/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_label46.c


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


This is Ultimate 0.1.25-adbd35c
[2020-10-13 06:55:20,164 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2020-10-13 06:55:20,167 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2020-10-13 06:55:20,191 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2020-10-13 06:55:20,191 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2020-10-13 06:55:20,192 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2020-10-13 06:55:20,194 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2020-10-13 06:55:20,196 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2020-10-13 06:55:20,198 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2020-10-13 06:55:20,198 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
[2020-10-13 06:55:20,199 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
[2020-10-13 06:55:20,200 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2020-10-13 06:55:20,201 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2020-10-13 06:55:20,202 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2020-10-13 06:55:20,207 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2020-10-13 06:55:20,208 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2020-10-13 06:55:20,209 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2020-10-13 06:55:20,210 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2020-10-13 06:55:20,212 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2020-10-13 06:55:20,214 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2020-10-13 06:55:20,215 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2020-10-13 06:55:20,217 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2020-10-13 06:55:20,218 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2020-10-13 06:55:20,218 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2020-10-13 06:55:20,221 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2020-10-13 06:55:20,221 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2020-10-13 06:55:20,222 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2020-10-13 06:55:20,223 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2020-10-13 06:55:20,223 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2020-10-13 06:55:20,224 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2020-10-13 06:55:20,224 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2020-10-13 06:55:20,225 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2020-10-13 06:55:20,226 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2020-10-13 06:55:20,227 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2020-10-13 06:55:20,228 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2020-10-13 06:55:20,228 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
[2020-10-13 06:55:20,229 INFO  L184        SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2020-10-13 06:55:20,229 INFO  L184        SettingsManager]: ReqParser provides no preferences, ignoring...
[2020-10-13 06:55:20,229 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
[2020-10-13 06:55:20,230 INFO  L181        SettingsManager]: Resetting Witness Parser preferences to default values
[2020-10-13 06:55:20,231 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2020-10-13 06:55:20,232 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 06:55:20,254 INFO  L113        SettingsManager]: Loading preferences was successful
[2020-10-13 06:55:20,255 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2020-10-13 06:55:20,256 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2020-10-13 06:55:20,256 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2020-10-13 06:55:20,256 INFO  L138        SettingsManager]:  * Use SBE=true
[2020-10-13 06:55:20,257 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2020-10-13 06:55:20,257 INFO  L138        SettingsManager]:  * sizeof long=4
[2020-10-13 06:55:20,257 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2020-10-13 06:55:20,257 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2020-10-13 06:55:20,257 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2020-10-13 06:55:20,257 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2020-10-13 06:55:20,258 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2020-10-13 06:55:20,258 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2020-10-13 06:55:20,258 INFO  L138        SettingsManager]:  * sizeof long double=12
[2020-10-13 06:55:20,258 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2020-10-13 06:55:20,258 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2020-10-13 06:55:20,258 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2020-10-13 06:55:20,259 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2020-10-13 06:55:20,259 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2020-10-13 06:55:20,259 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2020-10-13 06:55:20,259 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2020-10-13 06:55:20,259 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-10-13 06:55:20,260 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2020-10-13 06:55:20,260 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2020-10-13 06:55:20,260 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2020-10-13 06:55:20,260 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2020-10-13 06:55:20,260 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-10-13 06:55:20,261 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2020-10-13 06:55:20,261 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2020-10-13 06:55:20,261 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 06:55:20,601 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2020-10-13 06:55:20,621 INFO  L258   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2020-10-13 06:55:20,625 INFO  L214   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2020-10-13 06:55:20,628 INFO  L271        PluginConnector]: Initializing CDTParser...
[2020-10-13 06:55:20,630 INFO  L275        PluginConnector]: CDTParser initialized
[2020-10-13 06:55:20,630 INFO  L429   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem05_label46.c
[2020-10-13 06:55:20,708 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0fb30e9aa/139b3d33b7ea462c8b9422d49fa74daf/FLAGc6c89570e
[2020-10-13 06:55:21,680 INFO  L306              CDTParser]: Found 1 translation units.
[2020-10-13 06:55:21,681 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem05_label46.c
[2020-10-13 06:55:21,741 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0fb30e9aa/139b3d33b7ea462c8b9422d49fa74daf/FLAGc6c89570e
[2020-10-13 06:55:22,052 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0fb30e9aa/139b3d33b7ea462c8b9422d49fa74daf
[2020-10-13 06:55:22,063 INFO  L296   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2020-10-13 06:55:22,065 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2020-10-13 06:55:22,066 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2020-10-13 06:55:22,066 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2020-10-13 06:55:22,070 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2020-10-13 06:55:22,071 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:55:22" (1/1) ...
[2020-10-13 06:55:22,074 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@72dcb5c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:55:22, skipping insertion in model container
[2020-10-13 06:55:22,074 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:55:22" (1/1) ...
[2020-10-13 06:55:22,082 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2020-10-13 06:55:22,376 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2020-10-13 06:55:24,929 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-10-13 06:55:24,937 INFO  L203         MainTranslator]: Completed pre-run
[2020-10-13 06:55:26,257 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-10-13 06:55:26,328 INFO  L208         MainTranslator]: Completed translation
[2020-10-13 06:55:26,329 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:55:26 WrapperNode
[2020-10-13 06:55:26,329 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2020-10-13 06:55:26,330 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2020-10-13 06:55:26,330 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2020-10-13 06:55:26,330 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2020-10-13 06:55:26,346 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:55:26" (1/1) ...
[2020-10-13 06:55:26,348 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:55:26" (1/1) ...
[2020-10-13 06:55:26,434 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:55:26" (1/1) ...
[2020-10-13 06:55:26,435 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:55:26" (1/1) ...
[2020-10-13 06:55:26,600 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:55:26" (1/1) ...
[2020-10-13 06:55:26,674 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:55:26" (1/1) ...
[2020-10-13 06:55:26,847 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:55:26" (1/1) ...
[2020-10-13 06:55:26,900 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2020-10-13 06:55:26,901 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2020-10-13 06:55:26,901 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2020-10-13 06:55:26,901 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2020-10-13 06:55:26,903 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:55:26" (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 06:55:26,974 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2020-10-13 06:55:26,974 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2020-10-13 06:55:26,975 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output
[2020-10-13 06:55:26,975 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output2
[2020-10-13 06:55:26,975 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output3
[2020-10-13 06:55:26,975 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output4
[2020-10-13 06:55:26,975 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output5
[2020-10-13 06:55:26,977 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output6
[2020-10-13 06:55:26,977 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output7
[2020-10-13 06:55:26,977 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output8
[2020-10-13 06:55:26,978 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2020-10-13 06:55:26,978 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output
[2020-10-13 06:55:26,978 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output2
[2020-10-13 06:55:26,980 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output3
[2020-10-13 06:55:26,980 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output4
[2020-10-13 06:55:26,983 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output5
[2020-10-13 06:55:26,983 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output6
[2020-10-13 06:55:26,983 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output7
[2020-10-13 06:55:26,983 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output8
[2020-10-13 06:55:26,984 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2020-10-13 06:55:26,984 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int
[2020-10-13 06:55:26,984 INFO  L130     BoogieDeclarations]: Found specification of procedure exit
[2020-10-13 06:55:26,984 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2020-10-13 06:55:26,984 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2020-10-13 06:55:26,985 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2020-10-13 06:55:36,428 INFO  L290             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2020-10-13 06:55:36,429 INFO  L295             CfgBuilder]: Removed 1 assume(true) statements.
[2020-10-13 06:55:36,448 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:55:36 BoogieIcfgContainer
[2020-10-13 06:55:36,448 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2020-10-13 06:55:36,449 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2020-10-13 06:55:36,450 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2020-10-13 06:55:36,453 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2020-10-13 06:55:36,453 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 06:55:22" (1/3) ...
[2020-10-13 06:55:36,454 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53f354de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:55:36, skipping insertion in model container
[2020-10-13 06:55:36,454 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:55:26" (2/3) ...
[2020-10-13 06:55:36,455 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53f354de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:55:36, skipping insertion in model container
[2020-10-13 06:55:36,455 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:55:36" (3/3) ...
[2020-10-13 06:55:36,456 INFO  L109   eAbstractionObserver]: Analyzing ICFG Problem05_label46.c
[2020-10-13 06:55:36,467 INFO  L157   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION
[2020-10-13 06:55:36,476 INFO  L169   ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2020-10-13 06:55:36,489 INFO  L251      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2020-10-13 06:55:36,520 INFO  L375      AbstractCegarLoop]: Interprodecural is true
[2020-10-13 06:55:36,520 INFO  L376      AbstractCegarLoop]: Hoare is true
[2020-10-13 06:55:36,521 INFO  L377      AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation
[2020-10-13 06:55:36,521 INFO  L378      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2020-10-13 06:55:36,521 INFO  L379      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2020-10-13 06:55:36,521 INFO  L380      AbstractCegarLoop]: Difference is false
[2020-10-13 06:55:36,521 INFO  L381      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2020-10-13 06:55:36,521 INFO  L385      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2020-10-13 06:55:36,573 INFO  L276                IsEmpty]: Start isEmpty. Operand 2222 states.
[2020-10-13 06:55:36,691 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 1711
[2020-10-13 06:55:36,692 INFO  L414         BasicCegarLoop]: Found error trace
[2020-10-13 06:55:36,694 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]
[2020-10-13 06:55:36,695 INFO  L427      AbstractCegarLoop]: === Iteration 1 === [calculate_output8Err0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-10-13 06:55:36,701 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-10-13 06:55:36,703 INFO  L82        PathProgramCache]: Analyzing trace with hash 1070221185, now seen corresponding path program 1 times
[2020-10-13 06:55:36,710 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-10-13 06:55:36,711 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1516466285]
[2020-10-13 06:55:36,712 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-10-13 06:55:37,846 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-13 06:55:38,341 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-13 06:55:43,009 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-10-13 06:55:43,010 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 1732
[2020-10-13 06:55:43,010 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-10-13 06:55:43,010 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 5153
[2020-10-13 06:55:43,012 FATAL L256   erpolLogProxyWrapper]: Heuristic: NARROWEST
[2020-10-13 06:55:43,013 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 20
[2020-10-13 06:55:43,013 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 5
[2020-10-13 06:55:43,013 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 1726
[2020-10-13 06:55:43,013 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 2
[2020-10-13 06:55:44,699 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-10-13 06:55:44,709 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-13 06:55:44,713 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-13 06:55:44,735 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-10-13 06:55:44,736 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 8
[2020-10-13 06:55:44,736 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-10-13 06:55:44,737 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 25
[2020-10-13 06:55:44,737 FATAL L256   erpolLogProxyWrapper]: Heuristic: NARROWEST
[2020-10-13 06:55:44,738 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 2
[2020-10-13 06:55:44,738 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 1
[2020-10-13 06:55:44,738 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 2
[2020-10-13 06:55:44,739 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-10-13 06:55:47,656 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 06:55:47,656 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1516466285]
[2020-10-13 06:55:47,658 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-10-13 06:55:47,658 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-10-13 06:55:47,659 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693245229]
[2020-10-13 06:55:47,667 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 5 states
[2020-10-13 06:55:47,668 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-10-13 06:55:47,679 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2020-10-13 06:55:47,680 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20
[2020-10-13 06:55:47,682 INFO  L87              Difference]: Start difference. First operand 2222 states. Second operand 5 states.
[2020-10-13 06:56:16,216 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-10-13 06:56:16,217 INFO  L93              Difference]: Finished difference Result 8125 states and 15405 transitions.
[2020-10-13 06:56:16,218 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2020-10-13 06:56:16,220 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 1710
[2020-10-13 06:56:16,229 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-10-13 06:56:16,288 INFO  L225             Difference]: With dead ends: 8125
[2020-10-13 06:56:16,288 INFO  L226             Difference]: Without dead ends: 5835
[2020-10-13 06:56:16,300 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42
[2020-10-13 06:56:16,329 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 5835 states.
[2020-10-13 06:56:16,529 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 5835 to 5801.
[2020-10-13 06:56:16,530 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 5801 states.
[2020-10-13 06:56:16,559 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5801 states to 5801 states and 9384 transitions.
[2020-10-13 06:56:16,561 INFO  L78                 Accepts]: Start accepts. Automaton has 5801 states and 9384 transitions. Word has length 1710
[2020-10-13 06:56:16,565 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-10-13 06:56:16,565 INFO  L479      AbstractCegarLoop]: Abstraction has 5801 states and 9384 transitions.
[2020-10-13 06:56:16,565 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2020-10-13 06:56:16,565 INFO  L276                IsEmpty]: Start isEmpty. Operand 5801 states and 9384 transitions.
[2020-10-13 06:56:16,688 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 1735
[2020-10-13 06:56:16,688 INFO  L414         BasicCegarLoop]: Found error trace
[2020-10-13 06:56:16,690 INFO  L422         BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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, 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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]
[2020-10-13 06:56:16,690 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2020-10-13 06:56:16,691 INFO  L427      AbstractCegarLoop]: === Iteration 2 === [calculate_output8Err0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-10-13 06:56:16,691 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-10-13 06:56:16,692 INFO  L82        PathProgramCache]: Analyzing trace with hash -722626066, now seen corresponding path program 1 times
[2020-10-13 06:56:16,692 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-10-13 06:56:16,693 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1827274859]
[2020-10-13 06:56:16,693 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-10-13 06:56:16,809 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-13 06:56:16,843 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-13 06:56:16,925 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-13 06:56:17,300 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-13 06:56:21,918 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-10-13 06:56:21,918 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 1760
[2020-10-13 06:56:21,919 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 3
[2020-10-13 06:56:21,919 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 5106
[2020-10-13 06:56:21,920 FATAL L256   erpolLogProxyWrapper]: Heuristic: NARROWEST
[2020-10-13 06:56:21,920 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 6
[2020-10-13 06:56:21,921 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 5
[2020-10-13 06:56:21,921 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 15
[2020-10-13 06:56:21,921 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 2
[2020-10-13 06:56:22,449 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-10-13 06:56:22,452 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-13 06:56:22,454 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-13 06:56:22,459 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-10-13 06:56:22,459 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 8
[2020-10-13 06:56:22,459 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-10-13 06:56:22,460 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 6
[2020-10-13 06:56:22,460 FATAL L256   erpolLogProxyWrapper]: Heuristic: NARROWEST
[2020-10-13 06:56:22,460 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 2
[2020-10-13 06:56:22,460 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 1
[2020-10-13 06:56:22,460 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 2
[2020-10-13 06:56:22,461 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-10-13 06:56:22,486 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8
[2020-10-13 06:56:22,489 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-13 06:56:22,492 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-13 06:56:22,506 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-10-13 06:56:22,506 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 10
[2020-10-13 06:56:22,511 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-10-13 06:56:22,511 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 15
[2020-10-13 06:56:22,511 FATAL L256   erpolLogProxyWrapper]: Heuristic: NARROWEST
[2020-10-13 06:56:22,512 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 4
[2020-10-13 06:56:22,512 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 0
[2020-10-13 06:56:22,512 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 10
[2020-10-13 06:56:22,512 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-10-13 06:56:22,571 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17
[2020-10-13 06:56:22,578 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-13 06:56:22,581 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-13 06:56:22,590 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-10-13 06:56:22,590 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 16
[2020-10-13 06:56:22,590 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-10-13 06:56:22,590 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 11
[2020-10-13 06:56:22,591 FATAL L256   erpolLogProxyWrapper]: Heuristic: NARROWEST
[2020-10-13 06:56:22,591 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-10-13 06:56:22,591 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 13
[2020-10-13 06:56:22,591 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-10-13 06:56:22,592 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-10-13 06:56:23,711 INFO  L134       CoverageAnalysis]: Checked inductivity of 27 backedges. 18 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked.
[2020-10-13 06:56:23,717 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1827274859]
[2020-10-13 06:56:23,718 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-10-13 06:56:23,718 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7
[2020-10-13 06:56:23,719 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662697572]
[2020-10-13 06:56:23,724 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 7 states
[2020-10-13 06:56:23,724 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-10-13 06:56:23,725 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2020-10-13 06:56:23,725 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42
[2020-10-13 06:56:23,725 INFO  L87              Difference]: Start difference. First operand 5801 states and 9384 transitions. Second operand 7 states.
[2020-10-13 06:56:50,847 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-10-13 06:56:50,848 INFO  L93              Difference]: Finished difference Result 17239 states and 28278 transitions.
[2020-10-13 06:56:50,853 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. 
[2020-10-13 06:56:50,853 INFO  L78                 Accepts]: Start accepts. Automaton has 7 states. Word has length 1734
[2020-10-13 06:56:50,854 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-10-13 06:56:50,910 INFO  L225             Difference]: With dead ends: 17239
[2020-10-13 06:56:50,910 INFO  L226             Difference]: Without dead ends: 11444
[2020-10-13 06:56:50,930 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110
[2020-10-13 06:56:50,943 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 11444 states.
[2020-10-13 06:56:51,192 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 11444 to 11256.
[2020-10-13 06:56:51,192 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 11256 states.
[2020-10-13 06:56:51,220 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 11256 states to 11256 states and 16457 transitions.
[2020-10-13 06:56:51,221 INFO  L78                 Accepts]: Start accepts. Automaton has 11256 states and 16457 transitions. Word has length 1734
[2020-10-13 06:56:51,222 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-10-13 06:56:51,222 INFO  L479      AbstractCegarLoop]: Abstraction has 11256 states and 16457 transitions.
[2020-10-13 06:56:51,222 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 7 states.
[2020-10-13 06:56:51,222 INFO  L276                IsEmpty]: Start isEmpty. Operand 11256 states and 16457 transitions.
[2020-10-13 06:56:51,298 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 1737
[2020-10-13 06:56:51,298 INFO  L414         BasicCegarLoop]: Found error trace
[2020-10-13 06:56:51,300 INFO  L422         BasicCegarLoop]: trace histogram [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, 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]
[2020-10-13 06:56:51,300 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2020-10-13 06:56:51,300 INFO  L427      AbstractCegarLoop]: === Iteration 3 === [calculate_output8Err0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-10-13 06:56:51,300 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-10-13 06:56:51,301 INFO  L82        PathProgramCache]: Analyzing trace with hash -2032997486, now seen corresponding path program 1 times
[2020-10-13 06:56:51,301 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-10-13 06:56:51,302 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1898868430]
[2020-10-13 06:56:51,302 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-10-13 06:56:51,477 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-13 06:56:51,559 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-13 06:56:52,133 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-13 06:56:56,591 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-10-13 06:56:56,592 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 1762
[2020-10-13 06:56:56,592 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 2
[2020-10-13 06:56:56,592 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 5110
[2020-10-13 06:56:56,592 FATAL L256   erpolLogProxyWrapper]: Heuristic: NARROWEST
[2020-10-13 06:56:56,592 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 4
[2020-10-13 06:56:56,592 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 21
[2020-10-13 06:56:56,592 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 18
[2020-10-13 06:56:56,593 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-10-13 06:56:57,344 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-10-13 06:56:57,347 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-13 06:56:57,348 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-13 06:56:57,352 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-10-13 06:56:57,352 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 8
[2020-10-13 06:56:57,353 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-10-13 06:56:57,353 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 4
[2020-10-13 06:56:57,354 FATAL L256   erpolLogProxyWrapper]: Heuristic: NARROWEST
[2020-10-13 06:56:57,354 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-10-13 06:56:57,354 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 1
[2020-10-13 06:56:57,355 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-10-13 06:56:57,355 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-10-13 06:56:57,389 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8
[2020-10-13 06:56:57,393 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-13 06:56:57,396 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-13 06:56:57,412 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-10-13 06:56:57,412 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 12
[2020-10-13 06:56:57,412 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-10-13 06:56:57,413 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 18
[2020-10-13 06:56:57,413 FATAL L256   erpolLogProxyWrapper]: Heuristic: NARROWEST
[2020-10-13 06:56:57,413 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 2
[2020-10-13 06:56:57,414 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 1
[2020-10-13 06:56:57,414 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 6
[2020-10-13 06:56:57,415 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-10-13 06:56:57,422 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19
[2020-10-13 06:56:57,428 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-13 06:56:57,433 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-13 06:56:57,473 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-10-13 06:56:57,473 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 16
[2020-10-13 06:56:57,473 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-10-13 06:56:57,474 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 44
[2020-10-13 06:56:57,474 FATAL L256   erpolLogProxyWrapper]: Heuristic: NARROWEST
[2020-10-13 06:56:57,474 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 4
[2020-10-13 06:56:57,474 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 0
[2020-10-13 06:56:57,474 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 16
[2020-10-13 06:56:57,475 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-10-13 06:56:58,734 INFO  L134       CoverageAnalysis]: Checked inductivity of 31 backedges. 28 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2020-10-13 06:56:58,734 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1898868430]
[2020-10-13 06:56:58,734 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-10-13 06:56:58,735 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7
[2020-10-13 06:56:58,735 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351398101]
[2020-10-13 06:56:58,737 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 7 states
[2020-10-13 06:56:58,738 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-10-13 06:56:58,738 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2020-10-13 06:56:58,738 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42
[2020-10-13 06:56:58,744 INFO  L87              Difference]: Start difference. First operand 11256 states and 16457 transitions. Second operand 7 states.
[2020-10-13 06:57:25,976 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-10-13 06:57:25,977 INFO  L93              Difference]: Finished difference Result 33947 states and 51612 transitions.
[2020-10-13 06:57:25,978 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2020-10-13 06:57:25,978 INFO  L78                 Accepts]: Start accepts. Automaton has 7 states. Word has length 1736
[2020-10-13 06:57:25,978 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-10-13 06:57:26,071 INFO  L225             Difference]: With dead ends: 33947
[2020-10-13 06:57:26,072 INFO  L226             Difference]: Without dead ends: 22697
[2020-10-13 06:57:26,109 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132
[2020-10-13 06:57:26,147 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 22697 states.
[2020-10-13 06:57:26,621 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 22697 to 22451.
[2020-10-13 06:57:26,621 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 22451 states.
[2020-10-13 06:57:26,666 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 22451 states to 22451 states and 31294 transitions.
[2020-10-13 06:57:26,666 INFO  L78                 Accepts]: Start accepts. Automaton has 22451 states and 31294 transitions. Word has length 1736
[2020-10-13 06:57:26,667 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-10-13 06:57:26,667 INFO  L479      AbstractCegarLoop]: Abstraction has 22451 states and 31294 transitions.
[2020-10-13 06:57:26,667 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 7 states.
[2020-10-13 06:57:26,667 INFO  L276                IsEmpty]: Start isEmpty. Operand 22451 states and 31294 transitions.
[2020-10-13 06:57:26,766 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 1751
[2020-10-13 06:57:26,767 INFO  L414         BasicCegarLoop]: Found error trace
[2020-10-13 06:57:26,768 INFO  L422         BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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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]
[2020-10-13 06:57:26,768 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2020-10-13 06:57:26,769 INFO  L427      AbstractCegarLoop]: === Iteration 4 === [calculate_output8Err0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-10-13 06:57:26,769 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-10-13 06:57:26,769 INFO  L82        PathProgramCache]: Analyzing trace with hash -842262064, now seen corresponding path program 1 times
[2020-10-13 06:57:26,770 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-10-13 06:57:26,770 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1321401002]
[2020-10-13 06:57:26,771 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-10-13 06:57:26,885 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-13 06:57:26,914 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-13 06:57:27,290 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-13 06:57:32,030 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-10-13 06:57:32,030 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 1774
[2020-10-13 06:57:32,030 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 2
[2020-10-13 06:57:32,030 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 5141
[2020-10-13 06:57:32,031 FATAL L256   erpolLogProxyWrapper]: Heuristic: NARROWEST
[2020-10-13 06:57:32,031 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 6
[2020-10-13 06:57:32,031 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 5
[2020-10-13 06:57:32,031 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 46
[2020-10-13 06:57:32,031 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-10-13 06:57:32,329 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-10-13 06:57:32,332 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-13 06:57:32,333 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-13 06:57:32,336 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-10-13 06:57:32,337 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 8
[2020-10-13 06:57:32,337 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-10-13 06:57:32,337 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 4
[2020-10-13 06:57:32,337 FATAL L256   erpolLogProxyWrapper]: Heuristic: NARROWEST
[2020-10-13 06:57:32,337 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 2
[2020-10-13 06:57:32,337 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 1
[2020-10-13 06:57:32,337 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 2
[2020-10-13 06:57:32,337 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-10-13 06:57:32,358 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8
[2020-10-13 06:57:32,366 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-13 06:57:32,371 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-13 06:57:32,413 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-10-13 06:57:32,413 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 41
[2020-10-13 06:57:32,414 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-10-13 06:57:32,414 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 46
[2020-10-13 06:57:32,414 FATAL L256   erpolLogProxyWrapper]: Heuristic: NARROWEST
[2020-10-13 06:57:32,414 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 4
[2020-10-13 06:57:32,414 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 0
[2020-10-13 06:57:32,415 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 41
[2020-10-13 06:57:32,415 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-10-13 06:57:33,725 INFO  L134       CoverageAnalysis]: Checked inductivity of 37 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-10-13 06:57:33,726 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1321401002]
[2020-10-13 06:57:33,726 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-10-13 06:57:33,726 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6
[2020-10-13 06:57:33,727 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802520935]
[2020-10-13 06:57:33,728 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 7 states
[2020-10-13 06:57:33,729 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-10-13 06:57:33,729 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2020-10-13 06:57:33,729 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42
[2020-10-13 06:57:33,730 INFO  L87              Difference]: Start difference. First operand 22451 states and 31294 transitions. Second operand 7 states.
[2020-10-13 06:58:01,639 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-10-13 06:58:01,639 INFO  L93              Difference]: Finished difference Result 68426 states and 104193 transitions.
[2020-10-13 06:58:01,640 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. 
[2020-10-13 06:58:01,640 INFO  L78                 Accepts]: Start accepts. Automaton has 7 states. Word has length 1750
[2020-10-13 06:58:01,640 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-10-13 06:58:01,844 INFO  L225             Difference]: With dead ends: 68426
[2020-10-13 06:58:01,844 INFO  L226             Difference]: Without dead ends: 45981
[2020-10-13 06:58:01,942 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132
[2020-10-13 06:58:01,998 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 45981 states.
[2020-10-13 06:58:03,183 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 45981 to 45246.
[2020-10-13 06:58:03,183 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 45246 states.
[2020-10-13 06:58:05,481 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 45246 states to 45246 states and 65085 transitions.
[2020-10-13 06:58:05,481 INFO  L78                 Accepts]: Start accepts. Automaton has 45246 states and 65085 transitions. Word has length 1750
[2020-10-13 06:58:05,482 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-10-13 06:58:05,482 INFO  L479      AbstractCegarLoop]: Abstraction has 45246 states and 65085 transitions.
[2020-10-13 06:58:05,482 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 7 states.
[2020-10-13 06:58:05,482 INFO  L276                IsEmpty]: Start isEmpty. Operand 45246 states and 65085 transitions.
[2020-10-13 06:58:05,624 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 1752
[2020-10-13 06:58:05,625 INFO  L414         BasicCegarLoop]: Found error trace
[2020-10-13 06:58:05,628 INFO  L422         BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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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]
[2020-10-13 06:58:05,628 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3
[2020-10-13 06:58:05,628 INFO  L427      AbstractCegarLoop]: === Iteration 5 === [calculate_output8Err0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-10-13 06:58:05,629 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-10-13 06:58:05,630 INFO  L82        PathProgramCache]: Analyzing trace with hash 2022691848, now seen corresponding path program 1 times
[2020-10-13 06:58:05,630 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-10-13 06:58:05,630 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1831944133]
[2020-10-13 06:58:05,631 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-10-13 06:58:06,070 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-13 06:58:06,376 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-13 06:58:07,964 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-13 06:58:11,095 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-10-13 06:58:11,096 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 1775
[2020-10-13 06:58:11,096 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 2
[2020-10-13 06:58:11,096 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 5019
[2020-10-13 06:58:11,096 FATAL L256   erpolLogProxyWrapper]: Heuristic: NARROWEST
[2020-10-13 06:58:11,096 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 6
[2020-10-13 06:58:11,097 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 5
[2020-10-13 06:58:11,097 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 47
[2020-10-13 06:58:11,097 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-10-13 06:58:11,497 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-10-13 06:58:11,501 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-13 06:58:11,503 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-13 06:58:11,508 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-10-13 06:58:11,508 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 8
[2020-10-13 06:58:11,508 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-10-13 06:58:11,508 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 6
[2020-10-13 06:58:11,508 FATAL L256   erpolLogProxyWrapper]: Heuristic: NARROWEST
[2020-10-13 06:58:11,509 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 2
[2020-10-13 06:58:11,509 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 1
[2020-10-13 06:58:11,509 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 2
[2020-10-13 06:58:11,509 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-10-13 06:58:11,534 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8
[2020-10-13 06:58:11,545 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-13 06:58:11,552 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-13 06:58:11,591 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-10-13 06:58:11,591 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 42
[2020-10-13 06:58:11,591 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-10-13 06:58:11,591 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 45
[2020-10-13 06:58:11,592 FATAL L256   erpolLogProxyWrapper]: Heuristic: NARROWEST
[2020-10-13 06:58:11,592 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 4
[2020-10-13 06:58:11,592 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 0
[2020-10-13 06:58:11,592 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 42
[2020-10-13 06:58:11,592 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-10-13 06:58:12,865 INFO  L134       CoverageAnalysis]: Checked inductivity of 38 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-10-13 06:58:12,865 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1831944133]
[2020-10-13 06:58:12,865 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-10-13 06:58:12,866 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2020-10-13 06:58:12,866 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429934355]
[2020-10-13 06:58:12,867 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 8 states
[2020-10-13 06:58:12,867 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-10-13 06:58:12,867 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2020-10-13 06:58:12,868 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56
[2020-10-13 06:58:12,868 INFO  L87              Difference]: Start difference. First operand 45246 states and 65085 transitions. Second operand 8 states.
[2020-10-13 06:58:54,752 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-10-13 06:58:54,752 INFO  L93              Difference]: Finished difference Result 134213 states and 222792 transitions.
[2020-10-13 06:58:54,753 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. 
[2020-10-13 06:58:54,754 INFO  L78                 Accepts]: Start accepts. Automaton has 8 states. Word has length 1751
[2020-10-13 06:58:54,754 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-10-13 06:58:55,210 INFO  L225             Difference]: With dead ends: 134213
[2020-10-13 06:58:55,211 INFO  L226             Difference]: Without dead ends: 88973
[2020-10-13 06:58:55,331 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182
[2020-10-13 06:58:55,429 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 88973 states.
[2020-10-13 06:58:57,912 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 88973 to 88162.
[2020-10-13 06:58:57,912 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 88162 states.
[2020-10-13 06:58:58,115 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 88162 states to 88162 states and 134053 transitions.
[2020-10-13 06:58:58,115 INFO  L78                 Accepts]: Start accepts. Automaton has 88162 states and 134053 transitions. Word has length 1751
[2020-10-13 06:58:58,116 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-10-13 06:58:58,116 INFO  L479      AbstractCegarLoop]: Abstraction has 88162 states and 134053 transitions.
[2020-10-13 06:58:58,116 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 8 states.
[2020-10-13 06:58:58,116 INFO  L276                IsEmpty]: Start isEmpty. Operand 88162 states and 134053 transitions.
[2020-10-13 06:58:58,398 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 1809
[2020-10-13 06:58:58,398 INFO  L414         BasicCegarLoop]: Found error trace
[2020-10-13 06:58:58,399 INFO  L422         BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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[2020-10-13 06:58:58,400 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4
[2020-10-13 06:58:58,400 INFO  L427      AbstractCegarLoop]: === Iteration 6 === [calculate_output8Err0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-10-13 06:58:58,400 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-10-13 06:58:58,401 INFO  L82        PathProgramCache]: Analyzing trace with hash -1908078417, now seen corresponding path program 1 times
[2020-10-13 06:58:58,401 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-10-13 06:58:58,401 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1952981529]
[2020-10-13 06:58:58,402 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-10-13 06:58:58,524 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-13 06:58:58,571 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-13 06:58:58,645 FATAL L256   erpolLogProxyWrapper]: Now shrinking...