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


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


This is Ultimate 0.1.25-eb0fd7c
[2020-09-21 10:32:22,259 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2020-09-21 10:32:22,264 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2020-09-21 10:32:22,306 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2020-09-21 10:32:22,307 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2020-09-21 10:32:22,315 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2020-09-21 10:32:22,318 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
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[2020-09-21 10:32:22,330 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2020-09-21 10:32:22,333 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
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[2020-09-21 10:32:22,337 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2020-09-21 10:32:22,339 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2020-09-21 10:32:22,340 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2020-09-21 10:32:22,342 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2020-09-21 10:32:22,351 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2020-09-21 10:32:22,353 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2020-09-21 10:32:22,354 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2020-09-21 10:32:22,355 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2020-09-21 10:32:22,356 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2020-09-21 10:32:22,369 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2020-09-21 10:32:22,369 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2020-09-21 10:32:22,369 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2020-09-21 10:32:22,376 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2020-09-21 10:32:22,376 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2020-09-21 10:32:22,377 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2020-09-21 10:32:22,377 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
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[2020-09-21 10:32:22,389 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
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[2020-09-21 10:32:22,391 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2020-09-21 10:32:22,392 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
[2020-09-21 10:32:22,434 INFO  L113        SettingsManager]: Loading preferences was successful
[2020-09-21 10:32:22,434 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2020-09-21 10:32:22,436 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2020-09-21 10:32:22,436 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2020-09-21 10:32:22,437 INFO  L138        SettingsManager]:  * Use SBE=true
[2020-09-21 10:32:22,437 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2020-09-21 10:32:22,437 INFO  L138        SettingsManager]:  * sizeof long=4
[2020-09-21 10:32:22,438 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2020-09-21 10:32:22,438 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2020-09-21 10:32:22,438 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2020-09-21 10:32:22,439 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2020-09-21 10:32:22,439 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2020-09-21 10:32:22,439 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2020-09-21 10:32:22,440 INFO  L138        SettingsManager]:  * sizeof long double=12
[2020-09-21 10:32:22,440 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2020-09-21 10:32:22,440 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2020-09-21 10:32:22,441 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2020-09-21 10:32:22,441 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2020-09-21 10:32:22,441 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2020-09-21 10:32:22,441 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2020-09-21 10:32:22,441 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2020-09-21 10:32:22,442 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-09-21 10:32:22,442 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2020-09-21 10:32:22,442 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2020-09-21 10:32:22,442 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2020-09-21 10:32:22,442 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2020-09-21 10:32:22,443 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-09-21 10:32:22,443 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2020-09-21 10:32:22,443 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2020-09-21 10:32:22,443 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
[2020-09-21 10:32:22,903 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2020-09-21 10:32:22,930 INFO  L258   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2020-09-21 10:32:22,935 INFO  L214   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2020-09-21 10:32:22,936 INFO  L271        PluginConnector]: Initializing CDTParser...
[2020-09-21 10:32:22,937 INFO  L275        PluginConnector]: CDTParser initialized
[2020-09-21 10:32:22,938 INFO  L429   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c
[2020-09-21 10:32:23,035 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/267addb42/20757073daeb45a1b4544a3a137d1fc3/FLAGf474a3872
[2020-09-21 10:32:23,761 INFO  L306              CDTParser]: Found 1 translation units.
[2020-09-21 10:32:23,762 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c
[2020-09-21 10:32:23,797 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/267addb42/20757073daeb45a1b4544a3a137d1fc3/FLAGf474a3872
[2020-09-21 10:32:23,928 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/267addb42/20757073daeb45a1b4544a3a137d1fc3
[2020-09-21 10:32:23,942 INFO  L296   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2020-09-21 10:32:23,950 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2020-09-21 10:32:23,954 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2020-09-21 10:32:23,954 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2020-09-21 10:32:23,959 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2020-09-21 10:32:23,960 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 10:32:23" (1/1) ...
[2020-09-21 10:32:23,965 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@13d7d7c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:32:23, skipping insertion in model container
[2020-09-21 10:32:23,965 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 10:32:23" (1/1) ...
[2020-09-21 10:32:23,977 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2020-09-21 10:32:24,113 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2020-09-21 10:32:25,290 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-09-21 10:32:25,307 INFO  L203         MainTranslator]: Completed pre-run
[2020-09-21 10:32:25,775 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-09-21 10:32:25,801 INFO  L208         MainTranslator]: Completed translation
[2020-09-21 10:32:25,801 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:32:25 WrapperNode
[2020-09-21 10:32:25,802 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2020-09-21 10:32:25,802 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2020-09-21 10:32:25,803 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2020-09-21 10:32:25,803 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2020-09-21 10:32:25,823 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:32:25" (1/1) ...
[2020-09-21 10:32:25,824 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:32:25" (1/1) ...
[2020-09-21 10:32:25,855 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:32:25" (1/1) ...
[2020-09-21 10:32:25,856 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:32:25" (1/1) ...
[2020-09-21 10:32:25,912 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:32:25" (1/1) ...
[2020-09-21 10:32:25,949 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:32:25" (1/1) ...
[2020-09-21 10:32:25,958 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:32:25" (1/1) ...
[2020-09-21 10:32:25,971 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2020-09-21 10:32:25,972 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2020-09-21 10:32:25,972 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2020-09-21 10:32:25,972 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2020-09-21 10:32:25,974 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:32:25" (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
[2020-09-21 10:32:26,098 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2020-09-21 10:32:26,098 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2020-09-21 10:32:26,098 INFO  L138     BoogieDeclarations]: Found implementation of procedure assume_abort_if_not
[2020-09-21 10:32:26,099 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2020-09-21 10:32:26,099 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2020-09-21 10:32:26,099 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char
[2020-09-21 10:32:26,100 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar
[2020-09-21 10:32:26,100 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool
[2020-09-21 10:32:26,100 INFO  L130     BoogieDeclarations]: Found specification of procedure assert
[2020-09-21 10:32:26,100 INFO  L130     BoogieDeclarations]: Found specification of procedure abort
[2020-09-21 10:32:26,101 INFO  L130     BoogieDeclarations]: Found specification of procedure assume_abort_if_not
[2020-09-21 10:32:26,101 INFO  L130     BoogieDeclarations]: Found specification of procedure read
[2020-09-21 10:32:26,101 INFO  L130     BoogieDeclarations]: Found specification of procedure write
[2020-09-21 10:32:26,101 INFO  L130     BoogieDeclarations]: Found specification of procedure node1
[2020-09-21 10:32:26,102 INFO  L130     BoogieDeclarations]: Found specification of procedure node2
[2020-09-21 10:32:26,102 INFO  L130     BoogieDeclarations]: Found specification of procedure node3
[2020-09-21 10:32:26,102 INFO  L130     BoogieDeclarations]: Found specification of procedure node4
[2020-09-21 10:32:26,102 INFO  L130     BoogieDeclarations]: Found specification of procedure init
[2020-09-21 10:32:26,103 INFO  L130     BoogieDeclarations]: Found specification of procedure check
[2020-09-21 10:32:26,103 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2020-09-21 10:32:26,103 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2020-09-21 10:32:26,104 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2020-09-21 10:32:28,983 INFO  L290             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2020-09-21 10:32:28,984 INFO  L295             CfgBuilder]: Removed 0 assume(true) statements.
[2020-09-21 10:32:28,994 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 10:32:28 BoogieIcfgContainer
[2020-09-21 10:32:28,995 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2020-09-21 10:32:28,996 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2020-09-21 10:32:28,996 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2020-09-21 10:32:29,000 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2020-09-21 10:32:29,001 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 10:32:23" (1/3) ...
[2020-09-21 10:32:29,002 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2085002 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 10:32:29, skipping insertion in model container
[2020-09-21 10:32:29,002 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:32:25" (2/3) ...
[2020-09-21 10:32:29,002 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2085002 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 10:32:29, skipping insertion in model container
[2020-09-21 10:32:29,003 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 10:32:28" (3/3) ...
[2020-09-21 10:32:29,005 INFO  L109   eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c
[2020-09-21 10:32:29,018 INFO  L157   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION
[2020-09-21 10:32:29,030 INFO  L169   ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2020-09-21 10:32:29,052 INFO  L251      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2020-09-21 10:32:29,084 INFO  L375      AbstractCegarLoop]: Interprodecural is true
[2020-09-21 10:32:29,084 INFO  L376      AbstractCegarLoop]: Hoare is true
[2020-09-21 10:32:29,085 INFO  L377      AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation
[2020-09-21 10:32:29,085 INFO  L378      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2020-09-21 10:32:29,085 INFO  L379      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2020-09-21 10:32:29,085 INFO  L380      AbstractCegarLoop]: Difference is false
[2020-09-21 10:32:29,085 INFO  L381      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2020-09-21 10:32:29,085 INFO  L385      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2020-09-21 10:32:29,130 INFO  L276                IsEmpty]: Start isEmpty. Operand 808 states.
[2020-09-21 10:32:29,176 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 331
[2020-09-21 10:32:29,177 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-21 10:32:29,178 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]
[2020-09-21 10:32:29,179 INFO  L427      AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-21 10:32:29,187 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-21 10:32:29,187 INFO  L82        PathProgramCache]: Analyzing trace with hash 1078138388, now seen corresponding path program 1 times
[2020-09-21 10:32:29,199 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-21 10:32:29,199 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1780092965]
[2020-09-21 10:32:29,200 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-21 10:32:30,027 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-21 10:32:31,243 WARN  L193               SmtUtils]: Spent 551.00 ms on a formula simplification that was a NOOP. DAG size: 277
[2020-09-21 10:32:31,257 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-21 10:32:31,273 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-21 10:32:31,719 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-09-21 10:32:31,722 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1780092965]
[2020-09-21 10:32:31,725 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-09-21 10:32:31,726 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-09-21 10:32:31,728 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854896427]
[2020-09-21 10:32:31,743 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-09-21 10:32:31,744 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-21 10:32:31,769 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-09-21 10:32:31,772 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-09-21 10:32:31,776 INFO  L87              Difference]: Start difference. First operand 808 states. Second operand 4 states.
[2020-09-21 10:32:32,419 WARN  L193               SmtUtils]: Spent 527.00 ms on a formula simplification that was a NOOP. DAG size: 278
[2020-09-21 10:32:37,939 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-21 10:32:37,940 INFO  L93              Difference]: Finished difference Result 1527 states and 2683 transitions.
[2020-09-21 10:32:37,941 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2020-09-21 10:32:37,943 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 330
[2020-09-21 10:32:37,946 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-21 10:32:37,989 INFO  L225             Difference]: With dead ends: 1527
[2020-09-21 10:32:37,989 INFO  L226             Difference]: Without dead ends: 1311
[2020-09-21 10:32:37,998 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2020-09-21 10:32:38,026 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 1311 states.
[2020-09-21 10:32:38,155 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 1311 to 1309.
[2020-09-21 10:32:38,157 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 1309 states.
[2020-09-21 10:32:38,164 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 1309 states to 1309 states and 2040 transitions.
[2020-09-21 10:32:38,166 INFO  L78                 Accepts]: Start accepts. Automaton has 1309 states and 2040 transitions. Word has length 330
[2020-09-21 10:32:38,168 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-09-21 10:32:38,168 INFO  L479      AbstractCegarLoop]: Abstraction has 1309 states and 2040 transitions.
[2020-09-21 10:32:38,168 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2020-09-21 10:32:38,169 INFO  L276                IsEmpty]: Start isEmpty. Operand 1309 states and 2040 transitions.
[2020-09-21 10:32:38,178 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 331
[2020-09-21 10:32:38,178 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-21 10:32:38,178 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]
[2020-09-21 10:32:38,179 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2020-09-21 10:32:38,179 INFO  L427      AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-21 10:32:38,179 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-21 10:32:38,180 INFO  L82        PathProgramCache]: Analyzing trace with hash 1867298226, now seen corresponding path program 1 times
[2020-09-21 10:32:38,180 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-21 10:32:38,180 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [340992909]
[2020-09-21 10:32:38,181 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-21 10:32:38,452 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-21 10:32:39,335 WARN  L193               SmtUtils]: Spent 519.00 ms on a formula simplification that was a NOOP. DAG size: 277
[2020-09-21 10:32:39,337 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-21 10:32:39,343 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-21 10:32:39,563 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-09-21 10:32:39,564 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [340992909]
[2020-09-21 10:32:39,565 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-09-21 10:32:39,565 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-09-21 10:32:39,565 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527960246]
[2020-09-21 10:32:39,570 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-09-21 10:32:39,571 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-21 10:32:39,571 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-09-21 10:32:39,572 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-09-21 10:32:39,572 INFO  L87              Difference]: Start difference. First operand 1309 states and 2040 transitions. Second operand 4 states.
[2020-09-21 10:32:40,324 WARN  L193               SmtUtils]: Spent 684.00 ms on a formula simplification that was a NOOP. DAG size: 278
[2020-09-21 10:32:45,167 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-21 10:32:45,168 INFO  L93              Difference]: Finished difference Result 2683 states and 4213 transitions.
[2020-09-21 10:32:45,169 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2020-09-21 10:32:45,169 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 330
[2020-09-21 10:32:45,173 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-21 10:32:45,192 INFO  L225             Difference]: With dead ends: 2683
[2020-09-21 10:32:45,193 INFO  L226             Difference]: Without dead ends: 2301
[2020-09-21 10:32:45,201 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2020-09-21 10:32:45,208 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 2301 states.
[2020-09-21 10:32:45,323 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 2301 to 2299.
[2020-09-21 10:32:45,324 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 2299 states.
[2020-09-21 10:32:45,343 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 2299 states to 2299 states and 3576 transitions.
[2020-09-21 10:32:45,344 INFO  L78                 Accepts]: Start accepts. Automaton has 2299 states and 3576 transitions. Word has length 330
[2020-09-21 10:32:45,346 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-09-21 10:32:45,346 INFO  L479      AbstractCegarLoop]: Abstraction has 2299 states and 3576 transitions.
[2020-09-21 10:32:45,347 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2020-09-21 10:32:45,347 INFO  L276                IsEmpty]: Start isEmpty. Operand 2299 states and 3576 transitions.
[2020-09-21 10:32:45,363 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 331
[2020-09-21 10:32:45,364 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-21 10:32:45,364 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]
[2020-09-21 10:32:45,366 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2020-09-21 10:32:45,371 INFO  L427      AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-21 10:32:45,371 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-21 10:32:45,372 INFO  L82        PathProgramCache]: Analyzing trace with hash -1297523319, now seen corresponding path program 1 times
[2020-09-21 10:32:45,372 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-21 10:32:45,373 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1095220758]
[2020-09-21 10:32:45,373 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-21 10:32:45,765 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-21 10:32:46,682 WARN  L193               SmtUtils]: Spent 526.00 ms on a formula simplification that was a NOOP. DAG size: 277
[2020-09-21 10:32:46,683 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-21 10:32:46,690 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-21 10:32:46,898 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-09-21 10:32:46,898 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1095220758]
[2020-09-21 10:32:46,899 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-09-21 10:32:46,900 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-09-21 10:32:46,900 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331083763]
[2020-09-21 10:32:46,901 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-09-21 10:32:46,901 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-21 10:32:46,901 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-09-21 10:32:46,903 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-09-21 10:32:46,903 INFO  L87              Difference]: Start difference. First operand 2299 states and 3576 transitions. Second operand 4 states.
[2020-09-21 10:32:47,433 WARN  L193               SmtUtils]: Spent 495.00 ms on a formula simplification that was a NOOP. DAG size: 278
[2020-09-21 10:32:51,800 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-21 10:32:51,800 INFO  L93              Difference]: Finished difference Result 4867 states and 7634 transitions.
[2020-09-21 10:32:51,801 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2020-09-21 10:32:51,801 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 330
[2020-09-21 10:32:51,802 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-21 10:32:51,822 INFO  L225             Difference]: With dead ends: 4867
[2020-09-21 10:32:51,823 INFO  L226             Difference]: Without dead ends: 4201
[2020-09-21 10:32:51,825 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2020-09-21 10:32:51,831 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 4201 states.
[2020-09-21 10:32:51,954 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 4201 to 4199.
[2020-09-21 10:32:51,955 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 4199 states.
[2020-09-21 10:32:51,978 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 4199 states to 4199 states and 6516 transitions.
[2020-09-21 10:32:51,978 INFO  L78                 Accepts]: Start accepts. Automaton has 4199 states and 6516 transitions. Word has length 330
[2020-09-21 10:32:51,979 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-09-21 10:32:51,980 INFO  L479      AbstractCegarLoop]: Abstraction has 4199 states and 6516 transitions.
[2020-09-21 10:32:51,980 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2020-09-21 10:32:51,980 INFO  L276                IsEmpty]: Start isEmpty. Operand 4199 states and 6516 transitions.
[2020-09-21 10:32:51,992 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 331
[2020-09-21 10:32:51,993 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-21 10:32:51,993 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]
[2020-09-21 10:32:51,994 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2020-09-21 10:32:51,994 INFO  L427      AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-21 10:32:51,994 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-21 10:32:51,995 INFO  L82        PathProgramCache]: Analyzing trace with hash 1852614154, now seen corresponding path program 1 times
[2020-09-21 10:32:51,996 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-21 10:32:51,996 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [482738746]
[2020-09-21 10:32:51,997 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-21 10:32:52,451 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-21 10:32:53,082 WARN  L193               SmtUtils]: Spent 410.00 ms on a formula simplification that was a NOOP. DAG size: 277
[2020-09-21 10:32:53,083 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-21 10:32:53,090 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-21 10:32:53,361 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-09-21 10:32:53,361 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [482738746]
[2020-09-21 10:32:53,362 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-09-21 10:32:53,362 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2020-09-21 10:32:53,362 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809599299]
[2020-09-21 10:32:53,363 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 5 states
[2020-09-21 10:32:53,363 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-21 10:32:53,363 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2020-09-21 10:32:53,364 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2020-09-21 10:32:53,364 INFO  L87              Difference]: Start difference. First operand 4199 states and 6516 transitions. Second operand 5 states.
[2020-09-21 10:33:01,215 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-21 10:33:01,216 INFO  L93              Difference]: Finished difference Result 12414 states and 19245 transitions.
[2020-09-21 10:33:01,216 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2020-09-21 10:33:01,216 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 330
[2020-09-21 10:33:01,217 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-21 10:33:01,253 INFO  L225             Difference]: With dead ends: 12414
[2020-09-21 10:33:01,253 INFO  L226             Difference]: Without dead ends: 8230
[2020-09-21 10:33:01,262 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
[2020-09-21 10:33:01,271 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 8230 states.
[2020-09-21 10:33:01,613 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 8230 to 8228.
[2020-09-21 10:33:01,613 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 8228 states.
[2020-09-21 10:33:01,645 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 8228 states to 8228 states and 12694 transitions.
[2020-09-21 10:33:01,645 INFO  L78                 Accepts]: Start accepts. Automaton has 8228 states and 12694 transitions. Word has length 330
[2020-09-21 10:33:01,646 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-09-21 10:33:01,646 INFO  L479      AbstractCegarLoop]: Abstraction has 8228 states and 12694 transitions.
[2020-09-21 10:33:01,646 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2020-09-21 10:33:01,647 INFO  L276                IsEmpty]: Start isEmpty. Operand 8228 states and 12694 transitions.
[2020-09-21 10:33:01,672 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 333
[2020-09-21 10:33:01,672 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-21 10:33:01,673 INFO  L422         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-21 10:33:01,673 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3
[2020-09-21 10:33:01,674 INFO  L427      AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-21 10:33:01,674 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-21 10:33:01,674 INFO  L82        PathProgramCache]: Analyzing trace with hash 569689837, now seen corresponding path program 1 times
[2020-09-21 10:33:01,675 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-21 10:33:01,675 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1738167406]
[2020-09-21 10:33:01,675 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-21 10:33:01,813 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-21 10:33:02,461 WARN  L193               SmtUtils]: Spent 424.00 ms on a formula simplification that was a NOOP. DAG size: 277
[2020-09-21 10:33:02,463 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-21 10:33:02,472 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-21 10:33:02,646 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-09-21 10:33:02,646 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1738167406]
[2020-09-21 10:33:02,647 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-09-21 10:33:02,647 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-09-21 10:33:02,647 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500589513]
[2020-09-21 10:33:02,648 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-09-21 10:33:02,648 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-21 10:33:02,648 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-09-21 10:33:02,649 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-09-21 10:33:02,649 INFO  L87              Difference]: Start difference. First operand 8228 states and 12694 transitions. Second operand 4 states.
[2020-09-21 10:33:11,423 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-21 10:33:11,423 INFO  L93              Difference]: Finished difference Result 24233 states and 37318 transitions.
[2020-09-21 10:33:11,423 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2020-09-21 10:33:11,424 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 332
[2020-09-21 10:33:11,424 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-21 10:33:11,481 INFO  L225             Difference]: With dead ends: 24233
[2020-09-21 10:33:11,482 INFO  L226             Difference]: Without dead ends: 16134
[2020-09-21 10:33:11,498 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
[2020-09-21 10:33:11,514 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 16134 states.
[2020-09-21 10:33:11,933 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 16134 to 16132.
[2020-09-21 10:33:11,934 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 16132 states.
[2020-09-21 10:33:11,963 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 16132 states to 16132 states and 24741 transitions.
[2020-09-21 10:33:11,964 INFO  L78                 Accepts]: Start accepts. Automaton has 16132 states and 24741 transitions. Word has length 332
[2020-09-21 10:33:11,964 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-09-21 10:33:11,965 INFO  L479      AbstractCegarLoop]: Abstraction has 16132 states and 24741 transitions.
[2020-09-21 10:33:11,965 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2020-09-21 10:33:11,965 INFO  L276                IsEmpty]: Start isEmpty. Operand 16132 states and 24741 transitions.
[2020-09-21 10:33:11,997 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 333
[2020-09-21 10:33:11,997 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-21 10:33:11,998 INFO  L422         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-21 10:33:11,998 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4
[2020-09-21 10:33:11,998 INFO  L427      AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-21 10:33:11,998 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-21 10:33:12,000 INFO  L82        PathProgramCache]: Analyzing trace with hash -310142286, now seen corresponding path program 1 times
[2020-09-21 10:33:12,004 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-21 10:33:12,004 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1085817103]
[2020-09-21 10:33:12,004 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-21 10:33:12,077 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-21 10:33:12,831 WARN  L193               SmtUtils]: Spent 652.00 ms on a formula simplification that was a NOOP. DAG size: 277
[2020-09-21 10:33:12,832 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-21 10:33:12,838 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-21 10:33:12,944 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-09-21 10:33:12,944 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1085817103]
[2020-09-21 10:33:12,945 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-09-21 10:33:12,953 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-09-21 10:33:12,954 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237697626]
[2020-09-21 10:33:12,954 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-09-21 10:33:12,954 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-21 10:33:12,956 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-09-21 10:33:12,957 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-09-21 10:33:12,957 INFO  L87              Difference]: Start difference. First operand 16132 states and 24741 transitions. Second operand 4 states.