/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_label06.c


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


This is Ultimate 0.1.25-c90d42b
[2020-09-24 17:14:50,385 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2020-09-24 17:14:50,390 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2020-09-24 17:14:50,432 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2020-09-24 17:14:50,434 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2020-09-24 17:14:50,445 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2020-09-24 17:14:50,448 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2020-09-24 17:14:50,451 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2020-09-24 17:14:50,454 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2020-09-24 17:14:50,457 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
[2020-09-24 17:14:50,460 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
[2020-09-24 17:14:50,462 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2020-09-24 17:14:50,462 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2020-09-24 17:14:50,465 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2020-09-24 17:14:50,468 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2020-09-24 17:14:50,470 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2020-09-24 17:14:50,472 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2020-09-24 17:14:50,474 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2020-09-24 17:14:50,475 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2020-09-24 17:14:50,485 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2020-09-24 17:14:50,488 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2020-09-24 17:14:50,489 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2020-09-24 17:14:50,491 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2020-09-24 17:14:50,491 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2020-09-24 17:14:50,495 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2020-09-24 17:14:50,495 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2020-09-24 17:14:50,495 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2020-09-24 17:14:50,499 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2020-09-24 17:14:50,500 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2020-09-24 17:14:50,501 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2020-09-24 17:14:50,501 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2020-09-24 17:14:50,502 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2020-09-24 17:14:50,503 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2020-09-24 17:14:50,503 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2020-09-24 17:14:50,505 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2020-09-24 17:14:50,505 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
[2020-09-24 17:14:50,506 INFO  L184        SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
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[2020-09-24 17:14:50,506 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
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[2020-09-24 17:14:50,511 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2020-09-24 17:14:50,512 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 17:14:50,563 INFO  L113        SettingsManager]: Loading preferences was successful
[2020-09-24 17:14:50,563 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2020-09-24 17:14:50,565 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2020-09-24 17:14:50,565 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2020-09-24 17:14:50,565 INFO  L138        SettingsManager]:  * Use SBE=true
[2020-09-24 17:14:50,565 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2020-09-24 17:14:50,565 INFO  L138        SettingsManager]:  * sizeof long=4
[2020-09-24 17:14:50,566 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2020-09-24 17:14:50,566 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2020-09-24 17:14:50,567 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2020-09-24 17:14:50,568 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2020-09-24 17:14:50,568 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2020-09-24 17:14:50,568 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2020-09-24 17:14:50,569 INFO  L138        SettingsManager]:  * sizeof long double=12
[2020-09-24 17:14:50,569 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2020-09-24 17:14:50,569 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2020-09-24 17:14:50,569 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2020-09-24 17:14:50,569 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2020-09-24 17:14:50,570 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2020-09-24 17:14:50,570 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2020-09-24 17:14:50,570 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2020-09-24 17:14:50,570 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-09-24 17:14:50,570 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2020-09-24 17:14:50,571 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2020-09-24 17:14:50,571 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2020-09-24 17:14:50,571 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2020-09-24 17:14:50,571 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-09-24 17:14:50,571 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2020-09-24 17:14:50,572 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2020-09-24 17:14:50,572 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 17:14:51,038 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2020-09-24 17:14:51,064 INFO  L258   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2020-09-24 17:14:51,070 INFO  L214   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2020-09-24 17:14:51,073 INFO  L271        PluginConnector]: Initializing CDTParser...
[2020-09-24 17:14:51,073 INFO  L275        PluginConnector]: CDTParser initialized
[2020-09-24 17:14:51,075 INFO  L429   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem10_label06.c
[2020-09-24 17:14:51,151 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1c6c61993/1de3554076454a8ab761c1b47881f514/FLAG191798769
[2020-09-24 17:14:51,827 INFO  L306              CDTParser]: Found 1 translation units.
[2020-09-24 17:14:51,828 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem10_label06.c
[2020-09-24 17:14:51,841 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1c6c61993/1de3554076454a8ab761c1b47881f514/FLAG191798769
[2020-09-24 17:14:52,027 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1c6c61993/1de3554076454a8ab761c1b47881f514
[2020-09-24 17:14:52,041 INFO  L296   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2020-09-24 17:14:52,048 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2020-09-24 17:14:52,049 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2020-09-24 17:14:52,049 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2020-09-24 17:14:52,053 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2020-09-24 17:14:52,054 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 05:14:52" (1/1) ...
[2020-09-24 17:14:52,059 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@697b2ada and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:14:52, skipping insertion in model container
[2020-09-24 17:14:52,059 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 05:14:52" (1/1) ...
[2020-09-24 17:14:52,068 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2020-09-24 17:14:52,118 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2020-09-24 17:14:52,576 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-09-24 17:14:52,582 INFO  L203         MainTranslator]: Completed pre-run
[2020-09-24 17:14:52,822 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-09-24 17:14:52,840 INFO  L208         MainTranslator]: Completed translation
[2020-09-24 17:14:52,840 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:14:52 WrapperNode
[2020-09-24 17:14:52,840 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2020-09-24 17:14:52,841 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2020-09-24 17:14:52,841 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2020-09-24 17:14:52,841 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2020-09-24 17:14:52,856 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:14:52" (1/1) ...
[2020-09-24 17:14:52,856 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:14:52" (1/1) ...
[2020-09-24 17:14:52,875 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:14:52" (1/1) ...
[2020-09-24 17:14:52,875 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:14:52" (1/1) ...
[2020-09-24 17:14:52,913 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:14:52" (1/1) ...
[2020-09-24 17:14:52,935 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:14:52" (1/1) ...
[2020-09-24 17:14:52,942 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:14:52" (1/1) ...
[2020-09-24 17:14:52,951 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2020-09-24 17:14:52,952 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2020-09-24 17:14:52,952 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2020-09-24 17:14:52,952 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2020-09-24 17:14:52,953 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:14:52" (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 17:14:53,043 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2020-09-24 17:14:53,043 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2020-09-24 17:14:53,043 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output
[2020-09-24 17:14:53,044 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2020-09-24 17:14:53,044 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output
[2020-09-24 17:14:53,044 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2020-09-24 17:14:53,044 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int
[2020-09-24 17:14:53,044 INFO  L130     BoogieDeclarations]: Found specification of procedure exit
[2020-09-24 17:14:53,045 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2020-09-24 17:14:53,045 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2020-09-24 17:14:53,045 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2020-09-24 17:14:54,515 INFO  L290             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2020-09-24 17:14:54,516 INFO  L295             CfgBuilder]: Removed 1 assume(true) statements.
[2020-09-24 17:14:54,531 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 05:14:54 BoogieIcfgContainer
[2020-09-24 17:14:54,532 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2020-09-24 17:14:54,534 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2020-09-24 17:14:54,535 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2020-09-24 17:14:54,539 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2020-09-24 17:14:54,539 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 05:14:52" (1/3) ...
[2020-09-24 17:14:54,541 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6639092e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 05:14:54, skipping insertion in model container
[2020-09-24 17:14:54,542 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:14:52" (2/3) ...
[2020-09-24 17:14:54,542 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6639092e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 05:14:54, skipping insertion in model container
[2020-09-24 17:14:54,543 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 05:14:54" (3/3) ...
[2020-09-24 17:14:54,547 INFO  L109   eAbstractionObserver]: Analyzing ICFG Problem10_label06.c
[2020-09-24 17:14:54,561 INFO  L157   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION
[2020-09-24 17:14:54,576 INFO  L169   ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2020-09-24 17:14:54,604 INFO  L251      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2020-09-24 17:14:54,649 INFO  L375      AbstractCegarLoop]: Interprodecural is true
[2020-09-24 17:14:54,650 INFO  L376      AbstractCegarLoop]: Hoare is true
[2020-09-24 17:14:54,650 INFO  L377      AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation
[2020-09-24 17:14:54,650 INFO  L378      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2020-09-24 17:14:54,650 INFO  L379      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2020-09-24 17:14:54,650 INFO  L380      AbstractCegarLoop]: Difference is false
[2020-09-24 17:14:54,651 INFO  L381      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2020-09-24 17:14:54,651 INFO  L385      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2020-09-24 17:14:54,691 INFO  L276                IsEmpty]: Start isEmpty. Operand 456 states.
[2020-09-24 17:14:54,704 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 44
[2020-09-24 17:14:54,704 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-24 17:14:54,705 INFO  L422         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-24 17:14:54,706 INFO  L427      AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 17:14:54,713 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 17:14:54,714 INFO  L82        PathProgramCache]: Analyzing trace with hash -200720489, now seen corresponding path program 1 times
[2020-09-24 17:14:54,723 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 17:14:54,724 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [390287377]
[2020-09-24 17:14:54,724 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 17:14:54,883 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 17:14:54,951 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:14:55,155 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:14:55,302 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:14:56,022 FATAL L256   erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set)
[2020-09-24 17:14:56,023 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 52
[2020-09-24 17:14:56,023 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 3
[2020-09-24 17:14:56,023 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 1132
[2020-09-24 17:14:56,025 FATAL L256   erpolLogProxyWrapper]: Heuristic: RANDOM
[2020-09-24 17:14:56,025 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 6
[2020-09-24 17:14:56,025 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 12
[2020-09-24 17:14:56,025 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 39
[2020-09-24 17:14:56,026 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 2
[2020-09-24 17:14:56,127 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-24 17:14:56,135 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 17:14:56,143 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:14:56,165 FATAL L256   erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set)
[2020-09-24 17:14:56,166 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 18
[2020-09-24 17:14:56,166 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 17:14:56,166 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 29
[2020-09-24 17:14:56,166 FATAL L256   erpolLogProxyWrapper]: Heuristic: RANDOM
[2020-09-24 17:14:56,167 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 2
[2020-09-24 17:14:56,167 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 17:14:56,167 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 8
[2020-09-24 17:14:56,167 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-24 17:14:56,189 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 17:14:56,191 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [390287377]
[2020-09-24 17:14:56,193 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-09-24 17:14:56,194 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-09-24 17:14:56,195 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166555526]
[2020-09-24 17:14:56,201 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-09-24 17:14:56,201 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-24 17:14:56,218 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-09-24 17:14:56,219 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-09-24 17:14:56,222 INFO  L87              Difference]: Start difference. First operand 456 states. Second operand 4 states.
[2020-09-24 17:14:58,289 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-24 17:14:58,289 INFO  L93              Difference]: Finished difference Result 1069 states and 1495 transitions.
[2020-09-24 17:14:58,290 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2020-09-24 17:14:58,292 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 43
[2020-09-24 17:14:58,293 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-24 17:14:58,316 INFO  L225             Difference]: With dead ends: 1069
[2020-09-24 17:14:58,316 INFO  L226             Difference]: Without dead ends: 555
[2020-09-24 17:14:58,328 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 17:14:58,352 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 555 states.
[2020-09-24 17:14:58,421 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 543.
[2020-09-24 17:14:58,423 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 543 states.
[2020-09-24 17:14:58,427 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 543 states to 543 states and 670 transitions.
[2020-09-24 17:14:58,429 INFO  L78                 Accepts]: Start accepts. Automaton has 543 states and 670 transitions. Word has length 43
[2020-09-24 17:14:58,430 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-09-24 17:14:58,430 INFO  L479      AbstractCegarLoop]: Abstraction has 543 states and 670 transitions.
[2020-09-24 17:14:58,430 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2020-09-24 17:14:58,430 INFO  L276                IsEmpty]: Start isEmpty. Operand 543 states and 670 transitions.
[2020-09-24 17:14:58,436 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 124
[2020-09-24 17:14:58,436 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-24 17:14:58,437 INFO  L422         BasicCegarLoop]: trace histogram [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]
[2020-09-24 17:14:58,437 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2020-09-24 17:14:58,438 INFO  L427      AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 17:14:58,438 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 17:14:58,438 INFO  L82        PathProgramCache]: Analyzing trace with hash -1041597203, now seen corresponding path program 1 times
[2020-09-24 17:14:58,438 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 17:14:58,439 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1684263684]
[2020-09-24 17:14:58,439 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 17:14:58,478 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 17:14:58,511 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:14:58,697 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:14:58,853 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:14:59,480 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:14:59,712 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:15:00,106 FATAL L256   erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set)
[2020-09-24 17:15:00,106 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 134
[2020-09-24 17:15:00,106 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 5
[2020-09-24 17:15:00,107 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 1624
[2020-09-24 17:15:00,107 FATAL L256   erpolLogProxyWrapper]: Heuristic: RANDOM
[2020-09-24 17:15:00,107 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 6
[2020-09-24 17:15:00,107 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 11
[2020-09-24 17:15:00,107 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 86
[2020-09-24 17:15:00,108 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-24 17:15:00,184 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-24 17:15:00,191 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 17:15:00,206 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:15:00,228 FATAL L256   erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set)
[2020-09-24 17:15:00,228 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 18
[2020-09-24 17:15:00,229 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 17:15:00,229 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 36
[2020-09-24 17:15:00,230 FATAL L256   erpolLogProxyWrapper]: Heuristic: RANDOM
[2020-09-24 17:15:00,235 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 2
[2020-09-24 17:15:00,235 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 17:15:00,236 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 7
[2020-09-24 17:15:00,236 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 6
[2020-09-24 17:15:00,262 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21
[2020-09-24 17:15:00,288 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 17:15:00,303 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:15:00,432 FATAL L256   erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set)
[2020-09-24 17:15:00,433 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 76
[2020-09-24 17:15:00,433 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 17:15:00,434 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 143
[2020-09-24 17:15:00,434 FATAL L256   erpolLogProxyWrapper]: Heuristic: RANDOM
[2020-09-24 17:15:00,435 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 4
[2020-09-24 17:15:00,443 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 1
[2020-09-24 17:15:00,444 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 75
[2020-09-24 17:15:00,444 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 9
[2020-09-24 17:15:00,578 INFO  L134       CoverageAnalysis]: Checked inductivity of 27 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-09-24 17:15:00,579 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1684263684]
[2020-09-24 17:15:00,579 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-09-24 17:15:00,580 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2020-09-24 17:15:00,580 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359570219]
[2020-09-24 17:15:00,583 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 7 states
[2020-09-24 17:15:00,583 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-24 17:15:00,584 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2020-09-24 17:15:00,584 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42
[2020-09-24 17:15:00,584 INFO  L87              Difference]: Start difference. First operand 543 states and 670 transitions. Second operand 7 states.
[2020-09-24 17:15:02,802 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-24 17:15:02,802 INFO  L93              Difference]: Finished difference Result 1258 states and 1571 transitions.
[2020-09-24 17:15:02,803 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. 
[2020-09-24 17:15:02,803 INFO  L78                 Accepts]: Start accepts. Automaton has 7 states. Word has length 123
[2020-09-24 17:15:02,804 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-24 17:15:02,808 INFO  L225             Difference]: With dead ends: 1258
[2020-09-24 17:15:02,809 INFO  L226             Difference]: Without dead ends: 730
[2020-09-24 17:15:02,812 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90
[2020-09-24 17:15:02,813 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 730 states.
[2020-09-24 17:15:02,845 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 730 to 699.
[2020-09-24 17:15:02,845 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 699 states.
[2020-09-24 17:15:02,848 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 699 states to 699 states and 855 transitions.
[2020-09-24 17:15:02,849 INFO  L78                 Accepts]: Start accepts. Automaton has 699 states and 855 transitions. Word has length 123
[2020-09-24 17:15:02,849 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-09-24 17:15:02,850 INFO  L479      AbstractCegarLoop]: Abstraction has 699 states and 855 transitions.
[2020-09-24 17:15:02,850 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 7 states.
[2020-09-24 17:15:02,850 INFO  L276                IsEmpty]: Start isEmpty. Operand 699 states and 855 transitions.
[2020-09-24 17:15:02,853 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 133
[2020-09-24 17:15:02,853 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-24 17:15:02,854 INFO  L422         BasicCegarLoop]: trace histogram [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]
[2020-09-24 17:15:02,854 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2020-09-24 17:15:02,854 INFO  L427      AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 17:15:02,854 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 17:15:02,855 INFO  L82        PathProgramCache]: Analyzing trace with hash -203251606, now seen corresponding path program 1 times
[2020-09-24 17:15:02,855 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 17:15:02,855 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [920656959]
[2020-09-24 17:15:02,855 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 17:15:02,903 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 17:15:02,944 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:15:03,271 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:15:03,395 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:15:03,845 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:15:05,665 FATAL L256   erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set)
[2020-09-24 17:15:05,666 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 143
[2020-09-24 17:15:05,666 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 4
[2020-09-24 17:15:05,666 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 2760
[2020-09-24 17:15:05,667 FATAL L256   erpolLogProxyWrapper]: Heuristic: RANDOM
[2020-09-24 17:15:05,667 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 13
[2020-09-24 17:15:05,667 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 11
[2020-09-24 17:15:05,668 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 128
[2020-09-24 17:15:05,668 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-24 17:15:05,790 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-24 17:15:05,794 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 17:15:05,798 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:15:05,826 FATAL L256   erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set)
[2020-09-24 17:15:05,826 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 18
[2020-09-24 17:15:05,827 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 17:15:05,827 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 31
[2020-09-24 17:15:05,827 FATAL L256   erpolLogProxyWrapper]: Heuristic: RANDOM
[2020-09-24 17:15:05,827 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 4
[2020-09-24 17:15:05,828 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 17:15:05,828 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 11
[2020-09-24 17:15:05,828 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-24 17:15:05,867 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21
[2020-09-24 17:15:05,888 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 17:15:05,910 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:15:06,143 FATAL L256   erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set)
[2020-09-24 17:15:06,143 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 85
[2020-09-24 17:15:06,143 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 17:15:06,144 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 254
[2020-09-24 17:15:06,144 FATAL L256   erpolLogProxyWrapper]: Heuristic: RANDOM
[2020-09-24 17:15:06,144 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 7
[2020-09-24 17:15:06,144 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 1
[2020-09-24 17:15:06,144 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 84
[2020-09-24 17:15:06,145 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-24 17:15:06,308 INFO  L134       CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-09-24 17:15:06,309 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [920656959]
[2020-09-24 17:15:06,309 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-09-24 17:15:06,309 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12
[2020-09-24 17:15:06,309 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769536103]
[2020-09-24 17:15:06,311 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 12 states
[2020-09-24 17:15:06,311 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-24 17:15:06,312 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants.
[2020-09-24 17:15:06,313 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132
[2020-09-24 17:15:06,313 INFO  L87              Difference]: Start difference. First operand 699 states and 855 transitions. Second operand 12 states.
[2020-09-24 17:15:09,639 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-24 17:15:09,639 INFO  L93              Difference]: Finished difference Result 1440 states and 1874 transitions.
[2020-09-24 17:15:09,640 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. 
[2020-09-24 17:15:09,640 INFO  L78                 Accepts]: Start accepts. Automaton has 12 states. Word has length 132
[2020-09-24 17:15:09,643 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-24 17:15:09,655 INFO  L225             Difference]: With dead ends: 1440
[2020-09-24 17:15:09,656 INFO  L226             Difference]: Without dead ends: 873
[2020-09-24 17:15:09,659 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306
[2020-09-24 17:15:09,661 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 873 states.
[2020-09-24 17:15:09,732 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 873 to 736.
[2020-09-24 17:15:09,732 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 736 states.
[2020-09-24 17:15:09,737 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 736 states to 736 states and 892 transitions.
[2020-09-24 17:15:09,738 INFO  L78                 Accepts]: Start accepts. Automaton has 736 states and 892 transitions. Word has length 132
[2020-09-24 17:15:09,739 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-09-24 17:15:09,739 INFO  L479      AbstractCegarLoop]: Abstraction has 736 states and 892 transitions.
[2020-09-24 17:15:09,739 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 12 states.
[2020-09-24 17:15:09,739 INFO  L276                IsEmpty]: Start isEmpty. Operand 736 states and 892 transitions.
[2020-09-24 17:15:09,753 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 135
[2020-09-24 17:15:09,753 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-24 17:15:09,754 INFO  L422         BasicCegarLoop]: trace histogram [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]
[2020-09-24 17:15:09,754 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2020-09-24 17:15:09,754 INFO  L427      AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 17:15:09,754 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 17:15:09,755 INFO  L82        PathProgramCache]: Analyzing trace with hash -1058703710, now seen corresponding path program 1 times
[2020-09-24 17:15:09,755 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 17:15:09,756 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1054511093]
[2020-09-24 17:15:09,759 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 17:15:09,788 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 17:15:09,814 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:15:10,045 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:15:10,097 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:15:10,156 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:15:11,255 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:15:12,833 FATAL L256   erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set)
[2020-09-24 17:15:12,834 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 145
[2020-09-24 17:15:12,834 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 5
[2020-09-24 17:15:12,834 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 3042
[2020-09-24 17:15:12,834 FATAL L256   erpolLogProxyWrapper]: Heuristic: RANDOM
[2020-09-24 17:15:12,834 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 5
[2020-09-24 17:15:12,836 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 105
[2020-09-24 17:15:12,836 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 39
[2020-09-24 17:15:12,836 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-24 17:15:12,905 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-24 17:15:12,907 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 17:15:12,909 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:15:12,918 FATAL L256   erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set)
[2020-09-24 17:15:12,918 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 18
[2020-09-24 17:15:12,918 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 17:15:12,919 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 10
[2020-09-24 17:15:12,919 FATAL L256   erpolLogProxyWrapper]: Heuristic: RANDOM
[2020-09-24 17:15:12,919 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-24 17:15:12,919 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 17:15:12,919 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-24 17:15:12,920 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-24 17:15:12,936 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21
[2020-09-24 17:15:12,952 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 17:15:12,967 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:15:13,085 FATAL L256   erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set)
[2020-09-24 17:15:13,085 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 87
[2020-09-24 17:15:13,085 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 17:15:13,085 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 132
[2020-09-24 17:15:13,086 FATAL L256   erpolLogProxyWrapper]: Heuristic: RANDOM
[2020-09-24 17:15:13,086 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 3
[2020-09-24 17:15:13,086 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 17:15:13,086 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 77
[2020-09-24 17:15:13,087 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-24 17:15:13,143 INFO  L134       CoverageAnalysis]: Checked inductivity of 27 backedges. 26 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-09-24 17:15:13,145 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1054511093]
[2020-09-24 17:15:13,145 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-09-24 17:15:13,145 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6
[2020-09-24 17:15:13,146 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576603187]
[2020-09-24 17:15:13,147 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 6 states
[2020-09-24 17:15:13,148 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-24 17:15:13,148 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2020-09-24 17:15:13,149 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30
[2020-09-24 17:15:13,149 INFO  L87              Difference]: Start difference. First operand 736 states and 892 transitions. Second operand 6 states.
[2020-09-24 17:15:15,981 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-24 17:15:15,981 INFO  L93              Difference]: Finished difference Result 1940 states and 2535 transitions.
[2020-09-24 17:15:15,982 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. 
[2020-09-24 17:15:15,982 INFO  L78                 Accepts]: Start accepts. Automaton has 6 states. Word has length 134
[2020-09-24 17:15:15,982 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-24 17:15:15,988 INFO  L225             Difference]: With dead ends: 1940
[2020-09-24 17:15:15,988 INFO  L226             Difference]: Without dead ends: 1404
[2020-09-24 17:15:15,990 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 17:15:15,992 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 1404 states.
[2020-09-24 17:15:16,039 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 1404 to 1355.
[2020-09-24 17:15:16,039 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 1355 states.
[2020-09-24 17:15:16,047 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 1355 states to 1355 states and 1705 transitions.
[2020-09-24 17:15:16,048 INFO  L78                 Accepts]: Start accepts. Automaton has 1355 states and 1705 transitions. Word has length 134
[2020-09-24 17:15:16,049 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-09-24 17:15:16,049 INFO  L479      AbstractCegarLoop]: Abstraction has 1355 states and 1705 transitions.
[2020-09-24 17:15:16,049 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 6 states.
[2020-09-24 17:15:16,049 INFO  L276                IsEmpty]: Start isEmpty. Operand 1355 states and 1705 transitions.
[2020-09-24 17:15:16,054 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 166
[2020-09-24 17:15:16,054 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-24 17:15:16,055 INFO  L422         BasicCegarLoop]: trace histogram [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, 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 17:15:16,055 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3
[2020-09-24 17:15:16,055 INFO  L427      AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 17:15:16,055 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 17:15:16,056 INFO  L82        PathProgramCache]: Analyzing trace with hash -591181850, now seen corresponding path program 1 times
[2020-09-24 17:15:16,056 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 17:15:16,056 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [934355918]
[2020-09-24 17:15:16,056 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 17:15:16,097 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 17:15:16,134 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:15:16,397 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:15:16,520 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:15:16,701 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:15:16,812 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:15:19,377 FATAL L256   erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set)
[2020-09-24 17:15:19,378 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 176
[2020-09-24 17:15:19,378 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 5
[2020-09-24 17:15:19,378 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 3276
[2020-09-24 17:15:19,378 FATAL L256   erpolLogProxyWrapper]: Heuristic: RANDOM
[2020-09-24 17:15:19,378 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 4
[2020-09-24 17:15:19,378 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 139
[2020-09-24 17:15:19,379 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 36
[2020-09-24 17:15:19,379 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-24 17:15:19,453 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-24 17:15:19,454 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 17:15:19,458 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:15:19,466 FATAL L256   erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set)
[2020-09-24 17:15:19,467 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 18
[2020-09-24 17:15:19,467 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 17:15:19,467 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 10
[2020-09-24 17:15:19,468 FATAL L256   erpolLogProxyWrapper]: Heuristic: RANDOM
[2020-09-24 17:15:19,468 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-24 17:15:19,468 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 17:15:19,469 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-24 17:15:19,469 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-24 17:15:19,482 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21
[2020-09-24 17:15:19,507 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 17:15:19,530 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:15:19,645 FATAL L256   erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set)
[2020-09-24 17:15:19,646 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 118
[2020-09-24 17:15:19,646 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 17:15:19,646 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 138
[2020-09-24 17:15:19,646 FATAL L256   erpolLogProxyWrapper]: Heuristic: RANDOM
[2020-09-24 17:15:19,647 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 2
[2020-09-24 17:15:19,647 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 17:15:19,647 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 110
[2020-09-24 17:15:19,647 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-24 17:15:19,705 INFO  L134       CoverageAnalysis]: Checked inductivity of 27 backedges. 26 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-09-24 17:15:19,705 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [934355918]
[2020-09-24 17:15:19,706 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-09-24 17:15:19,706 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5
[2020-09-24 17:15:19,706 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823264293]
[2020-09-24 17:15:19,707 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 5 states
[2020-09-24 17:15:19,707 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-24 17:15:19,707 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2020-09-24 17:15:19,707 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20
[2020-09-24 17:15:19,708 INFO  L87              Difference]: Start difference. First operand 1355 states and 1705 transitions. Second operand 5 states.
[2020-09-24 17:15:21,241 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-24 17:15:21,245 INFO  L93              Difference]: Finished difference Result 2816 states and 3660 transitions.
[2020-09-24 17:15:21,246 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2020-09-24 17:15:21,246 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 165
[2020-09-24 17:15:21,247 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-24 17:15:21,256 INFO  L225             Difference]: With dead ends: 2816
[2020-09-24 17:15:21,256 INFO  L226             Difference]: Without dead ends: 1315
[2020-09-24 17:15:21,261 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 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 17:15:21,265 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 1315 states.
[2020-09-24 17:15:21,306 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 1315 to 1315.
[2020-09-24 17:15:21,306 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 1315 states.
[2020-09-24 17:15:21,312 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 1315 states to 1315 states and 1625 transitions.
[2020-09-24 17:15:21,312 INFO  L78                 Accepts]: Start accepts. Automaton has 1315 states and 1625 transitions. Word has length 165
[2020-09-24 17:15:21,313 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-09-24 17:15:21,313 INFO  L479      AbstractCegarLoop]: Abstraction has 1315 states and 1625 transitions.
[2020-09-24 17:15:21,313 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2020-09-24 17:15:21,313 INFO  L276                IsEmpty]: Start isEmpty. Operand 1315 states and 1625 transitions.
[2020-09-24 17:15:21,317 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 207
[2020-09-24 17:15:21,317 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-24 17:15:21,318 INFO  L422         BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 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 17:15:21,318 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4
[2020-09-24 17:15:21,318 INFO  L427      AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 17:15:21,318 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 17:15:21,319 INFO  L82        PathProgramCache]: Analyzing trace with hash -708481072, now seen corresponding path program 1 times
[2020-09-24 17:15:21,319 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 17:15:21,319 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [596889]
[2020-09-24 17:15:21,319 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 17:15:21,345 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 17:15:21,373 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:15:21,444 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:15:22,481 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:15:22,834 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:15:26,520 FATAL L256   erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set)
[2020-09-24 17:15:26,520 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 219
[2020-09-24 17:15:26,520 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 4
[2020-09-24 17:15:26,521 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 5171
[2020-09-24 17:15:26,521 FATAL L256   erpolLogProxyWrapper]: Heuristic: RANDOM
[2020-09-24 17:15:26,521 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 6
[2020-09-24 17:15:26,521 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 100
[2020-09-24 17:15:26,522 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 118
[2020-09-24 17:15:26,522 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-24 17:15:26,591 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-24 17:15:26,593 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 17:15:26,595 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:15:26,602 FATAL L256   erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set)
[2020-09-24 17:15:26,603 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 18
[2020-09-24 17:15:26,603 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 17:15:26,603 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 8
[2020-09-24 17:15:26,603 FATAL L256   erpolLogProxyWrapper]: Heuristic: RANDOM
[2020-09-24 17:15:26,603 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-24 17:15:26,604 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 17:15:26,604 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-24 17:15:26,604 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-24 17:15:26,617 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21
[2020-09-24 17:15:26,631 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 17:15:26,647 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:15:26,725 FATAL L256   erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set)
[2020-09-24 17:15:26,725 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 79
[2020-09-24 17:15:26,725 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 17:15:26,726 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 93
[2020-09-24 17:15:26,726 FATAL L256   erpolLogProxyWrapper]: Heuristic: RANDOM
[2020-09-24 17:15:26,726 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 2
[2020-09-24 17:15:26,727 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 17:15:26,727 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 71
[2020-09-24 17:15:26,727 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-24 17:15:26,792 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104
[2020-09-24 17:15:26,804 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 17:15:26,819 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:15:26,891 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:15:26,920 FATAL L256   erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set)
[2020-09-24 17:15:26,921 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 76
[2020-09-24 17:15:26,921 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 2
[2020-09-24 17:15:26,922 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 115
[2020-09-24 17:15:26,922 FATAL L256   erpolLogProxyWrapper]: Heuristic: RANDOM
[2020-09-24 17:15:26,922 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 4
[2020-09-24 17:15:26,923 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 1
[2020-09-24 17:15:26,923 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 75
[2020-09-24 17:15:26,923 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-24 17:15:27,046 INFO  L134       CoverageAnalysis]: Checked inductivity of 132 backedges. 98 proven. 23 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked.
[2020-09-24 17:15:27,046 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [596889]
[2020-09-24 17:15:27,047 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-09-24 17:15:27,047 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6
[2020-09-24 17:15:27,047 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315922890]
[2020-09-24 17:15:27,048 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 6 states
[2020-09-24 17:15:27,048 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-24 17:15:27,049 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2020-09-24 17:15:27,049 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30
[2020-09-24 17:15:27,049 INFO  L87              Difference]: Start difference. First operand 1315 states and 1625 transitions. Second operand 6 states.
[2020-09-24 17:15:28,618 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-24 17:15:28,618 INFO  L93              Difference]: Finished difference Result 2940 states and 3738 transitions.
[2020-09-24 17:15:28,624 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. 
[2020-09-24 17:15:28,624 INFO  L78                 Accepts]: Start accepts. Automaton has 6 states. Word has length 206
[2020-09-24 17:15:28,625 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-24 17:15:28,634 INFO  L225             Difference]: With dead ends: 2940
[2020-09-24 17:15:28,634 INFO  L226             Difference]: Without dead ends: 1798
[2020-09-24 17:15:28,639 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 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 17:15:28,641 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 1798 states.
[2020-09-24 17:15:28,683 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 1798 to 1766.
[2020-09-24 17:15:28,684 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 1766 states.
[2020-09-24 17:15:28,693 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 1766 states to 1766 states and 2127 transitions.
[2020-09-24 17:15:28,693 INFO  L78                 Accepts]: Start accepts. Automaton has 1766 states and 2127 transitions. Word has length 206
[2020-09-24 17:15:28,693 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-09-24 17:15:28,694 INFO  L479      AbstractCegarLoop]: Abstraction has 1766 states and 2127 transitions.
[2020-09-24 17:15:28,694 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 6 states.
[2020-09-24 17:15:28,694 INFO  L276                IsEmpty]: Start isEmpty. Operand 1766 states and 2127 transitions.
[2020-09-24 17:15:28,698 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 248
[2020-09-24 17:15:28,699 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-24 17:15:28,699 INFO  L422         BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:15:28,699 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5
[2020-09-24 17:15:28,699 INFO  L427      AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 17:15:28,700 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 17:15:28,700 INFO  L82        PathProgramCache]: Analyzing trace with hash -12142129, now seen corresponding path program 1 times
[2020-09-24 17:15:28,700 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 17:15:28,700 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [639300056]
[2020-09-24 17:15:28,701 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 17:15:28,765 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 17:15:28,816 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:15:29,255 FATAL L256   erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set)
[2020-09-24 17:15:29,256 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 260
[2020-09-24 17:15:29,256 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 17:15:29,256 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 487
[2020-09-24 17:15:29,256 FATAL L256   erpolLogProxyWrapper]: Heuristic: RANDOM
[2020-09-24 17:15:29,257 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 4
[2020-09-24 17:15:29,257 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 223
[2020-09-24 17:15:29,257 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 36
[2020-09-24 17:15:29,258 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-24 17:15:29,355 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-24 17:15:29,356 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 17:15:29,359 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:15:29,362 FATAL L256   erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set)
[2020-09-24 17:15:29,363 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 18
[2020-09-24 17:15:29,363 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 17:15:29,364 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 5
[2020-09-24 17:15:29,364 FATAL L256   erpolLogProxyWrapper]: Heuristic: RANDOM
[2020-09-24 17:15:29,364 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-24 17:15:29,364 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 17:15:29,365 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-24 17:15:29,365 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-24 17:15:29,381 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21
[2020-09-24 17:15:29,390 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 17:15:29,397 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:15:29,431 FATAL L256   erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set)
[2020-09-24 17:15:29,431 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 120
[2020-09-24 17:15:29,432 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 17:15:29,432 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 40
[2020-09-24 17:15:29,432 FATAL L256   erpolLogProxyWrapper]: Heuristic: RANDOM
[2020-09-24 17:15:29,433 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-24 17:15:29,433 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 17:15:29,433 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-24 17:15:29,434 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-24 17:15:29,487 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145
[2020-09-24 17:15:29,502 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 17:15:29,561 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:15:29,598 FATAL L256   erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set)
[2020-09-24 17:15:29,599 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 76
[2020-09-24 17:15:29,599 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 17:15:29,599 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 95
[2020-09-24 17:15:29,599 FATAL L256   erpolLogProxyWrapper]: Heuristic: RANDOM
[2020-09-24 17:15:29,600 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 2
[2020-09-24 17:15:29,600 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 17:15:29,600 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 68
[2020-09-24 17:15:29,600 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-24 17:15:29,673 INFO  L134       CoverageAnalysis]: Checked inductivity of 132 backedges. 57 proven. 2 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked.
[2020-09-24 17:15:29,673 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [639300056]
[2020-09-24 17:15:29,673 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-09-24 17:15:29,674 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5
[2020-09-24 17:15:29,674 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956594662]
[2020-09-24 17:15:29,675 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 5 states
[2020-09-24 17:15:29,675 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-24 17:15:29,675 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2020-09-24 17:15:29,675 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20
[2020-09-24 17:15:29,675 INFO  L87              Difference]: Start difference. First operand 1766 states and 2127 transitions. Second operand 5 states.
[2020-09-24 17:15:31,451 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-24 17:15:31,451 INFO  L93              Difference]: Finished difference Result 3807 states and 4722 transitions.
[2020-09-24 17:15:31,452 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2020-09-24 17:15:31,452 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 247
[2020-09-24 17:15:31,452 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-24 17:15:31,463 INFO  L225             Difference]: With dead ends: 3807
[2020-09-24 17:15:31,464 INFO  L226             Difference]: Without dead ends: 2220
[2020-09-24 17:15:31,469 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 17:15:31,472 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 2220 states.
[2020-09-24 17:15:31,519 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 2220 to 1918.
[2020-09-24 17:15:31,520 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 1918 states.
[2020-09-24 17:15:31,528 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 1918 states to 1918 states and 2300 transitions.
[2020-09-24 17:15:31,528 INFO  L78                 Accepts]: Start accepts. Automaton has 1918 states and 2300 transitions. Word has length 247
[2020-09-24 17:15:31,529 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-09-24 17:15:31,529 INFO  L479      AbstractCegarLoop]: Abstraction has 1918 states and 2300 transitions.
[2020-09-24 17:15:31,529 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2020-09-24 17:15:31,530 INFO  L276                IsEmpty]: Start isEmpty. Operand 1918 states and 2300 transitions.
[2020-09-24 17:15:31,541 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 346
[2020-09-24 17:15:31,542 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-24 17:15:31,542 INFO  L422         BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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]
[2020-09-24 17:15:31,542 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6
[2020-09-24 17:15:31,543 INFO  L427      AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 17:15:31,543 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 17:15:31,543 INFO  L82        PathProgramCache]: Analyzing trace with hash 1251019352, now seen corresponding path program 1 times
[2020-09-24 17:15:31,543 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 17:15:31,544 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [112288294]
[2020-09-24 17:15:31,544 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 17:15:31,596 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 17:15:31,652 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:15:31,820 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:15:31,963 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:15:33,712 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:15:34,235 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:15:34,378 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:15:38,156 FATAL L256   erpolLogProxyWrapper]: Now shrinking...