/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_label18.c


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


This is Ultimate 0.2.0-0f64333
[2020-10-26 21:13:57,986 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2020-10-26 21:13:57,989 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2020-10-26 21:13:58,025 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2020-10-26 21:13:58,025 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2020-10-26 21:13:58,027 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2020-10-26 21:13:58,029 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2020-10-26 21:13:58,031 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2020-10-26 21:13:58,042 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2020-10-26 21:13:58,044 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
[2020-10-26 21:13:58,045 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
[2020-10-26 21:13:58,046 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2020-10-26 21:13:58,047 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2020-10-26 21:13:58,048 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2020-10-26 21:13:58,049 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2020-10-26 21:13:58,051 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2020-10-26 21:13:58,052 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2020-10-26 21:13:58,053 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2020-10-26 21:13:58,055 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2020-10-26 21:13:58,058 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2020-10-26 21:13:58,060 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2020-10-26 21:13:58,064 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2020-10-26 21:13:58,065 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2020-10-26 21:13:58,066 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2020-10-26 21:13:58,070 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2020-10-26 21:13:58,070 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2020-10-26 21:13:58,071 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2020-10-26 21:13:58,072 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2020-10-26 21:13:58,072 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2020-10-26 21:13:58,089 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2020-10-26 21:13:58,089 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2020-10-26 21:13:58,090 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2020-10-26 21:13:58,092 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2020-10-26 21:13:58,093 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2020-10-26 21:13:58,094 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2020-10-26 21:13:58,095 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
[2020-10-26 21:13:58,096 INFO  L184        SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2020-10-26 21:13:58,099 INFO  L184        SettingsManager]: ReqParser provides no preferences, ignoring...
[2020-10-26 21:13:58,100 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
[2020-10-26 21:13:58,101 INFO  L181        SettingsManager]: Resetting Witness Parser preferences to default values
[2020-10-26 21:13:58,103 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2020-10-26 21:13:58,105 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 21:13:58,132 INFO  L113        SettingsManager]: Loading preferences was successful
[2020-10-26 21:13:58,132 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2020-10-26 21:13:58,134 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2020-10-26 21:13:58,134 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2020-10-26 21:13:58,134 INFO  L138        SettingsManager]:  * Use SBE=true
[2020-10-26 21:13:58,134 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2020-10-26 21:13:58,134 INFO  L138        SettingsManager]:  * sizeof long=4
[2020-10-26 21:13:58,135 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2020-10-26 21:13:58,135 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2020-10-26 21:13:58,135 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2020-10-26 21:13:58,135 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2020-10-26 21:13:58,135 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2020-10-26 21:13:58,136 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2020-10-26 21:13:58,136 INFO  L138        SettingsManager]:  * sizeof long double=12
[2020-10-26 21:13:58,136 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2020-10-26 21:13:58,136 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2020-10-26 21:13:58,136 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2020-10-26 21:13:58,137 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2020-10-26 21:13:58,137 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2020-10-26 21:13:58,137 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2020-10-26 21:13:58,137 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2020-10-26 21:13:58,137 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-10-26 21:13:58,138 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2020-10-26 21:13:58,138 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2020-10-26 21:13:58,138 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2020-10-26 21:13:58,138 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2020-10-26 21:13:58,138 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-10-26 21:13:58,139 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2020-10-26 21:13:58,139 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2020-10-26 21:13:58,139 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$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true;
[2020-10-26 21:13:58,510 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2020-10-26 21:13:58,538 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2020-10-26 21:13:58,541 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2020-10-26 21:13:58,543 INFO  L271        PluginConnector]: Initializing CDTParser...
[2020-10-26 21:13:58,544 INFO  L275        PluginConnector]: CDTParser initialized
[2020-10-26 21:13:58,545 INFO  L432   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem05_label18.c
[2020-10-26 21:13:58,642 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e7cfd3b6f/76d57b4aa0984394bbfe0f5d800f5d02/FLAG57223aed3
[2020-10-26 21:13:59,990 INFO  L306              CDTParser]: Found 1 translation units.
[2020-10-26 21:13:59,991 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem05_label18.c
[2020-10-26 21:14:00,066 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e7cfd3b6f/76d57b4aa0984394bbfe0f5d800f5d02/FLAG57223aed3
[2020-10-26 21:14:00,602 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e7cfd3b6f/76d57b4aa0984394bbfe0f5d800f5d02
[2020-10-26 21:14:00,607 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2020-10-26 21:14:00,615 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2020-10-26 21:14:00,619 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2020-10-26 21:14:00,619 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2020-10-26 21:14:00,624 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2020-10-26 21:14:00,625 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 09:14:00" (1/1) ...
[2020-10-26 21:14:00,629 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2d1530af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:14:00, skipping insertion in model container
[2020-10-26 21:14:00,629 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 09:14:00" (1/1) ...
[2020-10-26 21:14:00,639 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2020-10-26 21:14:00,914 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2020-10-26 21:14:03,255 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-10-26 21:14:03,332 INFO  L203         MainTranslator]: Completed pre-run
[2020-10-26 21:14:04,646 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-10-26 21:14:04,766 INFO  L208         MainTranslator]: Completed translation
[2020-10-26 21:14:04,767 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:14:04 WrapperNode
[2020-10-26 21:14:04,767 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2020-10-26 21:14:04,769 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2020-10-26 21:14:04,769 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2020-10-26 21:14:04,769 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2020-10-26 21:14:04,784 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:14:04" (1/1) ...
[2020-10-26 21:14:04,786 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:14:04" (1/1) ...
[2020-10-26 21:14:04,884 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:14:04" (1/1) ...
[2020-10-26 21:14:04,885 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:14:04" (1/1) ...
[2020-10-26 21:14:05,093 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:14:04" (1/1) ...
[2020-10-26 21:14:05,155 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:14:04" (1/1) ...
[2020-10-26 21:14:05,212 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:14:04" (1/1) ...
[2020-10-26 21:14:05,283 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2020-10-26 21:14:05,285 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2020-10-26 21:14:05,285 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2020-10-26 21:14:05,285 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2020-10-26 21:14:05,286 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:14:04" (1/1) ...
No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-10-26 21:14:05,365 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2020-10-26 21:14:05,365 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2020-10-26 21:14:05,366 INFO  L138     BoogieDeclarations]: Found implementation of procedure reach_error
[2020-10-26 21:14:05,366 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output
[2020-10-26 21:14:05,366 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output2
[2020-10-26 21:14:05,366 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output3
[2020-10-26 21:14:05,366 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output4
[2020-10-26 21:14:05,366 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output5
[2020-10-26 21:14:05,367 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output6
[2020-10-26 21:14:05,367 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output7
[2020-10-26 21:14:05,367 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output8
[2020-10-26 21:14:05,367 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2020-10-26 21:14:05,367 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output
[2020-10-26 21:14:05,368 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output2
[2020-10-26 21:14:05,368 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output3
[2020-10-26 21:14:05,368 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output4
[2020-10-26 21:14:05,368 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output5
[2020-10-26 21:14:05,368 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output6
[2020-10-26 21:14:05,368 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output7
[2020-10-26 21:14:05,369 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output8
[2020-10-26 21:14:05,369 INFO  L130     BoogieDeclarations]: Found specification of procedure abort
[2020-10-26 21:14:05,369 INFO  L130     BoogieDeclarations]: Found specification of procedure __assert_fail
[2020-10-26 21:14:05,369 INFO  L130     BoogieDeclarations]: Found specification of procedure reach_error
[2020-10-26 21:14:05,369 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack
[2020-10-26 21:14:05,369 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int
[2020-10-26 21:14:05,369 INFO  L130     BoogieDeclarations]: Found specification of procedure exit
[2020-10-26 21:14:05,370 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2020-10-26 21:14:05,370 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2020-10-26 21:14:05,370 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~int
[2020-10-26 21:14:05,370 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2020-10-26 21:14:05,370 INFO  L130     BoogieDeclarations]: Found specification of procedure write~int
[2020-10-26 21:14:05,370 INFO  L130     BoogieDeclarations]: Found specification of procedure read~int
[2020-10-26 21:14:05,371 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc
[2020-10-26 21:14:15,179 INFO  L293             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2020-10-26 21:14:15,179 INFO  L298             CfgBuilder]: Removed 1 assume(true) statements.
[2020-10-26 21:14:15,185 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 09:14:15 BoogieIcfgContainer
[2020-10-26 21:14:15,186 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2020-10-26 21:14:15,190 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2020-10-26 21:14:15,190 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2020-10-26 21:14:15,194 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2020-10-26 21:14:15,194 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 09:14:00" (1/3) ...
[2020-10-26 21:14:15,195 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6dd24666 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 09:14:15, skipping insertion in model container
[2020-10-26 21:14:15,196 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:14:04" (2/3) ...
[2020-10-26 21:14:15,197 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6dd24666 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 09:14:15, skipping insertion in model container
[2020-10-26 21:14:15,197 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 09:14:15" (3/3) ...
[2020-10-26 21:14:15,199 INFO  L111   eAbstractionObserver]: Analyzing ICFG Problem05_label18.c
[2020-10-26 21:14:15,212 INFO  L164   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION
[2020-10-26 21:14:15,222 INFO  L176   ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2020-10-26 21:14:15,236 INFO  L253      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2020-10-26 21:14:15,279 INFO  L377      AbstractCegarLoop]: Interprodecural is true
[2020-10-26 21:14:15,279 INFO  L378      AbstractCegarLoop]: Hoare is true
[2020-10-26 21:14:15,279 INFO  L379      AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation
[2020-10-26 21:14:15,279 INFO  L380      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2020-10-26 21:14:15,279 INFO  L381      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2020-10-26 21:14:15,280 INFO  L382      AbstractCegarLoop]: Difference is false
[2020-10-26 21:14:15,280 INFO  L383      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2020-10-26 21:14:15,280 INFO  L387      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2020-10-26 21:14:15,339 INFO  L276                IsEmpty]: Start isEmpty. Operand 2226 states.
[2020-10-26 21:14:15,469 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 1664
[2020-10-26 21:14:15,469 INFO  L414         BasicCegarLoop]: Found error trace
[2020-10-26 21:14:15,472 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]
[2020-10-26 21:14:15,473 INFO  L429      AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-10-26 21:14:15,479 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-10-26 21:14:15,481 INFO  L82        PathProgramCache]: Analyzing trace with hash -1182010511, now seen corresponding path program 1 times
[2020-10-26 21:14:15,491 INFO  L162   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-10-26 21:14:15,492 INFO  L353   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [583000945]
[2020-10-26 21:14:15,493 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-10-26 21:14:16,709 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-26 21:14:17,216 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-26 21:14:21,929 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-10-26 21:14:21,929 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 1687
[2020-10-26 21:14:21,930 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-10-26 21:14:21,930 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 5208
[2020-10-26 21:14:21,932 FATAL L256   erpolLogProxyWrapper]: Heuristic: SHALLOWEST
[2020-10-26 21:14:21,932 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 20
[2020-10-26 21:14:21,932 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 5
[2020-10-26 21:14:21,932 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 1678
[2020-10-26 21:14:21,933 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 2
[2020-10-26 21:14:23,556 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-10-26 21:14:23,571 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-26 21:14:23,578 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-26 21:14:23,601 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-10-26 21:14:23,601 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 8
[2020-10-26 21:14:23,602 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-10-26 21:14:23,602 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 29
[2020-10-26 21:14:23,602 FATAL L256   erpolLogProxyWrapper]: Heuristic: SHALLOWEST
[2020-10-26 21:14:23,602 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 2
[2020-10-26 21:14:23,603 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 1
[2020-10-26 21:14:23,603 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 2
[2020-10-26 21:14:23,603 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-10-26 21:14:26,697 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 21:14:26,697 INFO  L353   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [583000945]
[2020-10-26 21:14:26,699 INFO  L219   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-10-26 21:14:26,700 INFO  L232   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-10-26 21:14:26,700 INFO  L155   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925327345]
[2020-10-26 21:14:26,709 INFO  L461      AbstractCegarLoop]: Interpolant automaton has 5 states
[2020-10-26 21:14:26,709 INFO  L142   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-10-26 21:14:26,724 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2020-10-26 21:14:26,725 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20
[2020-10-26 21:14:26,727 INFO  L87              Difference]: Start difference. First operand 2226 states. Second operand 5 states.
[2020-10-26 21:15:01,889 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-10-26 21:15:01,890 INFO  L93              Difference]: Finished difference Result 8239 states and 15621 transitions.
[2020-10-26 21:15:01,891 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2020-10-26 21:15:01,893 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 1663
[2020-10-26 21:15:01,904 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-10-26 21:15:01,971 INFO  L225             Difference]: With dead ends: 8239
[2020-10-26 21:15:01,972 INFO  L226             Difference]: Without dead ends: 5945
[2020-10-26 21:15:01,988 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 21:15:02,022 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 5945 states.
[2020-10-26 21:15:02,273 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 5945 to 5826.
[2020-10-26 21:15:02,275 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 5826 states.
[2020-10-26 21:15:02,310 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5826 states to 5826 states and 10165 transitions.
[2020-10-26 21:15:02,312 INFO  L78                 Accepts]: Start accepts. Automaton has 5826 states and 10165 transitions. Word has length 1663
[2020-10-26 21:15:02,319 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-10-26 21:15:02,320 INFO  L481      AbstractCegarLoop]: Abstraction has 5826 states and 10165 transitions.
[2020-10-26 21:15:02,320 INFO  L482      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2020-10-26 21:15:02,321 INFO  L276                IsEmpty]: Start isEmpty. Operand 5826 states and 10165 transitions.
[2020-10-26 21:15:02,540 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 1690
[2020-10-26 21:15:02,540 INFO  L414         BasicCegarLoop]: Found error trace
[2020-10-26 21:15:02,542 INFO  L422         BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 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 21:15:02,542 WARN  L518      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2020-10-26 21:15:02,543 INFO  L429      AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-10-26 21:15:02,544 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-10-26 21:15:02,545 INFO  L82        PathProgramCache]: Analyzing trace with hash 1364104726, now seen corresponding path program 1 times
[2020-10-26 21:15:02,547 INFO  L162   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-10-26 21:15:02,547 INFO  L353   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [606099124]
[2020-10-26 21:15:02,548 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-10-26 21:15:02,756 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-26 21:15:02,792 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-26 21:15:03,184 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-26 21:15:07,908 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-10-26 21:15:07,908 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 1715
[2020-10-26 21:15:07,908 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 2
[2020-10-26 21:15:07,909 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 5148
[2020-10-26 21:15:07,909 FATAL L256   erpolLogProxyWrapper]: Heuristic: SHALLOWEST
[2020-10-26 21:15:07,910 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 6
[2020-10-26 21:15:07,910 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 5
[2020-10-26 21:15:07,910 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 30
[2020-10-26 21:15:07,910 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-10-26 21:15:09,070 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-10-26 21:15:09,079 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-26 21:15:09,084 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-26 21:15:09,099 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-10-26 21:15:09,107 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 8
[2020-10-26 21:15:09,108 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-10-26 21:15:09,108 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 19
[2020-10-26 21:15:09,108 FATAL L256   erpolLogProxyWrapper]: Heuristic: SHALLOWEST
[2020-10-26 21:15:09,108 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 2
[2020-10-26 21:15:09,109 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 1
[2020-10-26 21:15:09,109 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 2
[2020-10-26 21:15:09,109 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-10-26 21:15:09,137 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8
[2020-10-26 21:15:09,152 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-26 21:15:09,158 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-26 21:15:09,205 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-10-26 21:15:09,206 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 27
[2020-10-26 21:15:09,206 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-10-26 21:15:09,206 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 52
[2020-10-26 21:15:09,206 FATAL L256   erpolLogProxyWrapper]: Heuristic: SHALLOWEST
[2020-10-26 21:15:09,206 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 4
[2020-10-26 21:15:09,207 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 0
[2020-10-26 21:15:09,207 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 27
[2020-10-26 21:15:09,207 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-10-26 21:15:10,321 INFO  L134       CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-10-26 21:15:10,322 INFO  L353   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [606099124]
[2020-10-26 21:15:10,322 INFO  L219   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-10-26 21:15:10,323 INFO  L232   FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6
[2020-10-26 21:15:10,323 INFO  L155   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6022081]
[2020-10-26 21:15:10,327 INFO  L461      AbstractCegarLoop]: Interpolant automaton has 7 states
[2020-10-26 21:15:10,327 INFO  L142   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-10-26 21:15:10,328 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2020-10-26 21:15:10,328 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42
[2020-10-26 21:15:10,328 INFO  L87              Difference]: Start difference. First operand 5826 states and 10165 transitions. Second operand 7 states.
[2020-10-26 21:15:40,969 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-10-26 21:15:40,969 INFO  L93              Difference]: Finished difference Result 17227 states and 30586 transitions.
[2020-10-26 21:15:40,971 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2020-10-26 21:15:40,971 INFO  L78                 Accepts]: Start accepts. Automaton has 7 states. Word has length 1689
[2020-10-26 21:15:40,972 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-10-26 21:15:41,039 INFO  L225             Difference]: With dead ends: 17227
[2020-10-26 21:15:41,039 INFO  L226             Difference]: Without dead ends: 11407
[2020-10-26 21:15:41,058 INFO  L677         BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132
[2020-10-26 21:15:41,072 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 11407 states.
[2020-10-26 21:15:41,376 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 11407 to 11260.
[2020-10-26 21:15:41,377 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 11260 states.
[2020-10-26 21:15:41,408 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 11260 states to 11260 states and 17381 transitions.
[2020-10-26 21:15:41,409 INFO  L78                 Accepts]: Start accepts. Automaton has 11260 states and 17381 transitions. Word has length 1689
[2020-10-26 21:15:41,409 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-10-26 21:15:41,410 INFO  L481      AbstractCegarLoop]: Abstraction has 11260 states and 17381 transitions.
[2020-10-26 21:15:41,410 INFO  L482      AbstractCegarLoop]: Interpolant automaton has 7 states.
[2020-10-26 21:15:41,410 INFO  L276                IsEmpty]: Start isEmpty. Operand 11260 states and 17381 transitions.
[2020-10-26 21:15:41,493 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 1701
[2020-10-26 21:15:41,493 INFO  L414         BasicCegarLoop]: Found error trace
[2020-10-26 21:15:41,495 INFO  L422         BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-10-26 21:15:41,495 WARN  L518      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2020-10-26 21:15:41,495 INFO  L429      AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-10-26 21:15:41,496 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-10-26 21:15:41,497 INFO  L82        PathProgramCache]: Analyzing trace with hash -1318025186, now seen corresponding path program 1 times
[2020-10-26 21:15:41,497 INFO  L162   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-10-26 21:15:41,498 INFO  L353   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1569603752]
[2020-10-26 21:15:41,498 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-10-26 21:15:41,629 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-26 21:15:41,661 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-26 21:15:41,723 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-26 21:15:42,200 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-26 21:15:46,734 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-10-26 21:15:46,735 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 1728
[2020-10-26 21:15:46,735 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 3
[2020-10-26 21:15:46,738 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 5101
[2020-10-26 21:15:46,738 FATAL L256   erpolLogProxyWrapper]: Heuristic: SHALLOWEST
[2020-10-26 21:15:46,739 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 6
[2020-10-26 21:15:46,739 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 5
[2020-10-26 21:15:46,739 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 17
[2020-10-26 21:15:46,739 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-10-26 21:15:47,319 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-10-26 21:15:47,327 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-26 21:15:47,330 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-26 21:15:47,345 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-10-26 21:15:47,345 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 8
[2020-10-26 21:15:47,345 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-10-26 21:15:47,345 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 17
[2020-10-26 21:15:47,345 FATAL L256   erpolLogProxyWrapper]: Heuristic: SHALLOWEST
[2020-10-26 21:15:47,346 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 2
[2020-10-26 21:15:47,346 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 1
[2020-10-26 21:15:47,346 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 2
[2020-10-26 21:15:47,346 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-10-26 21:15:47,372 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8
[2020-10-26 21:15:47,376 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-26 21:15:47,380 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-26 21:15:47,404 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-10-26 21:15:47,405 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 12
[2020-10-26 21:15:47,405 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-10-26 21:15:47,405 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 27
[2020-10-26 21:15:47,405 FATAL L256   erpolLogProxyWrapper]: Heuristic: SHALLOWEST
[2020-10-26 21:15:47,405 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 4
[2020-10-26 21:15:47,406 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 0
[2020-10-26 21:15:47,406 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 12
[2020-10-26 21:15:47,406 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-10-26 21:15:47,434 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19
[2020-10-26 21:15:47,441 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-26 21:15:47,445 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-26 21:15:47,459 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-10-26 21:15:47,459 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 27
[2020-10-26 21:15:47,459 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-10-26 21:15:47,460 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 17
[2020-10-26 21:15:47,460 FATAL L256   erpolLogProxyWrapper]: Heuristic: SHALLOWEST
[2020-10-26 21:15:47,460 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-10-26 21:15:47,460 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 24
[2020-10-26 21:15:47,460 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-10-26 21:15:47,461 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-10-26 21:15:48,820 INFO  L134       CoverageAnalysis]: Checked inductivity of 40 backedges. 29 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked.
[2020-10-26 21:15:48,821 INFO  L353   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1569603752]
[2020-10-26 21:15:48,821 INFO  L219   FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-10-26 21:15:48,821 INFO  L232   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7
[2020-10-26 21:15:48,822 INFO  L155   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777458698]
[2020-10-26 21:15:48,825 INFO  L461      AbstractCegarLoop]: Interpolant automaton has 7 states
[2020-10-26 21:15:48,825 INFO  L142   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-10-26 21:15:48,826 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2020-10-26 21:15:48,826 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42
[2020-10-26 21:15:48,826 INFO  L87              Difference]: Start difference. First operand 11260 states and 17381 transitions. Second operand 7 states.
[2020-10-26 21:16:38,112 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-10-26 21:16:38,112 INFO  L93              Difference]: Finished difference Result 44653 states and 74018 transitions.
[2020-10-26 21:16:38,113 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. 
[2020-10-26 21:16:38,114 INFO  L78                 Accepts]: Start accepts. Automaton has 7 states. Word has length 1700
[2020-10-26 21:16:38,114 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-10-26 21:16:38,258 INFO  L225             Difference]: With dead ends: 44653
[2020-10-26 21:16:38,259 INFO  L226             Difference]: Without dead ends: 33399
[2020-10-26 21:16:38,308 INFO  L677         BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132
[2020-10-26 21:16:38,352 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 33399 states.
[2020-10-26 21:16:39,389 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 33399 to 33346.
[2020-10-26 21:16:39,389 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 33346 states.
[2020-10-26 21:16:39,480 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 33346 states to 33346 states and 47700 transitions.
[2020-10-26 21:16:39,481 INFO  L78                 Accepts]: Start accepts. Automaton has 33346 states and 47700 transitions. Word has length 1700
[2020-10-26 21:16:39,481 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-10-26 21:16:39,482 INFO  L481      AbstractCegarLoop]: Abstraction has 33346 states and 47700 transitions.
[2020-10-26 21:16:39,482 INFO  L482      AbstractCegarLoop]: Interpolant automaton has 7 states.
[2020-10-26 21:16:39,482 INFO  L276                IsEmpty]: Start isEmpty. Operand 33346 states and 47700 transitions.
[2020-10-26 21:16:39,636 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 1724
[2020-10-26 21:16:39,636 INFO  L414         BasicCegarLoop]: Found error trace
[2020-10-26 21:16:39,638 INFO  L422         BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:16:39,639 WARN  L518      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2020-10-26 21:16:39,639 INFO  L429      AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-10-26 21:16:39,640 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-10-26 21:16:39,641 INFO  L82        PathProgramCache]: Analyzing trace with hash -976473031, now seen corresponding path program 1 times
[2020-10-26 21:16:39,641 INFO  L162   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-10-26 21:16:39,641 INFO  L353   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1770869800]
[2020-10-26 21:16:39,642 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-10-26 21:16:39,776 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-26 21:16:39,805 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-26 21:16:39,875 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-26 21:16:40,010 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-26 21:16:41,130 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-26 21:16:44,079 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-26 21:16:45,019 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-10-26 21:16:45,019 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 1753
[2020-10-26 21:16:45,020 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 5
[2020-10-26 21:16:45,020 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 5239
[2020-10-26 21:16:45,020 FATAL L256   erpolLogProxyWrapper]: Heuristic: SHALLOWEST
[2020-10-26 21:16:45,020 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 8
[2020-10-26 21:16:45,020 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 5
[2020-10-26 21:16:45,021 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 42
[2020-10-26 21:16:45,021 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-10-26 21:16:45,474 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-10-26 21:16:45,481 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-26 21:16:45,484 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-26 21:16:45,495 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-10-26 21:16:45,496 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 8
[2020-10-26 21:16:45,496 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-10-26 21:16:45,496 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 14
[2020-10-26 21:16:45,496 FATAL L256   erpolLogProxyWrapper]: Heuristic: SHALLOWEST
[2020-10-26 21:16:45,496 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 2
[2020-10-26 21:16:45,497 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 1
[2020-10-26 21:16:45,497 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 2
[2020-10-26 21:16:45,497 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-10-26 21:16:45,524 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8
[2020-10-26 21:16:45,530 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-26 21:16:45,534 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-26 21:16:45,549 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-26 21:16:45,581 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-10-26 21:16:45,582 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 23
[2020-10-26 21:16:45,582 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 2
[2020-10-26 21:16:45,582 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 50
[2020-10-26 21:16:45,582 FATAL L256   erpolLogProxyWrapper]: Heuristic: SHALLOWEST
[2020-10-26 21:16:45,582 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 4
[2020-10-26 21:16:45,582 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 0
[2020-10-26 21:16:45,583 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 23
[2020-10-26 21:16:45,583 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-10-26 21:16:45,604 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30
[2020-10-26 21:16:45,608 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-26 21:16:45,610 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-26 21:16:45,628 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-10-26 21:16:45,629 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 13
[2020-10-26 21:16:45,629 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-10-26 21:16:45,629 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 20
[2020-10-26 21:16:45,629 FATAL L256   erpolLogProxyWrapper]: Heuristic: SHALLOWEST
[2020-10-26 21:16:45,629 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 4
[2020-10-26 21:16:45,629 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 0
[2020-10-26 21:16:45,630 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 13
[2020-10-26 21:16:45,630 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-10-26 21:16:45,658 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42
[2020-10-26 21:16:45,664 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-26 21:16:45,669 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-26 21:16:45,682 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-10-26 21:16:45,682 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 27
[2020-10-26 21:16:45,683 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-10-26 21:16:45,683 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 17
[2020-10-26 21:16:45,683 FATAL L256   erpolLogProxyWrapper]: Heuristic: SHALLOWEST
[2020-10-26 21:16:45,683 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-10-26 21:16:45,683 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 24
[2020-10-26 21:16:45,683 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-10-26 21:16:45,683 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-10-26 21:16:47,212 INFO  L134       CoverageAnalysis]: Checked inductivity of 95 backedges. 54 proven. 26 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked.
[2020-10-26 21:16:47,212 INFO  L353   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1770869800]
[2020-10-26 21:16:47,212 INFO  L219   FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-10-26 21:16:47,213 INFO  L232   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8
[2020-10-26 21:16:47,213 INFO  L155   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73387355]
[2020-10-26 21:16:47,215 INFO  L461      AbstractCegarLoop]: Interpolant automaton has 8 states
[2020-10-26 21:16:47,215 INFO  L142   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-10-26 21:16:47,216 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2020-10-26 21:16:47,216 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56
[2020-10-26 21:16:47,216 INFO  L87              Difference]: Start difference. First operand 33346 states and 47700 transitions. Second operand 8 states.
[2020-10-26 21:17:34,414 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-10-26 21:17:34,414 INFO  L93              Difference]: Finished difference Result 77924 states and 120839 transitions.
[2020-10-26 21:17:34,415 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. 
[2020-10-26 21:17:34,415 INFO  L78                 Accepts]: Start accepts. Automaton has 8 states. Word has length 1723
[2020-10-26 21:17:34,416 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-10-26 21:17:34,608 INFO  L225             Difference]: With dead ends: 77924
[2020-10-26 21:17:34,608 INFO  L226             Difference]: Without dead ends: 44632
[2020-10-26 21:17:34,686 INFO  L677         BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240
[2020-10-26 21:17:34,736 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 44632 states.
[2020-10-26 21:17:35,959 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 44632 to 44496.
[2020-10-26 21:17:35,959 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 44496 states.
[2020-10-26 21:17:36,089 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 44496 states to 44496 states and 65265 transitions.
[2020-10-26 21:17:36,091 INFO  L78                 Accepts]: Start accepts. Automaton has 44496 states and 65265 transitions. Word has length 1723
[2020-10-26 21:17:36,092 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-10-26 21:17:36,092 INFO  L481      AbstractCegarLoop]: Abstraction has 44496 states and 65265 transitions.
[2020-10-26 21:17:36,092 INFO  L482      AbstractCegarLoop]: Interpolant automaton has 8 states.
[2020-10-26 21:17:36,092 INFO  L276                IsEmpty]: Start isEmpty. Operand 44496 states and 65265 transitions.
[2020-10-26 21:17:36,244 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 1735
[2020-10-26 21:17:36,245 INFO  L414         BasicCegarLoop]: Found error trace
[2020-10-26 21:17:36,246 INFO  L422         BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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[2020-10-26 21:17:36,247 WARN  L518      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3
[2020-10-26 21:17:36,247 INFO  L429      AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-10-26 21:17:36,247 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-10-26 21:17:36,248 INFO  L82        PathProgramCache]: Analyzing trace with hash 774379159, now seen corresponding path program 1 times
[2020-10-26 21:17:36,248 INFO  L162   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-10-26 21:17:36,249 INFO  L353   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1930329049]
[2020-10-26 21:17:36,249 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-10-26 21:17:36,381 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-26 21:17:36,416 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-26 21:17:36,497 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-26 21:17:36,772 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-26 21:17:41,455 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-10-26 21:17:41,455 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 1762
[2020-10-26 21:17:41,456 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 3
[2020-10-26 21:17:41,456 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 5068
[2020-10-26 21:17:41,456 FATAL L256   erpolLogProxyWrapper]: Heuristic: SHALLOWEST
[2020-10-26 21:17:41,456 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 6
[2020-10-26 21:17:41,456 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 5
[2020-10-26 21:17:41,456 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 46
[2020-10-26 21:17:41,456 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-10-26 21:17:41,881 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-10-26 21:17:41,886 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-26 21:17:41,888 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-26 21:17:41,897 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-10-26 21:17:41,897 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 8
[2020-10-26 21:17:41,897 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-10-26 21:17:41,897 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 10
[2020-10-26 21:17:41,898 FATAL L256   erpolLogProxyWrapper]: Heuristic: SHALLOWEST
[2020-10-26 21:17:41,898 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 2
[2020-10-26 21:17:41,898 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 1
[2020-10-26 21:17:41,898 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 2
[2020-10-26 21:17:41,898 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0