/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.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 SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/eca-rers2012/Problem13_label12.c


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


This is Ultimate 0.2.0-0f64333
[2020-10-26 23:05:45,255 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2020-10-26 23:05:45,260 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2020-10-26 23:05:45,328 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2020-10-26 23:05:45,329 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2020-10-26 23:05:45,337 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2020-10-26 23:05:45,340 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
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[2020-10-26 23:05:45,357 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
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[2020-10-26 23:05:45,362 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2020-10-26 23:05:45,366 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2020-10-26 23:05:45,368 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2020-10-26 23:05:45,371 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2020-10-26 23:05:45,372 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2020-10-26 23:05:45,376 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2020-10-26 23:05:45,385 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2020-10-26 23:05:45,395 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2020-10-26 23:05:45,398 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2020-10-26 23:05:45,400 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2020-10-26 23:05:45,402 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2020-10-26 23:05:45,403 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2020-10-26 23:05:45,406 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2020-10-26 23:05:45,407 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2020-10-26 23:05:45,407 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2020-10-26 23:05:45,420 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2020-10-26 23:05:45,421 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2020-10-26 23:05:45,425 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2020-10-26 23:05:45,426 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2020-10-26 23:05:45,426 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2020-10-26 23:05:45,429 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2020-10-26 23:05:45,430 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2020-10-26 23:05:45,432 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2020-10-26 23:05:45,432 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
[2020-10-26 23:05:45,433 INFO  L184        SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2020-10-26 23:05:45,433 INFO  L184        SettingsManager]: ReqParser provides no preferences, ignoring...
[2020-10-26 23:05:45,434 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
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[2020-10-26 23:05:45,436 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2020-10-26 23:05:45,444 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
[2020-10-26 23:05:45,505 INFO  L113        SettingsManager]: Loading preferences was successful
[2020-10-26 23:05:45,506 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2020-10-26 23:05:45,511 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2020-10-26 23:05:45,511 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2020-10-26 23:05:45,511 INFO  L138        SettingsManager]:  * Use SBE=true
[2020-10-26 23:05:45,512 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2020-10-26 23:05:45,512 INFO  L138        SettingsManager]:  * sizeof long=4
[2020-10-26 23:05:45,512 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2020-10-26 23:05:45,512 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2020-10-26 23:05:45,513 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2020-10-26 23:05:45,514 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2020-10-26 23:05:45,515 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2020-10-26 23:05:45,515 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2020-10-26 23:05:45,515 INFO  L138        SettingsManager]:  * sizeof long double=12
[2020-10-26 23:05:45,515 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2020-10-26 23:05:45,515 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2020-10-26 23:05:45,516 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2020-10-26 23:05:45,516 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2020-10-26 23:05:45,516 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2020-10-26 23:05:45,516 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2020-10-26 23:05:45,516 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2020-10-26 23:05:45,517 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-10-26 23:05:45,517 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2020-10-26 23:05:45,517 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2020-10-26 23:05:45,517 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2020-10-26 23:05:45,517 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2020-10-26 23:05:45,518 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-10-26 23:05:45,518 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2020-10-26 23:05:45,518 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2020-10-26 23:05:45,518 INFO  L138        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
WARNING: An illegal reflective access operation has occurred
WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int)
WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true;
[2020-10-26 23:05:45,999 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2020-10-26 23:05:46,029 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2020-10-26 23:05:46,033 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2020-10-26 23:05:46,035 INFO  L271        PluginConnector]: Initializing CDTParser...
[2020-10-26 23:05:46,036 INFO  L275        PluginConnector]: CDTParser initialized
[2020-10-26 23:05:46,037 INFO  L432   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem13_label12.c
[2020-10-26 23:05:46,136 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b92f4a396/217f103dfb234c9181472c4b8fab9e61/FLAGac0287df9
[2020-10-26 23:05:47,447 INFO  L306              CDTParser]: Found 1 translation units.
[2020-10-26 23:05:47,448 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem13_label12.c
[2020-10-26 23:05:47,490 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b92f4a396/217f103dfb234c9181472c4b8fab9e61/FLAGac0287df9
[2020-10-26 23:05:47,767 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b92f4a396/217f103dfb234c9181472c4b8fab9e61
[2020-10-26 23:05:47,772 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2020-10-26 23:05:47,782 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2020-10-26 23:05:47,788 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2020-10-26 23:05:47,788 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2020-10-26 23:05:47,793 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2020-10-26 23:05:47,796 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 11:05:47" (1/1) ...
[2020-10-26 23:05:47,802 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@51498653 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:05:47, skipping insertion in model container
[2020-10-26 23:05:47,802 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 11:05:47" (1/1) ...
[2020-10-26 23:05:47,813 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2020-10-26 23:05:48,045 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2020-10-26 23:05:49,881 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-10-26 23:05:49,904 INFO  L203         MainTranslator]: Completed pre-run
[2020-10-26 23:05:50,698 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-10-26 23:05:50,743 INFO  L208         MainTranslator]: Completed translation
[2020-10-26 23:05:50,745 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:05:50 WrapperNode
[2020-10-26 23:05:50,745 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2020-10-26 23:05:50,747 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2020-10-26 23:05:50,747 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2020-10-26 23:05:50,748 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2020-10-26 23:05:50,764 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:05:50" (1/1) ...
[2020-10-26 23:05:50,764 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:05:50" (1/1) ...
[2020-10-26 23:05:50,865 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:05:50" (1/1) ...
[2020-10-26 23:05:50,865 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:05:50" (1/1) ...
[2020-10-26 23:05:51,060 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:05:50" (1/1) ...
[2020-10-26 23:05:51,110 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:05:50" (1/1) ...
[2020-10-26 23:05:51,161 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:05:50" (1/1) ...
[2020-10-26 23:05:51,319 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2020-10-26 23:05:51,321 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2020-10-26 23:05:51,321 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2020-10-26 23:05:51,321 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2020-10-26 23:05:51,323 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:05:50" (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
[2020-10-26 23:05:51,431 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2020-10-26 23:05:51,431 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2020-10-26 23:05:51,432 INFO  L138     BoogieDeclarations]: Found implementation of procedure reach_error
[2020-10-26 23:05:51,432 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output
[2020-10-26 23:05:51,433 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output2
[2020-10-26 23:05:51,433 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output3
[2020-10-26 23:05:51,433 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output4
[2020-10-26 23:05:51,434 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2020-10-26 23:05:51,434 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output
[2020-10-26 23:05:51,434 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output2
[2020-10-26 23:05:51,435 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output3
[2020-10-26 23:05:51,435 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output4
[2020-10-26 23:05:51,435 INFO  L130     BoogieDeclarations]: Found specification of procedure abort
[2020-10-26 23:05:51,435 INFO  L130     BoogieDeclarations]: Found specification of procedure __assert_fail
[2020-10-26 23:05:51,436 INFO  L130     BoogieDeclarations]: Found specification of procedure reach_error
[2020-10-26 23:05:51,437 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack
[2020-10-26 23:05:51,437 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int
[2020-10-26 23:05:51,437 INFO  L130     BoogieDeclarations]: Found specification of procedure exit
[2020-10-26 23:05:51,437 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2020-10-26 23:05:51,438 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2020-10-26 23:05:51,438 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~int
[2020-10-26 23:05:51,438 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2020-10-26 23:05:51,438 INFO  L130     BoogieDeclarations]: Found specification of procedure write~int
[2020-10-26 23:05:51,438 INFO  L130     BoogieDeclarations]: Found specification of procedure read~int
[2020-10-26 23:05:51,438 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc
[2020-10-26 23:06:03,381 INFO  L293             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2020-10-26 23:06:03,381 INFO  L298             CfgBuilder]: Removed 1 assume(true) statements.
[2020-10-26 23:06:03,387 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 11:06:03 BoogieIcfgContainer
[2020-10-26 23:06:03,387 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2020-10-26 23:06:03,390 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2020-10-26 23:06:03,390 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2020-10-26 23:06:03,394 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2020-10-26 23:06:03,394 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 11:05:47" (1/3) ...
[2020-10-26 23:06:03,396 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d8b6471 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 11:06:03, skipping insertion in model container
[2020-10-26 23:06:03,396 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:05:50" (2/3) ...
[2020-10-26 23:06:03,396 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d8b6471 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 11:06:03, skipping insertion in model container
[2020-10-26 23:06:03,397 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 11:06:03" (3/3) ...
[2020-10-26 23:06:03,399 INFO  L111   eAbstractionObserver]: Analyzing ICFG Problem13_label12.c
[2020-10-26 23:06:03,416 INFO  L164   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION
[2020-10-26 23:06:03,426 INFO  L176   ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2020-10-26 23:06:03,445 INFO  L253      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2020-10-26 23:06:03,493 INFO  L377      AbstractCegarLoop]: Interprodecural is true
[2020-10-26 23:06:03,493 INFO  L378      AbstractCegarLoop]: Hoare is true
[2020-10-26 23:06:03,493 INFO  L379      AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation
[2020-10-26 23:06:03,493 INFO  L380      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2020-10-26 23:06:03,494 INFO  L381      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2020-10-26 23:06:03,494 INFO  L382      AbstractCegarLoop]: Difference is false
[2020-10-26 23:06:03,494 INFO  L383      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2020-10-26 23:06:03,494 INFO  L387      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2020-10-26 23:06:03,544 INFO  L276                IsEmpty]: Start isEmpty. Operand 1123 states.
[2020-10-26 23:06:03,553 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 17
[2020-10-26 23:06:03,553 INFO  L414         BasicCegarLoop]: Found error trace
[2020-10-26 23:06:03,555 INFO  L422         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-10-26 23:06:03,556 INFO  L429      AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-10-26 23:06:03,564 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-10-26 23:06:03,564 INFO  L82        PathProgramCache]: Analyzing trace with hash 249371746, now seen corresponding path program 1 times
[2020-10-26 23:06:03,577 INFO  L162   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-10-26 23:06:03,578 INFO  L353   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [569874170]
[2020-10-26 23:06:03,578 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-10-26 23:06:03,838 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-26 23:06:03,899 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-26 23:06:04,336 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-10-26 23:06:04,337 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 26
[2020-10-26 23:06:04,337 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-10-26 23:06:04,338 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 489
[2020-10-26 23:06:04,340 FATAL L256   erpolLogProxyWrapper]: Heuristic: SHALLOWEST
[2020-10-26 23:06:04,341 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 6
[2020-10-26 23:06:04,341 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 5
[2020-10-26 23:06:04,341 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 17
[2020-10-26 23:06:04,341 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 3
[2020-10-26 23:06:04,520 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-10-26 23:06:04,530 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-26 23:06:04,537 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-26 23:06:04,574 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-10-26 23:06:04,574 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 8
[2020-10-26 23:06:04,574 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-10-26 23:06:04,574 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 42
[2020-10-26 23:06:04,575 FATAL L256   erpolLogProxyWrapper]: Heuristic: SHALLOWEST
[2020-10-26 23:06:04,575 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 2
[2020-10-26 23:06:04,576 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 1
[2020-10-26 23:06:04,576 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 2
[2020-10-26 23:06:04,577 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-10-26 23:06:04,608 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-10-26 23:06:04,609 INFO  L353   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [569874170]
[2020-10-26 23:06:04,611 INFO  L219   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-10-26 23:06:04,612 INFO  L232   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-10-26 23:06:04,613 INFO  L155   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716679956]
[2020-10-26 23:06:04,619 INFO  L461      AbstractCegarLoop]: Interpolant automaton has 5 states
[2020-10-26 23:06:04,619 INFO  L142   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-10-26 23:06:04,640 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2020-10-26 23:06:04,641 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20
[2020-10-26 23:06:04,644 INFO  L87              Difference]: Start difference. First operand 1123 states. Second operand 5 states.
[2020-10-26 23:06:32,707 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-10-26 23:06:32,707 INFO  L93              Difference]: Finished difference Result 4084 states and 7567 transitions.
[2020-10-26 23:06:32,709 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2020-10-26 23:06:32,711 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 16
[2020-10-26 23:06:32,712 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-10-26 23:06:32,769 INFO  L225             Difference]: With dead ends: 4084
[2020-10-26 23:06:32,769 INFO  L226             Difference]: Without dead ends: 2872
[2020-10-26 23:06:32,791 INFO  L677         BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42
[2020-10-26 23:06:32,829 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 2872 states.
[2020-10-26 23:06:33,030 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 2872 to 1934.
[2020-10-26 23:06:33,032 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 1934 states.
[2020-10-26 23:06:33,049 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 1934 states to 1934 states and 3163 transitions.
[2020-10-26 23:06:33,052 INFO  L78                 Accepts]: Start accepts. Automaton has 1934 states and 3163 transitions. Word has length 16
[2020-10-26 23:06:33,052 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-10-26 23:06:33,053 INFO  L481      AbstractCegarLoop]: Abstraction has 1934 states and 3163 transitions.
[2020-10-26 23:06:33,053 INFO  L482      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2020-10-26 23:06:33,054 INFO  L276                IsEmpty]: Start isEmpty. Operand 1934 states and 3163 transitions.
[2020-10-26 23:06:33,062 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 92
[2020-10-26 23:06:33,062 INFO  L414         BasicCegarLoop]: Found error trace
[2020-10-26 23:06:33,063 INFO  L422         BasicCegarLoop]: trace histogram [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]
[2020-10-26 23:06:33,064 WARN  L518      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2020-10-26 23:06:33,065 INFO  L429      AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-10-26 23:06:33,065 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-10-26 23:06:33,066 INFO  L82        PathProgramCache]: Analyzing trace with hash -733705670, now seen corresponding path program 1 times
[2020-10-26 23:06:33,067 INFO  L162   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-10-26 23:06:33,067 INFO  L353   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1102937072]
[2020-10-26 23:06:33,069 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-10-26 23:06:33,190 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-26 23:06:33,263 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-26 23:06:33,754 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-26 23:06:34,624 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-10-26 23:06:34,625 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 103
[2020-10-26 23:06:34,625 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 2
[2020-10-26 23:06:34,626 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 1432
[2020-10-26 23:06:34,627 FATAL L256   erpolLogProxyWrapper]: Heuristic: SHALLOWEST
[2020-10-26 23:06:34,627 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 6
[2020-10-26 23:06:34,627 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 5
[2020-10-26 23:06:34,628 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 81
[2020-10-26 23:06:34,629 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 2
[2020-10-26 23:06:34,803 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-10-26 23:06:34,820 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-26 23:06:34,828 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-26 23:06:34,859 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-10-26 23:06:34,860 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 8
[2020-10-26 23:06:34,860 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-10-26 23:06:34,861 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 37
[2020-10-26 23:06:34,862 FATAL L256   erpolLogProxyWrapper]: Heuristic: SHALLOWEST
[2020-10-26 23:06:34,863 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 2
[2020-10-26 23:06:34,864 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 1
[2020-10-26 23:06:34,864 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 2
[2020-10-26 23:06:34,864 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-10-26 23:06:34,923 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8
[2020-10-26 23:06:34,972 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-26 23:06:34,994 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-26 23:06:35,336 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-10-26 23:06:35,337 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 76
[2020-10-26 23:06:35,337 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-10-26 23:06:35,338 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 362
[2020-10-26 23:06:35,338 FATAL L256   erpolLogProxyWrapper]: Heuristic: SHALLOWEST
[2020-10-26 23:06:35,338 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 4
[2020-10-26 23:06:35,339 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 0
[2020-10-26 23:06:35,339 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 76
[2020-10-26 23:06:35,339 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-10-26 23:06:35,696 INFO  L134       CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-10-26 23:06:35,697 INFO  L353   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1102937072]
[2020-10-26 23:06:35,697 INFO  L219   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-10-26 23:06:35,698 INFO  L232   FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6
[2020-10-26 23:06:35,698 INFO  L155   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670374407]
[2020-10-26 23:06:35,700 INFO  L461      AbstractCegarLoop]: Interpolant automaton has 7 states
[2020-10-26 23:06:35,701 INFO  L142   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-10-26 23:06:35,702 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2020-10-26 23:06:35,703 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42
[2020-10-26 23:06:35,703 INFO  L87              Difference]: Start difference. First operand 1934 states and 3163 transitions. Second operand 7 states.
[2020-10-26 23:07:03,742 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-10-26 23:07:03,742 INFO  L93              Difference]: Finished difference Result 5678 states and 9484 transitions.
[2020-10-26 23:07:03,743 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2020-10-26 23:07:03,744 INFO  L78                 Accepts]: Start accepts. Automaton has 7 states. Word has length 91
[2020-10-26 23:07:03,745 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-10-26 23:07:03,779 INFO  L225             Difference]: With dead ends: 5678
[2020-10-26 23:07:03,779 INFO  L226             Difference]: Without dead ends: 3750
[2020-10-26 23:07:03,788 INFO  L677         BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110
[2020-10-26 23:07:03,796 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 3750 states.
[2020-10-26 23:07:03,916 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 3750 to 3648.
[2020-10-26 23:07:03,917 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 3648 states.
[2020-10-26 23:07:03,933 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 3648 states to 3648 states and 5462 transitions.
[2020-10-26 23:07:03,933 INFO  L78                 Accepts]: Start accepts. Automaton has 3648 states and 5462 transitions. Word has length 91
[2020-10-26 23:07:03,934 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-10-26 23:07:03,934 INFO  L481      AbstractCegarLoop]: Abstraction has 3648 states and 5462 transitions.
[2020-10-26 23:07:03,934 INFO  L482      AbstractCegarLoop]: Interpolant automaton has 7 states.
[2020-10-26 23:07:03,934 INFO  L276                IsEmpty]: Start isEmpty. Operand 3648 states and 5462 transitions.
[2020-10-26 23:07:03,937 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 106
[2020-10-26 23:07:03,938 INFO  L414         BasicCegarLoop]: Found error trace
[2020-10-26 23:07:03,938 INFO  L422         BasicCegarLoop]: trace histogram [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]
[2020-10-26 23:07:03,938 WARN  L518      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2020-10-26 23:07:03,938 INFO  L429      AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-10-26 23:07:03,939 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-10-26 23:07:03,939 INFO  L82        PathProgramCache]: Analyzing trace with hash 1144762622, now seen corresponding path program 1 times
[2020-10-26 23:07:03,939 INFO  L162   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-10-26 23:07:03,940 INFO  L353   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [58033130]
[2020-10-26 23:07:03,940 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-10-26 23:07:03,978 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-26 23:07:04,003 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-26 23:07:04,252 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-26 23:07:05,190 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-10-26 23:07:05,191 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 117
[2020-10-26 23:07:05,191 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 2
[2020-10-26 23:07:05,191 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 1210
[2020-10-26 23:07:05,191 FATAL L256   erpolLogProxyWrapper]: Heuristic: SHALLOWEST
[2020-10-26 23:07:05,192 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 6
[2020-10-26 23:07:05,192 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 5
[2020-10-26 23:07:05,192 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 95
[2020-10-26 23:07:05,192 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-10-26 23:07:05,328 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-10-26 23:07:05,336 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-26 23:07:05,339 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-26 23:07:05,354 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-10-26 23:07:05,355 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 8
[2020-10-26 23:07:05,355 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-10-26 23:07:05,355 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 17
[2020-10-26 23:07:05,355 FATAL L256   erpolLogProxyWrapper]: Heuristic: SHALLOWEST
[2020-10-26 23:07:05,355 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 2
[2020-10-26 23:07:05,355 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 1
[2020-10-26 23:07:05,356 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 2
[2020-10-26 23:07:05,356 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-10-26 23:07:05,384 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8
[2020-10-26 23:07:05,412 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-26 23:07:05,433 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-26 23:07:05,625 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-10-26 23:07:05,625 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 90
[2020-10-26 23:07:05,626 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-10-26 23:07:05,626 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 212
[2020-10-26 23:07:05,626 FATAL L256   erpolLogProxyWrapper]: Heuristic: SHALLOWEST
[2020-10-26 23:07:05,626 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 4
[2020-10-26 23:07:05,626 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 0
[2020-10-26 23:07:05,626 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 90
[2020-10-26 23:07:05,627 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-10-26 23:07:05,733 INFO  L134       CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-10-26 23:07:05,734 INFO  L353   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [58033130]
[2020-10-26 23:07:05,734 INFO  L219   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-10-26 23:07:05,735 INFO  L232   FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6
[2020-10-26 23:07:05,735 INFO  L155   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856158502]
[2020-10-26 23:07:05,736 INFO  L461      AbstractCegarLoop]: Interpolant automaton has 7 states
[2020-10-26 23:07:05,736 INFO  L142   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-10-26 23:07:05,736 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2020-10-26 23:07:05,737 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42
[2020-10-26 23:07:05,737 INFO  L87              Difference]: Start difference. First operand 3648 states and 5462 transitions. Second operand 7 states.
[2020-10-26 23:07:31,022 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-10-26 23:07:31,022 INFO  L93              Difference]: Finished difference Result 10918 states and 16788 transitions.
[2020-10-26 23:07:31,024 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2020-10-26 23:07:31,024 INFO  L78                 Accepts]: Start accepts. Automaton has 7 states. Word has length 105
[2020-10-26 23:07:31,028 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-10-26 23:07:31,076 INFO  L225             Difference]: With dead ends: 10918
[2020-10-26 23:07:31,076 INFO  L226             Difference]: Without dead ends: 7276
[2020-10-26 23:07:31,091 INFO  L677         BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132
[2020-10-26 23:07:31,102 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 7276 states.
[2020-10-26 23:07:31,314 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 7276 to 7112.
[2020-10-26 23:07:31,315 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 7112 states.
[2020-10-26 23:07:31,335 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 7112 states to 7112 states and 9624 transitions.
[2020-10-26 23:07:31,336 INFO  L78                 Accepts]: Start accepts. Automaton has 7112 states and 9624 transitions. Word has length 105
[2020-10-26 23:07:31,337 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-10-26 23:07:31,337 INFO  L481      AbstractCegarLoop]: Abstraction has 7112 states and 9624 transitions.
[2020-10-26 23:07:31,337 INFO  L482      AbstractCegarLoop]: Interpolant automaton has 7 states.
[2020-10-26 23:07:31,337 INFO  L276                IsEmpty]: Start isEmpty. Operand 7112 states and 9624 transitions.
[2020-10-26 23:07:31,340 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 135
[2020-10-26 23:07:31,340 INFO  L414         BasicCegarLoop]: Found error trace
[2020-10-26 23:07:31,341 INFO  L422         BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1]
[2020-10-26 23:07:31,341 WARN  L518      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2020-10-26 23:07:31,341 INFO  L429      AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-10-26 23:07:31,342 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-10-26 23:07:31,342 INFO  L82        PathProgramCache]: Analyzing trace with hash -451542954, now seen corresponding path program 1 times
[2020-10-26 23:07:31,342 INFO  L162   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-10-26 23:07:31,342 INFO  L353   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1320972306]
[2020-10-26 23:07:31,343 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-10-26 23:07:31,389 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-26 23:07:31,422 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-26 23:07:31,749 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-26 23:07:32,553 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-26 23:07:32,703 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-10-26 23:07:32,704 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 146
[2020-10-26 23:07:32,704 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 3
[2020-10-26 23:07:32,704 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 1310
[2020-10-26 23:07:32,704 FATAL L256   erpolLogProxyWrapper]: Heuristic: SHALLOWEST
[2020-10-26 23:07:32,704 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 8
[2020-10-26 23:07:32,705 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 5
[2020-10-26 23:07:32,705 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 137
[2020-10-26 23:07:32,705 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-10-26 23:07:32,865 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-10-26 23:07:32,874 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-26 23:07:32,878 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-26 23:07:32,893 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-10-26 23:07:32,894 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 8
[2020-10-26 23:07:32,894 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-10-26 23:07:32,894 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 18
[2020-10-26 23:07:32,894 FATAL L256   erpolLogProxyWrapper]: Heuristic: SHALLOWEST
[2020-10-26 23:07:32,894 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 2
[2020-10-26 23:07:32,894 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 1
[2020-10-26 23:07:32,895 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 2
[2020-10-26 23:07:32,895 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-10-26 23:07:32,927 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8
[2020-10-26 23:07:32,960 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-26 23:07:32,986 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-26 23:07:33,077 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-26 23:07:33,376 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-10-26 23:07:33,376 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 119
[2020-10-26 23:07:33,377 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 2
[2020-10-26 23:07:33,377 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 415
[2020-10-26 23:07:33,377 FATAL L256   erpolLogProxyWrapper]: Heuristic: SHALLOWEST
[2020-10-26 23:07:33,377 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 4
[2020-10-26 23:07:33,377 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 0
[2020-10-26 23:07:33,378 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 119
[2020-10-26 23:07:33,378 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-10-26 23:07:33,495 INFO  L134       CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked.
[2020-10-26 23:07:33,495 INFO  L353   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1320972306]
[2020-10-26 23:07:33,495 INFO  L219   FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-10-26 23:07:33,495 INFO  L232   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6
[2020-10-26 23:07:33,496 INFO  L155   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606676200]
[2020-10-26 23:07:33,496 INFO  L461      AbstractCegarLoop]: Interpolant automaton has 7 states
[2020-10-26 23:07:33,497 INFO  L142   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-10-26 23:07:33,497 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2020-10-26 23:07:33,497 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42
[2020-10-26 23:07:33,497 INFO  L87              Difference]: Start difference. First operand 7112 states and 9624 transitions. Second operand 7 states.
[2020-10-26 23:08:01,560 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-10-26 23:08:01,560 INFO  L93              Difference]: Finished difference Result 21172 states and 29571 transitions.
[2020-10-26 23:08:01,563 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. 
[2020-10-26 23:08:01,563 INFO  L78                 Accepts]: Start accepts. Automaton has 7 states. Word has length 134
[2020-10-26 23:08:01,564 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-10-26 23:08:01,668 INFO  L225             Difference]: With dead ends: 21172
[2020-10-26 23:08:01,668 INFO  L226             Difference]: Without dead ends: 14066
[2020-10-26 23:08:01,695 INFO  L677         BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132
[2020-10-26 23:08:01,717 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 14066 states.
[2020-10-26 23:08:02,092 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 14066 to 13997.
[2020-10-26 23:08:02,092 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 13997 states.
[2020-10-26 23:08:02,129 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13997 states to 13997 states and 18814 transitions.
[2020-10-26 23:08:02,130 INFO  L78                 Accepts]: Start accepts. Automaton has 13997 states and 18814 transitions. Word has length 134
[2020-10-26 23:08:02,132 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-10-26 23:08:02,132 INFO  L481      AbstractCegarLoop]: Abstraction has 13997 states and 18814 transitions.
[2020-10-26 23:08:02,132 INFO  L482      AbstractCegarLoop]: Interpolant automaton has 7 states.
[2020-10-26 23:08:02,132 INFO  L276                IsEmpty]: Start isEmpty. Operand 13997 states and 18814 transitions.
[2020-10-26 23:08:02,147 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 222
[2020-10-26 23:08:02,147 INFO  L414         BasicCegarLoop]: Found error trace
[2020-10-26 23:08:02,148 INFO  L422         BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-10-26 23:08:02,148 WARN  L518      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3
[2020-10-26 23:08:02,148 INFO  L429      AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-10-26 23:08:02,149 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-10-26 23:08:02,149 INFO  L82        PathProgramCache]: Analyzing trace with hash 1357053122, now seen corresponding path program 1 times
[2020-10-26 23:08:02,151 INFO  L162   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-10-26 23:08:02,151 INFO  L353   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2108041771]
[2020-10-26 23:08:02,151 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-10-26 23:08:02,243 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-26 23:08:02,319 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-26 23:08:02,515 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-26 23:08:02,843 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-26 23:08:03,257 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-26 23:08:06,360 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-10-26 23:08:06,361 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 235
[2020-10-26 23:08:06,361 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 4
[2020-10-26 23:08:06,361 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 4112
[2020-10-26 23:08:06,361 FATAL L256   erpolLogProxyWrapper]: Heuristic: SHALLOWEST
[2020-10-26 23:08:06,361 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 8
[2020-10-26 23:08:06,361 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 5
[2020-10-26 23:08:06,362 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 213
[2020-10-26 23:08:06,362 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-10-26 23:08:06,527 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-10-26 23:08:06,534 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-26 23:08:06,538 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-26 23:08:06,552 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-10-26 23:08:06,552 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 8
[2020-10-26 23:08:06,552 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-10-26 23:08:06,552 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 16
[2020-10-26 23:08:06,552 FATAL L256   erpolLogProxyWrapper]: Heuristic: SHALLOWEST
[2020-10-26 23:08:06,553 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 2
[2020-10-26 23:08:06,553 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 1
[2020-10-26 23:08:06,553 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 2
[2020-10-26 23:08:06,553 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-10-26 23:08:06,607 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8
[2020-10-26 23:08:06,644 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-26 23:08:06,667 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-26 23:08:06,765 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-26 23:08:06,980 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-10-26 23:08:06,980 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 130
[2020-10-26 23:08:06,980 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 2
[2020-10-26 23:08:06,981 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 335
[2020-10-26 23:08:06,981 FATAL L256   erpolLogProxyWrapper]: Heuristic: SHALLOWEST
[2020-10-26 23:08:06,982 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 4
[2020-10-26 23:08:06,982 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 0
[2020-10-26 23:08:06,982 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 130
[2020-10-26 23:08:06,982 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-10-26 23:08:07,078 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137
[2020-10-26 23:08:07,103 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-26 23:08:07,119 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-26 23:08:07,289 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-10-26 23:08:07,290 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 77
[2020-10-26 23:08:07,290 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-10-26 23:08:07,290 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 184
[2020-10-26 23:08:07,290 FATAL L256   erpolLogProxyWrapper]: Heuristic: SHALLOWEST
[2020-10-26 23:08:07,291 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 4
[2020-10-26 23:08:07,295 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 0
[2020-10-26 23:08:07,296 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 77
[2020-10-26 23:08:07,296 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 5
[2020-10-26 23:08:07,619 INFO  L134       CoverageAnalysis]: Checked inductivity of 92 backedges. 17 proven. 71 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked.
[2020-10-26 23:08:07,620 INFO  L353   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2108041771]
[2020-10-26 23:08:07,620 INFO  L219   FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-10-26 23:08:07,621 INFO  L232   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7
[2020-10-26 23:08:07,621 INFO  L155   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639206730]
[2020-10-26 23:08:07,622 INFO  L461      AbstractCegarLoop]: Interpolant automaton has 8 states
[2020-10-26 23:08:07,622 INFO  L142   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-10-26 23:08:07,623 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2020-10-26 23:08:07,623 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56
[2020-10-26 23:08:07,623 INFO  L87              Difference]: Start difference. First operand 13997 states and 18814 transitions. Second operand 8 states.
[2020-10-26 23:08:07,769 WARN  L193               SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 66
[2020-10-26 23:08:39,103 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-10-26 23:08:39,104 INFO  L93              Difference]: Finished difference Result 39436 states and 56983 transitions.
[2020-10-26 23:08:39,108 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2020-10-26 23:08:39,108 INFO  L78                 Accepts]: Start accepts. Automaton has 8 states. Word has length 221
[2020-10-26 23:08:39,111 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-10-26 23:08:39,313 INFO  L225             Difference]: With dead ends: 39436
[2020-10-26 23:08:39,313 INFO  L226             Difference]: Without dead ends: 26248
[2020-10-26 23:08:39,365 INFO  L677         BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156
[2020-10-26 23:08:39,410 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 26248 states.
[2020-10-26 23:08:40,095 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 26248 to 24430.
[2020-10-26 23:08:40,095 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 24430 states.
[2020-10-26 23:08:40,168 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 24430 states to 24430 states and 32513 transitions.
[2020-10-26 23:08:40,170 INFO  L78                 Accepts]: Start accepts. Automaton has 24430 states and 32513 transitions. Word has length 221
[2020-10-26 23:08:40,170 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-10-26 23:08:40,171 INFO  L481      AbstractCegarLoop]: Abstraction has 24430 states and 32513 transitions.
[2020-10-26 23:08:40,171 INFO  L482      AbstractCegarLoop]: Interpolant automaton has 8 states.
[2020-10-26 23:08:40,171 INFO  L276                IsEmpty]: Start isEmpty. Operand 24430 states and 32513 transitions.
[2020-10-26 23:08:40,175 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 226
[2020-10-26 23:08:40,176 INFO  L414         BasicCegarLoop]: Found error trace
[2020-10-26 23:08:40,176 INFO  L422         BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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]
[2020-10-26 23:08:40,176 WARN  L518      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4
[2020-10-26 23:08:40,177 INFO  L429      AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-10-26 23:08:40,177 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-10-26 23:08:40,177 INFO  L82        PathProgramCache]: Analyzing trace with hash 659549589, now seen corresponding path program 1 times
[2020-10-26 23:08:40,178 INFO  L162   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-10-26 23:08:40,178 INFO  L353   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [564157664]
[2020-10-26 23:08:40,178 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-10-26 23:08:40,256 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-26 23:08:40,308 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-26 23:08:40,426 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-26 23:08:40,921 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-26 23:08:43,162 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-26 23:08:43,438 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-26 23:08:45,298 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-10-26 23:08:45,300 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 239
[2020-10-26 23:08:45,300 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 5
[2020-10-26 23:08:45,300 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 5035
[2020-10-26 23:08:45,300 FATAL L256   erpolLogProxyWrapper]: Heuristic: SHALLOWEST
[2020-10-26 23:08:45,301 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 6
[2020-10-26 23:08:45,301 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 5
[2020-10-26 23:08:45,301 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 125
[2020-10-26 23:08:45,301 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-10-26 23:08:45,455 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-10-26 23:08:45,460 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-26 23:08:45,465 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-26 23:08:45,478 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-10-26 23:08:45,478 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 8
[2020-10-26 23:08:45,479 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-10-26 23:08:45,479 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 17
[2020-10-26 23:08:45,479 FATAL L256   erpolLogProxyWrapper]: Heuristic: SHALLOWEST
[2020-10-26 23:08:45,479 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 2
[2020-10-26 23:08:45,479 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 1
[2020-10-26 23:08:45,479 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 2
[2020-10-26 23:08:45,480 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-10-26 23:08:45,518 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8
[2020-10-26 23:08:45,553 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-26 23:08:45,577 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-26 23:08:45,708 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-26 23:08:45,986 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-10-26 23:08:45,987 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 121
[2020-10-26 23:08:45,987 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 2
[2020-10-26 23:08:45,987 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 432
[2020-10-26 23:08:45,988 FATAL L256   erpolLogProxyWrapper]: Heuristic: SHALLOWEST
[2020-10-26 23:08:45,988 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 4
[2020-10-26 23:08:45,988 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 0
[2020-10-26 23:08:45,988 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 121
[2020-10-26 23:08:45,989 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-10-26 23:08:46,120 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128
[2020-10-26 23:08:46,140 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-26 23:08:46,156 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-26 23:08:46,206 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-10-26 23:08:46,206 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 90
[2020-10-26 23:08:46,207 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-10-26 23:08:46,207 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 65
[2020-10-26 23:08:46,207 FATAL L256   erpolLogProxyWrapper]: Heuristic: SHALLOWEST
[2020-10-26 23:08:46,207 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-10-26 23:08:46,207 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 87
[2020-10-26 23:08:46,207 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-10-26 23:08:46,208 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-10-26 23:08:46,308 INFO  L134       CoverageAnalysis]: Checked inductivity of 105 backedges. 16 proven. 84 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked.
[2020-10-26 23:08:46,308 INFO  L353   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [564157664]
[2020-10-26 23:08:46,310 INFO  L219   FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-10-26 23:08:46,310 INFO  L232   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7
[2020-10-26 23:08:46,310 INFO  L155   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291003196]
[2020-10-26 23:08:46,311 INFO  L461      AbstractCegarLoop]: Interpolant automaton has 7 states
[2020-10-26 23:08:46,311 INFO  L142   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-10-26 23:08:46,318 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2020-10-26 23:08:46,319 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42
[2020-10-26 23:08:46,319 INFO  L87              Difference]: Start difference. First operand 24430 states and 32513 transitions. Second operand 7 states.
[2020-10-26 23:08:46,478 WARN  L193               SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 67
[2020-10-26 23:08:49,137 WARN  L193               SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 69
[2020-10-26 23:09:26,742 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-10-26 23:09:26,743 INFO  L93              Difference]: Finished difference Result 44897 states and 60577 transitions.
[2020-10-26 23:09:26,747 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2020-10-26 23:09:26,747 INFO  L78                 Accepts]: Start accepts. Automaton has 7 states. Word has length 225
[2020-10-26 23:09:26,748 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-10-26 23:09:26,851 INFO  L225             Difference]: With dead ends: 44897
[2020-10-26 23:09:26,851 INFO  L226             Difference]: Without dead ends: 24566
[2020-10-26 23:09:26,905 INFO  L677         BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110
[2020-10-26 23:09:26,942 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 24566 states.
[2020-10-26 23:09:27,601 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 24566 to 24447.
[2020-10-26 23:09:27,602 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 24447 states.
[2020-10-26 23:09:27,671 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 24447 states to 24447 states and 32503 transitions.
[2020-10-26 23:09:27,673 INFO  L78                 Accepts]: Start accepts. Automaton has 24447 states and 32503 transitions. Word has length 225
[2020-10-26 23:09:27,674 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-10-26 23:09:27,674 INFO  L481      AbstractCegarLoop]: Abstraction has 24447 states and 32503 transitions.
[2020-10-26 23:09:27,674 INFO  L482      AbstractCegarLoop]: Interpolant automaton has 7 states.
[2020-10-26 23:09:27,674 INFO  L276                IsEmpty]: Start isEmpty. Operand 24447 states and 32503 transitions.
[2020-10-26 23:09:27,680 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 262
[2020-10-26 23:09:27,680 INFO  L414         BasicCegarLoop]: Found error trace
[2020-10-26 23:09:27,680 INFO  L422         BasicCegarLoop]: trace histogram [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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-10-26 23:09:27,681 WARN  L518      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5
[2020-10-26 23:09:27,681 INFO  L429      AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-10-26 23:09:27,685 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-10-26 23:09:27,685 INFO  L82        PathProgramCache]: Analyzing trace with hash -1988715558, now seen corresponding path program 1 times
[2020-10-26 23:09:27,685 INFO  L162   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-10-26 23:09:27,685 INFO  L353   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [862466558]
[2020-10-26 23:09:27,686 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-10-26 23:09:27,756 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-26 23:09:27,807 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-26 23:09:27,926 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-26 23:09:28,697 FATAL L256   erpolLogProxyWrapper]: Now shrinking...