/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem10_label15.c


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


This is Ultimate 0.1.25-c90d42b
[2020-09-24 17:15:15,350 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2020-09-24 17:15:15,354 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2020-09-24 17:15:15,380 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2020-09-24 17:15:15,381 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2020-09-24 17:15:15,382 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2020-09-24 17:15:15,384 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2020-09-24 17:15:15,386 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2020-09-24 17:15:15,388 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2020-09-24 17:15:15,389 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
[2020-09-24 17:15:15,393 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
[2020-09-24 17:15:15,394 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2020-09-24 17:15:15,395 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2020-09-24 17:15:15,396 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2020-09-24 17:15:15,397 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2020-09-24 17:15:15,402 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2020-09-24 17:15:15,404 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2020-09-24 17:15:15,405 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2020-09-24 17:15:15,409 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2020-09-24 17:15:15,412 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2020-09-24 17:15:15,415 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2020-09-24 17:15:15,417 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2020-09-24 17:15:15,421 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2020-09-24 17:15:15,422 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2020-09-24 17:15:15,431 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2020-09-24 17:15:15,432 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2020-09-24 17:15:15,432 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2020-09-24 17:15:15,435 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2020-09-24 17:15:15,436 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2020-09-24 17:15:15,440 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2020-09-24 17:15:15,441 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2020-09-24 17:15:15,442 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2020-09-24 17:15:15,443 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2020-09-24 17:15:15,444 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2020-09-24 17:15:15,445 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2020-09-24 17:15:15,446 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
[2020-09-24 17:15:15,456 INFO  L184        SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2020-09-24 17:15:15,456 INFO  L184        SettingsManager]: ReqParser provides no preferences, ignoring...
[2020-09-24 17:15:15,457 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
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[2020-09-24 17:15:15,459 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2020-09-24 17:15:15,460 INFO  L101        SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf
[2020-09-24 17:15:15,517 INFO  L113        SettingsManager]: Loading preferences was successful
[2020-09-24 17:15:15,518 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2020-09-24 17:15:15,519 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2020-09-24 17:15:15,520 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2020-09-24 17:15:15,520 INFO  L138        SettingsManager]:  * Use SBE=true
[2020-09-24 17:15:15,521 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2020-09-24 17:15:15,521 INFO  L138        SettingsManager]:  * sizeof long=4
[2020-09-24 17:15:15,521 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2020-09-24 17:15:15,521 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2020-09-24 17:15:15,521 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2020-09-24 17:15:15,522 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2020-09-24 17:15:15,522 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2020-09-24 17:15:15,522 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2020-09-24 17:15:15,522 INFO  L138        SettingsManager]:  * sizeof long double=12
[2020-09-24 17:15:15,522 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2020-09-24 17:15:15,523 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2020-09-24 17:15:15,524 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2020-09-24 17:15:15,524 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2020-09-24 17:15:15,525 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2020-09-24 17:15:15,526 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2020-09-24 17:15:15,526 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2020-09-24 17:15:15,528 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-09-24 17:15:15,529 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2020-09-24 17:15:15,529 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2020-09-24 17:15:15,530 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2020-09-24 17:15:15,530 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2020-09-24 17:15:15,530 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-09-24 17:15:15,531 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2020-09-24 17:15:15,531 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2020-09-24 17:15:15,531 INFO  L138        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SingleStatement
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;log-additional-information=true;
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;log-additional-information=true;
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;log-additional-information=true;
[2020-09-24 17:15:16,015 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2020-09-24 17:15:16,046 INFO  L258   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2020-09-24 17:15:16,053 INFO  L214   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2020-09-24 17:15:16,055 INFO  L271        PluginConnector]: Initializing CDTParser...
[2020-09-24 17:15:16,056 INFO  L275        PluginConnector]: CDTParser initialized
[2020-09-24 17:15:16,058 INFO  L429   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem10_label15.c
[2020-09-24 17:15:16,149 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/27534edc5/2d82f9a6b06d46a78d1dde414598359e/FLAG2be7c4535
[2020-09-24 17:15:16,821 INFO  L306              CDTParser]: Found 1 translation units.
[2020-09-24 17:15:16,822 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem10_label15.c
[2020-09-24 17:15:16,835 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/27534edc5/2d82f9a6b06d46a78d1dde414598359e/FLAG2be7c4535
[2020-09-24 17:15:17,057 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/27534edc5/2d82f9a6b06d46a78d1dde414598359e
[2020-09-24 17:15:17,070 INFO  L296   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2020-09-24 17:15:17,076 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2020-09-24 17:15:17,078 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2020-09-24 17:15:17,078 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2020-09-24 17:15:17,082 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2020-09-24 17:15:17,083 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 05:15:17" (1/1) ...
[2020-09-24 17:15:17,088 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d85ba32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:15:17, skipping insertion in model container
[2020-09-24 17:15:17,088 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 05:15:17" (1/1) ...
[2020-09-24 17:15:17,097 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2020-09-24 17:15:17,154 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2020-09-24 17:15:17,696 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-09-24 17:15:17,707 INFO  L203         MainTranslator]: Completed pre-run
[2020-09-24 17:15:17,921 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-09-24 17:15:17,940 INFO  L208         MainTranslator]: Completed translation
[2020-09-24 17:15:17,940 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:15:17 WrapperNode
[2020-09-24 17:15:17,941 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2020-09-24 17:15:17,942 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2020-09-24 17:15:17,942 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2020-09-24 17:15:17,942 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2020-09-24 17:15:17,957 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:15:17" (1/1) ...
[2020-09-24 17:15:17,958 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:15:17" (1/1) ...
[2020-09-24 17:15:17,980 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:15:17" (1/1) ...
[2020-09-24 17:15:17,985 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:15:17" (1/1) ...
[2020-09-24 17:15:18,022 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:15:17" (1/1) ...
[2020-09-24 17:15:18,037 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:15:17" (1/1) ...
[2020-09-24 17:15:18,043 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:15:17" (1/1) ...
[2020-09-24 17:15:18,052 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2020-09-24 17:15:18,053 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2020-09-24 17:15:18,053 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2020-09-24 17:15:18,053 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2020-09-24 17:15:18,054 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:15:17" (1/1) ...
No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-09-24 17:15:18,146 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2020-09-24 17:15:18,146 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2020-09-24 17:15:18,146 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output
[2020-09-24 17:15:18,146 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2020-09-24 17:15:18,147 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output
[2020-09-24 17:15:18,147 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2020-09-24 17:15:18,147 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int
[2020-09-24 17:15:18,147 INFO  L130     BoogieDeclarations]: Found specification of procedure exit
[2020-09-24 17:15:18,147 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2020-09-24 17:15:18,147 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2020-09-24 17:15:18,148 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2020-09-24 17:15:19,608 INFO  L290             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2020-09-24 17:15:19,608 INFO  L295             CfgBuilder]: Removed 1 assume(true) statements.
[2020-09-24 17:15:19,617 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 05:15:19 BoogieIcfgContainer
[2020-09-24 17:15:19,617 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2020-09-24 17:15:19,619 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2020-09-24 17:15:19,619 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2020-09-24 17:15:19,622 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2020-09-24 17:15:19,623 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 05:15:17" (1/3) ...
[2020-09-24 17:15:19,624 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69fd4e84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 05:15:19, skipping insertion in model container
[2020-09-24 17:15:19,624 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:15:17" (2/3) ...
[2020-09-24 17:15:19,625 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69fd4e84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 05:15:19, skipping insertion in model container
[2020-09-24 17:15:19,625 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 05:15:19" (3/3) ...
[2020-09-24 17:15:19,627 INFO  L109   eAbstractionObserver]: Analyzing ICFG Problem10_label15.c
[2020-09-24 17:15:19,639 INFO  L157   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION
[2020-09-24 17:15:19,650 INFO  L169   ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2020-09-24 17:15:19,672 INFO  L251      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2020-09-24 17:15:19,715 INFO  L375      AbstractCegarLoop]: Interprodecural is true
[2020-09-24 17:15:19,716 INFO  L376      AbstractCegarLoop]: Hoare is true
[2020-09-24 17:15:19,717 INFO  L377      AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation
[2020-09-24 17:15:19,717 INFO  L378      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2020-09-24 17:15:19,717 INFO  L379      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2020-09-24 17:15:19,717 INFO  L380      AbstractCegarLoop]: Difference is false
[2020-09-24 17:15:19,717 INFO  L381      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2020-09-24 17:15:19,717 INFO  L385      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2020-09-24 17:15:19,752 INFO  L276                IsEmpty]: Start isEmpty. Operand 456 states.
[2020-09-24 17:15:19,760 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 30
[2020-09-24 17:15:19,760 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-24 17:15:19,762 INFO  L422         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-24 17:15:19,762 INFO  L427      AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 17:15:19,769 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 17:15:19,769 INFO  L82        PathProgramCache]: Analyzing trace with hash -1814812065, now seen corresponding path program 1 times
[2020-09-24 17:15:19,778 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 17:15:19,778 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [856127885]
[2020-09-24 17:15:19,779 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 17:15:19,921 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 17:15:19,963 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:15:20,148 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:15:20,172 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:15:20,425 FATAL L256   erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set)
[2020-09-24 17:15:20,425 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 38
[2020-09-24 17:15:20,426 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 3
[2020-09-24 17:15:20,426 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 497
[2020-09-24 17:15:20,428 FATAL L256   erpolLogProxyWrapper]: Heuristic: RANDOM
[2020-09-24 17:15:20,428 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 6
[2020-09-24 17:15:20,429 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 12
[2020-09-24 17:15:20,429 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 25
[2020-09-24 17:15:20,429 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 2
[2020-09-24 17:15:20,545 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-24 17:15:20,552 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 17:15:20,557 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:15:20,576 FATAL L256   erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set)
[2020-09-24 17:15:20,577 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 18
[2020-09-24 17:15:20,577 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 17:15:20,577 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 23
[2020-09-24 17:15:20,578 FATAL L256   erpolLogProxyWrapper]: Heuristic: RANDOM
[2020-09-24 17:15:20,578 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 2
[2020-09-24 17:15:20,578 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 17:15:20,578 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 8
[2020-09-24 17:15:20,579 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-24 17:15:20,598 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-09-24 17:15:20,599 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [856127885]
[2020-09-24 17:15:20,602 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-09-24 17:15:20,602 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-09-24 17:15:20,603 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094178045]
[2020-09-24 17:15:20,609 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-09-24 17:15:20,610 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-24 17:15:20,628 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-09-24 17:15:20,629 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-09-24 17:15:20,632 INFO  L87              Difference]: Start difference. First operand 456 states. Second operand 4 states.
[2020-09-24 17:15:22,572 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-24 17:15:22,573 INFO  L93              Difference]: Finished difference Result 1069 states and 1495 transitions.
[2020-09-24 17:15:22,573 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2020-09-24 17:15:22,575 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 29
[2020-09-24 17:15:22,576 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-24 17:15:22,612 INFO  L225             Difference]: With dead ends: 1069
[2020-09-24 17:15:22,612 INFO  L226             Difference]: Without dead ends: 555
[2020-09-24 17:15:22,624 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2020-09-24 17:15:22,645 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 555 states.
[2020-09-24 17:15:22,717 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 543.
[2020-09-24 17:15:22,720 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 543 states.
[2020-09-24 17:15:22,724 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 543 states to 543 states and 670 transitions.
[2020-09-24 17:15:22,726 INFO  L78                 Accepts]: Start accepts. Automaton has 543 states and 670 transitions. Word has length 29
[2020-09-24 17:15:22,727 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-09-24 17:15:22,727 INFO  L479      AbstractCegarLoop]: Abstraction has 543 states and 670 transitions.
[2020-09-24 17:15:22,727 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2020-09-24 17:15:22,727 INFO  L276                IsEmpty]: Start isEmpty. Operand 543 states and 670 transitions.
[2020-09-24 17:15:22,734 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 110
[2020-09-24 17:15:22,734 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-24 17:15:22,735 INFO  L422         BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-24 17:15:22,735 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2020-09-24 17:15:22,735 INFO  L427      AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 17:15:22,736 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 17:15:22,736 INFO  L82        PathProgramCache]: Analyzing trace with hash -1743569131, now seen corresponding path program 1 times
[2020-09-24 17:15:22,736 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 17:15:22,737 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [436297300]
[2020-09-24 17:15:22,737 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 17:15:22,772 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 17:15:22,811 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:15:22,966 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:15:23,499 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:15:23,635 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:15:24,639 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:15:24,677 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:15:24,757 FATAL L256   erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set)
[2020-09-24 17:15:24,757 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 120
[2020-09-24 17:15:24,758 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 6
[2020-09-24 17:15:24,758 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 1983
[2020-09-24 17:15:24,758 FATAL L256   erpolLogProxyWrapper]: Heuristic: RANDOM
[2020-09-24 17:15:24,758 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 8
[2020-09-24 17:15:24,758 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 13
[2020-09-24 17:15:24,759 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 106
[2020-09-24 17:15:24,759 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-24 17:15:24,814 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-24 17:15:24,819 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 17:15:24,822 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:15:24,836 FATAL L256   erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set)
[2020-09-24 17:15:24,837 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 18
[2020-09-24 17:15:24,837 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 17:15:24,837 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 16
[2020-09-24 17:15:24,837 FATAL L256   erpolLogProxyWrapper]: Heuristic: RANDOM
[2020-09-24 17:15:24,838 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 2
[2020-09-24 17:15:24,838 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 17:15:24,838 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 9
[2020-09-24 17:15:24,838 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-24 17:15:24,858 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21
[2020-09-24 17:15:24,873 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 17:15:24,886 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:15:24,954 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:15:24,980 FATAL L256   erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set)
[2020-09-24 17:15:24,980 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 76
[2020-09-24 17:15:24,980 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 2
[2020-09-24 17:15:24,981 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 106
[2020-09-24 17:15:24,981 FATAL L256   erpolLogProxyWrapper]: Heuristic: RANDOM
[2020-09-24 17:15:24,981 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 4
[2020-09-24 17:15:24,981 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 1
[2020-09-24 17:15:24,982 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 75
[2020-09-24 17:15:24,982 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-24 17:15:25,051 INFO  L134       CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked.
[2020-09-24 17:15:25,051 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [436297300]
[2020-09-24 17:15:25,051 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-09-24 17:15:25,052 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7
[2020-09-24 17:15:25,052 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275922142]
[2020-09-24 17:15:25,054 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 7 states
[2020-09-24 17:15:25,054 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-24 17:15:25,054 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2020-09-24 17:15:25,055 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42
[2020-09-24 17:15:25,055 INFO  L87              Difference]: Start difference. First operand 543 states and 670 transitions. Second operand 7 states.
[2020-09-24 17:15:27,405 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-24 17:15:27,405 INFO  L93              Difference]: Finished difference Result 1451 states and 1877 transitions.
[2020-09-24 17:15:27,405 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. 
[2020-09-24 17:15:27,406 INFO  L78                 Accepts]: Start accepts. Automaton has 7 states. Word has length 109
[2020-09-24 17:15:27,406 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-24 17:15:27,412 INFO  L225             Difference]: With dead ends: 1451
[2020-09-24 17:15:27,412 INFO  L226             Difference]: Without dead ends: 923
[2020-09-24 17:15:27,416 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132
[2020-09-24 17:15:27,417 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 923 states.
[2020-09-24 17:15:27,458 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 923 to 861.
[2020-09-24 17:15:27,458 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 861 states.
[2020-09-24 17:15:27,463 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 861 states to 861 states and 1031 transitions.
[2020-09-24 17:15:27,463 INFO  L78                 Accepts]: Start accepts. Automaton has 861 states and 1031 transitions. Word has length 109
[2020-09-24 17:15:27,464 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-09-24 17:15:27,464 INFO  L479      AbstractCegarLoop]: Abstraction has 861 states and 1031 transitions.
[2020-09-24 17:15:27,464 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 7 states.
[2020-09-24 17:15:27,464 INFO  L276                IsEmpty]: Start isEmpty. Operand 861 states and 1031 transitions.
[2020-09-24 17:15:27,467 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 119
[2020-09-24 17:15:27,467 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-24 17:15:27,467 INFO  L422         BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 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]
[2020-09-24 17:15:27,467 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2020-09-24 17:15:27,468 INFO  L427      AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 17:15:27,468 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 17:15:27,468 INFO  L82        PathProgramCache]: Analyzing trace with hash -162546798, now seen corresponding path program 1 times
[2020-09-24 17:15:27,468 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 17:15:27,469 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [334581423]
[2020-09-24 17:15:27,469 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 17:15:27,505 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 17:15:27,536 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:15:27,652 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:15:27,760 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:15:27,940 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:15:28,401 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:15:30,476 FATAL L256   erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set)
[2020-09-24 17:15:30,476 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 129
[2020-09-24 17:15:30,476 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 5
[2020-09-24 17:15:30,476 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 2968
[2020-09-24 17:15:30,477 FATAL L256   erpolLogProxyWrapper]: Heuristic: RANDOM
[2020-09-24 17:15:30,477 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 5
[2020-09-24 17:15:30,477 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 103
[2020-09-24 17:15:30,477 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 25
[2020-09-24 17:15:30,478 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-24 17:15:30,545 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-24 17:15:30,547 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 17:15:30,549 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:15:30,558 FATAL L256   erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set)
[2020-09-24 17:15:30,558 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 18
[2020-09-24 17:15:30,558 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 17:15:30,558 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 10
[2020-09-24 17:15:30,559 FATAL L256   erpolLogProxyWrapper]: Heuristic: RANDOM
[2020-09-24 17:15:30,559 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-24 17:15:30,559 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 17:15:30,559 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-24 17:15:30,560 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-24 17:15:30,574 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21
[2020-09-24 17:15:30,593 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 17:15:30,611 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:15:30,732 FATAL L256   erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set)
[2020-09-24 17:15:30,732 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 85
[2020-09-24 17:15:30,732 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 17:15:30,733 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 138
[2020-09-24 17:15:30,733 FATAL L256   erpolLogProxyWrapper]: Heuristic: RANDOM
[2020-09-24 17:15:30,733 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 3
[2020-09-24 17:15:30,733 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 17:15:30,734 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 75
[2020-09-24 17:15:30,734 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-24 17:15:30,787 INFO  L134       CoverageAnalysis]: Checked inductivity of 13 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-09-24 17:15:30,787 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [334581423]
[2020-09-24 17:15:30,787 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-09-24 17:15:30,788 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6
[2020-09-24 17:15:30,788 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840836929]
[2020-09-24 17:15:30,788 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 6 states
[2020-09-24 17:15:30,789 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-24 17:15:30,789 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2020-09-24 17:15:30,789 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30
[2020-09-24 17:15:30,789 INFO  L87              Difference]: Start difference. First operand 861 states and 1031 transitions. Second operand 6 states.
[2020-09-24 17:15:33,631 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-24 17:15:33,631 INFO  L93              Difference]: Finished difference Result 2867 states and 3616 transitions.
[2020-09-24 17:15:33,632 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. 
[2020-09-24 17:15:33,632 INFO  L78                 Accepts]: Start accepts. Automaton has 6 states. Word has length 118
[2020-09-24 17:15:33,633 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-24 17:15:33,646 INFO  L225             Difference]: With dead ends: 2867
[2020-09-24 17:15:33,646 INFO  L226             Difference]: Without dead ends: 2021
[2020-09-24 17:15:33,685 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56
[2020-09-24 17:15:33,689 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 2021 states.
[2020-09-24 17:15:33,759 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 2021 to 1651.
[2020-09-24 17:15:33,760 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 1651 states.
[2020-09-24 17:15:33,772 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 1651 states to 1651 states and 2084 transitions.
[2020-09-24 17:15:33,773 INFO  L78                 Accepts]: Start accepts. Automaton has 1651 states and 2084 transitions. Word has length 118
[2020-09-24 17:15:33,773 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-09-24 17:15:33,774 INFO  L479      AbstractCegarLoop]: Abstraction has 1651 states and 2084 transitions.
[2020-09-24 17:15:33,774 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 6 states.
[2020-09-24 17:15:33,774 INFO  L276                IsEmpty]: Start isEmpty. Operand 1651 states and 2084 transitions.
[2020-09-24 17:15:33,789 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 220
[2020-09-24 17:15:33,790 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-24 17:15:33,790 INFO  L422         BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 1, 1]
[2020-09-24 17:15:33,790 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2020-09-24 17:15:33,791 INFO  L427      AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 17:15:33,791 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 17:15:33,791 INFO  L82        PathProgramCache]: Analyzing trace with hash -656468272, now seen corresponding path program 1 times
[2020-09-24 17:15:33,794 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 17:15:33,795 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1391806794]
[2020-09-24 17:15:33,795 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 17:15:33,844 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 17:15:33,896 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:15:33,988 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:15:34,154 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:15:35,454 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:15:35,880 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:15:36,811 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:15:38,653 FATAL L256   erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set)
[2020-09-24 17:15:38,653 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 232
[2020-09-24 17:15:38,654 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 6
[2020-09-24 17:15:38,661 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 4803
[2020-09-24 17:15:38,662 FATAL L256   erpolLogProxyWrapper]: Heuristic: RANDOM
[2020-09-24 17:15:38,662 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 6
[2020-09-24 17:15:38,662 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 96
[2020-09-24 17:15:38,662 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 135
[2020-09-24 17:15:38,662 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-24 17:15:38,737 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-24 17:15:38,740 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 17:15:38,743 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:15:38,749 FATAL L256   erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set)
[2020-09-24 17:15:38,749 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 18
[2020-09-24 17:15:38,750 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 17:15:38,750 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 8
[2020-09-24 17:15:38,750 FATAL L256   erpolLogProxyWrapper]: Heuristic: RANDOM
[2020-09-24 17:15:38,750 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-24 17:15:38,750 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 17:15:38,751 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-24 17:15:38,751 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-24 17:15:38,763 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21
[2020-09-24 17:15:38,775 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 17:15:38,788 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:15:38,849 FATAL L256   erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set)
[2020-09-24 17:15:38,849 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 75
[2020-09-24 17:15:38,849 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 17:15:38,849 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 72
[2020-09-24 17:15:38,850 FATAL L256   erpolLogProxyWrapper]: Heuristic: RANDOM
[2020-09-24 17:15:38,850 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 2
[2020-09-24 17:15:38,850 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 17:15:38,850 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 67
[2020-09-24 17:15:38,851 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-24 17:15:38,871 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100
[2020-09-24 17:15:38,891 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 17:15:38,912 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:15:38,999 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:15:39,117 FATAL L256   erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set)
[2020-09-24 17:15:39,118 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 107
[2020-09-24 17:15:39,118 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 2
[2020-09-24 17:15:39,118 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 224
[2020-09-24 17:15:39,118 FATAL L256   erpolLogProxyWrapper]: Heuristic: RANDOM
[2020-09-24 17:15:39,118 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 4
[2020-09-24 17:15:39,119 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 1
[2020-09-24 17:15:39,119 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 106
[2020-09-24 17:15:39,119 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-24 17:15:39,262 INFO  L134       CoverageAnalysis]: Checked inductivity of 102 backedges. 82 proven. 9 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked.
[2020-09-24 17:15:39,262 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1391806794]
[2020-09-24 17:15:39,263 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-09-24 17:15:39,263 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6
[2020-09-24 17:15:39,263 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246601667]
[2020-09-24 17:15:39,264 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 6 states
[2020-09-24 17:15:39,264 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-24 17:15:39,264 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2020-09-24 17:15:39,265 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30
[2020-09-24 17:15:39,265 INFO  L87              Difference]: Start difference. First operand 1651 states and 2084 transitions. Second operand 6 states.
[2020-09-24 17:15:41,222 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-24 17:15:41,227 INFO  L93              Difference]: Finished difference Result 4101 states and 5413 transitions.
[2020-09-24 17:15:41,228 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. 
[2020-09-24 17:15:41,228 INFO  L78                 Accepts]: Start accepts. Automaton has 6 states. Word has length 219
[2020-09-24 17:15:41,229 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-24 17:15:41,246 INFO  L225             Difference]: With dead ends: 4101
[2020-09-24 17:15:41,246 INFO  L226             Difference]: Without dead ends: 2465
[2020-09-24 17:15:41,254 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56
[2020-09-24 17:15:41,258 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 2465 states.
[2020-09-24 17:15:41,337 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 2465 to 2131.
[2020-09-24 17:15:41,337 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 2131 states.
[2020-09-24 17:15:41,347 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 2131 states to 2131 states and 2638 transitions.
[2020-09-24 17:15:41,347 INFO  L78                 Accepts]: Start accepts. Automaton has 2131 states and 2638 transitions. Word has length 219
[2020-09-24 17:15:41,349 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-09-24 17:15:41,349 INFO  L479      AbstractCegarLoop]: Abstraction has 2131 states and 2638 transitions.
[2020-09-24 17:15:41,349 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 6 states.
[2020-09-24 17:15:41,349 INFO  L276                IsEmpty]: Start isEmpty. Operand 2131 states and 2638 transitions.
[2020-09-24 17:15:41,354 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 221
[2020-09-24 17:15:41,355 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-24 17:15:41,355 INFO  L422         BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-24 17:15:41,355 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3
[2020-09-24 17:15:41,356 INFO  L427      AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 17:15:41,356 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 17:15:41,356 INFO  L82        PathProgramCache]: Analyzing trace with hash 2145286015, now seen corresponding path program 1 times
[2020-09-24 17:15:41,356 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 17:15:41,357 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1281001174]
[2020-09-24 17:15:41,357 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 17:15:41,403 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 17:15:41,447 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:15:41,643 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:15:41,723 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:15:41,850 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:15:42,172 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:15:43,758 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:15:46,819 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:15:46,882 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:15:46,948 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:15:47,074 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:15:47,561 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:15:54,438 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:15:55,032 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:15:55,174 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:15:55,407 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:16:01,208 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:16:01,956 FATAL L256   erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set)
[2020-09-24 17:16:01,956 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 233
[2020-09-24 17:16:01,956 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 16
[2020-09-24 17:16:01,956 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 20549
[2020-09-24 17:16:01,956 FATAL L256   erpolLogProxyWrapper]: Heuristic: RANDOM
[2020-09-24 17:16:01,957 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 4
[2020-09-24 17:16:01,957 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 209
[2020-09-24 17:16:01,957 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 23
[2020-09-24 17:16:01,957 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-24 17:16:02,031 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-24 17:16:02,033 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 17:16:02,037 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:16:02,044 FATAL L256   erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set)
[2020-09-24 17:16:02,045 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 18
[2020-09-24 17:16:02,045 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 17:16:02,045 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 11
[2020-09-24 17:16:02,045 FATAL L256   erpolLogProxyWrapper]: Heuristic: RANDOM
[2020-09-24 17:16:02,049 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-24 17:16:02,050 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 17:16:02,050 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-24 17:16:02,050 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 4
[2020-09-24 17:16:02,070 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21
[2020-09-24 17:16:02,075 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 17:16:02,081 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:16:02,117 FATAL L256   erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set)
[2020-09-24 17:16:02,117 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 85
[2020-09-24 17:16:02,118 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 17:16:02,118 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 40
[2020-09-24 17:16:02,118 FATAL L256   erpolLogProxyWrapper]: Heuristic: RANDOM
[2020-09-24 17:16:02,119 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-24 17:16:02,122 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 17:16:02,123 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-24 17:16:02,123 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 4
[2020-09-24 17:16:02,156 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110
[2020-09-24 17:16:02,181 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 17:16:02,202 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:16:02,304 FATAL L256   erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set)
[2020-09-24 17:16:02,305 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 98
[2020-09-24 17:16:02,305 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 17:16:02,305 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 122
[2020-09-24 17:16:02,306 FATAL L256   erpolLogProxyWrapper]: Heuristic: RANDOM
[2020-09-24 17:16:02,306 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 2
[2020-09-24 17:16:02,306 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 17:16:02,307 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 89
[2020-09-24 17:16:02,307 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-24 17:16:02,420 INFO  L134       CoverageAnalysis]: Checked inductivity of 111 backedges. 29 proven. 2 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked.
[2020-09-24 17:16:02,421 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1281001174]
[2020-09-24 17:16:02,421 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-09-24 17:16:02,422 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5
[2020-09-24 17:16:02,422 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606023674]
[2020-09-24 17:16:02,423 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 5 states
[2020-09-24 17:16:02,423 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-24 17:16:02,424 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2020-09-24 17:16:02,424 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20
[2020-09-24 17:16:02,424 INFO  L87              Difference]: Start difference. First operand 2131 states and 2638 transitions. Second operand 5 states.
[2020-09-24 17:16:04,405 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-24 17:16:04,405 INFO  L93              Difference]: Finished difference Result 4860 states and 6303 transitions.
[2020-09-24 17:16:04,407 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2020-09-24 17:16:04,407 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 220
[2020-09-24 17:16:04,408 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-24 17:16:04,421 INFO  L225             Difference]: With dead ends: 4860
[2020-09-24 17:16:04,422 INFO  L226             Difference]: Without dead ends: 2744
[2020-09-24 17:16:04,428 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30
[2020-09-24 17:16:04,432 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 2744 states.
[2020-09-24 17:16:04,497 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 2744 to 2730.
[2020-09-24 17:16:04,497 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 2730 states.
[2020-09-24 17:16:04,506 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 2730 states to 2730 states and 3420 transitions.
[2020-09-24 17:16:04,506 INFO  L78                 Accepts]: Start accepts. Automaton has 2730 states and 3420 transitions. Word has length 220
[2020-09-24 17:16:04,507 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-09-24 17:16:04,507 INFO  L479      AbstractCegarLoop]: Abstraction has 2730 states and 3420 transitions.
[2020-09-24 17:16:04,507 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2020-09-24 17:16:04,507 INFO  L276                IsEmpty]: Start isEmpty. Operand 2730 states and 3420 transitions.
[2020-09-24 17:16:04,515 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 267
[2020-09-24 17:16:04,515 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-24 17:16:04,516 INFO  L422         BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-24 17:16:04,516 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4
[2020-09-24 17:16:04,516 INFO  L427      AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 17:16:04,516 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 17:16:04,517 INFO  L82        PathProgramCache]: Analyzing trace with hash 2145967988, now seen corresponding path program 1 times
[2020-09-24 17:16:04,517 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 17:16:04,517 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1476298264]
[2020-09-24 17:16:04,517 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 17:16:04,548 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 17:16:04,583 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:16:04,681 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:16:05,020 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:16:06,193 FATAL L256   erpolLogProxyWrapper]: Now shrinking...