/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/array-lopstr16/flag_loopdep.i


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


This is Ultimate 0.1.25-c90d42b
[2020-09-24 17:19:15,843 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2020-09-24 17:19:15,847 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2020-09-24 17:19:15,873 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2020-09-24 17:19:15,874 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2020-09-24 17:19:15,875 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2020-09-24 17:19:15,877 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2020-09-24 17:19:15,879 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2020-09-24 17:19:15,881 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2020-09-24 17:19:15,882 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
[2020-09-24 17:19:15,883 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
[2020-09-24 17:19:15,885 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2020-09-24 17:19:15,885 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2020-09-24 17:19:15,886 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2020-09-24 17:19:15,887 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2020-09-24 17:19:15,888 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2020-09-24 17:19:15,889 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2020-09-24 17:19:15,891 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2020-09-24 17:19:15,893 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2020-09-24 17:19:15,895 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2020-09-24 17:19:15,897 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2020-09-24 17:19:15,898 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2020-09-24 17:19:15,899 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2020-09-24 17:19:15,902 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2020-09-24 17:19:15,907 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2020-09-24 17:19:15,907 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2020-09-24 17:19:15,907 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2020-09-24 17:19:15,909 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2020-09-24 17:19:15,912 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2020-09-24 17:19:15,913 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2020-09-24 17:19:15,913 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2020-09-24 17:19:15,914 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2020-09-24 17:19:15,915 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2020-09-24 17:19:15,917 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2020-09-24 17:19:15,918 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2020-09-24 17:19:15,918 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
[2020-09-24 17:19:15,919 INFO  L184        SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2020-09-24 17:19:15,919 INFO  L184        SettingsManager]: ReqParser provides no preferences, ignoring...
[2020-09-24 17:19:15,920 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
[2020-09-24 17:19:15,922 INFO  L181        SettingsManager]: Resetting Witness Parser preferences to default values
[2020-09-24 17:19:15,924 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2020-09-24 17:19:15,925 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 17:19:15,982 INFO  L113        SettingsManager]: Loading preferences was successful
[2020-09-24 17:19:15,983 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2020-09-24 17:19:15,985 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2020-09-24 17:19:15,986 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2020-09-24 17:19:15,986 INFO  L138        SettingsManager]:  * Use SBE=true
[2020-09-24 17:19:15,986 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2020-09-24 17:19:15,987 INFO  L138        SettingsManager]:  * sizeof long=4
[2020-09-24 17:19:15,987 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2020-09-24 17:19:15,987 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2020-09-24 17:19:15,987 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2020-09-24 17:19:15,987 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2020-09-24 17:19:15,988 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2020-09-24 17:19:15,989 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2020-09-24 17:19:15,989 INFO  L138        SettingsManager]:  * sizeof long double=12
[2020-09-24 17:19:15,989 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2020-09-24 17:19:15,989 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2020-09-24 17:19:15,990 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2020-09-24 17:19:15,990 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2020-09-24 17:19:15,990 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2020-09-24 17:19:15,990 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2020-09-24 17:19:15,990 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2020-09-24 17:19:15,991 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-09-24 17:19:15,991 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2020-09-24 17:19:15,992 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2020-09-24 17:19:15,992 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2020-09-24 17:19:15,992 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2020-09-24 17:19:15,992 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-09-24 17:19:15,992 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2020-09-24 17:19:15,993 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2020-09-24 17:19:15,993 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 17:19:16,516 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2020-09-24 17:19:16,543 INFO  L258   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2020-09-24 17:19:16,548 INFO  L214   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2020-09-24 17:19:16,550 INFO  L271        PluginConnector]: Initializing CDTParser...
[2020-09-24 17:19:16,551 INFO  L275        PluginConnector]: CDTParser initialized
[2020-09-24 17:19:16,552 INFO  L429   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-lopstr16/flag_loopdep.i
[2020-09-24 17:19:16,646 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5cfc97f41/110c500f46384223828bc70cc5c79fa4/FLAG85a6e46c6
[2020-09-24 17:19:17,164 INFO  L306              CDTParser]: Found 1 translation units.
[2020-09-24 17:19:17,165 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-lopstr16/flag_loopdep.i
[2020-09-24 17:19:17,174 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5cfc97f41/110c500f46384223828bc70cc5c79fa4/FLAG85a6e46c6
[2020-09-24 17:19:17,494 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5cfc97f41/110c500f46384223828bc70cc5c79fa4
[2020-09-24 17:19:17,512 INFO  L296   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2020-09-24 17:19:17,520 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2020-09-24 17:19:17,522 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2020-09-24 17:19:17,523 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2020-09-24 17:19:17,527 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2020-09-24 17:19:17,528 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 05:19:17" (1/1) ...
[2020-09-24 17:19:17,534 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@dbf213c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:19:17, skipping insertion in model container
[2020-09-24 17:19:17,534 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 05:19:17" (1/1) ...
[2020-09-24 17:19:17,544 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2020-09-24 17:19:17,573 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2020-09-24 17:19:17,808 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-09-24 17:19:17,818 INFO  L203         MainTranslator]: Completed pre-run
[2020-09-24 17:19:17,852 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-09-24 17:19:17,870 INFO  L208         MainTranslator]: Completed translation
[2020-09-24 17:19:17,871 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:19:17 WrapperNode
[2020-09-24 17:19:17,871 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2020-09-24 17:19:17,872 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2020-09-24 17:19:17,872 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2020-09-24 17:19:17,873 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2020-09-24 17:19:17,956 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:19:17" (1/1) ...
[2020-09-24 17:19:17,956 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:19:17" (1/1) ...
[2020-09-24 17:19:17,966 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:19:17" (1/1) ...
[2020-09-24 17:19:17,967 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:19:17" (1/1) ...
[2020-09-24 17:19:17,997 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:19:17" (1/1) ...
[2020-09-24 17:19:18,007 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:19:17" (1/1) ...
[2020-09-24 17:19:18,008 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:19:17" (1/1) ...
[2020-09-24 17:19:18,011 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2020-09-24 17:19:18,012 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2020-09-24 17:19:18,012 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2020-09-24 17:19:18,012 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2020-09-24 17:19:18,014 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:19:17" (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 17:19:18,090 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2020-09-24 17:19:18,090 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2020-09-24 17:19:18,090 INFO  L138     BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert
[2020-09-24 17:19:18,091 INFO  L138     BoogieDeclarations]: Found implementation of procedure init
[2020-09-24 17:19:18,091 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2020-09-24 17:19:18,091 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2020-09-24 17:19:18,091 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_assert
[2020-09-24 17:19:18,092 INFO  L130     BoogieDeclarations]: Found specification of procedure malloc
[2020-09-24 17:19:18,092 INFO  L130     BoogieDeclarations]: Found specification of procedure nondet_pointer
[2020-09-24 17:19:18,092 INFO  L130     BoogieDeclarations]: Found specification of procedure init
[2020-09-24 17:19:18,092 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap
[2020-09-24 17:19:18,092 INFO  L130     BoogieDeclarations]: Found specification of procedure write~$Pointer$
[2020-09-24 17:19:18,093 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2020-09-24 17:19:18,093 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack
[2020-09-24 17:19:18,093 INFO  L130     BoogieDeclarations]: Found specification of procedure read~$Pointer$
[2020-09-24 17:19:18,093 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc
[2020-09-24 17:19:18,093 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2020-09-24 17:19:18,094 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2020-09-24 17:19:18,487 INFO  L290             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2020-09-24 17:19:18,487 INFO  L295             CfgBuilder]: Removed 3 assume(true) statements.
[2020-09-24 17:19:18,497 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 05:19:18 BoogieIcfgContainer
[2020-09-24 17:19:18,497 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2020-09-24 17:19:18,499 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2020-09-24 17:19:18,500 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2020-09-24 17:19:18,503 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2020-09-24 17:19:18,504 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 05:19:17" (1/3) ...
[2020-09-24 17:19:18,505 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c726e82 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 05:19:18, skipping insertion in model container
[2020-09-24 17:19:18,505 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:19:17" (2/3) ...
[2020-09-24 17:19:18,505 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c726e82 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 05:19:18, skipping insertion in model container
[2020-09-24 17:19:18,506 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 05:19:18" (3/3) ...
[2020-09-24 17:19:18,508 INFO  L109   eAbstractionObserver]: Analyzing ICFG flag_loopdep.i
[2020-09-24 17:19:18,523 INFO  L157   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION
[2020-09-24 17:19:18,534 INFO  L169   ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2020-09-24 17:19:18,557 INFO  L251      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2020-09-24 17:19:18,590 INFO  L375      AbstractCegarLoop]: Interprodecural is true
[2020-09-24 17:19:18,591 INFO  L376      AbstractCegarLoop]: Hoare is true
[2020-09-24 17:19:18,591 INFO  L377      AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation
[2020-09-24 17:19:18,591 INFO  L378      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2020-09-24 17:19:18,591 INFO  L379      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2020-09-24 17:19:18,591 INFO  L380      AbstractCegarLoop]: Difference is false
[2020-09-24 17:19:18,591 INFO  L381      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2020-09-24 17:19:18,591 INFO  L385      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2020-09-24 17:19:18,617 INFO  L276                IsEmpty]: Start isEmpty. Operand 56 states.
[2020-09-24 17:19:18,626 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 30
[2020-09-24 17:19:18,626 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-24 17:19:18,628 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, 1, 1, 1, 1, 1]
[2020-09-24 17:19:18,628 INFO  L427      AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 17:19:18,636 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 17:19:18,637 INFO  L82        PathProgramCache]: Analyzing trace with hash -2004589429, now seen corresponding path program 1 times
[2020-09-24 17:19:18,647 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 17:19:18,648 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [239901211]
[2020-09-24 17:19:18,648 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 17:19:18,789 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 17:19:18,826 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:19:18,897 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:19:19,156 FATAL L256   erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set)
[2020-09-24 17:19:19,156 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 40
[2020-09-24 17:19:19,157 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 2
[2020-09-24 17:19:19,157 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 356
[2020-09-24 17:19:19,158 FATAL L256   erpolLogProxyWrapper]: Heuristic: RANDOM
[2020-09-24 17:19:19,159 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 2
[2020-09-24 17:19:19,159 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 28
[2020-09-24 17:19:19,159 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 2
[2020-09-24 17:19:19,159 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 2
[2020-09-24 17:19:19,236 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-24 17:19:19,239 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 17:19:19,242 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:19:19,252 FATAL L256   erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set)
[2020-09-24 17:19:19,252 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 11
[2020-09-24 17:19:19,253 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 17:19:19,253 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 11
[2020-09-24 17:19:19,253 FATAL L256   erpolLogProxyWrapper]: Heuristic: RANDOM
[2020-09-24 17:19:19,253 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-24 17:19:19,254 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 17:19:19,254 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-24 17:19:19,254 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-24 17:19:19,280 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11
[2020-09-24 17:19:19,283 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 17:19:19,286 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:19:19,291 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:19:19,303 FATAL L256   erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set)
[2020-09-24 17:19:19,304 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 13
[2020-09-24 17:19:19,304 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 2
[2020-09-24 17:19:19,304 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 19
[2020-09-24 17:19:19,305 FATAL L256   erpolLogProxyWrapper]: Heuristic: RANDOM
[2020-09-24 17:19:19,305 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-24 17:19:19,305 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 7
[2020-09-24 17:19:19,306 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-24 17:19:19,306 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-24 17:19:19,317 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 17:19:19,318 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [239901211]
[2020-09-24 17:19:19,321 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-09-24 17:19:19,321 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2020-09-24 17:19:19,323 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732313997]
[2020-09-24 17:19:19,329 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 5 states
[2020-09-24 17:19:19,330 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-24 17:19:19,346 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2020-09-24 17:19:19,347 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2020-09-24 17:19:19,349 INFO  L87              Difference]: Start difference. First operand 56 states. Second operand 5 states.
[2020-09-24 17:19:19,683 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-24 17:19:19,683 INFO  L93              Difference]: Finished difference Result 109 states and 134 transitions.
[2020-09-24 17:19:19,684 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2020-09-24 17:19:19,686 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 29
[2020-09-24 17:19:19,686 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-24 17:19:19,702 INFO  L225             Difference]: With dead ends: 109
[2020-09-24 17:19:19,702 INFO  L226             Difference]: Without dead ends: 68
[2020-09-24 17:19:19,707 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 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 17:19:19,731 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 68 states.
[2020-09-24 17:19:19,798 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 50.
[2020-09-24 17:19:19,800 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 50 states.
[2020-09-24 17:19:19,804 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions.
[2020-09-24 17:19:19,807 INFO  L78                 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 29
[2020-09-24 17:19:19,809 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-09-24 17:19:19,809 INFO  L479      AbstractCegarLoop]: Abstraction has 50 states and 54 transitions.
[2020-09-24 17:19:19,809 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2020-09-24 17:19:19,809 INFO  L276                IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions.
[2020-09-24 17:19:19,812 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 37
[2020-09-24 17:19:19,812 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-24 17:19:19,812 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-24 17:19:19,813 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2020-09-24 17:19:19,813 INFO  L427      AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 17:19:19,814 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 17:19:19,814 INFO  L82        PathProgramCache]: Analyzing trace with hash 1596363536, now seen corresponding path program 1 times
[2020-09-24 17:19:19,815 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 17:19:19,816 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1579056029]
[2020-09-24 17:19:19,816 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 17:19:19,848 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 17:19:19,882 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:19:19,959 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:19:20,279 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:19:21,672 FATAL L256   erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set)
[2020-09-24 17:19:21,673 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 47
[2020-09-24 17:19:21,673 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 3
[2020-09-24 17:19:21,673 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 1821
[2020-09-24 17:19:21,674 FATAL L256   erpolLogProxyWrapper]: Heuristic: RANDOM
[2020-09-24 17:19:21,674 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 8
[2020-09-24 17:19:21,674 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 28
[2020-09-24 17:19:21,675 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 18
[2020-09-24 17:19:21,676 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 2
[2020-09-24 17:19:21,863 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-24 17:19:21,866 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 17:19:21,870 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:19:21,874 FATAL L256   erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set)
[2020-09-24 17:19:21,880 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 11
[2020-09-24 17:19:21,880 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 17:19:21,880 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 5
[2020-09-24 17:19:21,880 FATAL L256   erpolLogProxyWrapper]: Heuristic: RANDOM
[2020-09-24 17:19:21,882 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-24 17:19:21,882 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 17:19:21,882 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-24 17:19:21,882 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-24 17:19:21,910 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11
[2020-09-24 17:19:21,912 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 17:19:21,915 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:19:21,919 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:19:21,942 FATAL L256   erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set)
[2020-09-24 17:19:21,942 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 13
[2020-09-24 17:19:21,943 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 2
[2020-09-24 17:19:21,943 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 29
[2020-09-24 17:19:21,943 FATAL L256   erpolLogProxyWrapper]: Heuristic: RANDOM
[2020-09-24 17:19:21,943 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-24 17:19:21,944 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 17:19:21,944 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-24 17:19:21,944 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-24 17:19:21,954 INFO  L134       CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-09-24 17:19:21,956 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1579056029]
[2020-09-24 17:19:21,956 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-09-24 17:19:21,957 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11
[2020-09-24 17:19:21,957 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437336696]
[2020-09-24 17:19:21,960 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 11 states
[2020-09-24 17:19:21,960 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-24 17:19:21,961 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants.
[2020-09-24 17:19:21,962 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110
[2020-09-24 17:19:21,962 INFO  L87              Difference]: Start difference. First operand 50 states and 54 transitions. Second operand 11 states.
[2020-09-24 17:19:22,632 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-24 17:19:22,633 INFO  L93              Difference]: Finished difference Result 101 states and 114 transitions.
[2020-09-24 17:19:22,633 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. 
[2020-09-24 17:19:22,634 INFO  L78                 Accepts]: Start accepts. Automaton has 11 states. Word has length 36
[2020-09-24 17:19:22,634 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-24 17:19:22,636 INFO  L225             Difference]: With dead ends: 101
[2020-09-24 17:19:22,636 INFO  L226             Difference]: Without dead ends: 99
[2020-09-24 17:19:22,638 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380
[2020-09-24 17:19:22,639 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 99 states.
[2020-09-24 17:19:22,649 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 70.
[2020-09-24 17:19:22,650 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 70 states.
[2020-09-24 17:19:22,651 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 78 transitions.
[2020-09-24 17:19:22,652 INFO  L78                 Accepts]: Start accepts. Automaton has 70 states and 78 transitions. Word has length 36
[2020-09-24 17:19:22,652 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-09-24 17:19:22,652 INFO  L479      AbstractCegarLoop]: Abstraction has 70 states and 78 transitions.
[2020-09-24 17:19:22,652 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 11 states.
[2020-09-24 17:19:22,653 INFO  L276                IsEmpty]: Start isEmpty. Operand 70 states and 78 transitions.
[2020-09-24 17:19:22,654 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 38
[2020-09-24 17:19:22,654 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-24 17:19:22,655 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-24 17:19:22,655 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2020-09-24 17:19:22,655 INFO  L427      AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 17:19:22,655 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 17:19:22,656 INFO  L82        PathProgramCache]: Analyzing trace with hash -1082881863, now seen corresponding path program 1 times
[2020-09-24 17:19:22,656 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 17:19:22,656 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [300567354]
[2020-09-24 17:19:22,657 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 17:19:22,667 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 17:19:22,677 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:19:22,699 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:19:22,771 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:19:23,498 FATAL L256   erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set)
[2020-09-24 17:19:23,499 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 48
[2020-09-24 17:19:23,499 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 3
[2020-09-24 17:19:23,499 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 829
[2020-09-24 17:19:23,500 FATAL L256   erpolLogProxyWrapper]: Heuristic: RANDOM
[2020-09-24 17:19:23,500 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 4
[2020-09-24 17:19:23,501 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 28
[2020-09-24 17:19:23,501 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 10
[2020-09-24 17:19:23,501 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-24 17:19:23,547 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-24 17:19:23,549 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 17:19:23,552 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:19:23,557 FATAL L256   erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set)
[2020-09-24 17:19:23,558 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 11
[2020-09-24 17:19:23,558 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 17:19:23,559 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 7
[2020-09-24 17:19:23,559 FATAL L256   erpolLogProxyWrapper]: Heuristic: RANDOM
[2020-09-24 17:19:23,559 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-24 17:19:23,560 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 17:19:23,560 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-24 17:19:23,560 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-24 17:19:23,581 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11
[2020-09-24 17:19:23,582 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 17:19:23,585 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:19:23,591 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:19:23,614 FATAL L256   erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set)
[2020-09-24 17:19:23,615 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 13
[2020-09-24 17:19:23,615 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 2
[2020-09-24 17:19:23,616 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 31
[2020-09-24 17:19:23,616 FATAL L256   erpolLogProxyWrapper]: Heuristic: RANDOM
[2020-09-24 17:19:23,616 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-24 17:19:23,617 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 17:19:23,617 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-24 17:19:23,618 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-24 17:19:23,624 INFO  L134       CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-09-24 17:19:23,625 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [300567354]
[2020-09-24 17:19:23,626 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-09-24 17:19:23,626 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7
[2020-09-24 17:19:23,626 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298091159]
[2020-09-24 17:19:23,627 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 7 states
[2020-09-24 17:19:23,627 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-24 17:19:23,627 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2020-09-24 17:19:23,628 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42
[2020-09-24 17:19:23,628 INFO  L87              Difference]: Start difference. First operand 70 states and 78 transitions. Second operand 7 states.
[2020-09-24 17:19:23,905 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-24 17:19:23,906 INFO  L93              Difference]: Finished difference Result 130 states and 147 transitions.
[2020-09-24 17:19:23,906 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. 
[2020-09-24 17:19:23,906 INFO  L78                 Accepts]: Start accepts. Automaton has 7 states. Word has length 37
[2020-09-24 17:19:23,907 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-24 17:19:23,908 INFO  L225             Difference]: With dead ends: 130
[2020-09-24 17:19:23,908 INFO  L226             Difference]: Without dead ends: 106
[2020-09-24 17:19:23,909 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 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 17:19:23,910 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 106 states.
[2020-09-24 17:19:23,919 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 81.
[2020-09-24 17:19:23,919 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 81 states.
[2020-09-24 17:19:23,920 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 89 transitions.
[2020-09-24 17:19:23,921 INFO  L78                 Accepts]: Start accepts. Automaton has 81 states and 89 transitions. Word has length 37
[2020-09-24 17:19:23,921 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-09-24 17:19:23,921 INFO  L479      AbstractCegarLoop]: Abstraction has 81 states and 89 transitions.
[2020-09-24 17:19:23,921 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 7 states.
[2020-09-24 17:19:23,922 INFO  L276                IsEmpty]: Start isEmpty. Operand 81 states and 89 transitions.
[2020-09-24 17:19:23,923 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 45
[2020-09-24 17:19:23,923 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-24 17:19:23,923 INFO  L422         BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-24 17:19:23,924 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2020-09-24 17:19:23,924 INFO  L427      AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 17:19:23,924 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 17:19:23,925 INFO  L82        PathProgramCache]: Analyzing trace with hash -615620904, now seen corresponding path program 1 times
[2020-09-24 17:19:23,925 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 17:19:23,925 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1468740007]
[2020-09-24 17:19:23,925 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 17:19:23,936 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 17:19:23,946 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:19:23,970 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:19:23,989 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:19:25,219 FATAL L256   erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set)
[2020-09-24 17:19:25,220 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 55
[2020-09-24 17:19:25,220 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 3
[2020-09-24 17:19:25,220 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 1282
[2020-09-24 17:19:25,220 FATAL L256   erpolLogProxyWrapper]: Heuristic: RANDOM
[2020-09-24 17:19:25,221 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 6
[2020-09-24 17:19:25,221 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 28
[2020-09-24 17:19:25,221 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 17
[2020-09-24 17:19:25,221 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-24 17:19:25,294 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-24 17:19:25,296 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 17:19:25,302 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:19:25,309 FATAL L256   erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set)
[2020-09-24 17:19:25,310 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 11
[2020-09-24 17:19:25,310 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 17:19:25,310 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 12
[2020-09-24 17:19:25,310 FATAL L256   erpolLogProxyWrapper]: Heuristic: RANDOM
[2020-09-24 17:19:25,311 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-24 17:19:25,311 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 17:19:25,311 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-24 17:19:25,311 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-24 17:19:25,337 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11
[2020-09-24 17:19:25,339 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 17:19:25,341 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:19:25,345 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:19:25,365 FATAL L256   erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set)
[2020-09-24 17:19:25,365 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 13
[2020-09-24 17:19:25,366 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 2
[2020-09-24 17:19:25,366 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 25
[2020-09-24 17:19:25,366 FATAL L256   erpolLogProxyWrapper]: Heuristic: RANDOM
[2020-09-24 17:19:25,367 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-24 17:19:25,367 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 17:19:25,367 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-24 17:19:25,368 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-24 17:19:25,375 INFO  L134       CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-09-24 17:19:25,376 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1468740007]
[2020-09-24 17:19:25,376 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-09-24 17:19:25,377 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9
[2020-09-24 17:19:25,377 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032970830]
[2020-09-24 17:19:25,378 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 9 states
[2020-09-24 17:19:25,378 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-24 17:19:25,378 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants.
[2020-09-24 17:19:25,379 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72
[2020-09-24 17:19:25,379 INFO  L87              Difference]: Start difference. First operand 81 states and 89 transitions. Second operand 9 states.
[2020-09-24 17:19:25,646 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-24 17:19:25,646 INFO  L93              Difference]: Finished difference Result 148 states and 167 transitions.
[2020-09-24 17:19:25,646 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. 
[2020-09-24 17:19:25,647 INFO  L78                 Accepts]: Start accepts. Automaton has 9 states. Word has length 44
[2020-09-24 17:19:25,647 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-24 17:19:25,648 INFO  L225             Difference]: With dead ends: 148
[2020-09-24 17:19:25,648 INFO  L226             Difference]: Without dead ends: 124
[2020-09-24 17:19:25,649 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182
[2020-09-24 17:19:25,650 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 124 states.
[2020-09-24 17:19:25,659 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 99.
[2020-09-24 17:19:25,659 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 99 states.
[2020-09-24 17:19:25,661 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 109 transitions.
[2020-09-24 17:19:25,661 INFO  L78                 Accepts]: Start accepts. Automaton has 99 states and 109 transitions. Word has length 44
[2020-09-24 17:19:25,661 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-09-24 17:19:25,661 INFO  L479      AbstractCegarLoop]: Abstraction has 99 states and 109 transitions.
[2020-09-24 17:19:25,662 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 9 states.
[2020-09-24 17:19:25,662 INFO  L276                IsEmpty]: Start isEmpty. Operand 99 states and 109 transitions.
[2020-09-24 17:19:25,663 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 52
[2020-09-24 17:19:25,663 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-24 17:19:25,664 INFO  L422         BasicCegarLoop]: trace histogram [3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1]
[2020-09-24 17:19:25,664 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3
[2020-09-24 17:19:25,664 INFO  L427      AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 17:19:25,664 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 17:19:25,665 INFO  L82        PathProgramCache]: Analyzing trace with hash 958150617, now seen corresponding path program 2 times
[2020-09-24 17:19:25,665 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 17:19:25,665 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1734381618]
[2020-09-24 17:19:25,665 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 17:19:25,675 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 17:19:25,685 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:19:25,708 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:19:25,750 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:19:27,498 FATAL L256   erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set)
[2020-09-24 17:19:27,499 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 62
[2020-09-24 17:19:27,499 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 3
[2020-09-24 17:19:27,499 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 1822
[2020-09-24 17:19:27,500 FATAL L256   erpolLogProxyWrapper]: Heuristic: RANDOM
[2020-09-24 17:19:27,500 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 4
[2020-09-24 17:19:27,500 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 19
[2020-09-24 17:19:27,501 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 7
[2020-09-24 17:19:27,501 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-24 17:19:27,531 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-24 17:19:27,533 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 17:19:27,535 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:19:27,542 FATAL L256   erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set)
[2020-09-24 17:19:27,543 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 11
[2020-09-24 17:19:27,543 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 17:19:27,543 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 8
[2020-09-24 17:19:27,544 FATAL L256   erpolLogProxyWrapper]: Heuristic: RANDOM
[2020-09-24 17:19:27,544 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-24 17:19:27,545 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 17:19:27,545 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-24 17:19:27,545 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-24 17:19:27,563 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11
[2020-09-24 17:19:27,570 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 17:19:27,574 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:19:27,594 FATAL L256   erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set)
[2020-09-24 17:19:27,595 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 13
[2020-09-24 17:19:27,595 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 17:19:27,596 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 24
[2020-09-24 17:19:27,596 FATAL L256   erpolLogProxyWrapper]: Heuristic: RANDOM
[2020-09-24 17:19:27,596 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 4
[2020-09-24 17:19:27,597 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 4
[2020-09-24 17:19:27,601 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 8
[2020-09-24 17:19:27,601 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 5
[2020-09-24 17:19:27,676 INFO  L134       CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked.
[2020-09-24 17:19:27,677 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1734381618]
[2020-09-24 17:19:27,677 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-09-24 17:19:27,677 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2020-09-24 17:19:27,677 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198961901]
[2020-09-24 17:19:27,678 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 7 states
[2020-09-24 17:19:27,678 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-24 17:19:27,678 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2020-09-24 17:19:27,679 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42
[2020-09-24 17:19:27,679 INFO  L87              Difference]: Start difference. First operand 99 states and 109 transitions. Second operand 7 states.
[2020-09-24 17:19:27,904 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-24 17:19:27,904 INFO  L93              Difference]: Finished difference Result 181 states and 201 transitions.
[2020-09-24 17:19:27,905 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. 
[2020-09-24 17:19:27,905 INFO  L78                 Accepts]: Start accepts. Automaton has 7 states. Word has length 51
[2020-09-24 17:19:27,905 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-24 17:19:27,906 INFO  L225             Difference]: With dead ends: 181
[2020-09-24 17:19:27,907 INFO  L226             Difference]: Without dead ends: 104
[2020-09-24 17:19:27,908 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110
[2020-09-24 17:19:27,908 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 104 states.
[2020-09-24 17:19:27,916 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 100.
[2020-09-24 17:19:27,916 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 100 states.
[2020-09-24 17:19:27,917 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 110 transitions.
[2020-09-24 17:19:27,918 INFO  L78                 Accepts]: Start accepts. Automaton has 100 states and 110 transitions. Word has length 51
[2020-09-24 17:19:27,918 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-09-24 17:19:27,918 INFO  L479      AbstractCegarLoop]: Abstraction has 100 states and 110 transitions.
[2020-09-24 17:19:27,918 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 7 states.
[2020-09-24 17:19:27,919 INFO  L276                IsEmpty]: Start isEmpty. Operand 100 states and 110 transitions.
[2020-09-24 17:19:27,920 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 58
[2020-09-24 17:19:27,920 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-24 17:19:27,920 INFO  L422         BasicCegarLoop]: trace histogram [3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-24 17:19:27,921 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4
[2020-09-24 17:19:27,921 INFO  L427      AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 17:19:27,921 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 17:19:27,921 INFO  L82        PathProgramCache]: Analyzing trace with hash -194813739, now seen corresponding path program 1 times
[2020-09-24 17:19:27,922 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 17:19:27,922 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [38763943]
[2020-09-24 17:19:27,922 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 17:19:27,933 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 17:19:27,943 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:19:27,971 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:19:28,087 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:19:28,425 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:19:28,611 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:19:36,469 FATAL L256   erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set)
[2020-09-24 17:19:36,470 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 68
[2020-09-24 17:19:36,470 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 5
[2020-09-24 17:19:36,470 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 8535
[2020-09-24 17:19:36,470 FATAL L256   erpolLogProxyWrapper]: Heuristic: RANDOM
[2020-09-24 17:19:36,471 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 15
[2020-09-24 17:19:36,471 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 19
[2020-09-24 17:19:36,471 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 39
[2020-09-24 17:19:36,471 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-24 17:19:36,581 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-24 17:19:36,585 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 17:19:36,587 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:19:36,592 FATAL L256   erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set)
[2020-09-24 17:19:36,593 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 11
[2020-09-24 17:19:36,593 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 17:19:36,594 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 6
[2020-09-24 17:19:36,594 FATAL L256   erpolLogProxyWrapper]: Heuristic: RANDOM
[2020-09-24 17:19:36,594 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-24 17:19:36,595 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 17:19:36,595 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-24 17:19:36,596 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-24 17:19:36,629 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11
[2020-09-24 17:19:36,634 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 17:19:36,640 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:19:36,682 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:19:36,850 FATAL L256   erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set)
[2020-09-24 17:19:36,851 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 19
[2020-09-24 17:19:36,851 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 2
[2020-09-24 17:19:36,852 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 215
[2020-09-24 17:19:36,852 FATAL L256   erpolLogProxyWrapper]: Heuristic: RANDOM
[2020-09-24 17:19:36,852 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 6
[2020-09-24 17:19:36,853 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 4
[2020-09-24 17:19:36,853 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 14
[2020-09-24 17:19:36,854 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-24 17:19:36,975 INFO  L134       CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked.
[2020-09-24 17:19:36,976 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [38763943]
[2020-09-24 17:19:36,977 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-09-24 17:19:36,977 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15
[2020-09-24 17:19:36,978 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103698760]
[2020-09-24 17:19:36,979 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 15 states
[2020-09-24 17:19:36,979 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-24 17:19:36,979 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants.
[2020-09-24 17:19:36,980 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210
[2020-09-24 17:19:36,980 INFO  L87              Difference]: Start difference. First operand 100 states and 110 transitions. Second operand 15 states.
[2020-09-24 17:19:37,456 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-24 17:19:37,456 INFO  L93              Difference]: Finished difference Result 194 states and 216 transitions.
[2020-09-24 17:19:37,457 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. 
[2020-09-24 17:19:37,457 INFO  L78                 Accepts]: Start accepts. Automaton has 15 states. Word has length 57
[2020-09-24 17:19:37,458 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-24 17:19:37,459 INFO  L225             Difference]: With dead ends: 194
[2020-09-24 17:19:37,459 INFO  L226             Difference]: Without dead ends: 117
[2020-09-24 17:19:37,460 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=95, Invalid=505, Unknown=0, NotChecked=0, Total=600
[2020-09-24 17:19:37,461 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 117 states.
[2020-09-24 17:19:37,472 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 106.
[2020-09-24 17:19:37,472 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 106 states.
[2020-09-24 17:19:37,473 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 116 transitions.
[2020-09-24 17:19:37,473 INFO  L78                 Accepts]: Start accepts. Automaton has 106 states and 116 transitions. Word has length 57
[2020-09-24 17:19:37,474 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-09-24 17:19:37,474 INFO  L479      AbstractCegarLoop]: Abstraction has 106 states and 116 transitions.
[2020-09-24 17:19:37,474 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 15 states.
[2020-09-24 17:19:37,474 INFO  L276                IsEmpty]: Start isEmpty. Operand 106 states and 116 transitions.
[2020-09-24 17:19:37,475 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 64
[2020-09-24 17:19:37,476 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-24 17:19:37,476 INFO  L422         BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-24 17:19:37,476 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5
[2020-09-24 17:19:37,476 INFO  L427      AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 17:19:37,477 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 17:19:37,477 INFO  L82        PathProgramCache]: Analyzing trace with hash -363930415, now seen corresponding path program 2 times
[2020-09-24 17:19:37,477 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 17:19:37,477 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [122152635]
[2020-09-24 17:19:37,478 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 17:19:37,491 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 17:19:37,506 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:19:37,541 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:19:37,567 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:19:38,314 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:19:38,468 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:19:40,571 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:19:43,392 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:19:44,638 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:19:44,844 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:19:45,292 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:19:48,265 FATAL L256   erpolLogProxyWrapper]: Now shrinking...