/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 --rcfgbuilder.size.of.a.code.block SingleStatement --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.4.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c


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


This is Ultimate 0.1.25-c90d42b
[2020-09-24 15:11:20,653 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2020-09-24 15:11:20,658 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2020-09-24 15:11:20,705 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2020-09-24 15:11:20,705 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2020-09-24 15:11:20,717 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2020-09-24 15:11:20,719 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
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[2020-09-24 15:11:20,727 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2020-09-24 15:11:20,730 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
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[2020-09-24 15:11:20,734 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2020-09-24 15:11:20,738 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2020-09-24 15:11:20,741 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2020-09-24 15:11:20,744 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2020-09-24 15:11:20,746 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2020-09-24 15:11:20,747 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2020-09-24 15:11:20,750 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2020-09-24 15:11:20,760 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2020-09-24 15:11:20,763 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2020-09-24 15:11:20,764 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2020-09-24 15:11:20,765 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2020-09-24 15:11:20,766 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2020-09-24 15:11:20,769 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2020-09-24 15:11:20,770 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2020-09-24 15:11:20,770 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2020-09-24 15:11:20,773 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2020-09-24 15:11:20,774 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2020-09-24 15:11:20,776 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2020-09-24 15:11:20,776 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2020-09-24 15:11:20,778 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2020-09-24 15:11:20,779 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2020-09-24 15:11:20,780 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2020-09-24 15:11:20,781 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2020-09-24 15:11:20,781 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
[2020-09-24 15:11:20,782 INFO  L184        SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
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[2020-09-24 15:11:20,782 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
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[2020-09-24 15:11:20,785 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2020-09-24 15:11:20,786 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
[2020-09-24 15:11:20,833 INFO  L113        SettingsManager]: Loading preferences was successful
[2020-09-24 15:11:20,834 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2020-09-24 15:11:20,836 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2020-09-24 15:11:20,836 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2020-09-24 15:11:20,837 INFO  L138        SettingsManager]:  * Use SBE=true
[2020-09-24 15:11:20,837 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2020-09-24 15:11:20,837 INFO  L138        SettingsManager]:  * sizeof long=4
[2020-09-24 15:11:20,838 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2020-09-24 15:11:20,838 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2020-09-24 15:11:20,838 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2020-09-24 15:11:20,839 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2020-09-24 15:11:20,839 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2020-09-24 15:11:20,840 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2020-09-24 15:11:20,840 INFO  L138        SettingsManager]:  * sizeof long double=12
[2020-09-24 15:11:20,840 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2020-09-24 15:11:20,840 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2020-09-24 15:11:20,841 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2020-09-24 15:11:20,841 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2020-09-24 15:11:20,841 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2020-09-24 15:11:20,841 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2020-09-24 15:11:20,842 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2020-09-24 15:11:20,842 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-09-24 15:11:20,842 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2020-09-24 15:11:20,842 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2020-09-24 15:11:20,842 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2020-09-24 15:11:20,843 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2020-09-24 15:11:20,843 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-09-24 15:11:20,843 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2020-09-24 15:11:20,843 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2020-09-24 15:11:20,843 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.rcfgbuilder: Size of a code block -> SingleStatement
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> false
[2020-09-24 15:11:21,314 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2020-09-24 15:11:21,336 INFO  L258   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2020-09-24 15:11:21,340 INFO  L214   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2020-09-24 15:11:21,342 INFO  L271        PluginConnector]: Initializing CDTParser...
[2020-09-24 15:11:21,342 INFO  L275        PluginConnector]: CDTParser initialized
[2020-09-24 15:11:21,344 INFO  L429   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c
[2020-09-24 15:11:21,436 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8816601f9/e9481f47afc6436f9bbad015266fdda8/FLAG20c818ea0
[2020-09-24 15:11:22,195 INFO  L306              CDTParser]: Found 1 translation units.
[2020-09-24 15:11:22,196 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c
[2020-09-24 15:11:22,214 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8816601f9/e9481f47afc6436f9bbad015266fdda8/FLAG20c818ea0
[2020-09-24 15:11:22,346 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8816601f9/e9481f47afc6436f9bbad015266fdda8
[2020-09-24 15:11:22,359 INFO  L296   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2020-09-24 15:11:22,365 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2020-09-24 15:11:22,366 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2020-09-24 15:11:22,367 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2020-09-24 15:11:22,371 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2020-09-24 15:11:22,372 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 03:11:22" (1/1) ...
[2020-09-24 15:11:22,377 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c49d532 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:11:22, skipping insertion in model container
[2020-09-24 15:11:22,377 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 03:11:22" (1/1) ...
[2020-09-24 15:11:22,386 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2020-09-24 15:11:22,515 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2020-09-24 15:11:23,688 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-09-24 15:11:23,703 INFO  L203         MainTranslator]: Completed pre-run
[2020-09-24 15:11:24,185 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-09-24 15:11:24,232 INFO  L208         MainTranslator]: Completed translation
[2020-09-24 15:11:24,234 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:11:24 WrapperNode
[2020-09-24 15:11:24,235 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2020-09-24 15:11:24,236 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2020-09-24 15:11:24,236 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2020-09-24 15:11:24,236 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2020-09-24 15:11:24,262 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:11:24" (1/1) ...
[2020-09-24 15:11:24,265 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:11:24" (1/1) ...
[2020-09-24 15:11:24,323 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:11:24" (1/1) ...
[2020-09-24 15:11:24,324 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:11:24" (1/1) ...
[2020-09-24 15:11:24,399 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:11:24" (1/1) ...
[2020-09-24 15:11:24,439 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:11:24" (1/1) ...
[2020-09-24 15:11:24,447 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:11:24" (1/1) ...
[2020-09-24 15:11:24,461 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2020-09-24 15:11:24,462 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2020-09-24 15:11:24,462 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2020-09-24 15:11:24,462 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2020-09-24 15:11:24,464 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:11:24" (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
[2020-09-24 15:11:24,586 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2020-09-24 15:11:24,586 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2020-09-24 15:11:24,586 INFO  L138     BoogieDeclarations]: Found implementation of procedure assume_abort_if_not
[2020-09-24 15:11:24,587 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2020-09-24 15:11:24,587 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2020-09-24 15:11:24,588 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char
[2020-09-24 15:11:24,588 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar
[2020-09-24 15:11:24,588 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool
[2020-09-24 15:11:24,588 INFO  L130     BoogieDeclarations]: Found specification of procedure assert
[2020-09-24 15:11:24,589 INFO  L130     BoogieDeclarations]: Found specification of procedure abort
[2020-09-24 15:11:24,589 INFO  L130     BoogieDeclarations]: Found specification of procedure assume_abort_if_not
[2020-09-24 15:11:24,590 INFO  L130     BoogieDeclarations]: Found specification of procedure read
[2020-09-24 15:11:24,590 INFO  L130     BoogieDeclarations]: Found specification of procedure write
[2020-09-24 15:11:24,590 INFO  L130     BoogieDeclarations]: Found specification of procedure node1
[2020-09-24 15:11:24,590 INFO  L130     BoogieDeclarations]: Found specification of procedure node2
[2020-09-24 15:11:24,591 INFO  L130     BoogieDeclarations]: Found specification of procedure node3
[2020-09-24 15:11:24,591 INFO  L130     BoogieDeclarations]: Found specification of procedure node4
[2020-09-24 15:11:24,591 INFO  L130     BoogieDeclarations]: Found specification of procedure init
[2020-09-24 15:11:24,592 INFO  L130     BoogieDeclarations]: Found specification of procedure check
[2020-09-24 15:11:24,592 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2020-09-24 15:11:24,593 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2020-09-24 15:11:24,593 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2020-09-24 15:11:27,879 INFO  L290             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2020-09-24 15:11:27,880 INFO  L295             CfgBuilder]: Removed 0 assume(true) statements.
[2020-09-24 15:11:27,899 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 03:11:27 BoogieIcfgContainer
[2020-09-24 15:11:27,899 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2020-09-24 15:11:27,901 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2020-09-24 15:11:27,902 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2020-09-24 15:11:27,906 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2020-09-24 15:11:27,906 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 03:11:22" (1/3) ...
[2020-09-24 15:11:27,908 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61309de1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 03:11:27, skipping insertion in model container
[2020-09-24 15:11:27,908 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:11:24" (2/3) ...
[2020-09-24 15:11:27,909 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61309de1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 03:11:27, skipping insertion in model container
[2020-09-24 15:11:27,910 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 03:11:27" (3/3) ...
[2020-09-24 15:11:27,914 INFO  L109   eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c
[2020-09-24 15:11:27,927 INFO  L157   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION
[2020-09-24 15:11:27,952 INFO  L169   ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2020-09-24 15:11:27,977 INFO  L251      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2020-09-24 15:11:28,019 INFO  L375      AbstractCegarLoop]: Interprodecural is true
[2020-09-24 15:11:28,019 INFO  L376      AbstractCegarLoop]: Hoare is true
[2020-09-24 15:11:28,020 INFO  L377      AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation
[2020-09-24 15:11:28,020 INFO  L378      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2020-09-24 15:11:28,020 INFO  L379      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2020-09-24 15:11:28,020 INFO  L380      AbstractCegarLoop]: Difference is false
[2020-09-24 15:11:28,020 INFO  L381      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2020-09-24 15:11:28,021 INFO  L385      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2020-09-24 15:11:28,080 INFO  L276                IsEmpty]: Start isEmpty. Operand 1994 states.
[2020-09-24 15:11:28,178 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 918
[2020-09-24 15:11:28,179 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-24 15:11:28,181 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-24 15:11:28,182 INFO  L427      AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 15:11:28,190 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 15:11:28,191 INFO  L82        PathProgramCache]: Analyzing trace with hash -33800225, now seen corresponding path program 1 times
[2020-09-24 15:11:28,203 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 15:11:28,204 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1422856488]
[2020-09-24 15:11:28,205 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 15:11:29,115 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 15:11:30,589 WARN  L193               SmtUtils]: Spent 480.00 ms on a formula simplification that was a NOOP. DAG size: 277
[2020-09-24 15:11:30,592 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-24 15:11:30,602 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 15:11:31,385 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-09-24 15:11:31,386 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1422856488]
[2020-09-24 15:11:31,388 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-09-24 15:11:31,388 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-09-24 15:11:31,389 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040069578]
[2020-09-24 15:11:31,406 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-09-24 15:11:31,406 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-24 15:11:31,424 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-09-24 15:11:31,425 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-09-24 15:11:31,427 INFO  L87              Difference]: Start difference. First operand 1994 states. Second operand 4 states.
[2020-09-24 15:11:40,511 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-24 15:11:40,511 INFO  L93              Difference]: Finished difference Result 3363 states and 4438 transitions.
[2020-09-24 15:11:40,512 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2020-09-24 15:11:40,514 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 917
[2020-09-24 15:11:40,520 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-24 15:11:40,558 INFO  L225             Difference]: With dead ends: 3363
[2020-09-24 15:11:40,558 INFO  L226             Difference]: Without dead ends: 2747
[2020-09-24 15:11:40,568 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
[2020-09-24 15:11:40,594 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 2747 states.
[2020-09-24 15:11:40,733 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 2747 to 2734.
[2020-09-24 15:11:40,734 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 2734 states.
[2020-09-24 15:11:40,747 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 2734 states to 2734 states and 3423 transitions.
[2020-09-24 15:11:40,750 INFO  L78                 Accepts]: Start accepts. Automaton has 2734 states and 3423 transitions. Word has length 917
[2020-09-24 15:11:40,752 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-09-24 15:11:40,752 INFO  L479      AbstractCegarLoop]: Abstraction has 2734 states and 3423 transitions.
[2020-09-24 15:11:40,753 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2020-09-24 15:11:40,753 INFO  L276                IsEmpty]: Start isEmpty. Operand 2734 states and 3423 transitions.
[2020-09-24 15:11:40,851 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 918
[2020-09-24 15:11:40,851 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-24 15:11:40,853 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-24 15:11:40,853 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2020-09-24 15:11:40,854 INFO  L427      AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 15:11:40,854 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 15:11:40,855 INFO  L82        PathProgramCache]: Analyzing trace with hash -35077377, now seen corresponding path program 1 times
[2020-09-24 15:11:40,855 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 15:11:40,856 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1037252882]
[2020-09-24 15:11:40,856 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 15:11:41,285 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 15:11:42,696 WARN  L193               SmtUtils]: Spent 595.00 ms on a formula simplification that was a NOOP. DAG size: 277
[2020-09-24 15:11:42,699 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-24 15:11:42,711 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 15:11:43,706 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-09-24 15:11:43,706 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1037252882]
[2020-09-24 15:11:43,706 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-09-24 15:11:43,707 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2020-09-24 15:11:43,707 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297574729]
[2020-09-24 15:11:43,710 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 5 states
[2020-09-24 15:11:43,710 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-24 15:11:43,711 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2020-09-24 15:11:43,711 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2020-09-24 15:11:43,711 INFO  L87              Difference]: Start difference. First operand 2734 states and 3423 transitions. Second operand 5 states.
[2020-09-24 15:11:56,334 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-24 15:11:56,335 INFO  L93              Difference]: Finished difference Result 7534 states and 9564 transitions.
[2020-09-24 15:11:56,335 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2020-09-24 15:11:56,336 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 917
[2020-09-24 15:11:56,337 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-24 15:11:56,361 INFO  L225             Difference]: With dead ends: 7534
[2020-09-24 15:11:56,361 INFO  L226             Difference]: Without dead ends: 5098
[2020-09-24 15:11:56,369 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30
[2020-09-24 15:11:56,377 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 5098 states.
[2020-09-24 15:11:56,516 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 5098 to 5096.
[2020-09-24 15:11:56,517 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 5096 states.
[2020-09-24 15:11:56,537 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5096 states to 5096 states and 6428 transitions.
[2020-09-24 15:11:56,538 INFO  L78                 Accepts]: Start accepts. Automaton has 5096 states and 6428 transitions. Word has length 917
[2020-09-24 15:11:56,539 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-09-24 15:11:56,539 INFO  L479      AbstractCegarLoop]: Abstraction has 5096 states and 6428 transitions.
[2020-09-24 15:11:56,540 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2020-09-24 15:11:56,540 INFO  L276                IsEmpty]: Start isEmpty. Operand 5096 states and 6428 transitions.
[2020-09-24 15:11:56,563 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 920
[2020-09-24 15:11:56,563 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-24 15:11:56,564 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-24 15:11:56,565 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2020-09-24 15:11:56,566 INFO  L427      AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 15:11:56,570 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 15:11:56,572 INFO  L82        PathProgramCache]: Analyzing trace with hash -1772782596, now seen corresponding path program 1 times
[2020-09-24 15:11:56,572 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 15:11:56,572 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [387756536]
[2020-09-24 15:11:56,573 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 15:11:56,841 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 15:11:57,730 WARN  L193               SmtUtils]: Spent 468.00 ms on a formula simplification that was a NOOP. DAG size: 277
[2020-09-24 15:11:57,732 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-24 15:11:57,740 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 15:11:58,375 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-09-24 15:11:58,376 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [387756536]
[2020-09-24 15:11:58,376 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-09-24 15:11:58,376 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-09-24 15:11:58,377 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703573073]
[2020-09-24 15:11:58,378 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-09-24 15:11:58,378 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-24 15:11:58,379 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-09-24 15:11:58,379 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-09-24 15:11:58,379 INFO  L87              Difference]: Start difference. First operand 5096 states and 6428 transitions. Second operand 4 states.
[2020-09-24 15:12:12,923 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-24 15:12:12,923 INFO  L93              Difference]: Finished difference Result 14310 states and 18145 transitions.
[2020-09-24 15:12:12,924 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2020-09-24 15:12:12,925 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 919
[2020-09-24 15:12:12,926 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-24 15:12:12,969 INFO  L225             Difference]: With dead ends: 14310
[2020-09-24 15:12:12,969 INFO  L226             Difference]: Without dead ends: 9718
[2020-09-24 15:12:12,981 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
[2020-09-24 15:12:12,994 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 9718 states.
[2020-09-24 15:12:13,231 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 9718 to 9716.
[2020-09-24 15:12:13,231 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 9716 states.
[2020-09-24 15:12:13,253 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 9716 states to 9716 states and 12285 transitions.
[2020-09-24 15:12:13,254 INFO  L78                 Accepts]: Start accepts. Automaton has 9716 states and 12285 transitions. Word has length 919
[2020-09-24 15:12:13,255 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-09-24 15:12:13,255 INFO  L479      AbstractCegarLoop]: Abstraction has 9716 states and 12285 transitions.
[2020-09-24 15:12:13,255 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2020-09-24 15:12:13,255 INFO  L276                IsEmpty]: Start isEmpty. Operand 9716 states and 12285 transitions.
[2020-09-24 15:12:13,286 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 920
[2020-09-24 15:12:13,287 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-24 15:12:13,288 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-24 15:12:13,288 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2020-09-24 15:12:13,288 INFO  L427      AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 15:12:13,289 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 15:12:13,289 INFO  L82        PathProgramCache]: Analyzing trace with hash 2093996901, now seen corresponding path program 1 times
[2020-09-24 15:12:13,289 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 15:12:13,291 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [380765150]
[2020-09-24 15:12:13,291 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 15:12:13,498 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 15:12:14,169 WARN  L193               SmtUtils]: Spent 477.00 ms on a formula simplification that was a NOOP. DAG size: 277
[2020-09-24 15:12:14,170 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-24 15:12:14,177 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 15:12:14,839 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-09-24 15:12:14,839 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [380765150]
[2020-09-24 15:12:14,840 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-09-24 15:12:14,840 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-09-24 15:12:14,840 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287967345]
[2020-09-24 15:12:14,841 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-09-24 15:12:14,842 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-24 15:12:14,842 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-09-24 15:12:14,842 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-09-24 15:12:14,842 INFO  L87              Difference]: Start difference. First operand 9716 states and 12285 transitions. Second operand 4 states.