/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_label13.c


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


This is Ultimate 0.1.25-adbd35c
[2020-10-12 11:49:11,725 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2020-10-12 11:49:11,728 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2020-10-12 11:49:11,770 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2020-10-12 11:49:11,770 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2020-10-12 11:49:11,781 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2020-10-12 11:49:11,782 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2020-10-12 11:49:11,784 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2020-10-12 11:49:11,788 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2020-10-12 11:49:11,789 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
[2020-10-12 11:49:11,790 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
[2020-10-12 11:49:11,792 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2020-10-12 11:49:11,793 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2020-10-12 11:49:11,797 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2020-10-12 11:49:11,799 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2020-10-12 11:49:11,799 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2020-10-12 11:49:11,800 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2020-10-12 11:49:11,801 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2020-10-12 11:49:11,805 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2020-10-12 11:49:11,811 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2020-10-12 11:49:11,813 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2020-10-12 11:49:11,814 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2020-10-12 11:49:11,816 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2020-10-12 11:49:11,818 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2020-10-12 11:49:11,822 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2020-10-12 11:49:11,822 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2020-10-12 11:49:11,822 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2020-10-12 11:49:11,824 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2020-10-12 11:49:11,825 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2020-10-12 11:49:11,827 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2020-10-12 11:49:11,827 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2020-10-12 11:49:11,828 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2020-10-12 11:49:11,828 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2020-10-12 11:49:11,830 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2020-10-12 11:49:11,831 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2020-10-12 11:49:11,831 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
[2020-10-12 11:49:11,832 INFO  L184        SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2020-10-12 11:49:11,832 INFO  L184        SettingsManager]: ReqParser provides no preferences, ignoring...
[2020-10-12 11:49:11,832 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
[2020-10-12 11:49:11,833 INFO  L181        SettingsManager]: Resetting Witness Parser preferences to default values
[2020-10-12 11:49:11,834 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2020-10-12 11:49:11,835 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 11:49:11,876 INFO  L113        SettingsManager]: Loading preferences was successful
[2020-10-12 11:49:11,876 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2020-10-12 11:49:11,877 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2020-10-12 11:49:11,878 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2020-10-12 11:49:11,878 INFO  L138        SettingsManager]:  * Use SBE=true
[2020-10-12 11:49:11,878 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2020-10-12 11:49:11,879 INFO  L138        SettingsManager]:  * sizeof long=4
[2020-10-12 11:49:11,879 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2020-10-12 11:49:11,879 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2020-10-12 11:49:11,879 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2020-10-12 11:49:11,880 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2020-10-12 11:49:11,880 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2020-10-12 11:49:11,881 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2020-10-12 11:49:11,881 INFO  L138        SettingsManager]:  * sizeof long double=12
[2020-10-12 11:49:11,881 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2020-10-12 11:49:11,881 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2020-10-12 11:49:11,882 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2020-10-12 11:49:11,882 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2020-10-12 11:49:11,882 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2020-10-12 11:49:11,882 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2020-10-12 11:49:11,882 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2020-10-12 11:49:11,883 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-10-12 11:49:11,883 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2020-10-12 11:49:11,883 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2020-10-12 11:49:11,883 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2020-10-12 11:49:11,883 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2020-10-12 11:49:11,884 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-10-12 11:49:11,884 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2020-10-12 11:49:11,884 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2020-10-12 11:49:11,884 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 11:49:12,188 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2020-10-12 11:49:12,207 INFO  L258   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2020-10-12 11:49:12,213 INFO  L214   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2020-10-12 11:49:12,215 INFO  L271        PluginConnector]: Initializing CDTParser...
[2020-10-12 11:49:12,215 INFO  L275        PluginConnector]: CDTParser initialized
[2020-10-12 11:49:12,216 INFO  L429   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem05_label13.c
[2020-10-12 11:49:12,281 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7ff35c25e/c0614a2a4cff46d7af9ee127eaa3aa2d/FLAG38bed7922
[2020-10-12 11:49:13,218 INFO  L306              CDTParser]: Found 1 translation units.
[2020-10-12 11:49:13,219 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem05_label13.c
[2020-10-12 11:49:13,267 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7ff35c25e/c0614a2a4cff46d7af9ee127eaa3aa2d/FLAG38bed7922
[2020-10-12 11:49:13,691 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7ff35c25e/c0614a2a4cff46d7af9ee127eaa3aa2d
[2020-10-12 11:49:13,699 INFO  L296   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2020-10-12 11:49:13,701 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2020-10-12 11:49:13,702 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2020-10-12 11:49:13,702 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2020-10-12 11:49:13,706 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2020-10-12 11:49:13,707 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 11:49:13" (1/1) ...
[2020-10-12 11:49:13,710 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25d7518c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 11:49:13, skipping insertion in model container
[2020-10-12 11:49:13,710 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 11:49:13" (1/1) ...
[2020-10-12 11:49:13,718 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2020-10-12 11:49:13,955 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2020-10-12 11:49:16,214 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-10-12 11:49:16,222 INFO  L203         MainTranslator]: Completed pre-run
[2020-10-12 11:49:17,235 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-10-12 11:49:17,339 INFO  L208         MainTranslator]: Completed translation
[2020-10-12 11:49:17,340 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 11:49:17 WrapperNode
[2020-10-12 11:49:17,340 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2020-10-12 11:49:17,341 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2020-10-12 11:49:17,341 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2020-10-12 11:49:17,341 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2020-10-12 11:49:17,360 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 11:49:17" (1/1) ...
[2020-10-12 11:49:17,360 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 11:49:17" (1/1) ...
[2020-10-12 11:49:17,436 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 11:49:17" (1/1) ...
[2020-10-12 11:49:17,437 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 11:49:17" (1/1) ...
[2020-10-12 11:49:17,588 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 11:49:17" (1/1) ...
[2020-10-12 11:49:17,640 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 11:49:17" (1/1) ...
[2020-10-12 11:49:17,701 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 11:49:17" (1/1) ...
[2020-10-12 11:49:17,760 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2020-10-12 11:49:17,761 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2020-10-12 11:49:17,761 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2020-10-12 11:49:17,761 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2020-10-12 11:49:17,763 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 11:49:17" (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 11:49:17,846 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2020-10-12 11:49:17,846 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2020-10-12 11:49:17,847 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output
[2020-10-12 11:49:17,847 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output2
[2020-10-12 11:49:17,847 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output3
[2020-10-12 11:49:17,847 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output4
[2020-10-12 11:49:17,848 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output5
[2020-10-12 11:49:17,849 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output6
[2020-10-12 11:49:17,849 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output7
[2020-10-12 11:49:17,849 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output8
[2020-10-12 11:49:17,849 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2020-10-12 11:49:17,849 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output
[2020-10-12 11:49:17,850 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output2
[2020-10-12 11:49:17,850 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output3
[2020-10-12 11:49:17,850 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output4
[2020-10-12 11:49:17,851 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output5
[2020-10-12 11:49:17,851 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output6
[2020-10-12 11:49:17,851 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output7
[2020-10-12 11:49:17,852 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output8
[2020-10-12 11:49:17,852 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2020-10-12 11:49:17,852 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int
[2020-10-12 11:49:17,852 INFO  L130     BoogieDeclarations]: Found specification of procedure exit
[2020-10-12 11:49:17,853 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2020-10-12 11:49:17,853 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2020-10-12 11:49:17,853 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2020-10-12 11:49:26,506 INFO  L290             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2020-10-12 11:49:26,506 INFO  L295             CfgBuilder]: Removed 1 assume(true) statements.
[2020-10-12 11:49:26,524 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 11:49:26 BoogieIcfgContainer
[2020-10-12 11:49:26,525 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2020-10-12 11:49:26,526 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2020-10-12 11:49:26,527 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2020-10-12 11:49:26,530 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2020-10-12 11:49:26,530 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 11:49:13" (1/3) ...
[2020-10-12 11:49:26,531 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e961d82 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 11:49:26, skipping insertion in model container
[2020-10-12 11:49:26,531 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 11:49:17" (2/3) ...
[2020-10-12 11:49:26,532 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e961d82 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 11:49:26, skipping insertion in model container
[2020-10-12 11:49:26,533 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 11:49:26" (3/3) ...
[2020-10-12 11:49:26,534 INFO  L109   eAbstractionObserver]: Analyzing ICFG Problem05_label13.c
[2020-10-12 11:49:26,545 INFO  L157   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION
[2020-10-12 11:49:26,557 INFO  L169   ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2020-10-12 11:49:26,571 INFO  L251      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2020-10-12 11:49:26,606 INFO  L375      AbstractCegarLoop]: Interprodecural is true
[2020-10-12 11:49:26,607 INFO  L376      AbstractCegarLoop]: Hoare is true
[2020-10-12 11:49:26,607 INFO  L377      AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation
[2020-10-12 11:49:26,607 INFO  L378      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2020-10-12 11:49:26,607 INFO  L379      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2020-10-12 11:49:26,607 INFO  L380      AbstractCegarLoop]: Difference is false
[2020-10-12 11:49:26,607 INFO  L381      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2020-10-12 11:49:26,607 INFO  L385      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2020-10-12 11:49:26,660 INFO  L276                IsEmpty]: Start isEmpty. Operand 2222 states.
[2020-10-12 11:49:26,777 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 1659
[2020-10-12 11:49:26,778 INFO  L414         BasicCegarLoop]: Found error trace
[2020-10-12 11:49:26,781 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:49:26,782 INFO  L427      AbstractCegarLoop]: === Iteration 1 === [calculate_output8Err0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-10-12 11:49:26,788 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-10-12 11:49:26,790 INFO  L82        PathProgramCache]: Analyzing trace with hash -690348559, now seen corresponding path program 1 times
[2020-10-12 11:49:26,799 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-10-12 11:49:26,799 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1782863637]
[2020-10-12 11:49:26,800 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-10-12 11:49:27,760 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-12 11:49:28,311 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-12 11:49:32,993 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-10-12 11:49:32,993 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 1680
[2020-10-12 11:49:32,994 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-10-12 11:49:32,994 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 5223
[2020-10-12 11:49:32,996 FATAL L256   erpolLogProxyWrapper]: Heuristic: BIGGEST
[2020-10-12 11:49:32,997 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 20
[2020-10-12 11:49:32,997 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 5
[2020-10-12 11:49:32,997 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 1674
[2020-10-12 11:49:32,998 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 3
[2020-10-12 11:49:34,450 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-10-12 11:49:34,454 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-12 11:49:34,457 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-12 11:49:34,465 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-10-12 11:49:34,465 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 8
[2020-10-12 11:49:34,465 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-10-12 11:49:34,466 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 9
[2020-10-12 11:49:34,466 FATAL L256   erpolLogProxyWrapper]: Heuristic: BIGGEST
[2020-10-12 11:49:34,466 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 2
[2020-10-12 11:49:34,466 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 1
[2020-10-12 11:49:34,467 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 2
[2020-10-12 11:49:34,467 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-10-12 11:49:36,725 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 11:49:36,726 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1782863637]
[2020-10-12 11:49:36,728 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-10-12 11:49:36,728 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2020-10-12 11:49:36,729 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434330243]
[2020-10-12 11:49:36,739 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-10-12 11:49:36,739 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-10-12 11:49:36,753 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-10-12 11:49:36,754 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-10-12 11:49:36,757 INFO  L87              Difference]: Start difference. First operand 2222 states. Second operand 4 states.
[2020-10-12 11:49:53,825 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-10-12 11:49:53,826 INFO  L93              Difference]: Finished difference Result 6310 states and 11850 transitions.
[2020-10-12 11:49:53,826 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2020-10-12 11:49:53,828 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 1658
[2020-10-12 11:49:53,835 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-10-12 11:49:53,891 INFO  L225             Difference]: With dead ends: 6310
[2020-10-12 11:49:53,891 INFO  L226             Difference]: Without dead ends: 4024
[2020-10-12 11:49:53,908 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2020-10-12 11:49:53,938 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 4024 states.
[2020-10-12 11:49:54,094 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 4024 to 3997.
[2020-10-12 11:49:54,096 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 3997 states.
[2020-10-12 11:49:54,113 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 3997 states to 3997 states and 6427 transitions.
[2020-10-12 11:49:54,115 INFO  L78                 Accepts]: Start accepts. Automaton has 3997 states and 6427 transitions. Word has length 1658
[2020-10-12 11:49:54,118 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-10-12 11:49:54,119 INFO  L479      AbstractCegarLoop]: Abstraction has 3997 states and 6427 transitions.
[2020-10-12 11:49:54,119 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2020-10-12 11:49:54,119 INFO  L276                IsEmpty]: Start isEmpty. Operand 3997 states and 6427 transitions.
[2020-10-12 11:49:54,221 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 1668
[2020-10-12 11:49:54,221 INFO  L414         BasicCegarLoop]: Found error trace
[2020-10-12 11:49:54,222 INFO  L422         BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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]
[2020-10-12 11:49:54,223 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2020-10-12 11:49:54,223 INFO  L427      AbstractCegarLoop]: === Iteration 2 === [calculate_output8Err0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-10-12 11:49:54,223 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-10-12 11:49:54,224 INFO  L82        PathProgramCache]: Analyzing trace with hash 1572520550, now seen corresponding path program 1 times
[2020-10-12 11:49:54,224 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-10-12 11:49:54,225 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1774307831]
[2020-10-12 11:49:54,225 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-10-12 11:49:54,341 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-12 11:49:54,370 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-12 11:49:56,621 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-12 11:49:59,355 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-10-12 11:49:59,355 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 1691
[2020-10-12 11:49:59,356 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 2
[2020-10-12 11:49:59,356 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 5010
[2020-10-12 11:49:59,357 FATAL L256   erpolLogProxyWrapper]: Heuristic: BIGGEST
[2020-10-12 11:49:59,357 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 18
[2020-10-12 11:49:59,357 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 19
[2020-10-12 11:49:59,357 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 1671
[2020-10-12 11:49:59,358 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-10-12 11:50:01,020 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-10-12 11:50:01,028 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-12 11:50:01,030 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-12 11:50:01,034 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-10-12 11:50:01,036 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 8
[2020-10-12 11:50:01,036 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-10-12 11:50:01,036 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 5
[2020-10-12 11:50:01,037 FATAL L256   erpolLogProxyWrapper]: Heuristic: BIGGEST
[2020-10-12 11:50:01,037 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-10-12 11:50:01,037 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 1
[2020-10-12 11:50:01,038 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-10-12 11:50:01,038 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-10-12 11:50:01,074 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8
[2020-10-12 11:50:01,078 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-12 11:50:01,081 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-12 11:50:01,103 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-10-12 11:50:01,104 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 10
[2020-10-12 11:50:01,104 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-10-12 11:50:01,104 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 25
[2020-10-12 11:50:01,104 FATAL L256   erpolLogProxyWrapper]: Heuristic: BIGGEST
[2020-10-12 11:50:01,105 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 2
[2020-10-12 11:50:01,105 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 1
[2020-10-12 11:50:01,105 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 4
[2020-10-12 11:50:01,105 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-10-12 11:50:03,618 INFO  L134       CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-10-12 11:50:03,618 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1774307831]
[2020-10-12 11:50:03,619 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-10-12 11:50:03,619 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6
[2020-10-12 11:50:03,619 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367471867]
[2020-10-12 11:50:03,623 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 6 states
[2020-10-12 11:50:03,624 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-10-12 11:50:03,624 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2020-10-12 11:50:03,624 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30
[2020-10-12 11:50:03,624 INFO  L87              Difference]: Start difference. First operand 3997 states and 6427 transitions. Second operand 6 states.
[2020-10-12 11:50:32,294 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-10-12 11:50:32,295 INFO  L93              Difference]: Finished difference Result 15248 states and 24990 transitions.
[2020-10-12 11:50:32,299 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2020-10-12 11:50:32,300 INFO  L78                 Accepts]: Start accepts. Automaton has 6 states. Word has length 1667
[2020-10-12 11:50:32,300 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-10-12 11:50:32,359 INFO  L225             Difference]: With dead ends: 15248
[2020-10-12 11:50:32,359 INFO  L226             Difference]: Without dead ends: 11257
[2020-10-12 11:50:32,371 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56
[2020-10-12 11:50:32,384 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 11257 states.
[2020-10-12 11:50:32,669 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 11257 to 11123.
[2020-10-12 11:50:32,670 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 11123 states.
[2020-10-12 11:50:32,717 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 11123 states to 11123 states and 16397 transitions.
[2020-10-12 11:50:32,717 INFO  L78                 Accepts]: Start accepts. Automaton has 11123 states and 16397 transitions. Word has length 1667
[2020-10-12 11:50:32,718 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-10-12 11:50:32,718 INFO  L479      AbstractCegarLoop]: Abstraction has 11123 states and 16397 transitions.
[2020-10-12 11:50:32,718 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 6 states.
[2020-10-12 11:50:32,718 INFO  L276                IsEmpty]: Start isEmpty. Operand 11123 states and 16397 transitions.
[2020-10-12 11:50:32,795 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 1691
[2020-10-12 11:50:32,796 INFO  L414         BasicCegarLoop]: Found error trace
[2020-10-12 11:50:32,797 INFO  L422         BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:50:32,798 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2020-10-12 11:50:32,798 INFO  L427      AbstractCegarLoop]: === Iteration 3 === [calculate_output8Err0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-10-12 11:50:32,798 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-10-12 11:50:32,799 INFO  L82        PathProgramCache]: Analyzing trace with hash -419190826, now seen corresponding path program 1 times
[2020-10-12 11:50:32,799 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-10-12 11:50:32,800 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [400747015]
[2020-10-12 11:50:32,800 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-10-12 11:50:32,957 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-12 11:50:33,013 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-12 11:50:33,333 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-12 11:50:38,031 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-10-12 11:50:38,031 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 1716
[2020-10-12 11:50:38,031 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 2
[2020-10-12 11:50:38,032 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 5070
[2020-10-12 11:50:38,032 FATAL L256   erpolLogProxyWrapper]: Heuristic: BIGGEST
[2020-10-12 11:50:38,032 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 6
[2020-10-12 11:50:38,032 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 5
[2020-10-12 11:50:38,032 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 17
[2020-10-12 11:50:38,033 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-10-12 11:50:38,452 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-10-12 11:50:38,454 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-12 11:50:38,459 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-12 11:50:38,464 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-10-12 11:50:38,464 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 8
[2020-10-12 11:50:38,464 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-10-12 11:50:38,464 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 8
[2020-10-12 11:50:38,464 FATAL L256   erpolLogProxyWrapper]: Heuristic: BIGGEST
[2020-10-12 11:50:38,465 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 2
[2020-10-12 11:50:38,465 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 1
[2020-10-12 11:50:38,465 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 2
[2020-10-12 11:50:38,465 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-10-12 11:50:38,487 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8
[2020-10-12 11:50:38,490 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-12 11:50:38,502 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-12 11:50:38,529 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-10-12 11:50:38,530 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 12
[2020-10-12 11:50:38,530 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-10-12 11:50:38,530 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 33
[2020-10-12 11:50:38,530 FATAL L256   erpolLogProxyWrapper]: Heuristic: BIGGEST
[2020-10-12 11:50:38,531 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 4
[2020-10-12 11:50:38,531 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 0
[2020-10-12 11:50:38,531 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 12
[2020-10-12 11:50:38,531 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-10-12 11:50:38,562 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19
[2020-10-12 11:50:38,567 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-12 11:50:38,570 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-12 11:50:38,578 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-10-12 11:50:38,579 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 22
[2020-10-12 11:50:38,579 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-10-12 11:50:38,579 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 11
[2020-10-12 11:50:38,579 FATAL L256   erpolLogProxyWrapper]: Heuristic: BIGGEST
[2020-10-12 11:50:38,579 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-10-12 11:50:38,580 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 19
[2020-10-12 11:50:38,580 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-10-12 11:50:38,580 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-10-12 11:50:39,788 INFO  L134       CoverageAnalysis]: Checked inductivity of 37 backedges. 26 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked.
[2020-10-12 11:50:39,788 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [400747015]
[2020-10-12 11:50:39,788 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-10-12 11:50:39,789 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7
[2020-10-12 11:50:39,789 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932753886]
[2020-10-12 11:50:39,791 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 7 states
[2020-10-12 11:50:39,791 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-10-12 11:50:39,792 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2020-10-12 11:50:39,792 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42
[2020-10-12 11:50:39,792 INFO  L87              Difference]: Start difference. First operand 11123 states and 16397 transitions. Second operand 7 states.
[2020-10-12 11:51:04,040 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-10-12 11:51:04,040 INFO  L93              Difference]: Finished difference Result 33367 states and 50576 transitions.
[2020-10-12 11:51:04,049 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. 
[2020-10-12 11:51:04,049 INFO  L78                 Accepts]: Start accepts. Automaton has 7 states. Word has length 1690
[2020-10-12 11:51:04,049 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-10-12 11:51:04,137 INFO  L225             Difference]: With dead ends: 33367
[2020-10-12 11:51:04,138 INFO  L226             Difference]: Without dead ends: 22250
[2020-10-12 11:51:04,171 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132
[2020-10-12 11:51:04,195 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 22250 states.
[2020-10-12 11:51:04,632 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 22250 to 20308.
[2020-10-12 11:51:04,632 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 20308 states.
[2020-10-12 11:51:04,677 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 20308 states to 20308 states and 27070 transitions.
[2020-10-12 11:51:04,677 INFO  L78                 Accepts]: Start accepts. Automaton has 20308 states and 27070 transitions. Word has length 1690
[2020-10-12 11:51:04,678 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-10-12 11:51:04,678 INFO  L479      AbstractCegarLoop]: Abstraction has 20308 states and 27070 transitions.
[2020-10-12 11:51:04,678 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 7 states.
[2020-10-12 11:51:04,679 INFO  L276                IsEmpty]: Start isEmpty. Operand 20308 states and 27070 transitions.
[2020-10-12 11:51:04,775 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 1702
[2020-10-12 11:51:04,775 INFO  L414         BasicCegarLoop]: Found error trace
[2020-10-12 11:51:04,777 INFO  L422         BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:51:04,778 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2020-10-12 11:51:04,785 INFO  L427      AbstractCegarLoop]: === Iteration 4 === [calculate_output8Err0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-10-12 11:51:04,785 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-10-12 11:51:04,786 INFO  L82        PathProgramCache]: Analyzing trace with hash 1801918854, now seen corresponding path program 1 times
[2020-10-12 11:51:04,787 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-10-12 11:51:04,787 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [762405407]
[2020-10-12 11:51:04,788 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-10-12 11:51:04,931 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-12 11:51:04,976 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-12 11:51:05,386 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-12 11:51:09,047 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-12 11:51:10,068 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-10-12 11:51:10,069 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 1727
[2020-10-12 11:51:10,069 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 3
[2020-10-12 11:51:10,069 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 5133
[2020-10-12 11:51:10,069 FATAL L256   erpolLogProxyWrapper]: Heuristic: BIGGEST
[2020-10-12 11:51:10,070 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 8
[2020-10-12 11:51:10,070 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 5
[2020-10-12 11:51:10,070 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 51
[2020-10-12 11:51:10,070 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-10-12 11:51:11,033 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-10-12 11:51:11,036 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-12 11:51:11,039 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-12 11:51:11,046 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-10-12 11:51:11,047 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 8
[2020-10-12 11:51:11,047 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-10-12 11:51:11,047 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 9
[2020-10-12 11:51:11,048 FATAL L256   erpolLogProxyWrapper]: Heuristic: BIGGEST
[2020-10-12 11:51:11,048 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 2
[2020-10-12 11:51:11,048 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 1
[2020-10-12 11:51:11,049 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 2
[2020-10-12 11:51:11,049 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-10-12 11:51:11,080 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8
[2020-10-12 11:51:11,087 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-12 11:51:11,092 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-12 11:51:11,112 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-12 11:51:11,148 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-10-12 11:51:11,148 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 23
[2020-10-12 11:51:11,149 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 2
[2020-10-12 11:51:11,149 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 60
[2020-10-12 11:51:11,150 FATAL L256   erpolLogProxyWrapper]: Heuristic: BIGGEST
[2020-10-12 11:51:11,150 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 4
[2020-10-12 11:51:11,150 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 0
[2020-10-12 11:51:11,150 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 23
[2020-10-12 11:51:11,151 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-10-12 11:51:11,171 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30
[2020-10-12 11:51:11,178 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-12 11:51:11,183 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-12 11:51:11,229 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-10-12 11:51:11,230 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 22
[2020-10-12 11:51:11,230 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-10-12 11:51:11,232 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 50
[2020-10-12 11:51:11,233 FATAL L256   erpolLogProxyWrapper]: Heuristic: BIGGEST
[2020-10-12 11:51:11,233 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 4
[2020-10-12 11:51:11,234 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 0
[2020-10-12 11:51:11,234 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 22
[2020-10-12 11:51:11,234 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-10-12 11:51:13,727 INFO  L134       CoverageAnalysis]: Checked inductivity of 58 backedges. 38 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked.
[2020-10-12 11:51:13,727 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [762405407]
[2020-10-12 11:51:13,728 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-10-12 11:51:13,728 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7
[2020-10-12 11:51:13,728 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701101485]
[2020-10-12 11:51:13,730 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 8 states
[2020-10-12 11:51:13,730 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-10-12 11:51:13,731 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2020-10-12 11:51:13,731 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56
[2020-10-12 11:51:13,731 INFO  L87              Difference]: Start difference. First operand 20308 states and 27070 transitions. Second operand 8 states.
[2020-10-12 11:51:38,847 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-10-12 11:51:38,847 INFO  L93              Difference]: Finished difference Result 58894 states and 82033 transitions.
[2020-10-12 11:51:38,848 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. 
[2020-10-12 11:51:38,848 INFO  L78                 Accepts]: Start accepts. Automaton has 8 states. Word has length 1701
[2020-10-12 11:51:38,849 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-10-12 11:51:39,006 INFO  L225             Difference]: With dead ends: 58894
[2020-10-12 11:51:39,006 INFO  L226             Difference]: Without dead ends: 38592
[2020-10-12 11:51:39,059 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156
[2020-10-12 11:51:39,112 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 38592 states.
[2020-10-12 11:51:39,844 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 38592 to 38522.
[2020-10-12 11:51:39,844 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 38522 states.
[2020-10-12 11:51:39,947 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 38522 states to 38522 states and 51691 transitions.
[2020-10-12 11:51:39,948 INFO  L78                 Accepts]: Start accepts. Automaton has 38522 states and 51691 transitions. Word has length 1701
[2020-10-12 11:51:39,948 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-10-12 11:51:39,949 INFO  L479      AbstractCegarLoop]: Abstraction has 38522 states and 51691 transitions.
[2020-10-12 11:51:39,949 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 8 states.
[2020-10-12 11:51:39,949 INFO  L276                IsEmpty]: Start isEmpty. Operand 38522 states and 51691 transitions.
[2020-10-12 11:51:40,062 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 1707
[2020-10-12 11:51:40,062 INFO  L414         BasicCegarLoop]: Found error trace
[2020-10-12 11:51:40,064 INFO  L422         BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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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]
[2020-10-12 11:51:40,064 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3
[2020-10-12 11:51:40,065 INFO  L427      AbstractCegarLoop]: === Iteration 5 === [calculate_output8Err0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-10-12 11:51:40,065 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-10-12 11:51:40,066 INFO  L82        PathProgramCache]: Analyzing trace with hash -568800467, now seen corresponding path program 1 times
[2020-10-12 11:51:40,066 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-10-12 11:51:40,066 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [140345291]
[2020-10-12 11:51:40,067 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-10-12 11:51:40,200 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-12 11:51:40,247 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-12 11:51:40,328 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-12 11:51:40,678 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-12 11:51:45,226 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-10-12 11:51:45,227 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 1732
[2020-10-12 11:51:45,227 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 3
[2020-10-12 11:51:45,227 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 5022
[2020-10-12 11:51:45,227 FATAL L256   erpolLogProxyWrapper]: Heuristic: BIGGEST
[2020-10-12 11:51:45,228 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 33
[2020-10-12 11:51:45,228 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 58
[2020-10-12 11:51:45,228 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 1279
[2020-10-12 11:51:45,228 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-10-12 11:51:52,355 WARN  L193               SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 40
[2020-10-12 11:51:52,576 WARN  L193               SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 41
[2020-10-12 11:51:52,809 WARN  L193               SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 39
[2020-10-12 11:51:52,958 WARN  L193               SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 38
[2020-10-12 11:51:53,111 WARN  L193               SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43
[2020-10-12 11:51:53,248 WARN  L193               SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43
[2020-10-12 11:51:53,407 WARN  L193               SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43
[2020-10-12 11:51:53,546 WARN  L193               SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43
[2020-10-12 11:51:53,684 WARN  L193               SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43
[2020-10-12 11:51:53,826 WARN  L193               SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43
[2020-10-12 11:51:53,991 WARN  L193               SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 41
[2020-10-12 11:51:54,166 WARN  L193               SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 42
[2020-10-12 11:51:54,387 WARN  L193               SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 42
[2020-10-12 11:51:54,635 WARN  L193               SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 43
[2020-10-12 11:51:54,943 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-10-12 11:51:54,946 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-12 11:51:54,947 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-12 11:51:54,949 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-10-12 11:51:54,949 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 8
[2020-10-12 11:51:54,949 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-10-12 11:51:54,950 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 2
[2020-10-12 11:51:54,950 FATAL L256   erpolLogProxyWrapper]: Heuristic: BIGGEST
[2020-10-12 11:51:54,950 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-10-12 11:51:54,950 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 1
[2020-10-12 11:51:54,950 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-10-12 11:51:54,951 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-10-12 11:51:54,996 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8
[2020-10-12 11:51:54,997 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-12 11:51:54,998 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-12 11:51:55,005 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-10-12 11:51:55,006 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 23
[2020-10-12 11:51:55,006 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-10-12 11:51:55,006 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 7
[2020-10-12 11:51:55,006 FATAL L256   erpolLogProxyWrapper]: Heuristic: BIGGEST
[2020-10-12 11:51:55,007 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-10-12 11:51:55,007 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 1
[2020-10-12 11:51:55,007 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-10-12 11:51:55,007 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-10-12 11:51:55,013 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30
[2020-10-12 11:51:55,019 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-12 11:51:55,024 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-12 11:51:55,056 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-10-12 11:51:55,056 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 27
[2020-10-12 11:51:55,056 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-10-12 11:51:55,057 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 36
[2020-10-12 11:51:55,057 FATAL L256   erpolLogProxyWrapper]: Heuristic: BIGGEST
[2020-10-12 11:51:55,057 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 3
[2020-10-12 11:51:55,057 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 1
[2020-10-12 11:51:55,057 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 20
[2020-10-12 11:51:55,058 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-10-12 11:52:19,043 INFO  L134       CoverageAnalysis]: Checked inductivity of 62 backedges. 41 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked.
[2020-10-12 11:52:19,043 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [140345291]
[2020-10-12 11:52:19,044 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-10-12 11:52:19,044 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24
[2020-10-12 11:52:19,044 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330569300]
[2020-10-12 11:52:19,045 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 24 states
[2020-10-12 11:52:19,045 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-10-12 11:52:19,046 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants.
[2020-10-12 11:52:19,046 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552
[2020-10-12 11:52:19,046 INFO  L87              Difference]: Start difference. First operand 38522 states and 51691 transitions. Second operand 24 states.
[2020-10-12 11:52:20,454 WARN  L193               SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 82
[2020-10-12 11:52:27,976 WARN  L193               SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 80
[2020-10-12 11:52:29,691 WARN  L193               SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 80
[2020-10-12 11:52:32,742 WARN  L193               SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 77
[2020-10-12 11:52:32,978 WARN  L193               SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 89
[2020-10-12 11:52:47,175 WARN  L193               SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 77
[2020-10-12 11:52:47,429 WARN  L193               SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 89