/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=DEEPEST --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_label27.c


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


This is Ultimate 0.2.0-0f64333
[2020-10-27 16:13:50,885 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2020-10-27 16:13:50,888 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2020-10-27 16:13:50,944 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2020-10-27 16:13:50,945 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2020-10-27 16:13:50,953 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2020-10-27 16:13:50,955 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2020-10-27 16:13:50,961 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2020-10-27 16:13:50,965 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2020-10-27 16:13:50,971 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
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[2020-10-27 16:13:50,974 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2020-10-27 16:13:50,975 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2020-10-27 16:13:50,978 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2020-10-27 16:13:50,982 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2020-10-27 16:13:50,985 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2020-10-27 16:13:50,986 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2020-10-27 16:13:50,989 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2020-10-27 16:13:50,993 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2020-10-27 16:13:50,996 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2020-10-27 16:13:51,001 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2020-10-27 16:13:51,003 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2020-10-27 16:13:51,005 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2020-10-27 16:13:51,007 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2020-10-27 16:13:51,031 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2020-10-27 16:13:51,032 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2020-10-27 16:13:51,032 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2020-10-27 16:13:51,035 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2020-10-27 16:13:51,036 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2020-10-27 16:13:51,037 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2020-10-27 16:13:51,038 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2020-10-27 16:13:51,039 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2020-10-27 16:13:51,041 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2020-10-27 16:13:51,042 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2020-10-27 16:13:51,043 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2020-10-27 16:13:51,043 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
[2020-10-27 16:13:51,044 INFO  L184        SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2020-10-27 16:13:51,044 INFO  L184        SettingsManager]: ReqParser provides no preferences, ignoring...
[2020-10-27 16:13:51,045 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
[2020-10-27 16:13:51,046 INFO  L181        SettingsManager]: Resetting Witness Parser preferences to default values
[2020-10-27 16:13:51,047 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2020-10-27 16:13:51,054 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
[2020-10-27 16:13:51,112 INFO  L113        SettingsManager]: Loading preferences was successful
[2020-10-27 16:13:51,113 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2020-10-27 16:13:51,117 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2020-10-27 16:13:51,118 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2020-10-27 16:13:51,118 INFO  L138        SettingsManager]:  * Use SBE=true
[2020-10-27 16:13:51,118 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2020-10-27 16:13:51,119 INFO  L138        SettingsManager]:  * sizeof long=4
[2020-10-27 16:13:51,119 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2020-10-27 16:13:51,119 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2020-10-27 16:13:51,119 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2020-10-27 16:13:51,120 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2020-10-27 16:13:51,121 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2020-10-27 16:13:51,121 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2020-10-27 16:13:51,121 INFO  L138        SettingsManager]:  * sizeof long double=12
[2020-10-27 16:13:51,121 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2020-10-27 16:13:51,122 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2020-10-27 16:13:51,122 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2020-10-27 16:13:51,122 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2020-10-27 16:13:51,122 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2020-10-27 16:13:51,123 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2020-10-27 16:13:51,123 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2020-10-27 16:13:51,123 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-10-27 16:13:51,123 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2020-10-27 16:13:51,123 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2020-10-27 16:13:51,124 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2020-10-27 16:13:51,124 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2020-10-27 16:13:51,124 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-10-27 16:13:51,124 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2020-10-27 16:13:51,125 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2020-10-27 16:13:51,125 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$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true;
[2020-10-27 16:13:51,562 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2020-10-27 16:13:51,616 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2020-10-27 16:13:51,619 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2020-10-27 16:13:51,621 INFO  L271        PluginConnector]: Initializing CDTParser...
[2020-10-27 16:13:51,622 INFO  L275        PluginConnector]: CDTParser initialized
[2020-10-27 16:13:51,623 INFO  L432   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem05_label27.c
[2020-10-27 16:13:51,720 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6d8e0f04f/dd8c5fed94d54268b47ec26f5915a759/FLAG459f93b81
[2020-10-27 16:13:52,993 INFO  L306              CDTParser]: Found 1 translation units.
[2020-10-27 16:13:52,994 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem05_label27.c
[2020-10-27 16:13:53,054 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6d8e0f04f/dd8c5fed94d54268b47ec26f5915a759/FLAG459f93b81
[2020-10-27 16:13:53,262 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6d8e0f04f/dd8c5fed94d54268b47ec26f5915a759
[2020-10-27 16:13:53,266 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2020-10-27 16:13:53,277 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2020-10-27 16:13:53,281 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2020-10-27 16:13:53,281 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2020-10-27 16:13:53,287 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2020-10-27 16:13:53,288 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 04:13:53" (1/1) ...
[2020-10-27 16:13:53,291 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1240fbe6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:13:53, skipping insertion in model container
[2020-10-27 16:13:53,292 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 04:13:53" (1/1) ...
[2020-10-27 16:13:53,300 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2020-10-27 16:13:53,536 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2020-10-27 16:13:55,654 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-10-27 16:13:55,672 INFO  L203         MainTranslator]: Completed pre-run
[2020-10-27 16:13:56,884 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-10-27 16:13:56,950 INFO  L208         MainTranslator]: Completed translation
[2020-10-27 16:13:56,951 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:13:56 WrapperNode
[2020-10-27 16:13:56,951 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2020-10-27 16:13:56,952 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2020-10-27 16:13:56,952 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2020-10-27 16:13:56,952 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2020-10-27 16:13:56,963 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:13:56" (1/1) ...
[2020-10-27 16:13:56,963 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:13:56" (1/1) ...
[2020-10-27 16:13:57,071 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:13:56" (1/1) ...
[2020-10-27 16:13:57,072 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:13:56" (1/1) ...
[2020-10-27 16:13:57,339 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:13:56" (1/1) ...
[2020-10-27 16:13:57,409 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:13:56" (1/1) ...
[2020-10-27 16:13:57,593 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:13:56" (1/1) ...
[2020-10-27 16:13:57,698 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2020-10-27 16:13:57,701 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2020-10-27 16:13:57,701 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2020-10-27 16:13:57,701 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2020-10-27 16:13:57,702 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:13:56" (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
[2020-10-27 16:13:57,791 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2020-10-27 16:13:57,791 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2020-10-27 16:13:57,792 INFO  L138     BoogieDeclarations]: Found implementation of procedure reach_error
[2020-10-27 16:13:57,792 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output
[2020-10-27 16:13:57,792 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output2
[2020-10-27 16:13:57,792 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output3
[2020-10-27 16:13:57,793 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output4
[2020-10-27 16:13:57,793 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output5
[2020-10-27 16:13:57,793 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output6
[2020-10-27 16:13:57,793 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output7
[2020-10-27 16:13:57,794 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output8
[2020-10-27 16:13:57,794 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2020-10-27 16:13:57,794 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output
[2020-10-27 16:13:57,795 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output2
[2020-10-27 16:13:57,795 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output3
[2020-10-27 16:13:57,796 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output4
[2020-10-27 16:13:57,796 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output5
[2020-10-27 16:13:57,796 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output6
[2020-10-27 16:13:57,796 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output7
[2020-10-27 16:13:57,797 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output8
[2020-10-27 16:13:57,797 INFO  L130     BoogieDeclarations]: Found specification of procedure abort
[2020-10-27 16:13:57,797 INFO  L130     BoogieDeclarations]: Found specification of procedure __assert_fail
[2020-10-27 16:13:57,798 INFO  L130     BoogieDeclarations]: Found specification of procedure reach_error
[2020-10-27 16:13:57,798 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack
[2020-10-27 16:13:57,798 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int
[2020-10-27 16:13:57,798 INFO  L130     BoogieDeclarations]: Found specification of procedure exit
[2020-10-27 16:13:57,798 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2020-10-27 16:13:57,798 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2020-10-27 16:13:57,798 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~int
[2020-10-27 16:13:57,799 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2020-10-27 16:13:57,799 INFO  L130     BoogieDeclarations]: Found specification of procedure write~int
[2020-10-27 16:13:57,799 INFO  L130     BoogieDeclarations]: Found specification of procedure read~int
[2020-10-27 16:13:57,799 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc
[2020-10-27 16:14:08,174 INFO  L293             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2020-10-27 16:14:08,174 INFO  L298             CfgBuilder]: Removed 1 assume(true) statements.
[2020-10-27 16:14:08,179 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 04:14:08 BoogieIcfgContainer
[2020-10-27 16:14:08,179 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2020-10-27 16:14:08,181 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2020-10-27 16:14:08,181 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2020-10-27 16:14:08,185 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2020-10-27 16:14:08,185 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 04:13:53" (1/3) ...
[2020-10-27 16:14:08,186 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14a4394e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 04:14:08, skipping insertion in model container
[2020-10-27 16:14:08,187 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:13:56" (2/3) ...
[2020-10-27 16:14:08,187 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14a4394e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 04:14:08, skipping insertion in model container
[2020-10-27 16:14:08,187 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 04:14:08" (3/3) ...
[2020-10-27 16:14:08,189 INFO  L111   eAbstractionObserver]: Analyzing ICFG Problem05_label27.c
[2020-10-27 16:14:08,202 INFO  L164   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION
[2020-10-27 16:14:08,209 INFO  L176   ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2020-10-27 16:14:08,224 INFO  L253      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2020-10-27 16:14:08,265 INFO  L377      AbstractCegarLoop]: Interprodecural is true
[2020-10-27 16:14:08,266 INFO  L378      AbstractCegarLoop]: Hoare is true
[2020-10-27 16:14:08,266 INFO  L379      AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation
[2020-10-27 16:14:08,266 INFO  L380      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2020-10-27 16:14:08,266 INFO  L381      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2020-10-27 16:14:08,266 INFO  L382      AbstractCegarLoop]: Difference is false
[2020-10-27 16:14:08,266 INFO  L383      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2020-10-27 16:14:08,267 INFO  L387      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2020-10-27 16:14:08,319 INFO  L276                IsEmpty]: Start isEmpty. Operand 2226 states.
[2020-10-27 16:14:08,453 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 1690
[2020-10-27 16:14:08,453 INFO  L414         BasicCegarLoop]: Found error trace
[2020-10-27 16:14:08,456 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]
[2020-10-27 16:14:08,457 INFO  L429      AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-10-27 16:14:08,464 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-10-27 16:14:08,466 INFO  L82        PathProgramCache]: Analyzing trace with hash 749071769, now seen corresponding path program 1 times
[2020-10-27 16:14:08,476 INFO  L162   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-10-27 16:14:08,477 INFO  L353   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1600163106]
[2020-10-27 16:14:08,478 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-10-27 16:14:09,565 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-27 16:14:10,307 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-27 16:14:14,821 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-10-27 16:14:14,821 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 1713
[2020-10-27 16:14:14,822 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-10-27 16:14:14,822 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 5245
[2020-10-27 16:14:14,824 FATAL L256   erpolLogProxyWrapper]: Heuristic: DEEPEST
[2020-10-27 16:14:14,825 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 20
[2020-10-27 16:14:14,825 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 5
[2020-10-27 16:14:14,825 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 1704
[2020-10-27 16:14:14,825 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 3
[2020-10-27 16:14:16,569 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-10-27 16:14:16,595 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-27 16:14:16,608 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-27 16:14:16,640 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-10-27 16:14:16,640 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 8
[2020-10-27 16:14:16,640 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-10-27 16:14:16,640 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 43
[2020-10-27 16:14:16,641 FATAL L256   erpolLogProxyWrapper]: Heuristic: DEEPEST
[2020-10-27 16:14:16,641 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 2
[2020-10-27 16:14:16,641 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 1
[2020-10-27 16:14:16,641 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 2
[2020-10-27 16:14:16,642 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-10-27 16:14:20,432 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-10-27 16:14:20,432 INFO  L353   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1600163106]
[2020-10-27 16:14:20,434 INFO  L219   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-10-27 16:14:20,435 INFO  L232   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-10-27 16:14:20,435 INFO  L155   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644679918]
[2020-10-27 16:14:20,446 INFO  L461      AbstractCegarLoop]: Interpolant automaton has 5 states
[2020-10-27 16:14:20,446 INFO  L142   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-10-27 16:14:20,462 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2020-10-27 16:14:20,463 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20
[2020-10-27 16:14:20,465 INFO  L87              Difference]: Start difference. First operand 2226 states. Second operand 5 states.
[2020-10-27 16:14:20,618 WARN  L193               SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 75
[2020-10-27 16:14:51,742 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-10-27 16:14:51,743 INFO  L93              Difference]: Finished difference Result 8284 states and 15705 transitions.
[2020-10-27 16:14:51,744 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2020-10-27 16:14:51,745 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 1689
[2020-10-27 16:14:51,755 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-10-27 16:14:51,818 INFO  L225             Difference]: With dead ends: 8284
[2020-10-27 16:14:51,818 INFO  L226             Difference]: Without dead ends: 5990
[2020-10-27 16:14:51,831 INFO  L677         BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42
[2020-10-27 16:14:51,860 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 5990 states.
[2020-10-27 16:14:52,064 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 5990 to 5834.
[2020-10-27 16:14:52,066 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 5834 states.
[2020-10-27 16:14:52,100 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5834 states to 5834 states and 10150 transitions.
[2020-10-27 16:14:52,102 INFO  L78                 Accepts]: Start accepts. Automaton has 5834 states and 10150 transitions. Word has length 1689
[2020-10-27 16:14:52,107 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-10-27 16:14:52,107 INFO  L481      AbstractCegarLoop]: Abstraction has 5834 states and 10150 transitions.
[2020-10-27 16:14:52,107 INFO  L482      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2020-10-27 16:14:52,107 INFO  L276                IsEmpty]: Start isEmpty. Operand 5834 states and 10150 transitions.
[2020-10-27 16:14:52,396 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 1723
[2020-10-27 16:14:52,397 INFO  L414         BasicCegarLoop]: Found error trace
[2020-10-27 16:14:52,399 INFO  L422         BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 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, 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]
[2020-10-27 16:14:52,400 WARN  L518      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2020-10-27 16:14:52,400 INFO  L429      AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-10-27 16:14:52,403 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-10-27 16:14:52,404 INFO  L82        PathProgramCache]: Analyzing trace with hash 516131992, now seen corresponding path program 1 times
[2020-10-27 16:14:52,404 INFO  L162   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-10-27 16:14:52,404 INFO  L353   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [79471837]
[2020-10-27 16:14:52,405 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-10-27 16:14:52,574 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-27 16:14:52,605 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-27 16:14:52,732 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-27 16:14:57,655 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-10-27 16:14:57,656 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 1750
[2020-10-27 16:14:57,656 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 2
[2020-10-27 16:14:57,656 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 5077
[2020-10-27 16:14:57,657 FATAL L256   erpolLogProxyWrapper]: Heuristic: DEEPEST
[2020-10-27 16:14:57,657 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 4
[2020-10-27 16:14:57,657 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 22
[2020-10-27 16:14:57,658 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 24
[2020-10-27 16:14:57,658 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-10-27 16:14:58,683 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-10-27 16:14:58,690 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-27 16:14:58,692 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-27 16:14:58,704 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-10-27 16:14:58,704 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 8
[2020-10-27 16:14:58,704 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-10-27 16:14:58,705 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 12
[2020-10-27 16:14:58,705 FATAL L256   erpolLogProxyWrapper]: Heuristic: DEEPEST
[2020-10-27 16:14:58,705 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-10-27 16:14:58,705 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 1
[2020-10-27 16:14:58,706 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-10-27 16:14:58,706 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-10-27 16:14:58,727 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8
[2020-10-27 16:14:58,734 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-27 16:14:58,740 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-27 16:14:58,753 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-10-27 16:14:58,753 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 13
[2020-10-27 16:14:58,753 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-10-27 16:14:58,754 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 17
[2020-10-27 16:14:58,754 FATAL L256   erpolLogProxyWrapper]: Heuristic: DEEPEST
[2020-10-27 16:14:58,755 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 2
[2020-10-27 16:14:58,755 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 1
[2020-10-27 16:14:58,755 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 7
[2020-10-27 16:14:58,755 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-10-27 16:14:58,769 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20
[2020-10-27 16:14:58,783 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-27 16:14:58,788 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-27 16:14:58,829 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-10-27 16:14:58,830 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 22
[2020-10-27 16:14:58,830 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-10-27 16:14:58,830 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 46
[2020-10-27 16:14:58,831 FATAL L256   erpolLogProxyWrapper]: Heuristic: DEEPEST
[2020-10-27 16:14:58,831 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 4
[2020-10-27 16:14:58,831 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 0
[2020-10-27 16:14:58,831 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 22
[2020-10-27 16:14:58,831 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-10-27 16:15:00,340 INFO  L134       CoverageAnalysis]: Checked inductivity of 39 backedges. 36 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2020-10-27 16:15:00,341 INFO  L353   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [79471837]
[2020-10-27 16:15:00,341 INFO  L219   FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-10-27 16:15:00,342 INFO  L232   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8
[2020-10-27 16:15:00,342 INFO  L155   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782938429]
[2020-10-27 16:15:00,346 INFO  L461      AbstractCegarLoop]: Interpolant automaton has 8 states
[2020-10-27 16:15:00,346 INFO  L142   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-10-27 16:15:00,347 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2020-10-27 16:15:00,347 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56
[2020-10-27 16:15:00,348 INFO  L87              Difference]: Start difference. First operand 5834 states and 10150 transitions. Second operand 8 states.
[2020-10-27 16:15:37,546 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-10-27 16:15:37,547 INFO  L93              Difference]: Finished difference Result 22640 states and 40696 transitions.
[2020-10-27 16:15:37,548 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. 
[2020-10-27 16:15:37,548 INFO  L78                 Accepts]: Start accepts. Automaton has 8 states. Word has length 1722
[2020-10-27 16:15:37,549 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-10-27 16:15:37,656 INFO  L225             Difference]: With dead ends: 22640
[2020-10-27 16:15:37,656 INFO  L226             Difference]: Without dead ends: 16812
[2020-10-27 16:15:37,680 INFO  L677         BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240
[2020-10-27 16:15:37,699 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 16812 states.
[2020-10-27 16:15:38,183 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 16812 to 16715.
[2020-10-27 16:15:38,184 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 16715 states.
[2020-10-27 16:15:38,236 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 16715 states to 16715 states and 26044 transitions.
[2020-10-27 16:15:38,236 INFO  L78                 Accepts]: Start accepts. Automaton has 16715 states and 26044 transitions. Word has length 1722
[2020-10-27 16:15:38,237 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-10-27 16:15:38,237 INFO  L481      AbstractCegarLoop]: Abstraction has 16715 states and 26044 transitions.
[2020-10-27 16:15:38,237 INFO  L482      AbstractCegarLoop]: Interpolant automaton has 8 states.
[2020-10-27 16:15:38,237 INFO  L276                IsEmpty]: Start isEmpty. Operand 16715 states and 26044 transitions.
[2020-10-27 16:15:38,326 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 1817
[2020-10-27 16:15:38,326 INFO  L414         BasicCegarLoop]: Found error trace
[2020-10-27 16:15:38,328 INFO  L422         BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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]
[2020-10-27 16:15:38,329 WARN  L518      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2020-10-27 16:15:38,329 INFO  L429      AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-10-27 16:15:38,329 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-10-27 16:15:38,330 INFO  L82        PathProgramCache]: Analyzing trace with hash -604454094, now seen corresponding path program 1 times
[2020-10-27 16:15:38,331 INFO  L162   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-10-27 16:15:38,331 INFO  L353   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1631781872]
[2020-10-27 16:15:38,331 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-10-27 16:15:38,487 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-27 16:15:38,526 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-27 16:15:38,648 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-27 16:15:43,930 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-10-27 16:15:43,932 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 1844
[2020-10-27 16:15:43,932 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 2
[2020-10-27 16:15:43,932 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 5438
[2020-10-27 16:15:43,932 FATAL L256   erpolLogProxyWrapper]: Heuristic: DEEPEST
[2020-10-27 16:15:43,933 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 4
[2020-10-27 16:15:43,933 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 50
[2020-10-27 16:15:43,933 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 90
[2020-10-27 16:15:43,933 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-10-27 16:15:44,796 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-10-27 16:15:44,798 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-27 16:15:44,802 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-27 16:15:44,816 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-10-27 16:15:44,816 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 8
[2020-10-27 16:15:44,817 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-10-27 16:15:44,817 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 15
[2020-10-27 16:15:44,817 FATAL L256   erpolLogProxyWrapper]: Heuristic: DEEPEST
[2020-10-27 16:15:44,817 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-10-27 16:15:44,817 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 1
[2020-10-27 16:15:44,818 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-10-27 16:15:44,818 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-10-27 16:15:44,840 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8
[2020-10-27 16:15:44,851 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-27 16:15:44,860 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-27 16:15:44,913 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-10-27 16:15:44,914 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 41
[2020-10-27 16:15:44,914 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-10-27 16:15:44,914 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 61
[2020-10-27 16:15:44,914 FATAL L256   erpolLogProxyWrapper]: Heuristic: DEEPEST
[2020-10-27 16:15:44,915 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 2
[2020-10-27 16:15:44,915 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 1
[2020-10-27 16:15:44,915 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 35
[2020-10-27 16:15:44,915 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-10-27 16:15:44,929 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48
[2020-10-27 16:15:44,950 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-27 16:15:44,966 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-27 16:15:45,103 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-10-27 16:15:45,103 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 88
[2020-10-27 16:15:45,103 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-10-27 16:15:45,104 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 151
[2020-10-27 16:15:45,104 FATAL L256   erpolLogProxyWrapper]: Heuristic: DEEPEST
[2020-10-27 16:15:45,104 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 4
[2020-10-27 16:15:45,104 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 0
[2020-10-27 16:15:45,105 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 88
[2020-10-27 16:15:45,109 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 5
[2020-10-27 16:15:47,024 INFO  L134       CoverageAnalysis]: Checked inductivity of 161 backedges. 158 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2020-10-27 16:15:47,024 INFO  L353   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1631781872]
[2020-10-27 16:15:47,024 INFO  L219   FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-10-27 16:15:47,025 INFO  L232   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7
[2020-10-27 16:15:47,025 INFO  L155   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893530742]
[2020-10-27 16:15:47,027 INFO  L461      AbstractCegarLoop]: Interpolant automaton has 7 states
[2020-10-27 16:15:47,028 INFO  L142   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-10-27 16:15:47,028 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2020-10-27 16:15:47,028 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42
[2020-10-27 16:15:47,028 INFO  L87              Difference]: Start difference. First operand 16715 states and 26044 transitions. Second operand 7 states.
[2020-10-27 16:16:13,395 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-10-27 16:16:13,396 INFO  L93              Difference]: Finished difference Result 50805 states and 84376 transitions.
[2020-10-27 16:16:13,397 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2020-10-27 16:16:13,397 INFO  L78                 Accepts]: Start accepts. Automaton has 7 states. Word has length 1816
[2020-10-27 16:16:13,398 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-10-27 16:16:13,541 INFO  L225             Difference]: With dead ends: 50805
[2020-10-27 16:16:13,541 INFO  L226             Difference]: Without dead ends: 34096
[2020-10-27 16:16:13,607 INFO  L677         BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132
[2020-10-27 16:16:13,647 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 34096 states.
[2020-10-27 16:16:14,762 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 34096 to 33681.
[2020-10-27 16:16:14,762 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 33681 states.
[2020-10-27 16:16:14,860 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 33681 states to 33681 states and 50899 transitions.
[2020-10-27 16:16:14,860 INFO  L78                 Accepts]: Start accepts. Automaton has 33681 states and 50899 transitions. Word has length 1816
[2020-10-27 16:16:14,861 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-10-27 16:16:14,861 INFO  L481      AbstractCegarLoop]: Abstraction has 33681 states and 50899 transitions.
[2020-10-27 16:16:14,861 INFO  L482      AbstractCegarLoop]: Interpolant automaton has 7 states.
[2020-10-27 16:16:14,862 INFO  L276                IsEmpty]: Start isEmpty. Operand 33681 states and 50899 transitions.
[2020-10-27 16:16:15,016 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 1819
[2020-10-27 16:16:15,016 INFO  L414         BasicCegarLoop]: Found error trace
[2020-10-27 16:16:15,018 INFO  L422         BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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]
[2020-10-27 16:16:15,018 WARN  L518      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2020-10-27 16:16:15,018 INFO  L429      AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-10-27 16:16:15,019 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-10-27 16:16:15,021 INFO  L82        PathProgramCache]: Analyzing trace with hash -1309758405, now seen corresponding path program 1 times
[2020-10-27 16:16:15,021 INFO  L162   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-10-27 16:16:15,022 INFO  L353   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [226753573]
[2020-10-27 16:16:15,023 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-10-27 16:16:15,193 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-27 16:16:15,258 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-27 16:16:15,423 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-27 16:16:15,845 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-27 16:16:20,345 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-10-27 16:16:20,346 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 1846
[2020-10-27 16:16:20,346 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 3
[2020-10-27 16:16:20,346 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 5146
[2020-10-27 16:16:20,346 FATAL L256   erpolLogProxyWrapper]: Heuristic: DEEPEST
[2020-10-27 16:16:20,347 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 2
[2020-10-27 16:16:20,347 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 139
[2020-10-27 16:16:20,347 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 2
[2020-10-27 16:16:20,347 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-10-27 16:16:20,911 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-10-27 16:16:20,914 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-27 16:16:20,915 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-27 16:16:20,921 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-10-27 16:16:20,922 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 8
[2020-10-27 16:16:20,922 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-10-27 16:16:20,922 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 7
[2020-10-27 16:16:20,923 FATAL L256   erpolLogProxyWrapper]: Heuristic: DEEPEST
[2020-10-27 16:16:20,923 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-10-27 16:16:20,923 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 1
[2020-10-27 16:16:20,923 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-10-27 16:16:20,924 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-10-27 16:16:20,945 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8
[2020-10-27 16:16:20,950 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-27 16:16:20,951 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-27 16:16:20,967 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-10-27 16:16:20,968 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 33
[2020-10-27 16:16:20,968 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-10-27 16:16:20,968 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 17
[2020-10-27 16:16:20,968 FATAL L256   erpolLogProxyWrapper]: Heuristic: DEEPEST
[2020-10-27 16:16:20,969 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-10-27 16:16:20,969 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 1
[2020-10-27 16:16:20,969 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-10-27 16:16:20,969 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-10-27 16:16:20,981 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40
[2020-10-27 16:16:21,008 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-27 16:16:21,028 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-27 16:16:21,124 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-10-27 16:16:21,125 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 98
[2020-10-27 16:16:21,125 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-10-27 16:16:21,125 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 115
[2020-10-27 16:16:21,125 FATAL L256   erpolLogProxyWrapper]: Heuristic: DEEPEST
[2020-10-27 16:16:21,126 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 2
[2020-10-27 16:16:21,126 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 90
[2020-10-27 16:16:21,126 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 2
[2020-10-27 16:16:21,126 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-10-27 16:16:22,593 INFO  L134       CoverageAnalysis]: Checked inductivity of 153 backedges. 124 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked.
[2020-10-27 16:16:22,593 INFO  L353   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [226753573]
[2020-10-27 16:16:22,594 INFO  L219   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-10-27 16:16:22,594 INFO  L232   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2020-10-27 16:16:22,594 INFO  L155   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24911423]
[2020-10-27 16:16:22,596 INFO  L461      AbstractCegarLoop]: Interpolant automaton has 5 states
[2020-10-27 16:16:22,596 INFO  L142   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-10-27 16:16:22,597 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2020-10-27 16:16:22,597 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20
[2020-10-27 16:16:22,598 INFO  L87              Difference]: Start difference. First operand 33681 states and 50899 transitions. Second operand 5 states.
[2020-10-27 16:16:47,277 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-10-27 16:16:47,277 INFO  L93              Difference]: Finished difference Result 67375 states and 101956 transitions.
[2020-10-27 16:16:47,278 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2020-10-27 16:16:47,278 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 1818
[2020-10-27 16:16:47,279 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-10-27 16:16:47,401 INFO  L225             Difference]: With dead ends: 67375
[2020-10-27 16:16:47,402 INFO  L226             Difference]: Without dead ends: 33700
[2020-10-27 16:16:47,476 INFO  L677         BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30
[2020-10-27 16:16:47,512 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 33700 states.
[2020-10-27 16:16:48,269 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 33700 to 33677.
[2020-10-27 16:16:48,269 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 33677 states.
[2020-10-27 16:16:48,359 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 33677 states to 33677 states and 50891 transitions.
[2020-10-27 16:16:48,360 INFO  L78                 Accepts]: Start accepts. Automaton has 33677 states and 50891 transitions. Word has length 1818
[2020-10-27 16:16:48,361 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-10-27 16:16:48,361 INFO  L481      AbstractCegarLoop]: Abstraction has 33677 states and 50891 transitions.
[2020-10-27 16:16:48,361 INFO  L482      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2020-10-27 16:16:48,362 INFO  L276                IsEmpty]: Start isEmpty. Operand 33677 states and 50891 transitions.
[2020-10-27 16:16:48,471 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 1824
[2020-10-27 16:16:48,472 INFO  L414         BasicCegarLoop]: Found error trace
[2020-10-27 16:16:48,475 INFO  L422         BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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]
[2020-10-27 16:16:48,476 WARN  L518      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3
[2020-10-27 16:16:48,476 INFO  L429      AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-10-27 16:16:48,476 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-10-27 16:16:48,477 INFO  L82        PathProgramCache]: Analyzing trace with hash 631261318, now seen corresponding path program 1 times
[2020-10-27 16:16:48,478 INFO  L162   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-10-27 16:16:48,478 INFO  L353   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [194586124]
[2020-10-27 16:16:48,478 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-10-27 16:16:48,620 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-27 16:16:48,655 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-27 16:16:48,755 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-27 16:16:50,546 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-27 16:16:53,726 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-10-27 16:16:53,726 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 1853
[2020-10-27 16:16:53,726 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 3
[2020-10-27 16:16:53,727 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 5100
[2020-10-27 16:16:53,727 FATAL L256   erpolLogProxyWrapper]: Heuristic: DEEPEST
[2020-10-27 16:16:53,727 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 4
[2020-10-27 16:16:53,727 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 59
[2020-10-27 16:16:53,727 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 90
[2020-10-27 16:16:53,727 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-10-27 16:16:54,211 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-10-27 16:16:54,215 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-27 16:16:54,220 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-27 16:16:54,231 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-10-27 16:16:54,232 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 8
[2020-10-27 16:16:54,232 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-10-27 16:16:54,232 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 15
[2020-10-27 16:16:54,232 FATAL L256   erpolLogProxyWrapper]: Heuristic: DEEPEST
[2020-10-27 16:16:54,232 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-10-27 16:16:54,233 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 1
[2020-10-27 16:16:54,233 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-10-27 16:16:54,233 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-10-27 16:16:54,270 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8
[2020-10-27 16:16:54,273 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-27 16:16:54,274 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-27 16:16:54,308 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-10-27 16:16:54,309 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 33
[2020-10-27 16:16:54,309 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-10-27 16:16:54,309 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 34
[2020-10-27 16:16:54,309 FATAL L256   erpolLogProxyWrapper]: Heuristic: DEEPEST
[2020-10-27 16:16:54,309 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-10-27 16:16:54,309 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 1
[2020-10-27 16:16:54,309 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-10-27 16:16:54,310 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-10-27 16:16:54,325 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40
[2020-10-27 16:16:54,330 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-27 16:16:54,334 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-27 16:16:54,353 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-10-27 16:16:54,353 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 16
[2020-10-27 16:16:54,354 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-10-27 16:16:54,354 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 22
[2020-10-27 16:16:54,354 FATAL L256   erpolLogProxyWrapper]: Heuristic: DEEPEST
[2020-10-27 16:16:54,354 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 2
[2020-10-27 16:16:54,354 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 1
[2020-10-27 16:16:54,354 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 10
[2020-10-27 16:16:54,354 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-10-27 16:16:54,364 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55
[2020-10-27 16:16:54,388 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-27 16:16:54,406 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-27 16:16:54,552 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-10-27 16:16:54,553 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 88
[2020-10-27 16:16:54,553 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-10-27 16:16:54,553 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 163
[2020-10-27 16:16:54,553 FATAL L256   erpolLogProxyWrapper]: Heuristic: DEEPEST
[2020-10-27 16:16:54,553 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 4
[2020-10-27 16:16:54,554 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 0
[2020-10-27 16:16:54,554 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 88
[2020-10-27 16:16:54,554 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-10-27 16:16:56,334 INFO  L134       CoverageAnalysis]: Checked inductivity of 187 backedges. 171 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked.
[2020-10-27 16:16:56,334 INFO  L353   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [194586124]
[2020-10-27 16:16:56,334 INFO  L219   FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-10-27 16:16:56,334 INFO  L232   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7
[2020-10-27 16:16:56,335 INFO  L155   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799555725]
[2020-10-27 16:16:56,336 INFO  L461      AbstractCegarLoop]: Interpolant automaton has 7 states
[2020-10-27 16:16:56,336 INFO  L142   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-10-27 16:16:56,337 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2020-10-27 16:16:56,337 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42
[2020-10-27 16:16:56,337 INFO  L87              Difference]: Start difference. First operand 33677 states and 50891 transitions. Second operand 7 states.
[2020-10-27 16:17:27,629 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-10-27 16:17:27,629 INFO  L93              Difference]: Finished difference Result 101825 states and 170449 transitions.
[2020-10-27 16:17:27,630 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. 
[2020-10-27 16:17:27,631 INFO  L78                 Accepts]: Start accepts. Automaton has 7 states. Word has length 1823
[2020-10-27 16:17:27,631 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-10-27 16:17:27,906 INFO  L225             Difference]: With dead ends: 101825
[2020-10-27 16:17:27,906 INFO  L226             Difference]: Without dead ends: 68154
[2020-10-27 16:17:27,975 INFO  L677         BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132
[2020-10-27 16:17:28,043 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 68154 states.