/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --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/Fibonacci04.c


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


This is Ultimate 0.1.25-c90d42b
[2020-09-24 17:01:37,900 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2020-09-24 17:01:37,904 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2020-09-24 17:01:37,931 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2020-09-24 17:01:37,931 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2020-09-24 17:01:37,932 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2020-09-24 17:01:37,934 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2020-09-24 17:01:37,936 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2020-09-24 17:01:37,938 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2020-09-24 17:01:37,939 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
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[2020-09-24 17:01:37,942 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2020-09-24 17:01:37,942 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2020-09-24 17:01:37,943 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2020-09-24 17:01:37,944 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2020-09-24 17:01:37,946 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2020-09-24 17:01:37,947 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2020-09-24 17:01:37,948 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2020-09-24 17:01:37,950 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2020-09-24 17:01:37,952 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2020-09-24 17:01:37,953 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2020-09-24 17:01:37,955 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2020-09-24 17:01:37,956 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2020-09-24 17:01:37,957 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2020-09-24 17:01:37,963 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2020-09-24 17:01:37,963 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2020-09-24 17:01:37,963 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2020-09-24 17:01:37,966 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2020-09-24 17:01:37,967 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2020-09-24 17:01:37,968 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2020-09-24 17:01:37,968 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2020-09-24 17:01:37,971 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2020-09-24 17:01:37,972 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2020-09-24 17:01:37,973 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2020-09-24 17:01:37,975 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2020-09-24 17:01:37,975 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
[2020-09-24 17:01:37,976 INFO  L184        SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
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[2020-09-24 17:01:37,977 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
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[2020-09-24 17:01:37,981 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2020-09-24 17:01:37,982 INFO  L101        SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf
[2020-09-24 17:01:38,045 INFO  L113        SettingsManager]: Loading preferences was successful
[2020-09-24 17:01:38,046 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2020-09-24 17:01:38,048 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2020-09-24 17:01:38,048 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2020-09-24 17:01:38,048 INFO  L138        SettingsManager]:  * Use SBE=true
[2020-09-24 17:01:38,048 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2020-09-24 17:01:38,048 INFO  L138        SettingsManager]:  * sizeof long=4
[2020-09-24 17:01:38,049 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2020-09-24 17:01:38,049 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2020-09-24 17:01:38,049 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2020-09-24 17:01:38,049 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2020-09-24 17:01:38,049 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2020-09-24 17:01:38,050 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2020-09-24 17:01:38,051 INFO  L138        SettingsManager]:  * sizeof long double=12
[2020-09-24 17:01:38,051 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2020-09-24 17:01:38,051 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2020-09-24 17:01:38,051 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2020-09-24 17:01:38,052 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2020-09-24 17:01:38,052 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2020-09-24 17:01:38,052 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2020-09-24 17:01:38,052 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2020-09-24 17:01:38,053 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-09-24 17:01:38,053 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2020-09-24 17:01:38,053 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2020-09-24 17:01:38,053 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2020-09-24 17:01:38,053 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2020-09-24 17:01:38,054 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-09-24 17:01:38,054 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2020-09-24 17:01:38,055 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2020-09-24 17:01:38,055 INFO  L138        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SingleStatement
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;log-additional-information=true;
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;log-additional-information=true;
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;log-additional-information=true;
[2020-09-24 17:01:38,584 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2020-09-24 17:01:38,610 INFO  L258   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2020-09-24 17:01:38,615 INFO  L214   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2020-09-24 17:01:38,617 INFO  L271        PluginConnector]: Initializing CDTParser...
[2020-09-24 17:01:38,619 INFO  L275        PluginConnector]: CDTParser initialized
[2020-09-24 17:01:38,620 INFO  L429   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/Fibonacci04.c
[2020-09-24 17:01:38,719 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/95f9c1827/b5f18506aba1456cb8dd4d0e40ae1505/FLAG6f7815d79
[2020-09-24 17:01:39,275 INFO  L306              CDTParser]: Found 1 translation units.
[2020-09-24 17:01:39,276 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive/Fibonacci04.c
[2020-09-24 17:01:39,285 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/95f9c1827/b5f18506aba1456cb8dd4d0e40ae1505/FLAG6f7815d79
[2020-09-24 17:01:39,611 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/95f9c1827/b5f18506aba1456cb8dd4d0e40ae1505
[2020-09-24 17:01:39,627 INFO  L296   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2020-09-24 17:01:39,634 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2020-09-24 17:01:39,635 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2020-09-24 17:01:39,635 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2020-09-24 17:01:39,641 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2020-09-24 17:01:39,643 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 05:01:39" (1/1) ...
[2020-09-24 17:01:39,647 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5cb7919e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:01:39, skipping insertion in model container
[2020-09-24 17:01:39,648 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 05:01:39" (1/1) ...
[2020-09-24 17:01:39,657 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2020-09-24 17:01:39,682 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2020-09-24 17:01:39,964 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-09-24 17:01:39,975 INFO  L203         MainTranslator]: Completed pre-run
[2020-09-24 17:01:40,001 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-09-24 17:01:40,021 INFO  L208         MainTranslator]: Completed translation
[2020-09-24 17:01:40,023 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:01:40 WrapperNode
[2020-09-24 17:01:40,023 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2020-09-24 17:01:40,024 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2020-09-24 17:01:40,024 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2020-09-24 17:01:40,024 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2020-09-24 17:01:40,044 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:01:40" (1/1) ...
[2020-09-24 17:01:40,046 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:01:40" (1/1) ...
[2020-09-24 17:01:40,053 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:01:40" (1/1) ...
[2020-09-24 17:01:40,054 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:01:40" (1/1) ...
[2020-09-24 17:01:40,132 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:01:40" (1/1) ...
[2020-09-24 17:01:40,136 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:01:40" (1/1) ...
[2020-09-24 17:01:40,138 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:01:40" (1/1) ...
[2020-09-24 17:01:40,144 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2020-09-24 17:01:40,145 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2020-09-24 17:01:40,145 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2020-09-24 17:01:40,145 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2020-09-24 17:01:40,146 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:01:40" (1/1) ...
No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-09-24 17:01:40,242 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2020-09-24 17:01:40,242 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2020-09-24 17:01:40,243 INFO  L138     BoogieDeclarations]: Found implementation of procedure fibonacci
[2020-09-24 17:01:40,243 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2020-09-24 17:01:40,243 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2020-09-24 17:01:40,243 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int
[2020-09-24 17:01:40,243 INFO  L130     BoogieDeclarations]: Found specification of procedure fibonacci
[2020-09-24 17:01:40,243 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2020-09-24 17:01:40,244 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2020-09-24 17:01:40,244 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2020-09-24 17:01:40,457 INFO  L290             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2020-09-24 17:01:40,457 INFO  L295             CfgBuilder]: Removed 0 assume(true) statements.
[2020-09-24 17:01:40,462 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 05:01:40 BoogieIcfgContainer
[2020-09-24 17:01:40,463 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2020-09-24 17:01:40,464 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2020-09-24 17:01:40,464 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2020-09-24 17:01:40,468 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2020-09-24 17:01:40,468 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 05:01:39" (1/3) ...
[2020-09-24 17:01:40,469 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22f1e7ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 05:01:40, skipping insertion in model container
[2020-09-24 17:01:40,470 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:01:40" (2/3) ...
[2020-09-24 17:01:40,470 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22f1e7ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 05:01:40, skipping insertion in model container
[2020-09-24 17:01:40,471 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 05:01:40" (3/3) ...
[2020-09-24 17:01:40,474 INFO  L109   eAbstractionObserver]: Analyzing ICFG Fibonacci04.c
[2020-09-24 17:01:40,487 INFO  L157   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION
[2020-09-24 17:01:40,498 INFO  L169   ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2020-09-24 17:01:40,546 INFO  L251      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2020-09-24 17:01:40,619 INFO  L375      AbstractCegarLoop]: Interprodecural is true
[2020-09-24 17:01:40,620 INFO  L376      AbstractCegarLoop]: Hoare is true
[2020-09-24 17:01:40,620 INFO  L377      AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation
[2020-09-24 17:01:40,620 INFO  L378      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2020-09-24 17:01:40,620 INFO  L379      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2020-09-24 17:01:40,620 INFO  L380      AbstractCegarLoop]: Difference is false
[2020-09-24 17:01:40,621 INFO  L381      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2020-09-24 17:01:40,621 INFO  L385      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2020-09-24 17:01:40,648 INFO  L276                IsEmpty]: Start isEmpty. Operand 33 states.
[2020-09-24 17:01:40,656 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 19
[2020-09-24 17:01:40,656 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-24 17:01:40,658 INFO  L422         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-24 17:01:40,658 INFO  L427      AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 17:01:40,665 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 17:01:40,666 INFO  L82        PathProgramCache]: Analyzing trace with hash -2064988448, now seen corresponding path program 1 times
[2020-09-24 17:01:40,675 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 17:01:40,676 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1107734605]
[2020-09-24 17:01:40,676 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 17:01:40,804 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 17:01:40,831 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:01:40,923 FATAL L256   erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set)
[2020-09-24 17:01:40,923 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 27
[2020-09-24 17:01:40,924 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 17:01:40,924 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 114
[2020-09-24 17:01:40,925 FATAL L256   erpolLogProxyWrapper]: Heuristic: RANDOM
[2020-09-24 17:01:40,926 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 4
[2020-09-24 17:01:40,926 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 15
[2020-09-24 17:01:40,926 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 11
[2020-09-24 17:01:40,926 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 2
[2020-09-24 17:01:40,994 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-24 17:01:40,995 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 17:01:40,997 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:01:41,000 FATAL L256   erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set)
[2020-09-24 17:01:41,000 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 8
[2020-09-24 17:01:41,000 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 17:01:41,000 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 3
[2020-09-24 17:01:41,001 FATAL L256   erpolLogProxyWrapper]: Heuristic: RANDOM
[2020-09-24 17:01:41,001 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-24 17:01:41,001 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 17:01:41,001 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-24 17:01:41,002 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-24 17:01:41,006 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7
[2020-09-24 17:01:41,011 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 17:01:41,016 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:01:41,029 FATAL L256   erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set)
[2020-09-24 17:01:41,030 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 11
[2020-09-24 17:01:41,030 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 17:01:41,030 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 16
[2020-09-24 17:01:41,030 FATAL L256   erpolLogProxyWrapper]: Heuristic: RANDOM
[2020-09-24 17:01:41,031 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 4
[2020-09-24 17:01:41,031 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 17:01:41,031 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 8
[2020-09-24 17:01:41,032 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-24 17:01:41,064 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-09-24 17:01:41,065 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1107734605]
[2020-09-24 17:01:41,067 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-09-24 17:01:41,067 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2020-09-24 17:01:41,069 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057398788]
[2020-09-24 17:01:41,076 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 5 states
[2020-09-24 17:01:41,077 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-24 17:01:41,096 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2020-09-24 17:01:41,098 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2020-09-24 17:01:41,101 INFO  L87              Difference]: Start difference. First operand 33 states. Second operand 5 states.
[2020-09-24 17:01:41,245 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-24 17:01:41,245 INFO  L93              Difference]: Finished difference Result 48 states and 54 transitions.
[2020-09-24 17:01:41,246 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2020-09-24 17:01:41,248 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 18
[2020-09-24 17:01:41,249 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-24 17:01:41,261 INFO  L225             Difference]: With dead ends: 48
[2020-09-24 17:01:41,262 INFO  L226             Difference]: Without dead ends: 30
[2020-09-24 17:01:41,267 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30
[2020-09-24 17:01:41,290 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 30 states.
[2020-09-24 17:01:41,320 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30.
[2020-09-24 17:01:41,322 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 30 states.
[2020-09-24 17:01:41,324 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions.
[2020-09-24 17:01:41,326 INFO  L78                 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 18
[2020-09-24 17:01:41,327 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-09-24 17:01:41,327 INFO  L479      AbstractCegarLoop]: Abstraction has 30 states and 34 transitions.
[2020-09-24 17:01:41,327 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2020-09-24 17:01:41,328 INFO  L276                IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions.
[2020-09-24 17:01:41,330 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 20
[2020-09-24 17:01:41,330 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-24 17:01:41,331 INFO  L422         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-24 17:01:41,331 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2020-09-24 17:01:41,331 INFO  L427      AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 17:01:41,332 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 17:01:41,332 INFO  L82        PathProgramCache]: Analyzing trace with hash -1678486471, now seen corresponding path program 1 times
[2020-09-24 17:01:41,332 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 17:01:41,333 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1718196449]
[2020-09-24 17:01:41,333 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 17:01:41,351 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 17:01:41,371 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:01:41,523 FATAL L256   erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set)
[2020-09-24 17:01:41,526 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 28
[2020-09-24 17:01:41,526 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 17:01:41,526 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 170
[2020-09-24 17:01:41,527 FATAL L256   erpolLogProxyWrapper]: Heuristic: RANDOM
[2020-09-24 17:01:41,527 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 4
[2020-09-24 17:01:41,527 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 15
[2020-09-24 17:01:41,527 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 12
[2020-09-24 17:01:41,528 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-24 17:01:41,562 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-24 17:01:41,563 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 17:01:41,565 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:01:41,566 FATAL L256   erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set)
[2020-09-24 17:01:41,567 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 8
[2020-09-24 17:01:41,567 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 17:01:41,567 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 2
[2020-09-24 17:01:41,567 FATAL L256   erpolLogProxyWrapper]: Heuristic: RANDOM
[2020-09-24 17:01:41,568 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-24 17:01:41,568 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 17:01:41,568 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-24 17:01:41,569 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-24 17:01:41,570 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7
[2020-09-24 17:01:41,574 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 17:01:41,578 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:01:41,605 FATAL L256   erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set)
[2020-09-24 17:01:41,605 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 12
[2020-09-24 17:01:41,605 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 17:01:41,606 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 30
[2020-09-24 17:01:41,606 FATAL L256   erpolLogProxyWrapper]: Heuristic: RANDOM
[2020-09-24 17:01:41,606 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 4
[2020-09-24 17:01:41,607 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 17:01:41,607 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 9
[2020-09-24 17:01:41,607 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-24 17:01:41,628 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-09-24 17:01:41,629 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1718196449]
[2020-09-24 17:01:41,629 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-09-24 17:01:41,630 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2020-09-24 17:01:41,630 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623602783]
[2020-09-24 17:01:41,632 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 5 states
[2020-09-24 17:01:41,632 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-24 17:01:41,633 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2020-09-24 17:01:41,633 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2020-09-24 17:01:41,633 INFO  L87              Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 5 states.
[2020-09-24 17:01:41,703 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-24 17:01:41,703 INFO  L93              Difference]: Finished difference Result 38 states and 43 transitions.
[2020-09-24 17:01:41,704 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2020-09-24 17:01:41,704 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 19
[2020-09-24 17:01:41,704 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-24 17:01:41,706 INFO  L225             Difference]: With dead ends: 38
[2020-09-24 17:01:41,706 INFO  L226             Difference]: Without dead ends: 32
[2020-09-24 17:01:41,707 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30
[2020-09-24 17:01:41,708 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 32 states.
[2020-09-24 17:01:41,714 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30.
[2020-09-24 17:01:41,714 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 30 states.
[2020-09-24 17:01:41,716 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions.
[2020-09-24 17:01:41,716 INFO  L78                 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 19
[2020-09-24 17:01:41,716 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-09-24 17:01:41,716 INFO  L479      AbstractCegarLoop]: Abstraction has 30 states and 34 transitions.
[2020-09-24 17:01:41,717 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2020-09-24 17:01:41,717 INFO  L276                IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions.
[2020-09-24 17:01:41,718 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 36
[2020-09-24 17:01:41,719 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-24 17:01:41,719 INFO  L422         BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-24 17:01:41,719 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2020-09-24 17:01:41,720 INFO  L427      AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 17:01:41,720 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 17:01:41,720 INFO  L82        PathProgramCache]: Analyzing trace with hash 961212118, now seen corresponding path program 1 times
[2020-09-24 17:01:41,721 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 17:01:41,721 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [498285712]
[2020-09-24 17:01:41,721 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 17:01:41,733 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 17:01:41,744 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:01:41,849 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:01:41,909 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:01:42,325 FATAL L256   erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set)
[2020-09-24 17:01:42,325 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 48
[2020-09-24 17:01:42,326 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 3
[2020-09-24 17:01:42,326 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 589
[2020-09-24 17:01:42,326 FATAL L256   erpolLogProxyWrapper]: Heuristic: RANDOM
[2020-09-24 17:01:42,326 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 6
[2020-09-24 17:01:42,326 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 15
[2020-09-24 17:01:42,327 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 32
[2020-09-24 17:01:42,327 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-24 17:01:42,347 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-24 17:01:42,348 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 17:01:42,349 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:01:42,351 FATAL L256   erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set)
[2020-09-24 17:01:42,351 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 8
[2020-09-24 17:01:42,351 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 17:01:42,352 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 2
[2020-09-24 17:01:42,352 FATAL L256   erpolLogProxyWrapper]: Heuristic: RANDOM
[2020-09-24 17:01:42,353 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-24 17:01:42,353 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 17:01:42,353 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-24 17:01:42,354 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-24 17:01:42,356 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7
[2020-09-24 17:01:42,363 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 17:01:42,369 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:01:42,420 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:01:42,469 FATAL L256   erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set)
[2020-09-24 17:01:42,469 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 32
[2020-09-24 17:01:42,470 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 2
[2020-09-24 17:01:42,470 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 104
[2020-09-24 17:01:42,470 FATAL L256   erpolLogProxyWrapper]: Heuristic: RANDOM
[2020-09-24 17:01:42,470 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 5
[2020-09-24 17:01:42,471 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 4
[2020-09-24 17:01:42,471 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 7
[2020-09-24 17:01:42,471 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-24 17:01:42,500 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-09-24 17:01:42,502 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 17:01:42,505 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:01:42,513 FATAL L256   erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set)
[2020-09-24 17:01:42,513 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 11
[2020-09-24 17:01:42,513 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 17:01:42,514 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 9
[2020-09-24 17:01:42,514 FATAL L256   erpolLogProxyWrapper]: Heuristic: RANDOM
[2020-09-24 17:01:42,514 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 4
[2020-09-24 17:01:42,515 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 3
[2020-09-24 17:01:42,515 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 7
[2020-09-24 17:01:42,516 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-24 17:01:42,540 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10
[2020-09-24 17:01:42,542 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 17:01:42,545 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:01:42,550 FATAL L256   erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set)
[2020-09-24 17:01:42,551 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 11
[2020-09-24 17:01:42,551 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 17:01:42,551 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 6
[2020-09-24 17:01:42,552 FATAL L256   erpolLogProxyWrapper]: Heuristic: RANDOM
[2020-09-24 17:01:42,552 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-24 17:01:42,552 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 8
[2020-09-24 17:01:42,553 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-24 17:01:42,553 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-24 17:01:42,560 INFO  L134       CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked.
[2020-09-24 17:01:42,560 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [498285712]
[2020-09-24 17:01:42,561 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-09-24 17:01:42,561 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7
[2020-09-24 17:01:42,561 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493351097]
[2020-09-24 17:01:42,562 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 7 states
[2020-09-24 17:01:42,562 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-24 17:01:42,563 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2020-09-24 17:01:42,563 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42
[2020-09-24 17:01:42,563 INFO  L87              Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 7 states.
[2020-09-24 17:01:42,670 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-24 17:01:42,670 INFO  L93              Difference]: Finished difference Result 54 states and 65 transitions.
[2020-09-24 17:01:42,671 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2020-09-24 17:01:42,671 INFO  L78                 Accepts]: Start accepts. Automaton has 7 states. Word has length 35
[2020-09-24 17:01:42,672 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-24 17:01:42,673 INFO  L225             Difference]: With dead ends: 54
[2020-09-24 17:01:42,673 INFO  L226             Difference]: Without dead ends: 32
[2020-09-24 17:01:42,674 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90
[2020-09-24 17:01:42,675 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 32 states.
[2020-09-24 17:01:42,681 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32.
[2020-09-24 17:01:42,681 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 32 states.
[2020-09-24 17:01:42,683 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions.
[2020-09-24 17:01:42,683 INFO  L78                 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 35
[2020-09-24 17:01:42,684 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-09-24 17:01:42,684 INFO  L479      AbstractCegarLoop]: Abstraction has 32 states and 36 transitions.
[2020-09-24 17:01:42,684 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 7 states.
[2020-09-24 17:01:42,684 INFO  L276                IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions.
[2020-09-24 17:01:42,686 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 37
[2020-09-24 17:01:42,686 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-24 17:01:42,686 INFO  L422         BasicCegarLoop]: trace histogram [3, 3, 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]
[2020-09-24 17:01:42,687 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2020-09-24 17:01:42,687 INFO  L427      AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 17:01:42,687 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 17:01:42,687 INFO  L82        PathProgramCache]: Analyzing trace with hash -125795935, now seen corresponding path program 1 times
[2020-09-24 17:01:42,688 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 17:01:42,688 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [326975744]
[2020-09-24 17:01:42,688 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 17:01:42,698 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 17:01:42,707 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:01:42,726 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:01:43,068 FATAL L256   erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set)
[2020-09-24 17:01:43,069 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 49
[2020-09-24 17:01:43,069 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 2
[2020-09-24 17:01:43,069 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 368
[2020-09-24 17:01:43,069 FATAL L256   erpolLogProxyWrapper]: Heuristic: RANDOM
[2020-09-24 17:01:43,070 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 6
[2020-09-24 17:01:43,070 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 15
[2020-09-24 17:01:43,070 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 33
[2020-09-24 17:01:43,070 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-24 17:01:43,086 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-24 17:01:43,087 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 17:01:43,088 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:01:43,089 FATAL L256   erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set)
[2020-09-24 17:01:43,090 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 8
[2020-09-24 17:01:43,090 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 17:01:43,090 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 2
[2020-09-24 17:01:43,091 FATAL L256   erpolLogProxyWrapper]: Heuristic: RANDOM
[2020-09-24 17:01:43,091 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-24 17:01:43,091 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 17:01:43,091 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-24 17:01:43,091 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-24 17:01:43,093 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7
[2020-09-24 17:01:43,098 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 17:01:43,104 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:01:43,125 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:01:43,372 FATAL L256   erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set)
[2020-09-24 17:01:43,373 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 33
[2020-09-24 17:01:43,373 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 2
[2020-09-24 17:01:43,374 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 273
[2020-09-24 17:01:43,374 FATAL L256   erpolLogProxyWrapper]: Heuristic: RANDOM
[2020-09-24 17:01:43,374 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 6
[2020-09-24 17:01:43,374 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 17:01:43,375 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 30
[2020-09-24 17:01:43,375 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-24 17:01:43,430 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-09-24 17:01:43,432 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 17:01:43,436 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:01:43,467 FATAL L256   erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set)
[2020-09-24 17:01:43,468 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 12
[2020-09-24 17:01:43,468 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 17:01:43,469 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 34
[2020-09-24 17:01:43,469 FATAL L256   erpolLogProxyWrapper]: Heuristic: RANDOM
[2020-09-24 17:01:43,469 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 5
[2020-09-24 17:01:43,470 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 17:01:43,470 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 9
[2020-09-24 17:01:43,470 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-24 17:01:43,517 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11
[2020-09-24 17:01:43,519 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 17:01:43,521 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:01:43,525 FATAL L256   erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set)
[2020-09-24 17:01:43,526 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 11
[2020-09-24 17:01:43,526 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 17:01:43,526 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 5
[2020-09-24 17:01:43,526 FATAL L256   erpolLogProxyWrapper]: Heuristic: RANDOM
[2020-09-24 17:01:43,527 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 2
[2020-09-24 17:01:43,527 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 17:01:43,527 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 7
[2020-09-24 17:01:43,527 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-24 17:01:43,538 INFO  L134       CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked.
[2020-09-24 17:01:43,540 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [326975744]
[2020-09-24 17:01:43,540 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-09-24 17:01:43,540 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7
[2020-09-24 17:01:43,541 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487300926]
[2020-09-24 17:01:43,542 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 7 states
[2020-09-24 17:01:43,543 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-24 17:01:43,543 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2020-09-24 17:01:43,545 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42
[2020-09-24 17:01:43,545 INFO  L87              Difference]: Start difference. First operand 32 states and 36 transitions. Second operand 7 states.
[2020-09-24 17:01:43,681 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-24 17:01:43,681 INFO  L93              Difference]: Finished difference Result 46 states and 55 transitions.
[2020-09-24 17:01:43,682 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2020-09-24 17:01:43,682 INFO  L78                 Accepts]: Start accepts. Automaton has 7 states. Word has length 36
[2020-09-24 17:01:43,683 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-24 17:01:43,687 INFO  L225             Difference]: With dead ends: 46
[2020-09-24 17:01:43,687 INFO  L226             Difference]: Without dead ends: 40
[2020-09-24 17:01:43,688 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72
[2020-09-24 17:01:43,688 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 40 states.
[2020-09-24 17:01:43,705 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40.
[2020-09-24 17:01:43,705 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 40 states.
[2020-09-24 17:01:43,711 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 49 transitions.
[2020-09-24 17:01:43,711 INFO  L78                 Accepts]: Start accepts. Automaton has 40 states and 49 transitions. Word has length 36
[2020-09-24 17:01:43,711 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-09-24 17:01:43,712 INFO  L479      AbstractCegarLoop]: Abstraction has 40 states and 49 transitions.
[2020-09-24 17:01:43,714 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 7 states.
[2020-09-24 17:01:43,714 INFO  L276                IsEmpty]: Start isEmpty. Operand 40 states and 49 transitions.
[2020-09-24 17:01:43,716 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 54
[2020-09-24 17:01:43,717 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-24 17:01:43,718 INFO  L422         BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-24 17:01:43,719 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3
[2020-09-24 17:01:43,719 INFO  L427      AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 17:01:43,719 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 17:01:43,720 INFO  L82        PathProgramCache]: Analyzing trace with hash 331377205, now seen corresponding path program 2 times
[2020-09-24 17:01:43,720 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 17:01:43,721 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [563802440]
[2020-09-24 17:01:43,721 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 17:01:43,734 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 17:01:43,751 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:01:43,787 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:01:43,846 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:01:43,909 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:01:44,579 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:01:44,635 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:01:45,643 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:01:48,406 FATAL L256   erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set)
[2020-09-24 17:01:48,407 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 70
[2020-09-24 17:01:48,407 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 7
[2020-09-24 17:01:48,407 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 4665
[2020-09-24 17:01:48,407 FATAL L256   erpolLogProxyWrapper]: Heuristic: RANDOM
[2020-09-24 17:01:48,407 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 8
[2020-09-24 17:01:48,416 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 21
[2020-09-24 17:01:48,416 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 35
[2020-09-24 17:01:48,417 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 9
[2020-09-24 17:01:48,426 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-24 17:01:48,427 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 17:01:48,428 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:01:48,429 FATAL L256   erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set)
[2020-09-24 17:01:48,430 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 8
[2020-09-24 17:01:48,430 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 17:01:48,430 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 2
[2020-09-24 17:01:48,430 FATAL L256   erpolLogProxyWrapper]: Heuristic: RANDOM
[2020-09-24 17:01:48,430 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-24 17:01:48,431 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 17:01:48,431 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-24 17:01:48,431 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-24 17:01:48,433 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7
[2020-09-24 17:01:48,445 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 17:01:48,456 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:01:48,497 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:01:48,517 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:01:48,533 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:01:49,565 FATAL L256   erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set)
[2020-09-24 17:01:49,565 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 54
[2020-09-24 17:01:49,566 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 4
[2020-09-24 17:01:49,566 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 1116
[2020-09-24 17:01:49,566 FATAL L256   erpolLogProxyWrapper]: Heuristic: RANDOM
[2020-09-24 17:01:49,566 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 8
[2020-09-24 17:01:49,567 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 7
[2020-09-24 17:01:49,567 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 35
[2020-09-24 17:01:49,567 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-24 17:01:49,582 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-09-24 17:01:49,586 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 17:01:49,591 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:01:49,605 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:01:49,626 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:01:49,872 FATAL L256   erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set)
[2020-09-24 17:01:49,872 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 33
[2020-09-24 17:01:49,872 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 3
[2020-09-24 17:01:49,873 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 284
[2020-09-24 17:01:49,873 FATAL L256   erpolLogProxyWrapper]: Heuristic: RANDOM
[2020-09-24 17:01:49,873 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 6
[2020-09-24 17:01:49,873 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 17:01:49,874 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 30
[2020-09-24 17:01:49,874 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-24 17:01:49,894 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-09-24 17:01:49,896 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 17:01:49,899 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:01:49,909 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:01:49,938 FATAL L256   erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set)
[2020-09-24 17:01:49,938 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 12
[2020-09-24 17:01:49,938 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 2
[2020-09-24 17:01:49,938 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 40
[2020-09-24 17:01:49,939 FATAL L256   erpolLogProxyWrapper]: Heuristic: RANDOM
[2020-09-24 17:01:49,939 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 5
[2020-09-24 17:01:49,939 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 17:01:49,939 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 9
[2020-09-24 17:01:49,940 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-24 17:01:49,952 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11
[2020-09-24 17:01:49,953 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 17:01:49,955 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:01:49,976 FATAL L256   erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set)
[2020-09-24 17:01:49,977 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 11
[2020-09-24 17:01:49,977 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 17:01:49,977 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 22
[2020-09-24 17:01:49,978 FATAL L256   erpolLogProxyWrapper]: Heuristic: RANDOM
[2020-09-24 17:01:49,978 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 2
[2020-09-24 17:01:49,978 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 17:01:49,978 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 7
[2020-09-24 17:01:49,979 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-24 17:01:49,982 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28
[2020-09-24 17:01:49,983 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 17:01:49,985 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:01:49,989 FATAL L256   erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set)
[2020-09-24 17:01:49,990 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 11
[2020-09-24 17:01:49,990 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 17:01:49,990 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 5
[2020-09-24 17:01:49,990 FATAL L256   erpolLogProxyWrapper]: Heuristic: RANDOM
[2020-09-24 17:01:49,991 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 4
[2020-09-24 17:01:49,991 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 3
[2020-09-24 17:01:49,991 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 7
[2020-09-24 17:01:49,991 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-24 17:01:50,020 INFO  L134       CoverageAnalysis]: Checked inductivity of 51 backedges. 26 proven. 13 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked.
[2020-09-24 17:01:50,020 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [563802440]
[2020-09-24 17:01:50,021 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-09-24 17:01:50,021 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8
[2020-09-24 17:01:50,021 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261880119]
[2020-09-24 17:01:50,023 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 8 states
[2020-09-24 17:01:50,023 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-24 17:01:50,023 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2020-09-24 17:01:50,024 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56
[2020-09-24 17:01:50,024 INFO  L87              Difference]: Start difference. First operand 40 states and 49 transitions. Second operand 8 states.
[2020-09-24 17:01:50,220 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-24 17:01:50,220 INFO  L93              Difference]: Finished difference Result 80 states and 107 transitions.
[2020-09-24 17:01:50,221 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. 
[2020-09-24 17:01:50,221 INFO  L78                 Accepts]: Start accepts. Automaton has 8 states. Word has length 53
[2020-09-24 17:01:50,222 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-24 17:01:50,223 INFO  L225             Difference]: With dead ends: 80
[2020-09-24 17:01:50,223 INFO  L226             Difference]: Without dead ends: 48
[2020-09-24 17:01:50,226 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156
[2020-09-24 17:01:50,227 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 48 states.
[2020-09-24 17:01:50,241 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 42.
[2020-09-24 17:01:50,241 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 42 states.
[2020-09-24 17:01:50,245 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions.
[2020-09-24 17:01:50,245 INFO  L78                 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 53
[2020-09-24 17:01:50,247 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-09-24 17:01:50,247 INFO  L479      AbstractCegarLoop]: Abstraction has 42 states and 50 transitions.
[2020-09-24 17:01:50,248 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 8 states.
[2020-09-24 17:01:50,248 INFO  L276                IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions.
[2020-09-24 17:01:50,251 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 90
[2020-09-24 17:01:50,256 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-24 17:01:50,256 INFO  L422         BasicCegarLoop]: trace histogram [9, 9, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-24 17:01:50,256 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4
[2020-09-24 17:01:50,257 INFO  L427      AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 17:01:50,257 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 17:01:50,257 INFO  L82        PathProgramCache]: Analyzing trace with hash 4423077, now seen corresponding path program 3 times
[2020-09-24 17:01:50,257 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 17:01:50,258 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2136466508]
[2020-09-24 17:01:50,258 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 17:01:50,272 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
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