/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=BIGGEST --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_label04.c


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


This is Ultimate 0.1.25-adbd35c
[2020-10-12 11:45:58,541 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2020-10-12 11:45:58,544 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2020-10-12 11:45:58,568 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2020-10-12 11:45:58,569 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2020-10-12 11:45:58,570 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2020-10-12 11:45:58,571 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2020-10-12 11:45:58,573 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2020-10-12 11:45:58,575 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2020-10-12 11:45:58,575 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
[2020-10-12 11:45:58,576 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
[2020-10-12 11:45:58,578 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2020-10-12 11:45:58,578 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2020-10-12 11:45:58,579 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2020-10-12 11:45:58,580 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2020-10-12 11:45:58,581 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2020-10-12 11:45:58,582 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2020-10-12 11:45:58,583 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2020-10-12 11:45:58,584 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2020-10-12 11:45:58,586 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2020-10-12 11:45:58,588 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2020-10-12 11:45:58,589 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2020-10-12 11:45:58,590 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2020-10-12 11:45:58,591 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2020-10-12 11:45:58,593 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2020-10-12 11:45:58,593 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2020-10-12 11:45:58,594 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2020-10-12 11:45:58,595 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2020-10-12 11:45:58,595 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2020-10-12 11:45:58,596 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2020-10-12 11:45:58,596 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2020-10-12 11:45:58,597 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2020-10-12 11:45:58,598 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2020-10-12 11:45:58,598 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2020-10-12 11:45:58,600 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2020-10-12 11:45:58,600 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
[2020-10-12 11:45:58,601 INFO  L184        SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2020-10-12 11:45:58,601 INFO  L184        SettingsManager]: ReqParser provides no preferences, ignoring...
[2020-10-12 11:45:58,601 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
[2020-10-12 11:45:58,602 INFO  L181        SettingsManager]: Resetting Witness Parser preferences to default values
[2020-10-12 11:45:58,603 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2020-10-12 11:45:58,603 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
[2020-10-12 11:45:58,627 INFO  L113        SettingsManager]: Loading preferences was successful
[2020-10-12 11:45:58,627 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2020-10-12 11:45:58,628 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2020-10-12 11:45:58,628 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2020-10-12 11:45:58,629 INFO  L138        SettingsManager]:  * Use SBE=true
[2020-10-12 11:45:58,629 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2020-10-12 11:45:58,629 INFO  L138        SettingsManager]:  * sizeof long=4
[2020-10-12 11:45:58,629 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2020-10-12 11:45:58,629 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2020-10-12 11:45:58,630 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2020-10-12 11:45:58,630 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2020-10-12 11:45:58,630 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2020-10-12 11:45:58,630 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2020-10-12 11:45:58,630 INFO  L138        SettingsManager]:  * sizeof long double=12
[2020-10-12 11:45:58,631 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2020-10-12 11:45:58,631 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2020-10-12 11:45:58,631 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2020-10-12 11:45:58,631 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2020-10-12 11:45:58,631 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2020-10-12 11:45:58,632 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2020-10-12 11:45:58,632 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2020-10-12 11:45:58,632 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-10-12 11:45:58,632 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2020-10-12 11:45:58,632 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2020-10-12 11:45:58,633 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2020-10-12 11:45:58,633 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2020-10-12 11:45:58,633 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-10-12 11:45:58,633 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2020-10-12 11:45:58,633 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2020-10-12 11:45:58,634 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=BIGGEST;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=BIGGEST;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=BIGGEST;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=BIGGEST;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=BIGGEST;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=BIGGEST;log-additional-information=true;unknown-allowed=true;
[2020-10-12 11:45:58,967 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2020-10-12 11:45:58,989 INFO  L258   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2020-10-12 11:45:58,993 INFO  L214   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2020-10-12 11:45:58,995 INFO  L271        PluginConnector]: Initializing CDTParser...
[2020-10-12 11:45:58,996 INFO  L275        PluginConnector]: CDTParser initialized
[2020-10-12 11:45:58,997 INFO  L429   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem05_label04.c
[2020-10-12 11:45:59,056 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6d2a65471/66a097db96794a61ab23ec4cdfbccc8c/FLAGd8c5b9929
[2020-10-12 11:46:00,085 INFO  L306              CDTParser]: Found 1 translation units.
[2020-10-12 11:46:00,085 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem05_label04.c
[2020-10-12 11:46:00,135 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6d2a65471/66a097db96794a61ab23ec4cdfbccc8c/FLAGd8c5b9929
[2020-10-12 11:46:00,347 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6d2a65471/66a097db96794a61ab23ec4cdfbccc8c
[2020-10-12 11:46:00,357 INFO  L296   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2020-10-12 11:46:00,360 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2020-10-12 11:46:00,362 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2020-10-12 11:46:00,362 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2020-10-12 11:46:00,366 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2020-10-12 11:46:00,367 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 11:46:00" (1/1) ...
[2020-10-12 11:46:00,371 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f0c700e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 11:46:00, skipping insertion in model container
[2020-10-12 11:46:00,372 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 11:46:00" (1/1) ...
[2020-10-12 11:46:00,381 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2020-10-12 11:46:00,686 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2020-10-12 11:46:03,476 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-10-12 11:46:03,483 INFO  L203         MainTranslator]: Completed pre-run
[2020-10-12 11:46:04,606 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-10-12 11:46:04,675 INFO  L208         MainTranslator]: Completed translation
[2020-10-12 11:46:04,676 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 11:46:04 WrapperNode
[2020-10-12 11:46:04,676 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2020-10-12 11:46:04,678 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2020-10-12 11:46:04,678 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2020-10-12 11:46:04,678 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2020-10-12 11:46:04,692 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 11:46:04" (1/1) ...
[2020-10-12 11:46:04,694 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 11:46:04" (1/1) ...
[2020-10-12 11:46:04,792 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 11:46:04" (1/1) ...
[2020-10-12 11:46:04,792 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 11:46:04" (1/1) ...
[2020-10-12 11:46:04,947 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 11:46:04" (1/1) ...
[2020-10-12 11:46:05,015 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 11:46:04" (1/1) ...
[2020-10-12 11:46:05,057 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 11:46:04" (1/1) ...
[2020-10-12 11:46:05,107 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2020-10-12 11:46:05,108 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2020-10-12 11:46:05,108 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2020-10-12 11:46:05,108 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2020-10-12 11:46:05,109 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 11:46:04" (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
[2020-10-12 11:46:05,174 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2020-10-12 11:46:05,175 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2020-10-12 11:46:05,175 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output
[2020-10-12 11:46:05,175 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output2
[2020-10-12 11:46:05,175 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output3
[2020-10-12 11:46:05,176 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output4
[2020-10-12 11:46:05,176 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output5
[2020-10-12 11:46:05,177 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output6
[2020-10-12 11:46:05,177 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output7
[2020-10-12 11:46:05,177 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output8
[2020-10-12 11:46:05,178 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2020-10-12 11:46:05,178 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output
[2020-10-12 11:46:05,178 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output2
[2020-10-12 11:46:05,178 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output3
[2020-10-12 11:46:05,179 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output4
[2020-10-12 11:46:05,179 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output5
[2020-10-12 11:46:05,179 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output6
[2020-10-12 11:46:05,179 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output7
[2020-10-12 11:46:05,179 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output8
[2020-10-12 11:46:05,180 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2020-10-12 11:46:05,180 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int
[2020-10-12 11:46:05,180 INFO  L130     BoogieDeclarations]: Found specification of procedure exit
[2020-10-12 11:46:05,180 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2020-10-12 11:46:05,277 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2020-10-12 11:46:05,278 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2020-10-12 11:46:13,065 INFO  L290             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2020-10-12 11:46:13,065 INFO  L295             CfgBuilder]: Removed 1 assume(true) statements.
[2020-10-12 11:46:13,079 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 11:46:13 BoogieIcfgContainer
[2020-10-12 11:46:13,079 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2020-10-12 11:46:13,081 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2020-10-12 11:46:13,081 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2020-10-12 11:46:13,084 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2020-10-12 11:46:13,084 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 11:46:00" (1/3) ...
[2020-10-12 11:46:13,085 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17987b8f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 11:46:13, skipping insertion in model container
[2020-10-12 11:46:13,085 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 11:46:04" (2/3) ...
[2020-10-12 11:46:13,086 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17987b8f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 11:46:13, skipping insertion in model container
[2020-10-12 11:46:13,086 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 11:46:13" (3/3) ...
[2020-10-12 11:46:13,087 INFO  L109   eAbstractionObserver]: Analyzing ICFG Problem05_label04.c
[2020-10-12 11:46:13,098 INFO  L157   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION
[2020-10-12 11:46:13,107 INFO  L169   ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2020-10-12 11:46:13,121 INFO  L251      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2020-10-12 11:46:13,152 INFO  L375      AbstractCegarLoop]: Interprodecural is true
[2020-10-12 11:46:13,152 INFO  L376      AbstractCegarLoop]: Hoare is true
[2020-10-12 11:46:13,152 INFO  L377      AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation
[2020-10-12 11:46:13,152 INFO  L378      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2020-10-12 11:46:13,153 INFO  L379      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2020-10-12 11:46:13,153 INFO  L380      AbstractCegarLoop]: Difference is false
[2020-10-12 11:46:13,153 INFO  L381      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2020-10-12 11:46:13,153 INFO  L385      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2020-10-12 11:46:13,203 INFO  L276                IsEmpty]: Start isEmpty. Operand 2222 states.
[2020-10-12 11:46:13,312 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 1713
[2020-10-12 11:46:13,312 INFO  L414         BasicCegarLoop]: Found error trace
[2020-10-12 11:46:13,315 INFO  L422         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-10-12 11:46:13,316 INFO  L427      AbstractCegarLoop]: === Iteration 1 === [calculate_output8Err0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-10-12 11:46:13,322 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-10-12 11:46:13,323 INFO  L82        PathProgramCache]: Analyzing trace with hash 1985532265, now seen corresponding path program 1 times
[2020-10-12 11:46:13,332 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-10-12 11:46:13,332 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [958071006]
[2020-10-12 11:46:13,333 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-10-12 11:46:14,375 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-12 11:46:14,922 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-12 11:46:19,648 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-10-12 11:46:19,648 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 1734
[2020-10-12 11:46:19,649 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-10-12 11:46:19,649 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 5263
[2020-10-12 11:46:19,651 FATAL L256   erpolLogProxyWrapper]: Heuristic: BIGGEST
[2020-10-12 11:46:19,651 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 20
[2020-10-12 11:46:19,652 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 5
[2020-10-12 11:46:19,652 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 1728
[2020-10-12 11:46:19,652 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 2
[2020-10-12 11:46:21,315 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-10-12 11:46:21,322 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-12 11:46:21,328 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-12 11:46:21,456 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-10-12 11:46:21,456 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 8
[2020-10-12 11:46:21,457 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-10-12 11:46:21,457 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 133
[2020-10-12 11:46:21,457 FATAL L256   erpolLogProxyWrapper]: Heuristic: BIGGEST
[2020-10-12 11:46:21,457 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 2
[2020-10-12 11:46:21,457 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 1
[2020-10-12 11:46:21,458 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 2
[2020-10-12 11:46:21,458 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-10-12 11:46:24,406 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-10-12 11:46:24,407 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [958071006]
[2020-10-12 11:46:24,408 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-10-12 11:46:24,409 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-10-12 11:46:24,409 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063686866]
[2020-10-12 11:46:24,419 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 5 states
[2020-10-12 11:46:24,419 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-10-12 11:46:24,433 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2020-10-12 11:46:24,434 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20
[2020-10-12 11:46:24,436 INFO  L87              Difference]: Start difference. First operand 2222 states. Second operand 5 states.
[2020-10-12 11:46:41,727 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-10-12 11:46:41,727 INFO  L93              Difference]: Finished difference Result 6360 states and 11959 transitions.
[2020-10-12 11:46:41,729 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2020-10-12 11:46:41,730 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 1712
[2020-10-12 11:46:41,742 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-10-12 11:46:41,794 INFO  L225             Difference]: With dead ends: 6360
[2020-10-12 11:46:41,794 INFO  L226             Difference]: Without dead ends: 4074
[2020-10-12 11:46:41,810 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30
[2020-10-12 11:46:41,836 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 4074 states.
[2020-10-12 11:46:42,018 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 4074 to 3986.
[2020-10-12 11:46:42,020 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 3986 states.
[2020-10-12 11:46:42,040 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 3986 states to 3986 states and 7372 transitions.
[2020-10-12 11:46:42,043 INFO  L78                 Accepts]: Start accepts. Automaton has 3986 states and 7372 transitions. Word has length 1712
[2020-10-12 11:46:42,046 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-10-12 11:46:42,047 INFO  L479      AbstractCegarLoop]: Abstraction has 3986 states and 7372 transitions.
[2020-10-12 11:46:42,047 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2020-10-12 11:46:42,047 INFO  L276                IsEmpty]: Start isEmpty. Operand 3986 states and 7372 transitions.
[2020-10-12 11:46:42,292 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 1723
[2020-10-12 11:46:42,292 INFO  L414         BasicCegarLoop]: Found error trace
[2020-10-12 11:46:42,294 INFO  L422         BasicCegarLoop]: trace histogram [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, 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]
[2020-10-12 11:46:42,294 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2020-10-12 11:46:42,294 INFO  L427      AbstractCegarLoop]: === Iteration 2 === [calculate_output8Err0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-10-12 11:46:42,295 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-10-12 11:46:42,296 INFO  L82        PathProgramCache]: Analyzing trace with hash 1215829769, now seen corresponding path program 1 times
[2020-10-12 11:46:42,296 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-10-12 11:46:42,297 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [557590228]
[2020-10-12 11:46:42,297 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-10-12 11:46:42,416 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-12 11:46:42,446 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-12 11:46:44,572 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-12 11:46:47,532 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-10-12 11:46:47,533 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 1746
[2020-10-12 11:46:47,533 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 2
[2020-10-12 11:46:47,533 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 5113
[2020-10-12 11:46:47,535 FATAL L256   erpolLogProxyWrapper]: Heuristic: BIGGEST
[2020-10-12 11:46:47,538 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 18
[2020-10-12 11:46:47,539 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 20
[2020-10-12 11:46:47,539 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 1725
[2020-10-12 11:46:47,539 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 5
[2020-10-12 11:46:49,496 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-10-12 11:46:49,501 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-12 11:46:49,503 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-12 11:46:49,508 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-10-12 11:46:49,508 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 8
[2020-10-12 11:46:49,508 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-10-12 11:46:49,509 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 5
[2020-10-12 11:46:49,510 FATAL L256   erpolLogProxyWrapper]: Heuristic: BIGGEST
[2020-10-12 11:46:49,510 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-10-12 11:46:49,511 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 1
[2020-10-12 11:46:49,511 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-10-12 11:46:49,511 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-10-12 11:46:49,540 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8
[2020-10-12 11:46:49,544 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-12 11:46:49,546 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-12 11:46:49,557 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-10-12 11:46:49,558 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 11
[2020-10-12 11:46:49,558 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-10-12 11:46:49,558 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 12
[2020-10-12 11:46:49,559 FATAL L256   erpolLogProxyWrapper]: Heuristic: BIGGEST
[2020-10-12 11:46:49,559 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 2
[2020-10-12 11:46:49,559 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 1
[2020-10-12 11:46:49,559 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 5
[2020-10-12 11:46:49,559 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-10-12 11:46:51,444 INFO  L134       CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-10-12 11:46:51,445 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [557590228]
[2020-10-12 11:46:51,445 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-10-12 11:46:51,445 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5
[2020-10-12 11:46:51,446 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743117849]
[2020-10-12 11:46:51,450 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 5 states
[2020-10-12 11:46:51,450 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-10-12 11:46:51,450 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2020-10-12 11:46:51,451 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20
[2020-10-12 11:46:51,451 INFO  L87              Difference]: Start difference. First operand 3986 states and 7372 transitions. Second operand 5 states.
[2020-10-12 11:47:11,439 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-10-12 11:47:11,439 INFO  L93              Difference]: Finished difference Result 11555 states and 21674 transitions.
[2020-10-12 11:47:11,440 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2020-10-12 11:47:11,440 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 1722
[2020-10-12 11:47:11,444 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-10-12 11:47:11,487 INFO  L225             Difference]: With dead ends: 11555
[2020-10-12 11:47:11,488 INFO  L226             Difference]: Without dead ends: 7575
[2020-10-12 11:47:11,501 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30
[2020-10-12 11:47:11,512 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 7575 states.
[2020-10-12 11:47:11,833 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 7575 to 7528.
[2020-10-12 11:47:11,834 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 7528 states.
[2020-10-12 11:47:11,868 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 7528 states to 7528 states and 11774 transitions.
[2020-10-12 11:47:11,869 INFO  L78                 Accepts]: Start accepts. Automaton has 7528 states and 11774 transitions. Word has length 1722
[2020-10-12 11:47:11,872 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-10-12 11:47:11,872 INFO  L479      AbstractCegarLoop]: Abstraction has 7528 states and 11774 transitions.
[2020-10-12 11:47:11,873 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2020-10-12 11:47:11,873 INFO  L276                IsEmpty]: Start isEmpty. Operand 7528 states and 11774 transitions.
[2020-10-12 11:47:11,995 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 1728
[2020-10-12 11:47:11,995 INFO  L414         BasicCegarLoop]: Found error trace
[2020-10-12 11:47:11,997 INFO  L422         BasicCegarLoop]: trace histogram [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, 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]
[2020-10-12 11:47:11,997 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2020-10-12 11:47:11,998 INFO  L427      AbstractCegarLoop]: === Iteration 3 === [calculate_output8Err0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-10-12 11:47:11,998 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-10-12 11:47:11,999 INFO  L82        PathProgramCache]: Analyzing trace with hash 356933684, now seen corresponding path program 1 times
[2020-10-12 11:47:11,999 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-10-12 11:47:11,999 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1336486638]
[2020-10-12 11:47:12,000 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-10-12 11:47:12,117 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-12 11:47:12,150 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-12 11:47:13,606 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-12 11:47:17,267 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-10-12 11:47:17,267 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 1751
[2020-10-12 11:47:17,267 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 2
[2020-10-12 11:47:17,268 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 5147
[2020-10-12 11:47:17,268 FATAL L256   erpolLogProxyWrapper]: Heuristic: BIGGEST
[2020-10-12 11:47:17,268 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 18
[2020-10-12 11:47:17,268 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 24
[2020-10-12 11:47:17,269 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 1726
[2020-10-12 11:47:17,269 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-10-12 11:47:18,223 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-10-12 11:47:18,225 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-12 11:47:18,226 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-12 11:47:18,229 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-10-12 11:47:18,229 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 8
[2020-10-12 11:47:18,229 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-10-12 11:47:18,229 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 3
[2020-10-12 11:47:18,230 FATAL L256   erpolLogProxyWrapper]: Heuristic: BIGGEST
[2020-10-12 11:47:18,230 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-10-12 11:47:18,230 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 1
[2020-10-12 11:47:18,230 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-10-12 11:47:18,231 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-10-12 11:47:18,247 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8
[2020-10-12 11:47:18,250 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-12 11:47:18,253 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-12 11:47:18,267 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-10-12 11:47:18,267 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 16
[2020-10-12 11:47:18,268 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-10-12 11:47:18,268 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 16
[2020-10-12 11:47:18,268 FATAL L256   erpolLogProxyWrapper]: Heuristic: BIGGEST
[2020-10-12 11:47:18,268 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 2
[2020-10-12 11:47:18,269 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 1
[2020-10-12 11:47:18,269 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 9
[2020-10-12 11:47:18,269 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-10-12 11:47:20,975 INFO  L134       CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-10-12 11:47:20,975 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1336486638]
[2020-10-12 11:47:20,975 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-10-12 11:47:20,976 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5
[2020-10-12 11:47:20,976 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075780827]
[2020-10-12 11:47:20,978 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 5 states
[2020-10-12 11:47:20,979 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-10-12 11:47:20,979 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2020-10-12 11:47:20,979 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20
[2020-10-12 11:47:20,980 INFO  L87              Difference]: Start difference. First operand 7528 states and 11774 transitions. Second operand 5 states.
[2020-10-12 11:47:41,730 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-10-12 11:47:41,730 INFO  L93              Difference]: Finished difference Result 18626 states and 30575 transitions.
[2020-10-12 11:47:41,731 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2020-10-12 11:47:41,731 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 1727
[2020-10-12 11:47:41,735 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-10-12 11:47:41,803 INFO  L225             Difference]: With dead ends: 18626
[2020-10-12 11:47:41,804 INFO  L226             Difference]: Without dead ends: 11104
[2020-10-12 11:47:41,827 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30
[2020-10-12 11:47:41,842 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 11104 states.
[2020-10-12 11:47:42,083 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 11104 to 11088.
[2020-10-12 11:47:42,083 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 11088 states.
[2020-10-12 11:47:42,111 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 11088 states to 11088 states and 16323 transitions.
[2020-10-12 11:47:42,112 INFO  L78                 Accepts]: Start accepts. Automaton has 11088 states and 16323 transitions. Word has length 1727
[2020-10-12 11:47:42,115 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-10-12 11:47:42,116 INFO  L479      AbstractCegarLoop]: Abstraction has 11088 states and 16323 transitions.
[2020-10-12 11:47:42,117 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2020-10-12 11:47:42,121 INFO  L276                IsEmpty]: Start isEmpty. Operand 11088 states and 16323 transitions.
[2020-10-12 11:47:42,192 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 1735
[2020-10-12 11:47:42,193 INFO  L414         BasicCegarLoop]: Found error trace
[2020-10-12 11:47:42,194 INFO  L422         BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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]
[2020-10-12 11:47:42,195 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2020-10-12 11:47:42,195 INFO  L427      AbstractCegarLoop]: === Iteration 4 === [calculate_output8Err0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-10-12 11:47:42,195 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-10-12 11:47:42,196 INFO  L82        PathProgramCache]: Analyzing trace with hash -68565942, now seen corresponding path program 1 times
[2020-10-12 11:47:42,196 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-10-12 11:47:42,197 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1626003820]
[2020-10-12 11:47:42,198 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-10-12 11:47:42,630 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-12 11:47:42,948 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-12 11:47:43,511 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-12 11:47:47,652 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-10-12 11:47:47,652 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 1758
[2020-10-12 11:47:47,652 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 2
[2020-10-12 11:47:47,653 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 5018
[2020-10-12 11:47:47,653 FATAL L256   erpolLogProxyWrapper]: Heuristic: BIGGEST
[2020-10-12 11:47:47,653 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 28
[2020-10-12 11:47:47,653 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 32
[2020-10-12 11:47:47,654 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 979
[2020-10-12 11:47:47,654 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-10-12 11:47:51,400 WARN  L193               SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 39
[2020-10-12 11:47:51,582 WARN  L193               SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 39
[2020-10-12 11:47:51,876 WARN  L193               SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 45
[2020-10-12 11:47:52,114 WARN  L193               SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 44
[2020-10-12 11:47:52,261 WARN  L193               SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 35
[2020-10-12 11:47:53,210 WARN  L193               SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 36
[2020-10-12 11:47:53,284 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-10-12 11:47:53,286 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-12 11:47:53,287 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-12 11:47:53,289 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-10-12 11:47:53,290 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 8
[2020-10-12 11:47:53,290 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-10-12 11:47:53,290 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 3
[2020-10-12 11:47:53,290 FATAL L256   erpolLogProxyWrapper]: Heuristic: BIGGEST
[2020-10-12 11:47:53,291 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-10-12 11:47:53,291 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 1
[2020-10-12 11:47:53,291 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-10-12 11:47:53,291 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-10-12 11:47:53,345 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8
[2020-10-12 11:47:53,352 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-12 11:47:53,356 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-12 11:47:53,374 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-10-12 11:47:53,375 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 23
[2020-10-12 11:47:53,375 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-10-12 11:47:53,375 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 21
[2020-10-12 11:47:53,375 FATAL L256   erpolLogProxyWrapper]: Heuristic: BIGGEST
[2020-10-12 11:47:53,376 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 2
[2020-10-12 11:47:53,376 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 1
[2020-10-12 11:47:53,376 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 17
[2020-10-12 11:47:53,376 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-10-12 11:48:07,628 INFO  L134       CoverageAnalysis]: Checked inductivity of 19 backedges. 18 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-10-12 11:48:07,629 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1626003820]
[2020-10-12 11:48:07,629 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-10-12 11:48:07,630 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21
[2020-10-12 11:48:07,630 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310311460]
[2020-10-12 11:48:07,632 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 21 states
[2020-10-12 11:48:07,632 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-10-12 11:48:07,632 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants.
[2020-10-12 11:48:07,633 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=368, Unknown=0, NotChecked=0, Total=420
[2020-10-12 11:48:07,633 INFO  L87              Difference]: Start difference. First operand 11088 states and 16323 transitions. Second operand 21 states.
[2020-10-12 11:48:16,721 WARN  L193               SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 69
[2020-10-12 11:48:17,009 WARN  L193               SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 77
[2020-10-12 11:48:18,265 WARN  L193               SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 78
[2020-10-12 11:48:21,180 WARN  L193               SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 77
[2020-10-12 11:48:23,455 WARN  L193               SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 74
[2020-10-12 11:48:26,132 WARN  L193               SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 68
[2020-10-12 11:48:26,406 WARN  L193               SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 77
[2020-10-12 11:48:30,121 WARN  L193               SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 76
[2020-10-12 11:48:34,521 WARN  L193               SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 72
[2020-10-12 11:48:35,214 WARN  L193               SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 62
[2020-10-12 11:48:35,433 WARN  L193               SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 65
[2020-10-12 11:48:44,268 WARN  L193               SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 64
[2020-10-12 11:48:44,507 WARN  L193               SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 67
[2020-10-12 11:49:04,982 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-10-12 11:49:04,983 INFO  L93              Difference]: Finished difference Result 23146 states and 34641 transitions.
[2020-10-12 11:49:04,984 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. 
[2020-10-12 11:49:04,985 INFO  L78                 Accepts]: Start accepts. Automaton has 21 states. Word has length 1734
[2020-10-12 11:49:04,986 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-10-12 11:49:05,027 INFO  L225             Difference]: With dead ends: 23146
[2020-10-12 11:49:05,028 INFO  L226             Difference]: Without dead ends: 12064
[2020-10-12 11:49:05,049 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=180, Invalid=1080, Unknown=0, NotChecked=0, Total=1260
[2020-10-12 11:49:05,065 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 12064 states.
[2020-10-12 11:49:05,256 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 12064 to 12056.
[2020-10-12 11:49:05,256 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 12056 states.
[2020-10-12 11:49:05,275 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 12056 states to 12056 states and 17307 transitions.
[2020-10-12 11:49:05,276 INFO  L78                 Accepts]: Start accepts. Automaton has 12056 states and 17307 transitions. Word has length 1734
[2020-10-12 11:49:05,277 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-10-12 11:49:05,277 INFO  L479      AbstractCegarLoop]: Abstraction has 12056 states and 17307 transitions.
[2020-10-12 11:49:05,277 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 21 states.
[2020-10-12 11:49:05,277 INFO  L276                IsEmpty]: Start isEmpty. Operand 12056 states and 17307 transitions.
[2020-10-12 11:49:05,329 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 1739
[2020-10-12 11:49:05,329 INFO  L414         BasicCegarLoop]: Found error trace
[2020-10-12 11:49:05,331 INFO  L422         BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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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[2020-10-12 11:49:05,331 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3
[2020-10-12 11:49:05,331 INFO  L427      AbstractCegarLoop]: === Iteration 5 === [calculate_output8Err0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-10-12 11:49:05,332 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-10-12 11:49:05,332 INFO  L82        PathProgramCache]: Analyzing trace with hash -1256136318, now seen corresponding path program 1 times
[2020-10-12 11:49:05,333 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-10-12 11:49:05,334 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1983700261]
[2020-10-12 11:49:05,334 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-10-12 11:49:05,450 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-12 11:49:05,478 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-12 11:49:05,640 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-12 11:49:06,221 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-12 11:49:09,337 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-12 11:49:10,458 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-10-12 11:49:10,458 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 1762
[2020-10-12 11:49:10,458 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 4
[2020-10-12 11:49:10,459 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 5004
[2020-10-12 11:49:10,459 FATAL L256   erpolLogProxyWrapper]: Heuristic: BIGGEST
[2020-10-12 11:49:10,459 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 18
[2020-10-12 11:49:10,459 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 35
[2020-10-12 11:49:10,459 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 1726
[2020-10-12 11:49:10,460 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-10-12 11:49:11,256 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-10-12 11:49:11,262 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-12 11:49:11,263 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-12 11:49:11,265 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-10-12 11:49:11,265 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 8
[2020-10-12 11:49:11,265 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-10-12 11:49:11,265 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 2
[2020-10-12 11:49:11,266 FATAL L256   erpolLogProxyWrapper]: Heuristic: BIGGEST
[2020-10-12 11:49:11,266 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-10-12 11:49:11,266 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 1
[2020-10-12 11:49:11,266 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-10-12 11:49:11,266 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-10-12 11:49:11,286 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8
[2020-10-12 11:49:11,291 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-12 11:49:11,295 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-12 11:49:11,305 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-12 11:49:11,317 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-10-12 11:49:11,317 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 27
[2020-10-12 11:49:11,318 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 2
[2020-10-12 11:49:11,318 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 25
[2020-10-12 11:49:11,318 FATAL L256   erpolLogProxyWrapper]: Heuristic: BIGGEST
[2020-10-12 11:49:11,318 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 2
[2020-10-12 11:49:11,318 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 19
[2020-10-12 11:49:11,318 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 2
[2020-10-12 11:49:11,318 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-10-12 11:49:13,471 INFO  L134       CoverageAnalysis]: Checked inductivity of 21 backedges. 20 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-10-12 11:49:13,472 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1983700261]
[2020-10-12 11:49:13,472 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-10-12 11:49:13,472 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6
[2020-10-12 11:49:13,473 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521141081]
[2020-10-12 11:49:13,474 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 6 states
[2020-10-12 11:49:13,474 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-10-12 11:49:13,475 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2020-10-12 11:49:13,475 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30
[2020-10-12 11:49:13,475 INFO  L87              Difference]: Start difference. First operand 12056 states and 17307 transitions. Second operand 6 states.