/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/Ackermann03.c


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


This is Ultimate 0.1.25-c90d42b
[2020-09-24 17:01:26,831 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2020-09-24 17:01:26,834 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2020-09-24 17:01:26,861 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2020-09-24 17:01:26,861 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2020-09-24 17:01:26,863 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2020-09-24 17:01:26,864 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2020-09-24 17:01:26,866 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2020-09-24 17:01:26,868 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2020-09-24 17:01:26,869 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
[2020-09-24 17:01:26,870 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
[2020-09-24 17:01:26,872 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2020-09-24 17:01:26,872 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2020-09-24 17:01:26,873 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2020-09-24 17:01:26,874 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2020-09-24 17:01:26,876 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2020-09-24 17:01:26,877 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2020-09-24 17:01:26,878 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2020-09-24 17:01:26,880 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2020-09-24 17:01:26,883 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2020-09-24 17:01:26,884 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2020-09-24 17:01:26,886 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2020-09-24 17:01:26,887 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2020-09-24 17:01:26,888 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2020-09-24 17:01:26,891 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2020-09-24 17:01:26,892 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2020-09-24 17:01:26,892 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2020-09-24 17:01:26,893 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2020-09-24 17:01:26,894 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2020-09-24 17:01:26,895 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2020-09-24 17:01:26,895 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2020-09-24 17:01:26,897 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2020-09-24 17:01:26,898 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2020-09-24 17:01:26,899 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2020-09-24 17:01:26,900 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2020-09-24 17:01:26,901 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
[2020-09-24 17:01:26,902 INFO  L184        SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2020-09-24 17:01:26,902 INFO  L184        SettingsManager]: ReqParser provides no preferences, ignoring...
[2020-09-24 17:01:26,902 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
[2020-09-24 17:01:26,903 INFO  L181        SettingsManager]: Resetting Witness Parser preferences to default values
[2020-09-24 17:01:26,904 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2020-09-24 17:01:26,905 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 17:01:26,932 INFO  L113        SettingsManager]: Loading preferences was successful
[2020-09-24 17:01:26,932 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2020-09-24 17:01:26,934 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2020-09-24 17:01:26,934 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2020-09-24 17:01:26,934 INFO  L138        SettingsManager]:  * Use SBE=true
[2020-09-24 17:01:26,934 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2020-09-24 17:01:26,935 INFO  L138        SettingsManager]:  * sizeof long=4
[2020-09-24 17:01:26,935 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2020-09-24 17:01:26,935 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2020-09-24 17:01:26,935 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2020-09-24 17:01:26,935 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2020-09-24 17:01:26,935 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2020-09-24 17:01:26,936 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2020-09-24 17:01:26,936 INFO  L138        SettingsManager]:  * sizeof long double=12
[2020-09-24 17:01:26,936 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2020-09-24 17:01:26,936 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2020-09-24 17:01:26,936 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2020-09-24 17:01:26,937 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2020-09-24 17:01:26,937 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2020-09-24 17:01:26,937 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2020-09-24 17:01:26,937 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2020-09-24 17:01:26,937 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-09-24 17:01:26,938 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2020-09-24 17:01:26,938 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2020-09-24 17:01:26,938 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2020-09-24 17:01:26,938 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2020-09-24 17:01:26,939 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-09-24 17:01:26,939 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2020-09-24 17:01:26,939 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2020-09-24 17:01:26,939 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 17:01:27,378 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2020-09-24 17:01:27,404 INFO  L258   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2020-09-24 17:01:27,408 INFO  L214   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2020-09-24 17:01:27,410 INFO  L271        PluginConnector]: Initializing CDTParser...
[2020-09-24 17:01:27,411 INFO  L275        PluginConnector]: CDTParser initialized
[2020-09-24 17:01:27,413 INFO  L429   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/Ackermann03.c
[2020-09-24 17:01:27,502 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e9ad51071/0fc927030fa34f75a229cfc4cfc9619b/FLAG71204bdc5
[2020-09-24 17:01:28,064 INFO  L306              CDTParser]: Found 1 translation units.
[2020-09-24 17:01:28,065 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive/Ackermann03.c
[2020-09-24 17:01:28,072 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e9ad51071/0fc927030fa34f75a229cfc4cfc9619b/FLAG71204bdc5
[2020-09-24 17:01:28,431 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e9ad51071/0fc927030fa34f75a229cfc4cfc9619b
[2020-09-24 17:01:28,450 INFO  L296   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2020-09-24 17:01:28,459 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2020-09-24 17:01:28,462 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2020-09-24 17:01:28,463 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2020-09-24 17:01:28,467 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2020-09-24 17:01:28,469 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 05:01:28" (1/1) ...
[2020-09-24 17:01:28,473 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@8e1d50f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:01:28, skipping insertion in model container
[2020-09-24 17:01:28,473 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 05:01:28" (1/1) ...
[2020-09-24 17:01:28,484 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2020-09-24 17:01:28,513 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2020-09-24 17:01:28,747 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-09-24 17:01:28,753 INFO  L203         MainTranslator]: Completed pre-run
[2020-09-24 17:01:28,772 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-09-24 17:01:28,789 INFO  L208         MainTranslator]: Completed translation
[2020-09-24 17:01:28,789 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:01:28 WrapperNode
[2020-09-24 17:01:28,789 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2020-09-24 17:01:28,790 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2020-09-24 17:01:28,790 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2020-09-24 17:01:28,791 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2020-09-24 17:01:28,806 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:01:28" (1/1) ...
[2020-09-24 17:01:28,807 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:01:28" (1/1) ...
[2020-09-24 17:01:28,901 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:01:28" (1/1) ...
[2020-09-24 17:01:28,902 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:01:28" (1/1) ...
[2020-09-24 17:01:28,913 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:01:28" (1/1) ...
[2020-09-24 17:01:28,916 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:01:28" (1/1) ...
[2020-09-24 17:01:28,918 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:01:28" (1/1) ...
[2020-09-24 17:01:28,920 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2020-09-24 17:01:28,920 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2020-09-24 17:01:28,920 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2020-09-24 17:01:28,921 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2020-09-24 17:01:28,922 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:01:28" (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 17:01:29,005 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2020-09-24 17:01:29,006 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2020-09-24 17:01:29,006 INFO  L138     BoogieDeclarations]: Found implementation of procedure ackermann
[2020-09-24 17:01:29,006 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2020-09-24 17:01:29,006 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2020-09-24 17:01:29,006 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int
[2020-09-24 17:01:29,007 INFO  L130     BoogieDeclarations]: Found specification of procedure ackermann
[2020-09-24 17:01:29,007 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2020-09-24 17:01:29,007 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2020-09-24 17:01:29,008 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2020-09-24 17:01:29,269 INFO  L290             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2020-09-24 17:01:29,269 INFO  L295             CfgBuilder]: Removed 0 assume(true) statements.
[2020-09-24 17:01:29,276 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 05:01:29 BoogieIcfgContainer
[2020-09-24 17:01:29,277 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2020-09-24 17:01:29,281 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2020-09-24 17:01:29,281 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2020-09-24 17:01:29,286 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2020-09-24 17:01:29,287 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 05:01:28" (1/3) ...
[2020-09-24 17:01:29,288 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23b547d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 05:01:29, skipping insertion in model container
[2020-09-24 17:01:29,288 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:01:28" (2/3) ...
[2020-09-24 17:01:29,289 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23b547d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 05:01:29, skipping insertion in model container
[2020-09-24 17:01:29,289 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 05:01:29" (3/3) ...
[2020-09-24 17:01:29,292 INFO  L109   eAbstractionObserver]: Analyzing ICFG Ackermann03.c
[2020-09-24 17:01:29,309 INFO  L157   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION
[2020-09-24 17:01:29,320 INFO  L169   ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2020-09-24 17:01:29,359 INFO  L251      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2020-09-24 17:01:29,392 INFO  L375      AbstractCegarLoop]: Interprodecural is true
[2020-09-24 17:01:29,392 INFO  L376      AbstractCegarLoop]: Hoare is true
[2020-09-24 17:01:29,393 INFO  L377      AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation
[2020-09-24 17:01:29,393 INFO  L378      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2020-09-24 17:01:29,393 INFO  L379      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2020-09-24 17:01:29,393 INFO  L380      AbstractCegarLoop]: Difference is false
[2020-09-24 17:01:29,394 INFO  L381      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2020-09-24 17:01:29,394 INFO  L385      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2020-09-24 17:01:29,416 INFO  L276                IsEmpty]: Start isEmpty. Operand 44 states.
[2020-09-24 17:01:29,424 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 25
[2020-09-24 17:01:29,425 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-24 17:01:29,426 INFO  L422         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-24 17:01:29,426 INFO  L427      AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 17:01:29,433 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 17:01:29,433 INFO  L82        PathProgramCache]: Analyzing trace with hash -852610024, now seen corresponding path program 1 times
[2020-09-24 17:01:29,442 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 17:01:29,443 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2104784484]
[2020-09-24 17:01:29,443 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 17:01:29,570 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 17:01:29,604 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:01:29,762 FATAL L256   erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set)
[2020-09-24 17:01:29,763 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 33
[2020-09-24 17:01:29,763 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 17:01:29,763 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 186
[2020-09-24 17:01:29,765 FATAL L256   erpolLogProxyWrapper]: Heuristic: RANDOM
[2020-09-24 17:01:29,765 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 4
[2020-09-24 17:01:29,765 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 20
[2020-09-24 17:01:29,765 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 12
[2020-09-24 17:01:29,766 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 2
[2020-09-24 17:01:29,854 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-24 17:01:29,856 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 17:01:29,858 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:01:29,865 FATAL L256   erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set)
[2020-09-24 17:01:29,866 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 8
[2020-09-24 17:01:29,866 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 17:01:29,866 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 8
[2020-09-24 17:01:29,867 FATAL L256   erpolLogProxyWrapper]: Heuristic: RANDOM
[2020-09-24 17:01:29,867 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-24 17:01:29,867 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 17:01:29,868 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-24 17:01:29,869 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-24 17:01:29,875 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12
[2020-09-24 17:01:29,891 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 17:01:29,904 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:01:29,973 FATAL L256   erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set)
[2020-09-24 17:01:29,973 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 12
[2020-09-24 17:01:29,974 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 17:01:29,976 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 80
[2020-09-24 17:01:29,976 FATAL L256   erpolLogProxyWrapper]: Heuristic: RANDOM
[2020-09-24 17:01:29,977 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 4
[2020-09-24 17:01:29,977 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 17:01:29,977 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 9
[2020-09-24 17:01:29,977 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-24 17:01:30,020 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 17:01:30,021 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2104784484]
[2020-09-24 17:01:30,024 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-09-24 17:01:30,024 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2020-09-24 17:01:30,025 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680834427]
[2020-09-24 17:01:30,032 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 5 states
[2020-09-24 17:01:30,032 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-24 17:01:30,050 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2020-09-24 17:01:30,052 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2020-09-24 17:01:30,055 INFO  L87              Difference]: Start difference. First operand 44 states. Second operand 5 states.
[2020-09-24 17:01:30,202 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-24 17:01:30,203 INFO  L93              Difference]: Finished difference Result 88 states and 110 transitions.
[2020-09-24 17:01:30,204 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2020-09-24 17:01:30,206 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 24
[2020-09-24 17:01:30,206 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-24 17:01:30,222 INFO  L225             Difference]: With dead ends: 88
[2020-09-24 17:01:30,222 INFO  L226             Difference]: Without dead ends: 45
[2020-09-24 17:01:30,228 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 17:01:30,252 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 45 states.
[2020-09-24 17:01:30,288 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45.
[2020-09-24 17:01:30,290 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 45 states.
[2020-09-24 17:01:30,292 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 52 transitions.
[2020-09-24 17:01:30,295 INFO  L78                 Accepts]: Start accepts. Automaton has 45 states and 52 transitions. Word has length 24
[2020-09-24 17:01:30,295 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-09-24 17:01:30,296 INFO  L479      AbstractCegarLoop]: Abstraction has 45 states and 52 transitions.
[2020-09-24 17:01:30,296 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2020-09-24 17:01:30,296 INFO  L276                IsEmpty]: Start isEmpty. Operand 45 states and 52 transitions.
[2020-09-24 17:01:30,300 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 35
[2020-09-24 17:01:30,300 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-24 17:01:30,300 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, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-24 17:01:30,301 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2020-09-24 17:01:30,301 INFO  L427      AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 17:01:30,302 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 17:01:30,302 INFO  L82        PathProgramCache]: Analyzing trace with hash 1574290279, now seen corresponding path program 1 times
[2020-09-24 17:01:30,302 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 17:01:30,303 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1336731893]
[2020-09-24 17:01:30,303 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 17:01:30,320 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 17:01:30,336 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:01:30,375 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:01:30,757 FATAL L256   erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set)
[2020-09-24 17:01:30,757 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 45
[2020-09-24 17:01:30,757 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 2
[2020-09-24 17:01:30,758 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 434
[2020-09-24 17:01:30,758 FATAL L256   erpolLogProxyWrapper]: Heuristic: RANDOM
[2020-09-24 17:01:30,758 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 4
[2020-09-24 17:01:30,759 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 20
[2020-09-24 17:01:30,759 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 24
[2020-09-24 17:01:30,759 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-24 17:01:30,783 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-24 17:01:30,783 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 17:01:30,785 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:01:30,788 FATAL L256   erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set)
[2020-09-24 17:01:30,789 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 8
[2020-09-24 17:01:30,789 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 17:01:30,789 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 4
[2020-09-24 17:01:30,789 FATAL L256   erpolLogProxyWrapper]: Heuristic: RANDOM
[2020-09-24 17:01:30,790 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-24 17:01:30,791 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 17:01:30,791 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-24 17:01:30,791 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-24 17:01:30,793 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12
[2020-09-24 17:01:30,808 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 17:01:30,818 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:01:30,902 FATAL L256   erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set)
[2020-09-24 17:01:30,902 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 24
[2020-09-24 17:01:30,903 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 17:01:30,903 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 90
[2020-09-24 17:01:30,903 FATAL L256   erpolLogProxyWrapper]: Heuristic: RANDOM
[2020-09-24 17:01:30,904 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 4
[2020-09-24 17:01:30,904 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 17:01:30,904 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 21
[2020-09-24 17:01:30,904 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-24 17:01:30,937 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4
[2020-09-24 17:01:30,942 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 17:01:30,945 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:01:30,961 FATAL L256   erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set)
[2020-09-24 17:01:30,962 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 12
[2020-09-24 17:01:30,962 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 17:01:30,962 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 18
[2020-09-24 17:01:30,963 FATAL L256   erpolLogProxyWrapper]: Heuristic: RANDOM
[2020-09-24 17:01:30,963 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 2
[2020-09-24 17:01:30,963 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 17:01:30,963 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 8
[2020-09-24 17:01:30,964 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-24 17:01:30,977 INFO  L134       CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked.
[2020-09-24 17:01:30,979 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1336731893]
[2020-09-24 17:01:30,980 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-09-24 17:01:30,980 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5
[2020-09-24 17:01:30,981 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574903893]
[2020-09-24 17:01:30,986 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 5 states
[2020-09-24 17:01:30,986 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-24 17:01:30,986 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2020-09-24 17:01:30,987 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2020-09-24 17:01:30,988 INFO  L87              Difference]: Start difference. First operand 45 states and 52 transitions. Second operand 5 states.
[2020-09-24 17:01:31,135 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-24 17:01:31,136 INFO  L93              Difference]: Finished difference Result 83 states and 108 transitions.
[2020-09-24 17:01:31,137 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2020-09-24 17:01:31,138 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 34
[2020-09-24 17:01:31,139 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-24 17:01:31,143 INFO  L225             Difference]: With dead ends: 83
[2020-09-24 17:01:31,143 INFO  L226             Difference]: Without dead ends: 47
[2020-09-24 17:01:31,146 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 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 17:01:31,150 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 47 states.
[2020-09-24 17:01:31,167 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47.
[2020-09-24 17:01:31,168 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 47 states.
[2020-09-24 17:01:31,172 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 56 transitions.
[2020-09-24 17:01:31,173 INFO  L78                 Accepts]: Start accepts. Automaton has 47 states and 56 transitions. Word has length 34
[2020-09-24 17:01:31,173 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-09-24 17:01:31,173 INFO  L479      AbstractCegarLoop]: Abstraction has 47 states and 56 transitions.
[2020-09-24 17:01:31,173 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2020-09-24 17:01:31,176 INFO  L276                IsEmpty]: Start isEmpty. Operand 47 states and 56 transitions.
[2020-09-24 17:01:31,180 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 54
[2020-09-24 17:01:31,180 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-24 17:01:31,182 INFO  L422         BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-24 17:01:31,182 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2020-09-24 17:01:31,182 INFO  L427      AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 17:01:31,183 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 17:01:31,183 INFO  L82        PathProgramCache]: Analyzing trace with hash 1685750542, now seen corresponding path program 1 times
[2020-09-24 17:01:31,183 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 17:01:31,184 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [345646973]
[2020-09-24 17:01:31,184 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 17:01:31,205 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 17:01:31,228 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:01:31,276 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:01:31,319 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:01:34,495 FATAL L256   erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set)
[2020-09-24 17:01:34,495 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 68
[2020-09-24 17:01:34,498 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 3
[2020-09-24 17:01:34,498 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 3284
[2020-09-24 17:01:34,498 FATAL L256   erpolLogProxyWrapper]: Heuristic: RANDOM
[2020-09-24 17:01:34,499 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 6
[2020-09-24 17:01:34,499 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 20
[2020-09-24 17:01:34,499 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 47
[2020-09-24 17:01:34,499 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-24 17:01:34,523 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-24 17:01:34,523 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 17:01:34,525 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:01:34,526 FATAL L256   erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set)
[2020-09-24 17:01:34,527 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 8
[2020-09-24 17:01:34,527 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 17:01:34,528 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 1
[2020-09-24 17:01:34,528 FATAL L256   erpolLogProxyWrapper]: Heuristic: RANDOM
[2020-09-24 17:01:34,528 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-24 17:01:34,528 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 17:01:34,528 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-24 17:01:34,529 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-24 17:01:34,530 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12
[2020-09-24 17:01:34,541 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 17:01:34,553 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:01:34,648 FATAL L256   erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set)
[2020-09-24 17:01:34,649 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 47
[2020-09-24 17:01:34,649 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 17:01:34,650 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 105
[2020-09-24 17:01:34,650 FATAL L256   erpolLogProxyWrapper]: Heuristic: RANDOM
[2020-09-24 17:01:34,650 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 6
[2020-09-24 17:01:34,651 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 17:01:34,651 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 44
[2020-09-24 17:01:34,652 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-24 17:01:34,686 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4
[2020-09-24 17:01:34,692 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 17:01:34,698 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:01:34,739 FATAL L256   erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set)
[2020-09-24 17:01:34,740 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 24
[2020-09-24 17:01:34,740 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 17:01:34,740 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 46
[2020-09-24 17:01:34,741 FATAL L256   erpolLogProxyWrapper]: Heuristic: RANDOM
[2020-09-24 17:01:34,742 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 5
[2020-09-24 17:01:34,743 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 17:01:34,743 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 21
[2020-09-24 17:01:34,744 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 2
[2020-09-24 17:01:34,778 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4
[2020-09-24 17:01:34,781 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 17:01:34,783 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:01:34,795 FATAL L256   erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set)
[2020-09-24 17:01:34,795 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 12
[2020-09-24 17:01:34,796 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 17:01:34,796 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 13
[2020-09-24 17:01:34,799 FATAL L256   erpolLogProxyWrapper]: Heuristic: RANDOM
[2020-09-24 17:01:34,802 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 2
[2020-09-24 17:01:34,803 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 17:01:34,803 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 8
[2020-09-24 17:01:34,809 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 12
[2020-09-24 17:01:34,812 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22
[2020-09-24 17:01:34,814 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 17:01:34,818 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:01:34,826 FATAL L256   erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set)
[2020-09-24 17:01:34,826 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 12
[2020-09-24 17:01:34,826 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 17:01:34,827 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 10
[2020-09-24 17:01:34,827 FATAL L256   erpolLogProxyWrapper]: Heuristic: RANDOM
[2020-09-24 17:01:34,827 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 2
[2020-09-24 17:01:34,830 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 17:01:34,831 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 8
[2020-09-24 17:01:34,831 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 3
[2020-09-24 17:01:34,841 INFO  L134       CoverageAnalysis]: Checked inductivity of 32 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked.
[2020-09-24 17:01:34,842 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [345646973]
[2020-09-24 17:01:34,842 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-09-24 17:01:34,842 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7
[2020-09-24 17:01:34,843 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829770421]
[2020-09-24 17:01:34,845 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 7 states
[2020-09-24 17:01:34,846 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-24 17:01:34,846 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2020-09-24 17:01:34,847 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42
[2020-09-24 17:01:34,847 INFO  L87              Difference]: Start difference. First operand 47 states and 56 transitions. Second operand 7 states.
[2020-09-24 17:01:35,026 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-24 17:01:35,026 INFO  L93              Difference]: Finished difference Result 75 states and 97 transitions.
[2020-09-24 17:01:35,027 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2020-09-24 17:01:35,027 INFO  L78                 Accepts]: Start accepts. Automaton has 7 states. Word has length 53
[2020-09-24 17:01:35,028 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-24 17:01:35,034 INFO  L225             Difference]: With dead ends: 75
[2020-09-24 17:01:35,035 INFO  L226             Difference]: Without dead ends: 69
[2020-09-24 17:01:35,036 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72
[2020-09-24 17:01:35,037 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 69 states.
[2020-09-24 17:01:35,062 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69.
[2020-09-24 17:01:35,073 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 69 states.
[2020-09-24 17:01:35,079 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 91 transitions.
[2020-09-24 17:01:35,079 INFO  L78                 Accepts]: Start accepts. Automaton has 69 states and 91 transitions. Word has length 53
[2020-09-24 17:01:35,080 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-09-24 17:01:35,080 INFO  L479      AbstractCegarLoop]: Abstraction has 69 states and 91 transitions.
[2020-09-24 17:01:35,080 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 7 states.
[2020-09-24 17:01:35,080 INFO  L276                IsEmpty]: Start isEmpty. Operand 69 states and 91 transitions.
[2020-09-24 17:01:35,093 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 73
[2020-09-24 17:01:35,094 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-24 17:01:35,094 INFO  L422         BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-24 17:01:35,094 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2020-09-24 17:01:35,094 INFO  L427      AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 17:01:35,095 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 17:01:35,095 INFO  L82        PathProgramCache]: Analyzing trace with hash 1817818703, now seen corresponding path program 2 times
[2020-09-24 17:01:35,095 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 17:01:35,096 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [231051461]
[2020-09-24 17:01:35,096 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 17:01:35,118 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 17:01:35,142 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:01:35,187 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:01:35,321 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:01:38,024 FATAL L256   erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set)
[2020-09-24 17:01:38,024 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 91
[2020-09-24 17:01:38,024 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 3
[2020-09-24 17:01:38,025 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 2902
[2020-09-24 17:01:38,025 FATAL L256   erpolLogProxyWrapper]: Heuristic: RANDOM
[2020-09-24 17:01:38,025 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 10
[2020-09-24 17:01:38,025 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 20
[2020-09-24 17:01:38,025 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 70
[2020-09-24 17:01:38,026 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-24 17:01:38,049 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-24 17:01:38,050 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 17:01:38,051 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:01:38,052 FATAL L256   erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set)
[2020-09-24 17:01:38,052 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 8
[2020-09-24 17:01:38,052 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 17:01:38,053 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 1
[2020-09-24 17:01:38,053 FATAL L256   erpolLogProxyWrapper]: Heuristic: RANDOM
[2020-09-24 17:01:38,053 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-24 17:01:38,053 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 17:01:38,054 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-24 17:01:38,054 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-24 17:01:38,055 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12
[2020-09-24 17:01:38,063 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 17:01:38,076 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:01:38,108 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:01:38,130 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:01:41,194 FATAL L256   erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set)
[2020-09-24 17:01:41,194 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 70
[2020-09-24 17:01:41,194 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 3
[2020-09-24 17:01:41,195 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 3128
[2020-09-24 17:01:41,195 FATAL L256   erpolLogProxyWrapper]: Heuristic: RANDOM
[2020-09-24 17:01:41,195 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 10
[2020-09-24 17:01:41,195 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 17:01:41,195 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 67
[2020-09-24 17:01:41,196 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-24 17:01:41,223 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4
[2020-09-24 17:01:41,231 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 17:01:41,239 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:01:41,264 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:01:41,775 FATAL L256   erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set)
[2020-09-24 17:01:41,775 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 47
[2020-09-24 17:01:41,775 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 2
[2020-09-24 17:01:41,775 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 541
[2020-09-24 17:01:41,776 FATAL L256   erpolLogProxyWrapper]: Heuristic: RANDOM
[2020-09-24 17:01:41,776 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 9
[2020-09-24 17:01:41,776 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 17:01:41,776 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 44
[2020-09-24 17:01:41,776 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-24 17:01:41,799 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4
[2020-09-24 17:01:41,804 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 17:01:41,808 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:01:41,857 FATAL L256   erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set)
[2020-09-24 17:01:41,857 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 24
[2020-09-24 17:01:41,857 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 17:01:41,858 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 51
[2020-09-24 17:01:41,858 FATAL L256   erpolLogProxyWrapper]: Heuristic: RANDOM
[2020-09-24 17:01:41,858 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 7
[2020-09-24 17:01:41,858 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 17:01:41,859 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 21
[2020-09-24 17:01:41,859 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-24 17:01:41,872 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4
[2020-09-24 17:01:41,875 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 17:01:41,877 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:01:41,894 FATAL L256   erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set)
[2020-09-24 17:01:41,895 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 12
[2020-09-24 17:01:41,895 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 17:01:41,895 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 18
[2020-09-24 17:01:41,896 FATAL L256   erpolLogProxyWrapper]: Heuristic: RANDOM
[2020-09-24 17:01:41,896 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 5
[2020-09-24 17:01:41,897 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 17:01:41,900 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 9
[2020-09-24 17:01:41,900 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 4
[2020-09-24 17:01:41,923 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22
[2020-09-24 17:01:41,925 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 17:01:41,928 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:01:41,941 FATAL L256   erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set)
[2020-09-24 17:01:41,941 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 12
[2020-09-24 17:01:41,942 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 17:01:41,942 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 15
[2020-09-24 17:01:41,942 FATAL L256   erpolLogProxyWrapper]: Heuristic: RANDOM
[2020-09-24 17:01:41,943 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 2
[2020-09-24 17:01:41,943 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 17:01:41,943 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 8
[2020-09-24 17:01:41,944 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-24 17:01:41,948 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41
[2020-09-24 17:01:41,950 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 17:01:41,952 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:01:41,958 FATAL L256   erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set)
[2020-09-24 17:01:41,958 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 12
[2020-09-24 17:01:41,958 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 17:01:41,959 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 7
[2020-09-24 17:01:41,959 FATAL L256   erpolLogProxyWrapper]: Heuristic: RANDOM
[2020-09-24 17:01:41,959 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 2
[2020-09-24 17:01:41,959 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 17:01:41,959 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 8
[2020-09-24 17:01:41,960 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-24 17:01:41,973 INFO  L134       CoverageAnalysis]: Checked inductivity of 88 backedges. 6 proven. 44 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked.
[2020-09-24 17:01:41,975 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [231051461]
[2020-09-24 17:01:41,975 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-09-24 17:01:41,975 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7
[2020-09-24 17:01:41,975 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241907157]
[2020-09-24 17:01:41,977 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 7 states
[2020-09-24 17:01:41,977 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-24 17:01:41,977 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2020-09-24 17:01:41,978 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42
[2020-09-24 17:01:41,979 INFO  L87              Difference]: Start difference. First operand 69 states and 91 transitions. Second operand 7 states.
[2020-09-24 17:01:42,147 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-24 17:01:42,147 INFO  L93              Difference]: Finished difference Result 107 states and 159 transitions.
[2020-09-24 17:01:42,148 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2020-09-24 17:01:42,148 INFO  L78                 Accepts]: Start accepts. Automaton has 7 states. Word has length 72
[2020-09-24 17:01:42,149 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-24 17:01:42,156 INFO  L225             Difference]: With dead ends: 107
[2020-09-24 17:01:42,157 INFO  L226             Difference]: Without dead ends: 101
[2020-09-24 17:01:42,159 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72
[2020-09-24 17:01:42,161 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 101 states.
[2020-09-24 17:01:42,192 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101.
[2020-09-24 17:01:42,193 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 101 states.
[2020-09-24 17:01:42,195 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 153 transitions.
[2020-09-24 17:01:42,195 INFO  L78                 Accepts]: Start accepts. Automaton has 101 states and 153 transitions. Word has length 72
[2020-09-24 17:01:42,197 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-09-24 17:01:42,198 INFO  L479      AbstractCegarLoop]: Abstraction has 101 states and 153 transitions.
[2020-09-24 17:01:42,198 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 7 states.
[2020-09-24 17:01:42,198 INFO  L276                IsEmpty]: Start isEmpty. Operand 101 states and 153 transitions.
[2020-09-24 17:01:42,209 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 180
[2020-09-24 17:01:42,209 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-24 17:01:42,209 INFO  L422         BasicCegarLoop]: trace histogram [17, 17, 17, 11, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-24 17:01:42,211 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3
[2020-09-24 17:01:42,211 INFO  L427      AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 17:01:42,212 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 17:01:42,212 INFO  L82        PathProgramCache]: Analyzing trace with hash -1454565455, now seen corresponding path program 3 times
[2020-09-24 17:01:42,212 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 17:01:42,212 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1502149246]
[2020-09-24 17:01:42,213 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 17:01:42,236 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 17:01:42,277 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:01:42,356 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:01:42,461 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:01:42,553 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:01:50,058 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:01:50,202 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:01:51,637 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:01:51,704 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:01:51,807 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:01:54,367 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:01:54,422 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:01:56,437 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:01:56,640 FATAL L256   erpolLogProxyWrapper]: Now shrinking...