/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration false -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.1.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c


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


This is Ultimate 0.1.25-c90d42b
[2020-09-24 15:10:01,373 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2020-09-24 15:10:01,377 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2020-09-24 15:10:01,404 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2020-09-24 15:10:01,404 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2020-09-24 15:10:01,405 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2020-09-24 15:10:01,407 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2020-09-24 15:10:01,409 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2020-09-24 15:10:01,411 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2020-09-24 15:10:01,412 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
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[2020-09-24 15:10:01,415 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2020-09-24 15:10:01,416 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2020-09-24 15:10:01,417 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2020-09-24 15:10:01,419 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2020-09-24 15:10:01,420 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2020-09-24 15:10:01,421 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2020-09-24 15:10:01,423 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2020-09-24 15:10:01,425 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2020-09-24 15:10:01,427 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2020-09-24 15:10:01,428 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2020-09-24 15:10:01,431 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2020-09-24 15:10:01,432 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2020-09-24 15:10:01,438 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2020-09-24 15:10:01,438 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2020-09-24 15:10:01,438 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2020-09-24 15:10:01,439 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2020-09-24 15:10:01,442 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2020-09-24 15:10:01,444 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2020-09-24 15:10:01,444 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2020-09-24 15:10:01,445 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2020-09-24 15:10:01,446 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2020-09-24 15:10:01,447 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2020-09-24 15:10:01,449 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2020-09-24 15:10:01,449 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
[2020-09-24 15:10:01,450 INFO  L184        SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
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[2020-09-24 15:10:01,450 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
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[2020-09-24 15:10:01,463 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2020-09-24 15:10:01,469 INFO  L101        SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf
[2020-09-24 15:10:01,517 INFO  L113        SettingsManager]: Loading preferences was successful
[2020-09-24 15:10:01,517 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2020-09-24 15:10:01,519 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2020-09-24 15:10:01,519 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2020-09-24 15:10:01,520 INFO  L138        SettingsManager]:  * Use SBE=true
[2020-09-24 15:10:01,520 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2020-09-24 15:10:01,520 INFO  L138        SettingsManager]:  * sizeof long=4
[2020-09-24 15:10:01,520 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2020-09-24 15:10:01,521 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2020-09-24 15:10:01,521 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2020-09-24 15:10:01,522 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2020-09-24 15:10:01,522 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2020-09-24 15:10:01,522 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2020-09-24 15:10:01,523 INFO  L138        SettingsManager]:  * sizeof long double=12
[2020-09-24 15:10:01,523 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2020-09-24 15:10:01,523 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2020-09-24 15:10:01,523 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2020-09-24 15:10:01,524 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2020-09-24 15:10:01,524 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2020-09-24 15:10:01,524 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2020-09-24 15:10:01,524 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2020-09-24 15:10:01,524 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-09-24 15:10:01,525 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2020-09-24 15:10:01,525 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2020-09-24 15:10:01,525 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2020-09-24 15:10:01,525 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2020-09-24 15:10:01,526 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-09-24 15:10:01,526 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2020-09-24 15:10:01,526 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2020-09-24 15:10:01,526 INFO  L138        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SingleStatement
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> false
[2020-09-24 15:10:02,046 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2020-09-24 15:10:02,068 INFO  L258   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2020-09-24 15:10:02,073 INFO  L214   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2020-09-24 15:10:02,075 INFO  L271        PluginConnector]: Initializing CDTParser...
[2020-09-24 15:10:02,075 INFO  L275        PluginConnector]: CDTParser initialized
[2020-09-24 15:10:02,076 INFO  L429   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.1.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c
[2020-09-24 15:10:02,161 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/dfb243ea6/822fb9dadbe643ff89c60350e47dcc89/FLAG1b42db0b5
[2020-09-24 15:10:02,809 INFO  L306              CDTParser]: Found 1 translation units.
[2020-09-24 15:10:02,810 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.1.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c
[2020-09-24 15:10:02,827 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/dfb243ea6/822fb9dadbe643ff89c60350e47dcc89/FLAG1b42db0b5
[2020-09-24 15:10:03,047 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/dfb243ea6/822fb9dadbe643ff89c60350e47dcc89
[2020-09-24 15:10:03,060 INFO  L296   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2020-09-24 15:10:03,065 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2020-09-24 15:10:03,066 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2020-09-24 15:10:03,067 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2020-09-24 15:10:03,073 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2020-09-24 15:10:03,074 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 03:10:03" (1/1) ...
[2020-09-24 15:10:03,079 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@77a39a0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:10:03, skipping insertion in model container
[2020-09-24 15:10:03,079 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 03:10:03" (1/1) ...
[2020-09-24 15:10:03,090 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2020-09-24 15:10:03,182 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2020-09-24 15:10:03,840 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-09-24 15:10:03,864 INFO  L203         MainTranslator]: Completed pre-run
[2020-09-24 15:10:04,329 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-09-24 15:10:04,357 INFO  L208         MainTranslator]: Completed translation
[2020-09-24 15:10:04,358 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:10:04 WrapperNode
[2020-09-24 15:10:04,358 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2020-09-24 15:10:04,359 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2020-09-24 15:10:04,359 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2020-09-24 15:10:04,359 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2020-09-24 15:10:04,378 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:10:04" (1/1) ...
[2020-09-24 15:10:04,379 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:10:04" (1/1) ...
[2020-09-24 15:10:04,407 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:10:04" (1/1) ...
[2020-09-24 15:10:04,407 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:10:04" (1/1) ...
[2020-09-24 15:10:04,462 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:10:04" (1/1) ...
[2020-09-24 15:10:04,481 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:10:04" (1/1) ...
[2020-09-24 15:10:04,488 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:10:04" (1/1) ...
[2020-09-24 15:10:04,504 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2020-09-24 15:10:04,505 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2020-09-24 15:10:04,506 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2020-09-24 15:10:04,506 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2020-09-24 15:10:04,509 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:10:04" (1/1) ...
No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-09-24 15:10:04,622 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2020-09-24 15:10:04,622 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2020-09-24 15:10:04,622 INFO  L138     BoogieDeclarations]: Found implementation of procedure assume_abort_if_not
[2020-09-24 15:10:04,623 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2020-09-24 15:10:04,623 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2020-09-24 15:10:04,624 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char
[2020-09-24 15:10:04,624 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool
[2020-09-24 15:10:04,624 INFO  L130     BoogieDeclarations]: Found specification of procedure assert
[2020-09-24 15:10:04,624 INFO  L130     BoogieDeclarations]: Found specification of procedure abort
[2020-09-24 15:10:04,624 INFO  L130     BoogieDeclarations]: Found specification of procedure assume_abort_if_not
[2020-09-24 15:10:04,625 INFO  L130     BoogieDeclarations]: Found specification of procedure read
[2020-09-24 15:10:04,626 INFO  L130     BoogieDeclarations]: Found specification of procedure write
[2020-09-24 15:10:04,626 INFO  L130     BoogieDeclarations]: Found specification of procedure node1
[2020-09-24 15:10:04,626 INFO  L130     BoogieDeclarations]: Found specification of procedure node2
[2020-09-24 15:10:04,626 INFO  L130     BoogieDeclarations]: Found specification of procedure node3
[2020-09-24 15:10:04,627 INFO  L130     BoogieDeclarations]: Found specification of procedure init
[2020-09-24 15:10:04,627 INFO  L130     BoogieDeclarations]: Found specification of procedure check
[2020-09-24 15:10:04,628 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2020-09-24 15:10:04,628 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2020-09-24 15:10:04,628 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2020-09-24 15:10:06,610 INFO  L290             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2020-09-24 15:10:06,611 INFO  L295             CfgBuilder]: Removed 0 assume(true) statements.
[2020-09-24 15:10:06,624 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 03:10:06 BoogieIcfgContainer
[2020-09-24 15:10:06,624 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2020-09-24 15:10:06,625 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2020-09-24 15:10:06,626 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2020-09-24 15:10:06,630 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2020-09-24 15:10:06,630 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 03:10:03" (1/3) ...
[2020-09-24 15:10:06,631 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1179bd72 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 03:10:06, skipping insertion in model container
[2020-09-24 15:10:06,631 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:10:04" (2/3) ...
[2020-09-24 15:10:06,631 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1179bd72 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 03:10:06, skipping insertion in model container
[2020-09-24 15:10:06,632 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 03:10:06" (3/3) ...
[2020-09-24 15:10:06,634 INFO  L109   eAbstractionObserver]: Analyzing ICFG pals_floodmax.3.1.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c
[2020-09-24 15:10:06,646 INFO  L157   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION
[2020-09-24 15:10:06,659 INFO  L169   ceAbstractionStarter]: Appying trace abstraction to program that has 5 error locations.
[2020-09-24 15:10:06,683 INFO  L251      AbstractCegarLoop]: Starting to check reachability of 5 error locations.
[2020-09-24 15:10:06,719 INFO  L375      AbstractCegarLoop]: Interprodecural is true
[2020-09-24 15:10:06,719 INFO  L376      AbstractCegarLoop]: Hoare is true
[2020-09-24 15:10:06,719 INFO  L377      AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation
[2020-09-24 15:10:06,719 INFO  L378      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2020-09-24 15:10:06,719 INFO  L379      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2020-09-24 15:10:06,719 INFO  L380      AbstractCegarLoop]: Difference is false
[2020-09-24 15:10:06,720 INFO  L381      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2020-09-24 15:10:06,720 INFO  L385      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2020-09-24 15:10:06,765 INFO  L276                IsEmpty]: Start isEmpty. Operand 1127 states.
[2020-09-24 15:10:06,806 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 424
[2020-09-24 15:10:06,806 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-24 15:10:06,808 INFO  L422         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-24 15:10:06,809 INFO  L427      AbstractCegarLoop]: === Iteration 1 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 15:10:06,817 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 15:10:06,818 INFO  L82        PathProgramCache]: Analyzing trace with hash -219806221, now seen corresponding path program 1 times
[2020-09-24 15:10:06,829 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 15:10:06,830 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1214374144]
[2020-09-24 15:10:06,830 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 15:10:07,385 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 15:10:08,169 WARN  L193               SmtUtils]: Spent 304.00 ms on a formula simplification that was a NOOP. DAG size: 193
[2020-09-24 15:10:08,172 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-24 15:10:08,180 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 15:10:08,525 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-09-24 15:10:08,527 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1214374144]
[2020-09-24 15:10:08,530 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-09-24 15:10:08,531 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-09-24 15:10:08,532 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661267692]
[2020-09-24 15:10:08,545 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-09-24 15:10:08,545 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-24 15:10:08,569 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-09-24 15:10:08,570 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-09-24 15:10:08,573 INFO  L87              Difference]: Start difference. First operand 1127 states. Second operand 4 states.
[2020-09-24 15:10:13,095 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-24 15:10:13,095 INFO  L93              Difference]: Finished difference Result 1833 states and 2360 transitions.
[2020-09-24 15:10:13,096 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2020-09-24 15:10:13,098 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 423
[2020-09-24 15:10:13,101 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-24 15:10:13,131 INFO  L225             Difference]: With dead ends: 1833
[2020-09-24 15:10:13,131 INFO  L226             Difference]: Without dead ends: 1303
[2020-09-24 15:10:13,141 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
[2020-09-24 15:10:13,164 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 1303 states.
[2020-09-24 15:10:13,257 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 1303 to 1296.
[2020-09-24 15:10:13,259 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 1296 states.
[2020-09-24 15:10:13,265 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 1296 states to 1296 states and 1545 transitions.
[2020-09-24 15:10:13,267 INFO  L78                 Accepts]: Start accepts. Automaton has 1296 states and 1545 transitions. Word has length 423
[2020-09-24 15:10:13,269 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-09-24 15:10:13,269 INFO  L479      AbstractCegarLoop]: Abstraction has 1296 states and 1545 transitions.
[2020-09-24 15:10:13,270 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2020-09-24 15:10:13,270 INFO  L276                IsEmpty]: Start isEmpty. Operand 1296 states and 1545 transitions.
[2020-09-24 15:10:13,283 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 424
[2020-09-24 15:10:13,284 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-24 15:10:13,284 INFO  L422         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-24 15:10:13,285 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2020-09-24 15:10:13,285 INFO  L427      AbstractCegarLoop]: === Iteration 2 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 15:10:13,285 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 15:10:13,286 INFO  L82        PathProgramCache]: Analyzing trace with hash -74379501, now seen corresponding path program 1 times
[2020-09-24 15:10:13,286 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 15:10:13,286 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1324113815]
[2020-09-24 15:10:13,287 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 15:10:13,497 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 15:10:13,954 WARN  L193               SmtUtils]: Spent 264.00 ms on a formula simplification that was a NOOP. DAG size: 193
[2020-09-24 15:10:13,955 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-24 15:10:13,961 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 15:10:14,298 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-09-24 15:10:14,299 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1324113815]
[2020-09-24 15:10:14,299 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-09-24 15:10:14,299 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2020-09-24 15:10:14,300 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570148873]
[2020-09-24 15:10:14,302 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 5 states
[2020-09-24 15:10:14,303 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-24 15:10:14,303 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2020-09-24 15:10:14,303 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2020-09-24 15:10:14,303 INFO  L87              Difference]: Start difference. First operand 1296 states and 1545 transitions. Second operand 5 states.
[2020-09-24 15:10:20,436 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-24 15:10:20,437 INFO  L93              Difference]: Finished difference Result 3469 states and 4190 transitions.
[2020-09-24 15:10:20,437 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2020-09-24 15:10:20,438 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 423
[2020-09-24 15:10:20,439 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-24 15:10:20,451 INFO  L225             Difference]: With dead ends: 3469
[2020-09-24 15:10:20,451 INFO  L226             Difference]: Without dead ends: 2356
[2020-09-24 15:10:20,454 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30
[2020-09-24 15:10:20,459 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 2356 states.
[2020-09-24 15:10:20,522 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 2356 to 2234.
[2020-09-24 15:10:20,523 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 2234 states.
[2020-09-24 15:10:20,529 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 2234 states to 2234 states and 2699 transitions.
[2020-09-24 15:10:20,530 INFO  L78                 Accepts]: Start accepts. Automaton has 2234 states and 2699 transitions. Word has length 423
[2020-09-24 15:10:20,530 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-09-24 15:10:20,531 INFO  L479      AbstractCegarLoop]: Abstraction has 2234 states and 2699 transitions.
[2020-09-24 15:10:20,531 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2020-09-24 15:10:20,531 INFO  L276                IsEmpty]: Start isEmpty. Operand 2234 states and 2699 transitions.
[2020-09-24 15:10:20,540 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 425
[2020-09-24 15:10:20,540 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-24 15:10:20,541 INFO  L422         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-24 15:10:20,541 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2020-09-24 15:10:20,542 INFO  L427      AbstractCegarLoop]: === Iteration 3 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 15:10:20,542 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 15:10:20,542 INFO  L82        PathProgramCache]: Analyzing trace with hash -860561599, now seen corresponding path program 1 times
[2020-09-24 15:10:20,543 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 15:10:20,543 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2092933288]
[2020-09-24 15:10:20,543 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 15:10:20,619 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 15:10:20,934 WARN  L193               SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 193
[2020-09-24 15:10:20,935 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-24 15:10:20,940 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 15:10:21,128 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-09-24 15:10:21,129 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2092933288]
[2020-09-24 15:10:21,129 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-09-24 15:10:21,135 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-09-24 15:10:21,136 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173247751]
[2020-09-24 15:10:21,137 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-09-24 15:10:21,137 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-24 15:10:21,137 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-09-24 15:10:21,137 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-09-24 15:10:21,138 INFO  L87              Difference]: Start difference. First operand 2234 states and 2699 transitions. Second operand 4 states.
[2020-09-24 15:10:27,320 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-24 15:10:27,320 INFO  L93              Difference]: Finished difference Result 6299 states and 7670 transitions.
[2020-09-24 15:10:27,321 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2020-09-24 15:10:27,321 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 424
[2020-09-24 15:10:27,322 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-24 15:10:27,340 INFO  L225             Difference]: With dead ends: 6299
[2020-09-24 15:10:27,341 INFO  L226             Difference]: Without dead ends: 4282
[2020-09-24 15:10:27,346 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-09-24 15:10:27,351 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 4282 states.
[2020-09-24 15:10:27,432 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 4282 to 2236.
[2020-09-24 15:10:27,432 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 2236 states.
[2020-09-24 15:10:27,438 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 2236 states to 2236 states and 2701 transitions.
[2020-09-24 15:10:27,439 INFO  L78                 Accepts]: Start accepts. Automaton has 2236 states and 2701 transitions. Word has length 424
[2020-09-24 15:10:27,439 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-09-24 15:10:27,439 INFO  L479      AbstractCegarLoop]: Abstraction has 2236 states and 2701 transitions.
[2020-09-24 15:10:27,439 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2020-09-24 15:10:27,440 INFO  L276                IsEmpty]: Start isEmpty. Operand 2236 states and 2701 transitions.
[2020-09-24 15:10:27,448 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 426
[2020-09-24 15:10:27,448 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-24 15:10:27,449 INFO  L422         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-24 15:10:27,449 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2020-09-24 15:10:27,450 INFO  L427      AbstractCegarLoop]: === Iteration 4 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 15:10:27,450 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 15:10:27,450 INFO  L82        PathProgramCache]: Analyzing trace with hash -1010739082, now seen corresponding path program 1 times
[2020-09-24 15:10:27,450 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 15:10:27,452 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2107504287]
[2020-09-24 15:10:27,452 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 15:10:27,524 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 15:10:27,977 WARN  L193               SmtUtils]: Spent 305.00 ms on a formula simplification that was a NOOP. DAG size: 193
[2020-09-24 15:10:27,979 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-24 15:10:27,987 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 15:10:28,222 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-09-24 15:10:28,223 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2107504287]
[2020-09-24 15:10:28,223 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-09-24 15:10:28,223 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-09-24 15:10:28,223 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471446616]
[2020-09-24 15:10:28,225 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-09-24 15:10:28,225 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-24 15:10:28,225 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-09-24 15:10:28,226 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-09-24 15:10:28,227 INFO  L87              Difference]: Start difference. First operand 2236 states and 2701 transitions. Second operand 4 states.
[2020-09-24 15:10:34,110 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-24 15:10:34,110 INFO  L93              Difference]: Finished difference Result 5992 states and 7288 transitions.
[2020-09-24 15:10:34,111 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2020-09-24 15:10:34,111 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 425
[2020-09-24 15:10:34,112 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-24 15:10:34,136 INFO  L225             Difference]: With dead ends: 5992
[2020-09-24 15:10:34,136 INFO  L226             Difference]: Without dead ends: 4182
[2020-09-24 15:10:34,141 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
[2020-09-24 15:10:34,153 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 4182 states.
[2020-09-24 15:10:34,276 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 4182 to 4060.
[2020-09-24 15:10:34,277 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 4060 states.
[2020-09-24 15:10:34,290 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 4060 states to 4060 states and 4932 transitions.
[2020-09-24 15:10:34,290 INFO  L78                 Accepts]: Start accepts. Automaton has 4060 states and 4932 transitions. Word has length 425
[2020-09-24 15:10:34,291 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-09-24 15:10:34,291 INFO  L479      AbstractCegarLoop]: Abstraction has 4060 states and 4932 transitions.
[2020-09-24 15:10:34,291 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2020-09-24 15:10:34,291 INFO  L276                IsEmpty]: Start isEmpty. Operand 4060 states and 4932 transitions.
[2020-09-24 15:10:34,299 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 426
[2020-09-24 15:10:34,300 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-24 15:10:34,300 INFO  L422         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-24 15:10:34,300 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3
[2020-09-24 15:10:34,301 INFO  L427      AbstractCegarLoop]: === Iteration 5 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 15:10:34,301 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 15:10:34,301 INFO  L82        PathProgramCache]: Analyzing trace with hash 398825718, now seen corresponding path program 1 times
[2020-09-24 15:10:34,302 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 15:10:34,302 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1391806794]
[2020-09-24 15:10:34,302 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 15:10:34,451 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 15:10:34,816 WARN  L193               SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 193
[2020-09-24 15:10:34,817 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-24 15:10:34,822 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 15:10:35,027 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-09-24 15:10:35,027 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1391806794]
[2020-09-24 15:10:35,028 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-09-24 15:10:35,028 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2020-09-24 15:10:35,028 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878542842]
[2020-09-24 15:10:35,030 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 5 states
[2020-09-24 15:10:35,030 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-24 15:10:35,031 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2020-09-24 15:10:35,031 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2020-09-24 15:10:35,031 INFO  L87              Difference]: Start difference. First operand 4060 states and 4932 transitions. Second operand 5 states.
[2020-09-24 15:10:40,911 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-24 15:10:40,912 INFO  L93              Difference]: Finished difference Result 11306 states and 13778 transitions.
[2020-09-24 15:10:40,917 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2020-09-24 15:10:40,917 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 425
[2020-09-24 15:10:40,918 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-24 15:10:40,961 INFO  L225             Difference]: With dead ends: 11306
[2020-09-24 15:10:40,961 INFO  L226             Difference]: Without dead ends: 7434
[2020-09-24 15:10:40,969 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30
[2020-09-24 15:10:40,977 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 7434 states.
[2020-09-24 15:10:41,185 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 7434 to 7321.
[2020-09-24 15:10:41,185 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 7321 states.
[2020-09-24 15:10:41,197 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 7321 states to 7321 states and 8875 transitions.
[2020-09-24 15:10:41,197 INFO  L78                 Accepts]: Start accepts. Automaton has 7321 states and 8875 transitions. Word has length 425
[2020-09-24 15:10:41,198 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-09-24 15:10:41,198 INFO  L479      AbstractCegarLoop]: Abstraction has 7321 states and 8875 transitions.
[2020-09-24 15:10:41,198 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2020-09-24 15:10:41,199 INFO  L276                IsEmpty]: Start isEmpty. Operand 7321 states and 8875 transitions.
[2020-09-24 15:10:41,215 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 426
[2020-09-24 15:10:41,216 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-24 15:10:41,216 INFO  L422         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-24 15:10:41,216 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4
[2020-09-24 15:10:41,217 INFO  L427      AbstractCegarLoop]: === Iteration 6 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 15:10:41,217 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 15:10:41,217 INFO  L82        PathProgramCache]: Analyzing trace with hash 481574245, now seen corresponding path program 1 times
[2020-09-24 15:10:41,217 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 15:10:41,218 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1721799996]
[2020-09-24 15:10:41,218 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 15:10:41,334 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 15:10:41,726 WARN  L193               SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 193
[2020-09-24 15:10:41,730 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-24 15:10:41,738 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 15:10:41,954 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-09-24 15:10:41,955 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1721799996]
[2020-09-24 15:10:41,955 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-09-24 15:10:41,955 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2020-09-24 15:10:41,955 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606436634]
[2020-09-24 15:10:41,956 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 5 states
[2020-09-24 15:10:41,956 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-24 15:10:41,957 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2020-09-24 15:10:41,957 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2020-09-24 15:10:41,957 INFO  L87              Difference]: Start difference. First operand 7321 states and 8875 transitions. Second operand 5 states.
[2020-09-24 15:10:47,417 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-24 15:10:47,417 INFO  L93              Difference]: Finished difference Result 21038 states and 25512 transitions.
[2020-09-24 15:10:47,418 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2020-09-24 15:10:47,418 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 425
[2020-09-24 15:10:47,418 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-24 15:10:47,460 INFO  L225             Difference]: With dead ends: 21038
[2020-09-24 15:10:47,460 INFO  L226             Difference]: Without dead ends: 13980
[2020-09-24 15:10:47,475 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30
[2020-09-24 15:10:47,490 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 13980 states.
[2020-09-24 15:10:47,801 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 13980 to 13853.
[2020-09-24 15:10:47,801 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 13853 states.
[2020-09-24 15:10:47,815 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13853 states to 13853 states and 16718 transitions.
[2020-09-24 15:10:47,815 INFO  L78                 Accepts]: Start accepts. Automaton has 13853 states and 16718 transitions. Word has length 425
[2020-09-24 15:10:47,816 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-09-24 15:10:47,816 INFO  L479      AbstractCegarLoop]: Abstraction has 13853 states and 16718 transitions.
[2020-09-24 15:10:47,816 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2020-09-24 15:10:47,816 INFO  L276                IsEmpty]: Start isEmpty. Operand 13853 states and 16718 transitions.
[2020-09-24 15:10:47,837 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 427
[2020-09-24 15:10:47,837 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-24 15:10:47,838 INFO  L422         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-24 15:10:47,838 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5
[2020-09-24 15:10:47,838 INFO  L427      AbstractCegarLoop]: === Iteration 7 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 15:10:47,838 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 15:10:47,839 INFO  L82        PathProgramCache]: Analyzing trace with hash -2068542717, now seen corresponding path program 1 times
[2020-09-24 15:10:47,839 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 15:10:47,839 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [932957913]
[2020-09-24 15:10:47,839 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 15:10:47,891 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 15:10:48,287 WARN  L193               SmtUtils]: Spent 297.00 ms on a formula simplification that was a NOOP. DAG size: 193
[2020-09-24 15:10:48,289 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-24 15:10:48,293 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 15:10:48,424 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-09-24 15:10:48,425 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [932957913]
[2020-09-24 15:10:48,426 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-09-24 15:10:48,426 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-09-24 15:10:48,427 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315442939]
[2020-09-24 15:10:48,428 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-09-24 15:10:48,429 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-24 15:10:48,429 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-09-24 15:10:48,430 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-09-24 15:10:48,430 INFO  L87              Difference]: Start difference. First operand 13853 states and 16718 transitions. Second operand 4 states.
[2020-09-24 15:10:54,862 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-24 15:10:54,863 INFO  L93              Difference]: Finished difference Result 40968 states and 49482 transitions.
[2020-09-24 15:10:54,863 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2020-09-24 15:10:54,864 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 426
[2020-09-24 15:10:54,864 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-24 15:10:54,916 INFO  L225             Difference]: With dead ends: 40968
[2020-09-24 15:10:54,916 INFO  L226             Difference]: Without dead ends: 27428
[2020-09-24 15:10:54,942 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
[2020-09-24 15:10:54,969 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 27428 states.
[2020-09-24 15:10:55,570 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 27428 to 13863.
[2020-09-24 15:10:55,570 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 13863 states.
[2020-09-24 15:10:55,589 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13863 states to 13863 states and 16728 transitions.
[2020-09-24 15:10:55,589 INFO  L78                 Accepts]: Start accepts. Automaton has 13863 states and 16728 transitions. Word has length 426
[2020-09-24 15:10:55,590 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-09-24 15:10:55,590 INFO  L479      AbstractCegarLoop]: Abstraction has 13863 states and 16728 transitions.
[2020-09-24 15:10:55,590 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2020-09-24 15:10:55,590 INFO  L276                IsEmpty]: Start isEmpty. Operand 13863 states and 16728 transitions.
[2020-09-24 15:10:55,611 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 428
[2020-09-24 15:10:55,611 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-24 15:10:55,612 INFO  L422         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-24 15:10:55,612 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6
[2020-09-24 15:10:55,612 INFO  L427      AbstractCegarLoop]: === Iteration 8 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 15:10:55,612 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 15:10:55,612 INFO  L82        PathProgramCache]: Analyzing trace with hash 148387208, now seen corresponding path program 1 times
[2020-09-24 15:10:55,613 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 15:10:55,613 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [439183747]
[2020-09-24 15:10:55,613 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 15:10:55,674 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 15:10:56,030 WARN  L193               SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 193
[2020-09-24 15:10:56,031 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-24 15:10:56,037 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 15:10:56,274 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-09-24 15:10:56,275 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [439183747]
[2020-09-24 15:10:56,275 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-09-24 15:10:56,275 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-09-24 15:10:56,276 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797859727]
[2020-09-24 15:10:56,277 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-09-24 15:10:56,278 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-24 15:10:56,278 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-09-24 15:10:56,279 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-09-24 15:10:56,279 INFO  L87              Difference]: Start difference. First operand 13863 states and 16728 transitions. Second operand 4 states.