/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/Problem05_label31.c


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


This is Ultimate 0.2.0-0f64333
[2020-10-26 21:17:33,742 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2020-10-26 21:17:33,747 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2020-10-26 21:17:33,804 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2020-10-26 21:17:33,805 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2020-10-26 21:17:33,811 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2020-10-26 21:17:33,814 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2020-10-26 21:17:33,818 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2020-10-26 21:17:33,822 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2020-10-26 21:17:33,830 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
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[2020-10-26 21:17:33,833 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2020-10-26 21:17:33,837 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2020-10-26 21:17:33,840 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2020-10-26 21:17:33,842 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2020-10-26 21:17:33,843 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2020-10-26 21:17:33,848 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2020-10-26 21:17:33,857 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2020-10-26 21:17:33,862 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2020-10-26 21:17:33,866 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2020-10-26 21:17:33,869 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2020-10-26 21:17:33,870 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2020-10-26 21:17:33,873 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2020-10-26 21:17:33,882 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2020-10-26 21:17:33,883 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2020-10-26 21:17:33,883 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2020-10-26 21:17:33,887 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2020-10-26 21:17:33,888 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2020-10-26 21:17:33,889 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2020-10-26 21:17:33,889 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
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[2020-10-26 21:17:33,892 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2020-10-26 21:17:33,893 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2020-10-26 21:17:33,894 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2020-10-26 21:17:33,901 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
[2020-10-26 21:17:33,902 INFO  L184        SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
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[2020-10-26 21:17:33,903 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
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[2020-10-26 21:17:33,905 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2020-10-26 21:17:33,913 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 21:17:33,964 INFO  L113        SettingsManager]: Loading preferences was successful
[2020-10-26 21:17:33,965 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2020-10-26 21:17:33,969 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2020-10-26 21:17:33,970 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2020-10-26 21:17:33,970 INFO  L138        SettingsManager]:  * Use SBE=true
[2020-10-26 21:17:33,970 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2020-10-26 21:17:33,970 INFO  L138        SettingsManager]:  * sizeof long=4
[2020-10-26 21:17:33,971 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2020-10-26 21:17:33,971 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2020-10-26 21:17:33,971 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2020-10-26 21:17:33,972 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2020-10-26 21:17:33,973 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2020-10-26 21:17:33,973 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2020-10-26 21:17:33,973 INFO  L138        SettingsManager]:  * sizeof long double=12
[2020-10-26 21:17:33,973 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2020-10-26 21:17:33,973 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2020-10-26 21:17:33,973 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2020-10-26 21:17:33,974 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2020-10-26 21:17:33,974 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2020-10-26 21:17:33,974 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2020-10-26 21:17:33,974 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2020-10-26 21:17:33,974 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-10-26 21:17:33,975 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2020-10-26 21:17:33,975 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2020-10-26 21:17:33,975 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2020-10-26 21:17:33,975 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2020-10-26 21:17:33,976 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-10-26 21:17:33,976 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2020-10-26 21:17:33,976 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2020-10-26 21:17:33,976 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$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true;
[2020-10-26 21:17:34,418 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2020-10-26 21:17:34,468 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2020-10-26 21:17:34,472 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2020-10-26 21:17:34,473 INFO  L271        PluginConnector]: Initializing CDTParser...
[2020-10-26 21:17:34,474 INFO  L275        PluginConnector]: CDTParser initialized
[2020-10-26 21:17:34,475 INFO  L432   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem05_label31.c
[2020-10-26 21:17:34,564 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/156e68e31/ff98a87ca1d5492ea5ba167063663af9/FLAGd8bd5b67e
[2020-10-26 21:17:36,086 INFO  L306              CDTParser]: Found 1 translation units.
[2020-10-26 21:17:36,086 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem05_label31.c
[2020-10-26 21:17:36,152 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/156e68e31/ff98a87ca1d5492ea5ba167063663af9/FLAGd8bd5b67e
[2020-10-26 21:17:36,550 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/156e68e31/ff98a87ca1d5492ea5ba167063663af9
[2020-10-26 21:17:36,554 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2020-10-26 21:17:36,563 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2020-10-26 21:17:36,567 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2020-10-26 21:17:36,567 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2020-10-26 21:17:36,572 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2020-10-26 21:17:36,573 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 09:17:36" (1/1) ...
[2020-10-26 21:17:36,578 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62a3bc89 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:17:36, skipping insertion in model container
[2020-10-26 21:17:36,578 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 09:17:36" (1/1) ...
[2020-10-26 21:17:36,588 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2020-10-26 21:17:36,847 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2020-10-26 21:17:39,105 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-10-26 21:17:39,123 INFO  L203         MainTranslator]: Completed pre-run
[2020-10-26 21:17:40,316 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-10-26 21:17:40,381 INFO  L208         MainTranslator]: Completed translation
[2020-10-26 21:17:40,382 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:17:40 WrapperNode
[2020-10-26 21:17:40,382 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2020-10-26 21:17:40,383 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2020-10-26 21:17:40,383 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2020-10-26 21:17:40,384 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2020-10-26 21:17:40,398 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:17:40" (1/1) ...
[2020-10-26 21:17:40,398 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:17:40" (1/1) ...
[2020-10-26 21:17:40,494 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:17:40" (1/1) ...
[2020-10-26 21:17:40,495 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:17:40" (1/1) ...
[2020-10-26 21:17:40,732 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:17:40" (1/1) ...
[2020-10-26 21:17:40,790 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:17:40" (1/1) ...
[2020-10-26 21:17:40,841 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:17:40" (1/1) ...
[2020-10-26 21:17:40,976 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2020-10-26 21:17:40,982 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2020-10-26 21:17:40,983 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2020-10-26 21:17:40,983 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2020-10-26 21:17:40,987 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:17:40" (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 21:17:41,078 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2020-10-26 21:17:41,079 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2020-10-26 21:17:41,079 INFO  L138     BoogieDeclarations]: Found implementation of procedure reach_error
[2020-10-26 21:17:41,079 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output
[2020-10-26 21:17:41,079 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output2
[2020-10-26 21:17:41,079 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output3
[2020-10-26 21:17:41,080 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output4
[2020-10-26 21:17:41,080 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output5
[2020-10-26 21:17:41,080 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output6
[2020-10-26 21:17:41,080 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output7
[2020-10-26 21:17:41,080 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output8
[2020-10-26 21:17:41,080 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2020-10-26 21:17:41,081 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output
[2020-10-26 21:17:41,081 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output2
[2020-10-26 21:17:41,081 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output3
[2020-10-26 21:17:41,081 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output4
[2020-10-26 21:17:41,081 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output5
[2020-10-26 21:17:41,081 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output6
[2020-10-26 21:17:41,081 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output7
[2020-10-26 21:17:41,082 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output8
[2020-10-26 21:17:41,082 INFO  L130     BoogieDeclarations]: Found specification of procedure abort
[2020-10-26 21:17:41,082 INFO  L130     BoogieDeclarations]: Found specification of procedure __assert_fail
[2020-10-26 21:17:41,082 INFO  L130     BoogieDeclarations]: Found specification of procedure reach_error
[2020-10-26 21:17:41,082 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack
[2020-10-26 21:17:41,082 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int
[2020-10-26 21:17:41,082 INFO  L130     BoogieDeclarations]: Found specification of procedure exit
[2020-10-26 21:17:41,083 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2020-10-26 21:17:41,083 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2020-10-26 21:17:41,083 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~int
[2020-10-26 21:17:41,083 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2020-10-26 21:17:41,083 INFO  L130     BoogieDeclarations]: Found specification of procedure write~int
[2020-10-26 21:17:41,083 INFO  L130     BoogieDeclarations]: Found specification of procedure read~int
[2020-10-26 21:17:41,083 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc
[2020-10-26 21:17:50,757 INFO  L293             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2020-10-26 21:17:50,757 INFO  L298             CfgBuilder]: Removed 1 assume(true) statements.
[2020-10-26 21:17:50,762 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 09:17:50 BoogieIcfgContainer
[2020-10-26 21:17:50,763 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2020-10-26 21:17:50,765 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2020-10-26 21:17:50,765 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2020-10-26 21:17:50,768 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2020-10-26 21:17:50,769 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 09:17:36" (1/3) ...
[2020-10-26 21:17:50,770 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ce3be8a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 09:17:50, skipping insertion in model container
[2020-10-26 21:17:50,770 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:17:40" (2/3) ...
[2020-10-26 21:17:50,770 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ce3be8a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 09:17:50, skipping insertion in model container
[2020-10-26 21:17:50,770 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 09:17:50" (3/3) ...
[2020-10-26 21:17:50,772 INFO  L111   eAbstractionObserver]: Analyzing ICFG Problem05_label31.c
[2020-10-26 21:17:50,784 INFO  L164   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION
[2020-10-26 21:17:50,790 INFO  L176   ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2020-10-26 21:17:50,802 INFO  L253      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2020-10-26 21:17:50,840 INFO  L377      AbstractCegarLoop]: Interprodecural is true
[2020-10-26 21:17:50,840 INFO  L378      AbstractCegarLoop]: Hoare is true
[2020-10-26 21:17:50,840 INFO  L379      AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation
[2020-10-26 21:17:50,840 INFO  L380      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2020-10-26 21:17:50,840 INFO  L381      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2020-10-26 21:17:50,840 INFO  L382      AbstractCegarLoop]: Difference is false
[2020-10-26 21:17:50,841 INFO  L383      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2020-10-26 21:17:50,841 INFO  L387      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2020-10-26 21:17:50,894 INFO  L276                IsEmpty]: Start isEmpty. Operand 2226 states.
[2020-10-26 21:17:51,038 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 1688
[2020-10-26 21:17:51,038 INFO  L414         BasicCegarLoop]: Found error trace
[2020-10-26 21:17:51,041 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]
[2020-10-26 21:17:51,041 INFO  L429      AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-10-26 21:17:51,055 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-10-26 21:17:51,057 INFO  L82        PathProgramCache]: Analyzing trace with hash -499540783, now seen corresponding path program 1 times
[2020-10-26 21:17:51,066 INFO  L162   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-10-26 21:17:51,067 INFO  L353   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1501200836]
[2020-10-26 21:17:51,068 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-10-26 21:17:51,977 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-26 21:17:52,490 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-26 21:17:57,110 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-10-26 21:17:57,110 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 1711
[2020-10-26 21:17:57,111 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-10-26 21:17:57,111 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 5123
[2020-10-26 21:17:57,113 FATAL L256   erpolLogProxyWrapper]: Heuristic: SHALLOWEST
[2020-10-26 21:17:57,113 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 20
[2020-10-26 21:17:57,113 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 5
[2020-10-26 21:17:57,113 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 1702
[2020-10-26 21:17:57,114 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 2
[2020-10-26 21:17:58,796 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-10-26 21:17:58,812 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-26 21:17:58,818 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-26 21:17:58,842 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-10-26 21:17:58,843 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 8
[2020-10-26 21:17:58,843 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-10-26 21:17:58,844 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 28
[2020-10-26 21:17:58,844 FATAL L256   erpolLogProxyWrapper]: Heuristic: SHALLOWEST
[2020-10-26 21:17:58,844 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 2
[2020-10-26 21:17:58,844 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 1
[2020-10-26 21:17:58,845 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 2
[2020-10-26 21:17:58,845 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-10-26 21:18:02,521 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 21:18:02,522 INFO  L353   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1501200836]
[2020-10-26 21:18:02,523 INFO  L219   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-10-26 21:18:02,524 INFO  L232   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-10-26 21:18:02,525 INFO  L155   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141766642]
[2020-10-26 21:18:02,535 INFO  L461      AbstractCegarLoop]: Interpolant automaton has 5 states
[2020-10-26 21:18:02,536 INFO  L142   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-10-26 21:18:02,550 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2020-10-26 21:18:02,551 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20
[2020-10-26 21:18:02,553 INFO  L87              Difference]: Start difference. First operand 2226 states. Second operand 5 states.
[2020-10-26 21:18:37,379 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-10-26 21:18:37,380 INFO  L93              Difference]: Finished difference Result 8269 states and 15670 transitions.
[2020-10-26 21:18:37,386 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2020-10-26 21:18:37,387 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 1687
[2020-10-26 21:18:37,395 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-10-26 21:18:37,463 INFO  L225             Difference]: With dead ends: 8269
[2020-10-26 21:18:37,464 INFO  L226             Difference]: Without dead ends: 5975
[2020-10-26 21:18:37,479 INFO  L677         BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42
[2020-10-26 21:18:37,508 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 5975 states.
[2020-10-26 21:18:37,764 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 5975 to 5839.
[2020-10-26 21:18:37,765 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 5839 states.
[2020-10-26 21:18:37,796 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5839 states to 5839 states and 10172 transitions.
[2020-10-26 21:18:37,799 INFO  L78                 Accepts]: Start accepts. Automaton has 5839 states and 10172 transitions. Word has length 1687
[2020-10-26 21:18:37,804 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-10-26 21:18:37,804 INFO  L481      AbstractCegarLoop]: Abstraction has 5839 states and 10172 transitions.
[2020-10-26 21:18:37,804 INFO  L482      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2020-10-26 21:18:37,804 INFO  L276                IsEmpty]: Start isEmpty. Operand 5839 states and 10172 transitions.
[2020-10-26 21:18:38,010 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 1700
[2020-10-26 21:18:38,011 INFO  L414         BasicCegarLoop]: Found error trace
[2020-10-26 21:18:38,012 INFO  L422         BasicCegarLoop]: trace histogram [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, 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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]
[2020-10-26 21:18:38,013 WARN  L518      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2020-10-26 21:18:38,013 INFO  L429      AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-10-26 21:18:38,014 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-10-26 21:18:38,016 INFO  L82        PathProgramCache]: Analyzing trace with hash -488349227, now seen corresponding path program 1 times
[2020-10-26 21:18:38,016 INFO  L162   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-10-26 21:18:38,016 INFO  L353   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [940899461]
[2020-10-26 21:18:38,017 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-10-26 21:18:38,180 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-26 21:18:38,210 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-26 21:18:38,593 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-26 21:18:43,307 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-10-26 21:18:43,307 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 1725
[2020-10-26 21:18:43,307 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 2
[2020-10-26 21:18:43,308 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 5123
[2020-10-26 21:18:43,309 FATAL L256   erpolLogProxyWrapper]: Heuristic: SHALLOWEST
[2020-10-26 21:18:43,309 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 6
[2020-10-26 21:18:43,309 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 5
[2020-10-26 21:18:43,309 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 18
[2020-10-26 21:18:43,309 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-10-26 21:18:44,488 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-10-26 21:18:44,499 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-26 21:18:44,504 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-26 21:18:44,536 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-10-26 21:18:44,536 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 8
[2020-10-26 21:18:44,536 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-10-26 21:18:44,537 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 36
[2020-10-26 21:18:44,537 FATAL L256   erpolLogProxyWrapper]: Heuristic: SHALLOWEST
[2020-10-26 21:18:44,537 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 2
[2020-10-26 21:18:44,537 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 1
[2020-10-26 21:18:44,537 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 2
[2020-10-26 21:18:44,538 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-10-26 21:18:44,575 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8
[2020-10-26 21:18:44,583 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-26 21:18:44,586 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-26 21:18:44,610 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-10-26 21:18:44,611 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 13
[2020-10-26 21:18:44,611 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-10-26 21:18:44,611 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 27
[2020-10-26 21:18:44,611 FATAL L256   erpolLogProxyWrapper]: Heuristic: SHALLOWEST
[2020-10-26 21:18:44,612 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 4
[2020-10-26 21:18:44,612 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 0
[2020-10-26 21:18:44,612 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 13
[2020-10-26 21:18:44,613 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-10-26 21:18:45,828 INFO  L134       CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-10-26 21:18:45,828 INFO  L353   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [940899461]
[2020-10-26 21:18:45,829 INFO  L219   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-10-26 21:18:45,829 INFO  L232   FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6
[2020-10-26 21:18:45,829 INFO  L155   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144939497]
[2020-10-26 21:18:45,833 INFO  L461      AbstractCegarLoop]: Interpolant automaton has 7 states
[2020-10-26 21:18:45,833 INFO  L142   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-10-26 21:18:45,834 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2020-10-26 21:18:45,834 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42
[2020-10-26 21:18:45,834 INFO  L87              Difference]: Start difference. First operand 5839 states and 10172 transitions. Second operand 7 states.
[2020-10-26 21:19:15,158 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-10-26 21:19:15,158 INFO  L93              Difference]: Finished difference Result 17203 states and 30460 transitions.
[2020-10-26 21:19:15,167 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. 
[2020-10-26 21:19:15,167 INFO  L78                 Accepts]: Start accepts. Automaton has 7 states. Word has length 1699
[2020-10-26 21:19:15,167 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-10-26 21:19:15,230 INFO  L225             Difference]: With dead ends: 17203
[2020-10-26 21:19:15,230 INFO  L226             Difference]: Without dead ends: 11370
[2020-10-26 21:19:15,249 INFO  L677         BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110
[2020-10-26 21:19:15,264 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 11370 states.
[2020-10-26 21:19:15,585 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 11370 to 11269.
[2020-10-26 21:19:15,585 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 11269 states.
[2020-10-26 21:19:15,623 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 11269 states to 11269 states and 17389 transitions.
[2020-10-26 21:19:15,623 INFO  L78                 Accepts]: Start accepts. Automaton has 11269 states and 17389 transitions. Word has length 1699
[2020-10-26 21:19:15,624 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-10-26 21:19:15,624 INFO  L481      AbstractCegarLoop]: Abstraction has 11269 states and 17389 transitions.
[2020-10-26 21:19:15,624 INFO  L482      AbstractCegarLoop]: Interpolant automaton has 7 states.
[2020-10-26 21:19:15,624 INFO  L276                IsEmpty]: Start isEmpty. Operand 11269 states and 17389 transitions.
[2020-10-26 21:19:15,772 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 1711
[2020-10-26 21:19:15,773 INFO  L414         BasicCegarLoop]: Found error trace
[2020-10-26 21:19:15,774 INFO  L422         BasicCegarLoop]: trace histogram [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, 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]
[2020-10-26 21:19:15,775 WARN  L518      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2020-10-26 21:19:15,775 INFO  L429      AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-10-26 21:19:15,776 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-10-26 21:19:15,777 INFO  L82        PathProgramCache]: Analyzing trace with hash 635791837, now seen corresponding path program 1 times
[2020-10-26 21:19:15,777 INFO  L162   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-10-26 21:19:15,777 INFO  L353   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [200215276]
[2020-10-26 21:19:15,778 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-10-26 21:19:15,937 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-26 21:19:15,970 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-26 21:19:16,231 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-26 21:19:16,718 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-26 21:19:21,071 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-10-26 21:19:21,072 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 1738
[2020-10-26 21:19:21,072 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 3
[2020-10-26 21:19:21,075 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 5130
[2020-10-26 21:19:21,075 FATAL L256   erpolLogProxyWrapper]: Heuristic: SHALLOWEST
[2020-10-26 21:19:21,075 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 6
[2020-10-26 21:19:21,075 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 5
[2020-10-26 21:19:21,075 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 17
[2020-10-26 21:19:21,076 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-10-26 21:19:21,637 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-10-26 21:19:21,642 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-26 21:19:21,645 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-26 21:19:21,657 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-10-26 21:19:21,657 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 8
[2020-10-26 21:19:21,657 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-10-26 21:19:21,658 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 14
[2020-10-26 21:19:21,658 FATAL L256   erpolLogProxyWrapper]: Heuristic: SHALLOWEST
[2020-10-26 21:19:21,658 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 2
[2020-10-26 21:19:21,658 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 1
[2020-10-26 21:19:21,658 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 2
[2020-10-26 21:19:21,659 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-10-26 21:19:21,689 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8
[2020-10-26 21:19:21,694 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-26 21:19:21,696 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-26 21:19:21,718 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-10-26 21:19:21,718 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 12
[2020-10-26 21:19:21,718 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-10-26 21:19:21,718 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 23
[2020-10-26 21:19:21,719 FATAL L256   erpolLogProxyWrapper]: Heuristic: SHALLOWEST
[2020-10-26 21:19:21,719 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 4
[2020-10-26 21:19:21,719 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 0
[2020-10-26 21:19:21,719 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 12
[2020-10-26 21:19:21,719 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-10-26 21:19:21,751 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19
[2020-10-26 21:19:21,754 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-26 21:19:21,758 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-26 21:19:21,769 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-10-26 21:19:21,769 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 13
[2020-10-26 21:19:21,769 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-10-26 21:19:21,770 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 14
[2020-10-26 21:19:21,770 FATAL L256   erpolLogProxyWrapper]: Heuristic: SHALLOWEST
[2020-10-26 21:19:21,770 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-10-26 21:19:21,770 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 10
[2020-10-26 21:19:21,770 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-10-26 21:19:21,770 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-10-26 21:19:23,133 INFO  L134       CoverageAnalysis]: Checked inductivity of 28 backedges. 17 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked.
[2020-10-26 21:19:23,134 INFO  L353   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [200215276]
[2020-10-26 21:19:23,134 INFO  L219   FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-10-26 21:19:23,134 INFO  L232   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7
[2020-10-26 21:19:23,135 INFO  L155   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083100025]
[2020-10-26 21:19:23,137 INFO  L461      AbstractCegarLoop]: Interpolant automaton has 7 states
[2020-10-26 21:19:23,137 INFO  L142   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-10-26 21:19:23,138 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2020-10-26 21:19:23,138 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42
[2020-10-26 21:19:23,139 INFO  L87              Difference]: Start difference. First operand 11269 states and 17389 transitions. Second operand 7 states.
[2020-10-26 21:19:23,829 WARN  L193               SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 75
[2020-10-26 21:19:55,360 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-10-26 21:19:55,360 INFO  L93              Difference]: Finished difference Result 34275 states and 56644 transitions.
[2020-10-26 21:19:55,361 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. 
[2020-10-26 21:19:55,362 INFO  L78                 Accepts]: Start accepts. Automaton has 7 states. Word has length 1710
[2020-10-26 21:19:55,362 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-10-26 21:19:55,465 INFO  L225             Difference]: With dead ends: 34275
[2020-10-26 21:19:55,466 INFO  L226             Difference]: Without dead ends: 23012
[2020-10-26 21:19:55,504 INFO  L677         BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132
[2020-10-26 21:19:55,531 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 23012 states.
[2020-10-26 21:19:56,136 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 23012 to 22520.
[2020-10-26 21:19:56,137 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 22520 states.
[2020-10-26 21:19:56,201 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 22520 states to 22520 states and 31347 transitions.
[2020-10-26 21:19:56,201 INFO  L78                 Accepts]: Start accepts. Automaton has 22520 states and 31347 transitions. Word has length 1710
[2020-10-26 21:19:56,202 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-10-26 21:19:56,202 INFO  L481      AbstractCegarLoop]: Abstraction has 22520 states and 31347 transitions.
[2020-10-26 21:19:56,202 INFO  L482      AbstractCegarLoop]: Interpolant automaton has 7 states.
[2020-10-26 21:19:56,202 INFO  L276                IsEmpty]: Start isEmpty. Operand 22520 states and 31347 transitions.
[2020-10-26 21:19:56,305 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 1722
[2020-10-26 21:19:56,306 INFO  L414         BasicCegarLoop]: Found error trace
[2020-10-26 21:19:56,307 INFO  L422         BasicCegarLoop]: trace histogram [3, 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, 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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]
[2020-10-26 21:19:56,308 WARN  L518      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2020-10-26 21:19:56,308 INFO  L429      AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-10-26 21:19:56,308 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-10-26 21:19:56,309 INFO  L82        PathProgramCache]: Analyzing trace with hash -457283660, now seen corresponding path program 1 times
[2020-10-26 21:19:56,310 INFO  L162   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-10-26 21:19:56,310 INFO  L353   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1243074075]
[2020-10-26 21:19:56,311 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-10-26 21:19:56,447 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-26 21:19:56,481 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-26 21:19:56,796 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-26 21:19:57,234 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-26 21:20:01,475 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-10-26 21:20:01,475 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 1749
[2020-10-26 21:20:01,475 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 3
[2020-10-26 21:20:01,476 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 5023
[2020-10-26 21:20:01,478 FATAL L256   erpolLogProxyWrapper]: Heuristic: SHALLOWEST
[2020-10-26 21:20:01,478 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 8
[2020-10-26 21:20:01,478 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 5
[2020-10-26 21:20:01,478 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 42
[2020-10-26 21:20:01,479 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-10-26 21:20:02,122 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-10-26 21:20:02,127 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-26 21:20:02,131 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-26 21:20:02,143 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-10-26 21:20:02,143 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 8
[2020-10-26 21:20:02,144 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-10-26 21:20:02,144 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 15
[2020-10-26 21:20:02,144 FATAL L256   erpolLogProxyWrapper]: Heuristic: SHALLOWEST
[2020-10-26 21:20:02,144 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 2
[2020-10-26 21:20:02,144 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 1
[2020-10-26 21:20:02,145 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 2
[2020-10-26 21:20:02,145 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-10-26 21:20:02,171 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8
[2020-10-26 21:20:02,177 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-26 21:20:02,183 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-26 21:20:02,205 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-26 21:20:02,229 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-10-26 21:20:02,229 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 23
[2020-10-26 21:20:02,229 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 2
[2020-10-26 21:20:02,229 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 50
[2020-10-26 21:20:02,230 FATAL L256   erpolLogProxyWrapper]: Heuristic: SHALLOWEST
[2020-10-26 21:20:02,230 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 4
[2020-10-26 21:20:02,230 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 0
[2020-10-26 21:20:02,230 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 23
[2020-10-26 21:20:02,230 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-10-26 21:20:02,372 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30
[2020-10-26 21:20:02,387 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-26 21:20:02,389 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-26 21:20:02,408 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-10-26 21:20:02,408 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 13
[2020-10-26 21:20:02,408 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-10-26 21:20:02,409 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 20
[2020-10-26 21:20:02,409 FATAL L256   erpolLogProxyWrapper]: Heuristic: SHALLOWEST
[2020-10-26 21:20:02,409 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 4
[2020-10-26 21:20:02,409 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 0
[2020-10-26 21:20:02,409 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 13
[2020-10-26 21:20:02,409 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-10-26 21:20:03,757 INFO  L134       CoverageAnalysis]: Checked inductivity of 40 backedges. 34 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked.
[2020-10-26 21:20:03,758 INFO  L353   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1243074075]
[2020-10-26 21:20:03,758 INFO  L219   FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-10-26 21:20:03,758 INFO  L232   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7
[2020-10-26 21:20:03,758 INFO  L155   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409445523]
[2020-10-26 21:20:03,760 INFO  L461      AbstractCegarLoop]: Interpolant automaton has 8 states
[2020-10-26 21:20:03,760 INFO  L142   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-10-26 21:20:03,761 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2020-10-26 21:20:03,761 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56
[2020-10-26 21:20:03,761 INFO  L87              Difference]: Start difference. First operand 22520 states and 31347 transitions. Second operand 8 states.
[2020-10-26 21:20:35,201 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-10-26 21:20:35,201 INFO  L93              Difference]: Finished difference Result 56559 states and 83780 transitions.
[2020-10-26 21:20:35,203 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. 
[2020-10-26 21:20:35,203 INFO  L78                 Accepts]: Start accepts. Automaton has 8 states. Word has length 1721
[2020-10-26 21:20:35,203 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-10-26 21:20:35,345 INFO  L225             Difference]: With dead ends: 56559
[2020-10-26 21:20:35,345 INFO  L226             Difference]: Without dead ends: 34045
[2020-10-26 21:20:35,407 INFO  L677         BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210
[2020-10-26 21:20:35,445 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 34045 states.
[2020-10-26 21:20:36,249 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 34045 to 33334.
[2020-10-26 21:20:36,249 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 33334 states.
[2020-10-26 21:20:36,352 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 33334 states to 33334 states and 46501 transitions.
[2020-10-26 21:20:36,353 INFO  L78                 Accepts]: Start accepts. Automaton has 33334 states and 46501 transitions. Word has length 1721
[2020-10-26 21:20:36,353 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-10-26 21:20:36,353 INFO  L481      AbstractCegarLoop]: Abstraction has 33334 states and 46501 transitions.
[2020-10-26 21:20:36,354 INFO  L482      AbstractCegarLoop]: Interpolant automaton has 8 states.
[2020-10-26 21:20:36,354 INFO  L276                IsEmpty]: Start isEmpty. Operand 33334 states and 46501 transitions.
[2020-10-26 21:20:36,485 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 1728
[2020-10-26 21:20:36,485 INFO  L414         BasicCegarLoop]: Found error trace
[2020-10-26 21:20:36,487 INFO  L422         BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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[2020-10-26 21:20:36,487 WARN  L518      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3
[2020-10-26 21:20:36,487 INFO  L429      AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-10-26 21:20:36,488 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-10-26 21:20:36,488 INFO  L82        PathProgramCache]: Analyzing trace with hash -2102827550, now seen corresponding path program 1 times
[2020-10-26 21:20:36,489 INFO  L162   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-10-26 21:20:36,489 INFO  L353   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [839976357]
[2020-10-26 21:20:36,489 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-10-26 21:20:36,622 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-26 21:20:36,652 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-26 21:20:37,220 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-26 21:20:41,650 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-10-26 21:20:41,650 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 1753
[2020-10-26 21:20:41,650 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 2
[2020-10-26 21:20:41,651 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 5025
[2020-10-26 21:20:41,651 FATAL L256   erpolLogProxyWrapper]: Heuristic: SHALLOWEST
[2020-10-26 21:20:41,651 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 6
[2020-10-26 21:20:41,651 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 5
[2020-10-26 21:20:41,651 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 46
[2020-10-26 21:20:41,651 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-10-26 21:20:42,159 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-10-26 21:20:42,165 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-26 21:20:42,169 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-26 21:20:42,178 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-10-26 21:20:42,179 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 8
[2020-10-26 21:20:42,179 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-10-26 21:20:42,179 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 12
[2020-10-26 21:20:42,179 FATAL L256   erpolLogProxyWrapper]: Heuristic: SHALLOWEST
[2020-10-26 21:20:42,179 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 2
[2020-10-26 21:20:42,179 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 1
[2020-10-26 21:20:42,180 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 2
[2020-10-26 21:20:42,180 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-10-26 21:20:42,214 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8
[2020-10-26 21:20:42,224 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-26 21:20:42,232 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-26 21:20:42,297 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-10-26 21:20:42,298 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 41
[2020-10-26 21:20:42,298 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-10-26 21:20:42,298 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 72
[2020-10-26 21:20:42,298 FATAL L256   erpolLogProxyWrapper]: Heuristic: SHALLOWEST
[2020-10-26 21:20:42,298 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 4
[2020-10-26 21:20:42,299 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 0
[2020-10-26 21:20:42,299 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 41
[2020-10-26 21:20:42,299 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-10-26 21:20:43,547 INFO  L134       CoverageAnalysis]: Checked inductivity of 37 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-10-26 21:20:43,547 INFO  L353   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [839976357]
[2020-10-26 21:20:43,547 INFO  L219   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-10-26 21:20:43,548 INFO  L232   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2020-10-26 21:20:43,548 INFO  L155   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430297679]
[2020-10-26 21:20:43,549 INFO  L461      AbstractCegarLoop]: Interpolant automaton has 8 states
[2020-10-26 21:20:43,549 INFO  L142   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-10-26 21:20:43,550 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2020-10-26 21:20:43,550 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56
[2020-10-26 21:20:43,550 INFO  L87              Difference]: Start difference. First operand 33334 states and 46501 transitions. Second operand 8 states.