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


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


This is Ultimate 0.1.25-177f698
[2020-08-21 13:29:20,283 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2020-08-21 13:29:20,285 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2020-08-21 13:29:20,308 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2020-08-21 13:29:20,309 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2020-08-21 13:29:20,310 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2020-08-21 13:29:20,311 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
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[2020-08-21 13:29:20,317 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2020-08-21 13:29:20,318 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
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[2020-08-21 13:29:20,320 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2020-08-21 13:29:20,321 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2020-08-21 13:29:20,322 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2020-08-21 13:29:20,324 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2020-08-21 13:29:20,326 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2020-08-21 13:29:20,327 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2020-08-21 13:29:20,329 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2020-08-21 13:29:20,330 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2020-08-21 13:29:20,330 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2020-08-21 13:29:20,333 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
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[2020-08-21 13:29:20,334 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2020-08-21 13:29:20,335 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2020-08-21 13:29:20,335 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
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[2020-08-21 13:29:20,336 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
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[2020-08-21 13:29:20,340 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
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[2020-08-21 13:29:20,343 INFO  L101        SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf
[2020-08-21 13:29:20,370 INFO  L113        SettingsManager]: Loading preferences was successful
[2020-08-21 13:29:20,370 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2020-08-21 13:29:20,371 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2020-08-21 13:29:20,373 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2020-08-21 13:29:20,374 INFO  L138        SettingsManager]:  * Use SBE=true
[2020-08-21 13:29:20,374 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2020-08-21 13:29:20,374 INFO  L138        SettingsManager]:  * sizeof long=4
[2020-08-21 13:29:20,374 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2020-08-21 13:29:20,374 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2020-08-21 13:29:20,375 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2020-08-21 13:29:20,375 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2020-08-21 13:29:20,376 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2020-08-21 13:29:20,376 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2020-08-21 13:29:20,376 INFO  L138        SettingsManager]:  * sizeof long double=12
[2020-08-21 13:29:20,376 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2020-08-21 13:29:20,377 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2020-08-21 13:29:20,377 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2020-08-21 13:29:20,377 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2020-08-21 13:29:20,377 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2020-08-21 13:29:20,377 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2020-08-21 13:29:20,378 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2020-08-21 13:29:20,378 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-08-21 13:29:20,379 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2020-08-21 13:29:20,379 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2020-08-21 13:29:20,379 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2020-08-21 13:29:20,379 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2020-08-21 13:29:20,380 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-08-21 13:29:20,380 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2020-08-21 13:29:20,380 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2020-08-21 13:29:20,380 INFO  L138        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> false
[2020-08-21 13:29:20,657 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2020-08-21 13:29:20,669 INFO  L258   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2020-08-21 13:29:20,672 INFO  L214   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2020-08-21 13:29:20,674 INFO  L271        PluginConnector]: Initializing CDTParser...
[2020-08-21 13:29:20,674 INFO  L275        PluginConnector]: CDTParser initialized
[2020-08-21 13:29:20,675 INFO  L429   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c
[2020-08-21 13:29:20,737 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d2f082749/0f3fe93c306a41a59bce7c77d66d6b9d/FLAG87491ed21
[2020-08-21 13:29:21,393 INFO  L306              CDTParser]: Found 1 translation units.
[2020-08-21 13:29:21,394 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c
[2020-08-21 13:29:21,416 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d2f082749/0f3fe93c306a41a59bce7c77d66d6b9d/FLAG87491ed21
[2020-08-21 13:29:21,563 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d2f082749/0f3fe93c306a41a59bce7c77d66d6b9d
[2020-08-21 13:29:21,571 INFO  L296   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2020-08-21 13:29:21,573 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2020-08-21 13:29:21,574 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2020-08-21 13:29:21,574 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2020-08-21 13:29:21,578 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2020-08-21 13:29:21,579 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 01:29:21" (1/1) ...
[2020-08-21 13:29:21,582 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@59f61d05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:29:21, skipping insertion in model container
[2020-08-21 13:29:21,582 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 01:29:21" (1/1) ...
[2020-08-21 13:29:21,590 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2020-08-21 13:29:21,698 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2020-08-21 13:29:22,614 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-08-21 13:29:22,627 INFO  L203         MainTranslator]: Completed pre-run
[2020-08-21 13:29:23,330 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-08-21 13:29:23,352 INFO  L208         MainTranslator]: Completed translation
[2020-08-21 13:29:23,352 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:29:23 WrapperNode
[2020-08-21 13:29:23,352 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2020-08-21 13:29:23,353 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2020-08-21 13:29:23,353 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2020-08-21 13:29:23,354 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2020-08-21 13:29:23,369 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:29:23" (1/1) ...
[2020-08-21 13:29:23,369 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:29:23" (1/1) ...
[2020-08-21 13:29:23,417 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:29:23" (1/1) ...
[2020-08-21 13:29:23,423 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:29:23" (1/1) ...
[2020-08-21 13:29:23,495 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:29:23" (1/1) ...
[2020-08-21 13:29:23,535 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:29:23" (1/1) ...
[2020-08-21 13:29:23,550 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:29:23" (1/1) ...
[2020-08-21 13:29:23,573 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2020-08-21 13:29:23,574 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2020-08-21 13:29:23,574 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2020-08-21 13:29:23,574 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2020-08-21 13:29:23,575 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:29:23" (1/1) ...
No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-08-21 13:29:23,653 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2020-08-21 13:29:23,653 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2020-08-21 13:29:23,653 INFO  L138     BoogieDeclarations]: Found implementation of procedure assume_abort_if_not
[2020-08-21 13:29:23,654 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2020-08-21 13:29:23,654 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2020-08-21 13:29:23,654 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char
[2020-08-21 13:29:23,654 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool
[2020-08-21 13:29:23,654 INFO  L130     BoogieDeclarations]: Found specification of procedure assert
[2020-08-21 13:29:23,655 INFO  L130     BoogieDeclarations]: Found specification of procedure abort
[2020-08-21 13:29:23,655 INFO  L130     BoogieDeclarations]: Found specification of procedure assume_abort_if_not
[2020-08-21 13:29:23,655 INFO  L130     BoogieDeclarations]: Found specification of procedure read
[2020-08-21 13:29:23,655 INFO  L130     BoogieDeclarations]: Found specification of procedure write
[2020-08-21 13:29:23,655 INFO  L130     BoogieDeclarations]: Found specification of procedure node1
[2020-08-21 13:29:23,656 INFO  L130     BoogieDeclarations]: Found specification of procedure node2
[2020-08-21 13:29:23,656 INFO  L130     BoogieDeclarations]: Found specification of procedure node3
[2020-08-21 13:29:23,656 INFO  L130     BoogieDeclarations]: Found specification of procedure node4
[2020-08-21 13:29:23,656 INFO  L130     BoogieDeclarations]: Found specification of procedure init
[2020-08-21 13:29:23,656 INFO  L130     BoogieDeclarations]: Found specification of procedure check
[2020-08-21 13:29:23,657 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2020-08-21 13:29:23,657 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2020-08-21 13:29:23,657 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2020-08-21 13:29:26,195 INFO  L290             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2020-08-21 13:29:26,196 INFO  L295             CfgBuilder]: Removed 0 assume(true) statements.
[2020-08-21 13:29:26,210 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 01:29:26 BoogieIcfgContainer
[2020-08-21 13:29:26,210 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2020-08-21 13:29:26,212 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2020-08-21 13:29:26,212 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2020-08-21 13:29:26,221 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2020-08-21 13:29:26,221 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 01:29:21" (1/3) ...
[2020-08-21 13:29:26,222 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7549279a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 01:29:26, skipping insertion in model container
[2020-08-21 13:29:26,222 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:29:23" (2/3) ...
[2020-08-21 13:29:26,223 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7549279a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 01:29:26, skipping insertion in model container
[2020-08-21 13:29:26,223 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 01:29:26" (3/3) ...
[2020-08-21 13:29:26,226 INFO  L109   eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.3.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c
[2020-08-21 13:29:26,237 INFO  L157   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION
[2020-08-21 13:29:26,255 INFO  L169   ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2020-08-21 13:29:26,270 INFO  L251      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2020-08-21 13:29:26,307 INFO  L375      AbstractCegarLoop]: Interprodecural is true
[2020-08-21 13:29:26,307 INFO  L376      AbstractCegarLoop]: Hoare is true
[2020-08-21 13:29:26,307 INFO  L377      AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation
[2020-08-21 13:29:26,308 INFO  L378      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2020-08-21 13:29:26,308 INFO  L379      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2020-08-21 13:29:26,308 INFO  L380      AbstractCegarLoop]: Difference is false
[2020-08-21 13:29:26,308 INFO  L381      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2020-08-21 13:29:26,308 INFO  L385      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2020-08-21 13:29:26,350 INFO  L276                IsEmpty]: Start isEmpty. Operand 795 states.
[2020-08-21 13:29:26,388 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 325
[2020-08-21 13:29:26,388 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-21 13:29:26,390 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]
[2020-08-21 13:29:26,390 INFO  L427      AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-21 13:29:26,397 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-21 13:29:26,397 INFO  L82        PathProgramCache]: Analyzing trace with hash -2046950044, now seen corresponding path program 1 times
[2020-08-21 13:29:26,407 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-21 13:29:26,407 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1948541001]
[2020-08-21 13:29:26,408 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-21 13:29:27,673 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 13:29:28,740 WARN  L193               SmtUtils]: Spent 697.00 ms on a formula simplification that was a NOOP. DAG size: 283
[2020-08-21 13:29:28,747 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-21 13:29:28,757 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 13:29:29,001 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-08-21 13:29:29,002 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1948541001]
[2020-08-21 13:29:29,004 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-21 13:29:29,005 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2020-08-21 13:29:29,006 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351931323]
[2020-08-21 13:29:29,012 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 5 states
[2020-08-21 13:29:29,012 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-21 13:29:29,027 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2020-08-21 13:29:29,028 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2020-08-21 13:29:29,031 INFO  L87              Difference]: Start difference. First operand 795 states. Second operand 5 states.
[2020-08-21 13:29:37,194 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-21 13:29:37,194 INFO  L93              Difference]: Finished difference Result 2333 states and 4147 transitions.
[2020-08-21 13:29:37,195 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2020-08-21 13:29:37,197 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 324
[2020-08-21 13:29:37,199 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-21 13:29:37,245 INFO  L225             Difference]: With dead ends: 2333
[2020-08-21 13:29:37,245 INFO  L226             Difference]: Without dead ends: 1545
[2020-08-21 13:29:37,258 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30
[2020-08-21 13:29:37,279 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 1545 states.
[2020-08-21 13:29:37,414 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 1545 to 1543.
[2020-08-21 13:29:37,415 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 1543 states.
[2020-08-21 13:29:37,424 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 1543 states to 1543 states and 2401 transitions.
[2020-08-21 13:29:37,426 INFO  L78                 Accepts]: Start accepts. Automaton has 1543 states and 2401 transitions. Word has length 324
[2020-08-21 13:29:37,427 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-21 13:29:37,427 INFO  L479      AbstractCegarLoop]: Abstraction has 1543 states and 2401 transitions.
[2020-08-21 13:29:37,427 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2020-08-21 13:29:37,428 INFO  L276                IsEmpty]: Start isEmpty. Operand 1543 states and 2401 transitions.
[2020-08-21 13:29:37,434 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 327
[2020-08-21 13:29:37,434 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-21 13:29:37,435 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]
[2020-08-21 13:29:37,435 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2020-08-21 13:29:37,436 INFO  L427      AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-21 13:29:37,436 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-21 13:29:37,436 INFO  L82        PathProgramCache]: Analyzing trace with hash 1516440759, now seen corresponding path program 1 times
[2020-08-21 13:29:37,437 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-21 13:29:37,437 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1372222843]
[2020-08-21 13:29:37,437 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-21 13:29:37,550 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 13:29:38,292 WARN  L193               SmtUtils]: Spent 588.00 ms on a formula simplification that was a NOOP. DAG size: 283
[2020-08-21 13:29:38,293 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-21 13:29:38,299 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 13:29:38,548 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-08-21 13:29:38,549 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1372222843]
[2020-08-21 13:29:38,549 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-21 13:29:38,549 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-08-21 13:29:38,550 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445881145]
[2020-08-21 13:29:38,552 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-08-21 13:29:38,552 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-21 13:29:38,552 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-08-21 13:29:38,553 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-08-21 13:29:38,553 INFO  L87              Difference]: Start difference. First operand 1543 states and 2401 transitions. Second operand 4 states.
[2020-08-21 13:29:46,946 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-21 13:29:46,946 INFO  L93              Difference]: Finished difference Result 4438 states and 6875 transitions.
[2020-08-21 13:29:46,947 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2020-08-21 13:29:46,947 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 326
[2020-08-21 13:29:46,948 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-21 13:29:46,965 INFO  L225             Difference]: With dead ends: 4438
[2020-08-21 13:29:46,965 INFO  L226             Difference]: Without dead ends: 3024
[2020-08-21 13:29:46,969 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
[2020-08-21 13:29:46,975 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 3024 states.
[2020-08-21 13:29:47,096 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 3024 to 3022.
[2020-08-21 13:29:47,097 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 3022 states.
[2020-08-21 13:29:47,107 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 3022 states to 3022 states and 4679 transitions.
[2020-08-21 13:29:47,109 INFO  L78                 Accepts]: Start accepts. Automaton has 3022 states and 4679 transitions. Word has length 326
[2020-08-21 13:29:47,113 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-21 13:29:47,113 INFO  L479      AbstractCegarLoop]: Abstraction has 3022 states and 4679 transitions.
[2020-08-21 13:29:47,114 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2020-08-21 13:29:47,114 INFO  L276                IsEmpty]: Start isEmpty. Operand 3022 states and 4679 transitions.
[2020-08-21 13:29:47,125 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 327
[2020-08-21 13:29:47,125 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-21 13:29:47,126 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]
[2020-08-21 13:29:47,126 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2020-08-21 13:29:47,127 INFO  L427      AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-21 13:29:47,127 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-21 13:29:47,129 INFO  L82        PathProgramCache]: Analyzing trace with hash -545695684, now seen corresponding path program 1 times
[2020-08-21 13:29:47,133 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-21 13:29:47,133 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2130494274]
[2020-08-21 13:29:47,134 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-21 13:29:47,196 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 13:29:47,794 WARN  L193               SmtUtils]: Spent 505.00 ms on a formula simplification that was a NOOP. DAG size: 283
[2020-08-21 13:29:47,795 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-21 13:29:47,803 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 13:29:47,928 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-08-21 13:29:47,928 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2130494274]
[2020-08-21 13:29:47,937 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-21 13:29:47,938 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-08-21 13:29:47,938 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333721895]
[2020-08-21 13:29:47,939 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-08-21 13:29:47,940 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-21 13:29:47,940 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-08-21 13:29:47,940 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-08-21 13:29:47,941 INFO  L87              Difference]: Start difference. First operand 3022 states and 4679 transitions. Second operand 4 states.
[2020-08-21 13:29:55,776 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-21 13:29:55,777 INFO  L93              Difference]: Finished difference Result 8991 states and 13913 transitions.
[2020-08-21 13:29:55,777 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2020-08-21 13:29:55,778 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 326
[2020-08-21 13:29:55,778 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-21 13:29:55,805 INFO  L225             Difference]: With dead ends: 8991
[2020-08-21 13:29:55,805 INFO  L226             Difference]: Without dead ends: 6011
[2020-08-21 13:29:55,812 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-08-21 13:29:55,819 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 6011 states.
[2020-08-21 13:29:55,950 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 6011 to 3041.
[2020-08-21 13:29:55,950 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 3041 states.
[2020-08-21 13:29:55,959 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 3041 states to 3041 states and 4707 transitions.
[2020-08-21 13:29:55,959 INFO  L78                 Accepts]: Start accepts. Automaton has 3041 states and 4707 transitions. Word has length 326
[2020-08-21 13:29:55,960 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-21 13:29:55,960 INFO  L479      AbstractCegarLoop]: Abstraction has 3041 states and 4707 transitions.
[2020-08-21 13:29:55,960 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2020-08-21 13:29:55,960 INFO  L276                IsEmpty]: Start isEmpty. Operand 3041 states and 4707 transitions.
[2020-08-21 13:29:55,970 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 328
[2020-08-21 13:29:55,971 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-21 13:29:55,971 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]
[2020-08-21 13:29:55,971 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2020-08-21 13:29:55,972 INFO  L427      AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-21 13:29:55,972 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-21 13:29:55,972 INFO  L82        PathProgramCache]: Analyzing trace with hash -441096328, now seen corresponding path program 1 times
[2020-08-21 13:29:55,972 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-21 13:29:55,973 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2121865693]
[2020-08-21 13:29:55,974 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-21 13:29:56,065 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 13:29:56,532 WARN  L193               SmtUtils]: Spent 379.00 ms on a formula simplification that was a NOOP. DAG size: 283
[2020-08-21 13:29:56,533 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-21 13:29:56,538 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 13:29:56,634 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-08-21 13:29:56,634 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2121865693]
[2020-08-21 13:29:56,634 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-21 13:29:56,634 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-08-21 13:29:56,635 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314445402]
[2020-08-21 13:29:56,635 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-08-21 13:29:56,636 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-21 13:29:56,636 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-08-21 13:29:56,636 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-08-21 13:29:56,636 INFO  L87              Difference]: Start difference. First operand 3041 states and 4707 transitions. Second operand 4 states.
[2020-08-21 13:30:04,641 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-21 13:30:04,641 INFO  L93              Difference]: Finished difference Result 9010 states and 13934 transitions.
[2020-08-21 13:30:04,642 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2020-08-21 13:30:04,642 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 327
[2020-08-21 13:30:04,642 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-21 13:30:04,669 INFO  L225             Difference]: With dead ends: 9010
[2020-08-21 13:30:04,669 INFO  L226             Difference]: Without dead ends: 6029
[2020-08-21 13:30:04,676 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-08-21 13:30:04,683 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 6029 states.
[2020-08-21 13:30:04,817 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 6029 to 3059.
[2020-08-21 13:30:04,818 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 3059 states.
[2020-08-21 13:30:04,824 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 3059 states to 3059 states and 4728 transitions.
[2020-08-21 13:30:04,824 INFO  L78                 Accepts]: Start accepts. Automaton has 3059 states and 4728 transitions. Word has length 327
[2020-08-21 13:30:04,824 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-21 13:30:04,824 INFO  L479      AbstractCegarLoop]: Abstraction has 3059 states and 4728 transitions.
[2020-08-21 13:30:04,825 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2020-08-21 13:30:04,825 INFO  L276                IsEmpty]: Start isEmpty. Operand 3059 states and 4728 transitions.
[2020-08-21 13:30:04,834 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 329
[2020-08-21 13:30:04,834 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-21 13:30:04,835 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]
[2020-08-21 13:30:04,835 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3
[2020-08-21 13:30:04,836 INFO  L427      AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-21 13:30:04,836 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-21 13:30:04,836 INFO  L82        PathProgramCache]: Analyzing trace with hash -1648776142, now seen corresponding path program 1 times
[2020-08-21 13:30:04,836 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-21 13:30:04,837 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1313868996]
[2020-08-21 13:30:04,837 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-21 13:30:04,985 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 13:30:05,598 WARN  L193               SmtUtils]: Spent 446.00 ms on a formula simplification that was a NOOP. DAG size: 283
[2020-08-21 13:30:05,600 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-21 13:30:05,605 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 13:30:05,735 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-08-21 13:30:05,735 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1313868996]
[2020-08-21 13:30:05,736 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-21 13:30:05,736 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-08-21 13:30:05,736 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448683585]
[2020-08-21 13:30:05,736 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-08-21 13:30:05,737 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-21 13:30:05,737 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-08-21 13:30:05,737 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-08-21 13:30:05,737 INFO  L87              Difference]: Start difference. First operand 3059 states and 4728 transitions. Second operand 4 states.
[2020-08-21 13:30:13,427 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-21 13:30:13,427 INFO  L93              Difference]: Finished difference Result 8718 states and 13409 transitions.
[2020-08-21 13:30:13,434 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2020-08-21 13:30:13,434 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 328
[2020-08-21 13:30:13,435 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-21 13:30:13,454 INFO  L225             Difference]: With dead ends: 8718
[2020-08-21 13:30:13,455 INFO  L226             Difference]: Without dead ends: 5904
[2020-08-21 13:30:13,460 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-08-21 13:30:13,467 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 5904 states.
[2020-08-21 13:30:13,683 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 5904 to 5902.
[2020-08-21 13:30:13,683 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 5902 states.
[2020-08-21 13:30:13,694 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5902 states to 5902 states and 9056 transitions.
[2020-08-21 13:30:13,695 INFO  L78                 Accepts]: Start accepts. Automaton has 5902 states and 9056 transitions. Word has length 328
[2020-08-21 13:30:13,696 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-21 13:30:13,696 INFO  L479      AbstractCegarLoop]: Abstraction has 5902 states and 9056 transitions.
[2020-08-21 13:30:13,696 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2020-08-21 13:30:13,696 INFO  L276                IsEmpty]: Start isEmpty. Operand 5902 states and 9056 transitions.
[2020-08-21 13:30:13,711 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 329
[2020-08-21 13:30:13,711 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-21 13:30:13,712 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]
[2020-08-21 13:30:13,712 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4
[2020-08-21 13:30:13,712 INFO  L427      AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-21 13:30:13,712 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-21 13:30:13,713 INFO  L82        PathProgramCache]: Analyzing trace with hash 157244175, now seen corresponding path program 1 times
[2020-08-21 13:30:13,713 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-21 13:30:13,713 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1288686887]
[2020-08-21 13:30:13,713 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-21 13:30:14,062 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 13:30:14,575 WARN  L193               SmtUtils]: Spent 376.00 ms on a formula simplification that was a NOOP. DAG size: 283
[2020-08-21 13:30:14,577 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-21 13:30:14,582 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 13:30:14,718 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-08-21 13:30:14,718 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1288686887]
[2020-08-21 13:30:14,718 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-21 13:30:14,719 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2020-08-21 13:30:14,719 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536280766]
[2020-08-21 13:30:14,720 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 5 states
[2020-08-21 13:30:14,720 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-21 13:30:14,720 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2020-08-21 13:30:14,720 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2020-08-21 13:30:14,721 INFO  L87              Difference]: Start difference. First operand 5902 states and 9056 transitions. Second operand 5 states.
[2020-08-21 13:30:20,367 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-21 13:30:20,367 INFO  L93              Difference]: Finished difference Result 13189 states and 20201 transitions.
[2020-08-21 13:30:20,368 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2020-08-21 13:30:20,368 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 328
[2020-08-21 13:30:20,369 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-21 13:30:20,393 INFO  L225             Difference]: With dead ends: 13189
[2020-08-21 13:30:20,394 INFO  L226             Difference]: Without dead ends: 6775
[2020-08-21 13:30:20,403 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30
[2020-08-21 13:30:20,411 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 6775 states.
[2020-08-21 13:30:20,655 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 6775 to 6773.
[2020-08-21 13:30:20,656 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 6773 states.
[2020-08-21 13:30:20,666 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6773 states to 6773 states and 10350 transitions.
[2020-08-21 13:30:20,666 INFO  L78                 Accepts]: Start accepts. Automaton has 6773 states and 10350 transitions. Word has length 328
[2020-08-21 13:30:20,667 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-21 13:30:20,667 INFO  L479      AbstractCegarLoop]: Abstraction has 6773 states and 10350 transitions.
[2020-08-21 13:30:20,667 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2020-08-21 13:30:20,667 INFO  L276                IsEmpty]: Start isEmpty. Operand 6773 states and 10350 transitions.
[2020-08-21 13:30:20,684 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 331
[2020-08-21 13:30:20,684 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-21 13:30:20,684 INFO  L422         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-08-21 13:30:20,685 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5
[2020-08-21 13:30:20,685 INFO  L427      AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-21 13:30:20,685 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-21 13:30:20,685 INFO  L82        PathProgramCache]: Analyzing trace with hash -1619567406, now seen corresponding path program 1 times
[2020-08-21 13:30:20,686 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-21 13:30:20,686 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1422541390]
[2020-08-21 13:30:20,686 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-21 13:30:20,731 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 13:30:21,183 WARN  L193               SmtUtils]: Spent 376.00 ms on a formula simplification that was a NOOP. DAG size: 283
[2020-08-21 13:30:21,184 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-21 13:30:21,189 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 13:30:21,324 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-08-21 13:30:21,325 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1422541390]
[2020-08-21 13:30:21,326 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-21 13:30:21,326 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-08-21 13:30:21,326 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256803499]
[2020-08-21 13:30:21,327 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-08-21 13:30:21,328 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-21 13:30:21,328 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-08-21 13:30:21,328 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-08-21 13:30:21,328 INFO  L87              Difference]: Start difference. First operand 6773 states and 10350 transitions. Second operand 4 states.