/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration false -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c


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


This is Ultimate 0.1.25-c90d42b
[2020-09-24 15:11:02,799 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2020-09-24 15:11:02,803 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2020-09-24 15:11:02,829 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2020-09-24 15:11:02,829 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2020-09-24 15:11:02,831 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2020-09-24 15:11:02,832 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2020-09-24 15:11:02,834 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
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[2020-09-24 15:11:02,839 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2020-09-24 15:11:02,841 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2020-09-24 15:11:02,842 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2020-09-24 15:11:02,843 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2020-09-24 15:11:02,844 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2020-09-24 15:11:02,845 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2020-09-24 15:11:02,847 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2020-09-24 15:11:02,849 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2020-09-24 15:11:02,851 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2020-09-24 15:11:02,852 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2020-09-24 15:11:02,853 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2020-09-24 15:11:02,854 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2020-09-24 15:11:02,858 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2020-09-24 15:11:02,858 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2020-09-24 15:11:02,859 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2020-09-24 15:11:02,860 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2020-09-24 15:11:02,860 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2020-09-24 15:11:02,861 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2020-09-24 15:11:02,861 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2020-09-24 15:11:02,863 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2020-09-24 15:11:02,864 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2020-09-24 15:11:02,865 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2020-09-24 15:11:02,866 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2020-09-24 15:11:02,866 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
[2020-09-24 15:11:02,867 INFO  L184        SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
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[2020-09-24 15:11:02,867 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
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[2020-09-24 15:11:02,869 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2020-09-24 15:11:02,870 INFO  L101        SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf
[2020-09-24 15:11:02,901 INFO  L113        SettingsManager]: Loading preferences was successful
[2020-09-24 15:11:02,902 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2020-09-24 15:11:02,903 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2020-09-24 15:11:02,903 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2020-09-24 15:11:02,904 INFO  L138        SettingsManager]:  * Use SBE=true
[2020-09-24 15:11:02,904 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2020-09-24 15:11:02,904 INFO  L138        SettingsManager]:  * sizeof long=4
[2020-09-24 15:11:02,904 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2020-09-24 15:11:02,904 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2020-09-24 15:11:02,905 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2020-09-24 15:11:02,905 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2020-09-24 15:11:02,905 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2020-09-24 15:11:02,905 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2020-09-24 15:11:02,906 INFO  L138        SettingsManager]:  * sizeof long double=12
[2020-09-24 15:11:02,906 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2020-09-24 15:11:02,906 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2020-09-24 15:11:02,906 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2020-09-24 15:11:02,906 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2020-09-24 15:11:02,907 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2020-09-24 15:11:02,907 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2020-09-24 15:11:02,907 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2020-09-24 15:11:02,907 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-09-24 15:11:02,907 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2020-09-24 15:11:02,908 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2020-09-24 15:11:02,908 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2020-09-24 15:11:02,908 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2020-09-24 15:11:02,908 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-09-24 15:11:02,908 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2020-09-24 15:11:02,909 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2020-09-24 15:11:02,909 INFO  L138        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SingleStatement
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> false
[2020-09-24 15:11:03,424 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2020-09-24 15:11:03,452 INFO  L258   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2020-09-24 15:11:03,458 INFO  L214   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2020-09-24 15:11:03,462 INFO  L271        PluginConnector]: Initializing CDTParser...
[2020-09-24 15:11:03,462 INFO  L275        PluginConnector]: CDTParser initialized
[2020-09-24 15:11:03,465 INFO  L429   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c
[2020-09-24 15:11:03,549 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1ee168c82/6c2ba965bb1f4536a64d1c8bce1eff64/FLAG7ac9b628b
[2020-09-24 15:11:04,319 INFO  L306              CDTParser]: Found 1 translation units.
[2020-09-24 15:11:04,320 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c
[2020-09-24 15:11:04,340 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1ee168c82/6c2ba965bb1f4536a64d1c8bce1eff64/FLAG7ac9b628b
[2020-09-24 15:11:04,412 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1ee168c82/6c2ba965bb1f4536a64d1c8bce1eff64
[2020-09-24 15:11:04,427 INFO  L296   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2020-09-24 15:11:04,433 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2020-09-24 15:11:04,434 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2020-09-24 15:11:04,434 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2020-09-24 15:11:04,439 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2020-09-24 15:11:04,440 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 03:11:04" (1/1) ...
[2020-09-24 15:11:04,445 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@779392b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:11:04, skipping insertion in model container
[2020-09-24 15:11:04,445 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 03:11:04" (1/1) ...
[2020-09-24 15:11:04,454 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2020-09-24 15:11:04,572 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2020-09-24 15:11:05,779 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-09-24 15:11:05,796 INFO  L203         MainTranslator]: Completed pre-run
[2020-09-24 15:11:06,286 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-09-24 15:11:06,328 INFO  L208         MainTranslator]: Completed translation
[2020-09-24 15:11:06,330 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:11:06 WrapperNode
[2020-09-24 15:11:06,330 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2020-09-24 15:11:06,331 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2020-09-24 15:11:06,332 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2020-09-24 15:11:06,332 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2020-09-24 15:11:06,356 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:11:06" (1/1) ...
[2020-09-24 15:11:06,357 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:11:06" (1/1) ...
[2020-09-24 15:11:06,387 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:11:06" (1/1) ...
[2020-09-24 15:11:06,387 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:11:06" (1/1) ...
[2020-09-24 15:11:06,442 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:11:06" (1/1) ...
[2020-09-24 15:11:06,505 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:11:06" (1/1) ...
[2020-09-24 15:11:06,524 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:11:06" (1/1) ...
[2020-09-24 15:11:06,559 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2020-09-24 15:11:06,565 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2020-09-24 15:11:06,565 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2020-09-24 15:11:06,565 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2020-09-24 15:11:06,567 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:11:06" (1/1) ...
No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-09-24 15:11:06,694 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2020-09-24 15:11:06,695 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2020-09-24 15:11:06,695 INFO  L138     BoogieDeclarations]: Found implementation of procedure assume_abort_if_not
[2020-09-24 15:11:06,695 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2020-09-24 15:11:06,696 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2020-09-24 15:11:06,697 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char
[2020-09-24 15:11:06,698 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool
[2020-09-24 15:11:06,699 INFO  L130     BoogieDeclarations]: Found specification of procedure assert
[2020-09-24 15:11:06,700 INFO  L130     BoogieDeclarations]: Found specification of procedure abort
[2020-09-24 15:11:06,700 INFO  L130     BoogieDeclarations]: Found specification of procedure assume_abort_if_not
[2020-09-24 15:11:06,701 INFO  L130     BoogieDeclarations]: Found specification of procedure read
[2020-09-24 15:11:06,702 INFO  L130     BoogieDeclarations]: Found specification of procedure write
[2020-09-24 15:11:06,702 INFO  L130     BoogieDeclarations]: Found specification of procedure node1
[2020-09-24 15:11:06,702 INFO  L130     BoogieDeclarations]: Found specification of procedure node2
[2020-09-24 15:11:06,703 INFO  L130     BoogieDeclarations]: Found specification of procedure node3
[2020-09-24 15:11:06,704 INFO  L130     BoogieDeclarations]: Found specification of procedure node4
[2020-09-24 15:11:06,704 INFO  L130     BoogieDeclarations]: Found specification of procedure init
[2020-09-24 15:11:06,705 INFO  L130     BoogieDeclarations]: Found specification of procedure check
[2020-09-24 15:11:06,705 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2020-09-24 15:11:06,705 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2020-09-24 15:11:06,706 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2020-09-24 15:11:10,380 INFO  L290             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2020-09-24 15:11:10,381 INFO  L295             CfgBuilder]: Removed 0 assume(true) statements.
[2020-09-24 15:11:10,397 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 03:11:10 BoogieIcfgContainer
[2020-09-24 15:11:10,397 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2020-09-24 15:11:10,398 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2020-09-24 15:11:10,398 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2020-09-24 15:11:10,403 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2020-09-24 15:11:10,403 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 03:11:04" (1/3) ...
[2020-09-24 15:11:10,404 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@135ef62a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 03:11:10, skipping insertion in model container
[2020-09-24 15:11:10,404 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:11:06" (2/3) ...
[2020-09-24 15:11:10,404 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@135ef62a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 03:11:10, skipping insertion in model container
[2020-09-24 15:11:10,405 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 03:11:10" (3/3) ...
[2020-09-24 15:11:10,407 INFO  L109   eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.3.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c
[2020-09-24 15:11:10,419 INFO  L157   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION
[2020-09-24 15:11:10,431 INFO  L169   ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2020-09-24 15:11:10,454 INFO  L251      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2020-09-24 15:11:10,493 INFO  L375      AbstractCegarLoop]: Interprodecural is true
[2020-09-24 15:11:10,493 INFO  L376      AbstractCegarLoop]: Hoare is true
[2020-09-24 15:11:10,493 INFO  L377      AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation
[2020-09-24 15:11:10,493 INFO  L378      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2020-09-24 15:11:10,494 INFO  L379      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2020-09-24 15:11:10,494 INFO  L380      AbstractCegarLoop]: Difference is false
[2020-09-24 15:11:10,494 INFO  L381      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2020-09-24 15:11:10,494 INFO  L385      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2020-09-24 15:11:10,542 INFO  L276                IsEmpty]: Start isEmpty. Operand 2022 states.
[2020-09-24 15:11:10,649 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 933
[2020-09-24 15:11:10,649 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-24 15:11:10,652 INFO  L422         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-24 15:11:10,653 INFO  L427      AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 15:11:10,660 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 15:11:10,661 INFO  L82        PathProgramCache]: Analyzing trace with hash -272093385, now seen corresponding path program 1 times
[2020-09-24 15:11:10,673 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 15:11:10,673 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1948471827]
[2020-09-24 15:11:10,674 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 15:11:11,817 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 15:11:13,464 WARN  L193               SmtUtils]: Spent 599.00 ms on a formula simplification that was a NOOP. DAG size: 283
[2020-09-24 15:11:13,467 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-24 15:11:13,476 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 15:11:15,469 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-09-24 15:11:15,471 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1948471827]
[2020-09-24 15:11:15,474 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-09-24 15:11:15,474 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-09-24 15:11:15,476 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74626842]
[2020-09-24 15:11:15,487 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-09-24 15:11:15,487 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-24 15:11:15,509 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-09-24 15:11:15,510 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-09-24 15:11:15,513 INFO  L87              Difference]: Start difference. First operand 2022 states. Second operand 4 states.
[2020-09-24 15:11:25,494 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-24 15:11:25,494 INFO  L93              Difference]: Finished difference Result 3529 states and 4643 transitions.
[2020-09-24 15:11:25,495 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2020-09-24 15:11:25,497 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 932
[2020-09-24 15:11:25,503 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-24 15:11:25,551 INFO  L225             Difference]: With dead ends: 3529
[2020-09-24 15:11:25,551 INFO  L226             Difference]: Without dead ends: 2855
[2020-09-24 15:11:25,561 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-09-24 15:11:25,593 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 2855 states.
[2020-09-24 15:11:25,717 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 2855 to 2842.
[2020-09-24 15:11:25,719 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 2842 states.
[2020-09-24 15:11:25,737 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 2842 states to 2842 states and 3559 transitions.
[2020-09-24 15:11:25,740 INFO  L78                 Accepts]: Start accepts. Automaton has 2842 states and 3559 transitions. Word has length 932
[2020-09-24 15:11:25,744 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-09-24 15:11:25,745 INFO  L479      AbstractCegarLoop]: Abstraction has 2842 states and 3559 transitions.
[2020-09-24 15:11:25,745 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2020-09-24 15:11:25,745 INFO  L276                IsEmpty]: Start isEmpty. Operand 2842 states and 3559 transitions.
[2020-09-24 15:11:25,870 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 933
[2020-09-24 15:11:25,871 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-24 15:11:25,872 INFO  L422         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-24 15:11:25,872 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2020-09-24 15:11:25,873 INFO  L427      AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 15:11:25,873 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 15:11:25,875 INFO  L82        PathProgramCache]: Analyzing trace with hash 1335477111, now seen corresponding path program 1 times
[2020-09-24 15:11:25,875 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 15:11:25,875 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [693505040]
[2020-09-24 15:11:25,876 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 15:11:26,531 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 15:11:27,672 WARN  L193               SmtUtils]: Spent 618.00 ms on a formula simplification that was a NOOP. DAG size: 283
[2020-09-24 15:11:27,674 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-24 15:11:27,682 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 15:11:28,335 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-09-24 15:11:28,335 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [693505040]
[2020-09-24 15:11:28,336 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-09-24 15:11:28,336 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2020-09-24 15:11:28,336 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749588356]
[2020-09-24 15:11:28,339 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 5 states
[2020-09-24 15:11:28,340 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-24 15:11:28,340 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2020-09-24 15:11:28,340 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2020-09-24 15:11:28,340 INFO  L87              Difference]: Start difference. First operand 2842 states and 3559 transitions. Second operand 5 states.
[2020-09-24 15:11:41,567 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-24 15:11:41,568 INFO  L93              Difference]: Finished difference Result 7834 states and 9940 transitions.
[2020-09-24 15:11:41,568 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2020-09-24 15:11:41,569 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 932
[2020-09-24 15:11:41,571 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-24 15:11:41,596 INFO  L225             Difference]: With dead ends: 7834
[2020-09-24 15:11:41,596 INFO  L226             Difference]: Without dead ends: 5296
[2020-09-24 15:11:41,602 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30
[2020-09-24 15:11:41,609 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 5296 states.
[2020-09-24 15:11:41,738 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 5296 to 5294.
[2020-09-24 15:11:41,738 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 5294 states.
[2020-09-24 15:11:41,751 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5294 states to 5294 states and 6672 transitions.
[2020-09-24 15:11:41,751 INFO  L78                 Accepts]: Start accepts. Automaton has 5294 states and 6672 transitions. Word has length 932
[2020-09-24 15:11:41,752 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-09-24 15:11:41,752 INFO  L479      AbstractCegarLoop]: Abstraction has 5294 states and 6672 transitions.
[2020-09-24 15:11:41,753 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2020-09-24 15:11:41,753 INFO  L276                IsEmpty]: Start isEmpty. Operand 5294 states and 6672 transitions.
[2020-09-24 15:11:41,771 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 935
[2020-09-24 15:11:41,772 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-24 15:11:41,773 INFO  L422         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-24 15:11:41,773 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2020-09-24 15:11:41,773 INFO  L427      AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 15:11:41,774 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 15:11:41,774 INFO  L82        PathProgramCache]: Analyzing trace with hash 628389466, now seen corresponding path program 1 times
[2020-09-24 15:11:41,775 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 15:11:41,775 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1125861367]
[2020-09-24 15:11:41,775 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 15:11:42,005 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 15:11:43,006 WARN  L193               SmtUtils]: Spent 639.00 ms on a formula simplification that was a NOOP. DAG size: 283
[2020-09-24 15:11:43,007 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-24 15:11:43,014 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 15:11:43,915 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-09-24 15:11:43,916 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1125861367]
[2020-09-24 15:11:43,916 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-09-24 15:11:43,917 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-09-24 15:11:43,920 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038191314]
[2020-09-24 15:11:43,921 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-09-24 15:11:43,921 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-24 15:11:43,922 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-09-24 15:11:43,922 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-09-24 15:11:43,922 INFO  L87              Difference]: Start difference. First operand 5294 states and 6672 transitions. Second operand 4 states.
[2020-09-24 15:11:59,592 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-24 15:11:59,593 INFO  L93              Difference]: Finished difference Result 14897 states and 18867 transitions.
[2020-09-24 15:11:59,594 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2020-09-24 15:11:59,594 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 934
[2020-09-24 15:11:59,596 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-24 15:11:59,638 INFO  L225             Difference]: With dead ends: 14897
[2020-09-24 15:11:59,638 INFO  L226             Difference]: Without dead ends: 10113
[2020-09-24 15:11:59,647 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-09-24 15:11:59,660 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 10113 states.
[2020-09-24 15:11:59,894 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 10113 to 10111.
[2020-09-24 15:11:59,894 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 10111 states.
[2020-09-24 15:11:59,910 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 10111 states to 10111 states and 12768 transitions.
[2020-09-24 15:11:59,910 INFO  L78                 Accepts]: Start accepts. Automaton has 10111 states and 12768 transitions. Word has length 934
[2020-09-24 15:11:59,911 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-09-24 15:11:59,912 INFO  L479      AbstractCegarLoop]: Abstraction has 10111 states and 12768 transitions.
[2020-09-24 15:11:59,912 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2020-09-24 15:11:59,912 INFO  L276                IsEmpty]: Start isEmpty. Operand 10111 states and 12768 transitions.
[2020-09-24 15:11:59,938 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 935
[2020-09-24 15:11:59,939 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-24 15:11:59,940 INFO  L422         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-24 15:11:59,940 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2020-09-24 15:11:59,940 INFO  L427      AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 15:11:59,940 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 15:11:59,941 INFO  L82        PathProgramCache]: Analyzing trace with hash 1532255505, now seen corresponding path program 1 times
[2020-09-24 15:11:59,941 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 15:11:59,942 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [239584817]
[2020-09-24 15:11:59,943 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 15:12:00,076 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 15:12:00,960 WARN  L193               SmtUtils]: Spent 651.00 ms on a formula simplification that was a NOOP. DAG size: 283
[2020-09-24 15:12:00,961 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-24 15:12:00,969 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 15:12:01,409 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-09-24 15:12:01,409 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [239584817]
[2020-09-24 15:12:01,409 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-09-24 15:12:01,409 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-09-24 15:12:01,410 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156313301]
[2020-09-24 15:12:01,411 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-09-24 15:12:01,411 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-24 15:12:01,411 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-09-24 15:12:01,411 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-09-24 15:12:01,411 INFO  L87              Difference]: Start difference. First operand 10111 states and 12768 transitions. Second operand 4 states.