/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 true --traceabstraction.additional.smt.options enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=NARROWEST -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 0.1.25-5644d1e-m
[2020-08-18 22:05:22,262 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2020-08-18 22:05:22,265 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2020-08-18 22:05:22,304 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2020-08-18 22:05:22,304 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2020-08-18 22:05:22,313 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2020-08-18 22:05:22,316 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2020-08-18 22:05:22,320 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
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[2020-08-18 22:05:22,322 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
[2020-08-18 22:05:22,324 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
[2020-08-18 22:05:22,326 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2020-08-18 22:05:22,326 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2020-08-18 22:05:22,329 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2020-08-18 22:05:22,330 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2020-08-18 22:05:22,332 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2020-08-18 22:05:22,334 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2020-08-18 22:05:22,336 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2020-08-18 22:05:22,337 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2020-08-18 22:05:22,344 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2020-08-18 22:05:22,346 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2020-08-18 22:05:22,347 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2020-08-18 22:05:22,349 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2020-08-18 22:05:22,350 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2020-08-18 22:05:22,362 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2020-08-18 22:05:22,362 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2020-08-18 22:05:22,362 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2020-08-18 22:05:22,363 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2020-08-18 22:05:22,364 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2020-08-18 22:05:22,366 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2020-08-18 22:05:22,367 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2020-08-18 22:05:22,367 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2020-08-18 22:05:22,368 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2020-08-18 22:05:22,369 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2020-08-18 22:05:22,369 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2020-08-18 22:05:22,370 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
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[2020-08-18 22:05:22,371 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
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[2020-08-18 22:05:22,373 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2020-08-18 22:05:22,374 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
[2020-08-18 22:05:22,415 INFO  L113        SettingsManager]: Loading preferences was successful
[2020-08-18 22:05:22,415 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2020-08-18 22:05:22,417 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2020-08-18 22:05:22,418 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2020-08-18 22:05:22,418 INFO  L138        SettingsManager]:  * Use SBE=true
[2020-08-18 22:05:22,418 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2020-08-18 22:05:22,418 INFO  L138        SettingsManager]:  * sizeof long=4
[2020-08-18 22:05:22,419 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2020-08-18 22:05:22,419 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2020-08-18 22:05:22,419 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2020-08-18 22:05:22,420 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2020-08-18 22:05:22,420 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2020-08-18 22:05:22,420 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2020-08-18 22:05:22,421 INFO  L138        SettingsManager]:  * sizeof long double=12
[2020-08-18 22:05:22,421 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2020-08-18 22:05:22,421 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2020-08-18 22:05:22,421 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2020-08-18 22:05:22,422 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2020-08-18 22:05:22,422 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2020-08-18 22:05:22,422 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2020-08-18 22:05:22,422 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2020-08-18 22:05:22,422 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-08-18 22:05:22,423 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2020-08-18 22:05:22,423 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2020-08-18 22:05:22,423 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2020-08-18 22:05:22,423 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2020-08-18 22:05:22,423 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-08-18 22:05:22,424 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2020-08-18 22:05:22,424 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2020-08-18 22:05:22,424 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 -> true
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=NARROWEST;
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=NARROWEST;
[2020-08-18 22:05:22,729 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2020-08-18 22:05:22,746 INFO  L258   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2020-08-18 22:05:22,751 INFO  L214   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2020-08-18 22:05:22,753 INFO  L271        PluginConnector]: Initializing CDTParser...
[2020-08-18 22:05:22,754 INFO  L275        PluginConnector]: CDTParser initialized
[2020-08-18 22:05:22,755 INFO  L429   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c
[2020-08-18 22:05:22,816 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/788ee3119/c852f2a4c4794b5fbbb774a01f128995/FLAG395a7c893
[2020-08-18 22:05:23,442 INFO  L306              CDTParser]: Found 1 translation units.
[2020-08-18 22:05:23,443 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c
[2020-08-18 22:05:23,465 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/788ee3119/c852f2a4c4794b5fbbb774a01f128995/FLAG395a7c893
[2020-08-18 22:05:23,602 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/788ee3119/c852f2a4c4794b5fbbb774a01f128995
[2020-08-18 22:05:23,613 INFO  L296   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2020-08-18 22:05:23,615 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2020-08-18 22:05:23,617 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2020-08-18 22:05:23,617 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2020-08-18 22:05:23,620 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2020-08-18 22:05:23,621 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 10:05:23" (1/1) ...
[2020-08-18 22:05:23,625 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3afd2ce4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:05:23, skipping insertion in model container
[2020-08-18 22:05:23,626 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 10:05:23" (1/1) ...
[2020-08-18 22:05:23,636 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2020-08-18 22:05:23,739 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2020-08-18 22:05:24,812 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-08-18 22:05:24,832 INFO  L203         MainTranslator]: Completed pre-run
[2020-08-18 22:05:25,410 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-08-18 22:05:25,436 INFO  L208         MainTranslator]: Completed translation
[2020-08-18 22:05:25,437 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:05:25 WrapperNode
[2020-08-18 22:05:25,437 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2020-08-18 22:05:25,438 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2020-08-18 22:05:25,438 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2020-08-18 22:05:25,438 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2020-08-18 22:05:25,448 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:05:25" (1/1) ...
[2020-08-18 22:05:25,449 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:05:25" (1/1) ...
[2020-08-18 22:05:25,477 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:05:25" (1/1) ...
[2020-08-18 22:05:25,477 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:05:25" (1/1) ...
[2020-08-18 22:05:25,532 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:05:25" (1/1) ...
[2020-08-18 22:05:25,576 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:05:25" (1/1) ...
[2020-08-18 22:05:25,593 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:05:25" (1/1) ...
[2020-08-18 22:05:25,618 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2020-08-18 22:05:25,619 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2020-08-18 22:05:25,619 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2020-08-18 22:05:25,619 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2020-08-18 22:05:25,620 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:05:25" (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
[2020-08-18 22:05:25,698 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2020-08-18 22:05:25,698 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2020-08-18 22:05:25,698 INFO  L138     BoogieDeclarations]: Found implementation of procedure assume_abort_if_not
[2020-08-18 22:05:25,699 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2020-08-18 22:05:25,700 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2020-08-18 22:05:25,700 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char
[2020-08-18 22:05:25,700 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar
[2020-08-18 22:05:25,700 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool
[2020-08-18 22:05:25,701 INFO  L130     BoogieDeclarations]: Found specification of procedure assert
[2020-08-18 22:05:25,701 INFO  L130     BoogieDeclarations]: Found specification of procedure abort
[2020-08-18 22:05:25,702 INFO  L130     BoogieDeclarations]: Found specification of procedure assume_abort_if_not
[2020-08-18 22:05:25,702 INFO  L130     BoogieDeclarations]: Found specification of procedure read
[2020-08-18 22:05:25,702 INFO  L130     BoogieDeclarations]: Found specification of procedure write
[2020-08-18 22:05:25,703 INFO  L130     BoogieDeclarations]: Found specification of procedure node1
[2020-08-18 22:05:25,703 INFO  L130     BoogieDeclarations]: Found specification of procedure node2
[2020-08-18 22:05:25,704 INFO  L130     BoogieDeclarations]: Found specification of procedure node3
[2020-08-18 22:05:25,704 INFO  L130     BoogieDeclarations]: Found specification of procedure node4
[2020-08-18 22:05:25,704 INFO  L130     BoogieDeclarations]: Found specification of procedure init
[2020-08-18 22:05:25,704 INFO  L130     BoogieDeclarations]: Found specification of procedure check
[2020-08-18 22:05:25,705 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2020-08-18 22:05:25,705 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2020-08-18 22:05:25,705 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2020-08-18 22:05:28,421 INFO  L290             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2020-08-18 22:05:28,422 INFO  L295             CfgBuilder]: Removed 0 assume(true) statements.
[2020-08-18 22:05:28,443 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 10:05:28 BoogieIcfgContainer
[2020-08-18 22:05:28,443 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2020-08-18 22:05:28,444 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2020-08-18 22:05:28,444 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2020-08-18 22:05:28,449 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2020-08-18 22:05:28,449 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 10:05:23" (1/3) ...
[2020-08-18 22:05:28,450 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4bba8090 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 10:05:28, skipping insertion in model container
[2020-08-18 22:05:28,451 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:05:25" (2/3) ...
[2020-08-18 22:05:28,451 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4bba8090 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 10:05:28, skipping insertion in model container
[2020-08-18 22:05:28,452 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 10:05:28" (3/3) ...
[2020-08-18 22:05:28,454 INFO  L109   eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c
[2020-08-18 22:05:28,466 INFO  L157   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION
[2020-08-18 22:05:28,480 INFO  L169   ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2020-08-18 22:05:28,494 INFO  L251      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2020-08-18 22:05:28,525 INFO  L375      AbstractCegarLoop]: Interprodecural is true
[2020-08-18 22:05:28,526 INFO  L376      AbstractCegarLoop]: Hoare is true
[2020-08-18 22:05:28,526 INFO  L377      AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation
[2020-08-18 22:05:28,526 INFO  L378      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2020-08-18 22:05:28,526 INFO  L379      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2020-08-18 22:05:28,526 INFO  L380      AbstractCegarLoop]: Difference is false
[2020-08-18 22:05:28,527 INFO  L381      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2020-08-18 22:05:28,527 INFO  L385      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2020-08-18 22:05:28,560 INFO  L276                IsEmpty]: Start isEmpty. Operand 808 states.
[2020-08-18 22:05:28,590 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 331
[2020-08-18 22:05:28,590 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-18 22:05:28,592 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]
[2020-08-18 22:05:28,592 INFO  L427      AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-18 22:05:28,599 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-18 22:05:28,600 INFO  L82        PathProgramCache]: Analyzing trace with hash 1078138388, now seen corresponding path program 1 times
[2020-08-18 22:05:28,607 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-18 22:05:28,607 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [111377931]
[2020-08-18 22:05:28,607 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-18 22:05:29,455 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 22:05:30,556 WARN  L193               SmtUtils]: Spent 582.00 ms on a formula simplification that was a NOOP. DAG size: 277
[2020-08-18 22:05:30,559 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-18 22:05:30,566 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 22:05:30,744 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-08-18 22:05:30,745 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [111377931]
[2020-08-18 22:05:30,746 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-18 22:05:30,747 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-08-18 22:05:30,748 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317054578]
[2020-08-18 22:05:30,754 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-08-18 22:05:30,754 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-18 22:05:30,766 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-08-18 22:05:30,767 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-08-18 22:05:30,769 INFO  L87              Difference]: Start difference. First operand 808 states. Second operand 4 states.
[2020-08-18 22:05:31,321 WARN  L193               SmtUtils]: Spent 478.00 ms on a formula simplification that was a NOOP. DAG size: 278
[2020-08-18 22:05:36,536 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-18 22:05:36,537 INFO  L93              Difference]: Finished difference Result 1527 states and 2683 transitions.
[2020-08-18 22:05:36,537 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2020-08-18 22:05:36,539 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 330
[2020-08-18 22:05:36,542 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-18 22:05:36,570 INFO  L225             Difference]: With dead ends: 1527
[2020-08-18 22:05:36,570 INFO  L226             Difference]: Without dead ends: 1311
[2020-08-18 22:05:36,576 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2020-08-18 22:05:36,594 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 1311 states.
[2020-08-18 22:05:36,745 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 1311 to 1309.
[2020-08-18 22:05:36,746 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 1309 states.
[2020-08-18 22:05:36,753 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 1309 states to 1309 states and 2040 transitions.
[2020-08-18 22:05:36,755 INFO  L78                 Accepts]: Start accepts. Automaton has 1309 states and 2040 transitions. Word has length 330
[2020-08-18 22:05:36,756 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-18 22:05:36,757 INFO  L479      AbstractCegarLoop]: Abstraction has 1309 states and 2040 transitions.
[2020-08-18 22:05:36,757 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2020-08-18 22:05:36,757 INFO  L276                IsEmpty]: Start isEmpty. Operand 1309 states and 2040 transitions.
[2020-08-18 22:05:36,771 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 331
[2020-08-18 22:05:36,771 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-18 22:05:36,772 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]
[2020-08-18 22:05:36,772 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2020-08-18 22:05:36,773 INFO  L427      AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-18 22:05:36,773 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-18 22:05:36,773 INFO  L82        PathProgramCache]: Analyzing trace with hash 1867298226, now seen corresponding path program 1 times
[2020-08-18 22:05:36,773 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-18 22:05:36,774 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [391599724]
[2020-08-18 22:05:36,774 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-18 22:05:36,948 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 22:05:37,774 WARN  L193               SmtUtils]: Spent 576.00 ms on a formula simplification that was a NOOP. DAG size: 277
[2020-08-18 22:05:37,777 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-18 22:05:37,786 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 22:05:38,176 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-08-18 22:05:38,176 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [391599724]
[2020-08-18 22:05:38,177 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-18 22:05:38,177 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-08-18 22:05:38,178 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628823338]
[2020-08-18 22:05:38,180 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-08-18 22:05:38,181 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-18 22:05:38,181 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-08-18 22:05:38,182 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-08-18 22:05:38,182 INFO  L87              Difference]: Start difference. First operand 1309 states and 2040 transitions. Second operand 4 states.
[2020-08-18 22:05:38,940 WARN  L193               SmtUtils]: Spent 693.00 ms on a formula simplification that was a NOOP. DAG size: 278
[2020-08-18 22:05:43,475 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-18 22:05:43,475 INFO  L93              Difference]: Finished difference Result 2683 states and 4213 transitions.
[2020-08-18 22:05:43,476 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2020-08-18 22:05:43,476 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 330
[2020-08-18 22:05:43,477 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-18 22:05:43,492 INFO  L225             Difference]: With dead ends: 2683
[2020-08-18 22:05:43,492 INFO  L226             Difference]: Without dead ends: 2301
[2020-08-18 22:05:43,501 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2020-08-18 22:05:43,505 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 2301 states.
[2020-08-18 22:05:43,591 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 2301 to 2299.
[2020-08-18 22:05:43,593 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 2299 states.
[2020-08-18 22:05:43,605 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 2299 states to 2299 states and 3576 transitions.
[2020-08-18 22:05:43,606 INFO  L78                 Accepts]: Start accepts. Automaton has 2299 states and 3576 transitions. Word has length 330
[2020-08-18 22:05:43,608 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-18 22:05:43,608 INFO  L479      AbstractCegarLoop]: Abstraction has 2299 states and 3576 transitions.
[2020-08-18 22:05:43,608 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2020-08-18 22:05:43,609 INFO  L276                IsEmpty]: Start isEmpty. Operand 2299 states and 3576 transitions.
[2020-08-18 22:05:43,617 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 331
[2020-08-18 22:05:43,617 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-18 22:05:43,618 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]
[2020-08-18 22:05:43,618 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2020-08-18 22:05:43,618 INFO  L427      AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-18 22:05:43,619 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-18 22:05:43,619 INFO  L82        PathProgramCache]: Analyzing trace with hash -1297523319, now seen corresponding path program 1 times
[2020-08-18 22:05:43,619 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-18 22:05:43,619 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [421903826]
[2020-08-18 22:05:43,620 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-18 22:05:43,787 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 22:05:44,564 WARN  L193               SmtUtils]: Spent 606.00 ms on a formula simplification that was a NOOP. DAG size: 277
[2020-08-18 22:05:44,566 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-18 22:05:44,572 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 22:05:44,775 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-08-18 22:05:44,775 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [421903826]
[2020-08-18 22:05:44,776 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-18 22:05:44,776 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-08-18 22:05:44,776 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459886163]
[2020-08-18 22:05:44,777 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-08-18 22:05:44,777 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-18 22:05:44,778 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-08-18 22:05:44,778 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-08-18 22:05:44,778 INFO  L87              Difference]: Start difference. First operand 2299 states and 3576 transitions. Second operand 4 states.
[2020-08-18 22:05:45,284 WARN  L193               SmtUtils]: Spent 462.00 ms on a formula simplification that was a NOOP. DAG size: 278
[2020-08-18 22:05:49,647 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-18 22:05:49,648 INFO  L93              Difference]: Finished difference Result 4867 states and 7634 transitions.
[2020-08-18 22:05:49,648 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2020-08-18 22:05:49,649 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 330
[2020-08-18 22:05:49,650 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-18 22:05:49,671 INFO  L225             Difference]: With dead ends: 4867
[2020-08-18 22:05:49,671 INFO  L226             Difference]: Without dead ends: 4201
[2020-08-18 22:05:49,674 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
[2020-08-18 22:05:49,680 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 4201 states.
[2020-08-18 22:05:49,855 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 4201 to 4199.
[2020-08-18 22:05:49,855 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 4199 states.
[2020-08-18 22:05:49,869 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 4199 states to 4199 states and 6516 transitions.
[2020-08-18 22:05:49,870 INFO  L78                 Accepts]: Start accepts. Automaton has 4199 states and 6516 transitions. Word has length 330
[2020-08-18 22:05:49,871 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-18 22:05:49,871 INFO  L479      AbstractCegarLoop]: Abstraction has 4199 states and 6516 transitions.
[2020-08-18 22:05:49,871 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2020-08-18 22:05:49,871 INFO  L276                IsEmpty]: Start isEmpty. Operand 4199 states and 6516 transitions.
[2020-08-18 22:05:49,882 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 331
[2020-08-18 22:05:49,882 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-18 22:05:49,883 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]
[2020-08-18 22:05:49,883 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2020-08-18 22:05:49,883 INFO  L427      AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-18 22:05:49,884 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-18 22:05:49,884 INFO  L82        PathProgramCache]: Analyzing trace with hash 1852614154, now seen corresponding path program 1 times
[2020-08-18 22:05:49,885 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-18 22:05:49,885 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1574823376]
[2020-08-18 22:05:49,885 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-18 22:05:50,257 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 22:05:50,983 WARN  L193               SmtUtils]: Spent 541.00 ms on a formula simplification that was a NOOP. DAG size: 277
[2020-08-18 22:05:50,984 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-18 22:05:50,990 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 22:05:51,151 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-08-18 22:05:51,151 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1574823376]
[2020-08-18 22:05:51,151 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-18 22:05:51,152 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2020-08-18 22:05:51,152 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622731794]
[2020-08-18 22:05:51,153 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 5 states
[2020-08-18 22:05:51,153 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-18 22:05:51,153 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2020-08-18 22:05:51,154 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2020-08-18 22:05:51,154 INFO  L87              Difference]: Start difference. First operand 4199 states and 6516 transitions. Second operand 5 states.
[2020-08-18 22:05:58,646 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-18 22:05:58,646 INFO  L93              Difference]: Finished difference Result 12414 states and 19245 transitions.
[2020-08-18 22:05:58,652 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2020-08-18 22:05:58,652 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 330
[2020-08-18 22:05:58,653 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-18 22:05:58,690 INFO  L225             Difference]: With dead ends: 12414
[2020-08-18 22:05:58,690 INFO  L226             Difference]: Without dead ends: 8230
[2020-08-18 22:05:58,701 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
[2020-08-18 22:05:58,711 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 8230 states.
[2020-08-18 22:05:58,994 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 8230 to 8228.
[2020-08-18 22:05:58,995 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 8228 states.
[2020-08-18 22:05:59,021 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 8228 states to 8228 states and 12694 transitions.
[2020-08-18 22:05:59,022 INFO  L78                 Accepts]: Start accepts. Automaton has 8228 states and 12694 transitions. Word has length 330
[2020-08-18 22:05:59,022 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-18 22:05:59,022 INFO  L479      AbstractCegarLoop]: Abstraction has 8228 states and 12694 transitions.
[2020-08-18 22:05:59,022 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2020-08-18 22:05:59,023 INFO  L276                IsEmpty]: Start isEmpty. Operand 8228 states and 12694 transitions.
[2020-08-18 22:05:59,043 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 333
[2020-08-18 22:05:59,043 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-18 22:05:59,044 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]
[2020-08-18 22:05:59,044 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3
[2020-08-18 22:05:59,045 INFO  L427      AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-18 22:05:59,046 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-18 22:05:59,046 INFO  L82        PathProgramCache]: Analyzing trace with hash 569689837, now seen corresponding path program 1 times
[2020-08-18 22:05:59,046 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-18 22:05:59,047 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [666829096]
[2020-08-18 22:05:59,047 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-18 22:05:59,238 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 22:05:59,878 WARN  L193               SmtUtils]: Spent 481.00 ms on a formula simplification that was a NOOP. DAG size: 277
[2020-08-18 22:05:59,879 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-18 22:05:59,884 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 22:06:00,022 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-08-18 22:06:00,022 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [666829096]
[2020-08-18 22:06:00,023 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-18 22:06:00,023 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-08-18 22:06:00,023 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766041349]
[2020-08-18 22:06:00,024 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-08-18 22:06:00,024 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-18 22:06:00,024 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-08-18 22:06:00,025 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-08-18 22:06:00,025 INFO  L87              Difference]: Start difference. First operand 8228 states and 12694 transitions. Second operand 4 states.
[2020-08-18 22:06:08,351 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-18 22:06:08,352 INFO  L93              Difference]: Finished difference Result 24233 states and 37318 transitions.
[2020-08-18 22:06:08,352 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2020-08-18 22:06:08,353 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 332
[2020-08-18 22:06:08,353 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-18 22:06:08,411 INFO  L225             Difference]: With dead ends: 24233
[2020-08-18 22:06:08,412 INFO  L226             Difference]: Without dead ends: 16134
[2020-08-18 22:06:08,429 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
[2020-08-18 22:06:08,448 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 16134 states.
[2020-08-18 22:06:08,861 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 16134 to 16132.
[2020-08-18 22:06:08,861 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 16132 states.
[2020-08-18 22:06:08,889 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 16132 states to 16132 states and 24741 transitions.
[2020-08-18 22:06:08,890 INFO  L78                 Accepts]: Start accepts. Automaton has 16132 states and 24741 transitions. Word has length 332
[2020-08-18 22:06:08,890 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-18 22:06:08,890 INFO  L479      AbstractCegarLoop]: Abstraction has 16132 states and 24741 transitions.
[2020-08-18 22:06:08,890 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2020-08-18 22:06:08,890 INFO  L276                IsEmpty]: Start isEmpty. Operand 16132 states and 24741 transitions.
[2020-08-18 22:06:09,011 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 333
[2020-08-18 22:06:09,011 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-18 22:06:09,012 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]
[2020-08-18 22:06:09,012 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4
[2020-08-18 22:06:09,012 INFO  L427      AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-18 22:06:09,012 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-18 22:06:09,013 INFO  L82        PathProgramCache]: Analyzing trace with hash -310142286, now seen corresponding path program 1 times
[2020-08-18 22:06:09,013 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-18 22:06:09,013 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [795731582]
[2020-08-18 22:06:09,013 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-18 22:06:09,063 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 22:06:09,855 WARN  L193               SmtUtils]: Spent 707.00 ms on a formula simplification that was a NOOP. DAG size: 277
[2020-08-18 22:06:09,856 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-18 22:06:09,861 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 22:06:09,949 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-08-18 22:06:09,949 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [795731582]
[2020-08-18 22:06:09,950 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-18 22:06:09,950 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-08-18 22:06:09,950 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667503477]
[2020-08-18 22:06:09,951 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-08-18 22:06:09,951 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-18 22:06:09,951 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-08-18 22:06:09,951 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-08-18 22:06:09,952 INFO  L87              Difference]: Start difference. First operand 16132 states and 24741 transitions. Second operand 4 states.
[2020-08-18 22:06:18,783 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-18 22:06:18,784 INFO  L93              Difference]: Finished difference Result 48321 states and 74099 transitions.
[2020-08-18 22:06:18,784 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2020-08-18 22:06:18,785 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 332
[2020-08-18 22:06:18,785 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-18 22:06:18,856 INFO  L225             Difference]: With dead ends: 48321
[2020-08-18 22:06:18,857 INFO  L226             Difference]: Without dead ends: 32231
[2020-08-18 22:06:18,888 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-08-18 22:06:18,923 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 32231 states.
[2020-08-18 22:06:20,399 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 32231 to 16151.
[2020-08-18 22:06:20,400 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 16151 states.
[2020-08-18 22:06:20,416 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 16151 states to 16151 states and 24769 transitions.
[2020-08-18 22:06:20,417 INFO  L78                 Accepts]: Start accepts. Automaton has 16151 states and 24769 transitions. Word has length 332
[2020-08-18 22:06:20,417 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-18 22:06:20,417 INFO  L479      AbstractCegarLoop]: Abstraction has 16151 states and 24769 transitions.
[2020-08-18 22:06:20,417 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2020-08-18 22:06:20,417 INFO  L276                IsEmpty]: Start isEmpty. Operand 16151 states and 24769 transitions.
[2020-08-18 22:06:20,455 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 334
[2020-08-18 22:06:20,455 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-18 22:06:20,456 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]
[2020-08-18 22:06:20,456 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5
[2020-08-18 22:06:20,456 INFO  L427      AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-18 22:06:20,457 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-18 22:06:20,457 INFO  L82        PathProgramCache]: Analyzing trace with hash -1868318850, now seen corresponding path program 1 times
[2020-08-18 22:06:20,457 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-18 22:06:20,457 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1507686926]
[2020-08-18 22:06:20,458 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-18 22:06:20,492 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 22:06:21,168 WARN  L193               SmtUtils]: Spent 597.00 ms on a formula simplification that was a NOOP. DAG size: 277
[2020-08-18 22:06:21,169 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-18 22:06:21,174 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 22:06:21,269 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-08-18 22:06:21,271 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1507686926]
[2020-08-18 22:06:21,271 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-18 22:06:21,272 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-08-18 22:06:21,272 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939132777]
[2020-08-18 22:06:21,273 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-08-18 22:06:21,273 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-18 22:06:21,273 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-08-18 22:06:21,273 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-08-18 22:06:21,273 INFO  L87              Difference]: Start difference. First operand 16151 states and 24769 transitions. Second operand 4 states.