/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/eca-rers2012/Problem06_label03.c


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


This is Ultimate 0.2.0-0f64333
[2020-10-26 21:27:47,978 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2020-10-26 21:27:47,981 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2020-10-26 21:27:48,025 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2020-10-26 21:27:48,026 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2020-10-26 21:27:48,034 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2020-10-26 21:27:48,038 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2020-10-26 21:27:48,043 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2020-10-26 21:27:48,048 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2020-10-26 21:27:48,054 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
[2020-10-26 21:27:48,056 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
[2020-10-26 21:27:48,057 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2020-10-26 21:27:48,058 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2020-10-26 21:27:48,061 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2020-10-26 21:27:48,065 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2020-10-26 21:27:48,068 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2020-10-26 21:27:48,070 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2020-10-26 21:27:48,074 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2020-10-26 21:27:48,083 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2020-10-26 21:27:48,092 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2020-10-26 21:27:48,094 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2020-10-26 21:27:48,096 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2020-10-26 21:27:48,098 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2020-10-26 21:27:48,101 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2020-10-26 21:27:48,111 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2020-10-26 21:27:48,122 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2020-10-26 21:27:48,123 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2020-10-26 21:27:48,126 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2020-10-26 21:27:48,126 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2020-10-26 21:27:48,128 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2020-10-26 21:27:48,128 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2020-10-26 21:27:48,130 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2020-10-26 21:27:48,132 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2020-10-26 21:27:48,134 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2020-10-26 21:27:48,135 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2020-10-26 21:27:48,136 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
[2020-10-26 21:27:48,137 INFO  L184        SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2020-10-26 21:27:48,137 INFO  L184        SettingsManager]: ReqParser provides no preferences, ignoring...
[2020-10-26 21:27:48,138 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
[2020-10-26 21:27:48,139 INFO  L181        SettingsManager]: Resetting Witness Parser preferences to default values
[2020-10-26 21:27:48,140 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2020-10-26 21:27:48,148 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
[2020-10-26 21:27:48,204 INFO  L113        SettingsManager]: Loading preferences was successful
[2020-10-26 21:27:48,204 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2020-10-26 21:27:48,210 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2020-10-26 21:27:48,210 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2020-10-26 21:27:48,210 INFO  L138        SettingsManager]:  * Use SBE=true
[2020-10-26 21:27:48,211 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2020-10-26 21:27:48,211 INFO  L138        SettingsManager]:  * sizeof long=4
[2020-10-26 21:27:48,211 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2020-10-26 21:27:48,211 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2020-10-26 21:27:48,211 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2020-10-26 21:27:48,212 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2020-10-26 21:27:48,213 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2020-10-26 21:27:48,213 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2020-10-26 21:27:48,213 INFO  L138        SettingsManager]:  * sizeof long double=12
[2020-10-26 21:27:48,213 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2020-10-26 21:27:48,214 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2020-10-26 21:27:48,214 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2020-10-26 21:27:48,214 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2020-10-26 21:27:48,214 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2020-10-26 21:27:48,214 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2020-10-26 21:27:48,214 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2020-10-26 21:27:48,215 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-10-26 21:27:48,215 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2020-10-26 21:27:48,215 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2020-10-26 21:27:48,215 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2020-10-26 21:27:48,215 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2020-10-26 21:27:48,216 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-10-26 21:27:48,216 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2020-10-26 21:27:48,216 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2020-10-26 21:27:48,216 INFO  L138        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
WARNING: An illegal reflective access operation has occurred
WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int)
WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true;
[2020-10-26 21:27:48,685 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2020-10-26 21:27:48,716 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2020-10-26 21:27:48,720 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2020-10-26 21:27:48,721 INFO  L271        PluginConnector]: Initializing CDTParser...
[2020-10-26 21:27:48,722 INFO  L275        PluginConnector]: CDTParser initialized
[2020-10-26 21:27:48,723 INFO  L432   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem06_label03.c
[2020-10-26 21:27:48,811 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f5ae01066/dc6301df4d0942a1a43a9903c442b21b/FLAGb59ed0ce2
[2020-10-26 21:27:50,144 INFO  L306              CDTParser]: Found 1 translation units.
[2020-10-26 21:27:50,145 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem06_label03.c
[2020-10-26 21:27:50,217 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f5ae01066/dc6301df4d0942a1a43a9903c442b21b/FLAGb59ed0ce2
[2020-10-26 21:27:50,385 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f5ae01066/dc6301df4d0942a1a43a9903c442b21b
[2020-10-26 21:27:50,389 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2020-10-26 21:27:50,397 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2020-10-26 21:27:50,402 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2020-10-26 21:27:50,402 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2020-10-26 21:27:50,406 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2020-10-26 21:27:50,407 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 09:27:50" (1/1) ...
[2020-10-26 21:27:50,412 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@383ca202 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:27:50, skipping insertion in model container
[2020-10-26 21:27:50,412 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 09:27:50" (1/1) ...
[2020-10-26 21:27:50,421 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2020-10-26 21:27:50,662 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2020-10-26 21:27:52,737 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-10-26 21:27:52,756 INFO  L203         MainTranslator]: Completed pre-run
[2020-10-26 21:27:54,054 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-10-26 21:27:54,120 INFO  L208         MainTranslator]: Completed translation
[2020-10-26 21:27:54,122 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:27:54 WrapperNode
[2020-10-26 21:27:54,122 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2020-10-26 21:27:54,123 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2020-10-26 21:27:54,123 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2020-10-26 21:27:54,124 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2020-10-26 21:27:54,138 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:27:54" (1/1) ...
[2020-10-26 21:27:54,140 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:27:54" (1/1) ...
[2020-10-26 21:27:54,238 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:27:54" (1/1) ...
[2020-10-26 21:27:54,238 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:27:54" (1/1) ...
[2020-10-26 21:27:54,420 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:27:54" (1/1) ...
[2020-10-26 21:27:54,540 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:27:54" (1/1) ...
[2020-10-26 21:27:54,594 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:27:54" (1/1) ...
[2020-10-26 21:27:54,651 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2020-10-26 21:27:54,652 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2020-10-26 21:27:54,652 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2020-10-26 21:27:54,652 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2020-10-26 21:27:54,653 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:27:54" (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
[2020-10-26 21:27:54,738 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2020-10-26 21:27:54,739 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2020-10-26 21:27:54,739 INFO  L138     BoogieDeclarations]: Found implementation of procedure reach_error
[2020-10-26 21:27:54,739 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output
[2020-10-26 21:27:54,739 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output2
[2020-10-26 21:27:54,739 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output3
[2020-10-26 21:27:54,740 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output4
[2020-10-26 21:27:54,740 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output5
[2020-10-26 21:27:54,740 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2020-10-26 21:27:54,740 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output
[2020-10-26 21:27:54,740 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output2
[2020-10-26 21:27:54,740 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output3
[2020-10-26 21:27:54,741 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output4
[2020-10-26 21:27:54,741 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output5
[2020-10-26 21:27:54,741 INFO  L130     BoogieDeclarations]: Found specification of procedure abort
[2020-10-26 21:27:54,741 INFO  L130     BoogieDeclarations]: Found specification of procedure __assert_fail
[2020-10-26 21:27:54,741 INFO  L130     BoogieDeclarations]: Found specification of procedure reach_error
[2020-10-26 21:27:54,742 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack
[2020-10-26 21:27:54,742 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int
[2020-10-26 21:27:54,742 INFO  L130     BoogieDeclarations]: Found specification of procedure exit
[2020-10-26 21:27:54,742 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2020-10-26 21:27:54,742 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2020-10-26 21:27:54,742 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~int
[2020-10-26 21:27:54,743 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2020-10-26 21:27:54,743 INFO  L130     BoogieDeclarations]: Found specification of procedure write~int
[2020-10-26 21:27:54,743 INFO  L130     BoogieDeclarations]: Found specification of procedure read~int
[2020-10-26 21:27:54,743 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc
[2020-10-26 21:28:03,059 INFO  L293             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2020-10-26 21:28:03,060 INFO  L298             CfgBuilder]: Removed 1 assume(true) statements.
[2020-10-26 21:28:03,064 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 09:28:03 BoogieIcfgContainer
[2020-10-26 21:28:03,064 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2020-10-26 21:28:03,066 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2020-10-26 21:28:03,067 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2020-10-26 21:28:03,070 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2020-10-26 21:28:03,070 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 09:27:50" (1/3) ...
[2020-10-26 21:28:03,071 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f3b84d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 09:28:03, skipping insertion in model container
[2020-10-26 21:28:03,072 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:27:54" (2/3) ...
[2020-10-26 21:28:03,072 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f3b84d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 09:28:03, skipping insertion in model container
[2020-10-26 21:28:03,072 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 09:28:03" (3/3) ...
[2020-10-26 21:28:03,074 INFO  L111   eAbstractionObserver]: Analyzing ICFG Problem06_label03.c
[2020-10-26 21:28:03,086 INFO  L164   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION
[2020-10-26 21:28:03,092 INFO  L176   ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2020-10-26 21:28:03,105 INFO  L253      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2020-10-26 21:28:03,142 INFO  L377      AbstractCegarLoop]: Interprodecural is true
[2020-10-26 21:28:03,142 INFO  L378      AbstractCegarLoop]: Hoare is true
[2020-10-26 21:28:03,142 INFO  L379      AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation
[2020-10-26 21:28:03,142 INFO  L380      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2020-10-26 21:28:03,142 INFO  L381      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2020-10-26 21:28:03,142 INFO  L382      AbstractCegarLoop]: Difference is false
[2020-10-26 21:28:03,142 INFO  L383      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2020-10-26 21:28:03,143 INFO  L387      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2020-10-26 21:28:03,190 INFO  L276                IsEmpty]: Start isEmpty. Operand 1319 states.
[2020-10-26 21:28:03,356 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 982
[2020-10-26 21:28:03,356 INFO  L414         BasicCegarLoop]: Found error trace
[2020-10-26 21:28:03,358 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-10-26 21:28:03,359 INFO  L429      AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-10-26 21:28:03,369 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-10-26 21:28:03,370 INFO  L82        PathProgramCache]: Analyzing trace with hash 1661234620, now seen corresponding path program 1 times
[2020-10-26 21:28:03,379 INFO  L162   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-10-26 21:28:03,380 INFO  L353   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [116045676]
[2020-10-26 21:28:03,381 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-10-26 21:28:04,474 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-26 21:28:05,078 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-26 21:28:07,638 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-26 21:28:09,603 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-10-26 21:28:09,604 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 999
[2020-10-26 21:28:09,604 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 2
[2020-10-26 21:28:09,604 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 5119
[2020-10-26 21:28:09,607 FATAL L256   erpolLogProxyWrapper]: Heuristic: SHALLOWEST
[2020-10-26 21:28:09,608 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 26
[2020-10-26 21:28:09,608 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 5
[2020-10-26 21:28:09,608 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 769
[2020-10-26 21:28:09,609 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 4
[2020-10-26 21:28:14,284 WARN  L193               SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 65
[2020-10-26 21:28:14,484 WARN  L193               SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 65
[2020-10-26 21:28:14,699 WARN  L193               SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 65
[2020-10-26 21:28:14,950 WARN  L193               SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 71
[2020-10-26 21:28:15,216 WARN  L193               SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 69
[2020-10-26 21:28:15,454 WARN  L193               SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 69
[2020-10-26 21:28:15,822 WARN  L193               SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 76
[2020-10-26 21:28:16,108 WARN  L193               SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 64
[2020-10-26 21:28:16,284 WARN  L193               SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 58
[2020-10-26 21:28:16,475 WARN  L193               SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 58
[2020-10-26 21:28:17,051 WARN  L193               SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 157
[2020-10-26 21:28:17,056 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-10-26 21:28:17,070 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-26 21:28:17,076 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-26 21:28:17,100 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-10-26 21:28:17,101 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 8
[2020-10-26 21:28:17,101 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-10-26 21:28:17,101 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 29
[2020-10-26 21:28:17,101 FATAL L256   erpolLogProxyWrapper]: Heuristic: SHALLOWEST
[2020-10-26 21:28:17,102 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 2
[2020-10-26 21:28:17,102 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 1
[2020-10-26 21:28:17,102 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 2
[2020-10-26 21:28:17,102 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-10-26 21:28:30,862 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-10-26 21:28:30,863 INFO  L353   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [116045676]
[2020-10-26 21:28:30,865 INFO  L219   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-10-26 21:28:30,866 INFO  L232   FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17
[2020-10-26 21:28:30,866 INFO  L155   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563523051]
[2020-10-26 21:28:30,875 INFO  L461      AbstractCegarLoop]: Interpolant automaton has 18 states
[2020-10-26 21:28:30,875 INFO  L142   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-10-26 21:28:30,896 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants.
[2020-10-26 21:28:30,897 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=271, Unknown=0, NotChecked=0, Total=306
[2020-10-26 21:28:30,899 INFO  L87              Difference]: Start difference. First operand 1319 states. Second operand 18 states.
[2020-10-26 21:28:31,359 WARN  L193               SmtUtils]: Spent 303.00 ms on a formula simplification that was a NOOP. DAG size: 184
[2020-10-26 21:28:32,160 WARN  L193               SmtUtils]: Spent 691.00 ms on a formula simplification. DAG size of input: 199 DAG size of output: 189
[2020-10-26 21:28:32,915 WARN  L193               SmtUtils]: Spent 647.00 ms on a formula simplification. DAG size of input: 199 DAG size of output: 189
[2020-10-26 21:28:33,670 WARN  L193               SmtUtils]: Spent 665.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 193
[2020-10-26 21:28:37,663 WARN  L193               SmtUtils]: Spent 708.00 ms on a formula simplification. DAG size of input: 234 DAG size of output: 194
[2020-10-26 21:28:40,849 WARN  L193               SmtUtils]: Spent 735.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 193
[2020-10-26 21:28:43,443 WARN  L193               SmtUtils]: Spent 676.00 ms on a formula simplification. DAG size of input: 216 DAG size of output: 190
[2020-10-26 21:28:44,310 WARN  L193               SmtUtils]: Spent 761.00 ms on a formula simplification. DAG size of input: 235 DAG size of output: 194
[2020-10-26 21:28:45,424 WARN  L193               SmtUtils]: Spent 701.00 ms on a formula simplification. DAG size of input: 228 DAG size of output: 194
[2020-10-26 21:28:55,840 WARN  L193               SmtUtils]: Spent 726.00 ms on a formula simplification. DAG size of input: 207 DAG size of output: 192
[2020-10-26 21:28:56,650 WARN  L193               SmtUtils]: Spent 716.00 ms on a formula simplification. DAG size of input: 216 DAG size of output: 198
[2020-10-26 21:28:59,837 WARN  L193               SmtUtils]: Spent 745.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 196
[2020-10-26 21:29:07,434 WARN  L193               SmtUtils]: Spent 648.00 ms on a formula simplification. DAG size of input: 202 DAG size of output: 189
[2020-10-26 21:29:08,220 WARN  L193               SmtUtils]: Spent 670.00 ms on a formula simplification. DAG size of input: 207 DAG size of output: 193
[2020-10-26 21:29:10,721 WARN  L193               SmtUtils]: Spent 700.00 ms on a formula simplification. DAG size of input: 207 DAG size of output: 191
[2020-10-26 21:29:23,920 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-10-26 21:29:23,923 INFO  L93              Difference]: Finished difference Result 3401 states and 6365 transitions.
[2020-10-26 21:29:23,925 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. 
[2020-10-26 21:29:23,927 INFO  L78                 Accepts]: Start accepts. Automaton has 18 states. Word has length 981
[2020-10-26 21:29:23,934 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-10-26 21:29:23,985 INFO  L225             Difference]: With dead ends: 3401
[2020-10-26 21:29:23,986 INFO  L226             Difference]: Without dead ends: 2020
[2020-10-26 21:29:23,999 INFO  L677         BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 13.8s TimeCoverageRelationStatistics Valid=153, Invalid=903, Unknown=0, NotChecked=0, Total=1056
[2020-10-26 21:29:24,021 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 2020 states.
[2020-10-26 21:29:24,164 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 2020 to 2020.
[2020-10-26 21:29:24,166 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 2020 states.
[2020-10-26 21:29:24,178 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 2020 states to 2020 states and 3054 transitions.
[2020-10-26 21:29:24,180 INFO  L78                 Accepts]: Start accepts. Automaton has 2020 states and 3054 transitions. Word has length 981
[2020-10-26 21:29:24,183 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-10-26 21:29:24,184 INFO  L481      AbstractCegarLoop]: Abstraction has 2020 states and 3054 transitions.
[2020-10-26 21:29:24,184 INFO  L482      AbstractCegarLoop]: Interpolant automaton has 18 states.
[2020-10-26 21:29:24,184 INFO  L276                IsEmpty]: Start isEmpty. Operand 2020 states and 3054 transitions.
[2020-10-26 21:29:24,226 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 1052
[2020-10-26 21:29:24,227 INFO  L414         BasicCegarLoop]: Found error trace
[2020-10-26 21:29:24,228 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-10-26 21:29:24,228 WARN  L518      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2020-10-26 21:29:24,229 INFO  L429      AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-10-26 21:29:24,229 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-10-26 21:29:24,230 INFO  L82        PathProgramCache]: Analyzing trace with hash 435601811, now seen corresponding path program 1 times
[2020-10-26 21:29:24,230 INFO  L162   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-10-26 21:29:24,231 INFO  L353   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [157316201]
[2020-10-26 21:29:24,231 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-10-26 21:29:24,406 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-26 21:29:24,469 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-26 21:29:27,086 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-26 21:29:29,630 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-10-26 21:29:29,631 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 1071
[2020-10-26 21:29:29,631 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 2
[2020-10-26 21:29:29,631 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 5221
[2020-10-26 21:29:29,631 FATAL L256   erpolLogProxyWrapper]: Heuristic: SHALLOWEST
[2020-10-26 21:29:29,632 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 6
[2020-10-26 21:29:29,632 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 5
[2020-10-26 21:29:29,632 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 76
[2020-10-26 21:29:29,632 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-10-26 21:29:30,115 WARN  L193               SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 157
[2020-10-26 21:29:30,116 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-10-26 21:29:30,130 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-26 21:29:30,135 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-26 21:29:30,161 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-10-26 21:29:30,161 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 8
[2020-10-26 21:29:30,162 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-10-26 21:29:30,162 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 30
[2020-10-26 21:29:30,162 FATAL L256   erpolLogProxyWrapper]: Heuristic: SHALLOWEST
[2020-10-26 21:29:30,162 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 2
[2020-10-26 21:29:30,162 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 1
[2020-10-26 21:29:30,162 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 2
[2020-10-26 21:29:30,163 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-10-26 21:29:30,247 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8
[2020-10-26 21:29:30,278 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-26 21:29:30,298 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-26 21:29:30,484 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-10-26 21:29:30,485 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 71
[2020-10-26 21:29:30,485 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-10-26 21:29:30,485 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 205
[2020-10-26 21:29:30,486 FATAL L256   erpolLogProxyWrapper]: Heuristic: SHALLOWEST
[2020-10-26 21:29:30,486 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 4
[2020-10-26 21:29:30,486 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 0
[2020-10-26 21:29:30,486 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 71
[2020-10-26 21:29:30,486 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-10-26 21:29:31,426 INFO  L134       CoverageAnalysis]: Checked inductivity of 67 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-10-26 21:29:31,426 INFO  L353   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [157316201]
[2020-10-26 21:29:31,427 INFO  L219   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-10-26 21:29:31,427 INFO  L232   FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6
[2020-10-26 21:29:31,427 INFO  L155   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993785818]
[2020-10-26 21:29:31,437 INFO  L461      AbstractCegarLoop]: Interpolant automaton has 7 states
[2020-10-26 21:29:31,438 INFO  L142   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-10-26 21:29:31,444 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2020-10-26 21:29:31,444 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42
[2020-10-26 21:29:31,444 INFO  L87              Difference]: Start difference. First operand 2020 states and 3054 transitions. Second operand 7 states.
[2020-10-26 21:29:31,677 WARN  L193               SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 164
[2020-10-26 21:29:33,062 WARN  L193               SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 166
[2020-10-26 21:29:54,278 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-10-26 21:29:54,278 INFO  L93              Difference]: Finished difference Result 4495 states and 7533 transitions.
[2020-10-26 21:29:54,280 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2020-10-26 21:29:54,280 INFO  L78                 Accepts]: Start accepts. Automaton has 7 states. Word has length 1051
[2020-10-26 21:29:54,280 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-10-26 21:29:54,299 INFO  L225             Difference]: With dead ends: 4495
[2020-10-26 21:29:54,299 INFO  L226             Difference]: Without dead ends: 3235
[2020-10-26 21:29:54,304 INFO  L677         BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110
[2020-10-26 21:29:54,309 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 3235 states.
[2020-10-26 21:29:54,399 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 3235 to 3164.
[2020-10-26 21:29:54,399 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 3164 states.
[2020-10-26 21:29:54,411 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 3164 states to 3164 states and 4676 transitions.
[2020-10-26 21:29:54,411 INFO  L78                 Accepts]: Start accepts. Automaton has 3164 states and 4676 transitions. Word has length 1051
[2020-10-26 21:29:54,412 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-10-26 21:29:54,412 INFO  L481      AbstractCegarLoop]: Abstraction has 3164 states and 4676 transitions.
[2020-10-26 21:29:54,412 INFO  L482      AbstractCegarLoop]: Interpolant automaton has 7 states.
[2020-10-26 21:29:54,412 INFO  L276                IsEmpty]: Start isEmpty. Operand 3164 states and 4676 transitions.
[2020-10-26 21:29:54,430 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 1104
[2020-10-26 21:29:54,430 INFO  L414         BasicCegarLoop]: Found error trace
[2020-10-26 21:29:54,432 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-10-26 21:29:54,432 WARN  L518      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2020-10-26 21:29:54,432 INFO  L429      AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-10-26 21:29:54,433 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-10-26 21:29:54,433 INFO  L82        PathProgramCache]: Analyzing trace with hash 547021168, now seen corresponding path program 1 times
[2020-10-26 21:29:54,433 INFO  L162   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-10-26 21:29:54,434 INFO  L353   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [335147982]
[2020-10-26 21:29:54,434 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-10-26 21:29:54,854 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-26 21:29:55,289 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-26 21:29:55,867 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-26 21:29:59,980 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-10-26 21:29:59,980 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 1123
[2020-10-26 21:29:59,980 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 2
[2020-10-26 21:29:59,981 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 5121
[2020-10-26 21:29:59,981 FATAL L256   erpolLogProxyWrapper]: Heuristic: SHALLOWEST
[2020-10-26 21:29:59,981 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 21
[2020-10-26 21:29:59,981 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 5
[2020-10-26 21:29:59,981 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 552
[2020-10-26 21:29:59,981 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-10-26 21:30:01,720 WARN  L193               SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 50
[2020-10-26 21:30:01,928 WARN  L193               SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 65
[2020-10-26 21:30:02,237 WARN  L193               SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 77
[2020-10-26 21:30:02,413 WARN  L193               SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 69
[2020-10-26 21:30:02,573 WARN  L193               SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 65
[2020-10-26 21:30:03,239 WARN  L193               SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 157
[2020-10-26 21:30:03,242 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-10-26 21:30:03,249 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-26 21:30:03,254 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-26 21:30:03,278 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-10-26 21:30:03,278 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 8
[2020-10-26 21:30:03,278 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-10-26 21:30:03,278 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 28
[2020-10-26 21:30:03,278 FATAL L256   erpolLogProxyWrapper]: Heuristic: SHALLOWEST
[2020-10-26 21:30:03,279 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 2
[2020-10-26 21:30:03,279 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 1
[2020-10-26 21:30:03,279 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 2
[2020-10-26 21:30:03,279 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-10-26 21:30:03,424 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8
[2020-10-26 21:30:03,468 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-26 21:30:03,498 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-26 21:30:03,839 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-10-26 21:30:03,839 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 123
[2020-10-26 21:30:03,839 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-10-26 21:30:03,839 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 370
[2020-10-26 21:30:03,840 FATAL L256   erpolLogProxyWrapper]: Heuristic: SHALLOWEST
[2020-10-26 21:30:03,840 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 5
[2020-10-26 21:30:03,840 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 0
[2020-10-26 21:30:03,840 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 123
[2020-10-26 21:30:03,840 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-10-26 21:30:13,972 INFO  L134       CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-10-26 21:30:13,972 INFO  L353   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [335147982]
[2020-10-26 21:30:13,976 INFO  L219   FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-10-26 21:30:13,976 INFO  L232   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17
[2020-10-26 21:30:13,976 INFO  L155   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971704392]
[2020-10-26 21:30:13,978 INFO  L461      AbstractCegarLoop]: Interpolant automaton has 18 states
[2020-10-26 21:30:13,978 INFO  L142   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-10-26 21:30:13,979 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants.
[2020-10-26 21:30:13,979 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=268, Unknown=0, NotChecked=0, Total=306
[2020-10-26 21:30:13,979 INFO  L87              Difference]: Start difference. First operand 3164 states and 4676 transitions. Second operand 18 states.
[2020-10-26 21:30:14,363 WARN  L193               SmtUtils]: Spent 270.00 ms on a formula simplification that was a NOOP. DAG size: 178
[2020-10-26 21:30:16,650 WARN  L193               SmtUtils]: Spent 383.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 73
[2020-10-26 21:30:16,935 WARN  L193               SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 64
[2020-10-26 21:30:17,266 WARN  L193               SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 78
[2020-10-26 21:30:18,166 WARN  L193               SmtUtils]: Spent 829.00 ms on a formula simplification. DAG size of input: 217 DAG size of output: 203
[2020-10-26 21:30:19,122 WARN  L193               SmtUtils]: Spent 892.00 ms on a formula simplification. DAG size of input: 232 DAG size of output: 213
[2020-10-26 21:30:20,702 WARN  L193               SmtUtils]: Spent 958.00 ms on a formula simplification. DAG size of input: 250 DAG size of output: 211
[2020-10-26 21:30:24,447 WARN  L193               SmtUtils]: Spent 1.28 s on a formula simplification. DAG size of input: 254 DAG size of output: 210
[2020-10-26 21:30:26,944 WARN  L193               SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 52
[2020-10-26 21:30:29,625 WARN  L193               SmtUtils]: Spent 521.00 ms on a formula simplification. DAG size of input: 181 DAG size of output: 175
[2020-10-26 21:30:35,408 WARN  L193               SmtUtils]: Spent 724.00 ms on a formula simplification. DAG size of input: 216 DAG size of output: 194
[2020-10-26 21:30:36,309 WARN  L193               SmtUtils]: Spent 790.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 201
[2020-10-26 21:30:38,001 WARN  L193               SmtUtils]: Spent 778.00 ms on a formula simplification. DAG size of input: 223 DAG size of output: 199
[2020-10-26 21:30:50,212 WARN  L193               SmtUtils]: Spent 1.19 s on a formula simplification. DAG size of input: 224 DAG size of output: 198
[2020-10-26 21:30:51,618 WARN  L193               SmtUtils]: Spent 866.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 196
[2020-10-26 21:31:34,337 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-10-26 21:31:34,337 INFO  L93              Difference]: Finished difference Result 9174 states and 14954 transitions.
[2020-10-26 21:31:34,338 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. 
[2020-10-26 21:31:34,338 INFO  L78                 Accepts]: Start accepts. Automaton has 18 states. Word has length 1103
[2020-10-26 21:31:34,340 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-10-26 21:31:34,373 INFO  L225             Difference]: With dead ends: 9174
[2020-10-26 21:31:34,373 INFO  L226             Difference]: Without dead ends: 6770
[2020-10-26 21:31:34,382 INFO  L677         BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 12.6s TimeCoverageRelationStatistics Valid=232, Invalid=824, Unknown=0, NotChecked=0, Total=1056
[2020-10-26 21:31:34,391 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 6770 states.
[2020-10-26 21:31:34,569 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 6770 to 6755.
[2020-10-26 21:31:34,569 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 6755 states.
[2020-10-26 21:31:34,600 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6755 states to 6755 states and 8464 transitions.
[2020-10-26 21:31:34,601 INFO  L78                 Accepts]: Start accepts. Automaton has 6755 states and 8464 transitions. Word has length 1103
[2020-10-26 21:31:34,602 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-10-26 21:31:34,602 INFO  L481      AbstractCegarLoop]: Abstraction has 6755 states and 8464 transitions.
[2020-10-26 21:31:34,602 INFO  L482      AbstractCegarLoop]: Interpolant automaton has 18 states.
[2020-10-26 21:31:34,602 INFO  L276                IsEmpty]: Start isEmpty. Operand 6755 states and 8464 transitions.
[2020-10-26 21:31:34,638 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 1129
[2020-10-26 21:31:34,638 INFO  L414         BasicCegarLoop]: Found error trace
[2020-10-26 21:31:34,645 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-10-26 21:31:34,646 WARN  L518      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2020-10-26 21:31:34,646 INFO  L429      AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-10-26 21:31:34,647 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-10-26 21:31:34,647 INFO  L82        PathProgramCache]: Analyzing trace with hash 1759962254, now seen corresponding path program 1 times
[2020-10-26 21:31:34,648 INFO  L162   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-10-26 21:31:34,648 INFO  L353   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [900076620]
[2020-10-26 21:31:34,649 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-10-26 21:31:35,119 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-26 21:31:35,375 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-26 21:31:36,157 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-26 21:31:36,824 FATAL L256   erpolLogProxyWrapper]: Now shrinking...