/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration false -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_4-1.c


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


This is Ultimate 0.1.25-c90d42b
[2020-09-24 14:55:56,757 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2020-09-24 14:55:56,761 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2020-09-24 14:55:56,789 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2020-09-24 14:55:56,790 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2020-09-24 14:55:56,791 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2020-09-24 14:55:56,793 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2020-09-24 14:55:56,795 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2020-09-24 14:55:56,797 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2020-09-24 14:55:56,798 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
[2020-09-24 14:55:56,799 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
[2020-09-24 14:55:56,801 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2020-09-24 14:55:56,801 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2020-09-24 14:55:56,802 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2020-09-24 14:55:56,804 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2020-09-24 14:55:56,805 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2020-09-24 14:55:56,806 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2020-09-24 14:55:56,808 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2020-09-24 14:55:56,810 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2020-09-24 14:55:56,812 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2020-09-24 14:55:56,814 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2020-09-24 14:55:56,815 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2020-09-24 14:55:56,817 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2020-09-24 14:55:56,818 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2020-09-24 14:55:56,821 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2020-09-24 14:55:56,821 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2020-09-24 14:55:56,821 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2020-09-24 14:55:56,822 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2020-09-24 14:55:56,823 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2020-09-24 14:55:56,824 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2020-09-24 14:55:56,824 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2020-09-24 14:55:56,825 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2020-09-24 14:55:56,826 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2020-09-24 14:55:56,827 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2020-09-24 14:55:56,829 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2020-09-24 14:55:56,829 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
[2020-09-24 14:55:56,830 INFO  L184        SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2020-09-24 14:55:56,830 INFO  L184        SettingsManager]: ReqParser provides no preferences, ignoring...
[2020-09-24 14:55:56,830 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
[2020-09-24 14:55:56,831 INFO  L181        SettingsManager]: Resetting Witness Parser preferences to default values
[2020-09-24 14:55:56,832 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2020-09-24 14:55:56,833 INFO  L101        SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf
[2020-09-24 14:55:56,868 INFO  L113        SettingsManager]: Loading preferences was successful
[2020-09-24 14:55:56,868 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2020-09-24 14:55:56,873 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2020-09-24 14:55:56,873 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2020-09-24 14:55:56,873 INFO  L138        SettingsManager]:  * Use SBE=true
[2020-09-24 14:55:56,874 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2020-09-24 14:55:56,874 INFO  L138        SettingsManager]:  * sizeof long=4
[2020-09-24 14:55:56,874 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2020-09-24 14:55:56,874 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2020-09-24 14:55:56,874 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2020-09-24 14:55:56,875 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2020-09-24 14:55:56,875 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2020-09-24 14:55:56,875 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2020-09-24 14:55:56,875 INFO  L138        SettingsManager]:  * sizeof long double=12
[2020-09-24 14:55:56,875 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2020-09-24 14:55:56,877 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2020-09-24 14:55:56,877 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2020-09-24 14:55:56,877 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2020-09-24 14:55:56,877 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2020-09-24 14:55:56,878 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2020-09-24 14:55:56,878 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2020-09-24 14:55:56,878 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-09-24 14:55:56,878 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2020-09-24 14:55:56,879 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2020-09-24 14:55:56,879 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2020-09-24 14:55:56,879 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2020-09-24 14:55:56,879 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-09-24 14:55:56,879 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2020-09-24 14:55:56,879 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2020-09-24 14:55:56,880 INFO  L138        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SingleStatement
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> false
[2020-09-24 14:55:57,342 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2020-09-24 14:55:57,368 INFO  L258   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2020-09-24 14:55:57,372 INFO  L214   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2020-09-24 14:55:57,374 INFO  L271        PluginConnector]: Initializing CDTParser...
[2020-09-24 14:55:57,375 INFO  L275        PluginConnector]: CDTParser initialized
[2020-09-24 14:55:57,376 INFO  L429   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_4-1.c
[2020-09-24 14:55:57,480 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8566bbbc3/2d674fc214154ef0bae1af5b0603f838/FLAG9c6dcaf3f
[2020-09-24 14:55:58,051 INFO  L306              CDTParser]: Found 1 translation units.
[2020-09-24 14:55:58,052 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/fibo_2calls_4-1.c
[2020-09-24 14:55:58,062 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8566bbbc3/2d674fc214154ef0bae1af5b0603f838/FLAG9c6dcaf3f
[2020-09-24 14:55:58,377 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8566bbbc3/2d674fc214154ef0bae1af5b0603f838
[2020-09-24 14:55:58,390 INFO  L296   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2020-09-24 14:55:58,397 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2020-09-24 14:55:58,398 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2020-09-24 14:55:58,398 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2020-09-24 14:55:58,402 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2020-09-24 14:55:58,403 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 02:55:58" (1/1) ...
[2020-09-24 14:55:58,407 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@480dd80e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:55:58, skipping insertion in model container
[2020-09-24 14:55:58,408 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 02:55:58" (1/1) ...
[2020-09-24 14:55:58,416 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2020-09-24 14:55:58,440 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2020-09-24 14:55:58,652 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-09-24 14:55:58,658 INFO  L203         MainTranslator]: Completed pre-run
[2020-09-24 14:55:58,676 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-09-24 14:55:58,691 INFO  L208         MainTranslator]: Completed translation
[2020-09-24 14:55:58,692 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:55:58 WrapperNode
[2020-09-24 14:55:58,692 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2020-09-24 14:55:58,693 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2020-09-24 14:55:58,693 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2020-09-24 14:55:58,693 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2020-09-24 14:55:58,707 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:55:58" (1/1) ...
[2020-09-24 14:55:58,708 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:55:58" (1/1) ...
[2020-09-24 14:55:58,788 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:55:58" (1/1) ...
[2020-09-24 14:55:58,789 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:55:58" (1/1) ...
[2020-09-24 14:55:58,793 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:55:58" (1/1) ...
[2020-09-24 14:55:58,796 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:55:58" (1/1) ...
[2020-09-24 14:55:58,797 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:55:58" (1/1) ...
[2020-09-24 14:55:58,799 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2020-09-24 14:55:58,799 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2020-09-24 14:55:58,799 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2020-09-24 14:55:58,800 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2020-09-24 14:55:58,801 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:55:58" (1/1) ...
No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-09-24 14:55:58,887 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2020-09-24 14:55:58,887 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2020-09-24 14:55:58,887 INFO  L138     BoogieDeclarations]: Found implementation of procedure fibo1
[2020-09-24 14:55:58,887 INFO  L138     BoogieDeclarations]: Found implementation of procedure fibo2
[2020-09-24 14:55:58,888 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2020-09-24 14:55:58,888 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int
[2020-09-24 14:55:58,888 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2020-09-24 14:55:58,888 INFO  L130     BoogieDeclarations]: Found specification of procedure fibo1
[2020-09-24 14:55:58,888 INFO  L130     BoogieDeclarations]: Found specification of procedure fibo2
[2020-09-24 14:55:58,889 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2020-09-24 14:55:58,889 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2020-09-24 14:55:58,889 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2020-09-24 14:55:59,140 INFO  L290             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2020-09-24 14:55:59,141 INFO  L295             CfgBuilder]: Removed 0 assume(true) statements.
[2020-09-24 14:55:59,146 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 02:55:59 BoogieIcfgContainer
[2020-09-24 14:55:59,147 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2020-09-24 14:55:59,149 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2020-09-24 14:55:59,149 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2020-09-24 14:55:59,153 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2020-09-24 14:55:59,153 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 02:55:58" (1/3) ...
[2020-09-24 14:55:59,154 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36b0519b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 02:55:59, skipping insertion in model container
[2020-09-24 14:55:59,155 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:55:58" (2/3) ...
[2020-09-24 14:55:59,155 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36b0519b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 02:55:59, skipping insertion in model container
[2020-09-24 14:55:59,155 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 02:55:59" (3/3) ...
[2020-09-24 14:55:59,157 INFO  L109   eAbstractionObserver]: Analyzing ICFG fibo_2calls_4-1.c
[2020-09-24 14:55:59,175 INFO  L157   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION
[2020-09-24 14:55:59,189 INFO  L169   ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2020-09-24 14:55:59,214 INFO  L251      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2020-09-24 14:55:59,252 INFO  L375      AbstractCegarLoop]: Interprodecural is true
[2020-09-24 14:55:59,252 INFO  L376      AbstractCegarLoop]: Hoare is true
[2020-09-24 14:55:59,252 INFO  L377      AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation
[2020-09-24 14:55:59,253 INFO  L378      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2020-09-24 14:55:59,253 INFO  L379      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2020-09-24 14:55:59,253 INFO  L380      AbstractCegarLoop]: Difference is false
[2020-09-24 14:55:59,253 INFO  L381      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2020-09-24 14:55:59,253 INFO  L385      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2020-09-24 14:55:59,280 INFO  L276                IsEmpty]: Start isEmpty. Operand 45 states.
[2020-09-24 14:55:59,296 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 17
[2020-09-24 14:55:59,296 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-24 14:55:59,297 INFO  L422         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-24 14:55:59,298 INFO  L427      AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 14:55:59,307 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 14:55:59,307 INFO  L82        PathProgramCache]: Analyzing trace with hash -1089710179, now seen corresponding path program 1 times
[2020-09-24 14:55:59,319 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 14:55:59,320 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [99382455]
[2020-09-24 14:55:59,320 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 14:55:59,428 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 14:55:59,514 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-24 14:55:59,515 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 14:55:59,523 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5
[2020-09-24 14:55:59,535 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 14:55:59,603 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-09-24 14:55:59,605 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [99382455]
[2020-09-24 14:55:59,609 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-09-24 14:55:59,609 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2020-09-24 14:55:59,610 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794188422]
[2020-09-24 14:55:59,617 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 5 states
[2020-09-24 14:55:59,617 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-24 14:55:59,631 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2020-09-24 14:55:59,632 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2020-09-24 14:55:59,635 INFO  L87              Difference]: Start difference. First operand 45 states. Second operand 5 states.
[2020-09-24 14:55:59,768 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-24 14:55:59,769 INFO  L93              Difference]: Finished difference Result 58 states and 67 transitions.
[2020-09-24 14:55:59,770 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2020-09-24 14:55:59,771 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 16
[2020-09-24 14:55:59,772 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-24 14:55:59,784 INFO  L225             Difference]: With dead ends: 58
[2020-09-24 14:55:59,784 INFO  L226             Difference]: Without dead ends: 42
[2020-09-24 14:55:59,788 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30
[2020-09-24 14:55:59,806 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 42 states.
[2020-09-24 14:55:59,838 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42.
[2020-09-24 14:55:59,840 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 42 states.
[2020-09-24 14:55:59,842 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 49 transitions.
[2020-09-24 14:55:59,845 INFO  L78                 Accepts]: Start accepts. Automaton has 42 states and 49 transitions. Word has length 16
[2020-09-24 14:55:59,845 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-09-24 14:55:59,845 INFO  L479      AbstractCegarLoop]: Abstraction has 42 states and 49 transitions.
[2020-09-24 14:55:59,845 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2020-09-24 14:55:59,845 INFO  L276                IsEmpty]: Start isEmpty. Operand 42 states and 49 transitions.
[2020-09-24 14:55:59,847 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 18
[2020-09-24 14:55:59,848 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-24 14:55:59,848 INFO  L422         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-24 14:55:59,848 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2020-09-24 14:55:59,849 INFO  L427      AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 14:55:59,849 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 14:55:59,849 INFO  L82        PathProgramCache]: Analyzing trace with hash -653728005, now seen corresponding path program 1 times
[2020-09-24 14:55:59,850 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 14:55:59,850 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [58887337]
[2020-09-24 14:55:59,850 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 14:55:59,861 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 14:55:59,881 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-24 14:55:59,883 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 14:55:59,886 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5
[2020-09-24 14:55:59,892 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 14:55:59,926 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-09-24 14:55:59,927 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [58887337]
[2020-09-24 14:55:59,928 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-09-24 14:55:59,928 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2020-09-24 14:55:59,928 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96185758]
[2020-09-24 14:55:59,930 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 5 states
[2020-09-24 14:55:59,931 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-24 14:55:59,931 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2020-09-24 14:55:59,932 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2020-09-24 14:55:59,932 INFO  L87              Difference]: Start difference. First operand 42 states and 49 transitions. Second operand 5 states.
[2020-09-24 14:56:00,015 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-24 14:56:00,015 INFO  L93              Difference]: Finished difference Result 50 states and 58 transitions.
[2020-09-24 14:56:00,016 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2020-09-24 14:56:00,016 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 17
[2020-09-24 14:56:00,017 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-24 14:56:00,018 INFO  L225             Difference]: With dead ends: 50
[2020-09-24 14:56:00,019 INFO  L226             Difference]: Without dead ends: 44
[2020-09-24 14:56:00,020 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30
[2020-09-24 14:56:00,021 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 44 states.
[2020-09-24 14:56:00,029 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42.
[2020-09-24 14:56:00,029 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 42 states.
[2020-09-24 14:56:00,031 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 49 transitions.
[2020-09-24 14:56:00,032 INFO  L78                 Accepts]: Start accepts. Automaton has 42 states and 49 transitions. Word has length 17
[2020-09-24 14:56:00,032 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-09-24 14:56:00,032 INFO  L479      AbstractCegarLoop]: Abstraction has 42 states and 49 transitions.
[2020-09-24 14:56:00,033 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2020-09-24 14:56:00,033 INFO  L276                IsEmpty]: Start isEmpty. Operand 42 states and 49 transitions.
[2020-09-24 14:56:00,035 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 34
[2020-09-24 14:56:00,035 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-24 14:56:00,035 INFO  L422         BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-24 14:56:00,036 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2020-09-24 14:56:00,036 INFO  L427      AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 14:56:00,036 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 14:56:00,037 INFO  L82        PathProgramCache]: Analyzing trace with hash -1617834856, now seen corresponding path program 1 times
[2020-09-24 14:56:00,037 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 14:56:00,037 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1047974860]
[2020-09-24 14:56:00,038 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 14:56:00,054 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 14:56:00,097 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-24 14:56:00,099 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 14:56:00,101 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5
[2020-09-24 14:56:00,116 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 14:56:00,151 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-09-24 14:56:00,156 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 14:56:00,185 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10
[2020-09-24 14:56:00,188 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 14:56:00,195 INFO  L134       CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2020-09-24 14:56:00,196 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1047974860]
[2020-09-24 14:56:00,196 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-09-24 14:56:00,196 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7
[2020-09-24 14:56:00,196 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105104398]
[2020-09-24 14:56:00,197 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 7 states
[2020-09-24 14:56:00,197 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-24 14:56:00,198 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2020-09-24 14:56:00,198 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42
[2020-09-24 14:56:00,198 INFO  L87              Difference]: Start difference. First operand 42 states and 49 transitions. Second operand 7 states.
[2020-09-24 14:56:00,291 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-24 14:56:00,292 INFO  L93              Difference]: Finished difference Result 82 states and 102 transitions.
[2020-09-24 14:56:00,292 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2020-09-24 14:56:00,293 INFO  L78                 Accepts]: Start accepts. Automaton has 7 states. Word has length 33
[2020-09-24 14:56:00,293 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-24 14:56:00,295 INFO  L225             Difference]: With dead ends: 82
[2020-09-24 14:56:00,295 INFO  L226             Difference]: Without dead ends: 46
[2020-09-24 14:56:00,297 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56
[2020-09-24 14:56:00,297 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 46 states.
[2020-09-24 14:56:00,305 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 44.
[2020-09-24 14:56:00,305 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 44 states.
[2020-09-24 14:56:00,309 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 51 transitions.
[2020-09-24 14:56:00,310 INFO  L78                 Accepts]: Start accepts. Automaton has 44 states and 51 transitions. Word has length 33
[2020-09-24 14:56:00,310 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-09-24 14:56:00,310 INFO  L479      AbstractCegarLoop]: Abstraction has 44 states and 51 transitions.
[2020-09-24 14:56:00,310 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 7 states.
[2020-09-24 14:56:00,311 INFO  L276                IsEmpty]: Start isEmpty. Operand 44 states and 51 transitions.
[2020-09-24 14:56:00,313 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 35
[2020-09-24 14:56:00,313 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-24 14:56:00,313 INFO  L422         BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-24 14:56:00,313 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2020-09-24 14:56:00,314 INFO  L427      AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 14:56:00,314 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 14:56:00,315 INFO  L82        PathProgramCache]: Analyzing trace with hash 887160861, now seen corresponding path program 1 times
[2020-09-24 14:56:00,315 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 14:56:00,315 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1178572710]
[2020-09-24 14:56:00,316 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 14:56:00,328 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 14:56:00,356 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-24 14:56:00,357 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 14:56:00,359 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5
[2020-09-24 14:56:00,381 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 14:56:00,437 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-09-24 14:56:00,441 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 14:56:00,476 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11
[2020-09-24 14:56:00,479 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 14:56:00,490 INFO  L134       CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2020-09-24 14:56:00,491 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1178572710]
[2020-09-24 14:56:00,491 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-09-24 14:56:00,491 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7
[2020-09-24 14:56:00,492 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483688362]
[2020-09-24 14:56:00,493 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 7 states
[2020-09-24 14:56:00,493 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-24 14:56:00,493 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2020-09-24 14:56:00,494 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2020-09-24 14:56:00,494 INFO  L87              Difference]: Start difference. First operand 44 states and 51 transitions. Second operand 7 states.
[2020-09-24 14:56:00,705 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-24 14:56:00,706 INFO  L93              Difference]: Finished difference Result 74 states and 94 transitions.
[2020-09-24 14:56:00,706 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. 
[2020-09-24 14:56:00,707 INFO  L78                 Accepts]: Start accepts. Automaton has 7 states. Word has length 34
[2020-09-24 14:56:00,707 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-24 14:56:00,709 INFO  L225             Difference]: With dead ends: 74
[2020-09-24 14:56:00,710 INFO  L226             Difference]: Without dead ends: 68
[2020-09-24 14:56:00,711 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72
[2020-09-24 14:56:00,711 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 68 states.
[2020-09-24 14:56:00,722 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 66.
[2020-09-24 14:56:00,723 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 66 states.
[2020-09-24 14:56:00,725 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 83 transitions.
[2020-09-24 14:56:00,726 INFO  L78                 Accepts]: Start accepts. Automaton has 66 states and 83 transitions. Word has length 34
[2020-09-24 14:56:00,726 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-09-24 14:56:00,727 INFO  L479      AbstractCegarLoop]: Abstraction has 66 states and 83 transitions.
[2020-09-24 14:56:00,727 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 7 states.
[2020-09-24 14:56:00,727 INFO  L276                IsEmpty]: Start isEmpty. Operand 66 states and 83 transitions.
[2020-09-24 14:56:00,730 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 51
[2020-09-24 14:56:00,730 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-24 14:56:00,730 INFO  L422         BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-24 14:56:00,731 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3
[2020-09-24 14:56:00,731 INFO  L427      AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 14:56:00,731 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 14:56:00,732 INFO  L82        PathProgramCache]: Analyzing trace with hash 1875452576, now seen corresponding path program 1 times
[2020-09-24 14:56:00,732 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 14:56:00,732 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1460311743]
[2020-09-24 14:56:00,733 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 14:56:00,748 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 14:56:00,776 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-24 14:56:00,777 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 14:56:00,779 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5
[2020-09-24 14:56:00,787 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 14:56:00,812 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-09-24 14:56:00,825 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 14:56:00,862 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-09-24 14:56:00,865 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 14:56:00,886 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10
[2020-09-24 14:56:00,887 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 14:56:00,891 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27
[2020-09-24 14:56:00,893 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 14:56:00,902 INFO  L134       CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked.
[2020-09-24 14:56:00,902 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1460311743]
[2020-09-24 14:56:00,903 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-09-24 14:56:00,903 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6
[2020-09-24 14:56:00,903 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654985609]
[2020-09-24 14:56:00,904 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 6 states
[2020-09-24 14:56:00,904 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-24 14:56:00,904 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2020-09-24 14:56:00,905 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30
[2020-09-24 14:56:00,905 INFO  L87              Difference]: Start difference. First operand 66 states and 83 transitions. Second operand 6 states.
[2020-09-24 14:56:00,986 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-24 14:56:00,986 INFO  L93              Difference]: Finished difference Result 130 states and 178 transitions.
[2020-09-24 14:56:00,987 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2020-09-24 14:56:00,987 INFO  L78                 Accepts]: Start accepts. Automaton has 6 states. Word has length 50
[2020-09-24 14:56:00,987 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-24 14:56:00,989 INFO  L225             Difference]: With dead ends: 130
[2020-09-24 14:56:00,989 INFO  L226             Difference]: Without dead ends: 70
[2020-09-24 14:56:00,991 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42
[2020-09-24 14:56:00,992 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 70 states.
[2020-09-24 14:56:01,003 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70.
[2020-09-24 14:56:01,004 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 70 states.
[2020-09-24 14:56:01,006 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 89 transitions.
[2020-09-24 14:56:01,006 INFO  L78                 Accepts]: Start accepts. Automaton has 70 states and 89 transitions. Word has length 50
[2020-09-24 14:56:01,006 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-09-24 14:56:01,007 INFO  L479      AbstractCegarLoop]: Abstraction has 70 states and 89 transitions.
[2020-09-24 14:56:01,007 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 6 states.
[2020-09-24 14:56:01,007 INFO  L276                IsEmpty]: Start isEmpty. Operand 70 states and 89 transitions.
[2020-09-24 14:56:01,010 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 52
[2020-09-24 14:56:01,010 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-24 14:56:01,010 INFO  L422         BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-24 14:56:01,011 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4
[2020-09-24 14:56:01,011 INFO  L427      AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 14:56:01,011 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 14:56:01,012 INFO  L82        PathProgramCache]: Analyzing trace with hash 104828256, now seen corresponding path program 1 times
[2020-09-24 14:56:01,012 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 14:56:01,012 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1681716453]
[2020-09-24 14:56:01,012 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 14:56:01,022 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 14:56:01,041 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-24 14:56:01,042 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 14:56:01,044 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5
[2020-09-24 14:56:01,053 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 14:56:01,074 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-09-24 14:56:01,080 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 14:56:01,129 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-09-24 14:56:01,132 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 14:56:01,136 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11
[2020-09-24 14:56:01,138 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 14:56:01,142 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28
[2020-09-24 14:56:01,145 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 14:56:01,165 INFO  L134       CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked.
[2020-09-24 14:56:01,165 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1681716453]
[2020-09-24 14:56:01,166 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-09-24 14:56:01,166 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8
[2020-09-24 14:56:01,166 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325284603]
[2020-09-24 14:56:01,167 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 8 states
[2020-09-24 14:56:01,167 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-24 14:56:01,167 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2020-09-24 14:56:01,168 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56
[2020-09-24 14:56:01,168 INFO  L87              Difference]: Start difference. First operand 70 states and 89 transitions. Second operand 8 states.
[2020-09-24 14:56:01,301 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-24 14:56:01,301 INFO  L93              Difference]: Finished difference Result 142 states and 197 transitions.
[2020-09-24 14:56:01,302 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. 
[2020-09-24 14:56:01,302 INFO  L78                 Accepts]: Start accepts. Automaton has 8 states. Word has length 51
[2020-09-24 14:56:01,303 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-24 14:56:01,304 INFO  L225             Difference]: With dead ends: 142
[2020-09-24 14:56:01,304 INFO  L226             Difference]: Without dead ends: 78
[2020-09-24 14:56:01,306 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90
[2020-09-24 14:56:01,307 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 78 states.
[2020-09-24 14:56:01,318 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 72.
[2020-09-24 14:56:01,318 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 72 states.
[2020-09-24 14:56:01,320 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 92 transitions.
[2020-09-24 14:56:01,320 INFO  L78                 Accepts]: Start accepts. Automaton has 72 states and 92 transitions. Word has length 51
[2020-09-24 14:56:01,321 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-09-24 14:56:01,321 INFO  L479      AbstractCegarLoop]: Abstraction has 72 states and 92 transitions.
[2020-09-24 14:56:01,321 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 8 states.
[2020-09-24 14:56:01,321 INFO  L276                IsEmpty]: Start isEmpty. Operand 72 states and 92 transitions.
[2020-09-24 14:56:01,324 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 53
[2020-09-24 14:56:01,324 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-24 14:56:01,324 INFO  L422         BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-24 14:56:01,325 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5
[2020-09-24 14:56:01,325 INFO  L427      AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 14:56:01,325 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 14:56:01,325 INFO  L82        PathProgramCache]: Analyzing trace with hash 1703786405, now seen corresponding path program 1 times
[2020-09-24 14:56:01,326 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 14:56:01,326 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [300643109]
[2020-09-24 14:56:01,326 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 14:56:01,334 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 14:56:01,353 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-24 14:56:01,353 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 14:56:01,355 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5
[2020-09-24 14:56:01,363 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 14:56:01,413 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-09-24 14:56:01,419 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 14:56:01,464 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-09-24 14:56:01,467 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 14:56:01,491 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11
[2020-09-24 14:56:01,493 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 14:56:01,498 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28
[2020-09-24 14:56:01,500 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 14:56:01,516 INFO  L134       CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked.
[2020-09-24 14:56:01,517 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [300643109]
[2020-09-24 14:56:01,519 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-09-24 14:56:01,519 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8
[2020-09-24 14:56:01,520 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46455923]
[2020-09-24 14:56:01,521 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 8 states
[2020-09-24 14:56:01,521 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-24 14:56:01,521 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2020-09-24 14:56:01,523 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56
[2020-09-24 14:56:01,523 INFO  L87              Difference]: Start difference. First operand 72 states and 92 transitions. Second operand 8 states.
[2020-09-24 14:56:01,748 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-24 14:56:01,748 INFO  L93              Difference]: Finished difference Result 118 states and 158 transitions.
[2020-09-24 14:56:01,750 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2020-09-24 14:56:01,750 INFO  L78                 Accepts]: Start accepts. Automaton has 8 states. Word has length 52
[2020-09-24 14:56:01,751 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-24 14:56:01,754 INFO  L225             Difference]: With dead ends: 118
[2020-09-24 14:56:01,754 INFO  L226             Difference]: Without dead ends: 112
[2020-09-24 14:56:01,755 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110
[2020-09-24 14:56:01,756 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 112 states.
[2020-09-24 14:56:01,791 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 106.
[2020-09-24 14:56:01,791 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 106 states.
[2020-09-24 14:56:01,798 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 145 transitions.
[2020-09-24 14:56:01,799 INFO  L78                 Accepts]: Start accepts. Automaton has 106 states and 145 transitions. Word has length 52
[2020-09-24 14:56:01,799 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-09-24 14:56:01,799 INFO  L479      AbstractCegarLoop]: Abstraction has 106 states and 145 transitions.
[2020-09-24 14:56:01,799 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 8 states.
[2020-09-24 14:56:01,800 INFO  L276                IsEmpty]: Start isEmpty. Operand 106 states and 145 transitions.
[2020-09-24 14:56:01,803 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 70
[2020-09-24 14:56:01,803 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-24 14:56:01,803 INFO  L422         BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-24 14:56:01,804 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6
[2020-09-24 14:56:01,804 INFO  L427      AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 14:56:01,804 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 14:56:01,804 INFO  L82        PathProgramCache]: Analyzing trace with hash -521446491, now seen corresponding path program 1 times
[2020-09-24 14:56:01,805 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 14:56:01,805 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2092999753]
[2020-09-24 14:56:01,805 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 14:56:01,817 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 14:56:01,838 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-24 14:56:01,839 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 14:56:01,840 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5
[2020-09-24 14:56:01,849 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 14:56:01,863 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-09-24 14:56:01,870 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 14:56:01,886 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-09-24 14:56:01,890 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 14:56:01,931 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-09-24 14:56:01,933 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 14:56:01,936 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11
[2020-09-24 14:56:01,938 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 14:56:01,942 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28
[2020-09-24 14:56:01,944 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 14:56:01,958 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45
[2020-09-24 14:56:01,960 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 14:56:01,970 INFO  L134       CoverageAnalysis]: Checked inductivity of 48 backedges. 18 proven. 4 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked.
[2020-09-24 14:56:01,970 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2092999753]
[2020-09-24 14:56:01,970 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-09-24 14:56:01,971 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8
[2020-09-24 14:56:01,971 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065495398]
[2020-09-24 14:56:01,972 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 8 states
[2020-09-24 14:56:01,972 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-24 14:56:01,972 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2020-09-24 14:56:01,972 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56
[2020-09-24 14:56:01,973 INFO  L87              Difference]: Start difference. First operand 106 states and 145 transitions. Second operand 8 states.
[2020-09-24 14:56:02,105 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-24 14:56:02,105 INFO  L93              Difference]: Finished difference Result 227 states and 348 transitions.
[2020-09-24 14:56:02,106 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. 
[2020-09-24 14:56:02,106 INFO  L78                 Accepts]: Start accepts. Automaton has 8 states. Word has length 69
[2020-09-24 14:56:02,106 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-24 14:56:02,108 INFO  L225             Difference]: With dead ends: 227
[2020-09-24 14:56:02,109 INFO  L226             Difference]: Without dead ends: 127
[2020-09-24 14:56:02,110 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90
[2020-09-24 14:56:02,111 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 127 states.
[2020-09-24 14:56:02,144 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 115.
[2020-09-24 14:56:02,144 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 115 states.
[2020-09-24 14:56:02,149 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 161 transitions.
[2020-09-24 14:56:02,149 INFO  L78                 Accepts]: Start accepts. Automaton has 115 states and 161 transitions. Word has length 69
[2020-09-24 14:56:02,152 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-09-24 14:56:02,153 INFO  L479      AbstractCegarLoop]: Abstraction has 115 states and 161 transitions.
[2020-09-24 14:56:02,153 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 8 states.
[2020-09-24 14:56:02,153 INFO  L276                IsEmpty]: Start isEmpty. Operand 115 states and 161 transitions.
[2020-09-24 14:56:02,156 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 71
[2020-09-24 14:56:02,156 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-24 14:56:02,156 INFO  L422         BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-24 14:56:02,156 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7
[2020-09-24 14:56:02,157 INFO  L427      AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 14:56:02,157 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 14:56:02,157 INFO  L82        PathProgramCache]: Analyzing trace with hash -439633211, now seen corresponding path program 1 times
[2020-09-24 14:56:02,157 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 14:56:02,159 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1425903620]
[2020-09-24 14:56:02,159 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 14:56:02,178 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 14:56:02,202 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-24 14:56:02,203 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 14:56:02,204 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5
[2020-09-24 14:56:02,215 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 14:56:02,241 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-09-24 14:56:02,247 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 14:56:02,272 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-09-24 14:56:02,279 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 14:56:02,335 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-09-24 14:56:02,337 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 14:56:02,339 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11
[2020-09-24 14:56:02,341 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 14:56:02,344 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28
[2020-09-24 14:56:02,345 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 14:56:02,350 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46
[2020-09-24 14:56:02,351 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 14:56:02,371 INFO  L134       CoverageAnalysis]: Checked inductivity of 50 backedges. 23 proven. 11 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked.
[2020-09-24 14:56:02,371 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1425903620]
[2020-09-24 14:56:02,371 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-09-24 14:56:02,372 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10
[2020-09-24 14:56:02,372 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508829233]
[2020-09-24 14:56:02,373 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 10 states
[2020-09-24 14:56:02,373 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-24 14:56:02,373 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants.
[2020-09-24 14:56:02,374 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90
[2020-09-24 14:56:02,374 INFO  L87              Difference]: Start difference. First operand 115 states and 161 transitions. Second operand 10 states.
[2020-09-24 14:56:02,582 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-24 14:56:02,583 INFO  L93              Difference]: Finished difference Result 257 states and 400 transitions.
[2020-09-24 14:56:02,583 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. 
[2020-09-24 14:56:02,583 INFO  L78                 Accepts]: Start accepts. Automaton has 10 states. Word has length 70
[2020-09-24 14:56:02,584 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-24 14:56:02,586 INFO  L225             Difference]: With dead ends: 257
[2020-09-24 14:56:02,586 INFO  L226             Difference]: Without dead ends: 151
[2020-09-24 14:56:02,588 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182
[2020-09-24 14:56:02,588 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 151 states.
[2020-09-24 14:56:02,617 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 133.
[2020-09-24 14:56:02,617 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 133 states.
[2020-09-24 14:56:02,619 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 191 transitions.
[2020-09-24 14:56:02,620 INFO  L78                 Accepts]: Start accepts. Automaton has 133 states and 191 transitions. Word has length 70
[2020-09-24 14:56:02,620 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-09-24 14:56:02,620 INFO  L479      AbstractCegarLoop]: Abstraction has 133 states and 191 transitions.
[2020-09-24 14:56:02,620 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 10 states.
[2020-09-24 14:56:02,620 INFO  L276                IsEmpty]: Start isEmpty. Operand 133 states and 191 transitions.
[2020-09-24 14:56:02,623 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 106
[2020-09-24 14:56:02,623 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-24 14:56:02,623 INFO  L422         BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-24 14:56:02,623 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8
[2020-09-24 14:56:02,623 INFO  L427      AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 14:56:02,624 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 14:56:02,624 INFO  L82        PathProgramCache]: Analyzing trace with hash 307755032, now seen corresponding path program 2 times
[2020-09-24 14:56:02,624 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 14:56:02,625 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1544075035]
[2020-09-24 14:56:02,625 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 14:56:02,641 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 14:56:02,668 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-24 14:56:02,669 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 14:56:02,670 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5
[2020-09-24 14:56:02,682 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 14:56:02,706 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-09-24 14:56:02,712 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 14:56:02,743 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-09-24 14:56:02,747 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 14:56:02,772 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-09-24 14:56:02,774 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 14:56:02,788 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11
[2020-09-24 14:56:02,789 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 14:56:02,792 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28
[2020-09-24 14:56:02,794 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 14:56:02,798 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46
[2020-09-24 14:56:02,804 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 14:56:02,827 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-09-24 14:56:02,831 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 14:56:02,874 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-09-24 14:56:02,876 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 14:56:02,878 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11
[2020-09-24 14:56:02,880 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 14:56:02,882 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28
[2020-09-24 14:56:02,884 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 14:56:02,906 INFO  L134       CoverageAnalysis]: Checked inductivity of 147 backedges. 36 proven. 59 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked.
[2020-09-24 14:56:02,907 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1544075035]
[2020-09-24 14:56:02,907 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-09-24 14:56:02,907 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12
[2020-09-24 14:56:02,907 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283567571]
[2020-09-24 14:56:02,908 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 12 states
[2020-09-24 14:56:02,908 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-24 14:56:02,909 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants.
[2020-09-24 14:56:02,909 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132
[2020-09-24 14:56:02,909 INFO  L87              Difference]: Start difference. First operand 133 states and 191 transitions. Second operand 12 states.
[2020-09-24 14:56:03,342 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-24 14:56:03,343 INFO  L93              Difference]: Finished difference Result 265 states and 420 transitions.
[2020-09-24 14:56:03,345 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. 
[2020-09-24 14:56:03,345 INFO  L78                 Accepts]: Start accepts. Automaton has 12 states. Word has length 105
[2020-09-24 14:56:03,346 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-24 14:56:03,352 INFO  L225             Difference]: With dead ends: 265
[2020-09-24 14:56:03,353 INFO  L226             Difference]: Without dead ends: 116
[2020-09-24 14:56:03,359 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420
[2020-09-24 14:56:03,360 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 116 states.
[2020-09-24 14:56:03,380 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 103.
[2020-09-24 14:56:03,380 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 103 states.
[2020-09-24 14:56:03,383 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 127 transitions.
[2020-09-24 14:56:03,383 INFO  L78                 Accepts]: Start accepts. Automaton has 103 states and 127 transitions. Word has length 105
[2020-09-24 14:56:03,383 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-09-24 14:56:03,384 INFO  L479      AbstractCegarLoop]: Abstraction has 103 states and 127 transitions.
[2020-09-24 14:56:03,384 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 12 states.
[2020-09-24 14:56:03,384 INFO  L276                IsEmpty]: Start isEmpty. Operand 103 states and 127 transitions.
[2020-09-24 14:56:03,388 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 88
[2020-09-24 14:56:03,389 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-24 14:56:03,389 INFO  L422         BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-24 14:56:03,389 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9
[2020-09-24 14:56:03,393 INFO  L427      AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 14:56:03,393 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 14:56:03,393 INFO  L82        PathProgramCache]: Analyzing trace with hash 1951493560, now seen corresponding path program 1 times
[2020-09-24 14:56:03,394 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 14:56:03,394 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1509139244]
[2020-09-24 14:56:03,394 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 14:56:03,430 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 14:56:03,485 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-24 14:56:03,486 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 14:56:03,488 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5
[2020-09-24 14:56:03,500 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 14:56:03,590 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-09-24 14:56:03,600 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 14:56:03,656 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-09-24 14:56:03,662 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 14:56:03,725 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-09-24 14:56:03,727 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 14:56:03,756 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11
[2020-09-24 14:56:03,758 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 14:56:03,787 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28
[2020-09-24 14:56:03,789 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 14:56:03,800 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46
[2020-09-24 14:56:03,805 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 14:56:03,838 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-09-24 14:56:03,840 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 14:56:03,843 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11
[2020-09-24 14:56:03,855 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 14:56:03,901 INFO  L134       CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked.
[2020-09-24 14:56:03,901 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1509139244]
[2020-09-24 14:56:03,901 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-09-24 14:56:03,901 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17
[2020-09-24 14:56:03,902 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992081603]
[2020-09-24 14:56:03,902 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 17 states
[2020-09-24 14:56:03,903 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-24 14:56:03,903 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants.
[2020-09-24 14:56:03,903 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272
[2020-09-24 14:56:03,903 INFO  L87              Difference]: Start difference. First operand 103 states and 127 transitions. Second operand 17 states.
[2020-09-24 14:56:04,438 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-24 14:56:04,438 INFO  L93              Difference]: Finished difference Result 137 states and 167 transitions.
[2020-09-24 14:56:04,438 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. 
[2020-09-24 14:56:04,439 INFO  L78                 Accepts]: Start accepts. Automaton has 17 states. Word has length 87
[2020-09-24 14:56:04,439 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-24 14:56:04,441 INFO  L225             Difference]: With dead ends: 137
[2020-09-24 14:56:04,441 INFO  L226             Difference]: Without dead ends: 131
[2020-09-24 14:56:04,444 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=95, Invalid=775, Unknown=0, NotChecked=0, Total=870
[2020-09-24 14:56:04,445 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 131 states.
[2020-09-24 14:56:04,453 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 111.
[2020-09-24 14:56:04,453 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 111 states.
[2020-09-24 14:56:04,455 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 137 transitions.
[2020-09-24 14:56:04,455 INFO  L78                 Accepts]: Start accepts. Automaton has 111 states and 137 transitions. Word has length 87
[2020-09-24 14:56:04,456 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-09-24 14:56:04,456 INFO  L479      AbstractCegarLoop]: Abstraction has 111 states and 137 transitions.
[2020-09-24 14:56:04,456 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 17 states.
[2020-09-24 14:56:04,456 INFO  L276                IsEmpty]: Start isEmpty. Operand 111 states and 137 transitions.
[2020-09-24 14:56:04,458 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 89
[2020-09-24 14:56:04,458 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-24 14:56:04,458 INFO  L422         BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-24 14:56:04,458 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10
[2020-09-24 14:56:04,459 INFO  L427      AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 14:56:04,459 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 14:56:04,459 INFO  L82        PathProgramCache]: Analyzing trace with hash -1530276981, now seen corresponding path program 2 times
[2020-09-24 14:56:04,459 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 14:56:04,460 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1602431682]
[2020-09-24 14:56:04,460 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 14:56:04,469 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 14:56:04,490 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-24 14:56:04,491 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 14:56:04,492 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5
[2020-09-24 14:56:04,500 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 14:56:04,509 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-09-24 14:56:04,515 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 14:56:04,521 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-09-24 14:56:04,525 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 14:56:04,535 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-09-24 14:56:04,537 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 14:56:04,554 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11
[2020-09-24 14:56:04,555 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 14:56:04,568 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29
[2020-09-24 14:56:04,569 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 14:56:04,574 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47
[2020-09-24 14:56:04,577 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 14:56:04,581 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-09-24 14:56:04,582 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 14:56:04,584 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11
[2020-09-24 14:56:04,585 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 14:56:04,609 INFO  L134       CoverageAnalysis]: Checked inductivity of 92 backedges. 16 proven. 26 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked.
[2020-09-24 14:56:04,610 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1602431682]
[2020-09-24 14:56:04,610 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-09-24 14:56:04,610 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7
[2020-09-24 14:56:04,610 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279993848]
[2020-09-24 14:56:04,611 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 7 states
[2020-09-24 14:56:04,611 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-24 14:56:04,611 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2020-09-24 14:56:04,612 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2020-09-24 14:56:04,612 INFO  L87              Difference]: Start difference. First operand 111 states and 137 transitions. Second operand 7 states.
[2020-09-24 14:56:04,714 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-24 14:56:04,714 INFO  L93              Difference]: Finished difference Result 197 states and 253 transitions.
[2020-09-24 14:56:04,715 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. 
[2020-09-24 14:56:04,715 INFO  L78                 Accepts]: Start accepts. Automaton has 7 states. Word has length 88
[2020-09-24 14:56:04,715 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-24 14:56:04,716 INFO  L225             Difference]: With dead ends: 197
[2020-09-24 14:56:04,717 INFO  L226             Difference]: Without dead ends: 94
[2020-09-24 14:56:04,718 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90
[2020-09-24 14:56:04,718 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 94 states.
[2020-09-24 14:56:04,726 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94.
[2020-09-24 14:56:04,726 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 94 states.
[2020-09-24 14:56:04,727 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 114 transitions.
[2020-09-24 14:56:04,728 INFO  L78                 Accepts]: Start accepts. Automaton has 94 states and 114 transitions. Word has length 88
[2020-09-24 14:56:04,729 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-09-24 14:56:04,729 INFO  L479      AbstractCegarLoop]: Abstraction has 94 states and 114 transitions.
[2020-09-24 14:56:04,729 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 7 states.
[2020-09-24 14:56:04,729 INFO  L276                IsEmpty]: Start isEmpty. Operand 94 states and 114 transitions.
[2020-09-24 14:56:04,730 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 124
[2020-09-24 14:56:04,730 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-24 14:56:04,731 INFO  L422         BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-24 14:56:04,731 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11
[2020-09-24 14:56:04,731 INFO  L427      AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 14:56:04,731 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 14:56:04,732 INFO  L82        PathProgramCache]: Analyzing trace with hash -1534580400, now seen corresponding path program 2 times
[2020-09-24 14:56:04,732 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 14:56:04,732 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [163017644]
[2020-09-24 14:56:04,732 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 14:56:04,743 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 14:56:04,779 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-24 14:56:04,780 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 14:56:04,781 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5
[2020-09-24 14:56:04,796 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 14:56:04,826 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-09-24 14:56:04,834 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 14:56:04,852 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-09-24 14:56:04,857 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 14:56:04,877 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-09-24 14:56:04,880 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 14:56:04,928 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-09-24 14:56:04,930 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 14:56:04,932 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11
[2020-09-24 14:56:04,933 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 14:56:04,936 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28
[2020-09-24 14:56:04,938 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 14:56:04,941 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46
[2020-09-24 14:56:04,943 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 14:56:04,960 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64
[2020-09-24 14:56:04,965 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 14:56:04,972 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-09-24 14:56:04,973 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 14:56:04,977 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-09-24 14:56:04,978 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 14:56:04,980 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11
[2020-09-24 14:56:04,980 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 14:56:04,982 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28
[2020-09-24 14:56:04,983 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 14:56:05,003 INFO  L134       CoverageAnalysis]: Checked inductivity of 215 backedges. 43 proven. 77 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked.
[2020-09-24 14:56:05,003 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [163017644]
[2020-09-24 14:56:05,004 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-09-24 14:56:05,004 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11
[2020-09-24 14:56:05,004 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640482864]
[2020-09-24 14:56:05,005 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 11 states
[2020-09-24 14:56:05,005 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-24 14:56:05,005 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants.
[2020-09-24 14:56:05,005 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110
[2020-09-24 14:56:05,006 INFO  L87              Difference]: Start difference. First operand 94 states and 114 transitions. Second operand 11 states.
[2020-09-24 14:56:05,251 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-24 14:56:05,251 INFO  L93              Difference]: Finished difference Result 176 states and 223 transitions.
[2020-09-24 14:56:05,252 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. 
[2020-09-24 14:56:05,252 INFO  L78                 Accepts]: Start accepts. Automaton has 11 states. Word has length 123
[2020-09-24 14:56:05,252 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-24 14:56:05,253 INFO  L225             Difference]: With dead ends: 176
[2020-09-24 14:56:05,253 INFO  L226             Difference]: Without dead ends: 0
[2020-09-24 14:56:05,254 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240
[2020-09-24 14:56:05,255 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 0 states.
[2020-09-24 14:56:05,255 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0.
[2020-09-24 14:56:05,255 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 0 states.
[2020-09-24 14:56:05,255 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions.
[2020-09-24 14:56:05,256 INFO  L78                 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 123
[2020-09-24 14:56:05,256 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-09-24 14:56:05,256 INFO  L479      AbstractCegarLoop]: Abstraction has 0 states and 0 transitions.
[2020-09-24 14:56:05,256 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 11 states.
[2020-09-24 14:56:05,256 INFO  L276                IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions.
[2020-09-24 14:56:05,256 INFO  L282                IsEmpty]: Finished isEmpty. No accepting run.
[2020-09-24 14:56:05,257 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12
[2020-09-24 14:56:05,260 INFO  L343    DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.
[2020-09-24 14:56:05,882 WARN  L193               SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 15
[2020-09-24 14:56:06,083 WARN  L193               SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 23
[2020-09-24 14:56:06,090 INFO  L271        CegarLoopResult]: At program point  ULTIMATE.initFINAL(line -1)  the Hoare annotation is:  true
[2020-09-24 14:56:06,090 INFO  L268        CegarLoopResult]: For program point  ULTIMATE.initEXIT(line -1)  no Hoare annotation was computed.
[2020-09-24 14:56:06,090 INFO  L268        CegarLoopResult]: For program point  ULTIMATE.startEXIT(line -1)  no Hoare annotation was computed.
[2020-09-24 14:56:06,090 INFO  L271        CegarLoopResult]: At program point  L-1(line -1)  the Hoare annotation is:  true
[2020-09-24 14:56:06,091 INFO  L271        CegarLoopResult]: At program point  ULTIMATE.startENTRY(line -1)  the Hoare annotation is:  true
[2020-09-24 14:56:06,091 INFO  L268        CegarLoopResult]: For program point  ULTIMATE.startFINAL(line -1)  no Hoare annotation was computed.
[2020-09-24 14:56:06,091 INFO  L268        CegarLoopResult]: For program point  mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 39)  no Hoare annotation was computed.
[2020-09-24 14:56:06,091 INFO  L271        CegarLoopResult]: At program point  mainENTRY(lines 35 42)  the Hoare annotation is:  true
[2020-09-24 14:56:06,091 INFO  L268        CegarLoopResult]: For program point  mainEXIT(lines 35 42)  no Hoare annotation was computed.
[2020-09-24 14:56:06,091 INFO  L268        CegarLoopResult]: For program point  mainFINAL(lines 35 42)  no Hoare annotation was computed.
[2020-09-24 14:56:06,091 INFO  L268        CegarLoopResult]: For program point  L39(line 39)  no Hoare annotation was computed.
[2020-09-24 14:56:06,092 INFO  L268        CegarLoopResult]: For program point  L38(lines 38 40)  no Hoare annotation was computed.
[2020-09-24 14:56:06,092 INFO  L264        CegarLoopResult]: At program point  L37(line 37)  the Hoare annotation is:  (and (<= 4 main_~x~0) (<= main_~x~0 4))
[2020-09-24 14:56:06,092 INFO  L268        CegarLoopResult]: For program point  L37-1(line 37)  no Hoare annotation was computed.
[2020-09-24 14:56:06,092 INFO  L268        CegarLoopResult]: For program point  L38-2(lines 38 40)  no Hoare annotation was computed.
[2020-09-24 14:56:06,092 INFO  L268        CegarLoopResult]: For program point  L37-2(line 37)  no Hoare annotation was computed.
[2020-09-24 14:56:06,092 INFO  L268        CegarLoopResult]: For program point  L37-3(line 37)  no Hoare annotation was computed.
[2020-09-24 14:56:06,092 INFO  L271        CegarLoopResult]: At program point  fibo2ENTRY(lines 17 25)  the Hoare annotation is:  true
[2020-09-24 14:56:06,093 INFO  L264        CegarLoopResult]: At program point  L23(line 23)  the Hoare annotation is:  (and (= fibo2_~n |fibo2_#in~n|) (not (<= |fibo2_#in~n| 1)))
[2020-09-24 14:56:06,093 INFO  L268        CegarLoopResult]: For program point  L23-1(line 23)  no Hoare annotation was computed.
[2020-09-24 14:56:06,093 INFO  L268        CegarLoopResult]: For program point  L21(line 21)  no Hoare annotation was computed.
[2020-09-24 14:56:06,094 INFO  L264        CegarLoopResult]: At program point  L23-2(line 23)  the Hoare annotation is:  (let ((.cse0 (= fibo2_~n |fibo2_#in~n|))) (or (and (<= |fibo2_#t~ret2| 1) .cse0 (<= 1 |fibo2_#t~ret2|) (<= 2 |fibo2_#in~n|) (<= |fibo2_#in~n| 2)) (and (<= 4 fibo2_~n) .cse0)))
[2020-09-24 14:56:06,094 INFO  L268        CegarLoopResult]: For program point  L20(lines 20 24)  no Hoare annotation was computed.
[2020-09-24 14:56:06,094 INFO  L268        CegarLoopResult]: For program point  L23-3(line 23)  no Hoare annotation was computed.
[2020-09-24 14:56:06,094 INFO  L268        CegarLoopResult]: For program point  L19(line 19)  no Hoare annotation was computed.
[2020-09-24 14:56:06,094 INFO  L268        CegarLoopResult]: For program point  L23-4(line 23)  no Hoare annotation was computed.
[2020-09-24 14:56:06,094 INFO  L268        CegarLoopResult]: For program point  L18(lines 18 24)  no Hoare annotation was computed.
[2020-09-24 14:56:06,095 INFO  L268        CegarLoopResult]: For program point  L23-5(line 23)  no Hoare annotation was computed.
[2020-09-24 14:56:06,095 INFO  L268        CegarLoopResult]: For program point  L23-6(line 23)  no Hoare annotation was computed.
[2020-09-24 14:56:06,095 INFO  L268        CegarLoopResult]: For program point  fibo2FINAL(lines 17 25)  no Hoare annotation was computed.
[2020-09-24 14:56:06,095 INFO  L268        CegarLoopResult]: For program point  fibo2EXIT(lines 17 25)  no Hoare annotation was computed.
[2020-09-24 14:56:06,095 INFO  L271        CegarLoopResult]: At program point  fibo1ENTRY(lines 7 15)  the Hoare annotation is:  true
[2020-09-24 14:56:06,095 INFO  L264        CegarLoopResult]: At program point  L13(line 13)  the Hoare annotation is:  (and (not (<= |fibo1_#in~n| 2)) (= fibo1_~n |fibo1_#in~n|))
[2020-09-24 14:56:06,095 INFO  L268        CegarLoopResult]: For program point  L13-1(line 13)  no Hoare annotation was computed.
[2020-09-24 14:56:06,096 INFO  L268        CegarLoopResult]: For program point  L11(line 11)  no Hoare annotation was computed.
[2020-09-24 14:56:06,096 INFO  L264        CegarLoopResult]: At program point  L13-2(line 13)  the Hoare annotation is:  (and (let ((.cse0 (= fibo1_~n |fibo1_#in~n|))) (or (and (<= 4 fibo1_~n) (<= 2 |fibo1_#t~ret0|) (<= |fibo1_#t~ret0| 2) .cse0) (and (<= |fibo1_#in~n| 3) (<= |fibo1_#t~ret0| 1) (<= 1 |fibo1_#t~ret0|) .cse0) (and (<= 5 |fibo1_#in~n|) .cse0))) (not (<= |fibo1_#in~n| 2)))
[2020-09-24 14:56:06,097 INFO  L268        CegarLoopResult]: For program point  fibo1FINAL(lines 7 15)  no Hoare annotation was computed.
[2020-09-24 14:56:06,097 INFO  L268        CegarLoopResult]: For program point  L10(lines 10 14)  no Hoare annotation was computed.
[2020-09-24 14:56:06,097 INFO  L268        CegarLoopResult]: For program point  L13-3(line 13)  no Hoare annotation was computed.
[2020-09-24 14:56:06,097 INFO  L268        CegarLoopResult]: For program point  L9(line 9)  no Hoare annotation was computed.
[2020-09-24 14:56:06,097 INFO  L268        CegarLoopResult]: For program point  L13-4(line 13)  no Hoare annotation was computed.
[2020-09-24 14:56:06,097 INFO  L268        CegarLoopResult]: For program point  L8(lines 8 14)  no Hoare annotation was computed.
[2020-09-24 14:56:06,097 INFO  L268        CegarLoopResult]: For program point  L13-5(line 13)  no Hoare annotation was computed.
[2020-09-24 14:56:06,098 INFO  L268        CegarLoopResult]: For program point  L13-6(line 13)  no Hoare annotation was computed.
[2020-09-24 14:56:06,098 INFO  L268        CegarLoopResult]: For program point  fibo1EXIT(lines 7 15)  no Hoare annotation was computed.
[2020-09-24 14:56:06,110 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.09 02:56:06 BoogieIcfgContainer
[2020-09-24 14:56:06,111 INFO  L132        PluginConnector]: ------------------------ END TraceAbstraction----------------------------
[2020-09-24 14:56:06,116 INFO  L168              Benchmark]: Toolchain (without parser) took 7721.77 ms. Allocated memory was 137.9 MB in the beginning and 323.0 MB in the end (delta: 185.1 MB). Free memory was 101.2 MB in the beginning and 237.4 MB in the end (delta: -136.2 MB). Peak memory consumption was 167.9 MB. Max. memory is 7.1 GB.
[2020-09-24 14:56:06,117 INFO  L168              Benchmark]: CDTParser took 0.62 ms. Allocated memory is still 137.9 MB. Free memory was 119.4 MB in the beginning and 119.2 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB.
[2020-09-24 14:56:06,118 INFO  L168              Benchmark]: CACSL2BoogieTranslator took 294.64 ms. Allocated memory is still 137.9 MB. Free memory was 100.6 MB in the beginning and 91.0 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB.
[2020-09-24 14:56:06,119 INFO  L168              Benchmark]: Boogie Preprocessor took 106.22 ms. Allocated memory was 137.9 MB in the beginning and 200.3 MB in the end (delta: 62.4 MB). Free memory was 91.0 MB in the beginning and 179.4 MB in the end (delta: -88.4 MB). Peak memory consumption was 12.8 MB. Max. memory is 7.1 GB.
[2020-09-24 14:56:06,125 INFO  L168              Benchmark]: RCFGBuilder took 347.98 ms. Allocated memory is still 200.3 MB. Free memory was 179.4 MB in the beginning and 164.6 MB in the end (delta: 14.8 MB). Peak memory consumption was 14.8 MB. Max. memory is 7.1 GB.
[2020-09-24 14:56:06,130 INFO  L168              Benchmark]: TraceAbstraction took 6962.11 ms. Allocated memory was 200.3 MB in the beginning and 323.0 MB in the end (delta: 122.7 MB). Free memory was 163.9 MB in the beginning and 237.4 MB in the end (delta: -73.5 MB). Peak memory consumption was 168.2 MB. Max. memory is 7.1 GB.
[2020-09-24 14:56:06,138 INFO  L336   ainManager$Toolchain]: #######################  End [Toolchain 1] #######################
 --- Results ---
 * Results from de.uni_freiburg.informatik.ultimate.core:
  - StatisticsResult: Toolchain Benchmarks
    Benchmark results are:
 * CDTParser took 0.62 ms. Allocated memory is still 137.9 MB. Free memory was 119.4 MB in the beginning and 119.2 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB.
 * CACSL2BoogieTranslator took 294.64 ms. Allocated memory is still 137.9 MB. Free memory was 100.6 MB in the beginning and 91.0 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB.
 * Boogie Preprocessor took 106.22 ms. Allocated memory was 137.9 MB in the beginning and 200.3 MB in the end (delta: 62.4 MB). Free memory was 91.0 MB in the beginning and 179.4 MB in the end (delta: -88.4 MB). Peak memory consumption was 12.8 MB. Max. memory is 7.1 GB.
 * RCFGBuilder took 347.98 ms. Allocated memory is still 200.3 MB. Free memory was 179.4 MB in the beginning and 164.6 MB in the end (delta: 14.8 MB). Peak memory consumption was 14.8 MB. Max. memory is 7.1 GB.
 * TraceAbstraction took 6962.11 ms. Allocated memory was 200.3 MB in the beginning and 323.0 MB in the end (delta: 122.7 MB). Free memory was 163.9 MB in the beginning and 237.4 MB in the end (delta: -73.5 MB). Peak memory consumption was 168.2 MB. Max. memory is 7.1 GB.
 * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction:
  - PositiveResult [Line: 39]: call of __VERIFIER_error() unreachable
    For all program executions holds that call of __VERIFIER_error() unreachable at this location
  - AllSpecificationsHoldResult: All specifications hold
    1 specifications checked. All of them hold
  - StatisticsResult: Ultimate Automizer benchmark data
    CFG has 5 procedures, 45 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 6.0s, OverallIterations: 13, TraceHistogramMax: 7, AutomataDifference: 2.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.8s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 588 SDtfs, 515 SDslu, 2882 SDs, 0 SdLazy, 1540 SolverSat, 149 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 359 GetRequests, 227 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 1.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=133occurred in iteration=9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 13 MinimizatonAttempts, 81 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 11 LocationsWithAnnotation, 344 PreInvPairs, 398 NumberOfFragments, 92 HoareAnnotationTreeSize, 344 FomulaSimplifications, 448 FormulaSimplificationTreeSizeReduction, 0.3s HoareSimplificationTime, 11 FomulaSimplificationsInter, 701 FormulaSimplificationTreeSizeReductionInter, 0.4s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 2.4s InterpolantComputationTime, 795 NumberOfCodeBlocks, 795 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 782 ConstructedInterpolants, 0 QuantifiedInterpolants, 125112 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 13 InterpolantComputations, 2 PerfectInterpolantSequences, 465/701 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available
RESULT: Ultimate proved your program to be correct!
Received shutdown request...