/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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 --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/Problem05_label50.c


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


This is Ultimate 0.2.0-0f64333
[2020-10-29 05:31:08,775 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2020-10-29 05:31:08,778 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2020-10-29 05:31:08,815 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2020-10-29 05:31:08,816 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2020-10-29 05:31:08,817 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2020-10-29 05:31:08,819 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2020-10-29 05:31:08,821 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2020-10-29 05:31:08,824 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
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[2020-10-29 05:31:08,828 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2020-10-29 05:31:08,830 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2020-10-29 05:31:08,831 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2020-10-29 05:31:08,832 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2020-10-29 05:31:08,834 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2020-10-29 05:31:08,835 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2020-10-29 05:31:08,837 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2020-10-29 05:31:08,839 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2020-10-29 05:31:08,841 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2020-10-29 05:31:08,843 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2020-10-29 05:31:08,844 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2020-10-29 05:31:08,846 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2020-10-29 05:31:08,849 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2020-10-29 05:31:08,849 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2020-10-29 05:31:08,850 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2020-10-29 05:31:08,851 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2020-10-29 05:31:08,852 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2020-10-29 05:31:08,853 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2020-10-29 05:31:08,853 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
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[2020-10-29 05:31:08,860 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2020-10-29 05:31:08,861 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2020-10-29 05:31:08,862 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2020-10-29 05:31:08,863 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
[2020-10-29 05:31:08,863 INFO  L184        SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2020-10-29 05:31:08,864 INFO  L184        SettingsManager]: ReqParser provides no preferences, ignoring...
[2020-10-29 05:31:08,864 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
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[2020-10-29 05:31:08,865 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2020-10-29 05:31:08,867 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
[2020-10-29 05:31:08,906 INFO  L113        SettingsManager]: Loading preferences was successful
[2020-10-29 05:31:08,906 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2020-10-29 05:31:08,908 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2020-10-29 05:31:08,908 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2020-10-29 05:31:08,909 INFO  L138        SettingsManager]:  * Use SBE=true
[2020-10-29 05:31:08,909 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2020-10-29 05:31:08,909 INFO  L138        SettingsManager]:  * sizeof long=4
[2020-10-29 05:31:08,909 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2020-10-29 05:31:08,909 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2020-10-29 05:31:08,910 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2020-10-29 05:31:08,910 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2020-10-29 05:31:08,912 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2020-10-29 05:31:08,912 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2020-10-29 05:31:08,912 INFO  L138        SettingsManager]:  * sizeof long double=12
[2020-10-29 05:31:08,912 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2020-10-29 05:31:08,912 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2020-10-29 05:31:08,913 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2020-10-29 05:31:08,913 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2020-10-29 05:31:08,913 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2020-10-29 05:31:08,913 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2020-10-29 05:31:08,913 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2020-10-29 05:31:08,913 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-10-29 05:31:08,914 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2020-10-29 05:31:08,914 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2020-10-29 05:31:08,915 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2020-10-29 05:31:08,915 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2020-10-29 05:31:08,915 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-10-29 05:31:08,915 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2020-10-29 05:31:08,916 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2020-10-29 05:31:08,916 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$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true;
[2020-10-29 05:31:09,355 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2020-10-29 05:31:09,384 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2020-10-29 05:31:09,387 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2020-10-29 05:31:09,388 INFO  L271        PluginConnector]: Initializing CDTParser...
[2020-10-29 05:31:09,389 INFO  L275        PluginConnector]: CDTParser initialized
[2020-10-29 05:31:09,390 INFO  L432   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem05_label50.c
[2020-10-29 05:31:09,469 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/62867e90c/5f86be1e56c143da9dc082d86bcf684a/FLAG578f5721b
[2020-10-29 05:31:10,665 INFO  L306              CDTParser]: Found 1 translation units.
[2020-10-29 05:31:10,666 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem05_label50.c
[2020-10-29 05:31:10,730 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/62867e90c/5f86be1e56c143da9dc082d86bcf684a/FLAG578f5721b
[2020-10-29 05:31:10,971 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/62867e90c/5f86be1e56c143da9dc082d86bcf684a
[2020-10-29 05:31:10,974 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2020-10-29 05:31:10,981 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2020-10-29 05:31:10,984 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2020-10-29 05:31:10,984 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2020-10-29 05:31:10,988 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2020-10-29 05:31:10,990 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 05:31:10" (1/1) ...
[2020-10-29 05:31:10,994 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4742c2a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:31:10, skipping insertion in model container
[2020-10-29 05:31:10,995 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 05:31:10" (1/1) ...
[2020-10-29 05:31:11,004 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2020-10-29 05:31:11,255 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2020-10-29 05:31:13,529 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-10-29 05:31:13,546 INFO  L203         MainTranslator]: Completed pre-run
[2020-10-29 05:31:14,735 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-10-29 05:31:14,808 INFO  L208         MainTranslator]: Completed translation
[2020-10-29 05:31:14,809 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:31:14 WrapperNode
[2020-10-29 05:31:14,809 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2020-10-29 05:31:14,810 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2020-10-29 05:31:14,810 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2020-10-29 05:31:14,810 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2020-10-29 05:31:14,827 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:31:14" (1/1) ...
[2020-10-29 05:31:14,827 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:31:14" (1/1) ...
[2020-10-29 05:31:14,948 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:31:14" (1/1) ...
[2020-10-29 05:31:14,949 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:31:14" (1/1) ...
[2020-10-29 05:31:15,171 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:31:14" (1/1) ...
[2020-10-29 05:31:15,310 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:31:14" (1/1) ...
[2020-10-29 05:31:15,393 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:31:14" (1/1) ...
[2020-10-29 05:31:15,456 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2020-10-29 05:31:15,458 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2020-10-29 05:31:15,458 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2020-10-29 05:31:15,458 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2020-10-29 05:31:15,460 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:31:14" (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
[2020-10-29 05:31:15,617 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2020-10-29 05:31:15,622 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2020-10-29 05:31:15,623 INFO  L138     BoogieDeclarations]: Found implementation of procedure reach_error
[2020-10-29 05:31:15,623 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output
[2020-10-29 05:31:15,624 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output2
[2020-10-29 05:31:15,624 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output3
[2020-10-29 05:31:15,624 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output4
[2020-10-29 05:31:15,624 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output5
[2020-10-29 05:31:15,624 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output6
[2020-10-29 05:31:15,625 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output7
[2020-10-29 05:31:15,628 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output8
[2020-10-29 05:31:15,628 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2020-10-29 05:31:15,628 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output
[2020-10-29 05:31:15,629 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output2
[2020-10-29 05:31:15,629 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output3
[2020-10-29 05:31:15,632 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output4
[2020-10-29 05:31:15,633 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output5
[2020-10-29 05:31:15,633 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output6
[2020-10-29 05:31:15,633 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output7
[2020-10-29 05:31:15,633 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output8
[2020-10-29 05:31:15,634 INFO  L130     BoogieDeclarations]: Found specification of procedure abort
[2020-10-29 05:31:15,634 INFO  L130     BoogieDeclarations]: Found specification of procedure __assert_fail
[2020-10-29 05:31:15,634 INFO  L130     BoogieDeclarations]: Found specification of procedure reach_error
[2020-10-29 05:31:15,634 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack
[2020-10-29 05:31:15,634 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int
[2020-10-29 05:31:15,634 INFO  L130     BoogieDeclarations]: Found specification of procedure exit
[2020-10-29 05:31:15,635 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2020-10-29 05:31:15,635 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2020-10-29 05:31:15,635 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~int
[2020-10-29 05:31:15,635 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2020-10-29 05:31:15,635 INFO  L130     BoogieDeclarations]: Found specification of procedure write~int
[2020-10-29 05:31:15,635 INFO  L130     BoogieDeclarations]: Found specification of procedure read~int
[2020-10-29 05:31:15,635 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc
[2020-10-29 05:31:25,316 INFO  L293             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2020-10-29 05:31:25,317 INFO  L298             CfgBuilder]: Removed 1 assume(true) statements.
[2020-10-29 05:31:25,323 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 05:31:25 BoogieIcfgContainer
[2020-10-29 05:31:25,323 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2020-10-29 05:31:25,327 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2020-10-29 05:31:25,327 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2020-10-29 05:31:25,330 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2020-10-29 05:31:25,331 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 05:31:10" (1/3) ...
[2020-10-29 05:31:25,332 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39049888 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 05:31:25, skipping insertion in model container
[2020-10-29 05:31:25,332 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:31:14" (2/3) ...
[2020-10-29 05:31:25,333 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39049888 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 05:31:25, skipping insertion in model container
[2020-10-29 05:31:25,333 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 05:31:25" (3/3) ...
[2020-10-29 05:31:25,334 INFO  L111   eAbstractionObserver]: Analyzing ICFG Problem05_label50.c
[2020-10-29 05:31:25,346 INFO  L164   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION
[2020-10-29 05:31:25,353 INFO  L176   ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2020-10-29 05:31:25,367 INFO  L253      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2020-10-29 05:31:25,412 INFO  L377      AbstractCegarLoop]: Interprodecural is true
[2020-10-29 05:31:25,413 INFO  L378      AbstractCegarLoop]: Hoare is true
[2020-10-29 05:31:25,413 INFO  L379      AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation
[2020-10-29 05:31:25,413 INFO  L380      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2020-10-29 05:31:25,413 INFO  L381      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2020-10-29 05:31:25,413 INFO  L382      AbstractCegarLoop]: Difference is false
[2020-10-29 05:31:25,413 INFO  L383      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2020-10-29 05:31:25,413 INFO  L387      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2020-10-29 05:31:25,472 INFO  L276                IsEmpty]: Start isEmpty. Operand 2226 states.
[2020-10-29 05:31:25,727 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 1704
[2020-10-29 05:31:25,727 INFO  L414         BasicCegarLoop]: Found error trace
[2020-10-29 05:31:25,730 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-10-29 05:31:25,731 INFO  L429      AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-10-29 05:31:25,741 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-10-29 05:31:25,743 INFO  L82        PathProgramCache]: Analyzing trace with hash 896557841, now seen corresponding path program 1 times
[2020-10-29 05:31:25,753 INFO  L162   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-10-29 05:31:25,753 INFO  L353   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [249565577]
[2020-10-29 05:31:25,755 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-10-29 05:31:26,781 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-29 05:31:27,222 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-29 05:31:32,082 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-10-29 05:31:32,082 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 1727
[2020-10-29 05:31:32,082 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-10-29 05:31:32,083 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 5293
[2020-10-29 05:31:32,086 FATAL L256   erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE
[2020-10-29 05:31:32,086 FATAL L256   erpolLogProxyWrapper]: Tolerance: 0.3
[2020-10-29 05:31:32,086 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 20
[2020-10-29 05:31:32,087 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 5
[2020-10-29 05:31:32,087 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 1718
[2020-10-29 05:31:32,087 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 3
[2020-10-29 05:31:33,789 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-10-29 05:31:33,807 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-29 05:31:33,814 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-29 05:31:33,849 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-10-29 05:31:33,849 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 8
[2020-10-29 05:31:33,850 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-10-29 05:31:33,850 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 40
[2020-10-29 05:31:33,850 FATAL L256   erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE
[2020-10-29 05:31:33,851 FATAL L256   erpolLogProxyWrapper]: Tolerance: 0.3
[2020-10-29 05:31:33,851 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 2
[2020-10-29 05:31:33,851 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 1
[2020-10-29 05:31:33,851 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 2
[2020-10-29 05:31:33,852 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-10-29 05:31:37,351 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-10-29 05:31:37,352 INFO  L353   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [249565577]
[2020-10-29 05:31:37,353 INFO  L219   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-10-29 05:31:37,354 INFO  L232   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-10-29 05:31:37,355 INFO  L155   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778455728]
[2020-10-29 05:31:37,364 INFO  L461      AbstractCegarLoop]: Interpolant automaton has 5 states
[2020-10-29 05:31:37,365 INFO  L142   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-10-29 05:31:37,377 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2020-10-29 05:31:37,378 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20
[2020-10-29 05:31:37,380 INFO  L87              Difference]: Start difference. First operand 2226 states. Second operand 5 states.
[2020-10-29 05:32:09,620 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-10-29 05:32:09,621 INFO  L93              Difference]: Finished difference Result 8116 states and 15421 transitions.
[2020-10-29 05:32:09,624 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2020-10-29 05:32:09,625 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 1703
[2020-10-29 05:32:09,633 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-10-29 05:32:09,694 INFO  L225             Difference]: With dead ends: 8116
[2020-10-29 05:32:09,694 INFO  L226             Difference]: Without dead ends: 5822
[2020-10-29 05:32:09,709 INFO  L677         BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42
[2020-10-29 05:32:09,739 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 5822 states.
[2020-10-29 05:32:09,944 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 5822 to 5770.
[2020-10-29 05:32:09,946 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 5770 states.
[2020-10-29 05:32:09,986 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5770 states to 5770 states and 10073 transitions.
[2020-10-29 05:32:09,989 INFO  L78                 Accepts]: Start accepts. Automaton has 5770 states and 10073 transitions. Word has length 1703
[2020-10-29 05:32:09,995 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-10-29 05:32:09,996 INFO  L481      AbstractCegarLoop]: Abstraction has 5770 states and 10073 transitions.
[2020-10-29 05:32:09,996 INFO  L482      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2020-10-29 05:32:09,997 INFO  L276                IsEmpty]: Start isEmpty. Operand 5770 states and 10073 transitions.
[2020-10-29 05:32:10,226 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 1713
[2020-10-29 05:32:10,227 INFO  L414         BasicCegarLoop]: Found error trace
[2020-10-29 05:32:10,228 INFO  L422         BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-10-29 05:32:10,229 WARN  L518      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2020-10-29 05:32:10,231 INFO  L429      AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-10-29 05:32:10,232 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-10-29 05:32:10,233 INFO  L82        PathProgramCache]: Analyzing trace with hash 2088839573, now seen corresponding path program 1 times
[2020-10-29 05:32:10,233 INFO  L162   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-10-29 05:32:10,233 INFO  L353   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1487389827]
[2020-10-29 05:32:10,234 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-10-29 05:32:10,403 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-29 05:32:10,434 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-29 05:32:12,571 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-29 05:32:15,540 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-10-29 05:32:15,540 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 1738
[2020-10-29 05:32:15,540 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 2
[2020-10-29 05:32:15,540 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 5132
[2020-10-29 05:32:15,541 FATAL L256   erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE
[2020-10-29 05:32:15,542 FATAL L256   erpolLogProxyWrapper]: Tolerance: 0.3
[2020-10-29 05:32:15,542 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 18
[2020-10-29 05:32:15,542 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 19
[2020-10-29 05:32:15,542 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 1715
[2020-10-29 05:32:15,542 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-10-29 05:32:17,551 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-10-29 05:32:17,559 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-29 05:32:17,561 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-29 05:32:17,568 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-10-29 05:32:17,568 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 8
[2020-10-29 05:32:17,569 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-10-29 05:32:17,569 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 7
[2020-10-29 05:32:17,569 FATAL L256   erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE
[2020-10-29 05:32:17,569 FATAL L256   erpolLogProxyWrapper]: Tolerance: 0.3
[2020-10-29 05:32:17,570 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-10-29 05:32:17,570 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 1
[2020-10-29 05:32:17,570 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-10-29 05:32:17,570 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-10-29 05:32:17,593 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8
[2020-10-29 05:32:17,602 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-29 05:32:17,606 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-29 05:32:17,618 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-10-29 05:32:17,619 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 10
[2020-10-29 05:32:17,619 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-10-29 05:32:17,620 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 15
[2020-10-29 05:32:17,620 FATAL L256   erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE
[2020-10-29 05:32:17,620 FATAL L256   erpolLogProxyWrapper]: Tolerance: 0.3
[2020-10-29 05:32:17,620 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 2
[2020-10-29 05:32:17,621 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 1
[2020-10-29 05:32:17,621 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 4
[2020-10-29 05:32:17,621 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-10-29 05:32:20,555 INFO  L134       CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-10-29 05:32:20,555 INFO  L353   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1487389827]
[2020-10-29 05:32:20,555 INFO  L219   FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-10-29 05:32:20,556 INFO  L232   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6
[2020-10-29 05:32:20,556 INFO  L155   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074521346]
[2020-10-29 05:32:20,560 INFO  L461      AbstractCegarLoop]: Interpolant automaton has 6 states
[2020-10-29 05:32:20,561 INFO  L142   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-10-29 05:32:20,561 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2020-10-29 05:32:20,561 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30
[2020-10-29 05:32:20,562 INFO  L87              Difference]: Start difference. First operand 5770 states and 10073 transitions. Second operand 6 states.
[2020-10-29 05:33:00,667 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-10-29 05:33:00,667 INFO  L93              Difference]: Finished difference Result 22157 states and 39678 transitions.
[2020-10-29 05:33:00,668 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2020-10-29 05:33:00,668 INFO  L78                 Accepts]: Start accepts. Automaton has 6 states. Word has length 1712
[2020-10-29 05:33:00,672 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-10-29 05:33:00,788 INFO  L225             Difference]: With dead ends: 22157
[2020-10-29 05:33:00,788 INFO  L226             Difference]: Without dead ends: 16393
[2020-10-29 05:33:00,810 INFO  L677         BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56
[2020-10-29 05:33:00,874 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 16393 states.
[2020-10-29 05:33:01,285 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 16393 to 16375.
[2020-10-29 05:33:01,286 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 16375 states.
[2020-10-29 05:33:01,333 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 16375 states to 16375 states and 25303 transitions.
[2020-10-29 05:33:01,333 INFO  L78                 Accepts]: Start accepts. Automaton has 16375 states and 25303 transitions. Word has length 1712
[2020-10-29 05:33:01,337 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-10-29 05:33:01,337 INFO  L481      AbstractCegarLoop]: Abstraction has 16375 states and 25303 transitions.
[2020-10-29 05:33:01,337 INFO  L482      AbstractCegarLoop]: Interpolant automaton has 6 states.
[2020-10-29 05:33:01,337 INFO  L276                IsEmpty]: Start isEmpty. Operand 16375 states and 25303 transitions.
[2020-10-29 05:33:01,411 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 1731
[2020-10-29 05:33:01,411 INFO  L414         BasicCegarLoop]: Found error trace
[2020-10-29 05:33:01,413 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-10-29 05:33:01,413 WARN  L518      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2020-10-29 05:33:01,413 INFO  L429      AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-10-29 05:33:01,415 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-10-29 05:33:01,415 INFO  L82        PathProgramCache]: Analyzing trace with hash -1626122080, now seen corresponding path program 1 times
[2020-10-29 05:33:01,416 INFO  L162   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-10-29 05:33:01,416 INFO  L353   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [193802896]
[2020-10-29 05:33:01,417 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-10-29 05:33:01,556 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-29 05:33:01,589 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-29 05:33:01,908 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-29 05:33:06,637 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-10-29 05:33:06,637 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 1756
[2020-10-29 05:33:06,637 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 2
[2020-10-29 05:33:06,638 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 5077
[2020-10-29 05:33:06,638 FATAL L256   erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE
[2020-10-29 05:33:06,638 FATAL L256   erpolLogProxyWrapper]: Tolerance: 0.3
[2020-10-29 05:33:06,638 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 32
[2020-10-29 05:33:06,639 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 37
[2020-10-29 05:33:06,640 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 1244
[2020-10-29 05:33:06,640 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 2
[2020-10-29 05:33:14,482 WARN  L193               SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 51
[2020-10-29 05:33:14,726 WARN  L193               SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 49
[2020-10-29 05:33:14,974 WARN  L193               SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 49
[2020-10-29 05:33:15,215 WARN  L193               SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 48
[2020-10-29 05:33:15,448 WARN  L193               SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 48
[2020-10-29 05:33:15,686 WARN  L193               SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 48
[2020-10-29 05:33:15,937 WARN  L193               SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 48
[2020-10-29 05:33:16,200 WARN  L193               SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 48
[2020-10-29 05:33:16,517 WARN  L193               SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 49
[2020-10-29 05:33:16,893 WARN  L193               SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 49
[2020-10-29 05:33:17,307 WARN  L193               SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 49
[2020-10-29 05:33:17,714 WARN  L193               SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 44
[2020-10-29 05:33:18,072 WARN  L193               SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 40
[2020-10-29 05:33:18,332 WARN  L193               SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 34
[2020-10-29 05:33:18,731 WARN  L193               SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 33
[2020-10-29 05:33:18,937 WARN  L193               SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 34
[2020-10-29 05:33:19,062 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-10-29 05:33:19,066 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-29 05:33:19,068 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-29 05:33:19,073 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-10-29 05:33:19,074 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 8
[2020-10-29 05:33:19,074 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-10-29 05:33:19,074 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 6
[2020-10-29 05:33:19,074 FATAL L256   erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE
[2020-10-29 05:33:19,074 FATAL L256   erpolLogProxyWrapper]: Tolerance: 0.3
[2020-10-29 05:33:19,075 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-10-29 05:33:19,075 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 1
[2020-10-29 05:33:19,075 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-10-29 05:33:19,075 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-10-29 05:33:19,134 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8
[2020-10-29 05:33:19,144 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-29 05:33:19,150 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-29 05:33:19,179 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-10-29 05:33:19,179 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 28
[2020-10-29 05:33:19,179 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-10-29 05:33:19,179 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 34
[2020-10-29 05:33:19,180 FATAL L256   erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE
[2020-10-29 05:33:19,180 FATAL L256   erpolLogProxyWrapper]: Tolerance: 0.3
[2020-10-29 05:33:19,180 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 2
[2020-10-29 05:33:19,180 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 1
[2020-10-29 05:33:19,180 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 22
[2020-10-29 05:33:19,181 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-10-29 05:33:47,854 INFO  L134       CoverageAnalysis]: Checked inductivity of 24 backedges. 23 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-10-29 05:33:47,854 INFO  L353   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [193802896]
[2020-10-29 05:33:47,855 INFO  L219   FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-10-29 05:33:47,855 INFO  L232   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23
[2020-10-29 05:33:47,855 INFO  L155   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524381377]
[2020-10-29 05:33:47,857 INFO  L461      AbstractCegarLoop]: Interpolant automaton has 23 states
[2020-10-29 05:33:47,857 INFO  L142   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-10-29 05:33:47,862 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants.
[2020-10-29 05:33:47,863 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506
[2020-10-29 05:33:47,863 INFO  L87              Difference]: Start difference. First operand 16375 states and 25303 transitions. Second operand 23 states.
[2020-10-29 05:33:48,761 WARN  L193               SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 113
[2020-10-29 05:33:49,090 WARN  L193               SmtUtils]: Spent 255.00 ms on a formula simplification that was a NOOP. DAG size: 131
[2020-10-29 05:33:51,131 WARN  L193               SmtUtils]: Spent 257.00 ms on a formula simplification that was a NOOP. DAG size: 130
[2020-10-29 05:33:58,947 WARN  L193               SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 112
[2020-10-29 05:33:59,265 WARN  L193               SmtUtils]: Spent 248.00 ms on a formula simplification that was a NOOP. DAG size: 129
[2020-10-29 05:34:08,555 WARN  L193               SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 112
[2020-10-29 05:34:08,872 WARN  L193               SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 129
[2020-10-29 05:34:18,886 WARN  L193               SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 113
[2020-10-29 05:34:19,224 WARN  L193               SmtUtils]: Spent 261.00 ms on a formula simplification that was a NOOP. DAG size: 130
[2020-10-29 05:34:21,591 WARN  L193               SmtUtils]: Spent 475.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 123
[2020-10-29 05:34:22,399 WARN  L193               SmtUtils]: Spent 457.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 119
[2020-10-29 05:34:23,689 WARN  L193               SmtUtils]: Spent 432.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 116
[2020-10-29 05:34:24,683 WARN  L193               SmtUtils]: Spent 423.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 114
[2020-10-29 05:34:31,137 WARN  L193               SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 96
[2020-10-29 05:34:31,380 WARN  L193               SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 99
[2020-10-29 05:34:41,117 WARN  L193               SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 97
[2020-10-29 05:34:41,376 WARN  L193               SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 101
[2020-10-29 05:34:56,447 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-10-29 05:34:56,447 INFO  L93              Difference]: Finished difference Result 34031 states and 53224 transitions.
[2020-10-29 05:34:56,449 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. 
[2020-10-29 05:34:56,449 INFO  L78                 Accepts]: Start accepts. Automaton has 23 states. Word has length 1730
[2020-10-29 05:34:56,452 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-10-29 05:34:56,510 INFO  L225             Difference]: With dead ends: 34031
[2020-10-29 05:34:56,510 INFO  L226             Difference]: Without dead ends: 17662
[2020-10-29 05:34:56,552 INFO  L677         BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=219, Invalid=1341, Unknown=0, NotChecked=0, Total=1560
[2020-10-29 05:34:56,574 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 17662 states.
[2020-10-29 05:34:56,940 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 17662 to 17650.
[2020-10-29 05:34:56,941 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 17650 states.
[2020-10-29 05:34:56,980 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 17650 states to 17650 states and 26604 transitions.
[2020-10-29 05:34:56,981 INFO  L78                 Accepts]: Start accepts. Automaton has 17650 states and 26604 transitions. Word has length 1730
[2020-10-29 05:34:56,982 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-10-29 05:34:56,983 INFO  L481      AbstractCegarLoop]: Abstraction has 17650 states and 26604 transitions.
[2020-10-29 05:34:56,983 INFO  L482      AbstractCegarLoop]: Interpolant automaton has 23 states.
[2020-10-29 05:34:56,983 INFO  L276                IsEmpty]: Start isEmpty. Operand 17650 states and 26604 transitions.
[2020-10-29 05:34:57,058 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 1810
[2020-10-29 05:34:57,059 INFO  L414         BasicCegarLoop]: Found error trace
[2020-10-29 05:34:57,060 INFO  L422         BasicCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-10-29 05:34:57,061 WARN  L518      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2020-10-29 05:34:57,061 INFO  L429      AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-10-29 05:34:57,061 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-10-29 05:34:57,062 INFO  L82        PathProgramCache]: Analyzing trace with hash -1024367637, now seen corresponding path program 1 times
[2020-10-29 05:34:57,063 INFO  L162   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-10-29 05:34:57,063 INFO  L353   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1547444995]
[2020-10-29 05:34:57,063 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-10-29 05:34:57,202 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-29 05:34:57,231 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-29 05:34:57,389 FATAL L256   erpolLogProxyWrapper]: Now shrinking...