/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=BIGGEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_6-1.c


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


This is Ultimate 0.1.25-177f698
[2020-08-21 17:19:31,063 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2020-08-21 17:19:31,066 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2020-08-21 17:19:31,095 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2020-08-21 17:19:31,095 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2020-08-21 17:19:31,096 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2020-08-21 17:19:31,098 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2020-08-21 17:19:31,100 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2020-08-21 17:19:31,101 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2020-08-21 17:19:31,102 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
[2020-08-21 17:19:31,103 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
[2020-08-21 17:19:31,104 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2020-08-21 17:19:31,104 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2020-08-21 17:19:31,105 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2020-08-21 17:19:31,106 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2020-08-21 17:19:31,107 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2020-08-21 17:19:31,108 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2020-08-21 17:19:31,109 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2020-08-21 17:19:31,111 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2020-08-21 17:19:31,113 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2020-08-21 17:19:31,114 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2020-08-21 17:19:31,115 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2020-08-21 17:19:31,116 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2020-08-21 17:19:31,117 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2020-08-21 17:19:31,119 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2020-08-21 17:19:31,120 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2020-08-21 17:19:31,120 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2020-08-21 17:19:31,121 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2020-08-21 17:19:31,121 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2020-08-21 17:19:31,122 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2020-08-21 17:19:31,122 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2020-08-21 17:19:31,123 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2020-08-21 17:19:31,124 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2020-08-21 17:19:31,124 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2020-08-21 17:19:31,125 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2020-08-21 17:19:31,126 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
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[2020-08-21 17:19:31,127 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
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[2020-08-21 17:19:31,128 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2020-08-21 17:19:31,129 INFO  L101        SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf
[2020-08-21 17:19:31,152 INFO  L113        SettingsManager]: Loading preferences was successful
[2020-08-21 17:19:31,152 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2020-08-21 17:19:31,153 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2020-08-21 17:19:31,154 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2020-08-21 17:19:31,154 INFO  L138        SettingsManager]:  * Use SBE=true
[2020-08-21 17:19:31,154 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2020-08-21 17:19:31,154 INFO  L138        SettingsManager]:  * sizeof long=4
[2020-08-21 17:19:31,155 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2020-08-21 17:19:31,155 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2020-08-21 17:19:31,155 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2020-08-21 17:19:31,155 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2020-08-21 17:19:31,155 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2020-08-21 17:19:31,156 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2020-08-21 17:19:31,156 INFO  L138        SettingsManager]:  * sizeof long double=12
[2020-08-21 17:19:31,156 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2020-08-21 17:19:31,156 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2020-08-21 17:19:31,156 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2020-08-21 17:19:31,157 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2020-08-21 17:19:31,157 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2020-08-21 17:19:31,157 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2020-08-21 17:19:31,157 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2020-08-21 17:19:31,157 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-08-21 17:19:31,158 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2020-08-21 17:19:31,158 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2020-08-21 17:19:31,158 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2020-08-21 17:19:31,158 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2020-08-21 17:19:31,159 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-08-21 17:19:31,159 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2020-08-21 17:19:31,159 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2020-08-21 17:19:31,159 INFO  L138        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;
[2020-08-21 17:19:31,483 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2020-08-21 17:19:31,495 INFO  L258   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2020-08-21 17:19:31,499 INFO  L214   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2020-08-21 17:19:31,500 INFO  L271        PluginConnector]: Initializing CDTParser...
[2020-08-21 17:19:31,501 INFO  L275        PluginConnector]: CDTParser initialized
[2020-08-21 17:19:31,501 INFO  L429   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_6-1.c
[2020-08-21 17:19:31,577 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e97cb1795/1ce5b0b363df4d9481969fbea993e379/FLAGd5ac69f28
[2020-08-21 17:19:32,097 INFO  L306              CDTParser]: Found 1 translation units.
[2020-08-21 17:19:32,097 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/fibo_2calls_6-1.c
[2020-08-21 17:19:32,106 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e97cb1795/1ce5b0b363df4d9481969fbea993e379/FLAGd5ac69f28
[2020-08-21 17:19:32,418 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e97cb1795/1ce5b0b363df4d9481969fbea993e379
[2020-08-21 17:19:32,427 INFO  L296   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2020-08-21 17:19:32,428 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2020-08-21 17:19:32,429 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2020-08-21 17:19:32,430 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2020-08-21 17:19:32,433 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2020-08-21 17:19:32,434 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 05:19:32" (1/1) ...
[2020-08-21 17:19:32,438 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@68e64c0b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:19:32, skipping insertion in model container
[2020-08-21 17:19:32,438 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 05:19:32" (1/1) ...
[2020-08-21 17:19:32,446 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2020-08-21 17:19:32,468 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2020-08-21 17:19:32,645 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-08-21 17:19:32,653 INFO  L203         MainTranslator]: Completed pre-run
[2020-08-21 17:19:32,671 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-08-21 17:19:32,683 INFO  L208         MainTranslator]: Completed translation
[2020-08-21 17:19:32,684 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:19:32 WrapperNode
[2020-08-21 17:19:32,684 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2020-08-21 17:19:32,685 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2020-08-21 17:19:32,685 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2020-08-21 17:19:32,685 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2020-08-21 17:19:32,695 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:19:32" (1/1) ...
[2020-08-21 17:19:32,695 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:19:32" (1/1) ...
[2020-08-21 17:19:32,701 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:19:32" (1/1) ...
[2020-08-21 17:19:32,701 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:19:32" (1/1) ...
[2020-08-21 17:19:32,789 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:19:32" (1/1) ...
[2020-08-21 17:19:32,793 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:19:32" (1/1) ...
[2020-08-21 17:19:32,794 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:19:32" (1/1) ...
[2020-08-21 17:19:32,800 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2020-08-21 17:19:32,801 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2020-08-21 17:19:32,801 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2020-08-21 17:19:32,801 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2020-08-21 17:19:32,802 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:19:32" (1/1) ...
No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-08-21 17:19:32,870 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2020-08-21 17:19:32,871 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2020-08-21 17:19:32,871 INFO  L138     BoogieDeclarations]: Found implementation of procedure fibo1
[2020-08-21 17:19:32,871 INFO  L138     BoogieDeclarations]: Found implementation of procedure fibo2
[2020-08-21 17:19:32,871 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2020-08-21 17:19:32,871 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int
[2020-08-21 17:19:32,872 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2020-08-21 17:19:32,872 INFO  L130     BoogieDeclarations]: Found specification of procedure fibo1
[2020-08-21 17:19:32,872 INFO  L130     BoogieDeclarations]: Found specification of procedure fibo2
[2020-08-21 17:19:32,872 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2020-08-21 17:19:32,872 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2020-08-21 17:19:32,872 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2020-08-21 17:19:33,080 INFO  L290             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2020-08-21 17:19:33,080 INFO  L295             CfgBuilder]: Removed 0 assume(true) statements.
[2020-08-21 17:19:33,089 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 05:19:33 BoogieIcfgContainer
[2020-08-21 17:19:33,089 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2020-08-21 17:19:33,091 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2020-08-21 17:19:33,091 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2020-08-21 17:19:33,097 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2020-08-21 17:19:33,098 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 05:19:32" (1/3) ...
[2020-08-21 17:19:33,099 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@566da70a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 05:19:33, skipping insertion in model container
[2020-08-21 17:19:33,099 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:19:32" (2/3) ...
[2020-08-21 17:19:33,100 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@566da70a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 05:19:33, skipping insertion in model container
[2020-08-21 17:19:33,101 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 05:19:33" (3/3) ...
[2020-08-21 17:19:33,103 INFO  L109   eAbstractionObserver]: Analyzing ICFG fibo_2calls_6-1.c
[2020-08-21 17:19:33,113 INFO  L157   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION
[2020-08-21 17:19:33,120 INFO  L169   ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2020-08-21 17:19:33,135 INFO  L251      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2020-08-21 17:19:33,162 INFO  L375      AbstractCegarLoop]: Interprodecural is true
[2020-08-21 17:19:33,163 INFO  L376      AbstractCegarLoop]: Hoare is true
[2020-08-21 17:19:33,163 INFO  L377      AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation
[2020-08-21 17:19:33,163 INFO  L378      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2020-08-21 17:19:33,163 INFO  L379      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2020-08-21 17:19:33,163 INFO  L380      AbstractCegarLoop]: Difference is false
[2020-08-21 17:19:33,164 INFO  L381      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2020-08-21 17:19:33,164 INFO  L385      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2020-08-21 17:19:33,181 INFO  L276                IsEmpty]: Start isEmpty. Operand 33 states.
[2020-08-21 17:19:33,186 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 14
[2020-08-21 17:19:33,187 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-21 17:19:33,188 INFO  L422         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-08-21 17:19:33,188 INFO  L427      AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-21 17:19:33,193 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-21 17:19:33,194 INFO  L82        PathProgramCache]: Analyzing trace with hash 1464461757, now seen corresponding path program 1 times
[2020-08-21 17:19:33,200 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-21 17:19:33,201 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1160288658]
[2020-08-21 17:19:33,201 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-21 17:19:33,279 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:33,332 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-21 17:19:33,333 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:33,336 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5
[2020-08-21 17:19:33,340 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:33,397 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-08-21 17:19:33,398 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1160288658]
[2020-08-21 17:19:33,401 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-21 17:19:33,401 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2020-08-21 17:19:33,403 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118287943]
[2020-08-21 17:19:33,409 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 5 states
[2020-08-21 17:19:33,409 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-21 17:19:33,434 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2020-08-21 17:19:33,436 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2020-08-21 17:19:33,439 INFO  L87              Difference]: Start difference. First operand 33 states. Second operand 5 states.
[2020-08-21 17:19:33,551 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-21 17:19:33,552 INFO  L93              Difference]: Finished difference Result 44 states and 53 transitions.
[2020-08-21 17:19:33,553 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2020-08-21 17:19:33,554 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 13
[2020-08-21 17:19:33,555 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-21 17:19:33,565 INFO  L225             Difference]: With dead ends: 44
[2020-08-21 17:19:33,569 INFO  L226             Difference]: Without dead ends: 30
[2020-08-21 17:19:33,573 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
[2020-08-21 17:19:33,589 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 30 states.
[2020-08-21 17:19:33,613 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30.
[2020-08-21 17:19:33,614 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 30 states.
[2020-08-21 17:19:33,616 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions.
[2020-08-21 17:19:33,618 INFO  L78                 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 13
[2020-08-21 17:19:33,618 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-21 17:19:33,618 INFO  L479      AbstractCegarLoop]: Abstraction has 30 states and 37 transitions.
[2020-08-21 17:19:33,618 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2020-08-21 17:19:33,619 INFO  L276                IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions.
[2020-08-21 17:19:33,620 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 15
[2020-08-21 17:19:33,620 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-21 17:19:33,621 INFO  L422         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-08-21 17:19:33,621 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2020-08-21 17:19:33,621 INFO  L427      AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-21 17:19:33,622 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-21 17:19:33,622 INFO  L82        PathProgramCache]: Analyzing trace with hash -1134800479, now seen corresponding path program 1 times
[2020-08-21 17:19:33,622 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-21 17:19:33,623 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [831757102]
[2020-08-21 17:19:33,623 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-21 17:19:33,633 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:33,655 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-21 17:19:33,656 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:33,658 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5
[2020-08-21 17:19:33,663 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:33,719 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-08-21 17:19:33,720 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [831757102]
[2020-08-21 17:19:33,720 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-21 17:19:33,721 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2020-08-21 17:19:33,721 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138324317]
[2020-08-21 17:19:33,723 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 5 states
[2020-08-21 17:19:33,724 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-21 17:19:33,724 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2020-08-21 17:19:33,725 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2020-08-21 17:19:33,725 INFO  L87              Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 5 states.
[2020-08-21 17:19:33,812 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-21 17:19:33,813 INFO  L93              Difference]: Finished difference Result 36 states and 44 transitions.
[2020-08-21 17:19:33,813 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2020-08-21 17:19:33,814 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 14
[2020-08-21 17:19:33,814 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-21 17:19:33,815 INFO  L225             Difference]: With dead ends: 36
[2020-08-21 17:19:33,816 INFO  L226             Difference]: Without dead ends: 32
[2020-08-21 17:19:33,817 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
[2020-08-21 17:19:33,818 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 32 states.
[2020-08-21 17:19:33,825 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30.
[2020-08-21 17:19:33,825 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 30 states.
[2020-08-21 17:19:33,827 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions.
[2020-08-21 17:19:33,827 INFO  L78                 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 14
[2020-08-21 17:19:33,828 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-21 17:19:33,828 INFO  L479      AbstractCegarLoop]: Abstraction has 30 states and 37 transitions.
[2020-08-21 17:19:33,828 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2020-08-21 17:19:33,828 INFO  L276                IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions.
[2020-08-21 17:19:33,830 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 27
[2020-08-21 17:19:33,830 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-21 17:19:33,830 INFO  L422         BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-08-21 17:19:33,831 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2020-08-21 17:19:33,831 INFO  L427      AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-21 17:19:33,831 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-21 17:19:33,832 INFO  L82        PathProgramCache]: Analyzing trace with hash -1592795560, now seen corresponding path program 1 times
[2020-08-21 17:19:33,832 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-21 17:19:33,832 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [592915074]
[2020-08-21 17:19:33,832 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-21 17:19:33,849 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:33,879 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-21 17:19:33,880 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:33,882 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5
[2020-08-21 17:19:33,892 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:33,925 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 17:19:33,929 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:33,969 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9
[2020-08-21 17:19:33,975 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:33,988 INFO  L134       CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2020-08-21 17:19:33,989 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [592915074]
[2020-08-21 17:19:33,989 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-08-21 17:19:33,989 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7
[2020-08-21 17:19:33,993 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487164460]
[2020-08-21 17:19:33,993 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 7 states
[2020-08-21 17:19:33,994 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-21 17:19:33,994 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2020-08-21 17:19:33,994 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42
[2020-08-21 17:19:33,994 INFO  L87              Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 7 states.
[2020-08-21 17:19:34,119 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-21 17:19:34,119 INFO  L93              Difference]: Finished difference Result 58 states and 78 transitions.
[2020-08-21 17:19:34,120 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2020-08-21 17:19:34,120 INFO  L78                 Accepts]: Start accepts. Automaton has 7 states. Word has length 26
[2020-08-21 17:19:34,121 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-21 17:19:34,122 INFO  L225             Difference]: With dead ends: 58
[2020-08-21 17:19:34,123 INFO  L226             Difference]: Without dead ends: 34
[2020-08-21 17:19:34,124 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
[2020-08-21 17:19:34,125 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 34 states.
[2020-08-21 17:19:34,131 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32.
[2020-08-21 17:19:34,132 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 32 states.
[2020-08-21 17:19:34,133 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions.
[2020-08-21 17:19:34,134 INFO  L78                 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 26
[2020-08-21 17:19:34,134 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-21 17:19:34,134 INFO  L479      AbstractCegarLoop]: Abstraction has 32 states and 39 transitions.
[2020-08-21 17:19:34,134 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 7 states.
[2020-08-21 17:19:34,135 INFO  L276                IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions.
[2020-08-21 17:19:34,136 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 28
[2020-08-21 17:19:34,136 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-21 17:19:34,137 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]
[2020-08-21 17:19:34,137 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2020-08-21 17:19:34,137 INFO  L427      AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-21 17:19:34,138 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-21 17:19:34,138 INFO  L82        PathProgramCache]: Analyzing trace with hash 746633022, now seen corresponding path program 1 times
[2020-08-21 17:19:34,138 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-21 17:19:34,138 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [761281207]
[2020-08-21 17:19:34,139 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-21 17:19:34,149 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:34,170 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-21 17:19:34,171 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:34,173 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5
[2020-08-21 17:19:34,181 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:34,210 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 17:19:34,214 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:34,238 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10
[2020-08-21 17:19:34,241 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:34,250 INFO  L134       CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2020-08-21 17:19:34,250 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [761281207]
[2020-08-21 17:19:34,251 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-08-21 17:19:34,251 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7
[2020-08-21 17:19:34,251 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808759149]
[2020-08-21 17:19:34,252 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 7 states
[2020-08-21 17:19:34,252 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-21 17:19:34,253 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2020-08-21 17:19:34,253 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2020-08-21 17:19:34,253 INFO  L87              Difference]: Start difference. First operand 32 states and 39 transitions. Second operand 7 states.
[2020-08-21 17:19:34,443 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-21 17:19:34,444 INFO  L93              Difference]: Finished difference Result 54 states and 74 transitions.
[2020-08-21 17:19:34,444 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. 
[2020-08-21 17:19:34,445 INFO  L78                 Accepts]: Start accepts. Automaton has 7 states. Word has length 27
[2020-08-21 17:19:34,445 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-21 17:19:34,448 INFO  L225             Difference]: With dead ends: 54
[2020-08-21 17:19:34,448 INFO  L226             Difference]: Without dead ends: 50
[2020-08-21 17:19:34,449 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
[2020-08-21 17:19:34,450 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 50 states.
[2020-08-21 17:19:34,460 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 48.
[2020-08-21 17:19:34,461 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 48 states.
[2020-08-21 17:19:34,462 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 65 transitions.
[2020-08-21 17:19:34,463 INFO  L78                 Accepts]: Start accepts. Automaton has 48 states and 65 transitions. Word has length 27
[2020-08-21 17:19:34,463 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-21 17:19:34,464 INFO  L479      AbstractCegarLoop]: Abstraction has 48 states and 65 transitions.
[2020-08-21 17:19:34,464 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 7 states.
[2020-08-21 17:19:34,464 INFO  L276                IsEmpty]: Start isEmpty. Operand 48 states and 65 transitions.
[2020-08-21 17:19:34,466 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 40
[2020-08-21 17:19:34,466 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-21 17:19:34,466 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]
[2020-08-21 17:19:34,466 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3
[2020-08-21 17:19:34,466 INFO  L427      AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-21 17:19:34,467 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-21 17:19:34,467 INFO  L82        PathProgramCache]: Analyzing trace with hash 986908919, now seen corresponding path program 1 times
[2020-08-21 17:19:34,467 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-21 17:19:34,468 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [499517773]
[2020-08-21 17:19:34,468 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-21 17:19:34,477 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:34,492 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-21 17:19:34,493 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:34,495 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5
[2020-08-21 17:19:34,503 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:34,514 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 17:19:34,520 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:34,544 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 17:19:34,548 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:34,567 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9
[2020-08-21 17:19:34,568 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:34,571 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22
[2020-08-21 17:19:34,573 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:34,577 INFO  L134       CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked.
[2020-08-21 17:19:34,578 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [499517773]
[2020-08-21 17:19:34,578 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-08-21 17:19:34,578 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6
[2020-08-21 17:19:34,579 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205214173]
[2020-08-21 17:19:34,579 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 6 states
[2020-08-21 17:19:34,579 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-21 17:19:34,580 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2020-08-21 17:19:34,580 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30
[2020-08-21 17:19:34,580 INFO  L87              Difference]: Start difference. First operand 48 states and 65 transitions. Second operand 6 states.
[2020-08-21 17:19:34,647 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-21 17:19:34,647 INFO  L93              Difference]: Finished difference Result 94 states and 142 transitions.
[2020-08-21 17:19:34,650 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2020-08-21 17:19:34,650 INFO  L78                 Accepts]: Start accepts. Automaton has 6 states. Word has length 39
[2020-08-21 17:19:34,650 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-21 17:19:34,652 INFO  L225             Difference]: With dead ends: 94
[2020-08-21 17:19:34,652 INFO  L226             Difference]: Without dead ends: 52
[2020-08-21 17:19:34,653 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
[2020-08-21 17:19:34,654 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 52 states.
[2020-08-21 17:19:34,664 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52.
[2020-08-21 17:19:34,664 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 52 states.
[2020-08-21 17:19:34,668 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 71 transitions.
[2020-08-21 17:19:34,668 INFO  L78                 Accepts]: Start accepts. Automaton has 52 states and 71 transitions. Word has length 39
[2020-08-21 17:19:34,668 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-21 17:19:34,669 INFO  L479      AbstractCegarLoop]: Abstraction has 52 states and 71 transitions.
[2020-08-21 17:19:34,669 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 6 states.
[2020-08-21 17:19:34,669 INFO  L276                IsEmpty]: Start isEmpty. Operand 52 states and 71 transitions.
[2020-08-21 17:19:34,671 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 41
[2020-08-21 17:19:34,671 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-21 17:19:34,671 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]
[2020-08-21 17:19:34,672 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4
[2020-08-21 17:19:34,672 INFO  L427      AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-21 17:19:34,672 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-21 17:19:34,672 INFO  L82        PathProgramCache]: Analyzing trace with hash -2100495745, now seen corresponding path program 1 times
[2020-08-21 17:19:34,673 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-21 17:19:34,673 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1513998980]
[2020-08-21 17:19:34,673 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-21 17:19:34,683 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:34,701 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-21 17:19:34,702 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:34,703 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5
[2020-08-21 17:19:34,713 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:34,731 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 17:19:34,736 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:34,792 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 17:19:34,794 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:34,807 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10
[2020-08-21 17:19:34,810 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:34,814 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23
[2020-08-21 17:19:34,816 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:34,843 INFO  L134       CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked.
[2020-08-21 17:19:34,844 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1513998980]
[2020-08-21 17:19:34,844 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-08-21 17:19:34,844 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8
[2020-08-21 17:19:34,845 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748473300]
[2020-08-21 17:19:34,846 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 8 states
[2020-08-21 17:19:34,846 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-21 17:19:34,846 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2020-08-21 17:19:34,847 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56
[2020-08-21 17:19:34,848 INFO  L87              Difference]: Start difference. First operand 52 states and 71 transitions. Second operand 8 states.
[2020-08-21 17:19:34,973 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-21 17:19:34,973 INFO  L93              Difference]: Finished difference Result 103 states and 158 transitions.
[2020-08-21 17:19:34,974 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. 
[2020-08-21 17:19:34,974 INFO  L78                 Accepts]: Start accepts. Automaton has 8 states. Word has length 40
[2020-08-21 17:19:34,974 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-21 17:19:34,976 INFO  L225             Difference]: With dead ends: 103
[2020-08-21 17:19:34,976 INFO  L226             Difference]: Without dead ends: 57
[2020-08-21 17:19:34,977 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
[2020-08-21 17:19:34,978 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 57 states.
[2020-08-21 17:19:34,987 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 54.
[2020-08-21 17:19:34,988 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 54 states.
[2020-08-21 17:19:34,989 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 74 transitions.
[2020-08-21 17:19:34,989 INFO  L78                 Accepts]: Start accepts. Automaton has 54 states and 74 transitions. Word has length 40
[2020-08-21 17:19:34,990 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-21 17:19:34,990 INFO  L479      AbstractCegarLoop]: Abstraction has 54 states and 74 transitions.
[2020-08-21 17:19:34,990 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 8 states.
[2020-08-21 17:19:34,990 INFO  L276                IsEmpty]: Start isEmpty. Operand 54 states and 74 transitions.
[2020-08-21 17:19:34,992 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 42
[2020-08-21 17:19:34,993 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-21 17:19:34,993 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]
[2020-08-21 17:19:34,993 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5
[2020-08-21 17:19:34,993 INFO  L427      AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-21 17:19:34,994 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-21 17:19:34,994 INFO  L82        PathProgramCache]: Analyzing trace with hash 208191613, now seen corresponding path program 1 times
[2020-08-21 17:19:34,994 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-21 17:19:34,994 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [449129647]
[2020-08-21 17:19:34,994 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-21 17:19:35,008 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:35,048 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-21 17:19:35,049 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:35,051 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5
[2020-08-21 17:19:35,066 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:35,110 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 17:19:35,114 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:35,134 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 17:19:35,136 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:35,155 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10
[2020-08-21 17:19:35,157 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:35,160 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23
[2020-08-21 17:19:35,161 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:35,167 INFO  L134       CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked.
[2020-08-21 17:19:35,167 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [449129647]
[2020-08-21 17:19:35,168 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-08-21 17:19:35,168 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8
[2020-08-21 17:19:35,168 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912646601]
[2020-08-21 17:19:35,169 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 8 states
[2020-08-21 17:19:35,169 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-21 17:19:35,169 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2020-08-21 17:19:35,170 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56
[2020-08-21 17:19:35,170 INFO  L87              Difference]: Start difference. First operand 54 states and 74 transitions. Second operand 8 states.
[2020-08-21 17:19:35,370 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-21 17:19:35,372 INFO  L93              Difference]: Finished difference Result 86 states and 126 transitions.
[2020-08-21 17:19:35,372 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2020-08-21 17:19:35,372 INFO  L78                 Accepts]: Start accepts. Automaton has 8 states. Word has length 41
[2020-08-21 17:19:35,373 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-21 17:19:35,375 INFO  L225             Difference]: With dead ends: 86
[2020-08-21 17:19:35,375 INFO  L226             Difference]: Without dead ends: 82
[2020-08-21 17:19:35,378 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
[2020-08-21 17:19:35,379 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 82 states.
[2020-08-21 17:19:35,411 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 79.
[2020-08-21 17:19:35,412 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 79 states.
[2020-08-21 17:19:35,417 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 118 transitions.
[2020-08-21 17:19:35,417 INFO  L78                 Accepts]: Start accepts. Automaton has 79 states and 118 transitions. Word has length 41
[2020-08-21 17:19:35,419 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-21 17:19:35,419 INFO  L479      AbstractCegarLoop]: Abstraction has 79 states and 118 transitions.
[2020-08-21 17:19:35,419 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 8 states.
[2020-08-21 17:19:35,419 INFO  L276                IsEmpty]: Start isEmpty. Operand 79 states and 118 transitions.
[2020-08-21 17:19:35,426 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 55
[2020-08-21 17:19:35,430 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-21 17:19:35,430 INFO  L422         BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 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]
[2020-08-21 17:19:35,430 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6
[2020-08-21 17:19:35,431 INFO  L427      AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-21 17:19:35,431 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-21 17:19:35,431 INFO  L82        PathProgramCache]: Analyzing trace with hash -405677468, now seen corresponding path program 1 times
[2020-08-21 17:19:35,432 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-21 17:19:35,433 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1866379320]
[2020-08-21 17:19:35,433 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-21 17:19:35,461 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:35,492 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-21 17:19:35,493 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:35,495 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5
[2020-08-21 17:19:35,517 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:35,530 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 17:19:35,535 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:35,548 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 17:19:35,551 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:35,590 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 17:19:35,592 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:35,594 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10
[2020-08-21 17:19:35,595 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:35,598 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23
[2020-08-21 17:19:35,599 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:35,610 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36
[2020-08-21 17:19:35,611 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:35,617 INFO  L134       CoverageAnalysis]: Checked inductivity of 44 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked.
[2020-08-21 17:19:35,617 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1866379320]
[2020-08-21 17:19:35,618 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-08-21 17:19:35,618 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8
[2020-08-21 17:19:35,618 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468972337]
[2020-08-21 17:19:35,619 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 8 states
[2020-08-21 17:19:35,619 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-21 17:19:35,619 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2020-08-21 17:19:35,619 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56
[2020-08-21 17:19:35,620 INFO  L87              Difference]: Start difference. First operand 79 states and 118 transitions. Second operand 8 states.
[2020-08-21 17:19:35,752 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-21 17:19:35,753 INFO  L93              Difference]: Finished difference Result 167 states and 288 transitions.
[2020-08-21 17:19:35,754 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. 
[2020-08-21 17:19:35,755 INFO  L78                 Accepts]: Start accepts. Automaton has 8 states. Word has length 54
[2020-08-21 17:19:35,755 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-21 17:19:35,760 INFO  L225             Difference]: With dead ends: 167
[2020-08-21 17:19:35,760 INFO  L226             Difference]: Without dead ends: 94
[2020-08-21 17:19:35,761 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
[2020-08-21 17:19:35,762 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 94 states.
[2020-08-21 17:19:35,795 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 88.
[2020-08-21 17:19:35,795 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 88 states.
[2020-08-21 17:19:35,797 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 134 transitions.
[2020-08-21 17:19:35,798 INFO  L78                 Accepts]: Start accepts. Automaton has 88 states and 134 transitions. Word has length 54
[2020-08-21 17:19:35,798 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-21 17:19:35,798 INFO  L479      AbstractCegarLoop]: Abstraction has 88 states and 134 transitions.
[2020-08-21 17:19:35,798 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 8 states.
[2020-08-21 17:19:35,799 INFO  L276                IsEmpty]: Start isEmpty. Operand 88 states and 134 transitions.
[2020-08-21 17:19:35,802 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 56
[2020-08-21 17:19:35,802 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-21 17:19:35,803 INFO  L422         BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 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]
[2020-08-21 17:19:35,803 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7
[2020-08-21 17:19:35,803 INFO  L427      AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-21 17:19:35,804 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-21 17:19:35,805 INFO  L82        PathProgramCache]: Analyzing trace with hash -242988780, now seen corresponding path program 1 times
[2020-08-21 17:19:35,806 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-21 17:19:35,806 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1542864615]
[2020-08-21 17:19:35,807 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-21 17:19:35,822 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:35,847 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-21 17:19:35,848 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:35,849 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5
[2020-08-21 17:19:35,864 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:35,891 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 17:19:35,896 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:35,925 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 17:19:35,930 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:35,978 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 17:19:35,979 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:35,982 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10
[2020-08-21 17:19:35,983 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:35,989 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23
[2020-08-21 17:19:35,990 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:35,996 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37
[2020-08-21 17:19:35,999 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:36,026 INFO  L134       CoverageAnalysis]: Checked inductivity of 46 backedges. 19 proven. 11 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked.
[2020-08-21 17:19:36,027 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1542864615]
[2020-08-21 17:19:36,027 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-08-21 17:19:36,028 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10
[2020-08-21 17:19:36,033 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12558040]
[2020-08-21 17:19:36,034 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 10 states
[2020-08-21 17:19:36,034 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-21 17:19:36,034 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants.
[2020-08-21 17:19:36,038 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90
[2020-08-21 17:19:36,038 INFO  L87              Difference]: Start difference. First operand 88 states and 134 transitions. Second operand 10 states.
[2020-08-21 17:19:36,290 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-21 17:19:36,291 INFO  L93              Difference]: Finished difference Result 188 states and 331 transitions.
[2020-08-21 17:19:36,291 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. 
[2020-08-21 17:19:36,291 INFO  L78                 Accepts]: Start accepts. Automaton has 10 states. Word has length 55
[2020-08-21 17:19:36,292 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-21 17:19:36,293 INFO  L225             Difference]: With dead ends: 188
[2020-08-21 17:19:36,294 INFO  L226             Difference]: Without dead ends: 109
[2020-08-21 17:19:36,295 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
[2020-08-21 17:19:36,296 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 109 states.
[2020-08-21 17:19:36,308 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 100.
[2020-08-21 17:19:36,308 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 100 states.
[2020-08-21 17:19:36,310 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 158 transitions.
[2020-08-21 17:19:36,310 INFO  L78                 Accepts]: Start accepts. Automaton has 100 states and 158 transitions. Word has length 55
[2020-08-21 17:19:36,311 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-21 17:19:36,311 INFO  L479      AbstractCegarLoop]: Abstraction has 100 states and 158 transitions.
[2020-08-21 17:19:36,311 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 10 states.
[2020-08-21 17:19:36,311 INFO  L276                IsEmpty]: Start isEmpty. Operand 100 states and 158 transitions.
[2020-08-21 17:19:36,313 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 83
[2020-08-21 17:19:36,313 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-21 17:19:36,313 INFO  L422         BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-08-21 17:19:36,314 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8
[2020-08-21 17:19:36,314 INFO  L427      AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-21 17:19:36,314 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-21 17:19:36,314 INFO  L82        PathProgramCache]: Analyzing trace with hash -908952008, now seen corresponding path program 2 times
[2020-08-21 17:19:36,314 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-21 17:19:36,315 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [250701587]
[2020-08-21 17:19:36,315 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-21 17:19:36,323 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:36,341 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-21 17:19:36,342 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:36,343 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5
[2020-08-21 17:19:36,350 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:36,379 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 17:19:36,384 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:36,417 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 17:19:36,420 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:36,444 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 17:19:36,446 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:36,475 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10
[2020-08-21 17:19:36,476 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:36,478 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23
[2020-08-21 17:19:36,479 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:36,481 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37
[2020-08-21 17:19:36,485 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:36,501 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 17:19:36,504 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:36,547 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 17:19:36,548 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:36,550 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10
[2020-08-21 17:19:36,552 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:36,554 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23
[2020-08-21 17:19:36,555 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:36,569 INFO  L134       CoverageAnalysis]: Checked inductivity of 132 backedges. 30 proven. 52 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked.
[2020-08-21 17:19:36,569 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [250701587]
[2020-08-21 17:19:36,570 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-08-21 17:19:36,570 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12
[2020-08-21 17:19:36,570 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986063018]
[2020-08-21 17:19:36,571 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 12 states
[2020-08-21 17:19:36,571 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-21 17:19:36,572 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants.
[2020-08-21 17:19:36,572 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132
[2020-08-21 17:19:36,572 INFO  L87              Difference]: Start difference. First operand 100 states and 158 transitions. Second operand 12 states.
[2020-08-21 17:19:36,951 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-21 17:19:36,951 INFO  L93              Difference]: Finished difference Result 199 states and 354 transitions.
[2020-08-21 17:19:36,952 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. 
[2020-08-21 17:19:36,952 INFO  L78                 Accepts]: Start accepts. Automaton has 12 states. Word has length 82
[2020-08-21 17:19:36,953 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-21 17:19:36,954 INFO  L225             Difference]: With dead ends: 199
[2020-08-21 17:19:36,954 INFO  L226             Difference]: Without dead ends: 86
[2020-08-21 17:19:36,956 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
[2020-08-21 17:19:36,957 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 86 states.
[2020-08-21 17:19:36,963 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 71.
[2020-08-21 17:19:36,964 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 71 states.
[2020-08-21 17:19:36,965 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 93 transitions.
[2020-08-21 17:19:36,965 INFO  L78                 Accepts]: Start accepts. Automaton has 71 states and 93 transitions. Word has length 82
[2020-08-21 17:19:36,965 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-21 17:19:36,966 INFO  L479      AbstractCegarLoop]: Abstraction has 71 states and 93 transitions.
[2020-08-21 17:19:36,966 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 12 states.
[2020-08-21 17:19:36,966 INFO  L276                IsEmpty]: Start isEmpty. Operand 71 states and 93 transitions.
[2020-08-21 17:19:36,967 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 111
[2020-08-21 17:19:36,967 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-21 17:19:36,968 INFO  L422         BasicCegarLoop]: trace histogram [9, 9, 7, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-08-21 17:19:36,968 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9
[2020-08-21 17:19:36,968 INFO  L427      AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-21 17:19:36,968 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-21 17:19:36,969 INFO  L82        PathProgramCache]: Analyzing trace with hash -2119203654, now seen corresponding path program 2 times
[2020-08-21 17:19:36,969 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-21 17:19:36,969 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1450403296]
[2020-08-21 17:19:36,969 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-21 17:19:36,978 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:37,004 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-21 17:19:37,005 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:37,006 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5
[2020-08-21 17:19:37,014 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:37,025 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 17:19:37,031 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:37,043 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 17:19:37,048 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:37,067 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 17:19:37,071 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:37,110 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 17:19:37,111 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:37,113 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10
[2020-08-21 17:19:37,114 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:37,116 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23
[2020-08-21 17:19:37,117 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:37,119 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37
[2020-08-21 17:19:37,120 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:37,139 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51
[2020-08-21 17:19:37,144 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:37,171 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 17:19:37,172 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:37,177 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 17:19:37,178 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:37,181 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 17:19:37,181 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:37,183 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10
[2020-08-21 17:19:37,183 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:37,184 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23
[2020-08-21 17:19:37,185 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:37,187 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37
[2020-08-21 17:19:37,188 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:37,205 INFO  L134       CoverageAnalysis]: Checked inductivity of 276 backedges. 44 proven. 79 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked.
[2020-08-21 17:19:37,206 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1450403296]
[2020-08-21 17:19:37,206 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-08-21 17:19:37,206 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10
[2020-08-21 17:19:37,207 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708327207]
[2020-08-21 17:19:37,207 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 10 states
[2020-08-21 17:19:37,207 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-21 17:19:37,208 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants.
[2020-08-21 17:19:37,208 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90
[2020-08-21 17:19:37,208 INFO  L87              Difference]: Start difference. First operand 71 states and 93 transitions. Second operand 10 states.
[2020-08-21 17:19:37,417 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-21 17:19:37,418 INFO  L93              Difference]: Finished difference Result 142 states and 204 transitions.
[2020-08-21 17:19:37,418 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. 
[2020-08-21 17:19:37,418 INFO  L78                 Accepts]: Start accepts. Automaton has 10 states. Word has length 110
[2020-08-21 17:19:37,419 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-21 17:19:37,421 INFO  L225             Difference]: With dead ends: 142
[2020-08-21 17:19:37,421 INFO  L226             Difference]: Without dead ends: 78
[2020-08-21 17:19:37,423 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182
[2020-08-21 17:19:37,423 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 78 states.
[2020-08-21 17:19:37,430 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78.
[2020-08-21 17:19:37,430 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 78 states.
[2020-08-21 17:19:37,432 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 100 transitions.
[2020-08-21 17:19:37,432 INFO  L78                 Accepts]: Start accepts. Automaton has 78 states and 100 transitions. Word has length 110
[2020-08-21 17:19:37,432 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-21 17:19:37,433 INFO  L479      AbstractCegarLoop]: Abstraction has 78 states and 100 transitions.
[2020-08-21 17:19:37,433 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 10 states.
[2020-08-21 17:19:37,433 INFO  L276                IsEmpty]: Start isEmpty. Operand 78 states and 100 transitions.
[2020-08-21 17:19:37,435 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 193
[2020-08-21 17:19:37,436 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-21 17:19:37,436 INFO  L422         BasicCegarLoop]: trace histogram [17, 17, 13, 10, 10, 10, 8, 8, 8, 8, 8, 8, 8, 8, 5, 5, 5, 5, 5, 5, 5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-08-21 17:19:37,436 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10
[2020-08-21 17:19:37,437 INFO  L427      AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-21 17:19:37,437 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-21 17:19:37,437 INFO  L82        PathProgramCache]: Analyzing trace with hash -1263382818, now seen corresponding path program 3 times
[2020-08-21 17:19:37,437 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-21 17:19:37,438 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [151722378]
[2020-08-21 17:19:37,438 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-21 17:19:37,451 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:37,485 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-21 17:19:37,486 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:37,487 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5
[2020-08-21 17:19:37,508 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:37,560 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 17:19:37,575 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:37,605 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 17:19:37,611 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:37,633 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 17:19:37,636 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:37,667 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 17:19:37,669 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:37,687 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10
[2020-08-21 17:19:37,689 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:37,693 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23
[2020-08-21 17:19:37,695 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:37,699 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37
[2020-08-21 17:19:37,707 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:37,727 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 17:19:37,735 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:37,745 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 17:19:37,747 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:37,751 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10
[2020-08-21 17:19:37,753 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:37,755 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24
[2020-08-21 17:19:37,758 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:37,814 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 17:19:37,816 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:37,818 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10
[2020-08-21 17:19:37,820 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:37,836 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92
[2020-08-21 17:19:37,851 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:37,887 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 17:19:37,893 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:37,914 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 17:19:37,918 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:37,925 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 17:19:37,927 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:37,929 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10
[2020-08-21 17:19:37,930 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:37,932 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23
[2020-08-21 17:19:37,934 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:37,937 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37
[2020-08-21 17:19:37,943 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:37,949 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 17:19:37,951 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:37,953 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 17:19:37,954 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:37,956 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10
[2020-08-21 17:19:37,956 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:37,958 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24
[2020-08-21 17:19:37,959 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:37,962 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 17:19:37,963 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:37,965 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10
[2020-08-21 17:19:37,966 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:38,057 INFO  L134       CoverageAnalysis]: Checked inductivity of 999 backedges. 133 proven. 373 refuted. 0 times theorem prover too weak. 493 trivial. 0 not checked.
[2020-08-21 17:19:38,057 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [151722378]
[2020-08-21 17:19:38,058 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-08-21 17:19:38,058 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15
[2020-08-21 17:19:38,058 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272573338]
[2020-08-21 17:19:38,059 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 15 states
[2020-08-21 17:19:38,059 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-21 17:19:38,059 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants.
[2020-08-21 17:19:38,060 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210
[2020-08-21 17:19:38,060 INFO  L87              Difference]: Start difference. First operand 78 states and 100 transitions. Second operand 15 states.
[2020-08-21 17:19:38,680 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-21 17:19:38,680 INFO  L93              Difference]: Finished difference Result 184 states and 282 transitions.
[2020-08-21 17:19:38,681 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. 
[2020-08-21 17:19:38,681 INFO  L78                 Accepts]: Start accepts. Automaton has 15 states. Word has length 192
[2020-08-21 17:19:38,682 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-21 17:19:38,683 INFO  L225             Difference]: With dead ends: 184
[2020-08-21 17:19:38,683 INFO  L226             Difference]: Without dead ends: 111
[2020-08-21 17:19:38,685 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=137, Invalid=675, Unknown=0, NotChecked=0, Total=812
[2020-08-21 17:19:38,685 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 111 states.
[2020-08-21 17:19:38,693 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 99.
[2020-08-21 17:19:38,693 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 99 states.
[2020-08-21 17:19:38,694 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 133 transitions.
[2020-08-21 17:19:38,695 INFO  L78                 Accepts]: Start accepts. Automaton has 99 states and 133 transitions. Word has length 192
[2020-08-21 17:19:38,695 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-21 17:19:38,695 INFO  L479      AbstractCegarLoop]: Abstraction has 99 states and 133 transitions.
[2020-08-21 17:19:38,695 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 15 states.
[2020-08-21 17:19:38,696 INFO  L276                IsEmpty]: Start isEmpty. Operand 99 states and 133 transitions.
[2020-08-21 17:19:38,697 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 137
[2020-08-21 17:19:38,698 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-21 17:19:38,698 INFO  L422         BasicCegarLoop]: trace histogram [10, 10, 9, 9, 8, 7, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-08-21 17:19:38,698 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11
[2020-08-21 17:19:38,698 INFO  L427      AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-21 17:19:38,699 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-21 17:19:38,699 INFO  L82        PathProgramCache]: Analyzing trace with hash -2102107778, now seen corresponding path program 1 times
[2020-08-21 17:19:38,699 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-21 17:19:38,699 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1823247399]
[2020-08-21 17:19:38,699 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-21 17:19:38,713 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:38,748 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-21 17:19:38,749 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:38,750 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5
[2020-08-21 17:19:38,760 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:38,776 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 17:19:38,786 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:38,804 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 17:19:38,810 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:38,833 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 17:19:38,837 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:38,842 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 17:19:38,843 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:38,846 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 17:19:38,846 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:38,848 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10
[2020-08-21 17:19:38,848 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:38,850 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23
[2020-08-21 17:19:38,850 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:38,852 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37
[2020-08-21 17:19:38,855 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:38,891 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 17:19:38,894 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:38,896 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10
[2020-08-21 17:19:38,897 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:38,901 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64
[2020-08-21 17:19:38,904 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:38,919 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 17:19:38,922 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:38,935 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10
[2020-08-21 17:19:38,936 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:38,944 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91
[2020-08-21 17:19:38,948 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:38,952 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 17:19:38,953 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:38,956 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 17:19:38,957 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:38,958 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10
[2020-08-21 17:19:38,959 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:38,960 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23
[2020-08-21 17:19:38,961 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:38,990 INFO  L134       CoverageAnalysis]: Checked inductivity of 437 backedges. 109 proven. 85 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked.
[2020-08-21 17:19:38,990 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1823247399]
[2020-08-21 17:19:38,991 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-08-21 17:19:38,991 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11
[2020-08-21 17:19:38,991 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61639284]
[2020-08-21 17:19:38,992 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 11 states
[2020-08-21 17:19:38,992 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-21 17:19:38,992 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants.
[2020-08-21 17:19:38,993 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110
[2020-08-21 17:19:38,993 INFO  L87              Difference]: Start difference. First operand 99 states and 133 transitions. Second operand 11 states.
[2020-08-21 17:19:39,269 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-21 17:19:39,270 INFO  L93              Difference]: Finished difference Result 188 states and 266 transitions.
[2020-08-21 17:19:39,270 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. 
[2020-08-21 17:19:39,271 INFO  L78                 Accepts]: Start accepts. Automaton has 11 states. Word has length 136
[2020-08-21 17:19:39,271 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-21 17:19:39,273 INFO  L225             Difference]: With dead ends: 188
[2020-08-21 17:19:39,273 INFO  L226             Difference]: Without dead ends: 101
[2020-08-21 17:19:39,275 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272
[2020-08-21 17:19:39,276 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 101 states.
[2020-08-21 17:19:39,283 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 98.
[2020-08-21 17:19:39,283 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 98 states.
[2020-08-21 17:19:39,285 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 130 transitions.
[2020-08-21 17:19:39,286 INFO  L78                 Accepts]: Start accepts. Automaton has 98 states and 130 transitions. Word has length 136
[2020-08-21 17:19:39,286 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-21 17:19:39,286 INFO  L479      AbstractCegarLoop]: Abstraction has 98 states and 130 transitions.
[2020-08-21 17:19:39,287 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 11 states.
[2020-08-21 17:19:39,287 INFO  L276                IsEmpty]: Start isEmpty. Operand 98 states and 130 transitions.
[2020-08-21 17:19:39,290 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 178
[2020-08-21 17:19:39,291 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-21 17:19:39,291 INFO  L422         BasicCegarLoop]: trace histogram [13, 13, 12, 12, 11, 9, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-08-21 17:19:39,291 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12
[2020-08-21 17:19:39,292 INFO  L427      AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-21 17:19:39,292 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-21 17:19:39,293 INFO  L82        PathProgramCache]: Analyzing trace with hash 677703633, now seen corresponding path program 2 times
[2020-08-21 17:19:39,293 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-21 17:19:39,293 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [762722280]
[2020-08-21 17:19:39,294 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-21 17:19:39,313 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:39,363 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-21 17:19:39,364 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:39,365 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5
[2020-08-21 17:19:39,382 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:39,411 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 17:19:39,444 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:39,468 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 17:19:39,473 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:39,491 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 17:19:39,495 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:39,513 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 17:19:39,516 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:39,528 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 17:19:39,530 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:39,541 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10
[2020-08-21 17:19:39,542 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:39,544 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23
[2020-08-21 17:19:39,545 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:39,547 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37
[2020-08-21 17:19:39,548 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:39,551 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 17:19:39,551 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:39,553 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10
[2020-08-21 17:19:39,553 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:39,557 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64
[2020-08-21 17:19:39,563 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:39,580 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 17:19:39,583 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:39,599 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 17:19:39,601 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:39,642 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 17:19:39,643 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:39,645 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10
[2020-08-21 17:19:39,646 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:39,648 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23
[2020-08-21 17:19:39,649 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:39,652 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37
[2020-08-21 17:19:39,655 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:39,658 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 17:19:39,659 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:39,661 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10
[2020-08-21 17:19:39,661 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:39,683 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132
[2020-08-21 17:19:39,688 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:39,693 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 17:19:39,694 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:39,697 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 17:19:39,697 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:39,699 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10
[2020-08-21 17:19:39,699 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:39,701 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23
[2020-08-21 17:19:39,702 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:39,765 INFO  L134       CoverageAnalysis]: Checked inductivity of 787 backedges. 138 proven. 250 refuted. 0 times theorem prover too weak. 399 trivial. 0 not checked.
[2020-08-21 17:19:39,766 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [762722280]
[2020-08-21 17:19:39,766 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-08-21 17:19:39,766 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14
[2020-08-21 17:19:39,767 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86308226]
[2020-08-21 17:19:39,767 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 14 states
[2020-08-21 17:19:39,768 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-21 17:19:39,768 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants.
[2020-08-21 17:19:39,768 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182
[2020-08-21 17:19:39,769 INFO  L87              Difference]: Start difference. First operand 98 states and 130 transitions. Second operand 14 states.
[2020-08-21 17:19:40,306 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-21 17:19:40,306 INFO  L93              Difference]: Finished difference Result 217 states and 326 transitions.
[2020-08-21 17:19:40,306 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. 
[2020-08-21 17:19:40,307 INFO  L78                 Accepts]: Start accepts. Automaton has 14 states. Word has length 177
[2020-08-21 17:19:40,307 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-21 17:19:40,309 INFO  L225             Difference]: With dead ends: 217
[2020-08-21 17:19:40,309 INFO  L226             Difference]: Without dead ends: 124
[2020-08-21 17:19:40,311 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=131, Invalid=625, Unknown=0, NotChecked=0, Total=756
[2020-08-21 17:19:40,311 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 124 states.
[2020-08-21 17:19:40,320 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 107.
[2020-08-21 17:19:40,321 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 107 states.
[2020-08-21 17:19:40,322 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 144 transitions.
[2020-08-21 17:19:40,323 INFO  L78                 Accepts]: Start accepts. Automaton has 107 states and 144 transitions. Word has length 177
[2020-08-21 17:19:40,323 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-21 17:19:40,323 INFO  L479      AbstractCegarLoop]: Abstraction has 107 states and 144 transitions.
[2020-08-21 17:19:40,323 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 14 states.
[2020-08-21 17:19:40,324 INFO  L276                IsEmpty]: Start isEmpty. Operand 107 states and 144 transitions.
[2020-08-21 17:19:40,326 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 151
[2020-08-21 17:19:40,326 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-21 17:19:40,327 INFO  L422         BasicCegarLoop]: trace histogram [11, 11, 10, 10, 9, 8, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-08-21 17:19:40,327 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13
[2020-08-21 17:19:40,327 INFO  L427      AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-21 17:19:40,327 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-21 17:19:40,328 INFO  L82        PathProgramCache]: Analyzing trace with hash -529934979, now seen corresponding path program 3 times
[2020-08-21 17:19:40,328 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-21 17:19:40,328 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1910566746]
[2020-08-21 17:19:40,328 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-21 17:19:40,349 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:40,380 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-21 17:19:40,380 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:40,381 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5
[2020-08-21 17:19:40,398 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:40,425 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 17:19:40,438 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:40,464 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 17:19:40,472 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:40,495 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 17:19:40,499 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:40,514 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 17:19:40,516 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:40,550 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 17:19:40,551 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:40,553 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10
[2020-08-21 17:19:40,554 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:40,556 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23
[2020-08-21 17:19:40,557 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:40,560 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37
[2020-08-21 17:19:40,562 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:40,565 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 17:19:40,566 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:40,567 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10
[2020-08-21 17:19:40,568 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:40,573 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64
[2020-08-21 17:19:40,577 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:40,581 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 17:19:40,582 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:40,585 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 17:19:40,586 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:40,587 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10
[2020-08-21 17:19:40,587 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:40,588 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23
[2020-08-21 17:19:40,589 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:40,598 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105
[2020-08-21 17:19:40,603 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:40,619 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 17:19:40,621 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:40,636 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 17:19:40,637 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:40,651 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10
[2020-08-21 17:19:40,652 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:40,653 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23
[2020-08-21 17:19:40,654 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:40,697 INFO  L134       CoverageAnalysis]: Checked inductivity of 544 backedges. 144 proven. 139 refuted. 0 times theorem prover too weak. 261 trivial. 0 not checked.
[2020-08-21 17:19:40,697 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1910566746]
[2020-08-21 17:19:40,697 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-08-21 17:19:40,698 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14
[2020-08-21 17:19:40,698 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978187424]
[2020-08-21 17:19:40,698 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 14 states
[2020-08-21 17:19:40,698 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-21 17:19:40,699 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants.
[2020-08-21 17:19:40,699 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182
[2020-08-21 17:19:40,699 INFO  L87              Difference]: Start difference. First operand 107 states and 144 transitions. Second operand 14 states.
[2020-08-21 17:19:41,145 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-21 17:19:41,145 INFO  L93              Difference]: Finished difference Result 211 states and 302 transitions.
[2020-08-21 17:19:41,147 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. 
[2020-08-21 17:19:41,147 INFO  L78                 Accepts]: Start accepts. Automaton has 14 states. Word has length 150
[2020-08-21 17:19:41,148 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-21 17:19:41,149 INFO  L225             Difference]: With dead ends: 211
[2020-08-21 17:19:41,150 INFO  L226             Difference]: Without dead ends: 114
[2020-08-21 17:19:41,151 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600
[2020-08-21 17:19:41,152 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 114 states.
[2020-08-21 17:19:41,158 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 111.
[2020-08-21 17:19:41,159 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 111 states.
[2020-08-21 17:19:41,160 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 147 transitions.
[2020-08-21 17:19:41,160 INFO  L78                 Accepts]: Start accepts. Automaton has 111 states and 147 transitions. Word has length 150
[2020-08-21 17:19:41,160 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-21 17:19:41,160 INFO  L479      AbstractCegarLoop]: Abstraction has 111 states and 147 transitions.
[2020-08-21 17:19:41,161 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 14 states.
[2020-08-21 17:19:41,161 INFO  L276                IsEmpty]: Start isEmpty. Operand 111 states and 147 transitions.
[2020-08-21 17:19:41,163 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 178
[2020-08-21 17:19:41,163 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-21 17:19:41,163 INFO  L422         BasicCegarLoop]: trace histogram [13, 13, 12, 12, 10, 10, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-08-21 17:19:41,163 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14
[2020-08-21 17:19:41,164 INFO  L427      AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-21 17:19:41,164 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-21 17:19:41,164 INFO  L82        PathProgramCache]: Analyzing trace with hash 307857833, now seen corresponding path program 4 times
[2020-08-21 17:19:41,164 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-21 17:19:41,164 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1602223674]
[2020-08-21 17:19:41,165 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-21 17:19:41,189 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:41,245 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-21 17:19:41,246 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:41,246 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5
[2020-08-21 17:19:41,266 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:41,323 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 17:19:41,337 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:41,394 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 17:19:41,401 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:41,452 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 17:19:41,456 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:41,514 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 17:19:41,517 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:41,595 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 17:19:41,596 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:41,621 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10
[2020-08-21 17:19:41,623 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:41,650 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23
[2020-08-21 17:19:41,652 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:41,655 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37
[2020-08-21 17:19:41,657 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:41,689 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 17:19:41,690 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:41,692 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10
[2020-08-21 17:19:41,694 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:41,727 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64
[2020-08-21 17:19:41,730 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:41,792 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 17:19:41,795 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:41,802 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 17:19:41,804 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:41,807 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10
[2020-08-21 17:19:41,808 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:41,813 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23
[2020-08-21 17:19:41,814 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:41,829 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105
[2020-08-21 17:19:41,838 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:41,949 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 17:19:41,952 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:41,968 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 17:19:41,975 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:41,981 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 17:19:41,982 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:41,984 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10
[2020-08-21 17:19:41,986 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:41,988 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23
[2020-08-21 17:19:41,990 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:41,993 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37
[2020-08-21 17:19:41,996 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:42,001 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 17:19:42,002 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:42,004 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10
[2020-08-21 17:19:42,006 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:42,099 INFO  L134       CoverageAnalysis]: Checked inductivity of 786 backedges. 0 proven. 267 refuted. 0 times theorem prover too weak. 519 trivial. 0 not checked.
[2020-08-21 17:19:42,101 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1602223674]
[2020-08-21 17:19:42,104 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-08-21 17:19:42,104 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28
[2020-08-21 17:19:42,105 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44266899]
[2020-08-21 17:19:42,105 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 28 states
[2020-08-21 17:19:42,105 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-21 17:19:42,106 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants.
[2020-08-21 17:19:42,106 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=703, Unknown=0, NotChecked=0, Total=756
[2020-08-21 17:19:42,106 INFO  L87              Difference]: Start difference. First operand 111 states and 147 transitions. Second operand 28 states.
[2020-08-21 17:19:42,678 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-21 17:19:42,678 INFO  L93              Difference]: Finished difference Result 124 states and 167 transitions.
[2020-08-21 17:19:42,679 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. 
[2020-08-21 17:19:42,679 INFO  L78                 Accepts]: Start accepts. Automaton has 28 states. Word has length 177
[2020-08-21 17:19:42,680 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-21 17:19:42,681 INFO  L225             Difference]: With dead ends: 124
[2020-08-21 17:19:42,681 INFO  L226             Difference]: Without dead ends: 120
[2020-08-21 17:19:42,684 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=85, Invalid=1175, Unknown=0, NotChecked=0, Total=1260
[2020-08-21 17:19:42,684 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 120 states.
[2020-08-21 17:19:42,692 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 116.
[2020-08-21 17:19:42,692 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 116 states.
[2020-08-21 17:19:42,693 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 157 transitions.
[2020-08-21 17:19:42,694 INFO  L78                 Accepts]: Start accepts. Automaton has 116 states and 157 transitions. Word has length 177
[2020-08-21 17:19:42,695 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-21 17:19:42,696 INFO  L479      AbstractCegarLoop]: Abstraction has 116 states and 157 transitions.
[2020-08-21 17:19:42,696 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 28 states.
[2020-08-21 17:19:42,696 INFO  L276                IsEmpty]: Start isEmpty. Operand 116 states and 157 transitions.
[2020-08-21 17:19:42,698 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 219
[2020-08-21 17:19:42,698 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-21 17:19:42,699 INFO  L422         BasicCegarLoop]: trace histogram [17, 17, 14, 14, 13, 12, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 6, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-08-21 17:19:42,699 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15
[2020-08-21 17:19:42,699 INFO  L427      AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-21 17:19:42,699 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-21 17:19:42,700 INFO  L82        PathProgramCache]: Analyzing trace with hash -678687486, now seen corresponding path program 5 times
[2020-08-21 17:19:42,700 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-21 17:19:42,700 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [465514216]
[2020-08-21 17:19:42,700 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-21 17:19:42,725 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:42,771 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-21 17:19:42,772 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:42,772 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5
[2020-08-21 17:19:42,789 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:42,821 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 17:19:42,829 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:42,856 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 17:19:42,862 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:42,885 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 17:19:42,888 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:42,903 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 17:19:42,908 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:42,922 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 17:19:42,923 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:42,937 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10
[2020-08-21 17:19:42,938 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:42,940 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23
[2020-08-21 17:19:42,941 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:42,943 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37
[2020-08-21 17:19:42,946 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:42,949 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 17:19:42,949 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:42,950 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10
[2020-08-21 17:19:42,951 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:42,955 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64
[2020-08-21 17:19:42,958 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:42,962 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 17:19:42,963 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:42,965 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 17:19:42,966 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:42,967 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10
[2020-08-21 17:19:42,968 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:42,969 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23
[2020-08-21 17:19:42,970 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:42,987 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105
[2020-08-21 17:19:42,996 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:43,025 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 17:19:43,032 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:43,056 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 17:19:43,060 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:43,083 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 17:19:43,085 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:43,131 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 17:19:43,133 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:43,134 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10
[2020-08-21 17:19:43,135 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:43,137 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23
[2020-08-21 17:19:43,138 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:43,141 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37
[2020-08-21 17:19:43,144 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:43,178 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 17:19:43,178 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:43,180 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10
[2020-08-21 17:19:43,180 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:43,183 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64
[2020-08-21 17:19:43,186 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:43,190 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 17:19:43,191 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:43,193 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 17:19:43,194 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:43,195 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10
[2020-08-21 17:19:43,195 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:43,197 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23
[2020-08-21 17:19:43,197 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:43,272 INFO  L134       CoverageAnalysis]: Checked inductivity of 1248 backedges. 207 proven. 371 refuted. 0 times theorem prover too weak. 670 trivial. 0 not checked.
[2020-08-21 17:19:43,273 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [465514216]
[2020-08-21 17:19:43,273 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-08-21 17:19:43,273 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16
[2020-08-21 17:19:43,273 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850015790]
[2020-08-21 17:19:43,274 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 16 states
[2020-08-21 17:19:43,274 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-21 17:19:43,274 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants.
[2020-08-21 17:19:43,274 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240
[2020-08-21 17:19:43,275 INFO  L87              Difference]: Start difference. First operand 116 states and 157 transitions. Second operand 16 states.
[2020-08-21 17:19:43,978 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-21 17:19:43,979 INFO  L93              Difference]: Finished difference Result 245 states and 365 transitions.
[2020-08-21 17:19:43,980 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. 
[2020-08-21 17:19:43,980 INFO  L78                 Accepts]: Start accepts. Automaton has 16 states. Word has length 218
[2020-08-21 17:19:43,981 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-21 17:19:43,983 INFO  L225             Difference]: With dead ends: 245
[2020-08-21 17:19:43,984 INFO  L226             Difference]: Without dead ends: 134
[2020-08-21 17:19:43,986 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=178, Invalid=944, Unknown=0, NotChecked=0, Total=1122
[2020-08-21 17:19:43,986 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 134 states.
[2020-08-21 17:19:43,995 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 120.
[2020-08-21 17:19:43,995 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 120 states.
[2020-08-21 17:19:43,996 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 159 transitions.
[2020-08-21 17:19:43,997 INFO  L78                 Accepts]: Start accepts. Automaton has 120 states and 159 transitions. Word has length 218
[2020-08-21 17:19:44,000 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-21 17:19:44,000 INFO  L479      AbstractCegarLoop]: Abstraction has 120 states and 159 transitions.
[2020-08-21 17:19:44,000 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 16 states.
[2020-08-21 17:19:44,000 INFO  L276                IsEmpty]: Start isEmpty. Operand 120 states and 159 transitions.
[2020-08-21 17:19:44,005 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 261
[2020-08-21 17:19:44,005 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-21 17:19:44,005 INFO  L422         BasicCegarLoop]: trace histogram [19, 19, 18, 18, 16, 15, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 7, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-08-21 17:19:44,006 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16
[2020-08-21 17:19:44,006 INFO  L427      AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-21 17:19:44,006 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-21 17:19:44,006 INFO  L82        PathProgramCache]: Analyzing trace with hash -806788011, now seen corresponding path program 6 times
[2020-08-21 17:19:44,007 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-21 17:19:44,007 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [712027738]
[2020-08-21 17:19:44,007 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-21 17:19:44,031 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:44,084 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-21 17:19:44,085 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:44,086 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5
[2020-08-21 17:19:44,112 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:44,188 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 17:19:44,213 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:44,231 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 17:19:44,256 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:44,281 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 17:19:44,286 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:44,314 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 17:19:44,317 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:44,321 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 17:19:44,322 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:44,324 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 17:19:44,325 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:44,326 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10
[2020-08-21 17:19:44,328 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:44,329 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23
[2020-08-21 17:19:44,339 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:44,341 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37
[2020-08-21 17:19:44,346 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:44,391 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 17:19:44,393 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:44,394 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10
[2020-08-21 17:19:44,395 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:44,400 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64
[2020-08-21 17:19:44,402 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:44,414 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 17:19:44,416 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:44,428 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10
[2020-08-21 17:19:44,429 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:44,437 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92
[2020-08-21 17:19:44,442 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:44,451 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 17:19:44,453 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:44,458 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 17:19:44,459 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:44,463 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 17:19:44,464 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:44,466 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 17:19:44,467 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:44,468 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10
[2020-08-21 17:19:44,468 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:44,469 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23
[2020-08-21 17:19:44,470 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:44,472 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37
[2020-08-21 17:19:44,473 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:44,475 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 17:19:44,476 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:44,477 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10
[2020-08-21 17:19:44,478 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:44,482 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64
[2020-08-21 17:19:44,483 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:44,486 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 17:19:44,487 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:44,488 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10
[2020-08-21 17:19:44,489 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:44,519 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 188
[2020-08-21 17:19:44,526 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:44,532 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 17:19:44,533 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:44,537 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 17:19:44,538 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:44,541 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 17:19:44,542 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:44,543 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10
[2020-08-21 17:19:44,544 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:44,546 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23
[2020-08-21 17:19:44,546 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:44,549 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37
[2020-08-21 17:19:44,550 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:44,553 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 17:19:44,553 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:44,555 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10
[2020-08-21 17:19:44,555 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:44,636 INFO  L134       CoverageAnalysis]: Checked inductivity of 1809 backedges. 177 proven. 317 refuted. 0 times theorem prover too weak. 1315 trivial. 0 not checked.
[2020-08-21 17:19:44,637 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [712027738]
[2020-08-21 17:19:44,637 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-08-21 17:19:44,637 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11
[2020-08-21 17:19:44,638 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744637816]
[2020-08-21 17:19:44,638 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 11 states
[2020-08-21 17:19:44,639 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-21 17:19:44,639 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants.
[2020-08-21 17:19:44,639 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110
[2020-08-21 17:19:44,640 INFO  L87              Difference]: Start difference. First operand 120 states and 159 transitions. Second operand 11 states.
[2020-08-21 17:19:44,947 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-21 17:19:44,948 INFO  L93              Difference]: Finished difference Result 233 states and 321 transitions.
[2020-08-21 17:19:44,948 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. 
[2020-08-21 17:19:44,948 INFO  L78                 Accepts]: Start accepts. Automaton has 11 states. Word has length 260
[2020-08-21 17:19:44,949 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-21 17:19:44,950 INFO  L225             Difference]: With dead ends: 233
[2020-08-21 17:19:44,951 INFO  L226             Difference]: Without dead ends: 122
[2020-08-21 17:19:44,952 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272
[2020-08-21 17:19:44,952 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 122 states.
[2020-08-21 17:19:44,959 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 119.
[2020-08-21 17:19:44,960 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 119 states.
[2020-08-21 17:19:44,961 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 155 transitions.
[2020-08-21 17:19:44,961 INFO  L78                 Accepts]: Start accepts. Automaton has 119 states and 155 transitions. Word has length 260
[2020-08-21 17:19:44,961 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-21 17:19:44,962 INFO  L479      AbstractCegarLoop]: Abstraction has 119 states and 155 transitions.
[2020-08-21 17:19:44,962 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 11 states.
[2020-08-21 17:19:44,962 INFO  L276                IsEmpty]: Start isEmpty. Operand 119 states and 155 transitions.
[2020-08-21 17:19:44,966 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 287
[2020-08-21 17:19:44,966 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-21 17:19:44,967 INFO  L422         BasicCegarLoop]: trace histogram [21, 21, 20, 20, 17, 16, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 7, 6, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-08-21 17:19:44,967 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17
[2020-08-21 17:19:44,967 INFO  L427      AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-21 17:19:44,968 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-21 17:19:44,968 INFO  L82        PathProgramCache]: Analyzing trace with hash -1614185823, now seen corresponding path program 7 times
[2020-08-21 17:19:44,970 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-21 17:19:44,970 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1525618222]
[2020-08-21 17:19:44,971 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-21 17:19:44,987 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:45,075 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-21 17:19:45,075 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:45,076 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5
[2020-08-21 17:19:45,110 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:45,165 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 17:19:45,184 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:45,219 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 17:19:45,228 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:45,248 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 17:19:45,253 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:45,277 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 17:19:45,280 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:45,296 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 17:19:45,298 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:45,333 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 17:19:45,334 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:45,335 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10
[2020-08-21 17:19:45,335 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:45,336 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23
[2020-08-21 17:19:45,337 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:45,339 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37
[2020-08-21 17:19:45,340 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:45,342 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 17:19:45,342 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:45,343 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10
[2020-08-21 17:19:45,343 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:45,347 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64
[2020-08-21 17:19:45,350 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:45,353 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 17:19:45,354 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:45,355 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 17:19:45,356 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:45,357 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10
[2020-08-21 17:19:45,357 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:45,358 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23
[2020-08-21 17:19:45,359 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:45,366 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105
[2020-08-21 17:19:45,370 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:45,375 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 17:19:45,376 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:45,379 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 17:19:45,379 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:45,381 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 17:19:45,381 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:45,382 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10
[2020-08-21 17:19:45,383 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:45,383 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23
[2020-08-21 17:19:45,384 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:45,385 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37
[2020-08-21 17:19:45,386 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:45,388 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 17:19:45,388 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:45,389 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10
[2020-08-21 17:19:45,389 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:45,409 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 173
[2020-08-21 17:19:45,415 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:45,425 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 17:19:45,429 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:45,434 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 17:19:45,435 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:45,438 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 17:19:45,438 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:45,440 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 17:19:45,441 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:45,442 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10
[2020-08-21 17:19:45,442 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:45,443 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23
[2020-08-21 17:19:45,443 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:45,445 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37
[2020-08-21 17:19:45,446 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:45,447 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 17:19:45,447 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:45,448 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10
[2020-08-21 17:19:45,449 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:45,451 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64
[2020-08-21 17:19:45,452 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:45,455 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 17:19:45,456 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:45,458 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 17:19:45,459 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:45,463 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10
[2020-08-21 17:19:45,464 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:45,465 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23
[2020-08-21 17:19:45,465 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 17:19:45,579 INFO  L134       CoverageAnalysis]: Checked inductivity of 2216 backedges. 132 proven. 466 refuted. 0 times theorem prover too weak. 1618 trivial. 0 not checked.
[2020-08-21 17:19:45,580 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1525618222]
[2020-08-21 17:19:45,580 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-08-21 17:19:45,580 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12
[2020-08-21 17:19:45,580 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51103977]
[2020-08-21 17:19:45,581 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 12 states
[2020-08-21 17:19:45,581 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-21 17:19:45,581 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants.
[2020-08-21 17:19:45,582 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132
[2020-08-21 17:19:45,582 INFO  L87              Difference]: Start difference. First operand 119 states and 155 transitions. Second operand 12 states.
[2020-08-21 17:19:45,881 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-21 17:19:45,882 INFO  L93              Difference]: Finished difference Result 141 states and 187 transitions.
[2020-08-21 17:19:45,882 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. 
[2020-08-21 17:19:45,882 INFO  L78                 Accepts]: Start accepts. Automaton has 12 states. Word has length 286
[2020-08-21 17:19:45,883 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-21 17:19:45,884 INFO  L225             Difference]: With dead ends: 141
[2020-08-21 17:19:45,884 INFO  L226             Difference]: Without dead ends: 0
[2020-08-21 17:19:45,885 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306
[2020-08-21 17:19:45,886 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 0 states.
[2020-08-21 17:19:45,886 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0.
[2020-08-21 17:19:45,886 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 0 states.
[2020-08-21 17:19:45,886 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions.
[2020-08-21 17:19:45,886 INFO  L78                 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 286
[2020-08-21 17:19:45,886 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-21 17:19:45,887 INFO  L479      AbstractCegarLoop]: Abstraction has 0 states and 0 transitions.
[2020-08-21 17:19:45,887 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 12 states.
[2020-08-21 17:19:45,887 INFO  L276                IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions.
[2020-08-21 17:19:45,887 INFO  L282                IsEmpty]: Finished isEmpty. No accepting run.
[2020-08-21 17:19:45,887 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18
[2020-08-21 17:19:45,889 INFO  L343    DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.
[2020-08-21 17:19:46,847 WARN  L193               SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 29
[2020-08-21 17:19:47,547 WARN  L193               SmtUtils]: Spent 615.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 32
[2020-08-21 17:19:47,552 INFO  L271        CegarLoopResult]: At program point  ULTIMATE.initFINAL(line -1)  the Hoare annotation is:  true
[2020-08-21 17:19:47,552 INFO  L268        CegarLoopResult]: For program point  ULTIMATE.initEXIT(line -1)  no Hoare annotation was computed.
[2020-08-21 17:19:47,553 INFO  L268        CegarLoopResult]: For program point  ULTIMATE.startEXIT(line -1)  no Hoare annotation was computed.
[2020-08-21 17:19:47,553 INFO  L271        CegarLoopResult]: At program point  L-1(line -1)  the Hoare annotation is:  true
[2020-08-21 17:19:47,553 INFO  L271        CegarLoopResult]: At program point  ULTIMATE.startENTRY(line -1)  the Hoare annotation is:  true
[2020-08-21 17:19:47,553 INFO  L268        CegarLoopResult]: For program point  ULTIMATE.startFINAL(line -1)  no Hoare annotation was computed.
[2020-08-21 17:19:47,553 INFO  L268        CegarLoopResult]: For program point  mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 39)  no Hoare annotation was computed.
[2020-08-21 17:19:47,553 INFO  L271        CegarLoopResult]: At program point  mainENTRY(lines 35 42)  the Hoare annotation is:  true
[2020-08-21 17:19:47,554 INFO  L268        CegarLoopResult]: For program point  mainEXIT(lines 35 42)  no Hoare annotation was computed.
[2020-08-21 17:19:47,554 INFO  L268        CegarLoopResult]: For program point  mainFINAL(lines 35 42)  no Hoare annotation was computed.
[2020-08-21 17:19:47,554 INFO  L268        CegarLoopResult]: For program point  L39(line 39)  no Hoare annotation was computed.
[2020-08-21 17:19:47,554 INFO  L268        CegarLoopResult]: For program point  L38(lines 38 40)  no Hoare annotation was computed.
[2020-08-21 17:19:47,554 INFO  L264        CegarLoopResult]: At program point  L37(line 37)  the Hoare annotation is:  (and (<= 6 main_~x~0) (<= main_~x~0 6))
[2020-08-21 17:19:47,554 INFO  L268        CegarLoopResult]: For program point  L37-1(line 37)  no Hoare annotation was computed.
[2020-08-21 17:19:47,554 INFO  L268        CegarLoopResult]: For program point  L38-2(lines 38 40)  no Hoare annotation was computed.
[2020-08-21 17:19:47,555 INFO  L271        CegarLoopResult]: At program point  fibo2ENTRY(lines 17 25)  the Hoare annotation is:  true
[2020-08-21 17:19:47,555 INFO  L264        CegarLoopResult]: At program point  L23(line 23)  the Hoare annotation is:  (and (= fibo2_~n |fibo2_#in~n|) (< 1 fibo2_~n))
[2020-08-21 17:19:47,555 INFO  L268        CegarLoopResult]: For program point  L23-1(line 23)  no Hoare annotation was computed.
[2020-08-21 17:19:47,556 INFO  L264        CegarLoopResult]: At program point  L23-2(line 23)  the Hoare annotation is:  (and (let ((.cse0 (= fibo2_~n |fibo2_#in~n|))) (or (and (<= 4 fibo2_~n) (<= 2 |fibo2_#t~ret2|) (<= |fibo2_#in~n| 4) (<= |fibo2_#t~ret2| 2) .cse0) (and (<= 3 |fibo2_#t~ret2|) (<= |fibo2_#t~ret2| 3) .cse0 (<= 5 |fibo2_#in~n|)) (and .cse0 (<= 6 |fibo2_#in~n|)) (and (<= |fibo2_#t~ret2| 1) .cse0 (<= 1 |fibo2_#t~ret2|) (<= |fibo2_#in~n| 2)))) (not (<= |fibo2_#in~n| 1)))
[2020-08-21 17:19:47,556 INFO  L268        CegarLoopResult]: For program point  L20(lines 20 24)  no Hoare annotation was computed.
[2020-08-21 17:19:47,556 INFO  L268        CegarLoopResult]: For program point  L23-3(line 23)  no Hoare annotation was computed.
[2020-08-21 17:19:47,556 INFO  L268        CegarLoopResult]: For program point  L18(lines 18 24)  no Hoare annotation was computed.
[2020-08-21 17:19:47,556 INFO  L268        CegarLoopResult]: For program point  fibo2FINAL(lines 17 25)  no Hoare annotation was computed.
[2020-08-21 17:19:47,556 INFO  L268        CegarLoopResult]: For program point  fibo2EXIT(lines 17 25)  no Hoare annotation was computed.
[2020-08-21 17:19:47,556 INFO  L271        CegarLoopResult]: At program point  fibo1ENTRY(lines 7 15)  the Hoare annotation is:  true
[2020-08-21 17:19:47,557 INFO  L264        CegarLoopResult]: At program point  L13(line 13)  the Hoare annotation is:  (and (not (<= |fibo1_#in~n| 1)) (= fibo1_~n |fibo1_#in~n|))
[2020-08-21 17:19:47,557 INFO  L268        CegarLoopResult]: For program point  L13-1(line 13)  no Hoare annotation was computed.
[2020-08-21 17:19:47,557 INFO  L264        CegarLoopResult]: At program point  L13-2(line 13)  the Hoare annotation is:  (and (not (<= |fibo1_#in~n| 1)) (or (and (<= |fibo1_#t~ret0| 1) (<= 1 |fibo1_#t~ret0|) (<= fibo1_~n 3)) (not (<= |fibo1_#in~n| 4)) (and (<= 2 |fibo1_#t~ret0|) (<= |fibo1_#t~ret0| 2) (<= 4 |fibo1_#in~n|))) (let ((.cse0 (= fibo1_~n |fibo1_#in~n|))) (or (and (<= 5 |fibo1_#t~ret0|) (<= |fibo1_#t~ret0| 5) .cse0) (and (<= fibo1_~n 5) .cse0) (and (<= 7 |fibo1_#in~n|) .cse0))))
[2020-08-21 17:19:47,557 INFO  L268        CegarLoopResult]: For program point  fibo1FINAL(lines 7 15)  no Hoare annotation was computed.
[2020-08-21 17:19:47,557 INFO  L268        CegarLoopResult]: For program point  L10(lines 10 14)  no Hoare annotation was computed.
[2020-08-21 17:19:47,557 INFO  L268        CegarLoopResult]: For program point  L13-3(line 13)  no Hoare annotation was computed.
[2020-08-21 17:19:47,558 INFO  L268        CegarLoopResult]: For program point  L8(lines 8 14)  no Hoare annotation was computed.
[2020-08-21 17:19:47,558 INFO  L268        CegarLoopResult]: For program point  fibo1EXIT(lines 7 15)  no Hoare annotation was computed.
[2020-08-21 17:19:47,564 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 05:19:47 BoogieIcfgContainer
[2020-08-21 17:19:47,565 INFO  L132        PluginConnector]: ------------------------ END TraceAbstraction----------------------------
[2020-08-21 17:19:47,566 INFO  L168              Benchmark]: Toolchain (without parser) took 15138.46 ms. Allocated memory was 138.9 MB in the beginning and 520.6 MB in the end (delta: 381.7 MB). Free memory was 102.3 MB in the beginning and 469.6 MB in the end (delta: -367.3 MB). Peak memory consumption was 397.0 MB. Max. memory is 7.1 GB.
[2020-08-21 17:19:47,567 INFO  L168              Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 138.9 MB. Free memory was 120.5 MB in the beginning and 120.3 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB.
[2020-08-21 17:19:47,568 INFO  L168              Benchmark]: CACSL2BoogieTranslator took 255.08 ms. Allocated memory is still 138.9 MB. Free memory was 102.1 MB in the beginning and 92.6 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB.
[2020-08-21 17:19:47,568 INFO  L168              Benchmark]: Boogie Preprocessor took 115.30 ms. Allocated memory was 138.9 MB in the beginning and 202.4 MB in the end (delta: 63.4 MB). Free memory was 92.4 MB in the beginning and 181.0 MB in the end (delta: -88.6 MB). Peak memory consumption was 13.2 MB. Max. memory is 7.1 GB.
[2020-08-21 17:19:47,569 INFO  L168              Benchmark]: RCFGBuilder took 288.87 ms. Allocated memory is still 202.4 MB. Free memory was 181.0 MB in the beginning and 167.9 MB in the end (delta: 13.2 MB). Peak memory consumption was 13.2 MB. Max. memory is 7.1 GB.
[2020-08-21 17:19:47,570 INFO  L168              Benchmark]: TraceAbstraction took 14474.21 ms. Allocated memory was 202.4 MB in the beginning and 520.6 MB in the end (delta: 318.2 MB). Free memory was 167.2 MB in the beginning and 469.6 MB in the end (delta: -302.4 MB). Peak memory consumption was 398.5 MB. Max. memory is 7.1 GB.
[2020-08-21 17:19:47,572 INFO  L336   ainManager$Toolchain]: #######################  End [Toolchain 1] #######################
 --- Results ---
 * Results from de.uni_freiburg.informatik.ultimate.core:
  - StatisticsResult: Toolchain Benchmarks
    Benchmark results are:
 * CDTParser took 0.27 ms. Allocated memory is still 138.9 MB. Free memory was 120.5 MB in the beginning and 120.3 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB.
 * CACSL2BoogieTranslator took 255.08 ms. Allocated memory is still 138.9 MB. Free memory was 102.1 MB in the beginning and 92.6 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB.
 * Boogie Preprocessor took 115.30 ms. Allocated memory was 138.9 MB in the beginning and 202.4 MB in the end (delta: 63.4 MB). Free memory was 92.4 MB in the beginning and 181.0 MB in the end (delta: -88.6 MB). Peak memory consumption was 13.2 MB. Max. memory is 7.1 GB.
 * RCFGBuilder took 288.87 ms. Allocated memory is still 202.4 MB. Free memory was 181.0 MB in the beginning and 167.9 MB in the end (delta: 13.2 MB). Peak memory consumption was 13.2 MB. Max. memory is 7.1 GB.
 * TraceAbstraction took 14474.21 ms. Allocated memory was 202.4 MB in the beginning and 520.6 MB in the end (delta: 318.2 MB). Free memory was 167.2 MB in the beginning and 469.6 MB in the end (delta: -302.4 MB). Peak memory consumption was 398.5 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, 33 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 12.7s, OverallIterations: 19, TraceHistogramMax: 21, AutomataDifference: 5.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 1.6s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 635 SDtfs, 595 SDslu, 4388 SDs, 0 SdLazy, 4332 SolverSat, 446 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 973 GetRequests, 691 SyntacticMatches, 0 SemanticMatches, 282 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 711 ImplicationChecksByTransitivity, 3.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=120occurred in iteration=17, 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, 19 MinimizatonAttempts, 98 StatesRemovedByMinimization, 15 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 11 LocationsWithAnnotation, 647 PreInvPairs, 912 NumberOfFragments, 138 HoareAnnotationTreeSize, 647 FomulaSimplifications, 2845 FormulaSimplificationTreeSizeReduction, 0.5s HoareSimplificationTime, 11 FomulaSimplificationsInter, 4707 FormulaSimplificationTreeSizeReductionInter, 1.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 5.7s InterpolantComputationTime, 2097 NumberOfCodeBlocks, 2097 NumberOfCodeBlocksAsserted, 19 NumberOfCheckSat, 2078 ConstructedInterpolants, 0 QuantifiedInterpolants, 641722 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 19 InterpolantComputations, 2 PerfectInterpolantSequences, 6946/9383 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...