/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 enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-invgen/nested9.i


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


This is Ultimate 0.1.25-c90d42b
[2020-09-25 03:28:00,254 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2020-09-25 03:28:00,258 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2020-09-25 03:28:00,305 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2020-09-25 03:28:00,305 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2020-09-25 03:28:00,317 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2020-09-25 03:28:00,319 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2020-09-25 03:28:00,323 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2020-09-25 03:28:00,324 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2020-09-25 03:28:00,328 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
[2020-09-25 03:28:00,329 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
[2020-09-25 03:28:00,330 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2020-09-25 03:28:00,330 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2020-09-25 03:28:00,335 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2020-09-25 03:28:00,337 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2020-09-25 03:28:00,339 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2020-09-25 03:28:00,340 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2020-09-25 03:28:00,343 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2020-09-25 03:28:00,344 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2020-09-25 03:28:00,352 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2020-09-25 03:28:00,355 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2020-09-25 03:28:00,356 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2020-09-25 03:28:00,357 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2020-09-25 03:28:00,358 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2020-09-25 03:28:00,361 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2020-09-25 03:28:00,362 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2020-09-25 03:28:00,362 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2020-09-25 03:28:00,365 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2020-09-25 03:28:00,366 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2020-09-25 03:28:00,367 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2020-09-25 03:28:00,367 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2020-09-25 03:28:00,368 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2020-09-25 03:28:00,368 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2020-09-25 03:28:00,369 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2020-09-25 03:28:00,370 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2020-09-25 03:28:00,371 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
[2020-09-25 03:28:00,371 INFO  L184        SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2020-09-25 03:28:00,372 INFO  L184        SettingsManager]: ReqParser provides no preferences, ignoring...
[2020-09-25 03:28:00,372 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
[2020-09-25 03:28:00,373 INFO  L181        SettingsManager]: Resetting Witness Parser preferences to default values
[2020-09-25 03:28:00,374 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2020-09-25 03:28:00,375 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
[2020-09-25 03:28:00,424 INFO  L113        SettingsManager]: Loading preferences was successful
[2020-09-25 03:28:00,424 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2020-09-25 03:28:00,426 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2020-09-25 03:28:00,426 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2020-09-25 03:28:00,426 INFO  L138        SettingsManager]:  * Use SBE=true
[2020-09-25 03:28:00,427 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2020-09-25 03:28:00,427 INFO  L138        SettingsManager]:  * sizeof long=4
[2020-09-25 03:28:00,427 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2020-09-25 03:28:00,427 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2020-09-25 03:28:00,428 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2020-09-25 03:28:00,429 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2020-09-25 03:28:00,429 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2020-09-25 03:28:00,429 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2020-09-25 03:28:00,430 INFO  L138        SettingsManager]:  * sizeof long double=12
[2020-09-25 03:28:00,430 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2020-09-25 03:28:00,430 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2020-09-25 03:28:00,430 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2020-09-25 03:28:00,430 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2020-09-25 03:28:00,431 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2020-09-25 03:28:00,431 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2020-09-25 03:28:00,431 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2020-09-25 03:28:00,431 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-09-25 03:28:00,431 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2020-09-25 03:28:00,432 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2020-09-25 03:28:00,432 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2020-09-25 03:28:00,432 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2020-09-25 03:28:00,432 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-09-25 03:28:00,432 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2020-09-25 03:28:00,433 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2020-09-25 03:28:00,433 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;enumeration-timeout=5000;interpolation-heuristic=WIDEST;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;enumeration-timeout=5000;interpolation-heuristic=WIDEST;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;enumeration-timeout=5000;interpolation-heuristic=WIDEST;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;enumeration-timeout=5000;interpolation-heuristic=WIDEST;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;enumeration-timeout=5000;interpolation-heuristic=WIDEST;log-additional-information=true;
[2020-09-25 03:28:00,898 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2020-09-25 03:28:00,922 INFO  L258   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2020-09-25 03:28:00,927 INFO  L214   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2020-09-25 03:28:00,928 INFO  L271        PluginConnector]: Initializing CDTParser...
[2020-09-25 03:28:00,929 INFO  L275        PluginConnector]: CDTParser initialized
[2020-09-25 03:28:00,930 INFO  L429   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/nested9.i
[2020-09-25 03:28:00,999 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0a635b3cd/41cd8ad33fc34e62b2e3ae164827ddc2/FLAG41ddf39ce
[2020-09-25 03:28:01,485 INFO  L306              CDTParser]: Found 1 translation units.
[2020-09-25 03:28:01,486 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-invgen/nested9.i
[2020-09-25 03:28:01,493 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0a635b3cd/41cd8ad33fc34e62b2e3ae164827ddc2/FLAG41ddf39ce
[2020-09-25 03:28:01,845 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0a635b3cd/41cd8ad33fc34e62b2e3ae164827ddc2
[2020-09-25 03:28:01,860 INFO  L296   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2020-09-25 03:28:01,866 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2020-09-25 03:28:01,867 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2020-09-25 03:28:01,868 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2020-09-25 03:28:01,872 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2020-09-25 03:28:01,873 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 03:28:01" (1/1) ...
[2020-09-25 03:28:01,877 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@363635 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:28:01, skipping insertion in model container
[2020-09-25 03:28:01,877 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 03:28:01" (1/1) ...
[2020-09-25 03:28:01,886 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2020-09-25 03:28:01,910 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2020-09-25 03:28:02,131 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-09-25 03:28:02,136 INFO  L203         MainTranslator]: Completed pre-run
[2020-09-25 03:28:02,160 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-09-25 03:28:02,178 INFO  L208         MainTranslator]: Completed translation
[2020-09-25 03:28:02,179 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:28:02 WrapperNode
[2020-09-25 03:28:02,179 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2020-09-25 03:28:02,180 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2020-09-25 03:28:02,180 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2020-09-25 03:28:02,180 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2020-09-25 03:28:02,197 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:28:02" (1/1) ...
[2020-09-25 03:28:02,197 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:28:02" (1/1) ...
[2020-09-25 03:28:02,284 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:28:02" (1/1) ...
[2020-09-25 03:28:02,285 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:28:02" (1/1) ...
[2020-09-25 03:28:02,290 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:28:02" (1/1) ...
[2020-09-25 03:28:02,297 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:28:02" (1/1) ...
[2020-09-25 03:28:02,298 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:28:02" (1/1) ...
[2020-09-25 03:28:02,300 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2020-09-25 03:28:02,300 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2020-09-25 03:28:02,300 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2020-09-25 03:28:02,301 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2020-09-25 03:28:02,302 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:28:02" (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
[2020-09-25 03:28:02,387 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2020-09-25 03:28:02,388 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2020-09-25 03:28:02,388 INFO  L138     BoogieDeclarations]: Found implementation of procedure assume_abort_if_not
[2020-09-25 03:28:02,388 INFO  L138     BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert
[2020-09-25 03:28:02,388 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2020-09-25 03:28:02,388 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2020-09-25 03:28:02,388 INFO  L130     BoogieDeclarations]: Found specification of procedure abort
[2020-09-25 03:28:02,389 INFO  L130     BoogieDeclarations]: Found specification of procedure assume_abort_if_not
[2020-09-25 03:28:02,389 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_assert
[2020-09-25 03:28:02,389 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int
[2020-09-25 03:28:02,389 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2020-09-25 03:28:02,389 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2020-09-25 03:28:02,390 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2020-09-25 03:28:02,672 INFO  L290             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2020-09-25 03:28:02,672 INFO  L295             CfgBuilder]: Removed 3 assume(true) statements.
[2020-09-25 03:28:02,680 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 03:28:02 BoogieIcfgContainer
[2020-09-25 03:28:02,680 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2020-09-25 03:28:02,682 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2020-09-25 03:28:02,682 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2020-09-25 03:28:02,686 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2020-09-25 03:28:02,686 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 03:28:01" (1/3) ...
[2020-09-25 03:28:02,687 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@392c488 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 03:28:02, skipping insertion in model container
[2020-09-25 03:28:02,688 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:28:02" (2/3) ...
[2020-09-25 03:28:02,688 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@392c488 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 03:28:02, skipping insertion in model container
[2020-09-25 03:28:02,688 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 03:28:02" (3/3) ...
[2020-09-25 03:28:02,690 INFO  L109   eAbstractionObserver]: Analyzing ICFG nested9.i
[2020-09-25 03:28:02,704 INFO  L157   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION
[2020-09-25 03:28:02,715 INFO  L169   ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2020-09-25 03:28:02,745 INFO  L251      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2020-09-25 03:28:02,780 INFO  L375      AbstractCegarLoop]: Interprodecural is true
[2020-09-25 03:28:02,781 INFO  L376      AbstractCegarLoop]: Hoare is true
[2020-09-25 03:28:02,781 INFO  L377      AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation
[2020-09-25 03:28:02,781 INFO  L378      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2020-09-25 03:28:02,781 INFO  L379      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2020-09-25 03:28:02,782 INFO  L380      AbstractCegarLoop]: Difference is false
[2020-09-25 03:28:02,782 INFO  L381      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2020-09-25 03:28:02,782 INFO  L385      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2020-09-25 03:28:02,808 INFO  L276                IsEmpty]: Start isEmpty. Operand 54 states.
[2020-09-25 03:28:02,817 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 35
[2020-09-25 03:28:02,817 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-25 03:28:02,819 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]
[2020-09-25 03:28:02,819 INFO  L427      AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-25 03:28:02,827 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-25 03:28:02,827 INFO  L82        PathProgramCache]: Analyzing trace with hash -980226087, now seen corresponding path program 1 times
[2020-09-25 03:28:02,840 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-25 03:28:02,841 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1128347483]
[2020-09-25 03:28:02,841 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-25 03:28:02,984 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-25 03:28:03,020 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:03,121 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:03,420 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:03,556 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:03,628 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:03,761 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:03,788 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:03,817 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:03,958 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-09-25 03:28:03,958 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 43
[2020-09-25 03:28:03,958 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 8
[2020-09-25 03:28:03,959 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 968
[2020-09-25 03:28:03,962 FATAL L256   erpolLogProxyWrapper]: Heuristic: WIDEST
[2020-09-25 03:28:03,962 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 7
[2020-09-25 03:28:03,963 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 31
[2020-09-25 03:28:03,963 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 11
[2020-09-25 03:28:03,963 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 4
[2020-09-25 03:28:04,121 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-25 03:28:04,122 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-25 03:28:04,124 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:04,125 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-09-25 03:28:04,126 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 9
[2020-09-25 03:28:04,126 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-25 03:28:04,126 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 2
[2020-09-25 03:28:04,126 FATAL L256   erpolLogProxyWrapper]: Heuristic: WIDEST
[2020-09-25 03:28:04,127 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-25 03:28:04,127 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-25 03:28:04,127 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-25 03:28:04,127 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-25 03:28:04,137 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-09-25 03:28:04,138 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1128347483]
[2020-09-25 03:28:04,140 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-09-25 03:28:04,141 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9
[2020-09-25 03:28:04,142 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218084888]
[2020-09-25 03:28:04,148 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 9 states
[2020-09-25 03:28:04,148 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-25 03:28:04,164 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants.
[2020-09-25 03:28:04,165 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72
[2020-09-25 03:28:04,168 INFO  L87              Difference]: Start difference. First operand 54 states. Second operand 9 states.
[2020-09-25 03:28:04,786 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-25 03:28:04,787 INFO  L93              Difference]: Finished difference Result 112 states and 143 transitions.
[2020-09-25 03:28:04,787 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. 
[2020-09-25 03:28:04,789 INFO  L78                 Accepts]: Start accepts. Automaton has 9 states. Word has length 34
[2020-09-25 03:28:04,789 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-25 03:28:04,802 INFO  L225             Difference]: With dead ends: 112
[2020-09-25 03:28:04,803 INFO  L226             Difference]: Without dead ends: 75
[2020-09-25 03:28:04,807 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210
[2020-09-25 03:28:04,828 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 75 states.
[2020-09-25 03:28:04,862 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 59.
[2020-09-25 03:28:04,864 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 59 states.
[2020-09-25 03:28:04,866 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 63 transitions.
[2020-09-25 03:28:04,868 INFO  L78                 Accepts]: Start accepts. Automaton has 59 states and 63 transitions. Word has length 34
[2020-09-25 03:28:04,868 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-09-25 03:28:04,869 INFO  L479      AbstractCegarLoop]: Abstraction has 59 states and 63 transitions.
[2020-09-25 03:28:04,869 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 9 states.
[2020-09-25 03:28:04,869 INFO  L276                IsEmpty]: Start isEmpty. Operand 59 states and 63 transitions.
[2020-09-25 03:28:04,870 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 41
[2020-09-25 03:28:04,871 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-25 03:28:04,871 INFO  L422         BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-25 03:28:04,871 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2020-09-25 03:28:04,872 INFO  L427      AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-25 03:28:04,872 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-25 03:28:04,872 INFO  L82        PathProgramCache]: Analyzing trace with hash 1377800797, now seen corresponding path program 1 times
[2020-09-25 03:28:04,872 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-25 03:28:04,873 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [51761023]
[2020-09-25 03:28:04,873 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-25 03:28:04,887 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-25 03:28:04,897 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:04,929 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:05,024 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:05,165 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:05,579 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:05,611 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:05,756 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:05,836 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:05,881 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:06,469 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:06,713 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:06,851 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-09-25 03:28:06,852 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 49
[2020-09-25 03:28:06,855 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 11
[2020-09-25 03:28:06,856 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 1963
[2020-09-25 03:28:06,856 FATAL L256   erpolLogProxyWrapper]: Heuristic: WIDEST
[2020-09-25 03:28:06,856 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 9
[2020-09-25 03:28:06,857 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 31
[2020-09-25 03:28:06,857 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 17
[2020-09-25 03:28:06,857 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-25 03:28:06,973 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-25 03:28:06,974 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-25 03:28:06,975 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:06,976 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-09-25 03:28:06,976 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 9
[2020-09-25 03:28:06,977 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-25 03:28:06,977 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 1
[2020-09-25 03:28:06,977 FATAL L256   erpolLogProxyWrapper]: Heuristic: WIDEST
[2020-09-25 03:28:06,977 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-25 03:28:06,978 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-25 03:28:06,978 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-25 03:28:06,978 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-25 03:28:06,983 INFO  L134       CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-09-25 03:28:06,983 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [51761023]
[2020-09-25 03:28:06,983 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-09-25 03:28:06,984 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11
[2020-09-25 03:28:06,984 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303585571]
[2020-09-25 03:28:06,986 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 11 states
[2020-09-25 03:28:06,986 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-25 03:28:06,987 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants.
[2020-09-25 03:28:06,987 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110
[2020-09-25 03:28:06,987 INFO  L87              Difference]: Start difference. First operand 59 states and 63 transitions. Second operand 11 states.
[2020-09-25 03:28:07,613 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-25 03:28:07,613 INFO  L93              Difference]: Finished difference Result 119 states and 135 transitions.
[2020-09-25 03:28:07,614 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. 
[2020-09-25 03:28:07,615 INFO  L78                 Accepts]: Start accepts. Automaton has 11 states. Word has length 40
[2020-09-25 03:28:07,615 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-25 03:28:07,617 INFO  L225             Difference]: With dead ends: 119
[2020-09-25 03:28:07,618 INFO  L226             Difference]: Without dead ends: 117
[2020-09-25 03:28:07,621 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=142, Invalid=458, Unknown=0, NotChecked=0, Total=600
[2020-09-25 03:28:07,622 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 117 states.
[2020-09-25 03:28:07,651 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 87.
[2020-09-25 03:28:07,652 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 87 states.
[2020-09-25 03:28:07,655 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 98 transitions.
[2020-09-25 03:28:07,655 INFO  L78                 Accepts]: Start accepts. Automaton has 87 states and 98 transitions. Word has length 40
[2020-09-25 03:28:07,656 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-09-25 03:28:07,658 INFO  L479      AbstractCegarLoop]: Abstraction has 87 states and 98 transitions.
[2020-09-25 03:28:07,658 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 11 states.
[2020-09-25 03:28:07,659 INFO  L276                IsEmpty]: Start isEmpty. Operand 87 states and 98 transitions.
[2020-09-25 03:28:07,661 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 47
[2020-09-25 03:28:07,662 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-25 03:28:07,665 INFO  L422         BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-25 03:28:07,665 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2020-09-25 03:28:07,666 INFO  L427      AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-25 03:28:07,666 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-25 03:28:07,666 INFO  L82        PathProgramCache]: Analyzing trace with hash 1038172641, now seen corresponding path program 2 times
[2020-09-25 03:28:07,666 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-25 03:28:07,667 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1187871224]
[2020-09-25 03:28:07,667 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-25 03:28:07,683 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-25 03:28:07,694 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:07,729 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:07,756 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:07,827 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:08,287 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:08,352 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:08,424 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:09,351 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:09,464 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:09,575 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:09,658 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:09,702 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:09,734 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:10,108 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:10,142 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:10,278 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:10,925 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:11,100 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:11,438 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:11,904 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:12,685 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-09-25 03:28:12,685 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 55
[2020-09-25 03:28:12,686 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 20
[2020-09-25 03:28:12,686 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 5000
[2020-09-25 03:28:12,687 FATAL L256   erpolLogProxyWrapper]: Heuristic: WIDEST
[2020-09-25 03:28:12,687 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 11
[2020-09-25 03:28:12,687 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 31
[2020-09-25 03:28:12,688 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 23
[2020-09-25 03:28:12,688 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-25 03:28:12,811 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-25 03:28:12,812 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-25 03:28:12,814 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:12,815 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-09-25 03:28:12,815 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 9
[2020-09-25 03:28:12,815 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-25 03:28:12,815 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 1
[2020-09-25 03:28:12,816 FATAL L256   erpolLogProxyWrapper]: Heuristic: WIDEST
[2020-09-25 03:28:12,816 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-25 03:28:12,817 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-25 03:28:12,817 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-25 03:28:12,817 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-25 03:28:12,824 INFO  L134       CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-09-25 03:28:12,825 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1187871224]
[2020-09-25 03:28:12,825 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-09-25 03:28:12,825 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13
[2020-09-25 03:28:12,826 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086132577]
[2020-09-25 03:28:12,827 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 13 states
[2020-09-25 03:28:12,827 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-25 03:28:12,828 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants.
[2020-09-25 03:28:12,828 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156
[2020-09-25 03:28:12,828 INFO  L87              Difference]: Start difference. First operand 87 states and 98 transitions. Second operand 13 states.
[2020-09-25 03:28:13,772 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-25 03:28:13,773 INFO  L93              Difference]: Finished difference Result 149 states and 170 transitions.
[2020-09-25 03:28:13,773 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. 
[2020-09-25 03:28:13,774 INFO  L78                 Accepts]: Start accepts. Automaton has 13 states. Word has length 46
[2020-09-25 03:28:13,774 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-25 03:28:13,776 INFO  L225             Difference]: With dead ends: 149
[2020-09-25 03:28:13,777 INFO  L226             Difference]: Without dead ends: 147
[2020-09-25 03:28:13,778 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=242, Invalid=880, Unknown=0, NotChecked=0, Total=1122
[2020-09-25 03:28:13,779 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 147 states.
[2020-09-25 03:28:13,804 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 113.
[2020-09-25 03:28:13,804 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 113 states.
[2020-09-25 03:28:13,806 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 129 transitions.
[2020-09-25 03:28:13,806 INFO  L78                 Accepts]: Start accepts. Automaton has 113 states and 129 transitions. Word has length 46
[2020-09-25 03:28:13,806 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-09-25 03:28:13,806 INFO  L479      AbstractCegarLoop]: Abstraction has 113 states and 129 transitions.
[2020-09-25 03:28:13,806 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 13 states.
[2020-09-25 03:28:13,807 INFO  L276                IsEmpty]: Start isEmpty. Operand 113 states and 129 transitions.
[2020-09-25 03:28:13,808 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 47
[2020-09-25 03:28:13,808 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-25 03:28:13,809 INFO  L422         BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-25 03:28:13,809 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2020-09-25 03:28:13,809 INFO  L427      AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-25 03:28:13,809 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-25 03:28:13,810 INFO  L82        PathProgramCache]: Analyzing trace with hash -475110064, now seen corresponding path program 1 times
[2020-09-25 03:28:13,810 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-25 03:28:13,810 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [842329477]
[2020-09-25 03:28:13,810 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-25 03:28:13,820 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-25 03:28:13,828 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:13,843 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:13,876 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:14,048 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:14,128 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:14,200 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:14,604 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:14,638 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:14,780 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:14,802 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:14,932 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:14,978 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:15,003 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:15,121 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:15,155 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:15,666 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:15,804 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:16,620 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:17,036 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:17,114 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:17,289 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:18,155 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:18,367 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:18,602 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:18,821 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-09-25 03:28:18,821 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 55
[2020-09-25 03:28:18,822 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 24
[2020-09-25 03:28:18,822 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 5000
[2020-09-25 03:28:18,823 FATAL L256   erpolLogProxyWrapper]: Heuristic: WIDEST
[2020-09-25 03:28:18,823 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 11
[2020-09-25 03:28:18,823 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 31
[2020-09-25 03:28:18,824 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 23
[2020-09-25 03:28:18,824 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-25 03:28:18,966 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-25 03:28:18,967 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-25 03:28:18,968 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:18,969 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-09-25 03:28:18,970 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 9
[2020-09-25 03:28:18,970 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-25 03:28:18,970 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 2
[2020-09-25 03:28:18,971 FATAL L256   erpolLogProxyWrapper]: Heuristic: WIDEST
[2020-09-25 03:28:18,971 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-25 03:28:18,971 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-25 03:28:18,971 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-25 03:28:18,972 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-25 03:28:18,977 INFO  L134       CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-09-25 03:28:18,979 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [842329477]
[2020-09-25 03:28:18,980 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-09-25 03:28:18,980 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13
[2020-09-25 03:28:18,980 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632233449]
[2020-09-25 03:28:18,981 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 13 states
[2020-09-25 03:28:18,981 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-25 03:28:18,982 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants.
[2020-09-25 03:28:18,983 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156
[2020-09-25 03:28:18,984 INFO  L87              Difference]: Start difference. First operand 113 states and 129 transitions. Second operand 13 states.
[2020-09-25 03:28:19,848 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-25 03:28:19,848 INFO  L93              Difference]: Finished difference Result 189 states and 223 transitions.
[2020-09-25 03:28:19,849 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. 
[2020-09-25 03:28:19,849 INFO  L78                 Accepts]: Start accepts. Automaton has 13 states. Word has length 46
[2020-09-25 03:28:19,850 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-25 03:28:19,858 INFO  L225             Difference]: With dead ends: 189
[2020-09-25 03:28:19,861 INFO  L226             Difference]: Without dead ends: 187
[2020-09-25 03:28:19,863 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=257, Invalid=799, Unknown=0, NotChecked=0, Total=1056
[2020-09-25 03:28:19,865 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 187 states.
[2020-09-25 03:28:19,916 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 154.
[2020-09-25 03:28:19,916 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 154 states.
[2020-09-25 03:28:19,918 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 183 transitions.
[2020-09-25 03:28:19,918 INFO  L78                 Accepts]: Start accepts. Automaton has 154 states and 183 transitions. Word has length 46
[2020-09-25 03:28:19,918 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-09-25 03:28:19,918 INFO  L479      AbstractCegarLoop]: Abstraction has 154 states and 183 transitions.
[2020-09-25 03:28:19,918 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 13 states.
[2020-09-25 03:28:19,919 INFO  L276                IsEmpty]: Start isEmpty. Operand 154 states and 183 transitions.
[2020-09-25 03:28:19,920 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 50
[2020-09-25 03:28:19,920 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-25 03:28:19,921 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, 1, 1, 1, 1, 1]
[2020-09-25 03:28:19,921 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3
[2020-09-25 03:28:19,921 INFO  L427      AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-25 03:28:19,921 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-25 03:28:19,921 INFO  L82        PathProgramCache]: Analyzing trace with hash 918934774, now seen corresponding path program 1 times
[2020-09-25 03:28:19,922 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-25 03:28:19,922 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [18803011]
[2020-09-25 03:28:19,922 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-25 03:28:19,931 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-25 03:28:19,940 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:19,952 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:19,970 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:19,991 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:20,024 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:20,079 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:20,553 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:20,573 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:20,633 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:20,696 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:20,721 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:20,900 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:21,080 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:21,388 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:21,454 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:21,576 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:21,597 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:21,682 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:21,786 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:22,378 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:22,430 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:22,778 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:22,832 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:23,246 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:24,896 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:24,917 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:24,932 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:24,953 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-09-25 03:28:24,953 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 60
[2020-09-25 03:28:24,953 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 27
[2020-09-25 03:28:24,953 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 5020
[2020-09-25 03:28:24,954 FATAL L256   erpolLogProxyWrapper]: Heuristic: WIDEST
[2020-09-25 03:28:24,954 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 8
[2020-09-25 03:28:24,954 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 31
[2020-09-25 03:28:24,954 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 28
[2020-09-25 03:28:24,954 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-25 03:28:25,053 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-25 03:28:25,054 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-25 03:28:25,056 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:25,057 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-09-25 03:28:25,058 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 9
[2020-09-25 03:28:25,058 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-25 03:28:25,058 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 2
[2020-09-25 03:28:25,065 FATAL L256   erpolLogProxyWrapper]: Heuristic: WIDEST
[2020-09-25 03:28:25,065 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-25 03:28:25,065 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-25 03:28:25,065 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-25 03:28:25,066 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 6
[2020-09-25 03:28:25,071 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36
[2020-09-25 03:28:25,073 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-25 03:28:25,076 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:25,084 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-09-25 03:28:25,085 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 10
[2020-09-25 03:28:25,085 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-25 03:28:25,086 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 9
[2020-09-25 03:28:25,086 FATAL L256   erpolLogProxyWrapper]: Heuristic: WIDEST
[2020-09-25 03:28:25,086 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 2
[2020-09-25 03:28:25,087 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-25 03:28:25,087 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 6
[2020-09-25 03:28:25,087 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-25 03:28:25,098 INFO  L134       CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked.
[2020-09-25 03:28:25,099 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [18803011]
[2020-09-25 03:28:25,099 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-09-25 03:28:25,100 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10
[2020-09-25 03:28:25,100 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750673507]
[2020-09-25 03:28:25,100 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 10 states
[2020-09-25 03:28:25,101 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-25 03:28:25,101 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants.
[2020-09-25 03:28:25,101 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90
[2020-09-25 03:28:25,101 INFO  L87              Difference]: Start difference. First operand 154 states and 183 transitions. Second operand 10 states.
[2020-09-25 03:28:25,676 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-25 03:28:25,677 INFO  L93              Difference]: Finished difference Result 301 states and 361 transitions.
[2020-09-25 03:28:25,678 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. 
[2020-09-25 03:28:25,678 INFO  L78                 Accepts]: Start accepts. Automaton has 10 states. Word has length 49
[2020-09-25 03:28:25,679 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-25 03:28:25,681 INFO  L225             Difference]: With dead ends: 301
[2020-09-25 03:28:25,682 INFO  L226             Difference]: Without dead ends: 299
[2020-09-25 03:28:25,684 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=135, Invalid=417, Unknown=0, NotChecked=0, Total=552
[2020-09-25 03:28:25,684 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 299 states.
[2020-09-25 03:28:25,724 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 196.
[2020-09-25 03:28:25,724 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 196 states.
[2020-09-25 03:28:25,726 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 239 transitions.
[2020-09-25 03:28:25,726 INFO  L78                 Accepts]: Start accepts. Automaton has 196 states and 239 transitions. Word has length 49
[2020-09-25 03:28:25,727 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-09-25 03:28:25,727 INFO  L479      AbstractCegarLoop]: Abstraction has 196 states and 239 transitions.
[2020-09-25 03:28:25,727 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 10 states.
[2020-09-25 03:28:25,727 INFO  L276                IsEmpty]: Start isEmpty. Operand 196 states and 239 transitions.
[2020-09-25 03:28:25,737 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 59
[2020-09-25 03:28:25,737 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-25 03:28:25,737 INFO  L422         BasicCegarLoop]: trace histogram [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, 1]
[2020-09-25 03:28:25,738 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4
[2020-09-25 03:28:25,738 INFO  L427      AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-25 03:28:25,738 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-25 03:28:25,738 INFO  L82        PathProgramCache]: Analyzing trace with hash -1798560500, now seen corresponding path program 2 times
[2020-09-25 03:28:25,739 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-25 03:28:25,741 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1880745982]
[2020-09-25 03:28:25,741 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-25 03:28:25,755 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-25 03:28:25,767 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:25,781 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:25,796 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:25,822 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:25,893 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:26,031 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:26,071 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:26,086 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:26,851 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:26,959 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:27,017 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:27,083 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:27,727 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:27,759 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:27,819 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:28,099 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:28,122 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:28,268 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:28,433 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:28,600 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:28,707 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:28,833 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:28,910 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:28,947 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:29,492 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:29,513 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:29,675 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:29,705 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:29,727 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:29,745 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:30,203 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:30,226 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:30,292 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:30,435 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:30,759 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-09-25 03:28:30,759 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 71
[2020-09-25 03:28:30,759 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 34
[2020-09-25 03:28:30,760 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 5001
[2020-09-25 03:28:30,760 FATAL L256   erpolLogProxyWrapper]: Heuristic: WIDEST
[2020-09-25 03:28:30,760 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 12
[2020-09-25 03:28:30,760 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 31
[2020-09-25 03:28:30,760 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 39
[2020-09-25 03:28:30,760 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-25 03:28:30,884 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-25 03:28:30,885 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-25 03:28:30,886 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:30,891 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-09-25 03:28:30,891 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 9
[2020-09-25 03:28:30,891 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-25 03:28:30,891 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 4
[2020-09-25 03:28:30,891 FATAL L256   erpolLogProxyWrapper]: Heuristic: WIDEST
[2020-09-25 03:28:30,892 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-25 03:28:30,892 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-25 03:28:30,892 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-25 03:28:30,892 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-25 03:28:30,893 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36
[2020-09-25 03:28:30,902 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-25 03:28:30,907 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:30,924 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-09-25 03:28:30,924 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 10
[2020-09-25 03:28:30,924 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-25 03:28:30,924 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 21
[2020-09-25 03:28:30,925 FATAL L256   erpolLogProxyWrapper]: Heuristic: WIDEST
[2020-09-25 03:28:30,925 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 5
[2020-09-25 03:28:30,925 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-25 03:28:30,925 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 7
[2020-09-25 03:28:30,926 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-25 03:28:30,956 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45
[2020-09-25 03:28:30,958 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-25 03:28:30,960 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:30,967 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-09-25 03:28:30,967 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 10
[2020-09-25 03:28:30,967 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-25 03:28:30,968 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 8
[2020-09-25 03:28:30,968 FATAL L256   erpolLogProxyWrapper]: Heuristic: WIDEST
[2020-09-25 03:28:30,968 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 2
[2020-09-25 03:28:30,968 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-25 03:28:30,968 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 6
[2020-09-25 03:28:30,969 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-25 03:28:30,982 INFO  L134       CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked.
[2020-09-25 03:28:30,983 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1880745982]
[2020-09-25 03:28:30,984 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-09-25 03:28:30,984 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13
[2020-09-25 03:28:30,984 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484342805]
[2020-09-25 03:28:30,986 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 13 states
[2020-09-25 03:28:30,986 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-25 03:28:30,986 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants.
[2020-09-25 03:28:30,986 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156
[2020-09-25 03:28:30,986 INFO  L87              Difference]: Start difference. First operand 196 states and 239 transitions. Second operand 13 states.
[2020-09-25 03:28:31,389 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-25 03:28:31,390 INFO  L93              Difference]: Finished difference Result 340 states and 421 transitions.
[2020-09-25 03:28:31,396 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. 
[2020-09-25 03:28:31,396 INFO  L78                 Accepts]: Start accepts. Automaton has 13 states. Word has length 58
[2020-09-25 03:28:31,396 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-25 03:28:31,398 INFO  L225             Difference]: With dead ends: 340
[2020-09-25 03:28:31,398 INFO  L226             Difference]: Without dead ends: 173
[2020-09-25 03:28:31,402 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306
[2020-09-25 03:28:31,402 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 173 states.
[2020-09-25 03:28:31,433 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 170.
[2020-09-25 03:28:31,433 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 170 states.
[2020-09-25 03:28:31,435 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 206 transitions.
[2020-09-25 03:28:31,435 INFO  L78                 Accepts]: Start accepts. Automaton has 170 states and 206 transitions. Word has length 58
[2020-09-25 03:28:31,435 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-09-25 03:28:31,436 INFO  L479      AbstractCegarLoop]: Abstraction has 170 states and 206 transitions.
[2020-09-25 03:28:31,436 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 13 states.
[2020-09-25 03:28:31,436 INFO  L276                IsEmpty]: Start isEmpty. Operand 170 states and 206 transitions.
[2020-09-25 03:28:31,441 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 80
[2020-09-25 03:28:31,441 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-25 03:28:31,442 INFO  L422         BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 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]
[2020-09-25 03:28:31,442 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5
[2020-09-25 03:28:31,442 INFO  L427      AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-25 03:28:31,442 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-25 03:28:31,443 INFO  L82        PathProgramCache]: Analyzing trace with hash -903211995, now seen corresponding path program 1 times
[2020-09-25 03:28:31,443 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-25 03:28:31,443 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [5348985]
[2020-09-25 03:28:31,443 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-25 03:28:31,453 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-25 03:28:31,463 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:31,480 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:31,500 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:31,527 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:31,575 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:31,693 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:32,414 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:32,507 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:33,174 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:33,322 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:33,446 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:33,691 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:33,851 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:34,902 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:34,918 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:36,458 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-09-25 03:28:36,458 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 94
[2020-09-25 03:28:36,458 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 15
[2020-09-25 03:28:36,458 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 5004
[2020-09-25 03:28:36,459 FATAL L256   erpolLogProxyWrapper]: Heuristic: WIDEST
[2020-09-25 03:28:36,459 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 8
[2020-09-25 03:28:36,459 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 31
[2020-09-25 03:28:36,459 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 46
[2020-09-25 03:28:36,459 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-25 03:28:36,537 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-25 03:28:36,538 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-25 03:28:36,539 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:36,540 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-09-25 03:28:36,540 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 9
[2020-09-25 03:28:36,540 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-25 03:28:36,540 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 1
[2020-09-25 03:28:36,540 FATAL L256   erpolLogProxyWrapper]: Heuristic: WIDEST
[2020-09-25 03:28:36,540 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-25 03:28:36,541 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-25 03:28:36,541 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-25 03:28:36,541 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-25 03:28:36,542 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42
[2020-09-25 03:28:36,543 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-25 03:28:36,544 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:36,549 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-09-25 03:28:36,549 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 10
[2020-09-25 03:28:36,549 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-25 03:28:36,549 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 5
[2020-09-25 03:28:36,549 FATAL L256   erpolLogProxyWrapper]: Heuristic: WIDEST
[2020-09-25 03:28:36,549 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 2
[2020-09-25 03:28:36,550 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-25 03:28:36,550 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 6
[2020-09-25 03:28:36,550 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-25 03:28:36,551 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57
[2020-09-25 03:28:36,552 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-25 03:28:36,554 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:36,564 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-09-25 03:28:36,564 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 10
[2020-09-25 03:28:36,564 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-25 03:28:36,564 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 11
[2020-09-25 03:28:36,564 FATAL L256   erpolLogProxyWrapper]: Heuristic: WIDEST
[2020-09-25 03:28:36,565 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 2
[2020-09-25 03:28:36,565 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-25 03:28:36,565 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 6
[2020-09-25 03:28:36,565 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-25 03:28:36,567 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66
[2020-09-25 03:28:36,567 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-25 03:28:36,568 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:36,571 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-09-25 03:28:36,572 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 10
[2020-09-25 03:28:36,572 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-25 03:28:36,572 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 3
[2020-09-25 03:28:36,572 FATAL L256   erpolLogProxyWrapper]: Heuristic: WIDEST
[2020-09-25 03:28:36,572 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-25 03:28:36,572 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 7
[2020-09-25 03:28:36,572 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-25 03:28:36,573 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-25 03:28:36,585 INFO  L134       CoverageAnalysis]: Checked inductivity of 62 backedges. 22 proven. 17 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked.
[2020-09-25 03:28:36,585 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [5348985]
[2020-09-25 03:28:36,586 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-09-25 03:28:36,586 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10
[2020-09-25 03:28:36,587 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484933648]
[2020-09-25 03:28:36,587 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 10 states
[2020-09-25 03:28:36,587 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-25 03:28:36,588 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants.
[2020-09-25 03:28:36,588 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90
[2020-09-25 03:28:36,588 INFO  L87              Difference]: Start difference. First operand 170 states and 206 transitions. Second operand 10 states.
[2020-09-25 03:28:37,068 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-25 03:28:37,069 INFO  L93              Difference]: Finished difference Result 297 states and 363 transitions.
[2020-09-25 03:28:37,069 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. 
[2020-09-25 03:28:37,069 INFO  L78                 Accepts]: Start accepts. Automaton has 10 states. Word has length 79
[2020-09-25 03:28:37,070 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-25 03:28:37,073 INFO  L225             Difference]: With dead ends: 297
[2020-09-25 03:28:37,073 INFO  L226             Difference]: Without dead ends: 167
[2020-09-25 03:28:37,074 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=158, Invalid=442, Unknown=0, NotChecked=0, Total=600
[2020-09-25 03:28:37,075 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 167 states.
[2020-09-25 03:28:37,092 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 144.
[2020-09-25 03:28:37,092 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 144 states.
[2020-09-25 03:28:37,094 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 169 transitions.
[2020-09-25 03:28:37,094 INFO  L78                 Accepts]: Start accepts. Automaton has 144 states and 169 transitions. Word has length 79
[2020-09-25 03:28:37,095 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-09-25 03:28:37,095 INFO  L479      AbstractCegarLoop]: Abstraction has 144 states and 169 transitions.
[2020-09-25 03:28:37,095 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 10 states.
[2020-09-25 03:28:37,096 INFO  L276                IsEmpty]: Start isEmpty. Operand 144 states and 169 transitions.
[2020-09-25 03:28:37,097 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 86
[2020-09-25 03:28:37,097 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-25 03:28:37,097 INFO  L422         BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 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]
[2020-09-25 03:28:37,097 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6
[2020-09-25 03:28:37,097 INFO  L427      AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-25 03:28:37,098 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-25 03:28:37,098 INFO  L82        PathProgramCache]: Analyzing trace with hash 2053224481, now seen corresponding path program 2 times
[2020-09-25 03:28:37,098 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-25 03:28:37,098 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1619968036]
[2020-09-25 03:28:37,099 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-25 03:28:37,108 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-25 03:28:37,117 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:37,151 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:37,204 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:37,424 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:37,484 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:37,521 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:37,582 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:38,153 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:38,174 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:38,393 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:38,412 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:38,490 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:38,739 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:39,178 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:39,310 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:42,113 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-09-25 03:28:42,114 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 100
[2020-09-25 03:28:42,114 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 15
[2020-09-25 03:28:42,114 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 5004
[2020-09-25 03:28:42,114 FATAL L256   erpolLogProxyWrapper]: Heuristic: WIDEST
[2020-09-25 03:28:42,114 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 9
[2020-09-25 03:28:42,115 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 39
[2020-09-25 03:28:42,115 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 31
[2020-09-25 03:28:42,115 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-25 03:28:42,204 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-25 03:28:42,205 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-25 03:28:42,207 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:42,207 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-09-25 03:28:42,207 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 9
[2020-09-25 03:28:42,208 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-25 03:28:42,208 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 1
[2020-09-25 03:28:42,208 FATAL L256   erpolLogProxyWrapper]: Heuristic: WIDEST
[2020-09-25 03:28:42,208 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-25 03:28:42,208 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-25 03:28:42,208 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-25 03:28:42,208 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-25 03:28:42,210 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48
[2020-09-25 03:28:42,211 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-25 03:28:42,212 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:42,218 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-09-25 03:28:42,219 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 10
[2020-09-25 03:28:42,219 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-25 03:28:42,219 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 7
[2020-09-25 03:28:42,219 FATAL L256   erpolLogProxyWrapper]: Heuristic: WIDEST
[2020-09-25 03:28:42,219 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 2
[2020-09-25 03:28:42,219 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-25 03:28:42,219 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 6
[2020-09-25 03:28:42,220 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-25 03:28:42,221 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63
[2020-09-25 03:28:42,221 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-25 03:28:42,223 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:42,226 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-09-25 03:28:42,226 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 10
[2020-09-25 03:28:42,226 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-25 03:28:42,226 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 3
[2020-09-25 03:28:42,226 FATAL L256   erpolLogProxyWrapper]: Heuristic: WIDEST
[2020-09-25 03:28:42,226 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-25 03:28:42,227 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 7
[2020-09-25 03:28:42,227 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-25 03:28:42,227 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-25 03:28:42,228 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72
[2020-09-25 03:28:42,229 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-25 03:28:42,230 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:42,233 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-09-25 03:28:42,234 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 10
[2020-09-25 03:28:42,234 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-25 03:28:42,234 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 3
[2020-09-25 03:28:42,234 FATAL L256   erpolLogProxyWrapper]: Heuristic: WIDEST
[2020-09-25 03:28:42,234 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-25 03:28:42,234 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 7
[2020-09-25 03:28:42,235 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-25 03:28:42,235 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-25 03:28:42,240 INFO  L134       CoverageAnalysis]: Checked inductivity of 73 backedges. 37 proven. 11 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked.
[2020-09-25 03:28:42,240 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1619968036]
[2020-09-25 03:28:42,240 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-09-25 03:28:42,240 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11
[2020-09-25 03:28:42,240 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152016617]
[2020-09-25 03:28:42,241 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 11 states
[2020-09-25 03:28:42,241 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-25 03:28:42,241 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants.
[2020-09-25 03:28:42,241 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110
[2020-09-25 03:28:42,241 INFO  L87              Difference]: Start difference. First operand 144 states and 169 transitions. Second operand 11 states.
[2020-09-25 03:28:42,835 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-25 03:28:42,835 INFO  L93              Difference]: Finished difference Result 296 states and 357 transitions.
[2020-09-25 03:28:42,835 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. 
[2020-09-25 03:28:42,836 INFO  L78                 Accepts]: Start accepts. Automaton has 11 states. Word has length 85
[2020-09-25 03:28:42,836 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-25 03:28:42,837 INFO  L225             Difference]: With dead ends: 296
[2020-09-25 03:28:42,838 INFO  L226             Difference]: Without dead ends: 179
[2020-09-25 03:28:42,840 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=125, Invalid=381, Unknown=0, NotChecked=0, Total=506
[2020-09-25 03:28:42,840 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 179 states.
[2020-09-25 03:28:42,857 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 171.
[2020-09-25 03:28:42,858 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 171 states.
[2020-09-25 03:28:42,860 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 202 transitions.
[2020-09-25 03:28:42,860 INFO  L78                 Accepts]: Start accepts. Automaton has 171 states and 202 transitions. Word has length 85
[2020-09-25 03:28:42,860 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-09-25 03:28:42,861 INFO  L479      AbstractCegarLoop]: Abstraction has 171 states and 202 transitions.
[2020-09-25 03:28:42,861 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 11 states.
[2020-09-25 03:28:42,861 INFO  L276                IsEmpty]: Start isEmpty. Operand 171 states and 202 transitions.
[2020-09-25 03:28:42,862 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 92
[2020-09-25 03:28:42,862 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-25 03:28:42,862 INFO  L422         BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-25 03:28:42,863 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7
[2020-09-25 03:28:42,863 INFO  L427      AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-25 03:28:42,863 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-25 03:28:42,863 INFO  L82        PathProgramCache]: Analyzing trace with hash 909874190, now seen corresponding path program 3 times
[2020-09-25 03:28:42,864 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-25 03:28:42,864 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [889063334]
[2020-09-25 03:28:42,864 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-25 03:28:42,874 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-25 03:28:42,884 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:42,906 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:42,928 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:42,962 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:42,980 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:42,996 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:43,241 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:44,187 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:44,278 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:45,716 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:45,744 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:45,777 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:45,892 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:46,814 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:46,832 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:46,847 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:47,085 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:47,295 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:47,879 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-09-25 03:28:47,879 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 106
[2020-09-25 03:28:47,880 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 18
[2020-09-25 03:28:47,880 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 5004
[2020-09-25 03:28:47,880 FATAL L256   erpolLogProxyWrapper]: Heuristic: WIDEST
[2020-09-25 03:28:47,880 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 11
[2020-09-25 03:28:47,880 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 31
[2020-09-25 03:28:47,880 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 45
[2020-09-25 03:28:47,880 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-25 03:28:47,993 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-25 03:28:47,994 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-25 03:28:47,996 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:47,997 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-09-25 03:28:47,997 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 9
[2020-09-25 03:28:47,997 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-25 03:28:47,997 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 1
[2020-09-25 03:28:47,997 FATAL L256   erpolLogProxyWrapper]: Heuristic: WIDEST
[2020-09-25 03:28:47,997 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-25 03:28:47,998 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-25 03:28:47,998 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-25 03:28:47,998 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-25 03:28:47,999 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54
[2020-09-25 03:28:48,001 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-25 03:28:48,002 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:48,009 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-09-25 03:28:48,009 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 10
[2020-09-25 03:28:48,009 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-25 03:28:48,010 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 8
[2020-09-25 03:28:48,010 FATAL L256   erpolLogProxyWrapper]: Heuristic: WIDEST
[2020-09-25 03:28:48,010 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 2
[2020-09-25 03:28:48,010 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-25 03:28:48,010 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 6
[2020-09-25 03:28:48,011 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-25 03:28:48,012 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69
[2020-09-25 03:28:48,013 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-25 03:28:48,014 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:48,017 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-09-25 03:28:48,017 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 10
[2020-09-25 03:28:48,018 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-25 03:28:48,018 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 4
[2020-09-25 03:28:48,018 FATAL L256   erpolLogProxyWrapper]: Heuristic: WIDEST
[2020-09-25 03:28:48,018 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-25 03:28:48,018 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 7
[2020-09-25 03:28:48,018 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-25 03:28:48,019 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-25 03:28:48,020 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78
[2020-09-25 03:28:48,020 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-25 03:28:48,021 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:48,025 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-09-25 03:28:48,025 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 10
[2020-09-25 03:28:48,025 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-25 03:28:48,025 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 3
[2020-09-25 03:28:48,025 FATAL L256   erpolLogProxyWrapper]: Heuristic: WIDEST
[2020-09-25 03:28:48,026 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-25 03:28:48,026 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 7
[2020-09-25 03:28:48,026 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-25 03:28:48,026 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-25 03:28:48,033 INFO  L134       CoverageAnalysis]: Checked inductivity of 93 backedges. 32 proven. 38 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked.
[2020-09-25 03:28:48,034 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [889063334]
[2020-09-25 03:28:48,034 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-09-25 03:28:48,034 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13
[2020-09-25 03:28:48,034 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636364240]
[2020-09-25 03:28:48,035 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 13 states
[2020-09-25 03:28:48,035 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-25 03:28:48,035 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants.
[2020-09-25 03:28:48,035 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156
[2020-09-25 03:28:48,036 INFO  L87              Difference]: Start difference. First operand 171 states and 202 transitions. Second operand 13 states.
[2020-09-25 03:28:48,803 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-25 03:28:48,803 INFO  L93              Difference]: Finished difference Result 334 states and 412 transitions.
[2020-09-25 03:28:48,804 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. 
[2020-09-25 03:28:48,805 INFO  L78                 Accepts]: Start accepts. Automaton has 13 states. Word has length 91
[2020-09-25 03:28:48,805 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-25 03:28:48,807 INFO  L225             Difference]: With dead ends: 334
[2020-09-25 03:28:48,808 INFO  L226             Difference]: Without dead ends: 240
[2020-09-25 03:28:48,809 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=241, Invalid=815, Unknown=0, NotChecked=0, Total=1056
[2020-09-25 03:28:48,810 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 240 states.
[2020-09-25 03:28:48,831 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 217.
[2020-09-25 03:28:48,831 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 217 states.
[2020-09-25 03:28:48,833 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 263 transitions.
[2020-09-25 03:28:48,834 INFO  L78                 Accepts]: Start accepts. Automaton has 217 states and 263 transitions. Word has length 91
[2020-09-25 03:28:48,834 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-09-25 03:28:48,834 INFO  L479      AbstractCegarLoop]: Abstraction has 217 states and 263 transitions.
[2020-09-25 03:28:48,834 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 13 states.
[2020-09-25 03:28:48,834 INFO  L276                IsEmpty]: Start isEmpty. Operand 217 states and 263 transitions.
[2020-09-25 03:28:48,836 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 104
[2020-09-25 03:28:48,836 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-25 03:28:48,836 INFO  L422         BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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]
[2020-09-25 03:28:48,837 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8
[2020-09-25 03:28:48,837 INFO  L427      AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-25 03:28:48,837 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-25 03:28:48,837 INFO  L82        PathProgramCache]: Analyzing trace with hash 642219639, now seen corresponding path program 4 times
[2020-09-25 03:28:48,837 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-25 03:28:48,838 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [861432347]
[2020-09-25 03:28:48,838 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-25 03:28:48,848 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-25 03:28:48,858 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:48,881 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:48,906 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:48,932 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:48,969 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:48,991 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:49,027 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:49,431 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:50,009 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 03:28:51,975 FATAL L256   erpolLogProxyWrapper]: Now shrinking...