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/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.BOUNDED-6.pals.c.v+sep-reducer.c


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


This is Ultimate 0.1.24-f4eb214f-m
[2019-10-13 23:21:53,389 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2019-10-13 23:21:53,392 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2019-10-13 23:21:53,409 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2019-10-13 23:21:53,409 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2019-10-13 23:21:53,411 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2019-10-13 23:21:53,412 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2019-10-13 23:21:53,414 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2019-10-13 23:21:53,415 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2019-10-13 23:21:53,416 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
[2019-10-13 23:21:53,417 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
[2019-10-13 23:21:53,418 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2019-10-13 23:21:53,419 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2019-10-13 23:21:53,420 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2019-10-13 23:21:53,421 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2019-10-13 23:21:53,422 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2019-10-13 23:21:53,423 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2019-10-13 23:21:53,424 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2019-10-13 23:21:53,425 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2019-10-13 23:21:53,427 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2019-10-13 23:21:53,429 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2019-10-13 23:21:53,430 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2019-10-13 23:21:53,435 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2019-10-13 23:21:53,436 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2019-10-13 23:21:53,439 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2019-10-13 23:21:53,440 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2019-10-13 23:21:53,440 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2019-10-13 23:21:53,441 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2019-10-13 23:21:53,441 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
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[2019-10-13 23:21:53,445 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
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[2019-10-13 23:21:53,451 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
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[2019-10-13 23:21:53,453 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2019-10-13 23:21:53,453 INFO  L101        SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf
[2019-10-13 23:21:53,470 INFO  L113        SettingsManager]: Loading preferences was successful
[2019-10-13 23:21:53,470 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2019-10-13 23:21:53,471 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2019-10-13 23:21:53,471 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2019-10-13 23:21:53,472 INFO  L138        SettingsManager]:  * Use SBE=true
[2019-10-13 23:21:53,472 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2019-10-13 23:21:53,472 INFO  L138        SettingsManager]:  * sizeof long=4
[2019-10-13 23:21:53,472 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2019-10-13 23:21:53,473 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2019-10-13 23:21:53,473 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2019-10-13 23:21:53,473 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2019-10-13 23:21:53,473 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2019-10-13 23:21:53,473 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2019-10-13 23:21:53,474 INFO  L138        SettingsManager]:  * sizeof long double=12
[2019-10-13 23:21:53,474 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2019-10-13 23:21:53,474 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2019-10-13 23:21:53,474 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2019-10-13 23:21:53,474 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2019-10-13 23:21:53,475 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2019-10-13 23:21:53,475 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2019-10-13 23:21:53,475 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2019-10-13 23:21:53,475 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2019-10-13 23:21:53,475 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2019-10-13 23:21:53,476 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2019-10-13 23:21:53,476 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2019-10-13 23:21:53,476 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2019-10-13 23:21:53,476 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2019-10-13 23:21:53,476 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2019-10-13 23:21:53,477 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
[2019-10-13 23:21:53,750 INFO  L81    nceAwareModelManager]: Repository-Root is: /tmp
[2019-10-13 23:21:53,764 INFO  L258   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2019-10-13 23:21:53,768 INFO  L214   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2019-10-13 23:21:53,769 INFO  L271        PluginConnector]: Initializing CDTParser...
[2019-10-13 23:21:53,770 INFO  L275        PluginConnector]: CDTParser initialized
[2019-10-13 23:21:53,770 INFO  L428   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.BOUNDED-6.pals.c.v+sep-reducer.c
[2019-10-13 23:21:53,829 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d89165e07/88ea7e0e8f244c2aa0173e3f8c76b4b8/FLAG3d65602d3
[2019-10-13 23:21:54,500 INFO  L306              CDTParser]: Found 1 translation units.
[2019-10-13 23:21:54,502 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.BOUNDED-6.pals.c.v+sep-reducer.c
[2019-10-13 23:21:54,529 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d89165e07/88ea7e0e8f244c2aa0173e3f8c76b4b8/FLAG3d65602d3
[2019-10-13 23:21:54,683 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d89165e07/88ea7e0e8f244c2aa0173e3f8c76b4b8
[2019-10-13 23:21:54,692 INFO  L296   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2019-10-13 23:21:54,693 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2019-10-13 23:21:54,694 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2019-10-13 23:21:54,695 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2019-10-13 23:21:54,698 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2019-10-13 23:21:54,699 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:21:54" (1/1) ...
[2019-10-13 23:21:54,702 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4061229e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:21:54, skipping insertion in model container
[2019-10-13 23:21:54,702 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:21:54" (1/1) ...
[2019-10-13 23:21:54,710 INFO  L142         MainTranslator]: Starting translation in SV-COMP mode 
[2019-10-13 23:21:54,855 INFO  L173         MainTranslator]: Built tables and reachable declarations
[2019-10-13 23:21:55,772 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2019-10-13 23:21:55,805 INFO  L188         MainTranslator]: Completed pre-run
[2019-10-13 23:21:56,162 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2019-10-13 23:21:56,190 INFO  L192         MainTranslator]: Completed translation
[2019-10-13 23:21:56,191 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:21:56 WrapperNode
[2019-10-13 23:21:56,191 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2019-10-13 23:21:56,192 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2019-10-13 23:21:56,192 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2019-10-13 23:21:56,193 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2019-10-13 23:21:56,211 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:21:56" (1/1) ...
[2019-10-13 23:21:56,211 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:21:56" (1/1) ...
[2019-10-13 23:21:56,255 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:21:56" (1/1) ...
[2019-10-13 23:21:56,256 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:21:56" (1/1) ...
[2019-10-13 23:21:56,348 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:21:56" (1/1) ...
[2019-10-13 23:21:56,399 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:21:56" (1/1) ...
[2019-10-13 23:21:56,411 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:21:56" (1/1) ...
[2019-10-13 23:21:56,440 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2019-10-13 23:21:56,441 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2019-10-13 23:21:56,441 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2019-10-13 23:21:56,442 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2019-10-13 23:21:56,443 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:21:56" (1/1) ...
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2019-10-13 23:21:56,513 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2019-10-13 23:21:56,513 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2019-10-13 23:21:56,514 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2019-10-13 23:21:56,514 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2019-10-13 23:21:56,514 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool
[2019-10-13 23:21:56,514 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char
[2019-10-13 23:21:56,515 INFO  L130     BoogieDeclarations]: Found specification of procedure assert
[2019-10-13 23:21:56,515 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_assume
[2019-10-13 23:21:56,515 INFO  L130     BoogieDeclarations]: Found specification of procedure read
[2019-10-13 23:21:56,515 INFO  L130     BoogieDeclarations]: Found specification of procedure write
[2019-10-13 23:21:56,515 INFO  L130     BoogieDeclarations]: Found specification of procedure node1
[2019-10-13 23:21:56,516 INFO  L130     BoogieDeclarations]: Found specification of procedure node2
[2019-10-13 23:21:56,516 INFO  L130     BoogieDeclarations]: Found specification of procedure node3
[2019-10-13 23:21:56,516 INFO  L130     BoogieDeclarations]: Found specification of procedure init
[2019-10-13 23:21:56,516 INFO  L130     BoogieDeclarations]: Found specification of procedure check
[2019-10-13 23:21:56,517 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2019-10-13 23:21:56,517 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2019-10-13 23:21:56,517 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2019-10-13 23:22:00,429 INFO  L279             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2019-10-13 23:22:00,430 INFO  L284             CfgBuilder]: Removed 0 assume(true) statements.
[2019-10-13 23:22:00,433 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:22:00 BoogieIcfgContainer
[2019-10-13 23:22:00,433 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2019-10-13 23:22:00,436 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2019-10-13 23:22:00,436 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2019-10-13 23:22:00,440 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2019-10-13 23:22:00,441 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 11:21:54" (1/3) ...
[2019-10-13 23:22:00,442 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@544092c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:22:00, skipping insertion in model container
[2019-10-13 23:22:00,442 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:21:56" (2/3) ...
[2019-10-13 23:22:00,443 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@544092c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:22:00, skipping insertion in model container
[2019-10-13 23:22:00,443 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:22:00" (3/3) ...
[2019-10-13 23:22:00,455 INFO  L109   eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.3.ufo.BOUNDED-6.pals.c.v+sep-reducer.c
[2019-10-13 23:22:00,476 INFO  L152   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2019-10-13 23:22:00,490 INFO  L164   ceAbstractionStarter]: Appying trace abstraction to program that has 6 error locations.
[2019-10-13 23:22:00,505 INFO  L249      AbstractCegarLoop]: Starting to check reachability of 6 error locations.
[2019-10-13 23:22:00,562 INFO  L373      AbstractCegarLoop]: Interprodecural is true
[2019-10-13 23:22:00,562 INFO  L374      AbstractCegarLoop]: Hoare is true
[2019-10-13 23:22:00,562 INFO  L375      AbstractCegarLoop]: Compute interpolants for FPandBP
[2019-10-13 23:22:00,563 INFO  L376      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2019-10-13 23:22:00,563 INFO  L377      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2019-10-13 23:22:00,563 INFO  L378      AbstractCegarLoop]: Difference is false
[2019-10-13 23:22:00,563 INFO  L379      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2019-10-13 23:22:00,563 INFO  L383      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2019-10-13 23:22:00,613 INFO  L276                IsEmpty]: Start isEmpty. Operand 1240 states.
[2019-10-13 23:22:00,651 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 56
[2019-10-13 23:22:00,652 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-13 23:22:00,653 INFO  L380         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-10-13 23:22:00,655 INFO  L410      AbstractCegarLoop]: === Iteration 1 === [mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-13 23:22:00,661 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-13 23:22:00,662 INFO  L82        PathProgramCache]: Analyzing trace with hash 1049131971, now seen corresponding path program 1 times
[2019-10-13 23:22:00,672 INFO  L157   tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2019-10-13 23:22:00,672 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219759128]
[2019-10-13 23:22:00,672 INFO  L116   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 23:22:00,673 INFO  L116   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 23:22:00,673 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-13 23:22:01,132 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 23:22:01,423 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-10-13 23:22:01,425 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219759128]
[2019-10-13 23:22:01,427 INFO  L223   tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-10-13 23:22:01,427 INFO  L236   tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2019-10-13 23:22:01,428 INFO  L342   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272871814]
[2019-10-13 23:22:01,434 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 5 states
[2019-10-13 23:22:01,435 INFO  L137   tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2019-10-13 23:22:01,452 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2019-10-13 23:22:01,453 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2019-10-13 23:22:01,456 INFO  L87              Difference]: Start difference. First operand 1240 states. Second operand 5 states.
[2019-10-13 23:22:03,493 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-10-13 23:22:03,494 INFO  L93              Difference]: Finished difference Result 2377 states and 4076 transitions.
[2019-10-13 23:22:03,494 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2019-10-13 23:22:03,496 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 55
[2019-10-13 23:22:03,497 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-10-13 23:22:03,524 INFO  L225             Difference]: With dead ends: 2377
[2019-10-13 23:22:03,524 INFO  L226             Difference]: Without dead ends: 1498
[2019-10-13 23:22:03,533 INFO  L600         BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42
[2019-10-13 23:22:03,560 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 1498 states.
[2019-10-13 23:22:03,655 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 1498 to 1492.
[2019-10-13 23:22:03,657 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 1492 states.
[2019-10-13 23:22:03,663 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 1492 states to 1492 states and 1900 transitions.
[2019-10-13 23:22:03,665 INFO  L78                 Accepts]: Start accepts. Automaton has 1492 states and 1900 transitions. Word has length 55
[2019-10-13 23:22:03,665 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-10-13 23:22:03,665 INFO  L462      AbstractCegarLoop]: Abstraction has 1492 states and 1900 transitions.
[2019-10-13 23:22:03,665 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2019-10-13 23:22:03,666 INFO  L276                IsEmpty]: Start isEmpty. Operand 1492 states and 1900 transitions.
[2019-10-13 23:22:03,670 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 57
[2019-10-13 23:22:03,670 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-13 23:22:03,670 INFO  L380         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-10-13 23:22:03,671 INFO  L410      AbstractCegarLoop]: === Iteration 2 === [mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-13 23:22:03,671 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-13 23:22:03,671 INFO  L82        PathProgramCache]: Analyzing trace with hash -853550216, now seen corresponding path program 1 times
[2019-10-13 23:22:03,671 INFO  L157   tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2019-10-13 23:22:03,672 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336144990]
[2019-10-13 23:22:03,672 INFO  L116   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 23:22:03,672 INFO  L116   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 23:22:03,672 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-13 23:22:03,732 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 23:22:03,968 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-10-13 23:22:03,969 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336144990]
[2019-10-13 23:22:03,969 INFO  L223   tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-10-13 23:22:03,970 INFO  L236   tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6
[2019-10-13 23:22:03,970 INFO  L342   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169259945]
[2019-10-13 23:22:03,972 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 6 states
[2019-10-13 23:22:03,973 INFO  L137   tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2019-10-13 23:22:03,973 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2019-10-13 23:22:03,973 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30
[2019-10-13 23:22:03,973 INFO  L87              Difference]: Start difference. First operand 1492 states and 1900 transitions. Second operand 6 states.
[2019-10-13 23:22:05,379 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-10-13 23:22:05,380 INFO  L93              Difference]: Finished difference Result 3286 states and 4192 transitions.
[2019-10-13 23:22:05,381 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2019-10-13 23:22:05,381 INFO  L78                 Accepts]: Start accepts. Automaton has 6 states. Word has length 56
[2019-10-13 23:22:05,382 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-10-13 23:22:05,399 INFO  L225             Difference]: With dead ends: 3286
[2019-10-13 23:22:05,399 INFO  L226             Difference]: Without dead ends: 2368
[2019-10-13 23:22:05,404 INFO  L600         BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56
[2019-10-13 23:22:05,410 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 2368 states.
[2019-10-13 23:22:05,638 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 2368 to 2345.
[2019-10-13 23:22:05,639 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 2345 states.
[2019-10-13 23:22:05,654 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 2345 states to 2345 states and 2997 transitions.
[2019-10-13 23:22:05,655 INFO  L78                 Accepts]: Start accepts. Automaton has 2345 states and 2997 transitions. Word has length 56
[2019-10-13 23:22:05,656 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-10-13 23:22:05,656 INFO  L462      AbstractCegarLoop]: Abstraction has 2345 states and 2997 transitions.
[2019-10-13 23:22:05,657 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 6 states.
[2019-10-13 23:22:05,657 INFO  L276                IsEmpty]: Start isEmpty. Operand 2345 states and 2997 transitions.
[2019-10-13 23:22:05,665 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 57
[2019-10-13 23:22:05,665 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-13 23:22:05,666 INFO  L380         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-10-13 23:22:05,668 INFO  L410      AbstractCegarLoop]: === Iteration 3 === [mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-13 23:22:05,668 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-13 23:22:05,668 INFO  L82        PathProgramCache]: Analyzing trace with hash 618054128, now seen corresponding path program 1 times
[2019-10-13 23:22:05,669 INFO  L157   tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2019-10-13 23:22:05,670 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465705106]
[2019-10-13 23:22:05,670 INFO  L116   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 23:22:05,670 INFO  L116   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 23:22:05,671 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-13 23:22:05,805 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 23:22:05,988 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-10-13 23:22:05,990 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465705106]
[2019-10-13 23:22:05,990 INFO  L223   tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-10-13 23:22:05,991 INFO  L236   tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6
[2019-10-13 23:22:05,991 INFO  L342   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630392155]
[2019-10-13 23:22:05,991 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 6 states
[2019-10-13 23:22:05,992 INFO  L137   tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2019-10-13 23:22:05,993 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2019-10-13 23:22:05,993 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30
[2019-10-13 23:22:05,993 INFO  L87              Difference]: Start difference. First operand 2345 states and 2997 transitions. Second operand 6 states.
[2019-10-13 23:22:07,489 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-10-13 23:22:07,490 INFO  L93              Difference]: Finished difference Result 5347 states and 6862 transitions.
[2019-10-13 23:22:07,490 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2019-10-13 23:22:07,490 INFO  L78                 Accepts]: Start accepts. Automaton has 6 states. Word has length 56
[2019-10-13 23:22:07,491 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-10-13 23:22:07,509 INFO  L225             Difference]: With dead ends: 5347
[2019-10-13 23:22:07,510 INFO  L226             Difference]: Without dead ends: 3865
[2019-10-13 23:22:07,514 INFO  L600         BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56
[2019-10-13 23:22:07,520 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 3865 states.
[2019-10-13 23:22:07,751 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 3865 to 3849.
[2019-10-13 23:22:07,751 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 3849 states.
[2019-10-13 23:22:07,766 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 3849 states to 3849 states and 4898 transitions.
[2019-10-13 23:22:07,767 INFO  L78                 Accepts]: Start accepts. Automaton has 3849 states and 4898 transitions. Word has length 56
[2019-10-13 23:22:07,767 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-10-13 23:22:07,767 INFO  L462      AbstractCegarLoop]: Abstraction has 3849 states and 4898 transitions.
[2019-10-13 23:22:07,768 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 6 states.
[2019-10-13 23:22:07,768 INFO  L276                IsEmpty]: Start isEmpty. Operand 3849 states and 4898 transitions.
[2019-10-13 23:22:07,772 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 59
[2019-10-13 23:22:07,772 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-13 23:22:07,772 INFO  L380         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-10-13 23:22:07,773 INFO  L410      AbstractCegarLoop]: === Iteration 4 === [mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-13 23:22:07,773 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-13 23:22:07,773 INFO  L82        PathProgramCache]: Analyzing trace with hash -1627295014, now seen corresponding path program 1 times
[2019-10-13 23:22:07,773 INFO  L157   tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2019-10-13 23:22:07,773 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713300599]
[2019-10-13 23:22:07,774 INFO  L116   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 23:22:07,774 INFO  L116   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 23:22:07,774 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-13 23:22:07,843 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 23:22:07,995 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-10-13 23:22:07,995 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713300599]
[2019-10-13 23:22:07,996 INFO  L223   tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-10-13 23:22:07,996 INFO  L236   tionRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9
[2019-10-13 23:22:07,996 INFO  L342   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265848969]
[2019-10-13 23:22:07,996 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 9 states
[2019-10-13 23:22:07,997 INFO  L137   tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2019-10-13 23:22:07,997 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants.
[2019-10-13 23:22:07,997 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72
[2019-10-13 23:22:07,997 INFO  L87              Difference]: Start difference. First operand 3849 states and 4898 transitions. Second operand 9 states.
[2019-10-13 23:22:11,291 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-10-13 23:22:11,292 INFO  L93              Difference]: Finished difference Result 5687 states and 7418 transitions.
[2019-10-13 23:22:11,292 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. 
[2019-10-13 23:22:11,293 INFO  L78                 Accepts]: Start accepts. Automaton has 9 states. Word has length 58
[2019-10-13 23:22:11,293 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-10-13 23:22:11,331 INFO  L225             Difference]: With dead ends: 5687
[2019-10-13 23:22:11,331 INFO  L226             Difference]: Without dead ends: 5681
[2019-10-13 23:22:11,338 INFO  L600         BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=207, Invalid=549, Unknown=0, NotChecked=0, Total=756
[2019-10-13 23:22:11,348 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 5681 states.
[2019-10-13 23:22:11,676 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 5681 to 3849.
[2019-10-13 23:22:11,677 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 3849 states.
[2019-10-13 23:22:11,688 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 3849 states to 3849 states and 4897 transitions.
[2019-10-13 23:22:11,688 INFO  L78                 Accepts]: Start accepts. Automaton has 3849 states and 4897 transitions. Word has length 58
[2019-10-13 23:22:11,689 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-10-13 23:22:11,689 INFO  L462      AbstractCegarLoop]: Abstraction has 3849 states and 4897 transitions.
[2019-10-13 23:22:11,690 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 9 states.
[2019-10-13 23:22:11,690 INFO  L276                IsEmpty]: Start isEmpty. Operand 3849 states and 4897 transitions.
[2019-10-13 23:22:11,696 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 59
[2019-10-13 23:22:11,696 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-13 23:22:11,696 INFO  L380         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-10-13 23:22:11,697 INFO  L410      AbstractCegarLoop]: === Iteration 5 === [mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-13 23:22:11,697 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-13 23:22:11,697 INFO  L82        PathProgramCache]: Analyzing trace with hash 1670672239, now seen corresponding path program 1 times
[2019-10-13 23:22:11,698 INFO  L157   tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2019-10-13 23:22:11,698 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053841315]
[2019-10-13 23:22:11,698 INFO  L116   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 23:22:11,698 INFO  L116   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 23:22:11,698 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-13 23:22:11,752 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 23:22:11,896 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-10-13 23:22:11,897 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053841315]
[2019-10-13 23:22:11,897 INFO  L223   tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-10-13 23:22:11,897 INFO  L236   tionRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9
[2019-10-13 23:22:11,898 INFO  L342   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134265369]
[2019-10-13 23:22:11,899 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 9 states
[2019-10-13 23:22:11,900 INFO  L137   tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2019-10-13 23:22:11,900 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants.
[2019-10-13 23:22:11,901 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72
[2019-10-13 23:22:11,901 INFO  L87              Difference]: Start difference. First operand 3849 states and 4897 transitions. Second operand 9 states.
[2019-10-13 23:22:15,769 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-10-13 23:22:15,769 INFO  L93              Difference]: Finished difference Result 9189 states and 12006 transitions.
[2019-10-13 23:22:15,775 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. 
[2019-10-13 23:22:15,775 INFO  L78                 Accepts]: Start accepts. Automaton has 9 states. Word has length 58
[2019-10-13 23:22:15,776 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-10-13 23:22:15,817 INFO  L225             Difference]: With dead ends: 9189
[2019-10-13 23:22:15,817 INFO  L226             Difference]: Without dead ends: 8864
[2019-10-13 23:22:15,822 INFO  L600         BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=162, Invalid=438, Unknown=0, NotChecked=0, Total=600
[2019-10-13 23:22:15,832 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 8864 states.
[2019-10-13 23:22:16,176 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 8864 to 3849.
[2019-10-13 23:22:16,176 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 3849 states.
[2019-10-13 23:22:16,183 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 3849 states to 3849 states and 4896 transitions.
[2019-10-13 23:22:16,184 INFO  L78                 Accepts]: Start accepts. Automaton has 3849 states and 4896 transitions. Word has length 58
[2019-10-13 23:22:16,184 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-10-13 23:22:16,184 INFO  L462      AbstractCegarLoop]: Abstraction has 3849 states and 4896 transitions.
[2019-10-13 23:22:16,184 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 9 states.
[2019-10-13 23:22:16,185 INFO  L276                IsEmpty]: Start isEmpty. Operand 3849 states and 4896 transitions.
[2019-10-13 23:22:16,188 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 59
[2019-10-13 23:22:16,188 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-13 23:22:16,188 INFO  L380         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-10-13 23:22:16,189 INFO  L410      AbstractCegarLoop]: === Iteration 6 === [mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-13 23:22:16,189 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-13 23:22:16,189 INFO  L82        PathProgramCache]: Analyzing trace with hash 1060275482, now seen corresponding path program 1 times
[2019-10-13 23:22:16,189 INFO  L157   tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2019-10-13 23:22:16,190 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612248965]
[2019-10-13 23:22:16,190 INFO  L116   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 23:22:16,190 INFO  L116   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 23:22:16,190 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-13 23:22:16,237 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 23:22:16,379 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-10-13 23:22:16,380 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612248965]
[2019-10-13 23:22:16,381 INFO  L223   tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-10-13 23:22:16,381 INFO  L236   tionRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8
[2019-10-13 23:22:16,381 INFO  L342   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687536041]
[2019-10-13 23:22:16,381 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 8 states
[2019-10-13 23:22:16,382 INFO  L137   tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2019-10-13 23:22:16,382 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2019-10-13 23:22:16,382 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56
[2019-10-13 23:22:16,383 INFO  L87              Difference]: Start difference. First operand 3849 states and 4896 transitions. Second operand 8 states.
[2019-10-13 23:22:19,032 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-10-13 23:22:19,032 INFO  L93              Difference]: Finished difference Result 8269 states and 11100 transitions.
[2019-10-13 23:22:19,036 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. 
[2019-10-13 23:22:19,036 INFO  L78                 Accepts]: Start accepts. Automaton has 8 states. Word has length 58
[2019-10-13 23:22:19,037 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-10-13 23:22:19,068 INFO  L225             Difference]: With dead ends: 8269
[2019-10-13 23:22:19,069 INFO  L226             Difference]: Without dead ends: 7254
[2019-10-13 23:22:19,073 INFO  L600         BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306
[2019-10-13 23:22:19,082 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 7254 states.
[2019-10-13 23:22:19,353 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 7254 to 3849.
[2019-10-13 23:22:19,353 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 3849 states.
[2019-10-13 23:22:19,360 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 3849 states to 3849 states and 4895 transitions.
[2019-10-13 23:22:19,367 INFO  L78                 Accepts]: Start accepts. Automaton has 3849 states and 4895 transitions. Word has length 58
[2019-10-13 23:22:19,368 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-10-13 23:22:19,368 INFO  L462      AbstractCegarLoop]: Abstraction has 3849 states and 4895 transitions.
[2019-10-13 23:22:19,368 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 8 states.
[2019-10-13 23:22:19,368 INFO  L276                IsEmpty]: Start isEmpty. Operand 3849 states and 4895 transitions.
[2019-10-13 23:22:19,375 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 60
[2019-10-13 23:22:19,376 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-13 23:22:19,376 INFO  L380         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-10-13 23:22:19,376 INFO  L410      AbstractCegarLoop]: === Iteration 7 === [mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-13 23:22:19,376 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-13 23:22:19,377 INFO  L82        PathProgramCache]: Analyzing trace with hash 1321462413, now seen corresponding path program 1 times
[2019-10-13 23:22:19,377 INFO  L157   tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2019-10-13 23:22:19,377 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974226464]
[2019-10-13 23:22:19,377 INFO  L116   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 23:22:19,378 INFO  L116   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 23:22:19,378 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-13 23:22:19,415 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 23:22:19,477 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-10-13 23:22:19,477 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974226464]
[2019-10-13 23:22:19,477 INFO  L223   tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-10-13 23:22:19,478 INFO  L236   tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2019-10-13 23:22:19,478 INFO  L342   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939610997]
[2019-10-13 23:22:19,479 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 3 states
[2019-10-13 23:22:19,479 INFO  L137   tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2019-10-13 23:22:19,479 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2019-10-13 23:22:19,479 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2019-10-13 23:22:19,480 INFO  L87              Difference]: Start difference. First operand 3849 states and 4895 transitions. Second operand 3 states.
[2019-10-13 23:22:20,001 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-10-13 23:22:20,002 INFO  L93              Difference]: Finished difference Result 6822 states and 8777 transitions.
[2019-10-13 23:22:20,002 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2019-10-13 23:22:20,002 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 59
[2019-10-13 23:22:20,004 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-10-13 23:22:20,031 INFO  L225             Difference]: With dead ends: 6822
[2019-10-13 23:22:20,031 INFO  L226             Difference]: Without dead ends: 4669
[2019-10-13 23:22:20,039 INFO  L600         BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2019-10-13 23:22:20,045 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 4669 states.
[2019-10-13 23:22:20,401 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 4669 to 4663.
[2019-10-13 23:22:20,402 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 4663 states.
[2019-10-13 23:22:20,410 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 4663 states to 4663 states and 5839 transitions.
[2019-10-13 23:22:20,411 INFO  L78                 Accepts]: Start accepts. Automaton has 4663 states and 5839 transitions. Word has length 59
[2019-10-13 23:22:20,414 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-10-13 23:22:20,414 INFO  L462      AbstractCegarLoop]: Abstraction has 4663 states and 5839 transitions.
[2019-10-13 23:22:20,414 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2019-10-13 23:22:20,414 INFO  L276                IsEmpty]: Start isEmpty. Operand 4663 states and 5839 transitions.
[2019-10-13 23:22:20,419 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 60
[2019-10-13 23:22:20,419 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-13 23:22:20,419 INFO  L380         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-10-13 23:22:20,420 INFO  L410      AbstractCegarLoop]: === Iteration 8 === [mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-13 23:22:20,420 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-13 23:22:20,420 INFO  L82        PathProgramCache]: Analyzing trace with hash 1942209389, now seen corresponding path program 1 times
[2019-10-13 23:22:20,420 INFO  L157   tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2019-10-13 23:22:20,420 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118955687]
[2019-10-13 23:22:20,421 INFO  L116   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 23:22:20,421 INFO  L116   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 23:22:20,421 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-13 23:22:20,456 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 23:22:20,510 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-10-13 23:22:20,511 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118955687]
[2019-10-13 23:22:20,511 INFO  L223   tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-10-13 23:22:20,511 INFO  L236   tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2019-10-13 23:22:20,512 INFO  L342   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176145870]
[2019-10-13 23:22:20,512 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 3 states
[2019-10-13 23:22:20,512 INFO  L137   tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2019-10-13 23:22:20,512 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2019-10-13 23:22:20,513 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2019-10-13 23:22:20,513 INFO  L87              Difference]: Start difference. First operand 4663 states and 5839 transitions. Second operand 3 states.
[2019-10-13 23:22:20,821 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-10-13 23:22:20,821 INFO  L93              Difference]: Finished difference Result 6941 states and 9014 transitions.
[2019-10-13 23:22:20,821 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2019-10-13 23:22:20,821 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 59
[2019-10-13 23:22:20,822 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-10-13 23:22:20,837 INFO  L225             Difference]: With dead ends: 6941
[2019-10-13 23:22:20,837 INFO  L226             Difference]: Without dead ends: 5280
[2019-10-13 23:22:20,843 INFO  L600         BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2019-10-13 23:22:20,850 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 5280 states.
[2019-10-13 23:22:21,316 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 5280 to 4904.
[2019-10-13 23:22:21,316 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 4904 states.
[2019-10-13 23:22:21,323 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 4904 states to 4904 states and 6223 transitions.
[2019-10-13 23:22:21,324 INFO  L78                 Accepts]: Start accepts. Automaton has 4904 states and 6223 transitions. Word has length 59
[2019-10-13 23:22:21,324 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-10-13 23:22:21,324 INFO  L462      AbstractCegarLoop]: Abstraction has 4904 states and 6223 transitions.
[2019-10-13 23:22:21,324 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2019-10-13 23:22:21,324 INFO  L276                IsEmpty]: Start isEmpty. Operand 4904 states and 6223 transitions.
[2019-10-13 23:22:21,328 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 60
[2019-10-13 23:22:21,329 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-13 23:22:21,329 INFO  L380         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-10-13 23:22:21,329 INFO  L410      AbstractCegarLoop]: === Iteration 9 === [mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-13 23:22:21,329 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-13 23:22:21,329 INFO  L82        PathProgramCache]: Analyzing trace with hash -88721283, now seen corresponding path program 1 times
[2019-10-13 23:22:21,330 INFO  L157   tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2019-10-13 23:22:21,330 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131258501]
[2019-10-13 23:22:21,330 INFO  L116   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 23:22:21,330 INFO  L116   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 23:22:21,330 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-13 23:22:21,375 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 23:22:21,431 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-10-13 23:22:21,432 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131258501]
[2019-10-13 23:22:21,433 INFO  L223   tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-10-13 23:22:21,433 INFO  L236   tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2019-10-13 23:22:21,433 INFO  L342   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735570546]
[2019-10-13 23:22:21,434 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 3 states
[2019-10-13 23:22:21,434 INFO  L137   tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2019-10-13 23:22:21,435 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2019-10-13 23:22:21,435 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2019-10-13 23:22:21,435 INFO  L87              Difference]: Start difference. First operand 4904 states and 6223 transitions. Second operand 3 states.
[2019-10-13 23:22:22,097 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-10-13 23:22:22,097 INFO  L93              Difference]: Finished difference Result 8340 states and 10960 transitions.
[2019-10-13 23:22:22,097 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2019-10-13 23:22:22,097 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 59
[2019-10-13 23:22:22,098 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-10-13 23:22:22,112 INFO  L225             Difference]: With dead ends: 8340
[2019-10-13 23:22:22,112 INFO  L226             Difference]: Without dead ends: 6034
[2019-10-13 23:22:22,120 INFO  L600         BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2019-10-13 23:22:22,127 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 6034 states.
[2019-10-13 23:22:22,739 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 6034 to 5474.
[2019-10-13 23:22:22,739 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 5474 states.
[2019-10-13 23:22:22,746 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5474 states to 5474 states and 7008 transitions.
[2019-10-13 23:22:22,746 INFO  L78                 Accepts]: Start accepts. Automaton has 5474 states and 7008 transitions. Word has length 59
[2019-10-13 23:22:22,747 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-10-13 23:22:22,747 INFO  L462      AbstractCegarLoop]: Abstraction has 5474 states and 7008 transitions.
[2019-10-13 23:22:22,747 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2019-10-13 23:22:22,747 INFO  L276                IsEmpty]: Start isEmpty. Operand 5474 states and 7008 transitions.
[2019-10-13 23:22:22,751 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 61
[2019-10-13 23:22:22,752 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-13 23:22:22,752 INFO  L380         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-10-13 23:22:22,752 INFO  L410      AbstractCegarLoop]: === Iteration 10 === [mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-13 23:22:22,752 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-13 23:22:22,753 INFO  L82        PathProgramCache]: Analyzing trace with hash 23632550, now seen corresponding path program 1 times
[2019-10-13 23:22:22,753 INFO  L157   tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2019-10-13 23:22:22,753 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083594289]
[2019-10-13 23:22:22,753 INFO  L116   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 23:22:22,753 INFO  L116   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 23:22:22,753 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-13 23:22:22,783 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 23:22:22,832 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-10-13 23:22:22,832 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083594289]
[2019-10-13 23:22:22,832 INFO  L223   tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-10-13 23:22:22,832 INFO  L236   tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2019-10-13 23:22:22,833 INFO  L342   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775021295]
[2019-10-13 23:22:22,833 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 3 states
[2019-10-13 23:22:22,834 INFO  L137   tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2019-10-13 23:22:22,834 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2019-10-13 23:22:22,834 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2019-10-13 23:22:22,834 INFO  L87              Difference]: Start difference. First operand 5474 states and 7008 transitions. Second operand 3 states.
[2019-10-13 23:22:23,435 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-10-13 23:22:23,435 INFO  L93              Difference]: Finished difference Result 8947 states and 11629 transitions.
[2019-10-13 23:22:23,435 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2019-10-13 23:22:23,435 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 60
[2019-10-13 23:22:23,435 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-10-13 23:22:23,443 INFO  L225             Difference]: With dead ends: 8947
[2019-10-13 23:22:23,443 INFO  L226             Difference]: Without dead ends: 4932
[2019-10-13 23:22:23,453 INFO  L600         BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2019-10-13 23:22:23,461 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 4932 states.
[2019-10-13 23:22:23,932 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 4932 to 4091.
[2019-10-13 23:22:23,932 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 4091 states.
[2019-10-13 23:22:23,937 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 4091 states to 4091 states and 5201 transitions.
[2019-10-13 23:22:23,937 INFO  L78                 Accepts]: Start accepts. Automaton has 4091 states and 5201 transitions. Word has length 60
[2019-10-13 23:22:23,937 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-10-13 23:22:23,937 INFO  L462      AbstractCegarLoop]: Abstraction has 4091 states and 5201 transitions.
[2019-10-13 23:22:23,937 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2019-10-13 23:22:23,937 INFO  L276                IsEmpty]: Start isEmpty. Operand 4091 states and 5201 transitions.
[2019-10-13 23:22:23,940 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 61
[2019-10-13 23:22:23,940 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-13 23:22:23,940 INFO  L380         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-10-13 23:22:23,941 INFO  L410      AbstractCegarLoop]: === Iteration 11 === [mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-13 23:22:23,941 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-13 23:22:23,941 INFO  L82        PathProgramCache]: Analyzing trace with hash -1752281124, now seen corresponding path program 1 times
[2019-10-13 23:22:23,941 INFO  L157   tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2019-10-13 23:22:23,942 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252510901]
[2019-10-13 23:22:23,942 INFO  L116   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 23:22:23,942 INFO  L116   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 23:22:23,942 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-13 23:22:23,991 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 23:22:24,364 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-10-13 23:22:24,364 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252510901]
[2019-10-13 23:22:24,364 INFO  L223   tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-10-13 23:22:24,364 INFO  L236   tionRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11
[2019-10-13 23:22:24,364 INFO  L342   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460375976]
[2019-10-13 23:22:24,365 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 11 states
[2019-10-13 23:22:24,365 INFO  L137   tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2019-10-13 23:22:24,365 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants.
[2019-10-13 23:22:24,365 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110
[2019-10-13 23:22:24,365 INFO  L87              Difference]: Start difference. First operand 4091 states and 5201 transitions. Second operand 11 states.
[2019-10-13 23:22:25,003 WARN  L191               SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 42
[2019-10-13 23:22:25,238 WARN  L191               SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 42