/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 true --traceabstraction.additional.smt.options enumeration-timeout=1000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+lh-reducer.c


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


This is Ultimate 0.1.25-177f698
[2020-08-21 16:40:25,958 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2020-08-21 16:40:25,961 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2020-08-21 16:40:26,000 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2020-08-21 16:40:26,000 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2020-08-21 16:40:26,009 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2020-08-21 16:40:26,011 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
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[2020-08-21 16:40:26,022 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2020-08-21 16:40:26,024 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2020-08-21 16:40:26,026 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2020-08-21 16:40:26,028 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2020-08-21 16:40:26,028 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2020-08-21 16:40:26,029 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2020-08-21 16:40:26,031 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2020-08-21 16:40:26,039 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2020-08-21 16:40:26,041 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2020-08-21 16:40:26,042 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2020-08-21 16:40:26,043 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2020-08-21 16:40:26,043 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2020-08-21 16:40:26,055 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2020-08-21 16:40:26,055 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2020-08-21 16:40:26,062 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2020-08-21 16:40:26,063 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2020-08-21 16:40:26,063 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2020-08-21 16:40:26,064 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2020-08-21 16:40:26,064 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2020-08-21 16:40:26,067 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2020-08-21 16:40:26,068 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2020-08-21 16:40:26,069 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2020-08-21 16:40:26,070 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2020-08-21 16:40:26,072 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
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[2020-08-21 16:40:26,074 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
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[2020-08-21 16:40:26,075 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2020-08-21 16:40:26,076 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 16:40:26,109 INFO  L113        SettingsManager]: Loading preferences was successful
[2020-08-21 16:40:26,109 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2020-08-21 16:40:26,111 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2020-08-21 16:40:26,111 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2020-08-21 16:40:26,112 INFO  L138        SettingsManager]:  * Use SBE=true
[2020-08-21 16:40:26,112 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2020-08-21 16:40:26,112 INFO  L138        SettingsManager]:  * sizeof long=4
[2020-08-21 16:40:26,112 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2020-08-21 16:40:26,112 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2020-08-21 16:40:26,113 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2020-08-21 16:40:26,113 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2020-08-21 16:40:26,114 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2020-08-21 16:40:26,114 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2020-08-21 16:40:26,114 INFO  L138        SettingsManager]:  * sizeof long double=12
[2020-08-21 16:40:26,114 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2020-08-21 16:40:26,115 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2020-08-21 16:40:26,115 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2020-08-21 16:40:26,115 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2020-08-21 16:40:26,115 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2020-08-21 16:40:26,116 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2020-08-21 16:40:26,116 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2020-08-21 16:40:26,116 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-08-21 16:40:26,116 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2020-08-21 16:40:26,117 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2020-08-21 16:40:26,117 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2020-08-21 16:40:26,117 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2020-08-21 16:40:26,117 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-08-21 16:40:26,117 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2020-08-21 16:40:26,118 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2020-08-21 16:40:26,118 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 -> true
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=1000;interpolation-heuristic=SMALLEST;log-additional-information=true;
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=1000;interpolation-heuristic=SMALLEST;log-additional-information=true;
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=1000;interpolation-heuristic=SMALLEST;log-additional-information=true;
[2020-08-21 16:40:26,433 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2020-08-21 16:40:26,446 INFO  L258   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2020-08-21 16:40:26,449 INFO  L214   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2020-08-21 16:40:26,451 INFO  L271        PluginConnector]: Initializing CDTParser...
[2020-08-21 16:40:26,451 INFO  L275        PluginConnector]: CDTParser initialized
[2020-08-21 16:40:26,452 INFO  L429   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+lh-reducer.c
[2020-08-21 16:40:26,530 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/82e1fd049/456e7d5b95fd4303b27ce998cbac41f0/FLAG3c993a29a
[2020-08-21 16:40:27,046 INFO  L306              CDTParser]: Found 1 translation units.
[2020-08-21 16:40:27,046 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+lh-reducer.c
[2020-08-21 16:40:27,055 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/82e1fd049/456e7d5b95fd4303b27ce998cbac41f0/FLAG3c993a29a
[2020-08-21 16:40:27,362 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/82e1fd049/456e7d5b95fd4303b27ce998cbac41f0
[2020-08-21 16:40:27,375 INFO  L296   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2020-08-21 16:40:27,377 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2020-08-21 16:40:27,380 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2020-08-21 16:40:27,380 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2020-08-21 16:40:27,384 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2020-08-21 16:40:27,385 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 04:40:27" (1/1) ...
[2020-08-21 16:40:27,389 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2876d654 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:40:27, skipping insertion in model container
[2020-08-21 16:40:27,389 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 04:40:27" (1/1) ...
[2020-08-21 16:40:27,398 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2020-08-21 16:40:27,443 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2020-08-21 16:40:27,734 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-08-21 16:40:27,830 INFO  L203         MainTranslator]: Completed pre-run
[2020-08-21 16:40:27,901 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-08-21 16:40:27,920 INFO  L208         MainTranslator]: Completed translation
[2020-08-21 16:40:27,921 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:40:27 WrapperNode
[2020-08-21 16:40:27,921 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2020-08-21 16:40:27,921 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2020-08-21 16:40:27,922 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2020-08-21 16:40:27,923 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2020-08-21 16:40:27,934 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:40:27" (1/1) ...
[2020-08-21 16:40:27,935 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:40:27" (1/1) ...
[2020-08-21 16:40:27,952 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:40:27" (1/1) ...
[2020-08-21 16:40:27,953 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:40:27" (1/1) ...
[2020-08-21 16:40:27,997 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:40:27" (1/1) ...
[2020-08-21 16:40:28,006 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:40:27" (1/1) ...
[2020-08-21 16:40:28,012 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:40:27" (1/1) ...
[2020-08-21 16:40:28,023 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2020-08-21 16:40:28,023 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2020-08-21 16:40:28,023 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2020-08-21 16:40:28,023 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2020-08-21 16:40:28,024 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:40:27" (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 16:40:28,101 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2020-08-21 16:40:28,102 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2020-08-21 16:40:28,102 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2020-08-21 16:40:28,103 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2020-08-21 16:40:28,103 INFO  L130     BoogieDeclarations]: Found specification of procedure Id_MCDC_89
[2020-08-21 16:40:28,103 INFO  L130     BoogieDeclarations]: Found specification of procedure fopen
[2020-08-21 16:40:28,103 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2020-08-21 16:40:28,103 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_assert
[2020-08-21 16:40:28,103 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack
[2020-08-21 16:40:28,104 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc
[2020-08-21 16:40:28,105 INFO  L130     BoogieDeclarations]: Found specification of procedure read~$Pointer$
[2020-08-21 16:40:28,105 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~int
[2020-08-21 16:40:28,105 INFO  L130     BoogieDeclarations]: Found specification of procedure read~int
[2020-08-21 16:40:28,105 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2020-08-21 16:40:28,105 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2020-08-21 16:40:28,106 INFO  L130     BoogieDeclarations]: Found specification of procedure write~$Pointer$
[2020-08-21 16:40:28,106 INFO  L130     BoogieDeclarations]: Found specification of procedure write~int
[2020-08-21 16:40:30,895 INFO  L290             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2020-08-21 16:40:30,896 INFO  L295             CfgBuilder]: Removed 0 assume(true) statements.
[2020-08-21 16:40:30,900 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 04:40:30 BoogieIcfgContainer
[2020-08-21 16:40:30,900 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2020-08-21 16:40:30,901 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2020-08-21 16:40:30,902 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2020-08-21 16:40:30,905 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2020-08-21 16:40:30,905 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 04:40:27" (1/3) ...
[2020-08-21 16:40:30,906 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46d4cdeb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 04:40:30, skipping insertion in model container
[2020-08-21 16:40:30,907 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:40:27" (2/3) ...
[2020-08-21 16:40:30,907 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46d4cdeb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 04:40:30, skipping insertion in model container
[2020-08-21 16:40:30,907 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 04:40:30" (3/3) ...
[2020-08-21 16:40:30,909 INFO  L109   eAbstractionObserver]: Analyzing ICFG aiob_4.c.v+lh-reducer.c
[2020-08-21 16:40:30,920 INFO  L157   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION
[2020-08-21 16:40:30,928 INFO  L169   ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2020-08-21 16:40:30,942 INFO  L251      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2020-08-21 16:40:30,967 INFO  L375      AbstractCegarLoop]: Interprodecural is true
[2020-08-21 16:40:30,967 INFO  L376      AbstractCegarLoop]: Hoare is true
[2020-08-21 16:40:30,967 INFO  L377      AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation
[2020-08-21 16:40:30,967 INFO  L378      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2020-08-21 16:40:30,968 INFO  L379      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2020-08-21 16:40:30,968 INFO  L380      AbstractCegarLoop]: Difference is false
[2020-08-21 16:40:30,968 INFO  L381      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2020-08-21 16:40:30,968 INFO  L385      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2020-08-21 16:40:30,987 INFO  L276                IsEmpty]: Start isEmpty. Operand 19 states.
[2020-08-21 16:40:30,994 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 13
[2020-08-21 16:40:30,995 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-21 16:40:30,996 INFO  L422         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-08-21 16:40:30,996 INFO  L427      AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-21 16:40:31,003 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-21 16:40:31,003 INFO  L82        PathProgramCache]: Analyzing trace with hash 1960518123, now seen corresponding path program 1 times
[2020-08-21 16:40:31,013 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-21 16:40:31,013 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [71862428]
[2020-08-21 16:40:31,013 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-21 16:40:31,243 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 16:40:31,488 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-21 16:40:31,491 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 16:40:31,503 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 16:40:31,504 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [71862428]
[2020-08-21 16:40:31,507 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-21 16:40:31,507 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2020-08-21 16:40:31,508 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793422787]
[2020-08-21 16:40:31,513 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 5 states
[2020-08-21 16:40:31,513 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-21 16:40:31,527 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2020-08-21 16:40:31,528 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2020-08-21 16:40:31,531 INFO  L87              Difference]: Start difference. First operand 19 states. Second operand 5 states.
[2020-08-21 16:40:33,762 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-21 16:40:33,762 INFO  L93              Difference]: Finished difference Result 38 states and 46 transitions.
[2020-08-21 16:40:33,763 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2020-08-21 16:40:33,764 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 12
[2020-08-21 16:40:33,765 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-21 16:40:33,774 INFO  L225             Difference]: With dead ends: 38
[2020-08-21 16:40:33,775 INFO  L226             Difference]: Without dead ends: 21
[2020-08-21 16:40:33,778 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42
[2020-08-21 16:40:33,798 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 21 states.
[2020-08-21 16:40:33,818 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 18.
[2020-08-21 16:40:33,819 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 18 states.
[2020-08-21 16:40:33,820 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions.
[2020-08-21 16:40:33,822 INFO  L78                 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 12
[2020-08-21 16:40:33,823 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-21 16:40:33,823 INFO  L479      AbstractCegarLoop]: Abstraction has 18 states and 18 transitions.
[2020-08-21 16:40:33,823 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2020-08-21 16:40:33,823 INFO  L276                IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions.
[2020-08-21 16:40:33,824 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 18
[2020-08-21 16:40:33,824 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-21 16:40:33,824 INFO  L422         BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-08-21 16:40:33,824 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2020-08-21 16:40:33,825 INFO  L427      AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-21 16:40:33,825 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-21 16:40:33,825 INFO  L82        PathProgramCache]: Analyzing trace with hash 1182240945, now seen corresponding path program 1 times
[2020-08-21 16:40:33,825 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-21 16:40:33,826 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1353279747]
[2020-08-21 16:40:33,826 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-21 16:40:33,866 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 16:40:34,000 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-21 16:40:34,003 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 16:40:34,012 INFO  L134       CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-08-21 16:40:34,013 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1353279747]
[2020-08-21 16:40:34,013 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-08-21 16:40:34,014 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6
[2020-08-21 16:40:34,014 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699589832]
[2020-08-21 16:40:34,015 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 6 states
[2020-08-21 16:40:34,016 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-21 16:40:34,016 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2020-08-21 16:40:34,017 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30
[2020-08-21 16:40:34,017 INFO  L87              Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 6 states.
[2020-08-21 16:40:38,271 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-21 16:40:38,274 INFO  L93              Difference]: Finished difference Result 29 states and 29 transitions.
[2020-08-21 16:40:38,275 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2020-08-21 16:40:38,275 INFO  L78                 Accepts]: Start accepts. Automaton has 6 states. Word has length 17
[2020-08-21 16:40:38,276 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-21 16:40:38,276 INFO  L225             Difference]: With dead ends: 29
[2020-08-21 16:40:38,277 INFO  L226             Difference]: Without dead ends: 26
[2020-08-21 16:40:38,278 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72
[2020-08-21 16:40:38,278 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 26 states.
[2020-08-21 16:40:38,287 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 23.
[2020-08-21 16:40:38,287 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 23 states.
[2020-08-21 16:40:38,288 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions.
[2020-08-21 16:40:38,289 INFO  L78                 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 17
[2020-08-21 16:40:38,289 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-21 16:40:38,289 INFO  L479      AbstractCegarLoop]: Abstraction has 23 states and 23 transitions.
[2020-08-21 16:40:38,289 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 6 states.
[2020-08-21 16:40:38,289 INFO  L276                IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions.
[2020-08-21 16:40:38,292 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 23
[2020-08-21 16:40:38,293 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-21 16:40:38,294 INFO  L422         BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-08-21 16:40:38,294 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2020-08-21 16:40:38,294 INFO  L427      AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-21 16:40:38,295 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-21 16:40:38,295 INFO  L82        PathProgramCache]: Analyzing trace with hash 491744683, now seen corresponding path program 2 times
[2020-08-21 16:40:38,296 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-21 16:40:38,297 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [273373748]
[2020-08-21 16:40:38,297 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-21 16:40:38,380 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 16:40:38,539 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-21 16:40:38,542 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 16:40:38,550 INFO  L134       CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-08-21 16:40:38,550 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [273373748]
[2020-08-21 16:40:38,551 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-08-21 16:40:38,551 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7
[2020-08-21 16:40:38,551 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484331506]
[2020-08-21 16:40:38,552 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 7 states
[2020-08-21 16:40:38,552 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-21 16:40:38,553 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2020-08-21 16:40:38,553 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2020-08-21 16:40:38,553 INFO  L87              Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 7 states.
[2020-08-21 16:40:44,843 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-21 16:40:44,844 INFO  L93              Difference]: Finished difference Result 34 states and 34 transitions.
[2020-08-21 16:40:44,844 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. 
[2020-08-21 16:40:44,845 INFO  L78                 Accepts]: Start accepts. Automaton has 7 states. Word has length 22
[2020-08-21 16:40:44,845 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-21 16:40:44,846 INFO  L225             Difference]: With dead ends: 34
[2020-08-21 16:40:44,846 INFO  L226             Difference]: Without dead ends: 31
[2020-08-21 16:40:44,847 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110
[2020-08-21 16:40:44,848 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 31 states.
[2020-08-21 16:40:44,852 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 28.
[2020-08-21 16:40:44,853 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 28 states.
[2020-08-21 16:40:44,854 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions.
[2020-08-21 16:40:44,854 INFO  L78                 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 22
[2020-08-21 16:40:44,854 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-21 16:40:44,854 INFO  L479      AbstractCegarLoop]: Abstraction has 28 states and 28 transitions.
[2020-08-21 16:40:44,854 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 7 states.
[2020-08-21 16:40:44,855 INFO  L276                IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions.
[2020-08-21 16:40:44,855 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 28
[2020-08-21 16:40:44,856 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-21 16:40:44,856 INFO  L422         BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-08-21 16:40:44,856 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2020-08-21 16:40:44,856 INFO  L427      AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-21 16:40:44,856 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-21 16:40:44,857 INFO  L82        PathProgramCache]: Analyzing trace with hash 161258737, now seen corresponding path program 3 times
[2020-08-21 16:40:44,857 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-21 16:40:44,857 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2044591342]
[2020-08-21 16:40:44,857 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-21 16:40:44,896 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 16:40:45,099 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-21 16:40:45,102 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 16:40:45,117 INFO  L134       CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-08-21 16:40:45,117 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2044591342]
[2020-08-21 16:40:45,118 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-08-21 16:40:45,118 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8
[2020-08-21 16:40:45,120 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179110212]
[2020-08-21 16:40:45,121 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 8 states
[2020-08-21 16:40:45,122 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-21 16:40:45,122 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2020-08-21 16:40:45,123 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56
[2020-08-21 16:40:45,124 INFO  L87              Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 8 states.
[2020-08-21 16:40:53,475 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-21 16:40:53,475 INFO  L93              Difference]: Finished difference Result 39 states and 39 transitions.
[2020-08-21 16:40:53,476 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. 
[2020-08-21 16:40:53,476 INFO  L78                 Accepts]: Start accepts. Automaton has 8 states. Word has length 27
[2020-08-21 16:40:53,476 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-21 16:40:53,477 INFO  L225             Difference]: With dead ends: 39
[2020-08-21 16:40:53,477 INFO  L226             Difference]: Without dead ends: 36
[2020-08-21 16:40:53,480 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156
[2020-08-21 16:40:53,481 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 36 states.
[2020-08-21 16:40:53,491 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33.
[2020-08-21 16:40:53,494 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 33 states.
[2020-08-21 16:40:53,495 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions.
[2020-08-21 16:40:53,495 INFO  L78                 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 27
[2020-08-21 16:40:53,496 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-21 16:40:53,496 INFO  L479      AbstractCegarLoop]: Abstraction has 33 states and 33 transitions.
[2020-08-21 16:40:53,498 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 8 states.
[2020-08-21 16:40:53,498 INFO  L276                IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions.
[2020-08-21 16:40:53,499 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 33
[2020-08-21 16:40:53,499 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-21 16:40:53,499 INFO  L422         BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-08-21 16:40:53,501 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3
[2020-08-21 16:40:53,502 INFO  L427      AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-21 16:40:53,502 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-21 16:40:53,502 INFO  L82        PathProgramCache]: Analyzing trace with hash 1890060651, now seen corresponding path program 4 times
[2020-08-21 16:40:53,502 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-21 16:40:53,503 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1610051414]
[2020-08-21 16:40:53,503 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-21 16:40:53,560 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 16:40:53,766 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-21 16:40:53,769 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 16:40:53,776 INFO  L134       CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-08-21 16:40:53,776 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1610051414]
[2020-08-21 16:40:53,776 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-08-21 16:40:53,777 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9
[2020-08-21 16:40:53,777 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700681189]
[2020-08-21 16:40:53,777 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 9 states
[2020-08-21 16:40:53,778 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-21 16:40:53,778 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants.
[2020-08-21 16:40:53,778 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72
[2020-08-21 16:40:53,778 INFO  L87              Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 9 states.
[2020-08-21 16:41:04,169 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-21 16:41:04,171 INFO  L93              Difference]: Finished difference Result 44 states and 44 transitions.
[2020-08-21 16:41:04,171 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2020-08-21 16:41:04,172 INFO  L78                 Accepts]: Start accepts. Automaton has 9 states. Word has length 32
[2020-08-21 16:41:04,172 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-21 16:41:04,174 INFO  L225             Difference]: With dead ends: 44
[2020-08-21 16:41:04,174 INFO  L226             Difference]: Without dead ends: 41
[2020-08-21 16:41:04,174 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210
[2020-08-21 16:41:04,175 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 41 states.
[2020-08-21 16:41:04,180 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 38.
[2020-08-21 16:41:04,180 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 38 states.
[2020-08-21 16:41:04,181 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions.
[2020-08-21 16:41:04,182 INFO  L78                 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 32
[2020-08-21 16:41:04,182 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-21 16:41:04,182 INFO  L479      AbstractCegarLoop]: Abstraction has 38 states and 38 transitions.
[2020-08-21 16:41:04,182 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 9 states.
[2020-08-21 16:41:04,182 INFO  L276                IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions.
[2020-08-21 16:41:04,183 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 38
[2020-08-21 16:41:04,184 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-21 16:41:04,184 INFO  L422         BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-08-21 16:41:04,184 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4
[2020-08-21 16:41:04,184 INFO  L427      AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-21 16:41:04,184 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-21 16:41:04,185 INFO  L82        PathProgramCache]: Analyzing trace with hash -737191631, now seen corresponding path program 5 times
[2020-08-21 16:41:04,185 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-21 16:41:04,185 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [444467559]
[2020-08-21 16:41:04,185 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-21 16:41:04,215 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 16:41:04,369 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-21 16:41:04,372 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 16:41:04,380 INFO  L134       CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-08-21 16:41:04,380 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [444467559]
[2020-08-21 16:41:04,380 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-08-21 16:41:04,380 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10
[2020-08-21 16:41:04,381 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122189636]
[2020-08-21 16:41:04,381 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 10 states
[2020-08-21 16:41:04,381 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-21 16:41:04,382 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants.
[2020-08-21 16:41:04,382 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90
[2020-08-21 16:41:04,382 INFO  L87              Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 10 states.
[2020-08-21 16:41:16,762 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-21 16:41:16,762 INFO  L93              Difference]: Finished difference Result 49 states and 49 transitions.
[2020-08-21 16:41:16,762 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. 
[2020-08-21 16:41:16,763 INFO  L78                 Accepts]: Start accepts. Automaton has 10 states. Word has length 37
[2020-08-21 16:41:16,763 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-21 16:41:16,764 INFO  L225             Difference]: With dead ends: 49
[2020-08-21 16:41:16,764 INFO  L226             Difference]: Without dead ends: 46
[2020-08-21 16:41:16,764 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272
[2020-08-21 16:41:16,765 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 46 states.
[2020-08-21 16:41:16,770 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 43.
[2020-08-21 16:41:16,770 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 43 states.
[2020-08-21 16:41:16,771 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions.
[2020-08-21 16:41:16,771 INFO  L78                 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 37
[2020-08-21 16:41:16,771 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-21 16:41:16,771 INFO  L479      AbstractCegarLoop]: Abstraction has 43 states and 43 transitions.
[2020-08-21 16:41:16,772 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 10 states.
[2020-08-21 16:41:16,772 INFO  L276                IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions.
[2020-08-21 16:41:16,773 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 43
[2020-08-21 16:41:16,773 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-21 16:41:16,773 INFO  L422         BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-08-21 16:41:16,773 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5
[2020-08-21 16:41:16,774 INFO  L427      AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-21 16:41:16,774 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-21 16:41:16,774 INFO  L82        PathProgramCache]: Analyzing trace with hash -1715407573, now seen corresponding path program 6 times
[2020-08-21 16:41:16,774 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-21 16:41:16,775 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [273885411]
[2020-08-21 16:41:16,775 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-21 16:41:16,864 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 16:41:17,070 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-21 16:41:17,072 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 16:41:17,081 INFO  L134       CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-08-21 16:41:17,082 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [273885411]
[2020-08-21 16:41:17,082 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-08-21 16:41:17,082 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11
[2020-08-21 16:41:17,083 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242290695]
[2020-08-21 16:41:17,083 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 11 states
[2020-08-21 16:41:17,084 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-21 16:41:17,084 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants.
[2020-08-21 16:41:17,084 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110
[2020-08-21 16:41:17,084 INFO  L87              Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 11 states.
[2020-08-21 16:41:31,594 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-21 16:41:31,594 INFO  L93              Difference]: Finished difference Result 54 states and 54 transitions.
[2020-08-21 16:41:31,595 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. 
[2020-08-21 16:41:31,595 INFO  L78                 Accepts]: Start accepts. Automaton has 11 states. Word has length 42
[2020-08-21 16:41:31,595 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-21 16:41:31,596 INFO  L225             Difference]: With dead ends: 54
[2020-08-21 16:41:31,596 INFO  L226             Difference]: Without dead ends: 51
[2020-08-21 16:41:31,597 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342
[2020-08-21 16:41:31,597 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 51 states.
[2020-08-21 16:41:31,603 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 48.
[2020-08-21 16:41:31,603 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 48 states.
[2020-08-21 16:41:31,604 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions.
[2020-08-21 16:41:31,605 INFO  L78                 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 42
[2020-08-21 16:41:31,605 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-21 16:41:31,605 INFO  L479      AbstractCegarLoop]: Abstraction has 48 states and 48 transitions.
[2020-08-21 16:41:31,605 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 11 states.
[2020-08-21 16:41:31,605 INFO  L276                IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions.
[2020-08-21 16:41:31,607 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 48
[2020-08-21 16:41:31,607 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-21 16:41:31,607 INFO  L422         BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-08-21 16:41:31,607 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6
[2020-08-21 16:41:31,607 INFO  L427      AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-21 16:41:31,608 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-21 16:41:31,608 INFO  L82        PathProgramCache]: Analyzing trace with hash -462174863, now seen corresponding path program 7 times
[2020-08-21 16:41:31,608 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-21 16:41:31,608 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [280406741]
[2020-08-21 16:41:31,608 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-21 16:41:31,639 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 16:41:31,822 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-21 16:41:31,823 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 16:41:31,834 INFO  L134       CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-08-21 16:41:31,834 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [280406741]
[2020-08-21 16:41:31,835 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-08-21 16:41:31,835 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12
[2020-08-21 16:41:31,835 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145551806]
[2020-08-21 16:41:31,835 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 12 states
[2020-08-21 16:41:31,836 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-21 16:41:31,836 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants.
[2020-08-21 16:41:31,836 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132
[2020-08-21 16:41:31,836 INFO  L87              Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 12 states.