/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/Problem14_label30.c


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


This is Ultimate 0.1.25-c90d42b
[2020-09-24 17:16:59,971 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2020-09-24 17:16:59,976 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2020-09-24 17:17:00,026 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2020-09-24 17:17:00,028 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2020-09-24 17:17:00,036 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2020-09-24 17:17:00,039 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2020-09-24 17:17:00,045 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2020-09-24 17:17:00,048 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2020-09-24 17:17:00,054 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
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[2020-09-24 17:17:00,057 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2020-09-24 17:17:00,060 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2020-09-24 17:17:00,063 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2020-09-24 17:17:00,065 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2020-09-24 17:17:00,066 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2020-09-24 17:17:00,068 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2020-09-24 17:17:00,069 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2020-09-24 17:17:00,078 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2020-09-24 17:17:00,080 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2020-09-24 17:17:00,081 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2020-09-24 17:17:00,082 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2020-09-24 17:17:00,083 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2020-09-24 17:17:00,101 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2020-09-24 17:17:00,101 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2020-09-24 17:17:00,101 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2020-09-24 17:17:00,102 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2020-09-24 17:17:00,106 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2020-09-24 17:17:00,107 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2020-09-24 17:17:00,108 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2020-09-24 17:17:00,109 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2020-09-24 17:17:00,112 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2020-09-24 17:17:00,113 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2020-09-24 17:17:00,114 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2020-09-24 17:17:00,115 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
[2020-09-24 17:17:00,116 INFO  L184        SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
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[2020-09-24 17:17:00,116 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
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[2020-09-24 17:17:00,118 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2020-09-24 17:17:00,120 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 17:17:00,165 INFO  L113        SettingsManager]: Loading preferences was successful
[2020-09-24 17:17:00,166 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2020-09-24 17:17:00,167 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2020-09-24 17:17:00,167 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2020-09-24 17:17:00,168 INFO  L138        SettingsManager]:  * Use SBE=true
[2020-09-24 17:17:00,168 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2020-09-24 17:17:00,168 INFO  L138        SettingsManager]:  * sizeof long=4
[2020-09-24 17:17:00,168 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2020-09-24 17:17:00,169 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2020-09-24 17:17:00,169 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2020-09-24 17:17:00,169 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2020-09-24 17:17:00,169 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2020-09-24 17:17:00,169 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2020-09-24 17:17:00,170 INFO  L138        SettingsManager]:  * sizeof long double=12
[2020-09-24 17:17:00,170 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2020-09-24 17:17:00,170 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2020-09-24 17:17:00,170 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2020-09-24 17:17:00,171 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2020-09-24 17:17:00,171 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2020-09-24 17:17:00,171 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2020-09-24 17:17:00,171 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2020-09-24 17:17:00,171 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-09-24 17:17:00,172 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2020-09-24 17:17:00,172 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2020-09-24 17:17:00,172 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2020-09-24 17:17:00,172 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2020-09-24 17:17:00,172 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-09-24 17:17:00,173 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2020-09-24 17:17:00,173 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2020-09-24 17:17:00,173 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 17:17:00,627 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2020-09-24 17:17:00,655 INFO  L258   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2020-09-24 17:17:00,660 INFO  L214   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2020-09-24 17:17:00,662 INFO  L271        PluginConnector]: Initializing CDTParser...
[2020-09-24 17:17:00,662 INFO  L275        PluginConnector]: CDTParser initialized
[2020-09-24 17:17:00,664 INFO  L429   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label30.c
[2020-09-24 17:17:00,759 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/04804a32b/75e4008c51ec439b9043e34987f7deb9/FLAG22a244322
[2020-09-24 17:17:01,451 INFO  L306              CDTParser]: Found 1 translation units.
[2020-09-24 17:17:01,453 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem14_label30.c
[2020-09-24 17:17:01,478 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/04804a32b/75e4008c51ec439b9043e34987f7deb9/FLAG22a244322
[2020-09-24 17:17:01,631 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/04804a32b/75e4008c51ec439b9043e34987f7deb9
[2020-09-24 17:17:01,647 INFO  L296   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2020-09-24 17:17:01,654 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2020-09-24 17:17:01,655 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2020-09-24 17:17:01,655 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2020-09-24 17:17:01,660 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2020-09-24 17:17:01,662 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 05:17:01" (1/1) ...
[2020-09-24 17:17:01,666 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@39c1a6e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:17:01, skipping insertion in model container
[2020-09-24 17:17:01,667 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 05:17:01" (1/1) ...
[2020-09-24 17:17:01,677 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2020-09-24 17:17:01,741 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2020-09-24 17:17:02,266 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-09-24 17:17:02,273 INFO  L203         MainTranslator]: Completed pre-run
[2020-09-24 17:17:02,631 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-09-24 17:17:02,657 INFO  L208         MainTranslator]: Completed translation
[2020-09-24 17:17:02,658 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:17:02 WrapperNode
[2020-09-24 17:17:02,658 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2020-09-24 17:17:02,659 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2020-09-24 17:17:02,660 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2020-09-24 17:17:02,660 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2020-09-24 17:17:02,684 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:17:02" (1/1) ...
[2020-09-24 17:17:02,685 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:17:02" (1/1) ...
[2020-09-24 17:17:02,709 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:17:02" (1/1) ...
[2020-09-24 17:17:02,710 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:17:02" (1/1) ...
[2020-09-24 17:17:02,794 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:17:02" (1/1) ...
[2020-09-24 17:17:02,828 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:17:02" (1/1) ...
[2020-09-24 17:17:02,849 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:17:02" (1/1) ...
[2020-09-24 17:17:02,869 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2020-09-24 17:17:02,869 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2020-09-24 17:17:02,869 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2020-09-24 17:17:02,870 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2020-09-24 17:17:02,872 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:17:02" (1/1) ...
No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-09-24 17:17:02,980 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2020-09-24 17:17:02,980 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2020-09-24 17:17:02,980 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output
[2020-09-24 17:17:02,980 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2020-09-24 17:17:02,981 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output
[2020-09-24 17:17:02,981 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2020-09-24 17:17:02,981 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int
[2020-09-24 17:17:02,982 INFO  L130     BoogieDeclarations]: Found specification of procedure exit
[2020-09-24 17:17:02,982 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2020-09-24 17:17:02,982 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2020-09-24 17:17:02,982 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2020-09-24 17:17:04,900 INFO  L290             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2020-09-24 17:17:04,901 INFO  L295             CfgBuilder]: Removed 1 assume(true) statements.
[2020-09-24 17:17:04,911 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 05:17:04 BoogieIcfgContainer
[2020-09-24 17:17:04,911 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2020-09-24 17:17:04,912 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2020-09-24 17:17:04,912 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2020-09-24 17:17:04,916 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2020-09-24 17:17:04,917 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 05:17:01" (1/3) ...
[2020-09-24 17:17:04,918 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f6217c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 05:17:04, skipping insertion in model container
[2020-09-24 17:17:04,918 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:17:02" (2/3) ...
[2020-09-24 17:17:04,919 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f6217c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 05:17:04, skipping insertion in model container
[2020-09-24 17:17:04,919 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 05:17:04" (3/3) ...
[2020-09-24 17:17:04,922 INFO  L109   eAbstractionObserver]: Analyzing ICFG Problem14_label30.c
[2020-09-24 17:17:04,934 INFO  L157   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION
[2020-09-24 17:17:04,946 INFO  L169   ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2020-09-24 17:17:04,966 INFO  L251      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2020-09-24 17:17:05,003 INFO  L375      AbstractCegarLoop]: Interprodecural is true
[2020-09-24 17:17:05,003 INFO  L376      AbstractCegarLoop]: Hoare is true
[2020-09-24 17:17:05,003 INFO  L377      AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation
[2020-09-24 17:17:05,004 INFO  L378      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2020-09-24 17:17:05,004 INFO  L379      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2020-09-24 17:17:05,004 INFO  L380      AbstractCegarLoop]: Difference is false
[2020-09-24 17:17:05,004 INFO  L381      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2020-09-24 17:17:05,004 INFO  L385      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2020-09-24 17:17:05,041 INFO  L276                IsEmpty]: Start isEmpty. Operand 678 states.
[2020-09-24 17:17:05,053 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 63
[2020-09-24 17:17:05,053 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-24 17:17:05,055 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-24 17:17:05,055 INFO  L427      AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 17:17:05,064 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 17:17:05,064 INFO  L82        PathProgramCache]: Analyzing trace with hash 2082104676, now seen corresponding path program 1 times
[2020-09-24 17:17:05,076 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 17:17:05,077 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [697536871]
[2020-09-24 17:17:05,077 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 17:17:05,268 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 17:17:05,379 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:17:05,723 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:17:06,106 FATAL L256   erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set)
[2020-09-24 17:17:06,106 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 71
[2020-09-24 17:17:06,106 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 2
[2020-09-24 17:17:06,107 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 823
[2020-09-24 17:17:06,108 FATAL L256   erpolLogProxyWrapper]: Heuristic: RANDOM
[2020-09-24 17:17:06,108 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 6
[2020-09-24 17:17:06,109 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 13
[2020-09-24 17:17:06,109 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 57
[2020-09-24 17:17:06,110 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 2
[2020-09-24 17:17:06,261 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-24 17:17:06,272 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 17:17:06,278 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:17:06,295 FATAL L256   erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set)
[2020-09-24 17:17:06,295 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 18
[2020-09-24 17:17:06,295 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 17:17:06,296 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 22
[2020-09-24 17:17:06,296 FATAL L256   erpolLogProxyWrapper]: Heuristic: RANDOM
[2020-09-24 17:17:06,296 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 2
[2020-09-24 17:17:06,296 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 17:17:06,297 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 9
[2020-09-24 17:17:06,297 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-24 17:17:06,320 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 17:17:06,322 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [697536871]
[2020-09-24 17:17:06,325 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-09-24 17:17:06,326 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-09-24 17:17:06,327 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498431515]
[2020-09-24 17:17:06,335 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-09-24 17:17:06,336 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-24 17:17:06,355 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-09-24 17:17:06,356 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-09-24 17:17:06,359 INFO  L87              Difference]: Start difference. First operand 678 states. Second operand 4 states.
[2020-09-24 17:17:09,271 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-24 17:17:09,272 INFO  L93              Difference]: Finished difference Result 1564 states and 2106 transitions.
[2020-09-24 17:17:09,272 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2020-09-24 17:17:09,274 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 62
[2020-09-24 17:17:09,275 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-24 17:17:09,313 INFO  L225             Difference]: With dead ends: 1564
[2020-09-24 17:17:09,313 INFO  L226             Difference]: Without dead ends: 828
[2020-09-24 17:17:09,326 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 17:17:09,348 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 828 states.
[2020-09-24 17:17:09,433 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 828 to 806.
[2020-09-24 17:17:09,435 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 806 states.
[2020-09-24 17:17:09,441 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 806 states to 806 states and 982 transitions.
[2020-09-24 17:17:09,443 INFO  L78                 Accepts]: Start accepts. Automaton has 806 states and 982 transitions. Word has length 62
[2020-09-24 17:17:09,444 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-09-24 17:17:09,444 INFO  L479      AbstractCegarLoop]: Abstraction has 806 states and 982 transitions.
[2020-09-24 17:17:09,444 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2020-09-24 17:17:09,444 INFO  L276                IsEmpty]: Start isEmpty. Operand 806 states and 982 transitions.
[2020-09-24 17:17:09,453 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 142
[2020-09-24 17:17:09,453 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-24 17:17:09,453 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, 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]
[2020-09-24 17:17:09,454 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2020-09-24 17:17:09,454 INFO  L427      AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 17:17:09,454 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 17:17:09,455 INFO  L82        PathProgramCache]: Analyzing trace with hash 824518871, now seen corresponding path program 1 times
[2020-09-24 17:17:09,457 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 17:17:09,457 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1304388565]
[2020-09-24 17:17:09,457 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 17:17:09,528 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 17:17:09,562 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:17:09,793 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:17:09,903 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:17:09,962 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:17:10,044 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:17:11,235 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:17:12,051 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:17:14,503 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:17:14,738 FATAL L256   erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set)
[2020-09-24 17:17:14,738 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 152
[2020-09-24 17:17:14,738 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 8
[2020-09-24 17:17:14,739 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 5206
[2020-09-24 17:17:14,740 FATAL L256   erpolLogProxyWrapper]: Heuristic: RANDOM
[2020-09-24 17:17:14,740 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 12
[2020-09-24 17:17:14,740 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 14
[2020-09-24 17:17:14,741 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 125
[2020-09-24 17:17:14,741 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-24 17:17:14,906 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-24 17:17:14,915 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 17:17:14,920 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:17:14,955 FATAL L256   erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set)
[2020-09-24 17:17:14,956 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 18
[2020-09-24 17:17:14,957 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 17:17:14,961 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 39
[2020-09-24 17:17:14,961 FATAL L256   erpolLogProxyWrapper]: Heuristic: RANDOM
[2020-09-24 17:17:14,962 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 3
[2020-09-24 17:17:14,962 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 17:17:14,962 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 11
[2020-09-24 17:17:14,962 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-24 17:17:14,994 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21
[2020-09-24 17:17:15,015 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 17:17:15,032 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:17:15,153 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:17:15,530 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:17:15,700 FATAL L256   erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set)
[2020-09-24 17:17:15,700 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 75
[2020-09-24 17:17:15,709 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 3
[2020-09-24 17:17:15,709 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 683
[2020-09-24 17:17:15,709 FATAL L256   erpolLogProxyWrapper]: Heuristic: RANDOM
[2020-09-24 17:17:15,710 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 5
[2020-09-24 17:17:15,710 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 17:17:15,710 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 67
[2020-09-24 17:17:15,710 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-24 17:17:15,883 INFO  L134       CoverageAnalysis]: Checked inductivity of 46 backedges. 38 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-09-24 17:17:15,884 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1304388565]
[2020-09-24 17:17:15,884 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-09-24 17:17:15,885 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11
[2020-09-24 17:17:15,885 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607238535]
[2020-09-24 17:17:15,887 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 11 states
[2020-09-24 17:17:15,887 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-24 17:17:15,888 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants.
[2020-09-24 17:17:15,888 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110
[2020-09-24 17:17:15,888 INFO  L87              Difference]: Start difference. First operand 806 states and 982 transitions. Second operand 11 states.
[2020-09-24 17:17:23,745 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-24 17:17:23,745 INFO  L93              Difference]: Finished difference Result 2569 states and 3312 transitions.
[2020-09-24 17:17:23,746 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. 
[2020-09-24 17:17:23,746 INFO  L78                 Accepts]: Start accepts. Automaton has 11 states. Word has length 141
[2020-09-24 17:17:23,747 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-24 17:17:23,757 INFO  L225             Difference]: With dead ends: 2569
[2020-09-24 17:17:23,757 INFO  L226             Difference]: Without dead ends: 1707
[2020-09-24 17:17:23,763 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 6 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182
[2020-09-24 17:17:23,765 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 1707 states.
[2020-09-24 17:17:23,816 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 1707 to 1653.
[2020-09-24 17:17:23,816 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 1653 states.
[2020-09-24 17:17:23,825 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 1653 states to 1653 states and 2019 transitions.
[2020-09-24 17:17:23,825 INFO  L78                 Accepts]: Start accepts. Automaton has 1653 states and 2019 transitions. Word has length 141
[2020-09-24 17:17:23,826 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-09-24 17:17:23,826 INFO  L479      AbstractCegarLoop]: Abstraction has 1653 states and 2019 transitions.
[2020-09-24 17:17:23,826 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 11 states.
[2020-09-24 17:17:23,826 INFO  L276                IsEmpty]: Start isEmpty. Operand 1653 states and 2019 transitions.
[2020-09-24 17:17:23,832 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 146
[2020-09-24 17:17:23,832 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-24 17:17:23,832 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, 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]
[2020-09-24 17:17:23,833 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2020-09-24 17:17:23,833 INFO  L427      AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 17:17:23,833 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 17:17:23,833 INFO  L82        PathProgramCache]: Analyzing trace with hash 32310375, now seen corresponding path program 1 times
[2020-09-24 17:17:23,834 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 17:17:23,834 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1580519607]
[2020-09-24 17:17:23,834 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 17:17:23,861 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 17:17:23,887 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:17:23,997 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:17:24,083 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:17:24,651 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:17:24,732 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:17:28,431 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:17:30,334 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:17:31,614 FATAL L256   erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set)
[2020-09-24 17:17:31,615 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 156
[2020-09-24 17:17:31,615 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 7
[2020-09-24 17:17:31,615 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 7751
[2020-09-24 17:17:31,616 FATAL L256   erpolLogProxyWrapper]: Heuristic: RANDOM
[2020-09-24 17:17:31,616 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 4
[2020-09-24 17:17:31,616 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 100
[2020-09-24 17:17:31,617 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 55
[2020-09-24 17:17:31,617 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-24 17:17:31,713 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-24 17:17:31,715 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 17:17:31,717 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:17:31,727 FATAL L256   erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set)
[2020-09-24 17:17:31,728 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 18
[2020-09-24 17:17:31,728 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 17:17:31,729 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 12
[2020-09-24 17:17:31,729 FATAL L256   erpolLogProxyWrapper]: Heuristic: RANDOM
[2020-09-24 17:17:31,729 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-24 17:17:31,730 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 17:17:31,730 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-24 17:17:31,730 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-24 17:17:31,747 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21
[2020-09-24 17:17:31,759 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 17:17:31,773 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:17:31,838 FATAL L256   erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set)
[2020-09-24 17:17:31,839 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 79
[2020-09-24 17:17:31,839 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 17:17:31,839 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 78
[2020-09-24 17:17:31,839 FATAL L256   erpolLogProxyWrapper]: Heuristic: RANDOM
[2020-09-24 17:17:31,840 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 2
[2020-09-24 17:17:31,840 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 17:17:31,840 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 71
[2020-09-24 17:17:31,840 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-24 17:17:31,893 INFO  L134       CoverageAnalysis]: Checked inductivity of 46 backedges. 45 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-09-24 17:17:31,894 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1580519607]
[2020-09-24 17:17:31,894 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-09-24 17:17:31,894 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6
[2020-09-24 17:17:31,894 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203024338]
[2020-09-24 17:17:31,896 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 6 states
[2020-09-24 17:17:31,897 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-24 17:17:31,897 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2020-09-24 17:17:31,897 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30
[2020-09-24 17:17:31,897 INFO  L87              Difference]: Start difference. First operand 1653 states and 2019 transitions. Second operand 6 states.
[2020-09-24 17:17:35,941 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-24 17:17:35,941 INFO  L93              Difference]: Finished difference Result 4863 states and 6204 transitions.
[2020-09-24 17:17:35,943 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. 
[2020-09-24 17:17:35,943 INFO  L78                 Accepts]: Start accepts. Automaton has 6 states. Word has length 145
[2020-09-24 17:17:35,944 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-24 17:17:35,962 INFO  L225             Difference]: With dead ends: 4863
[2020-09-24 17:17:35,962 INFO  L226             Difference]: Without dead ends: 3225
[2020-09-24 17:17:35,969 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56
[2020-09-24 17:17:35,972 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 3225 states.
[2020-09-24 17:17:36,057 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 3225 to 2973.
[2020-09-24 17:17:36,058 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 2973 states.
[2020-09-24 17:17:36,071 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 2973 states to 2973 states and 3755 transitions.
[2020-09-24 17:17:36,071 INFO  L78                 Accepts]: Start accepts. Automaton has 2973 states and 3755 transitions. Word has length 145
[2020-09-24 17:17:36,073 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-09-24 17:17:36,073 INFO  L479      AbstractCegarLoop]: Abstraction has 2973 states and 3755 transitions.
[2020-09-24 17:17:36,073 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 6 states.
[2020-09-24 17:17:36,073 INFO  L276                IsEmpty]: Start isEmpty. Operand 2973 states and 3755 transitions.
[2020-09-24 17:17:36,087 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 275
[2020-09-24 17:17:36,088 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-24 17:17:36,093 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:17:36,093 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2020-09-24 17:17:36,093 INFO  L427      AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 17:17:36,093 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 17:17:36,094 INFO  L82        PathProgramCache]: Analyzing trace with hash -479057520, now seen corresponding path program 1 times
[2020-09-24 17:17:36,094 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 17:17:36,095 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [587818073]
[2020-09-24 17:17:36,095 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 17:17:36,124 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 17:17:36,156 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:17:36,273 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:17:36,419 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:17:37,094 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:17:38,671 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:17:39,124 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:17:39,904 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:17:40,256 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:17:47,411 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:17:47,793 FATAL L256   erpolLogProxyWrapper]: Now shrinking...