/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block 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=NARROWEST --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 -i ../../../trunk/examples/svcomp/eca-rers2012/Problem05_label50.c


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


This is Ultimate 0.1.25-adbd35c
[2020-10-13 06:57:59,731 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2020-10-13 06:57:59,733 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2020-10-13 06:57:59,757 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2020-10-13 06:57:59,757 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2020-10-13 06:57:59,758 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2020-10-13 06:57:59,759 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2020-10-13 06:57:59,761 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2020-10-13 06:57:59,763 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2020-10-13 06:57:59,763 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
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[2020-10-13 06:57:59,766 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2020-10-13 06:57:59,766 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2020-10-13 06:57:59,767 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2020-10-13 06:57:59,768 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2020-10-13 06:57:59,769 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2020-10-13 06:57:59,770 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2020-10-13 06:57:59,772 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2020-10-13 06:57:59,773 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2020-10-13 06:57:59,775 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2020-10-13 06:57:59,776 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2020-10-13 06:57:59,777 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2020-10-13 06:57:59,783 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2020-10-13 06:57:59,788 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2020-10-13 06:57:59,789 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2020-10-13 06:57:59,789 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2020-10-13 06:57:59,790 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2020-10-13 06:57:59,790 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2020-10-13 06:57:59,794 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2020-10-13 06:57:59,794 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2020-10-13 06:57:59,795 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2020-10-13 06:57:59,796 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2020-10-13 06:57:59,797 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2020-10-13 06:57:59,798 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2020-10-13 06:57:59,798 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
[2020-10-13 06:57:59,799 INFO  L184        SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2020-10-13 06:57:59,799 INFO  L184        SettingsManager]: ReqParser provides no preferences, ignoring...
[2020-10-13 06:57:59,799 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
[2020-10-13 06:57:59,800 INFO  L181        SettingsManager]: Resetting Witness Parser preferences to default values
[2020-10-13 06:57:59,801 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2020-10-13 06:57:59,802 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
[2020-10-13 06:57:59,851 INFO  L113        SettingsManager]: Loading preferences was successful
[2020-10-13 06:57:59,851 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2020-10-13 06:57:59,853 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2020-10-13 06:57:59,854 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2020-10-13 06:57:59,854 INFO  L138        SettingsManager]:  * Use SBE=true
[2020-10-13 06:57:59,854 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2020-10-13 06:57:59,854 INFO  L138        SettingsManager]:  * sizeof long=4
[2020-10-13 06:57:59,854 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2020-10-13 06:57:59,855 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2020-10-13 06:57:59,855 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2020-10-13 06:57:59,855 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2020-10-13 06:57:59,855 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2020-10-13 06:57:59,855 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2020-10-13 06:57:59,856 INFO  L138        SettingsManager]:  * sizeof long double=12
[2020-10-13 06:57:59,856 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2020-10-13 06:57:59,856 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2020-10-13 06:57:59,856 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2020-10-13 06:57:59,856 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2020-10-13 06:57:59,857 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2020-10-13 06:57:59,857 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2020-10-13 06:57:59,858 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2020-10-13 06:57:59,858 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-10-13 06:57:59,858 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2020-10-13 06:57:59,858 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2020-10-13 06:57:59,859 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2020-10-13 06:57:59,859 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2020-10-13 06:57:59,859 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-10-13 06:57:59,859 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2020-10-13 06:57:59,859 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2020-10-13 06:57:59,860 INFO  L138        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> 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=NARROWEST;log-additional-information=true;unknown-allowed=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=NARROWEST;log-additional-information=true;unknown-allowed=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=NARROWEST;log-additional-information=true;unknown-allowed=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=NARROWEST;log-additional-information=true;unknown-allowed=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=NARROWEST;log-additional-information=true;unknown-allowed=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=NARROWEST;log-additional-information=true;unknown-allowed=true;
[2020-10-13 06:58:00,173 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2020-10-13 06:58:00,185 INFO  L258   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2020-10-13 06:58:00,188 INFO  L214   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2020-10-13 06:58:00,190 INFO  L271        PluginConnector]: Initializing CDTParser...
[2020-10-13 06:58:00,191 INFO  L275        PluginConnector]: CDTParser initialized
[2020-10-13 06:58:00,191 INFO  L429   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem05_label50.c
[2020-10-13 06:58:00,255 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3c74f0ef3/a1f5846ba9f3426a9a7404fc32cb6847/FLAG368cd8cc2
[2020-10-13 06:58:01,235 INFO  L306              CDTParser]: Found 1 translation units.
[2020-10-13 06:58:01,235 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem05_label50.c
[2020-10-13 06:58:01,285 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3c74f0ef3/a1f5846ba9f3426a9a7404fc32cb6847/FLAG368cd8cc2
[2020-10-13 06:58:01,603 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3c74f0ef3/a1f5846ba9f3426a9a7404fc32cb6847
[2020-10-13 06:58:01,613 INFO  L296   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2020-10-13 06:58:01,615 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2020-10-13 06:58:01,616 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2020-10-13 06:58:01,616 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2020-10-13 06:58:01,621 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2020-10-13 06:58:01,622 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:58:01" (1/1) ...
[2020-10-13 06:58:01,625 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6266eb80 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:58:01, skipping insertion in model container
[2020-10-13 06:58:01,625 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:58:01" (1/1) ...
[2020-10-13 06:58:01,635 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2020-10-13 06:58:01,893 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2020-10-13 06:58:04,387 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-10-13 06:58:04,400 INFO  L203         MainTranslator]: Completed pre-run
[2020-10-13 06:58:05,514 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-10-13 06:58:05,590 INFO  L208         MainTranslator]: Completed translation
[2020-10-13 06:58:05,591 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:58:05 WrapperNode
[2020-10-13 06:58:05,591 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2020-10-13 06:58:05,592 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2020-10-13 06:58:05,592 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2020-10-13 06:58:05,592 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2020-10-13 06:58:05,614 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:58:05" (1/1) ...
[2020-10-13 06:58:05,617 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:58:05" (1/1) ...
[2020-10-13 06:58:05,705 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:58:05" (1/1) ...
[2020-10-13 06:58:05,705 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:58:05" (1/1) ...
[2020-10-13 06:58:06,058 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:58:05" (1/1) ...
[2020-10-13 06:58:06,135 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:58:05" (1/1) ...
[2020-10-13 06:58:06,185 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:58:05" (1/1) ...
[2020-10-13 06:58:06,243 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2020-10-13 06:58:06,244 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2020-10-13 06:58:06,244 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2020-10-13 06:58:06,244 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2020-10-13 06:58:06,246 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:58:05" (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
[2020-10-13 06:58:06,336 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2020-10-13 06:58:06,337 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2020-10-13 06:58:06,337 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output
[2020-10-13 06:58:06,337 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output2
[2020-10-13 06:58:06,337 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output3
[2020-10-13 06:58:06,337 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output4
[2020-10-13 06:58:06,338 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output5
[2020-10-13 06:58:06,339 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output6
[2020-10-13 06:58:06,339 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output7
[2020-10-13 06:58:06,339 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output8
[2020-10-13 06:58:06,339 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2020-10-13 06:58:06,339 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output
[2020-10-13 06:58:06,340 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output2
[2020-10-13 06:58:06,340 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output3
[2020-10-13 06:58:06,340 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output4
[2020-10-13 06:58:06,341 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output5
[2020-10-13 06:58:06,342 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output6
[2020-10-13 06:58:06,342 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output7
[2020-10-13 06:58:06,342 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output8
[2020-10-13 06:58:06,343 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2020-10-13 06:58:06,343 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int
[2020-10-13 06:58:06,343 INFO  L130     BoogieDeclarations]: Found specification of procedure exit
[2020-10-13 06:58:06,344 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2020-10-13 06:58:06,344 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2020-10-13 06:58:06,344 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2020-10-13 06:58:14,420 INFO  L290             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2020-10-13 06:58:14,421 INFO  L295             CfgBuilder]: Removed 1 assume(true) statements.
[2020-10-13 06:58:14,440 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:58:14 BoogieIcfgContainer
[2020-10-13 06:58:14,441 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2020-10-13 06:58:14,442 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2020-10-13 06:58:14,442 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2020-10-13 06:58:14,445 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2020-10-13 06:58:14,446 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 06:58:01" (1/3) ...
[2020-10-13 06:58:14,447 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66240751 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:58:14, skipping insertion in model container
[2020-10-13 06:58:14,447 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:58:05" (2/3) ...
[2020-10-13 06:58:14,447 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66240751 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:58:14, skipping insertion in model container
[2020-10-13 06:58:14,447 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:58:14" (3/3) ...
[2020-10-13 06:58:14,449 INFO  L109   eAbstractionObserver]: Analyzing ICFG Problem05_label50.c
[2020-10-13 06:58:14,460 INFO  L157   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION
[2020-10-13 06:58:14,470 INFO  L169   ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2020-10-13 06:58:14,484 INFO  L251      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2020-10-13 06:58:14,518 INFO  L375      AbstractCegarLoop]: Interprodecural is true
[2020-10-13 06:58:14,519 INFO  L376      AbstractCegarLoop]: Hoare is true
[2020-10-13 06:58:14,519 INFO  L377      AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation
[2020-10-13 06:58:14,519 INFO  L378      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2020-10-13 06:58:14,519 INFO  L379      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2020-10-13 06:58:14,519 INFO  L380      AbstractCegarLoop]: Difference is false
[2020-10-13 06:58:14,519 INFO  L381      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2020-10-13 06:58:14,520 INFO  L385      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2020-10-13 06:58:14,571 INFO  L276                IsEmpty]: Start isEmpty. Operand 2222 states.
[2020-10-13 06:58:14,681 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 1703
[2020-10-13 06:58:14,681 INFO  L414         BasicCegarLoop]: Found error trace
[2020-10-13 06:58:14,686 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]
[2020-10-13 06:58:14,687 INFO  L427      AbstractCegarLoop]: === Iteration 1 === [calculate_output8Err0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-10-13 06:58:14,693 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-10-13 06:58:14,694 INFO  L82        PathProgramCache]: Analyzing trace with hash 462139361, now seen corresponding path program 1 times
[2020-10-13 06:58:14,702 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-10-13 06:58:14,703 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [936183098]
[2020-10-13 06:58:14,704 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-10-13 06:58:15,927 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-13 06:58:16,513 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-13 06:58:21,138 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-10-13 06:58:21,139 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 1724
[2020-10-13 06:58:21,139 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-10-13 06:58:21,139 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 5200
[2020-10-13 06:58:21,142 FATAL L256   erpolLogProxyWrapper]: Heuristic: NARROWEST
[2020-10-13 06:58:21,142 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 20
[2020-10-13 06:58:21,142 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 5
[2020-10-13 06:58:21,143 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 1718
[2020-10-13 06:58:21,143 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 3
[2020-10-13 06:58:22,896 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-10-13 06:58:22,900 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-13 06:58:22,903 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-13 06:58:22,910 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-10-13 06:58:22,910 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 8
[2020-10-13 06:58:22,910 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-10-13 06:58:22,911 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 8
[2020-10-13 06:58:22,911 FATAL L256   erpolLogProxyWrapper]: Heuristic: NARROWEST
[2020-10-13 06:58:22,911 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 2
[2020-10-13 06:58:22,911 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 1
[2020-10-13 06:58:22,912 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 2
[2020-10-13 06:58:22,912 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-10-13 06:58:24,833 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-10-13 06:58:24,834 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [936183098]
[2020-10-13 06:58:24,836 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-10-13 06:58:24,837 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2020-10-13 06:58:24,837 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487512624]
[2020-10-13 06:58:24,849 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-10-13 06:58:24,849 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-10-13 06:58:24,863 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-10-13 06:58:24,864 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-10-13 06:58:24,867 INFO  L87              Difference]: Start difference. First operand 2222 states. Second operand 4 states.
[2020-10-13 06:58:41,905 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-10-13 06:58:41,906 INFO  L93              Difference]: Finished difference Result 6309 states and 11850 transitions.
[2020-10-13 06:58:41,908 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2020-10-13 06:58:41,910 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 1702
[2020-10-13 06:58:41,918 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-10-13 06:58:41,965 INFO  L225             Difference]: With dead ends: 6309
[2020-10-13 06:58:41,965 INFO  L226             Difference]: Without dead ends: 4023
[2020-10-13 06:58:41,978 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2020-10-13 06:58:42,002 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 4023 states.
[2020-10-13 06:58:42,226 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 4023 to 4008.
[2020-10-13 06:58:42,227 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 4008 states.
[2020-10-13 06:58:42,244 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 4008 states to 4008 states and 6271 transitions.
[2020-10-13 06:58:42,247 INFO  L78                 Accepts]: Start accepts. Automaton has 4008 states and 6271 transitions. Word has length 1702
[2020-10-13 06:58:42,250 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-10-13 06:58:42,251 INFO  L479      AbstractCegarLoop]: Abstraction has 4008 states and 6271 transitions.
[2020-10-13 06:58:42,251 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2020-10-13 06:58:42,251 INFO  L276                IsEmpty]: Start isEmpty. Operand 4008 states and 6271 transitions.
[2020-10-13 06:58:42,358 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 1712
[2020-10-13 06:58:42,359 INFO  L414         BasicCegarLoop]: Found error trace
[2020-10-13 06:58:42,360 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]
[2020-10-13 06:58:42,360 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2020-10-13 06:58:42,361 INFO  L427      AbstractCegarLoop]: === Iteration 2 === [calculate_output8Err0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-10-13 06:58:42,361 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-10-13 06:58:42,362 INFO  L82        PathProgramCache]: Analyzing trace with hash 2055157974, now seen corresponding path program 1 times
[2020-10-13 06:58:42,362 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-10-13 06:58:42,362 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1799330134]
[2020-10-13 06:58:42,363 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-10-13 06:58:42,480 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-13 06:58:42,509 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-13 06:58:44,869 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-13 06:58:47,617 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-10-13 06:58:47,617 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 1735
[2020-10-13 06:58:47,617 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 2
[2020-10-13 06:58:47,618 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 5133
[2020-10-13 06:58:47,619 FATAL L256   erpolLogProxyWrapper]: Heuristic: NARROWEST
[2020-10-13 06:58:47,619 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 6
[2020-10-13 06:58:47,619 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 5
[2020-10-13 06:58:47,619 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 15
[2020-10-13 06:58:47,620 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-10-13 06:58:48,102 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-10-13 06:58:48,104 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-13 06:58:48,107 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-13 06:58:48,112 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-10-13 06:58:48,112 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 8
[2020-10-13 06:58:48,113 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-10-13 06:58:48,113 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 6
[2020-10-13 06:58:48,113 FATAL L256   erpolLogProxyWrapper]: Heuristic: NARROWEST
[2020-10-13 06:58:48,114 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 2
[2020-10-13 06:58:48,114 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 1
[2020-10-13 06:58:48,114 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 2
[2020-10-13 06:58:48,114 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-10-13 06:58:48,141 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8
[2020-10-13 06:58:48,144 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-13 06:58:48,147 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-13 06:58:48,166 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-10-13 06:58:48,166 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 10
[2020-10-13 06:58:48,167 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-10-13 06:58:48,167 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 21
[2020-10-13 06:58:48,167 FATAL L256   erpolLogProxyWrapper]: Heuristic: NARROWEST
[2020-10-13 06:58:48,167 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 4
[2020-10-13 06:58:48,167 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 0
[2020-10-13 06:58:48,168 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 10
[2020-10-13 06:58:48,168 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-10-13 06:58:49,632 INFO  L134       CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-10-13 06:58:49,633 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1799330134]
[2020-10-13 06:58:49,633 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-10-13 06:58:49,633 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6
[2020-10-13 06:58:49,634 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058319503]
[2020-10-13 06:58:49,638 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 7 states
[2020-10-13 06:58:49,638 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-10-13 06:58:49,638 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2020-10-13 06:58:49,639 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42
[2020-10-13 06:58:49,639 INFO  L87              Difference]: Start difference. First operand 4008 states and 6271 transitions. Second operand 7 states.
[2020-10-13 06:59:12,475 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-10-13 06:59:12,475 INFO  L93              Difference]: Finished difference Result 11838 states and 18667 transitions.
[2020-10-13 06:59:12,476 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. 
[2020-10-13 06:59:12,476 INFO  L78                 Accepts]: Start accepts. Automaton has 7 states. Word has length 1711
[2020-10-13 06:59:12,477 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-10-13 06:59:12,515 INFO  L225             Difference]: With dead ends: 11838
[2020-10-13 06:59:12,516 INFO  L226             Difference]: Without dead ends: 7836
[2020-10-13 06:59:12,527 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110
[2020-10-13 06:59:12,537 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 7836 states.
[2020-10-13 06:59:12,716 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 7836 to 7667.
[2020-10-13 06:59:12,717 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 7667 states.
[2020-10-13 06:59:12,744 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 7667 states to 7667 states and 10850 transitions.
[2020-10-13 06:59:12,745 INFO  L78                 Accepts]: Start accepts. Automaton has 7667 states and 10850 transitions. Word has length 1711
[2020-10-13 06:59:12,746 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-10-13 06:59:12,746 INFO  L479      AbstractCegarLoop]: Abstraction has 7667 states and 10850 transitions.
[2020-10-13 06:59:12,746 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 7 states.
[2020-10-13 06:59:12,746 INFO  L276                IsEmpty]: Start isEmpty. Operand 7667 states and 10850 transitions.
[2020-10-13 06:59:12,911 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 1724
[2020-10-13 06:59:12,911 INFO  L414         BasicCegarLoop]: Found error trace
[2020-10-13 06:59:12,913 INFO  L422         BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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, 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]
[2020-10-13 06:59:12,913 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2020-10-13 06:59:12,913 INFO  L427      AbstractCegarLoop]: === Iteration 3 === [calculate_output8Err0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-10-13 06:59:12,914 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-10-13 06:59:12,915 INFO  L82        PathProgramCache]: Analyzing trace with hash -1643436262, now seen corresponding path program 1 times
[2020-10-13 06:59:12,915 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-10-13 06:59:12,915 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [37455921]
[2020-10-13 06:59:12,916 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-10-13 06:59:13,031 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-13 06:59:13,062 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-13 06:59:13,158 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-13 06:59:18,305 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-10-13 06:59:18,306 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 1749
[2020-10-13 06:59:18,306 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 2
[2020-10-13 06:59:18,306 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 5270
[2020-10-13 06:59:18,307 FATAL L256   erpolLogProxyWrapper]: Heuristic: NARROWEST
[2020-10-13 06:59:18,307 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 4
[2020-10-13 06:59:18,307 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 22
[2020-10-13 06:59:18,307 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 12
[2020-10-13 06:59:18,308 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-10-13 06:59:18,690 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-10-13 06:59:18,692 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-13 06:59:18,694 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-13 06:59:18,696 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-10-13 06:59:18,696 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 8
[2020-10-13 06:59:18,696 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-10-13 06:59:18,697 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 3
[2020-10-13 06:59:18,697 FATAL L256   erpolLogProxyWrapper]: Heuristic: NARROWEST
[2020-10-13 06:59:18,697 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-10-13 06:59:18,697 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 1
[2020-10-13 06:59:18,697 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-10-13 06:59:18,698 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-10-13 06:59:18,719 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8
[2020-10-13 06:59:18,722 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-13 06:59:18,724 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-13 06:59:18,734 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-10-13 06:59:18,734 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 13
[2020-10-13 06:59:18,735 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-10-13 06:59:18,736 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 11
[2020-10-13 06:59:18,736 FATAL L256   erpolLogProxyWrapper]: Heuristic: NARROWEST
[2020-10-13 06:59:18,736 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 2
[2020-10-13 06:59:18,736 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 1
[2020-10-13 06:59:18,736 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 7
[2020-10-13 06:59:18,737 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-10-13 06:59:18,743 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20
[2020-10-13 06:59:18,745 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-13 06:59:18,747 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-13 06:59:18,758 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-10-13 06:59:18,758 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 10
[2020-10-13 06:59:18,759 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-10-13 06:59:18,759 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 12
[2020-10-13 06:59:18,759 FATAL L256   erpolLogProxyWrapper]: Heuristic: NARROWEST
[2020-10-13 06:59:18,759 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 4
[2020-10-13 06:59:18,759 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 0
[2020-10-13 06:59:18,760 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 10
[2020-10-13 06:59:18,760 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-10-13 06:59:19,777 INFO  L134       CoverageAnalysis]: Checked inductivity of 24 backedges. 21 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2020-10-13 06:59:19,777 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [37455921]
[2020-10-13 06:59:19,777 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-10-13 06:59:19,778 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7
[2020-10-13 06:59:19,778 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823686097]
[2020-10-13 06:59:19,780 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 7 states
[2020-10-13 06:59:19,781 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-10-13 06:59:19,781 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2020-10-13 06:59:19,781 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42
[2020-10-13 06:59:19,781 INFO  L87              Difference]: Start difference. First operand 7667 states and 10850 transitions. Second operand 7 states.
[2020-10-13 06:59:53,758 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-10-13 06:59:53,758 INFO  L93              Difference]: Finished difference Result 30313 states and 44672 transitions.
[2020-10-13 06:59:53,759 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. 
[2020-10-13 06:59:53,759 INFO  L78                 Accepts]: Start accepts. Automaton has 7 states. Word has length 1723
[2020-10-13 06:59:53,759 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-10-13 06:59:53,871 INFO  L225             Difference]: With dead ends: 30313
[2020-10-13 06:59:53,872 INFO  L226             Difference]: Without dead ends: 22652
[2020-10-13 06:59:53,903 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132
[2020-10-13 06:59:53,930 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 22652 states.
[2020-10-13 06:59:54,415 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 22652 to 22622.
[2020-10-13 06:59:54,416 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 22622 states.
[2020-10-13 06:59:54,460 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 22622 states to 22622 states and 29462 transitions.
[2020-10-13 06:59:54,460 INFO  L78                 Accepts]: Start accepts. Automaton has 22622 states and 29462 transitions. Word has length 1723
[2020-10-13 06:59:54,461 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-10-13 06:59:54,461 INFO  L479      AbstractCegarLoop]: Abstraction has 22622 states and 29462 transitions.
[2020-10-13 06:59:54,461 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 7 states.
[2020-10-13 06:59:54,461 INFO  L276                IsEmpty]: Start isEmpty. Operand 22622 states and 29462 transitions.
[2020-10-13 06:59:54,585 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 1740
[2020-10-13 06:59:54,585 INFO  L414         BasicCegarLoop]: Found error trace
[2020-10-13 06:59:54,587 INFO  L422         BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 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, 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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]
[2020-10-13 06:59:54,587 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2020-10-13 06:59:54,587 INFO  L427      AbstractCegarLoop]: === Iteration 4 === [calculate_output8Err0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-10-13 06:59:54,587 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-10-13 06:59:54,588 INFO  L82        PathProgramCache]: Analyzing trace with hash 547362183, now seen corresponding path program 1 times
[2020-10-13 06:59:54,588 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-10-13 06:59:54,589 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [321291771]
[2020-10-13 06:59:54,589 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-10-13 06:59:54,721 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-13 06:59:54,752 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-13 06:59:54,980 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-13 06:59:55,314 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-13 06:59:59,928 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-10-13 06:59:59,928 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 1767
[2020-10-13 06:59:59,929 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 3
[2020-10-13 06:59:59,929 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 5203
[2020-10-13 06:59:59,929 FATAL L256   erpolLogProxyWrapper]: Heuristic: NARROWEST
[2020-10-13 06:59:59,930 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 4
[2020-10-13 06:59:59,930 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 22
[2020-10-13 06:59:59,930 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 13
[2020-10-13 06:59:59,930 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-10-13 07:00:00,270 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-10-13 07:00:00,272 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-13 07:00:00,274 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-13 07:00:00,276 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-10-13 07:00:00,276 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 8
[2020-10-13 07:00:00,276 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-10-13 07:00:00,277 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 3
[2020-10-13 07:00:00,277 FATAL L256   erpolLogProxyWrapper]: Heuristic: NARROWEST
[2020-10-13 07:00:00,277 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-10-13 07:00:00,277 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 1
[2020-10-13 07:00:00,277 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-10-13 07:00:00,277 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-10-13 07:00:00,294 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8
[2020-10-13 07:00:00,297 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-13 07:00:00,299 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-13 07:00:00,306 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-10-13 07:00:00,306 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 13
[2020-10-13 07:00:00,306 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-10-13 07:00:00,307 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 8
[2020-10-13 07:00:00,307 FATAL L256   erpolLogProxyWrapper]: Heuristic: NARROWEST
[2020-10-13 07:00:00,307 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 2
[2020-10-13 07:00:00,307 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 1
[2020-10-13 07:00:00,307 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 7
[2020-10-13 07:00:00,308 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-10-13 07:00:00,311 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20
[2020-10-13 07:00:00,314 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-13 07:00:00,316 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-13 07:00:00,327 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-10-13 07:00:00,327 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 11
[2020-10-13 07:00:00,327 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-10-13 07:00:00,328 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 12
[2020-10-13 07:00:00,328 FATAL L256   erpolLogProxyWrapper]: Heuristic: NARROWEST
[2020-10-13 07:00:00,328 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 4
[2020-10-13 07:00:00,328 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 0
[2020-10-13 07:00:00,328 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 11
[2020-10-13 07:00:00,329 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-10-13 07:00:00,353 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30
[2020-10-13 07:00:00,356 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-13 07:00:00,359 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-13 07:00:00,365 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-10-13 07:00:00,366 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 16
[2020-10-13 07:00:00,366 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-10-13 07:00:00,366 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 8
[2020-10-13 07:00:00,366 FATAL L256   erpolLogProxyWrapper]: Heuristic: NARROWEST
[2020-10-13 07:00:00,366 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-10-13 07:00:00,367 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 13
[2020-10-13 07:00:00,367 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-10-13 07:00:00,367 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-10-13 07:00:01,424 INFO  L134       CoverageAnalysis]: Checked inductivity of 60 backedges. 39 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked.
[2020-10-13 07:00:01,425 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [321291771]
[2020-10-13 07:00:01,425 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-10-13 07:00:01,426 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7
[2020-10-13 07:00:01,426 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219901584]
[2020-10-13 07:00:01,428 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 7 states
[2020-10-13 07:00:01,428 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-10-13 07:00:01,429 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2020-10-13 07:00:01,429 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42
[2020-10-13 07:00:01,429 INFO  L87              Difference]: Start difference. First operand 22622 states and 29462 transitions. Second operand 7 states.
[2020-10-13 07:00:22,523 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-10-13 07:00:22,523 INFO  L93              Difference]: Finished difference Result 68071 states and 93952 transitions.
[2020-10-13 07:00:22,524 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. 
[2020-10-13 07:00:22,525 INFO  L78                 Accepts]: Start accepts. Automaton has 7 states. Word has length 1739
[2020-10-13 07:00:22,525 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-10-13 07:00:22,687 INFO  L225             Difference]: With dead ends: 68071
[2020-10-13 07:00:22,688 INFO  L226             Difference]: Without dead ends: 45455
[2020-10-13 07:00:22,764 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110
[2020-10-13 07:00:22,813 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 45455 states.
[2020-10-13 07:00:23,616 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 45455 to 45445.
[2020-10-13 07:00:23,617 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 45445 states.
[2020-10-13 07:00:23,723 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 45445 states to 45445 states and 59646 transitions.
[2020-10-13 07:00:23,724 INFO  L78                 Accepts]: Start accepts. Automaton has 45445 states and 59646 transitions. Word has length 1739
[2020-10-13 07:00:23,724 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-10-13 07:00:23,724 INFO  L479      AbstractCegarLoop]: Abstraction has 45445 states and 59646 transitions.
[2020-10-13 07:00:23,724 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 7 states.
[2020-10-13 07:00:23,725 INFO  L276                IsEmpty]: Start isEmpty. Operand 45445 states and 59646 transitions.
[2020-10-13 07:00:23,925 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 1740
[2020-10-13 07:00:23,925 INFO  L414         BasicCegarLoop]: Found error trace
[2020-10-13 07:00:23,927 INFO  L422         BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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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]
[2020-10-13 07:00:23,928 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3
[2020-10-13 07:00:23,928 INFO  L427      AbstractCegarLoop]: === Iteration 5 === [calculate_output8Err0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-10-13 07:00:23,928 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-10-13 07:00:23,929 INFO  L82        PathProgramCache]: Analyzing trace with hash -1978752350, now seen corresponding path program 1 times
[2020-10-13 07:00:23,929 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-10-13 07:00:23,930 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1112335372]
[2020-10-13 07:00:23,930 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-10-13 07:00:24,048 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-13 07:00:24,084 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-13 07:00:24,164 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-13 07:00:26,332 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-13 07:00:29,077 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-10-13 07:00:29,078 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 1765
[2020-10-13 07:00:29,078 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 3
[2020-10-13 07:00:29,078 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 5025
[2020-10-13 07:00:29,078 FATAL L256   erpolLogProxyWrapper]: Heuristic: NARROWEST
[2020-10-13 07:00:29,079 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 4
[2020-10-13 07:00:29,079 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 32
[2020-10-13 07:00:29,079 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 18
[2020-10-13 07:00:29,079 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-10-13 07:00:29,361 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-10-13 07:00:29,363 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-13 07:00:29,364 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-13 07:00:29,366 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-10-13 07:00:29,366 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 8
[2020-10-13 07:00:29,366 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-10-13 07:00:29,366 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 2
[2020-10-13 07:00:29,366 FATAL L256   erpolLogProxyWrapper]: Heuristic: NARROWEST
[2020-10-13 07:00:29,367 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-10-13 07:00:29,367 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 1
[2020-10-13 07:00:29,367 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-10-13 07:00:29,367 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-10-13 07:00:29,387 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8
[2020-10-13 07:00:29,392 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-13 07:00:29,395 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-13 07:00:29,405 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-10-13 07:00:29,405 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 23
[2020-10-13 07:00:29,405 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-10-13 07:00:29,405 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 12
[2020-10-13 07:00:29,406 FATAL L256   erpolLogProxyWrapper]: Heuristic: NARROWEST
[2020-10-13 07:00:29,406 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 2
[2020-10-13 07:00:29,406 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 1
[2020-10-13 07:00:29,406 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 17
[2020-10-13 07:00:29,406 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-10-13 07:00:29,411 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30
[2020-10-13 07:00:29,415 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-13 07:00:29,418 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-13 07:00:29,439 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-10-13 07:00:29,439 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 16
[2020-10-13 07:00:29,439 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-10-13 07:00:29,440 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 23
[2020-10-13 07:00:29,440 FATAL L256   erpolLogProxyWrapper]: Heuristic: NARROWEST
[2020-10-13 07:00:29,440 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 4
[2020-10-13 07:00:29,440 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 0
[2020-10-13 07:00:29,440 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 16
[2020-10-13 07:00:29,441 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-10-13 07:00:31,161 INFO  L134       CoverageAnalysis]: Checked inductivity of 46 backedges. 43 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2020-10-13 07:00:31,162 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1112335372]
[2020-10-13 07:00:31,162 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-10-13 07:00:31,162 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7
[2020-10-13 07:00:31,162 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267182549]
[2020-10-13 07:00:31,164 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 7 states
[2020-10-13 07:00:31,164 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-10-13 07:00:31,164 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2020-10-13 07:00:31,164 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42
[2020-10-13 07:00:31,164 INFO  L87              Difference]: Start difference. First operand 45445 states and 59646 transitions. Second operand 7 states.
[2020-10-13 07:01:02,535 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-10-13 07:01:02,535 INFO  L93              Difference]: Finished difference Result 112254 states and 146092 transitions.
[2020-10-13 07:01:02,536 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2020-10-13 07:01:02,536 INFO  L78                 Accepts]: Start accepts. Automaton has 7 states. Word has length 1739
[2020-10-13 07:01:02,537 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-10-13 07:01:02,764 INFO  L225             Difference]: With dead ends: 112254
[2020-10-13 07:01:02,764 INFO  L226             Difference]: Without dead ends: 66815
[2020-10-13 07:01:02,850 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132
[2020-10-13 07:01:02,921 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 66815 states.
[2020-10-13 07:01:04,065 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 66815 to 66809.
[2020-10-13 07:01:04,065 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 66809 states.
[2020-10-13 07:01:04,167 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 66809 states to 66809 states and 81635 transitions.
[2020-10-13 07:01:04,168 INFO  L78                 Accepts]: Start accepts. Automaton has 66809 states and 81635 transitions. Word has length 1739
[2020-10-13 07:01:04,169 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-10-13 07:01:04,169 INFO  L479      AbstractCegarLoop]: Abstraction has 66809 states and 81635 transitions.
[2020-10-13 07:01:04,169 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 7 states.
[2020-10-13 07:01:04,169 INFO  L276                IsEmpty]: Start isEmpty. Operand 66809 states and 81635 transitions.
[2020-10-13 07:01:04,335 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 1750
[2020-10-13 07:01:04,336 INFO  L414         BasicCegarLoop]: Found error trace
[2020-10-13 07:01:04,338 INFO  L422         BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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[2020-10-13 07:01:04,338 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4
[2020-10-13 07:01:04,338 INFO  L427      AbstractCegarLoop]: === Iteration 6 === [calculate_output8Err0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-10-13 07:01:04,338 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-10-13 07:01:04,339 INFO  L82        PathProgramCache]: Analyzing trace with hash -420348350, now seen corresponding path program 1 times
[2020-10-13 07:01:04,339 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-10-13 07:01:04,340 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1314663282]
[2020-10-13 07:01:04,340 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-10-13 07:01:04,479 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-13 07:01:04,516 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-13 07:01:04,571 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-13 07:01:04,752 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-13 07:01:05,868 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-13 07:01:09,775 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-10-13 07:01:09,776 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 1777
[2020-10-13 07:01:09,776 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 4
[2020-10-13 07:01:09,776 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 5291
[2020-10-13 07:01:09,777 FATAL L256   erpolLogProxyWrapper]: Heuristic: NARROWEST
[2020-10-13 07:01:09,777 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 4
[2020-10-13 07:01:09,778 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 32
[2020-10-13 07:01:09,778 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 13
[2020-10-13 07:01:09,778 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-10-13 07:01:10,196 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-10-13 07:01:10,197 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-13 07:01:10,199 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-13 07:01:10,200 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-10-13 07:01:10,201 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 8
[2020-10-13 07:01:10,201 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-10-13 07:01:10,201 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 2
[2020-10-13 07:01:10,201 FATAL L256   erpolLogProxyWrapper]: Heuristic: NARROWEST
[2020-10-13 07:01:10,201 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-10-13 07:01:10,201 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 1
[2020-10-13 07:01:10,201 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-10-13 07:01:10,202 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-10-13 07:01:10,227 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8
[2020-10-13 07:01:10,233 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-13 07:01:10,237 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-13 07:01:10,254 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-10-13 07:01:10,254 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 23
[2020-10-13 07:01:10,255 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-10-13 07:01:10,255 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 20
[2020-10-13 07:01:10,255 FATAL L256   erpolLogProxyWrapper]: Heuristic: NARROWEST
[2020-10-13 07:01:10,255 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 2
[2020-10-13 07:01:10,255 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 1
[2020-10-13 07:01:10,255 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 17
[2020-10-13 07:01:10,256 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-10-13 07:01:10,273 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30
[2020-10-13 07:01:10,275 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-13 07:01:10,277 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-13 07:01:10,290 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-10-13 07:01:10,290 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 11
[2020-10-13 07:01:10,290 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-10-13 07:01:10,291 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 13
[2020-10-13 07:01:10,291 FATAL L256   erpolLogProxyWrapper]: Heuristic: NARROWEST
[2020-10-13 07:01:10,291 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 4
[2020-10-13 07:01:10,291 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 0
[2020-10-13 07:01:10,291 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 11
[2020-10-13 07:01:10,292 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-10-13 07:01:10,325 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40
[2020-10-13 07:01:10,329 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-13 07:01:10,332 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-13 07:01:10,339 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-10-13 07:01:10,339 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 16
[2020-10-13 07:01:10,340 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-10-13 07:01:10,340 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 9
[2020-10-13 07:01:10,340 FATAL L256   erpolLogProxyWrapper]: Heuristic: NARROWEST
[2020-10-13 07:01:10,340 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-10-13 07:01:10,341 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 13
[2020-10-13 07:01:10,341 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-10-13 07:01:10,341 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-10-13 07:01:11,455 INFO  L134       CoverageAnalysis]: Checked inductivity of 73 backedges. 49 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked.
[2020-10-13 07:01:11,456 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1314663282]
[2020-10-13 07:01:11,456 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-10-13 07:01:11,456 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8
[2020-10-13 07:01:11,456 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130512873]
[2020-10-13 07:01:11,458 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 8 states
[2020-10-13 07:01:11,458 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-10-13 07:01:11,459 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2020-10-13 07:01:11,459 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56
[2020-10-13 07:01:11,459 INFO  L87              Difference]: Start difference. First operand 66809 states and 81635 transitions. Second operand 8 states.