,936 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2019-10-07 00:59:19,938 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2019-10-07 00:59:19,940 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2019-10-07 00:59:19,949 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2019-10-07 00:59:19,955 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2019-10-07 00:59:19,958 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
[2019-10-07 00:59:19,959 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
[2019-10-07 00:59:19,960 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2019-10-07 00:59:19,961 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2019-10-07 00:59:19,963 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2019-10-07 00:59:19,965 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2019-10-07 00:59:19,967 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2019-10-07 00:59:19,968 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2019-10-07 00:59:19,969 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2019-10-07 00:59:19,971 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2019-10-07 00:59:19,976 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2019-10-07 00:59:19,981 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2019-10-07 00:59:19,984 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2019-10-07 00:59:19,987 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2019-10-07 00:59:19,988 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2019-10-07 00:59:19,990 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2019-10-07 00:59:19,991 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2019-10-07 00:59:19,991 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2019-10-07 00:59:19,993 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2019-10-07 00:59:19,994 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2019-10-07 00:59:19,995 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2019-10-07 00:59:19,995 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2019-10-07 00:59:19,996 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
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[2019-10-07 00:59:19,997 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2019-10-07 00:59:19,999 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2019-10-07 00:59:19,999 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
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[2019-10-07 00:59:20,000 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
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[2019-10-07 00:59:20,002 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2019-10-07 00:59:20,003 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 00:59:20,036 INFO  L113        SettingsManager]: Loading preferences was successful
[2019-10-07 00:59:20,037 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2019-10-07 00:59:20,038 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2019-10-07 00:59:20,041 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2019-10-07 00:59:20,042 INFO  L138        SettingsManager]:  * Use SBE=true
[2019-10-07 00:59:20,042 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2019-10-07 00:59:20,044 INFO  L138        SettingsManager]:  * sizeof long=4
[2019-10-07 00:59:20,044 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2019-10-07 00:59:20,044 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2019-10-07 00:59:20,045 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2019-10-07 00:59:20,045 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2019-10-07 00:59:20,045 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2019-10-07 00:59:20,045 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2019-10-07 00:59:20,045 INFO  L138        SettingsManager]:  * sizeof long double=12
[2019-10-07 00:59:20,045 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2019-10-07 00:59:20,046 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2019-10-07 00:59:20,046 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2019-10-07 00:59:20,046 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2019-10-07 00:59:20,046 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2019-10-07 00:59:20,046 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2019-10-07 00:59:20,047 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2019-10-07 00:59:20,047 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2019-10-07 00:59:20,047 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2019-10-07 00:59:20,047 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2019-10-07 00:59:20,047 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2019-10-07 00:59:20,048 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2019-10-07 00:59:20,048 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2019-10-07 00:59:20,048 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2019-10-07 00:59:20,048 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 00:59:20,343 INFO  L81    nceAwareModelManager]: Repository-Root is: /tmp
[2019-10-07 00:59:20,357 INFO  L258   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2019-10-07 00:59:20,361 INFO  L214   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2019-10-07 00:59:20,362 INFO  L271        PluginConnector]: Initializing CDTParser...
[2019-10-07 00:59:20,363 INFO  L275        PluginConnector]: CDTParser initialized
[2019-10-07 00:59:20,364 INFO  L428   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem04_label05.c
[2019-10-07 00:59:20,425 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6b59a3463/2f608d82d20241be88853a9c7f684ccf/FLAG99774332f
[2019-10-07 00:59:21,308 INFO  L306              CDTParser]: Found 1 translation units.
[2019-10-07 00:59:21,309 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem04_label05.c
[2019-10-07 00:59:21,358 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6b59a3463/2f608d82d20241be88853a9c7f684ccf/FLAG99774332f
[2019-10-07 00:59:21,821 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6b59a3463/2f608d82d20241be88853a9c7f684ccf
[2019-10-07 00:59:21,832 INFO  L296   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2019-10-07 00:59:21,834 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2019-10-07 00:59:21,835 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2019-10-07 00:59:21,835 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2019-10-07 00:59:21,839 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2019-10-07 00:59:21,840 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.10 12:59:21" (1/1) ...
[2019-10-07 00:59:21,844 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@510c0d40 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 12:59:21, skipping insertion in model container
[2019-10-07 00:59:21,844 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.10 12:59:21" (1/1) ...
[2019-10-07 00:59:21,852 INFO  L142         MainTranslator]: Starting translation in SV-COMP mode 
[2019-10-07 00:59:22,035 INFO  L173         MainTranslator]: Built tables and reachable declarations
[2019-10-07 00:59:23,833 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2019-10-07 00:59:23,839 INFO  L188         MainTranslator]: Completed pre-run
[2019-10-07 00:59:24,658 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2019-10-07 00:59:24,693 INFO  L192         MainTranslator]: Completed translation
[2019-10-07 00:59:24,694 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 12:59:24 WrapperNode
[2019-10-07 00:59:24,695 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2019-10-07 00:59:24,696 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2019-10-07 00:59:24,696 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2019-10-07 00:59:24,696 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2019-10-07 00:59:24,712 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 12:59:24" (1/1) ...
[2019-10-07 00:59:24,713 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 12:59:24" (1/1) ...
[2019-10-07 00:59:24,778 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 12:59:24" (1/1) ...
[2019-10-07 00:59:24,780 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 12:59:24" (1/1) ...
[2019-10-07 00:59:24,908 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 12:59:24" (1/1) ...
[2019-10-07 00:59:24,953 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 12:59:24" (1/1) ...
[2019-10-07 00:59:24,980 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 12:59:24" (1/1) ...
[2019-10-07 00:59:25,009 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2019-10-07 00:59:25,010 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2019-10-07 00:59:25,010 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2019-10-07 00:59:25,010 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2019-10-07 00:59:25,012 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 12:59:24" (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 00:59:25,087 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2019-10-07 00:59:25,087 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2019-10-07 00:59:25,088 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output
[2019-10-07 00:59:25,088 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output2
[2019-10-07 00:59:25,088 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output3
[2019-10-07 00:59:25,089 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output4
[2019-10-07 00:59:25,089 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2019-10-07 00:59:25,089 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output
[2019-10-07 00:59:25,090 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output2
[2019-10-07 00:59:25,090 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output3
[2019-10-07 00:59:25,090 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output4
[2019-10-07 00:59:25,091 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2019-10-07 00:59:25,091 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int
[2019-10-07 00:59:25,091 INFO  L130     BoogieDeclarations]: Found specification of procedure exit
[2019-10-07 00:59:25,091 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2019-10-07 00:59:25,092 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2019-10-07 00:59:25,092 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2019-10-07 00:59:30,576 INFO  L279             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2019-10-07 00:59:30,577 INFO  L284             CfgBuilder]: Removed 1 assume(true) statements.
[2019-10-07 00:59:30,580 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.10 12:59:30 BoogieIcfgContainer
[2019-10-07 00:59:30,581 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2019-10-07 00:59:30,582 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2019-10-07 00:59:30,582 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2019-10-07 00:59:30,587 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2019-10-07 00:59:30,587 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.10 12:59:21" (1/3) ...
[2019-10-07 00:59:30,588 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3cdefc6f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.10 12:59:30, skipping insertion in model container
[2019-10-07 00:59:30,588 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 12:59:24" (2/3) ...
[2019-10-07 00:59:30,589 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3cdefc6f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.10 12:59:30, skipping insertion in model container
[2019-10-07 00:59:30,590 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.10 12:59:30" (3/3) ...
[2019-10-07 00:59:30,601 INFO  L109   eAbstractionObserver]: Analyzing ICFG Problem04_label05.c
[2019-10-07 00:59:30,611 INFO  L152   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2019-10-07 00:59:30,622 INFO  L164   ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2019-10-07 00:59:30,634 INFO  L249      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2019-10-07 00:59:30,676 INFO  L373      AbstractCegarLoop]: Interprodecural is true
[2019-10-07 00:59:30,677 INFO  L374      AbstractCegarLoop]: Hoare is true
[2019-10-07 00:59:30,677 INFO  L375      AbstractCegarLoop]: Compute interpolants for FPandBP
[2019-10-07 00:59:30,677 INFO  L376      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2019-10-07 00:59:30,677 INFO  L377      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2019-10-07 00:59:30,677 INFO  L378      AbstractCegarLoop]: Difference is false
[2019-10-07 00:59:30,677 INFO  L379      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2019-10-07 00:59:30,677 INFO  L383      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2019-10-07 00:59:30,712 INFO  L276                IsEmpty]: Start isEmpty. Operand 785 states.
[2019-10-07 00:59:30,756 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 768
[2019-10-07 00:59:30,756 INFO  L377         BasicCegarLoop]: Found error trace
[2019-10-07 00:59:30,758 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 00:59:30,761 INFO  L410      AbstractCegarLoop]: === Iteration 1 === [calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-07 00:59:30,767 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-07 00:59:30,768 INFO  L82        PathProgramCache]: Analyzing trace with hash -1899134311, now seen corresponding path program 1 times
[2019-10-07 00:59:30,777 INFO  L150   tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2019-10-07 00:59:30,778 INFO  L231   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig
[2019-10-07 00:59:30,778 INFO  L117   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-07 00:59:30,779 INFO  L117   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-07 00:59:30,779 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-07 00:59:31,267 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-07 00:59:32,701 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 00:59:32,702 INFO  L286   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig
[2019-10-07 00:59:32,702 INFO  L211   tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-10-07 00:59:32,703 INFO  L224   tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2019-10-07 00:59:32,708 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 3 states
[2019-10-07 00:59:32,719 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2019-10-07 00:59:32,720 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2019-10-07 00:59:32,722 INFO  L87              Difference]: Start difference. First operand 785 states. Second operand 3 states.
[2019-10-07 00:59:36,971 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-10-07 00:59:36,971 INFO  L93              Difference]: Finished difference Result 2343 states and 4615 transitions.
[2019-10-07 00:59:36,972 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2019-10-07 00:59:36,974 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 767
[2019-10-07 00:59:36,978 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-10-07 00:59:37,015 INFO  L225             Difference]: With dead ends: 2343
[2019-10-07 00:59:37,016 INFO  L226             Difference]: Without dead ends: 1555
[2019-10-07 00:59:37,025 INFO  L606         BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 5 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2019-10-07 00:59:37,054 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 1555 states.
[2019-10-07 00:59:37,176 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 1555 to 1555.
[2019-10-07 00:59:37,178 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 1555 states.
[2019-10-07 00:59:37,187 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 1555 states to 1555 states and 3003 transitions.
[2019-10-07 00:59:37,189 INFO  L78                 Accepts]: Start accepts. Automaton has 1555 states and 3003 transitions. Word has length 767
[2019-10-07 00:59:37,192 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-10-07 00:59:37,192 INFO  L462      AbstractCegarLoop]: Abstraction has 1555 states and 3003 transitions.
[2019-10-07 00:59:37,192 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2019-10-07 00:59:37,192 INFO  L276                IsEmpty]: Start isEmpty. Operand 1555 states and 3003 transitions.
[2019-10-07 00:59:37,218 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 776
[2019-10-07 00:59:37,219 INFO  L377         BasicCegarLoop]: Found error trace
[2019-10-07 00:59:37,220 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 00:59:37,220 INFO  L410      AbstractCegarLoop]: === Iteration 2 === [calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-07 00:59:37,222 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-07 00:59:37,222 INFO  L82        PathProgramCache]: Analyzing trace with hash -1537904920, now seen corresponding path program 1 times
[2019-10-07 00:59:37,222 INFO  L150   tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2019-10-07 00:59:37,223 INFO  L231   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig
[2019-10-07 00:59:37,223 INFO  L117   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-07 00:59:37,223 INFO  L117   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-07 00:59:37,223 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-07 00:59:37,436 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-07 00:59:38,671 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 00:59:38,672 INFO  L286   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig
[2019-10-07 00:59:38,672 INFO  L211   tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-10-07 00:59:38,672 INFO  L224   tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2019-10-07 00:59:38,675 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 4 states
[2019-10-07 00:59:38,675 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2019-10-07 00:59:38,676 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2019-10-07 00:59:38,676 INFO  L87              Difference]: Start difference. First operand 1555 states and 3003 transitions. Second operand 4 states.
[2019-10-07 00:59:45,274 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-10-07 00:59:45,275 INFO  L93              Difference]: Finished difference Result 6201 states and 12123 transitions.
[2019-10-07 00:59:45,276 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2019-10-07 00:59:45,277 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 775
[2019-10-07 00:59:45,279 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-10-07 00:59:45,312 INFO  L225             Difference]: With dead ends: 6201
[2019-10-07 00:59:45,312 INFO  L226             Difference]: Without dead ends: 4651
[2019-10-07 00:59:45,321 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 00:59:45,329 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 4651 states.
[2019-10-07 00:59:45,504 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 4651 to 4651.
[2019-10-07 00:59:45,505 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 4651 states.
[2019-10-07 00:59:45,524 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 4651 states to 4651 states and 7819 transitions.
[2019-10-07 00:59:45,525 INFO  L78                 Accepts]: Start accepts. Automaton has 4651 states and 7819 transitions. Word has length 775
[2019-10-07 00:59:45,527 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-10-07 00:59:45,528 INFO  L462      AbstractCegarLoop]: Abstraction has 4651 states and 7819 transitions.
[2019-10-07 00:59:45,528 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2019-10-07 00:59:45,528 INFO  L276                IsEmpty]: Start isEmpty. Operand 4651 states and 7819 transitions.
[2019-10-07 00:59:45,576 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 794
[2019-10-07 00:59:45,577 INFO  L377         BasicCegarLoop]: Found error trace
[2019-10-07 00:59:45,578 INFO  L385         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]
[2019-10-07 00:59:45,641 INFO  L410      AbstractCegarLoop]: === Iteration 3 === [calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-07 00:59:45,642 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-07 00:59:45,643 INFO  L82        PathProgramCache]: Analyzing trace with hash -1233988476, now seen corresponding path program 1 times
[2019-10-07 00:59:45,643 INFO  L150   tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2019-10-07 00:59:45,643 INFO  L231   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig
[2019-10-07 00:59:45,644 INFO  L117   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-07 00:59:45,644 INFO  L117   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-07 00:59:45,645 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-07 00:59:45,790 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-07 00:59:47,446 INFO  L134       CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked.
[2019-10-07 00:59:47,446 INFO  L286   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig
[2019-10-07 00:59:47,447 INFO  L286   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3
[2019-10-07 00:59:47,447 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 00:59:47,709 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-07 00:59:47,713 INFO  L256         TraceCheckSpWp]: Trace formula consists of 1144 conjuncts, 10 conjunts are in the unsatisfiable core
[2019-10-07 00:59:47,744 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
[2019-10-07 00:59:48,372 INFO  L134       CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-10-07 00:59:48,373 INFO  L322         TraceCheckSpWp]: Computing backward predicates...
[2019-10-07 00:59:48,934 INFO  L134       CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-10-07 00:59:48,935 INFO  L211   tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences.
[2019-10-07 00:59:48,937 INFO  L224   tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4] total 5
[2019-10-07 00:59:48,940 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 3 states
[2019-10-07 00:59:48,941 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2019-10-07 00:59:48,941 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2019-10-07 00:59:48,941 INFO  L87              Difference]: Start difference. First operand 4651 states and 7819 transitions. Second operand 3 states.
[2019-10-07 00:59:53,569 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-10-07 00:59:53,570 INFO  L93              Difference]: Finished difference Result 13941 states and 23839 transitions.
[2019-10-07 00:59:53,573 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2019-10-07 00:59:53,573 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 793
[2019-10-07 00:59:53,575 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-10-07 00:59:53,640 INFO  L225             Difference]: With dead ends: 13941
[2019-10-07 00:59:53,641 INFO  L226             Difference]: Without dead ends: 9295
[2019-10-07 00:59:53,656 INFO  L606         BasicCegarLoop]: 0 DeclaredPredicates, 1596 GetRequests, 1581 SyntacticMatches, 12 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2019-10-07 00:59:53,672 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 9295 states.
[2019-10-07 00:59:53,962 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 9295 to 9295.
[2019-10-07 00:59:53,962 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 9295 states.
[2019-10-07 00:59:53,997 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 9295 states to 9295 states and 15121 transitions.
[2019-10-07 00:59:53,998 INFO  L78                 Accepts]: Start accepts. Automaton has 9295 states and 15121 transitions. Word has length 793
[2019-10-07 00:59:54,000 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-10-07 00:59:54,000 INFO  L462      AbstractCegarLoop]: Abstraction has 9295 states and 15121 transitions.
[2019-10-07 00:59:54,000 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2019-10-07 00:59:54,000 INFO  L276                IsEmpty]: Start isEmpty. Operand 9295 states and 15121 transitions.
[2019-10-07 00:59:54,041 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 818
[2019-10-07 00:59:54,041 INFO  L377         BasicCegarLoop]: Found error trace
[2019-10-07 00:59:54,042 INFO  L385         BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:59:54,247 WARN  L499      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2019-10-07 00:59:54,247 INFO  L410      AbstractCegarLoop]: === Iteration 4 === [calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-07 00:59:54,250 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-07 00:59:54,251 INFO  L82        PathProgramCache]: Analyzing trace with hash 845902164, now seen corresponding path program 1 times
[2019-10-07 00:59:54,251 INFO  L150   tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2019-10-07 00:59:54,251 INFO  L231   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig
[2019-10-07 00:59:54,252 INFO  L117   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-07 00:59:54,252 INFO  L117   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-07 00:59:54,253 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-07 00:59:54,346 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-07 00:59:55,197 INFO  L134       CoverageAnalysis]: Checked inductivity of 47 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-10-07 00:59:55,198 INFO  L286   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig
[2019-10-07 00:59:55,198 INFO  L211   tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-10-07 00:59:55,199 INFO  L224   tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6
[2019-10-07 00:59:55,202 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 6 states
[2019-10-07 00:59:55,203 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2019-10-07 00:59:55,203 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30
[2019-10-07 00:59:55,203 INFO  L87              Difference]: Start difference. First operand 9295 states and 15121 transitions. Second operand 6 states.
[2019-10-07 01:00:01,556 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-10-07 01:00:01,557 INFO  L93              Difference]: Finished difference Result 28297 states and 48159 transitions.
[2019-10-07 01:00:01,558 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2019-10-07 01:00:01,558 INFO  L78                 Accepts]: Start accepts. Automaton has 6 states. Word has length 817
[2019-10-07 01:00:01,559 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-10-07 01:00:01,735 INFO  L225             Difference]: With dead ends: 28297
[2019-10-07 01:00:01,735 INFO  L226             Difference]: Without dead ends: 19007
[2019-10-07 01:00:01,772 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 01:00:01,798 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 19007 states.
[2019-10-07 01:00:02,553 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 19007 to 18935.
[2019-10-07 01:00:02,553 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 18935 states.
[2019-10-07 01:00:02,610 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 18935 states to 18935 states and 29724 transitions.
[2019-10-07 01:00:02,611 INFO  L78                 Accepts]: Start accepts. Automaton has 18935 states and 29724 transitions. Word has length 817
[2019-10-07 01:00:02,612 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-10-07 01:00:02,612 INFO  L462      AbstractCegarLoop]: Abstraction has 18935 states and 29724 transitions.
[2019-10-07 01:00:02,612 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 6 states.
[2019-10-07 01:00:02,612 INFO  L276                IsEmpty]: Start isEmpty. Operand 18935 states and 29724 transitions.
[2019-10-07 01:00:02,680 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 849
[2019-10-07 01:00:02,680 INFO  L377         BasicCegarLoop]: Found error trace
[2019-10-07 01:00:02,681 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, 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]
[2019-10-07 01:00:02,681 INFO  L410      AbstractCegarLoop]: === Iteration 5 === [calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-07 01:00:02,681 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-07 01:00:02,682 INFO  L82        PathProgramCache]: Analyzing trace with hash 533645505, now seen corresponding path program 1 times
[2019-10-07 01:00:02,682 INFO  L150   tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2019-10-07 01:00:02,682 INFO  L231   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig
[2019-10-07 01:00:02,682 INFO  L117   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-07 01:00:02,683 INFO  L117   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-07 01:00:02,683 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-07 01:00:02,751 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-07 01:00:03,609 INFO  L134       CoverageAnalysis]: Checked inductivity of 106 backedges. 75 proven. 27 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked.
[2019-10-07 01:00:03,610 INFO  L286   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig
[2019-10-07 01:00:03,610 INFO  L286   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3
[2019-10-07 01:00:03,610 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 01:00:03,947 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-07 01:00:03,951 INFO  L256         TraceCheckSpWp]: Trace formula consists of 1257 conjuncts, 6 conjunts are in the unsatisfiable core
[2019-10-07 01:00:03,969 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
[2019-10-07 01:00:04,434 INFO  L134       CoverageAnalysis]: Checked inductivity of 106 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked.
[2019-10-07 01:00:04,435 INFO  L322         TraceCheckSpWp]: Computing backward predicates...
[2019-10-07 01:00:05,150 INFO  L134       CoverageAnalysis]: Checked inductivity of 106 backedges. 75 proven. 27 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked.
[2019-10-07 01:00:05,151 INFO  L211   tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences.
[2019-10-07 01:00:05,151 INFO  L224   tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 12
[2019-10-07 01:00:05,152 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 5 states
[2019-10-07 01:00:05,152 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2019-10-07 01:00:05,153 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132
[2019-10-07 01:00:05,153 INFO  L87              Difference]: Start difference. First operand 18935 states and 29724 transitions. Second operand 5 states.
[2019-10-07 01:00:11,823 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-10-07 01:00:11,823 INFO  L93              Difference]: Finished difference Result 56930 states and 92967 transitions.
[2019-10-07 01:00:11,824 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2019-10-07 01:00:11,824 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 848
[2019-10-07 01:00:11,824 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-10-07 01:00:11,991 INFO  L225             Difference]: With dead ends: 56930
[2019-10-07 01:00:11,991 INFO  L226             Difference]: Without dead ends: 38000
[2019-10-07 01:00:12,072 INFO  L606         BasicCegarLoop]: 0 DeclaredPredicates, 1703 GetRequests, 1692 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156
[2019-10-07 01:00:12,125 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 38000 states.
[2019-10-07 01:00:12,852 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 38000 to 36343.
[2019-10-07 01:00:12,852 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 36343 states.
[2019-10-07 01:00:12,937 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 36343 states to 36343 states and 52530 transitions.
[2019-10-07 01:00:12,938 INFO  L78                 Accepts]: Start accepts. Automaton has 36343 states and 52530 transitions. Word has length 848
[2019-10-07 01:00:12,938 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-10-07 01:00:12,938 INFO  L462      AbstractCegarLoop]: Abstraction has 36343 states and 52530 transitions.
[2019-10-07 01:00:12,938 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2019-10-07 01:00:12,939 INFO  L276                IsEmpty]: Start isEmpty. Operand 36343 states and 52530 transitions.
[2019-10-07 01:00:13,041 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 883
[2019-10-07 01:00:13,042 INFO  L377         BasicCegarLoop]: Found error trace
[2019-10-07 01:00:13,043 INFO  L385         BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:00:13,250 WARN  L499      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2019-10-07 01:00:13,251 INFO  L410      AbstractCegarLoop]: === Iteration 6 === [calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-07 01:00:13,252 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-07 01:00:13,252 INFO  L82        PathProgramCache]: Analyzing trace with hash -1392557607, now seen corresponding path program 1 times
[2019-10-07 01:00:13,253 INFO  L150   tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2019-10-07 01:00:13,253 INFO  L231   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig
[2019-10-07 01:00:13,254 INFO  L117   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-07 01:00:13,254 INFO  L117   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-07 01:00:13,254 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-07 01:00:13,338 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-07 01:00:14,891 INFO  L134       CoverageAnalysis]: Checked inductivity of 217 backedges. 124 proven. 28 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked.
[2019-10-07 01:00:14,891 INFO  L286   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig
[2019-10-07 01:00:14,891 INFO  L286   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3
[2019-10-07 01:00:14,892 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 01:00:15,207 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-07 01:00:15,212 INFO  L256         TraceCheckSpWp]: Trace formula consists of 1407 conjuncts, 4 conjunts are in the unsatisfiable core
[2019-10-07 01:00:15,230 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
[2019-10-07 01:00:15,781 INFO  L134       CoverageAnalysis]: Checked inductivity of 217 backedges. 155 proven. 2 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked.
[2019-10-07 01:00:15,781 INFO  L322         TraceCheckSpWp]: Computing backward predicates...
[2019-10-07 01:00:16,707 INFO  L134       CoverageAnalysis]: Checked inductivity of 217 backedges. 146 proven. 31 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked.
[2019-10-07 01:00:16,708 INFO  L286   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa
[2019-10-07 01:00:16,790 INFO  L162        IcfgInterpreter]: Started Sifa with 771 locations of interest
[2019-10-07 01:00:16,790 INFO  L169        IcfgInterpreter]: Building call graph
[2019-10-07 01:00:16,806 INFO  L174        IcfgInterpreter]: Initial procedures are [ULTIMATE.start]
[2019-10-07 01:00:16,818 INFO  L179        IcfgInterpreter]: Starting interpretation
[2019-10-07 01:00:16,821 INFO  L199        IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs
[2019-10-07 01:00:17,148 INFO  L199        IcfgInterpreter]: Interpreting procedure main with input of size 99 for LOIs
[2019-10-07 01:00:18,007 WARN  L499      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2019-10-07 01:00:18,008 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 01:00:18,020 INFO  L168              Benchmark]: Toolchain (without parser) took 56181.07 ms. Allocated memory was 145.8 MB in the beginning and 2.0 GB in the end (delta: 1.9 GB). Free memory was 87.1 MB in the beginning and 570.9 MB in the end (delta: -483.8 MB). Peak memory consumption was 1.4 GB. Max. memory is 7.1 GB.
[2019-10-07 01:00:18,023 INFO  L168              Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 145.8 MB. Free memory was 120.9 MB in the beginning and 120.6 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB.
[2019-10-07 01:00:18,025 INFO  L168              Benchmark]: CACSL2BoogieTranslator took 2860.37 ms. Allocated memory was 145.8 MB in the beginning and 251.1 MB in the end (delta: 105.4 MB). Free memory was 86.7 MB in the beginning and 165.0 MB in the end (delta: -78.4 MB). Peak memory consumption was 111.3 MB. Max. memory is 7.1 GB.
[2019-10-07 01:00:18,027 INFO  L168              Benchmark]: Boogie Preprocessor took 313.36 ms. Allocated memory is still 251.1 MB. Free memory was 165.0 MB in the beginning and 136.3 MB in the end (delta: 28.7 MB). Peak memory consumption was 28.7 MB. Max. memory is 7.1 GB.
[2019-10-07 01:00:18,030 INFO  L168              Benchmark]: RCFGBuilder took 5570.81 ms. Allocated memory was 251.1 MB in the beginning and 389.5 MB in the end (delta: 138.4 MB). Free memory was 136.3 MB in the beginning and 262.1 MB in the end (delta: -125.7 MB). Peak memory consumption was 226.1 MB. Max. memory is 7.1 GB.
[2019-10-07 01:00:18,035 INFO  L168              Benchmark]: TraceAbstraction took 47430.12 ms. Allocated memory was 389.5 MB in the beginning and 2.0 GB in the end (delta: 1.6 GB). Free memory was 262.1 MB in the beginning and 570.9 MB in the end (delta: -308.8 MB). Peak memory consumption was 1.3 GB. Max. memory is 7.1 GB.
[2019-10-07 01:00:18,041 INFO  L335   ainManager$Toolchain]: #######################  End [Toolchain 1] #######################
 --- Results ---
 * Results from de.uni_freiburg.informatik.ultimate.core:
  - StatisticsResult: Toolchain Benchmarks
    Benchmark results are:
 * CDTParser took 0.22 ms. Allocated memory is still 145.8 MB. Free memory was 120.9 MB in the beginning and 120.6 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB.
 * CACSL2BoogieTranslator took 2860.37 ms. Allocated memory was 145.8 MB in the beginning and 251.1 MB in the end (delta: 105.4 MB). Free memory was 86.7 MB in the beginning and 165.0 MB in the end (delta: -78.4 MB). Peak memory consumption was 111.3 MB. Max. memory is 7.1 GB.
 * Boogie Preprocessor took 313.36 ms. Allocated memory is still 251.1 MB. Free memory was 165.0 MB in the beginning and 136.3 MB in the end (delta: 28.7 MB). Peak memory consumption was 28.7 MB. Max. memory is 7.1 GB.
 * RCFGBuilder took 5570.81 ms. Allocated memory was 251.1 MB in the beginning and 389.5 MB in the end (delta: 138.4 MB). Free memory was 136.3 MB in the beginning and 262.1 MB in the end (delta: -125.7 MB). Peak memory consumption was 226.1 MB. Max. memory is 7.1 GB.
 * TraceAbstraction took 47430.12 ms. Allocated memory was 389.5 MB in the beginning and 2.0 GB in the end (delta: 1.6 GB). Free memory was 262.1 MB in the beginning and 570.9 MB in the end (delta: -308.8 MB). Peak memory consumption was 1.3 GB. 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...