/usr/bin/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 --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration false -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c


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


This is Ultimate 0.1.25-177f698
[2020-08-21 13:29:21,948 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2020-08-21 13:29:21,951 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2020-08-21 13:29:21,978 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2020-08-21 13:29:21,979 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2020-08-21 13:29:21,987 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2020-08-21 13:29:21,988 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
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[2020-08-21 13:29:22,001 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2020-08-21 13:29:22,003 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2020-08-21 13:29:22,006 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2020-08-21 13:29:22,008 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2020-08-21 13:29:22,009 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2020-08-21 13:29:22,010 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2020-08-21 13:29:22,013 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2020-08-21 13:29:22,021 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2020-08-21 13:29:22,023 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2020-08-21 13:29:22,024 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2020-08-21 13:29:22,025 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2020-08-21 13:29:22,026 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2020-08-21 13:29:22,037 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2020-08-21 13:29:22,037 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2020-08-21 13:29:22,037 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2020-08-21 13:29:22,040 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2020-08-21 13:29:22,040 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2020-08-21 13:29:22,043 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2020-08-21 13:29:22,043 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
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[2020-08-21 13:29:22,045 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
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[2020-08-21 13:29:22,048 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2020-08-21 13:29:22,048 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
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[2020-08-21 13:29:22,049 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
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[2020-08-21 13:29:22,051 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2020-08-21 13:29:22,052 INFO  L101        SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf
[2020-08-21 13:29:22,094 INFO  L113        SettingsManager]: Loading preferences was successful
[2020-08-21 13:29:22,095 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2020-08-21 13:29:22,096 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2020-08-21 13:29:22,097 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2020-08-21 13:29:22,097 INFO  L138        SettingsManager]:  * Use SBE=true
[2020-08-21 13:29:22,097 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2020-08-21 13:29:22,097 INFO  L138        SettingsManager]:  * sizeof long=4
[2020-08-21 13:29:22,097 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2020-08-21 13:29:22,098 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2020-08-21 13:29:22,098 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2020-08-21 13:29:22,099 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2020-08-21 13:29:22,099 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2020-08-21 13:29:22,099 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2020-08-21 13:29:22,100 INFO  L138        SettingsManager]:  * sizeof long double=12
[2020-08-21 13:29:22,100 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2020-08-21 13:29:22,100 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2020-08-21 13:29:22,100 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2020-08-21 13:29:22,101 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2020-08-21 13:29:22,101 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2020-08-21 13:29:22,101 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2020-08-21 13:29:22,101 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2020-08-21 13:29:22,101 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-08-21 13:29:22,102 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2020-08-21 13:29:22,102 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2020-08-21 13:29:22,102 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2020-08-21 13:29:22,102 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2020-08-21 13:29:22,102 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-08-21 13:29:22,102 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2020-08-21 13:29:22,103 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2020-08-21 13:29:22,103 INFO  L138        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> false
[2020-08-21 13:29:22,416 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2020-08-21 13:29:22,426 INFO  L258   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2020-08-21 13:29:22,432 INFO  L214   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2020-08-21 13:29:22,434 INFO  L271        PluginConnector]: Initializing CDTParser...
[2020-08-21 13:29:22,434 INFO  L275        PluginConnector]: CDTParser initialized
[2020-08-21 13:29:22,435 INFO  L429   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c
[2020-08-21 13:29:22,496 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b5601ceb9/a30dc96fb4144d858a4679be5eaf26d1/FLAG33044d2fb
[2020-08-21 13:29:23,157 INFO  L306              CDTParser]: Found 1 translation units.
[2020-08-21 13:29:23,158 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c
[2020-08-21 13:29:23,174 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b5601ceb9/a30dc96fb4144d858a4679be5eaf26d1/FLAG33044d2fb
[2020-08-21 13:29:23,350 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b5601ceb9/a30dc96fb4144d858a4679be5eaf26d1
[2020-08-21 13:29:23,360 INFO  L296   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2020-08-21 13:29:23,362 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2020-08-21 13:29:23,363 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2020-08-21 13:29:23,363 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2020-08-21 13:29:23,367 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2020-08-21 13:29:23,368 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 01:29:23" (1/1) ...
[2020-08-21 13:29:23,370 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e64e3ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:29:23, skipping insertion in model container
[2020-08-21 13:29:23,371 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 01:29:23" (1/1) ...
[2020-08-21 13:29:23,379 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2020-08-21 13:29:23,500 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2020-08-21 13:29:24,603 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-08-21 13:29:24,624 INFO  L203         MainTranslator]: Completed pre-run
[2020-08-21 13:29:25,109 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-08-21 13:29:25,137 INFO  L208         MainTranslator]: Completed translation
[2020-08-21 13:29:25,138 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:29:25 WrapperNode
[2020-08-21 13:29:25,138 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2020-08-21 13:29:25,139 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2020-08-21 13:29:25,140 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2020-08-21 13:29:25,140 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2020-08-21 13:29:25,163 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:29:25" (1/1) ...
[2020-08-21 13:29:25,163 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:29:25" (1/1) ...
[2020-08-21 13:29:25,192 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:29:25" (1/1) ...
[2020-08-21 13:29:25,192 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:29:25" (1/1) ...
[2020-08-21 13:29:25,260 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:29:25" (1/1) ...
[2020-08-21 13:29:25,294 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:29:25" (1/1) ...
[2020-08-21 13:29:25,302 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:29:25" (1/1) ...
[2020-08-21 13:29:25,313 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2020-08-21 13:29:25,314 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2020-08-21 13:29:25,314 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2020-08-21 13:29:25,314 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2020-08-21 13:29:25,315 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:29:25" (1/1) ...
No working directory specified, using /storage/repos/ultimate-2/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
[2020-08-21 13:29:25,388 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2020-08-21 13:29:25,388 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2020-08-21 13:29:25,389 INFO  L138     BoogieDeclarations]: Found implementation of procedure assume_abort_if_not
[2020-08-21 13:29:25,389 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2020-08-21 13:29:25,389 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2020-08-21 13:29:25,389 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char
[2020-08-21 13:29:25,390 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar
[2020-08-21 13:29:25,390 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool
[2020-08-21 13:29:25,391 INFO  L130     BoogieDeclarations]: Found specification of procedure assert
[2020-08-21 13:29:25,391 INFO  L130     BoogieDeclarations]: Found specification of procedure abort
[2020-08-21 13:29:25,391 INFO  L130     BoogieDeclarations]: Found specification of procedure assume_abort_if_not
[2020-08-21 13:29:25,392 INFO  L130     BoogieDeclarations]: Found specification of procedure read
[2020-08-21 13:29:25,393 INFO  L130     BoogieDeclarations]: Found specification of procedure write
[2020-08-21 13:29:25,393 INFO  L130     BoogieDeclarations]: Found specification of procedure node1
[2020-08-21 13:29:25,393 INFO  L130     BoogieDeclarations]: Found specification of procedure node2
[2020-08-21 13:29:25,394 INFO  L130     BoogieDeclarations]: Found specification of procedure node3
[2020-08-21 13:29:25,394 INFO  L130     BoogieDeclarations]: Found specification of procedure node4
[2020-08-21 13:29:25,394 INFO  L130     BoogieDeclarations]: Found specification of procedure init
[2020-08-21 13:29:25,395 INFO  L130     BoogieDeclarations]: Found specification of procedure check
[2020-08-21 13:29:25,395 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2020-08-21 13:29:25,396 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2020-08-21 13:29:25,396 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2020-08-21 13:29:28,244 INFO  L290             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2020-08-21 13:29:28,244 INFO  L295             CfgBuilder]: Removed 0 assume(true) statements.
[2020-08-21 13:29:28,260 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 01:29:28 BoogieIcfgContainer
[2020-08-21 13:29:28,260 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2020-08-21 13:29:28,261 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2020-08-21 13:29:28,262 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2020-08-21 13:29:28,267 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2020-08-21 13:29:28,268 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 01:29:23" (1/3) ...
[2020-08-21 13:29:28,269 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28f910f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 01:29:28, skipping insertion in model container
[2020-08-21 13:29:28,269 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:29:25" (2/3) ...
[2020-08-21 13:29:28,270 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28f910f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 01:29:28, skipping insertion in model container
[2020-08-21 13:29:28,270 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 01:29:28" (3/3) ...
[2020-08-21 13:29:28,272 INFO  L109   eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c
[2020-08-21 13:29:28,283 INFO  L157   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION
[2020-08-21 13:29:28,298 INFO  L169   ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2020-08-21 13:29:28,313 INFO  L251      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2020-08-21 13:29:28,348 INFO  L375      AbstractCegarLoop]: Interprodecural is true
[2020-08-21 13:29:28,348 INFO  L376      AbstractCegarLoop]: Hoare is true
[2020-08-21 13:29:28,349 INFO  L377      AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation
[2020-08-21 13:29:28,349 INFO  L378      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2020-08-21 13:29:28,349 INFO  L379      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2020-08-21 13:29:28,349 INFO  L380      AbstractCegarLoop]: Difference is false
[2020-08-21 13:29:28,349 INFO  L381      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2020-08-21 13:29:28,349 INFO  L385      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2020-08-21 13:29:28,384 INFO  L276                IsEmpty]: Start isEmpty. Operand 808 states.
[2020-08-21 13:29:28,414 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 331
[2020-08-21 13:29:28,415 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-21 13:29:28,416 INFO  L422         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]
[2020-08-21 13:29:28,417 INFO  L427      AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-21 13:29:28,423 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-21 13:29:28,423 INFO  L82        PathProgramCache]: Analyzing trace with hash 1078138388, now seen corresponding path program 1 times
[2020-08-21 13:29:28,431 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-21 13:29:28,431 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [195248189]
[2020-08-21 13:29:28,432 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-21 13:29:29,155 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 13:29:30,350 WARN  L193               SmtUtils]: Spent 735.00 ms on a formula simplification that was a NOOP. DAG size: 277
[2020-08-21 13:29:30,353 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-21 13:29:30,367 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 13:29:30,569 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-08-21 13:29:30,570 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [195248189]
[2020-08-21 13:29:30,573 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-21 13:29:30,574 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-08-21 13:29:30,575 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519881718]
[2020-08-21 13:29:30,587 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-08-21 13:29:30,588 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-21 13:29:30,610 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-08-21 13:29:30,611 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-08-21 13:29:30,614 INFO  L87              Difference]: Start difference. First operand 808 states. Second operand 4 states.
[2020-08-21 13:29:31,547 WARN  L193               SmtUtils]: Spent 814.00 ms on a formula simplification that was a NOOP. DAG size: 278
[2020-08-21 13:29:36,699 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-21 13:29:36,700 INFO  L93              Difference]: Finished difference Result 1527 states and 2683 transitions.
[2020-08-21 13:29:36,701 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2020-08-21 13:29:36,702 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 330
[2020-08-21 13:29:36,704 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-21 13:29:36,729 INFO  L225             Difference]: With dead ends: 1527
[2020-08-21 13:29:36,729 INFO  L226             Difference]: Without dead ends: 1311
[2020-08-21 13:29:36,737 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2020-08-21 13:29:36,758 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 1311 states.
[2020-08-21 13:29:36,876 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 1311 to 1309.
[2020-08-21 13:29:36,877 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 1309 states.
[2020-08-21 13:29:36,884 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 1309 states to 1309 states and 2040 transitions.
[2020-08-21 13:29:36,886 INFO  L78                 Accepts]: Start accepts. Automaton has 1309 states and 2040 transitions. Word has length 330
[2020-08-21 13:29:36,888 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-21 13:29:36,888 INFO  L479      AbstractCegarLoop]: Abstraction has 1309 states and 2040 transitions.
[2020-08-21 13:29:36,888 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2020-08-21 13:29:36,888 INFO  L276                IsEmpty]: Start isEmpty. Operand 1309 states and 2040 transitions.
[2020-08-21 13:29:36,897 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 331
[2020-08-21 13:29:36,897 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-21 13:29:36,898 INFO  L422         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]
[2020-08-21 13:29:36,899 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2020-08-21 13:29:36,899 INFO  L427      AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-21 13:29:36,899 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-21 13:29:36,899 INFO  L82        PathProgramCache]: Analyzing trace with hash 1867298226, now seen corresponding path program 1 times
[2020-08-21 13:29:36,900 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-21 13:29:36,900 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [195805687]
[2020-08-21 13:29:36,900 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-21 13:29:37,089 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 13:29:37,920 WARN  L193               SmtUtils]: Spent 621.00 ms on a formula simplification that was a NOOP. DAG size: 277
[2020-08-21 13:29:37,922 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-21 13:29:37,932 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 13:29:38,196 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-08-21 13:29:38,197 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [195805687]
[2020-08-21 13:29:38,197 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-21 13:29:38,198 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-08-21 13:29:38,198 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883894399]
[2020-08-21 13:29:38,203 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-08-21 13:29:38,203 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-21 13:29:38,204 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-08-21 13:29:38,204 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-08-21 13:29:38,205 INFO  L87              Difference]: Start difference. First operand 1309 states and 2040 transitions. Second operand 4 states.
[2020-08-21 13:29:39,115 WARN  L193               SmtUtils]: Spent 845.00 ms on a formula simplification that was a NOOP. DAG size: 278
[2020-08-21 13:29:43,666 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-21 13:29:43,667 INFO  L93              Difference]: Finished difference Result 2683 states and 4213 transitions.
[2020-08-21 13:29:43,667 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2020-08-21 13:29:43,668 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 330
[2020-08-21 13:29:43,669 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-21 13:29:43,682 INFO  L225             Difference]: With dead ends: 2683
[2020-08-21 13:29:43,683 INFO  L226             Difference]: Without dead ends: 2301
[2020-08-21 13:29:43,692 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2020-08-21 13:29:43,696 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 2301 states.
[2020-08-21 13:29:43,773 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 2301 to 2299.
[2020-08-21 13:29:43,774 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 2299 states.
[2020-08-21 13:29:43,787 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 2299 states to 2299 states and 3576 transitions.
[2020-08-21 13:29:43,788 INFO  L78                 Accepts]: Start accepts. Automaton has 2299 states and 3576 transitions. Word has length 330
[2020-08-21 13:29:43,790 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-21 13:29:43,790 INFO  L479      AbstractCegarLoop]: Abstraction has 2299 states and 3576 transitions.
[2020-08-21 13:29:43,790 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2020-08-21 13:29:43,790 INFO  L276                IsEmpty]: Start isEmpty. Operand 2299 states and 3576 transitions.
[2020-08-21 13:29:43,799 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 331
[2020-08-21 13:29:43,799 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-21 13:29:43,800 INFO  L422         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]
[2020-08-21 13:29:43,801 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2020-08-21 13:29:43,804 INFO  L427      AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-21 13:29:43,805 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-21 13:29:43,805 INFO  L82        PathProgramCache]: Analyzing trace with hash -1297523319, now seen corresponding path program 1 times
[2020-08-21 13:29:43,805 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-21 13:29:43,806 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1334740488]
[2020-08-21 13:29:43,807 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-21 13:29:44,040 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 13:29:44,877 WARN  L193               SmtUtils]: Spent 552.00 ms on a formula simplification that was a NOOP. DAG size: 277
[2020-08-21 13:29:44,879 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-21 13:29:44,885 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 13:29:45,108 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-08-21 13:29:45,109 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1334740488]
[2020-08-21 13:29:45,109 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-21 13:29:45,109 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-08-21 13:29:45,110 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582126589]
[2020-08-21 13:29:45,111 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-08-21 13:29:45,111 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-21 13:29:45,111 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-08-21 13:29:45,112 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-08-21 13:29:45,112 INFO  L87              Difference]: Start difference. First operand 2299 states and 3576 transitions. Second operand 4 states.
[2020-08-21 13:29:45,601 WARN  L193               SmtUtils]: Spent 447.00 ms on a formula simplification that was a NOOP. DAG size: 278
[2020-08-21 13:29:49,932 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-21 13:29:49,933 INFO  L93              Difference]: Finished difference Result 4867 states and 7634 transitions.
[2020-08-21 13:29:49,934 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2020-08-21 13:29:49,934 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 330
[2020-08-21 13:29:49,935 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-21 13:29:49,954 INFO  L225             Difference]: With dead ends: 4867
[2020-08-21 13:29:49,955 INFO  L226             Difference]: Without dead ends: 4201
[2020-08-21 13:29:49,958 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2020-08-21 13:29:49,963 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 4201 states.
[2020-08-21 13:29:50,072 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 4201 to 4199.
[2020-08-21 13:29:50,073 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 4199 states.
[2020-08-21 13:29:50,087 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 4199 states to 4199 states and 6516 transitions.
[2020-08-21 13:29:50,088 INFO  L78                 Accepts]: Start accepts. Automaton has 4199 states and 6516 transitions. Word has length 330
[2020-08-21 13:29:50,088 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-21 13:29:50,089 INFO  L479      AbstractCegarLoop]: Abstraction has 4199 states and 6516 transitions.
[2020-08-21 13:29:50,089 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2020-08-21 13:29:50,089 INFO  L276                IsEmpty]: Start isEmpty. Operand 4199 states and 6516 transitions.
[2020-08-21 13:29:50,100 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 331
[2020-08-21 13:29:50,100 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-21 13:29:50,101 INFO  L422         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]
[2020-08-21 13:29:50,101 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2020-08-21 13:29:50,101 INFO  L427      AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-21 13:29:50,101 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-21 13:29:50,102 INFO  L82        PathProgramCache]: Analyzing trace with hash 1852614154, now seen corresponding path program 1 times
[2020-08-21 13:29:50,103 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-21 13:29:50,103 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [536829271]
[2020-08-21 13:29:50,103 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-21 13:29:50,481 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 13:29:51,125 WARN  L193               SmtUtils]: Spent 485.00 ms on a formula simplification that was a NOOP. DAG size: 277
[2020-08-21 13:29:51,126 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-21 13:29:51,132 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 13:29:51,322 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-08-21 13:29:51,322 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [536829271]
[2020-08-21 13:29:51,322 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-21 13:29:51,323 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2020-08-21 13:29:51,323 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619573301]
[2020-08-21 13:29:51,324 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 5 states
[2020-08-21 13:29:51,324 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-21 13:29:51,324 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2020-08-21 13:29:51,324 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2020-08-21 13:29:51,325 INFO  L87              Difference]: Start difference. First operand 4199 states and 6516 transitions. Second operand 5 states.
[2020-08-21 13:29:58,211 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-21 13:29:58,211 INFO  L93              Difference]: Finished difference Result 12414 states and 19245 transitions.
[2020-08-21 13:29:58,212 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2020-08-21 13:29:58,212 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 330
[2020-08-21 13:29:58,213 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-21 13:29:58,251 INFO  L225             Difference]: With dead ends: 12414
[2020-08-21 13:29:58,252 INFO  L226             Difference]: Without dead ends: 8230
[2020-08-21 13:29:58,262 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30
[2020-08-21 13:29:58,272 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 8230 states.
[2020-08-21 13:29:58,581 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 8230 to 8228.
[2020-08-21 13:29:58,582 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 8228 states.
[2020-08-21 13:29:58,608 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 8228 states to 8228 states and 12694 transitions.
[2020-08-21 13:29:58,608 INFO  L78                 Accepts]: Start accepts. Automaton has 8228 states and 12694 transitions. Word has length 330
[2020-08-21 13:29:58,608 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-21 13:29:58,608 INFO  L479      AbstractCegarLoop]: Abstraction has 8228 states and 12694 transitions.
[2020-08-21 13:29:58,609 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2020-08-21 13:29:58,609 INFO  L276                IsEmpty]: Start isEmpty. Operand 8228 states and 12694 transitions.
[2020-08-21 13:29:58,635 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 333
[2020-08-21 13:29:58,636 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-21 13:29:58,636 INFO  L422         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]
[2020-08-21 13:29:58,637 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3
[2020-08-21 13:29:58,637 INFO  L427      AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-21 13:29:58,638 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-21 13:29:58,638 INFO  L82        PathProgramCache]: Analyzing trace with hash 569689837, now seen corresponding path program 1 times
[2020-08-21 13:29:58,639 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-21 13:29:58,639 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1773265694]
[2020-08-21 13:29:58,639 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-21 13:29:58,787 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 13:29:59,456 WARN  L193               SmtUtils]: Spent 528.00 ms on a formula simplification that was a NOOP. DAG size: 277
[2020-08-21 13:29:59,458 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-21 13:29:59,465 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 13:29:59,596 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-08-21 13:29:59,597 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1773265694]
[2020-08-21 13:29:59,597 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-21 13:29:59,597 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-08-21 13:29:59,598 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481710102]
[2020-08-21 13:29:59,598 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-08-21 13:29:59,599 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-21 13:29:59,599 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-08-21 13:29:59,599 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-08-21 13:29:59,599 INFO  L87              Difference]: Start difference. First operand 8228 states and 12694 transitions. Second operand 4 states.
[2020-08-21 13:30:07,839 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-21 13:30:07,840 INFO  L93              Difference]: Finished difference Result 24233 states and 37318 transitions.
[2020-08-21 13:30:07,840 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2020-08-21 13:30:07,840 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 332
[2020-08-21 13:30:07,841 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-21 13:30:07,896 INFO  L225             Difference]: With dead ends: 24233
[2020-08-21 13:30:07,896 INFO  L226             Difference]: Without dead ends: 16134
[2020-08-21 13:30:07,915 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-08-21 13:30:07,934 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 16134 states.
[2020-08-21 13:30:08,489 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 16134 to 16132.
[2020-08-21 13:30:08,490 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 16132 states.
[2020-08-21 13:30:08,507 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 16132 states to 16132 states and 24741 transitions.
[2020-08-21 13:30:08,508 INFO  L78                 Accepts]: Start accepts. Automaton has 16132 states and 24741 transitions. Word has length 332
[2020-08-21 13:30:08,508 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-21 13:30:08,508 INFO  L479      AbstractCegarLoop]: Abstraction has 16132 states and 24741 transitions.
[2020-08-21 13:30:08,509 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2020-08-21 13:30:08,509 INFO  L276                IsEmpty]: Start isEmpty. Operand 16132 states and 24741 transitions.
[2020-08-21 13:30:08,540 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 333
[2020-08-21 13:30:08,540 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-21 13:30:08,541 INFO  L422         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]
[2020-08-21 13:30:08,541 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4
[2020-08-21 13:30:08,541 INFO  L427      AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-21 13:30:08,541 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-21 13:30:08,541 INFO  L82        PathProgramCache]: Analyzing trace with hash -310142286, now seen corresponding path program 1 times
[2020-08-21 13:30:08,542 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-21 13:30:08,542 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1788039181]
[2020-08-21 13:30:08,542 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-21 13:30:08,581 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 13:30:09,100 WARN  L193               SmtUtils]: Spent 442.00 ms on a formula simplification that was a NOOP. DAG size: 277
[2020-08-21 13:30:09,102 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-21 13:30:09,106 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 13:30:09,177 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-08-21 13:30:09,178 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1788039181]
[2020-08-21 13:30:09,178 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-21 13:30:09,178 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-08-21 13:30:09,178 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077135541]
[2020-08-21 13:30:09,179 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-08-21 13:30:09,179 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-21 13:30:09,179 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-08-21 13:30:09,180 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-08-21 13:30:09,180 INFO  L87              Difference]: Start difference. First operand 16132 states and 24741 transitions. Second operand 4 states.
[2020-08-21 13:30:18,443 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-21 13:30:18,444 INFO  L93              Difference]: Finished difference Result 48321 states and 74099 transitions.
[2020-08-21 13:30:18,444 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2020-08-21 13:30:18,444 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 332
[2020-08-21 13:30:18,445 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-21 13:30:18,509 INFO  L225             Difference]: With dead ends: 48321
[2020-08-21 13:30:18,510 INFO  L226             Difference]: Without dead ends: 32231
[2020-08-21 13:30:18,540 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-08-21 13:30:18,575 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 32231 states.
[2020-08-21 13:30:19,247 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 32231 to 16151.
[2020-08-21 13:30:19,247 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 16151 states.
[2020-08-21 13:30:19,274 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 16151 states to 16151 states and 24769 transitions.
[2020-08-21 13:30:19,275 INFO  L78                 Accepts]: Start accepts. Automaton has 16151 states and 24769 transitions. Word has length 332
[2020-08-21 13:30:19,275 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-21 13:30:19,275 INFO  L479      AbstractCegarLoop]: Abstraction has 16151 states and 24769 transitions.
[2020-08-21 13:30:19,276 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2020-08-21 13:30:19,276 INFO  L276                IsEmpty]: Start isEmpty. Operand 16151 states and 24769 transitions.
[2020-08-21 13:30:19,303 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 334
[2020-08-21 13:30:19,304 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-21 13:30:19,304 INFO  L422         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]
[2020-08-21 13:30:19,304 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5
[2020-08-21 13:30:19,305 INFO  L427      AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-21 13:30:19,305 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-21 13:30:19,305 INFO  L82        PathProgramCache]: Analyzing trace with hash -1868318850, now seen corresponding path program 1 times
[2020-08-21 13:30:19,306 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-21 13:30:19,307 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [545477828]
[2020-08-21 13:30:19,307 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-21 13:30:19,349 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 13:30:19,967 WARN  L193               SmtUtils]: Spent 540.00 ms on a formula simplification that was a NOOP. DAG size: 277
[2020-08-21 13:30:19,968 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-21 13:30:19,974 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 13:30:20,072 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-08-21 13:30:20,075 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [545477828]
[2020-08-21 13:30:20,075 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-21 13:30:20,076 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-08-21 13:30:20,076 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240341643]
[2020-08-21 13:30:20,077 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-08-21 13:30:20,077 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-21 13:30:20,077 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-08-21 13:30:20,077 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-08-21 13:30:20,078 INFO  L87              Difference]: Start difference. First operand 16151 states and 24769 transitions. Second operand 4 states.