/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration false -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c


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


This is Ultimate 0.1.25-5644d1e-m
[2020-08-18 10:42:29,547 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2020-08-18 10:42:29,551 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2020-08-18 10:42:29,594 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2020-08-18 10:42:29,595 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2020-08-18 10:42:29,604 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2020-08-18 10:42:29,608 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2020-08-18 10:42:29,612 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2020-08-18 10:42:29,615 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2020-08-18 10:42:29,619 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
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[2020-08-18 10:42:29,623 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2020-08-18 10:42:29,626 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2020-08-18 10:42:29,628 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2020-08-18 10:42:29,630 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2020-08-18 10:42:29,632 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2020-08-18 10:42:29,633 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2020-08-18 10:42:29,634 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2020-08-18 10:42:29,642 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2020-08-18 10:42:29,645 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2020-08-18 10:42:29,646 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2020-08-18 10:42:29,647 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2020-08-18 10:42:29,647 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2020-08-18 10:42:29,659 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2020-08-18 10:42:29,660 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2020-08-18 10:42:29,660 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2020-08-18 10:42:29,661 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2020-08-18 10:42:29,665 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2020-08-18 10:42:29,666 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2020-08-18 10:42:29,666 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
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[2020-08-18 10:42:29,671 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2020-08-18 10:42:29,671 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2020-08-18 10:42:29,675 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2020-08-18 10:42:29,675 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
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[2020-08-18 10:42:29,678 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
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[2020-08-18 10:42:29,680 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2020-08-18 10:42:29,684 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 10:42:29,722 INFO  L113        SettingsManager]: Loading preferences was successful
[2020-08-18 10:42:29,722 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2020-08-18 10:42:29,723 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2020-08-18 10:42:29,724 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2020-08-18 10:42:29,724 INFO  L138        SettingsManager]:  * Use SBE=true
[2020-08-18 10:42:29,724 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2020-08-18 10:42:29,724 INFO  L138        SettingsManager]:  * sizeof long=4
[2020-08-18 10:42:29,724 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2020-08-18 10:42:29,725 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2020-08-18 10:42:29,725 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2020-08-18 10:42:29,725 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2020-08-18 10:42:29,725 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2020-08-18 10:42:29,725 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2020-08-18 10:42:29,726 INFO  L138        SettingsManager]:  * sizeof long double=12
[2020-08-18 10:42:29,726 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2020-08-18 10:42:29,726 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2020-08-18 10:42:29,726 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2020-08-18 10:42:29,726 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2020-08-18 10:42:29,727 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2020-08-18 10:42:29,727 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2020-08-18 10:42:29,727 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2020-08-18 10:42:29,727 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-08-18 10:42:29,727 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2020-08-18 10:42:29,728 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2020-08-18 10:42:29,728 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2020-08-18 10:42:29,728 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2020-08-18 10:42:29,728 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-08-18 10:42:29,728 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2020-08-18 10:42:29,729 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2020-08-18 10:42:29,729 INFO  L138        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> false
[2020-08-18 10:42:30,075 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2020-08-18 10:42:30,093 INFO  L258   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2020-08-18 10:42:30,105 INFO  L214   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2020-08-18 10:42:30,106 INFO  L271        PluginConnector]: Initializing CDTParser...
[2020-08-18 10:42:30,107 INFO  L275        PluginConnector]: CDTParser initialized
[2020-08-18 10:42:30,108 INFO  L429   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c
[2020-08-18 10:42:30,167 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d01f0b16a/29c403d3d6a243c48b9c0d60b442f330/FLAGd478cff47
[2020-08-18 10:42:30,822 INFO  L306              CDTParser]: Found 1 translation units.
[2020-08-18 10:42:30,823 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c
[2020-08-18 10:42:30,848 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d01f0b16a/29c403d3d6a243c48b9c0d60b442f330/FLAGd478cff47
[2020-08-18 10:42:30,983 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d01f0b16a/29c403d3d6a243c48b9c0d60b442f330
[2020-08-18 10:42:30,991 INFO  L296   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2020-08-18 10:42:30,992 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2020-08-18 10:42:30,993 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2020-08-18 10:42:30,993 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2020-08-18 10:42:30,997 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2020-08-18 10:42:30,998 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 10:42:30" (1/1) ...
[2020-08-18 10:42:31,001 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@57f9529c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:42:30, skipping insertion in model container
[2020-08-18 10:42:31,001 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 10:42:30" (1/1) ...
[2020-08-18 10:42:31,009 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2020-08-18 10:42:31,132 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2020-08-18 10:42:32,255 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-08-18 10:42:32,268 INFO  L203         MainTranslator]: Completed pre-run
[2020-08-18 10:42:32,791 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-08-18 10:42:32,828 INFO  L208         MainTranslator]: Completed translation
[2020-08-18 10:42:32,829 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:42:32 WrapperNode
[2020-08-18 10:42:32,829 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2020-08-18 10:42:32,830 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2020-08-18 10:42:32,830 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2020-08-18 10:42:32,830 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2020-08-18 10:42:32,852 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:42:32" (1/1) ...
[2020-08-18 10:42:32,854 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:42:32" (1/1) ...
[2020-08-18 10:42:32,916 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:42:32" (1/1) ...
[2020-08-18 10:42:32,916 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:42:32" (1/1) ...
[2020-08-18 10:42:32,988 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:42:32" (1/1) ...
[2020-08-18 10:42:33,023 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:42:32" (1/1) ...
[2020-08-18 10:42:33,034 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:42:32" (1/1) ...
[2020-08-18 10:42:33,051 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2020-08-18 10:42:33,055 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2020-08-18 10:42:33,055 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2020-08-18 10:42:33,055 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2020-08-18 10:42:33,058 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:42:32" (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 10:42:33,156 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2020-08-18 10:42:33,157 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2020-08-18 10:42:33,157 INFO  L138     BoogieDeclarations]: Found implementation of procedure assume_abort_if_not
[2020-08-18 10:42:33,157 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2020-08-18 10:42:33,157 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2020-08-18 10:42:33,158 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char
[2020-08-18 10:42:33,158 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar
[2020-08-18 10:42:33,159 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool
[2020-08-18 10:42:33,160 INFO  L130     BoogieDeclarations]: Found specification of procedure assert
[2020-08-18 10:42:33,160 INFO  L130     BoogieDeclarations]: Found specification of procedure abort
[2020-08-18 10:42:33,160 INFO  L130     BoogieDeclarations]: Found specification of procedure assume_abort_if_not
[2020-08-18 10:42:33,161 INFO  L130     BoogieDeclarations]: Found specification of procedure read
[2020-08-18 10:42:33,161 INFO  L130     BoogieDeclarations]: Found specification of procedure write
[2020-08-18 10:42:33,162 INFO  L130     BoogieDeclarations]: Found specification of procedure node1
[2020-08-18 10:42:33,162 INFO  L130     BoogieDeclarations]: Found specification of procedure node2
[2020-08-18 10:42:33,163 INFO  L130     BoogieDeclarations]: Found specification of procedure node3
[2020-08-18 10:42:33,164 INFO  L130     BoogieDeclarations]: Found specification of procedure node4
[2020-08-18 10:42:33,164 INFO  L130     BoogieDeclarations]: Found specification of procedure init
[2020-08-18 10:42:33,164 INFO  L130     BoogieDeclarations]: Found specification of procedure check
[2020-08-18 10:42:33,165 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2020-08-18 10:42:33,165 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2020-08-18 10:42:33,165 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2020-08-18 10:42:35,699 INFO  L290             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2020-08-18 10:42:35,699 INFO  L295             CfgBuilder]: Removed 0 assume(true) statements.
[2020-08-18 10:42:35,709 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 10:42:35 BoogieIcfgContainer
[2020-08-18 10:42:35,709 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2020-08-18 10:42:35,711 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2020-08-18 10:42:35,711 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2020-08-18 10:42:35,714 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2020-08-18 10:42:35,715 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 10:42:30" (1/3) ...
[2020-08-18 10:42:35,716 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d5ab9a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 10:42:35, skipping insertion in model container
[2020-08-18 10:42:35,716 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:42:32" (2/3) ...
[2020-08-18 10:42:35,716 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d5ab9a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 10:42:35, skipping insertion in model container
[2020-08-18 10:42:35,716 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 10:42:35" (3/3) ...
[2020-08-18 10:42:35,718 INFO  L109   eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c
[2020-08-18 10:42:35,756 INFO  L157   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION
[2020-08-18 10:42:35,766 INFO  L169   ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2020-08-18 10:42:35,782 INFO  L251      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2020-08-18 10:42:35,816 INFO  L375      AbstractCegarLoop]: Interprodecural is true
[2020-08-18 10:42:35,817 INFO  L376      AbstractCegarLoop]: Hoare is true
[2020-08-18 10:42:35,817 INFO  L377      AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation
[2020-08-18 10:42:35,817 INFO  L378      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2020-08-18 10:42:35,817 INFO  L379      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2020-08-18 10:42:35,817 INFO  L380      AbstractCegarLoop]: Difference is false
[2020-08-18 10:42:35,817 INFO  L381      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2020-08-18 10:42:35,818 INFO  L385      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2020-08-18 10:42:35,862 INFO  L276                IsEmpty]: Start isEmpty. Operand 808 states.
[2020-08-18 10:42:35,906 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 331
[2020-08-18 10:42:35,906 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-18 10:42:35,908 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 10:42:35,908 INFO  L427      AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-18 10:42:35,917 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-18 10:42:35,918 INFO  L82        PathProgramCache]: Analyzing trace with hash 1078138388, now seen corresponding path program 1 times
[2020-08-18 10:42:35,927 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-18 10:42:35,927 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1195601947]
[2020-08-18 10:42:35,928 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-18 10:42:36,620 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 10:42:37,564 WARN  L193               SmtUtils]: Spent 476.00 ms on a formula simplification that was a NOOP. DAG size: 277
[2020-08-18 10:42:37,570 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-18 10:42:37,580 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 10:42:37,810 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 10:42:37,811 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1195601947]
[2020-08-18 10:42:37,813 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-18 10:42:37,814 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-08-18 10:42:37,815 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987534459]
[2020-08-18 10:42:37,823 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-08-18 10:42:37,823 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-18 10:42:37,837 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-08-18 10:42:37,838 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-08-18 10:42:37,840 INFO  L87              Difference]: Start difference. First operand 808 states. Second operand 4 states.
[2020-08-18 10:42:38,336 WARN  L193               SmtUtils]: Spent 428.00 ms on a formula simplification that was a NOOP. DAG size: 278
[2020-08-18 10:42:43,302 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-18 10:42:43,303 INFO  L93              Difference]: Finished difference Result 1527 states and 2683 transitions.
[2020-08-18 10:42:43,304 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2020-08-18 10:42:43,306 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 330
[2020-08-18 10:42:43,308 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-18 10:42:43,386 INFO  L225             Difference]: With dead ends: 1527
[2020-08-18 10:42:43,386 INFO  L226             Difference]: Without dead ends: 1311
[2020-08-18 10:42:43,396 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2020-08-18 10:42:43,423 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 1311 states.
[2020-08-18 10:42:43,563 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 1311 to 1309.
[2020-08-18 10:42:43,564 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 1309 states.
[2020-08-18 10:42:43,572 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 1309 states to 1309 states and 2040 transitions.
[2020-08-18 10:42:43,574 INFO  L78                 Accepts]: Start accepts. Automaton has 1309 states and 2040 transitions. Word has length 330
[2020-08-18 10:42:43,579 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-18 10:42:43,579 INFO  L479      AbstractCegarLoop]: Abstraction has 1309 states and 2040 transitions.
[2020-08-18 10:42:43,579 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2020-08-18 10:42:43,579 INFO  L276                IsEmpty]: Start isEmpty. Operand 1309 states and 2040 transitions.
[2020-08-18 10:42:43,591 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 331
[2020-08-18 10:42:43,591 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-18 10:42:43,592 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 10:42:43,592 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2020-08-18 10:42:43,593 INFO  L427      AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-18 10:42:43,593 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-18 10:42:43,593 INFO  L82        PathProgramCache]: Analyzing trace with hash 1867298226, now seen corresponding path program 1 times
[2020-08-18 10:42:43,594 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-18 10:42:43,594 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [498803020]
[2020-08-18 10:42:43,595 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-18 10:42:43,849 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 10:42:44,657 WARN  L193               SmtUtils]: Spent 549.00 ms on a formula simplification that was a NOOP. DAG size: 277
[2020-08-18 10:42:44,659 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-18 10:42:44,668 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 10:42:45,015 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 10:42:45,016 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [498803020]
[2020-08-18 10:42:45,017 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-18 10:42:45,017 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-08-18 10:42:45,017 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094466063]
[2020-08-18 10:42:45,022 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-08-18 10:42:45,023 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-18 10:42:45,023 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-08-18 10:42:45,023 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-08-18 10:42:45,024 INFO  L87              Difference]: Start difference. First operand 1309 states and 2040 transitions. Second operand 4 states.
[2020-08-18 10:42:45,455 WARN  L193               SmtUtils]: Spent 372.00 ms on a formula simplification that was a NOOP. DAG size: 278
[2020-08-18 10:42:49,752 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-18 10:42:49,752 INFO  L93              Difference]: Finished difference Result 2683 states and 4213 transitions.
[2020-08-18 10:42:49,753 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2020-08-18 10:42:49,753 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 330
[2020-08-18 10:42:49,755 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-18 10:42:49,770 INFO  L225             Difference]: With dead ends: 2683
[2020-08-18 10:42:49,771 INFO  L226             Difference]: Without dead ends: 2301
[2020-08-18 10:42:49,774 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2020-08-18 10:42:49,778 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 2301 states.
[2020-08-18 10:42:49,875 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 2301 to 2299.
[2020-08-18 10:42:49,877 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 2299 states.
[2020-08-18 10:42:49,895 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 2299 states to 2299 states and 3576 transitions.
[2020-08-18 10:42:49,895 INFO  L78                 Accepts]: Start accepts. Automaton has 2299 states and 3576 transitions. Word has length 330
[2020-08-18 10:42:49,896 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-18 10:42:49,897 INFO  L479      AbstractCegarLoop]: Abstraction has 2299 states and 3576 transitions.
[2020-08-18 10:42:49,897 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2020-08-18 10:42:49,897 INFO  L276                IsEmpty]: Start isEmpty. Operand 2299 states and 3576 transitions.
[2020-08-18 10:42:49,911 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 331
[2020-08-18 10:42:49,912 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-18 10:42:49,914 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 10:42:49,916 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2020-08-18 10:42:49,924 INFO  L427      AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-18 10:42:49,925 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-18 10:42:49,925 INFO  L82        PathProgramCache]: Analyzing trace with hash -1297523319, now seen corresponding path program 1 times
[2020-08-18 10:42:49,925 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-18 10:42:49,926 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [427054864]
[2020-08-18 10:42:49,926 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-18 10:42:50,234 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 10:42:50,849 WARN  L193               SmtUtils]: Spent 368.00 ms on a formula simplification that was a NOOP. DAG size: 277
[2020-08-18 10:42:50,851 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-18 10:42:50,860 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 10:42:51,080 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 10:42:51,081 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [427054864]
[2020-08-18 10:42:51,082 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-18 10:42:51,082 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-08-18 10:42:51,082 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974159575]
[2020-08-18 10:42:51,083 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-08-18 10:42:51,084 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-18 10:42:51,084 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-08-18 10:42:51,085 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-08-18 10:42:51,085 INFO  L87              Difference]: Start difference. First operand 2299 states and 3576 transitions. Second operand 4 states.
[2020-08-18 10:42:51,486 WARN  L193               SmtUtils]: Spent 362.00 ms on a formula simplification that was a NOOP. DAG size: 278
[2020-08-18 10:42:55,474 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-18 10:42:55,475 INFO  L93              Difference]: Finished difference Result 4867 states and 7634 transitions.
[2020-08-18 10:42:55,475 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2020-08-18 10:42:55,475 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 330
[2020-08-18 10:42:55,476 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-18 10:42:55,497 INFO  L225             Difference]: With dead ends: 4867
[2020-08-18 10:42:55,498 INFO  L226             Difference]: Without dead ends: 4201
[2020-08-18 10:42:55,501 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2020-08-18 10:42:55,507 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 4201 states.
[2020-08-18 10:42:55,668 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 4201 to 4199.
[2020-08-18 10:42:55,669 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 4199 states.
[2020-08-18 10:42:55,682 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 4199 states to 4199 states and 6516 transitions.
[2020-08-18 10:42:55,682 INFO  L78                 Accepts]: Start accepts. Automaton has 4199 states and 6516 transitions. Word has length 330
[2020-08-18 10:42:55,683 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-18 10:42:55,683 INFO  L479      AbstractCegarLoop]: Abstraction has 4199 states and 6516 transitions.
[2020-08-18 10:42:55,683 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2020-08-18 10:42:55,683 INFO  L276                IsEmpty]: Start isEmpty. Operand 4199 states and 6516 transitions.
[2020-08-18 10:42:55,694 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 331
[2020-08-18 10:42:55,694 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-18 10:42:55,694 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 10:42:55,695 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2020-08-18 10:42:55,695 INFO  L427      AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-18 10:42:55,695 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-18 10:42:55,695 INFO  L82        PathProgramCache]: Analyzing trace with hash 1852614154, now seen corresponding path program 1 times
[2020-08-18 10:42:55,696 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-18 10:42:55,696 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1098154402]
[2020-08-18 10:42:55,697 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-18 10:42:56,067 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 10:42:56,636 WARN  L193               SmtUtils]: Spent 391.00 ms on a formula simplification that was a NOOP. DAG size: 277
[2020-08-18 10:42:56,637 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-18 10:42:56,642 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 10:42:56,801 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 10:42:56,802 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1098154402]
[2020-08-18 10:42:56,802 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-18 10:42:56,802 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2020-08-18 10:42:56,803 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967674558]
[2020-08-18 10:42:56,803 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 5 states
[2020-08-18 10:42:56,804 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-18 10:42:56,804 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2020-08-18 10:42:56,804 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2020-08-18 10:42:56,804 INFO  L87              Difference]: Start difference. First operand 4199 states and 6516 transitions. Second operand 5 states.
[2020-08-18 10:43:03,595 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-18 10:43:03,595 INFO  L93              Difference]: Finished difference Result 12414 states and 19245 transitions.
[2020-08-18 10:43:03,596 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2020-08-18 10:43:03,596 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 330
[2020-08-18 10:43:03,596 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-18 10:43:03,634 INFO  L225             Difference]: With dead ends: 12414
[2020-08-18 10:43:03,634 INFO  L226             Difference]: Without dead ends: 8230
[2020-08-18 10:43:03,643 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30
[2020-08-18 10:43:03,653 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 8230 states.
[2020-08-18 10:43:03,970 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 8230 to 8228.
[2020-08-18 10:43:03,971 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 8228 states.
[2020-08-18 10:43:03,997 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 8228 states to 8228 states and 12694 transitions.
[2020-08-18 10:43:03,997 INFO  L78                 Accepts]: Start accepts. Automaton has 8228 states and 12694 transitions. Word has length 330
[2020-08-18 10:43:03,998 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-18 10:43:03,998 INFO  L479      AbstractCegarLoop]: Abstraction has 8228 states and 12694 transitions.
[2020-08-18 10:43:03,998 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2020-08-18 10:43:03,998 INFO  L276                IsEmpty]: Start isEmpty. Operand 8228 states and 12694 transitions.
[2020-08-18 10:43:04,072 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 333
[2020-08-18 10:43:04,072 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-18 10:43:04,073 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 10:43:04,073 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3
[2020-08-18 10:43:04,073 INFO  L427      AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-18 10:43:04,074 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-18 10:43:04,074 INFO  L82        PathProgramCache]: Analyzing trace with hash 569689837, now seen corresponding path program 1 times
[2020-08-18 10:43:04,074 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-18 10:43:04,075 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [757846977]
[2020-08-18 10:43:04,075 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-18 10:43:04,192 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 10:43:04,669 WARN  L193               SmtUtils]: Spent 351.00 ms on a formula simplification that was a NOOP. DAG size: 277
[2020-08-18 10:43:04,670 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-18 10:43:04,676 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 10:43:04,789 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 10:43:04,790 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [757846977]
[2020-08-18 10:43:04,790 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-18 10:43:04,790 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-08-18 10:43:04,790 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460149732]
[2020-08-18 10:43:04,791 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-08-18 10:43:04,792 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-18 10:43:04,792 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-08-18 10:43:04,792 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-08-18 10:43:04,792 INFO  L87              Difference]: Start difference. First operand 8228 states and 12694 transitions. Second operand 4 states.
[2020-08-18 10:43:12,405 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-18 10:43:12,406 INFO  L93              Difference]: Finished difference Result 24233 states and 37318 transitions.
[2020-08-18 10:43:12,406 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2020-08-18 10:43:12,407 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 332
[2020-08-18 10:43:12,407 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-18 10:43:12,465 INFO  L225             Difference]: With dead ends: 24233
[2020-08-18 10:43:12,465 INFO  L226             Difference]: Without dead ends: 16134
[2020-08-18 10:43:12,481 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-08-18 10:43:12,497 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 16134 states.
[2020-08-18 10:43:13,039 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 16134 to 16132.
[2020-08-18 10:43:13,039 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 16132 states.
[2020-08-18 10:43:13,067 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 16132 states to 16132 states and 24741 transitions.
[2020-08-18 10:43:13,067 INFO  L78                 Accepts]: Start accepts. Automaton has 16132 states and 24741 transitions. Word has length 332
[2020-08-18 10:43:13,068 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-18 10:43:13,068 INFO  L479      AbstractCegarLoop]: Abstraction has 16132 states and 24741 transitions.
[2020-08-18 10:43:13,068 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2020-08-18 10:43:13,068 INFO  L276                IsEmpty]: Start isEmpty. Operand 16132 states and 24741 transitions.
[2020-08-18 10:43:13,101 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 333
[2020-08-18 10:43:13,101 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-18 10:43:13,102 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 10:43:13,102 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4
[2020-08-18 10:43:13,102 INFO  L427      AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-18 10:43:13,102 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-18 10:43:13,104 INFO  L82        PathProgramCache]: Analyzing trace with hash -310142286, now seen corresponding path program 1 times
[2020-08-18 10:43:13,108 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-18 10:43:13,108 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1472050888]
[2020-08-18 10:43:13,108 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-18 10:43:13,147 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 10:43:13,574 WARN  L193               SmtUtils]: Spent 360.00 ms on a formula simplification that was a NOOP. DAG size: 277
[2020-08-18 10:43:13,576 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-18 10:43:13,580 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 10:43:13,665 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 10:43:13,666 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1472050888]
[2020-08-18 10:43:13,667 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-18 10:43:13,672 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-08-18 10:43:13,673 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102610792]
[2020-08-18 10:43:13,674 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-08-18 10:43:13,674 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-18 10:43:13,674 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-08-18 10:43:13,674 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-08-18 10:43:13,675 INFO  L87              Difference]: Start difference. First operand 16132 states and 24741 transitions. Second operand 4 states.
[2020-08-18 10:43:21,992 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-18 10:43:21,993 INFO  L93              Difference]: Finished difference Result 48321 states and 74099 transitions.
[2020-08-18 10:43:21,993 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2020-08-18 10:43:21,993 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 332
[2020-08-18 10:43:21,993 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-18 10:43:22,061 INFO  L225             Difference]: With dead ends: 48321
[2020-08-18 10:43:22,062 INFO  L226             Difference]: Without dead ends: 32231
[2020-08-18 10:43:22,100 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-08-18 10:43:22,142 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 32231 states.
[2020-08-18 10:43:23,634 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 32231 to 16151.
[2020-08-18 10:43:23,635 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 16151 states.
[2020-08-18 10:43:23,661 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 16151 states to 16151 states and 24769 transitions.
[2020-08-18 10:43:23,662 INFO  L78                 Accepts]: Start accepts. Automaton has 16151 states and 24769 transitions. Word has length 332
[2020-08-18 10:43:23,662 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-18 10:43:23,662 INFO  L479      AbstractCegarLoop]: Abstraction has 16151 states and 24769 transitions.
[2020-08-18 10:43:23,662 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2020-08-18 10:43:23,662 INFO  L276                IsEmpty]: Start isEmpty. Operand 16151 states and 24769 transitions.
[2020-08-18 10:43:23,692 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 334
[2020-08-18 10:43:23,692 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-18 10:43:23,692 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 10:43:23,693 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5
[2020-08-18 10:43:23,693 INFO  L427      AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-18 10:43:23,693 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-18 10:43:23,693 INFO  L82        PathProgramCache]: Analyzing trace with hash -1868318850, now seen corresponding path program 1 times
[2020-08-18 10:43:23,694 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-18 10:43:23,694 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1086764938]
[2020-08-18 10:43:23,694 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-18 10:43:23,730 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 10:43:24,265 WARN  L193               SmtUtils]: Spent 452.00 ms on a formula simplification that was a NOOP. DAG size: 277
[2020-08-18 10:43:24,266 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-18 10:43:24,273 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 10:43:24,441 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 10:43:24,443 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1086764938]
[2020-08-18 10:43:24,444 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-18 10:43:24,445 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-08-18 10:43:24,445 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631395660]
[2020-08-18 10:43:24,446 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-08-18 10:43:24,446 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-18 10:43:24,447 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-08-18 10:43:24,447 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-08-18 10:43:24,447 INFO  L87              Difference]: Start difference. First operand 16151 states and 24769 transitions. Second operand 4 states.