/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.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c


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


This is Ultimate 0.1.25-5644d1e-m
[2020-08-18 15:38:46,724 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2020-08-18 15:38:46,727 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2020-08-18 15:38:46,750 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2020-08-18 15:38:46,751 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2020-08-18 15:38:46,752 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2020-08-18 15:38:46,753 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2020-08-18 15:38:46,755 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2020-08-18 15:38:46,757 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2020-08-18 15:38:46,758 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
[2020-08-18 15:38:46,759 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
[2020-08-18 15:38:46,760 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2020-08-18 15:38:46,760 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2020-08-18 15:38:46,761 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2020-08-18 15:38:46,762 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2020-08-18 15:38:46,764 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2020-08-18 15:38:46,764 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2020-08-18 15:38:46,765 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2020-08-18 15:38:46,767 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2020-08-18 15:38:46,769 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2020-08-18 15:38:46,771 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2020-08-18 15:38:46,772 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2020-08-18 15:38:46,773 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2020-08-18 15:38:46,774 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2020-08-18 15:38:46,777 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2020-08-18 15:38:46,777 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2020-08-18 15:38:46,777 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2020-08-18 15:38:46,778 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2020-08-18 15:38:46,779 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2020-08-18 15:38:46,780 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2020-08-18 15:38:46,780 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2020-08-18 15:38:46,781 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2020-08-18 15:38:46,782 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2020-08-18 15:38:46,782 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2020-08-18 15:38:46,784 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2020-08-18 15:38:46,784 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
[2020-08-18 15:38:46,784 INFO  L184        SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2020-08-18 15:38:46,785 INFO  L184        SettingsManager]: ReqParser provides no preferences, ignoring...
[2020-08-18 15:38:46,785 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
[2020-08-18 15:38:46,786 INFO  L181        SettingsManager]: Resetting Witness Parser preferences to default values
[2020-08-18 15:38:46,786 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2020-08-18 15:38:46,787 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 15:38:46,810 INFO  L113        SettingsManager]: Loading preferences was successful
[2020-08-18 15:38:46,811 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2020-08-18 15:38:46,812 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2020-08-18 15:38:46,812 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2020-08-18 15:38:46,812 INFO  L138        SettingsManager]:  * Use SBE=true
[2020-08-18 15:38:46,812 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2020-08-18 15:38:46,813 INFO  L138        SettingsManager]:  * sizeof long=4
[2020-08-18 15:38:46,813 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2020-08-18 15:38:46,813 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2020-08-18 15:38:46,813 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2020-08-18 15:38:46,813 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2020-08-18 15:38:46,814 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2020-08-18 15:38:46,814 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2020-08-18 15:38:46,814 INFO  L138        SettingsManager]:  * sizeof long double=12
[2020-08-18 15:38:46,814 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2020-08-18 15:38:46,814 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2020-08-18 15:38:46,815 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2020-08-18 15:38:46,815 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2020-08-18 15:38:46,815 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2020-08-18 15:38:46,815 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2020-08-18 15:38:46,815 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2020-08-18 15:38:46,816 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-08-18 15:38:46,816 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2020-08-18 15:38:46,816 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2020-08-18 15:38:46,816 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2020-08-18 15:38:46,816 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2020-08-18 15:38:46,817 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-08-18 15:38:46,817 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2020-08-18 15:38:46,817 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2020-08-18 15:38:46,817 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 15:38:47,149 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2020-08-18 15:38:47,169 INFO  L258   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2020-08-18 15:38:47,174 INFO  L214   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2020-08-18 15:38:47,175 INFO  L271        PluginConnector]: Initializing CDTParser...
[2020-08-18 15:38:47,176 INFO  L275        PluginConnector]: CDTParser initialized
[2020-08-18 15:38:47,176 INFO  L429   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c
[2020-08-18 15:38:47,236 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e983e9bd7/fabb815d8dcc45a39092facb805a5fad/FLAG5b84a827c
[2020-08-18 15:38:47,889 INFO  L306              CDTParser]: Found 1 translation units.
[2020-08-18 15:38:47,890 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c
[2020-08-18 15:38:47,913 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e983e9bd7/fabb815d8dcc45a39092facb805a5fad/FLAG5b84a827c
[2020-08-18 15:38:48,103 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e983e9bd7/fabb815d8dcc45a39092facb805a5fad
[2020-08-18 15:38:48,113 INFO  L296   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2020-08-18 15:38:48,115 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2020-08-18 15:38:48,116 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2020-08-18 15:38:48,116 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2020-08-18 15:38:48,119 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2020-08-18 15:38:48,120 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 03:38:48" (1/1) ...
[2020-08-18 15:38:48,123 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@510d3a12 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:38:48, skipping insertion in model container
[2020-08-18 15:38:48,124 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 03:38:48" (1/1) ...
[2020-08-18 15:38:48,131 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2020-08-18 15:38:48,232 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2020-08-18 15:38:49,281 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-08-18 15:38:49,293 INFO  L203         MainTranslator]: Completed pre-run
[2020-08-18 15:38:49,809 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-08-18 15:38:49,854 INFO  L208         MainTranslator]: Completed translation
[2020-08-18 15:38:49,855 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:38:49 WrapperNode
[2020-08-18 15:38:49,855 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2020-08-18 15:38:49,856 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2020-08-18 15:38:49,856 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2020-08-18 15:38:49,856 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2020-08-18 15:38:49,878 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:38:49" (1/1) ...
[2020-08-18 15:38:49,881 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:38:49" (1/1) ...
[2020-08-18 15:38:49,940 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:38:49" (1/1) ...
[2020-08-18 15:38:49,941 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:38:49" (1/1) ...
[2020-08-18 15:38:50,024 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:38:49" (1/1) ...
[2020-08-18 15:38:50,061 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:38:49" (1/1) ...
[2020-08-18 15:38:50,069 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:38:49" (1/1) ...
[2020-08-18 15:38:50,083 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2020-08-18 15:38:50,083 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2020-08-18 15:38:50,084 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2020-08-18 15:38:50,084 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2020-08-18 15:38:50,086 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:38:49" (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 15:38:50,195 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2020-08-18 15:38:50,195 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2020-08-18 15:38:50,196 INFO  L138     BoogieDeclarations]: Found implementation of procedure assume_abort_if_not
[2020-08-18 15:38:50,196 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2020-08-18 15:38:50,196 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2020-08-18 15:38:50,197 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char
[2020-08-18 15:38:50,197 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar
[2020-08-18 15:38:50,197 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool
[2020-08-18 15:38:50,198 INFO  L130     BoogieDeclarations]: Found specification of procedure assert
[2020-08-18 15:38:50,198 INFO  L130     BoogieDeclarations]: Found specification of procedure abort
[2020-08-18 15:38:50,198 INFO  L130     BoogieDeclarations]: Found specification of procedure assume_abort_if_not
[2020-08-18 15:38:50,199 INFO  L130     BoogieDeclarations]: Found specification of procedure read
[2020-08-18 15:38:50,199 INFO  L130     BoogieDeclarations]: Found specification of procedure write
[2020-08-18 15:38:50,199 INFO  L130     BoogieDeclarations]: Found specification of procedure node1
[2020-08-18 15:38:50,199 INFO  L130     BoogieDeclarations]: Found specification of procedure node2
[2020-08-18 15:38:50,200 INFO  L130     BoogieDeclarations]: Found specification of procedure node3
[2020-08-18 15:38:50,200 INFO  L130     BoogieDeclarations]: Found specification of procedure node4
[2020-08-18 15:38:50,200 INFO  L130     BoogieDeclarations]: Found specification of procedure init
[2020-08-18 15:38:50,200 INFO  L130     BoogieDeclarations]: Found specification of procedure check
[2020-08-18 15:38:50,201 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2020-08-18 15:38:50,201 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2020-08-18 15:38:50,202 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2020-08-18 15:38:52,810 INFO  L290             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2020-08-18 15:38:52,810 INFO  L295             CfgBuilder]: Removed 0 assume(true) statements.
[2020-08-18 15:38:52,821 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 03:38:52 BoogieIcfgContainer
[2020-08-18 15:38:52,821 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2020-08-18 15:38:52,822 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2020-08-18 15:38:52,822 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2020-08-18 15:38:52,826 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2020-08-18 15:38:52,826 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 03:38:48" (1/3) ...
[2020-08-18 15:38:52,827 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3279484c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 03:38:52, skipping insertion in model container
[2020-08-18 15:38:52,827 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:38:49" (2/3) ...
[2020-08-18 15:38:52,828 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3279484c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 03:38:52, skipping insertion in model container
[2020-08-18 15:38:52,828 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 03:38:52" (3/3) ...
[2020-08-18 15:38:52,830 INFO  L109   eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c
[2020-08-18 15:38:52,840 INFO  L157   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION
[2020-08-18 15:38:52,849 INFO  L169   ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2020-08-18 15:38:52,863 INFO  L251      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2020-08-18 15:38:52,890 INFO  L375      AbstractCegarLoop]: Interprodecural is true
[2020-08-18 15:38:52,890 INFO  L376      AbstractCegarLoop]: Hoare is true
[2020-08-18 15:38:52,890 INFO  L377      AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation
[2020-08-18 15:38:52,890 INFO  L378      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2020-08-18 15:38:52,890 INFO  L379      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2020-08-18 15:38:52,890 INFO  L380      AbstractCegarLoop]: Difference is false
[2020-08-18 15:38:52,890 INFO  L381      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2020-08-18 15:38:52,890 INFO  L385      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2020-08-18 15:38:52,930 INFO  L276                IsEmpty]: Start isEmpty. Operand 796 states.
[2020-08-18 15:38:52,963 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 319
[2020-08-18 15:38:52,963 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-18 15:38:52,964 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]
[2020-08-18 15:38:52,965 INFO  L427      AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-18 15:38:52,971 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-18 15:38:52,972 INFO  L82        PathProgramCache]: Analyzing trace with hash 578636414, now seen corresponding path program 1 times
[2020-08-18 15:38:52,980 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-18 15:38:52,980 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [198742055]
[2020-08-18 15:38:52,981 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-18 15:38:53,708 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 15:38:54,615 WARN  L193               SmtUtils]: Spent 473.00 ms on a formula simplification that was a NOOP. DAG size: 277
[2020-08-18 15:38:54,618 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-18 15:38:54,626 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 15:38:54,821 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 15:38:54,822 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [198742055]
[2020-08-18 15:38:54,824 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-18 15:38:54,824 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-08-18 15:38:54,825 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236967634]
[2020-08-18 15:38:54,832 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-08-18 15:38:54,832 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-18 15:38:54,842 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-08-18 15:38:54,843 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-08-18 15:38:54,845 INFO  L87              Difference]: Start difference. First operand 796 states. Second operand 4 states.
[2020-08-18 15:38:55,404 WARN  L193               SmtUtils]: Spent 483.00 ms on a formula simplification that was a NOOP. DAG size: 278
[2020-08-18 15:39:00,562 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-18 15:39:00,563 INFO  L93              Difference]: Finished difference Result 1515 states and 2659 transitions.
[2020-08-18 15:39:00,569 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2020-08-18 15:39:00,570 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 318
[2020-08-18 15:39:00,572 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-18 15:39:00,604 INFO  L225             Difference]: With dead ends: 1515
[2020-08-18 15:39:00,604 INFO  L226             Difference]: Without dead ends: 1299
[2020-08-18 15:39:00,609 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2020-08-18 15:39:00,631 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 1299 states.
[2020-08-18 15:39:00,745 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 1299 to 1297.
[2020-08-18 15:39:00,747 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 1297 states.
[2020-08-18 15:39:00,754 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 1297 states to 1297 states and 2028 transitions.
[2020-08-18 15:39:00,756 INFO  L78                 Accepts]: Start accepts. Automaton has 1297 states and 2028 transitions. Word has length 318
[2020-08-18 15:39:00,758 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-18 15:39:00,758 INFO  L479      AbstractCegarLoop]: Abstraction has 1297 states and 2028 transitions.
[2020-08-18 15:39:00,758 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2020-08-18 15:39:00,759 INFO  L276                IsEmpty]: Start isEmpty. Operand 1297 states and 2028 transitions.
[2020-08-18 15:39:00,769 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 319
[2020-08-18 15:39:00,769 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-18 15:39:00,770 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]
[2020-08-18 15:39:00,771 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2020-08-18 15:39:00,771 INFO  L427      AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-18 15:39:00,771 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-18 15:39:00,771 INFO  L82        PathProgramCache]: Analyzing trace with hash 1367796252, now seen corresponding path program 1 times
[2020-08-18 15:39:00,772 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-18 15:39:00,772 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [368106962]
[2020-08-18 15:39:00,772 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-18 15:39:00,976 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 15:39:01,704 WARN  L193               SmtUtils]: Spent 561.00 ms on a formula simplification that was a NOOP. DAG size: 277
[2020-08-18 15:39:01,706 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-18 15:39:01,716 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 15:39:02,013 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 15:39:02,014 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [368106962]
[2020-08-18 15:39:02,014 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-18 15:39:02,015 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-08-18 15:39:02,015 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894200093]
[2020-08-18 15:39:02,020 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-08-18 15:39:02,020 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-18 15:39:02,020 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-08-18 15:39:02,021 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-08-18 15:39:02,021 INFO  L87              Difference]: Start difference. First operand 1297 states and 2028 transitions. Second operand 4 states.
[2020-08-18 15:39:02,645 WARN  L193               SmtUtils]: Spent 568.00 ms on a formula simplification that was a NOOP. DAG size: 278
[2020-08-18 15:39:07,015 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-18 15:39:07,015 INFO  L93              Difference]: Finished difference Result 2671 states and 4201 transitions.
[2020-08-18 15:39:07,016 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2020-08-18 15:39:07,016 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 318
[2020-08-18 15:39:07,019 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-18 15:39:07,038 INFO  L225             Difference]: With dead ends: 2671
[2020-08-18 15:39:07,039 INFO  L226             Difference]: Without dead ends: 2289
[2020-08-18 15:39:07,049 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2020-08-18 15:39:07,055 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 2289 states.
[2020-08-18 15:39:07,173 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 2289 to 2287.
[2020-08-18 15:39:07,174 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 2287 states.
[2020-08-18 15:39:07,192 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 2287 states to 2287 states and 3564 transitions.
[2020-08-18 15:39:07,192 INFO  L78                 Accepts]: Start accepts. Automaton has 2287 states and 3564 transitions. Word has length 318
[2020-08-18 15:39:07,194 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-18 15:39:07,194 INFO  L479      AbstractCegarLoop]: Abstraction has 2287 states and 3564 transitions.
[2020-08-18 15:39:07,194 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2020-08-18 15:39:07,195 INFO  L276                IsEmpty]: Start isEmpty. Operand 2287 states and 3564 transitions.
[2020-08-18 15:39:07,208 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 319
[2020-08-18 15:39:07,209 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-18 15:39:07,210 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]
[2020-08-18 15:39:07,211 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2020-08-18 15:39:07,216 INFO  L427      AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-18 15:39:07,217 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-18 15:39:07,217 INFO  L82        PathProgramCache]: Analyzing trace with hash -1797025293, now seen corresponding path program 1 times
[2020-08-18 15:39:07,217 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-18 15:39:07,218 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2033575425]
[2020-08-18 15:39:07,219 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-18 15:39:07,516 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 15:39:08,372 WARN  L193               SmtUtils]: Spent 555.00 ms on a formula simplification that was a NOOP. DAG size: 277
[2020-08-18 15:39:08,374 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-18 15:39:08,383 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 15:39:08,640 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 15:39:08,641 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2033575425]
[2020-08-18 15:39:08,642 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-18 15:39:08,642 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-08-18 15:39:08,642 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799686877]
[2020-08-18 15:39:08,644 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-08-18 15:39:08,645 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-18 15:39:08,645 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-08-18 15:39:08,646 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-08-18 15:39:08,646 INFO  L87              Difference]: Start difference. First operand 2287 states and 3564 transitions. Second operand 4 states.
[2020-08-18 15:39:09,300 WARN  L193               SmtUtils]: Spent 597.00 ms on a formula simplification that was a NOOP. DAG size: 278
[2020-08-18 15:39:13,264 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-18 15:39:13,265 INFO  L93              Difference]: Finished difference Result 4943 states and 7762 transitions.
[2020-08-18 15:39:13,266 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2020-08-18 15:39:13,266 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 318
[2020-08-18 15:39:13,267 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-18 15:39:13,288 INFO  L225             Difference]: With dead ends: 4943
[2020-08-18 15:39:13,288 INFO  L226             Difference]: Without dead ends: 4229
[2020-08-18 15:39:13,291 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2020-08-18 15:39:13,297 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 4229 states.
[2020-08-18 15:39:13,418 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 4229 to 4227.
[2020-08-18 15:39:13,418 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 4227 states.
[2020-08-18 15:39:13,432 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 4227 states to 4227 states and 6568 transitions.
[2020-08-18 15:39:13,432 INFO  L78                 Accepts]: Start accepts. Automaton has 4227 states and 6568 transitions. Word has length 318
[2020-08-18 15:39:13,433 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-18 15:39:13,433 INFO  L479      AbstractCegarLoop]: Abstraction has 4227 states and 6568 transitions.
[2020-08-18 15:39:13,433 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2020-08-18 15:39:13,434 INFO  L276                IsEmpty]: Start isEmpty. Operand 4227 states and 6568 transitions.
[2020-08-18 15:39:13,444 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 319
[2020-08-18 15:39:13,444 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-18 15:39:13,444 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]
[2020-08-18 15:39:13,445 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2020-08-18 15:39:13,445 INFO  L427      AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-18 15:39:13,445 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-18 15:39:13,445 INFO  L82        PathProgramCache]: Analyzing trace with hash 1914723175, now seen corresponding path program 1 times
[2020-08-18 15:39:13,446 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-18 15:39:13,447 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [326402761]
[2020-08-18 15:39:13,447 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-18 15:39:13,607 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 15:39:14,183 WARN  L193               SmtUtils]: Spent 371.00 ms on a formula simplification that was a NOOP. DAG size: 277
[2020-08-18 15:39:14,185 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-18 15:39:14,190 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 15:39:14,376 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 15:39:14,377 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [326402761]
[2020-08-18 15:39:14,377 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-18 15:39:14,377 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-08-18 15:39:14,378 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748407188]
[2020-08-18 15:39:14,378 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-08-18 15:39:14,379 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-18 15:39:14,379 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-08-18 15:39:14,379 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-08-18 15:39:14,379 INFO  L87              Difference]: Start difference. First operand 4227 states and 6568 transitions. Second operand 4 states.
[2020-08-18 15:39:14,821 WARN  L193               SmtUtils]: Spent 397.00 ms on a formula simplification that was a NOOP. DAG size: 278
[2020-08-18 15:39:18,777 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-18 15:39:18,777 INFO  L93              Difference]: Finished difference Result 9359 states and 14670 transitions.
[2020-08-18 15:39:18,778 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2020-08-18 15:39:18,778 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 318
[2020-08-18 15:39:18,779 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-18 15:39:18,817 INFO  L225             Difference]: With dead ends: 9359
[2020-08-18 15:39:18,817 INFO  L226             Difference]: Without dead ends: 8029
[2020-08-18 15:39:18,822 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 15:39:18,832 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 8029 states.
[2020-08-18 15:39:19,030 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 8029 to 8027.
[2020-08-18 15:39:19,030 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 8027 states.
[2020-08-18 15:39:19,057 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 8027 states to 8027 states and 12440 transitions.
[2020-08-18 15:39:19,058 INFO  L78                 Accepts]: Start accepts. Automaton has 8027 states and 12440 transitions. Word has length 318
[2020-08-18 15:39:19,058 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-18 15:39:19,059 INFO  L479      AbstractCegarLoop]: Abstraction has 8027 states and 12440 transitions.
[2020-08-18 15:39:19,059 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2020-08-18 15:39:19,059 INFO  L276                IsEmpty]: Start isEmpty. Operand 8027 states and 12440 transitions.
[2020-08-18 15:39:19,075 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 319
[2020-08-18 15:39:19,075 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-18 15:39:19,076 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]
[2020-08-18 15:39:19,076 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3
[2020-08-18 15:39:19,077 INFO  L427      AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-18 15:39:19,077 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-18 15:39:19,077 INFO  L82        PathProgramCache]: Analyzing trace with hash 769893352, now seen corresponding path program 1 times
[2020-08-18 15:39:19,077 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-18 15:39:19,078 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2074036587]
[2020-08-18 15:39:19,078 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-18 15:39:19,378 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 15:39:20,137 WARN  L193               SmtUtils]: Spent 581.00 ms on a formula simplification that was a NOOP. DAG size: 277
[2020-08-18 15:39:20,138 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-18 15:39:20,144 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 15:39:20,293 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 15:39:20,294 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2074036587]
[2020-08-18 15:39:20,294 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-18 15:39:20,294 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2020-08-18 15:39:20,294 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306444286]
[2020-08-18 15:39:20,295 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 5 states
[2020-08-18 15:39:20,295 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-18 15:39:20,296 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2020-08-18 15:39:20,296 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2020-08-18 15:39:20,296 INFO  L87              Difference]: Start difference. First operand 8027 states and 12440 transitions. Second operand 5 states.
[2020-08-18 15:39:27,319 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-18 15:39:27,320 INFO  L93              Difference]: Finished difference Result 23754 states and 36777 transitions.
[2020-08-18 15:39:27,320 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2020-08-18 15:39:27,321 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 318
[2020-08-18 15:39:27,321 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-18 15:39:27,382 INFO  L225             Difference]: With dead ends: 23754
[2020-08-18 15:39:27,383 INFO  L226             Difference]: Without dead ends: 15742
[2020-08-18 15:39:27,399 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
[2020-08-18 15:39:27,417 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 15742 states.
[2020-08-18 15:39:27,938 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 15742 to 15740.
[2020-08-18 15:39:27,938 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 15740 states.
[2020-08-18 15:39:27,964 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 15740 states to 15740 states and 24254 transitions.
[2020-08-18 15:39:27,965 INFO  L78                 Accepts]: Start accepts. Automaton has 15740 states and 24254 transitions. Word has length 318
[2020-08-18 15:39:27,965 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-18 15:39:27,965 INFO  L479      AbstractCegarLoop]: Abstraction has 15740 states and 24254 transitions.
[2020-08-18 15:39:27,966 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2020-08-18 15:39:27,966 INFO  L276                IsEmpty]: Start isEmpty. Operand 15740 states and 24254 transitions.
[2020-08-18 15:39:27,994 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 321
[2020-08-18 15:39:27,995 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-18 15:39:27,995 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]
[2020-08-18 15:39:27,995 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4
[2020-08-18 15:39:27,996 INFO  L427      AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-18 15:39:27,997 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-18 15:39:28,001 INFO  L82        PathProgramCache]: Analyzing trace with hash -685152901, now seen corresponding path program 1 times
[2020-08-18 15:39:28,001 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-18 15:39:28,002 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1550051329]
[2020-08-18 15:39:28,002 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-18 15:39:28,108 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 15:39:28,643 WARN  L193               SmtUtils]: Spent 423.00 ms on a formula simplification that was a NOOP. DAG size: 277
[2020-08-18 15:39:28,644 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-18 15:39:28,650 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 15:39:28,792 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 15:39:28,792 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1550051329]
[2020-08-18 15:39:28,800 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-18 15:39:28,801 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-08-18 15:39:28,801 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998247561]
[2020-08-18 15:39:28,801 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-08-18 15:39:28,802 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-18 15:39:28,802 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-08-18 15:39:28,802 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-08-18 15:39:28,802 INFO  L87              Difference]: Start difference. First operand 15740 states and 24254 transitions. Second operand 4 states.
[2020-08-18 15:39:37,110 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-18 15:39:37,111 INFO  L93              Difference]: Finished difference Result 46481 states and 71518 transitions.
[2020-08-18 15:39:37,111 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2020-08-18 15:39:37,112 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 320
[2020-08-18 15:39:37,112 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-18 15:39:37,177 INFO  L225             Difference]: With dead ends: 46481
[2020-08-18 15:39:37,178 INFO  L226             Difference]: Without dead ends: 30870
[2020-08-18 15:39:37,221 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-08-18 15:39:37,259 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 30870 states.
[2020-08-18 15:39:38,125 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 30870 to 30868.
[2020-08-18 15:39:38,125 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 30868 states.
[2020-08-18 15:39:38,161 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 30868 states to 30868 states and 47285 transitions.
[2020-08-18 15:39:38,161 INFO  L78                 Accepts]: Start accepts. Automaton has 30868 states and 47285 transitions. Word has length 320
[2020-08-18 15:39:38,162 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-18 15:39:38,162 INFO  L479      AbstractCegarLoop]: Abstraction has 30868 states and 47285 transitions.
[2020-08-18 15:39:38,162 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2020-08-18 15:39:38,162 INFO  L276                IsEmpty]: Start isEmpty. Operand 30868 states and 47285 transitions.
[2020-08-18 15:39:38,213 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 321
[2020-08-18 15:39:38,213 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-18 15:39:38,213 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]
[2020-08-18 15:39:38,214 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5
[2020-08-18 15:39:38,214 INFO  L427      AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-18 15:39:38,214 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-18 15:39:38,214 INFO  L82        PathProgramCache]: Analyzing trace with hash -810813248, now seen corresponding path program 1 times
[2020-08-18 15:39:38,214 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-18 15:39:38,215 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [98295537]
[2020-08-18 15:39:38,215 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-18 15:39:38,249 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 15:39:38,677 WARN  L193               SmtUtils]: Spent 360.00 ms on a formula simplification that was a NOOP. DAG size: 277
[2020-08-18 15:39:38,679 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-18 15:39:38,683 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 15:39:38,765 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 15:39:38,765 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [98295537]
[2020-08-18 15:39:38,766 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-18 15:39:38,766 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-08-18 15:39:38,766 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976148339]
[2020-08-18 15:39:38,767 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-08-18 15:39:38,767 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-18 15:39:38,767 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-08-18 15:39:38,767 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-08-18 15:39:38,768 INFO  L87              Difference]: Start difference. First operand 30868 states and 47285 transitions. Second operand 4 states.