./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive/Fibonacci02_true-unreach-call_true-no-overflow_true-termination.c --full-output --architecture 32bit
--------------------------------------------------------------------------------
Checking for ERROR reachability
Using default analysis
Version 635dfa2a
Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_a72b2d65-e2b1-46d2-8035-0e5289f9a905/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_a72b2d65-e2b1-46d2-8035-0e5289f9a905/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_a72b2d65-e2b1-46d2-8035-0e5289f9a905/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_a72b2d65-e2b1-46d2-8035-0e5289f9a905/bin-2019/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive/Fibonacci02_true-unreach-call_true-no-overflow_true-termination.c -s /tmp/vcloud-vcloud-master/worker/working_dir_a72b2d65-e2b1-46d2-8035-0e5289f9a905/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_a72b2d65-e2b1-46d2-8035-0e5289f9a905/bin-2019/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) )
--witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 7e40a98558d0111ea95f3ee60a44cc14c7768182
..................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................
Execution finished normally
Writing output log to file Ultimate.log
Result:
TRUE
--- Real Ultimate output ---
This is Ultimate 0.1.23-635dfa2
[2018-12-08 07:54:31,741 INFO L170 SettingsManager]: Resetting all preferences to default values...
[2018-12-08 07:54:31,743 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values
[2018-12-08 07:54:31,750 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2018-12-08 07:54:31,750 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2018-12-08 07:54:31,751 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2018-12-08 07:54:31,751 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2018-12-08 07:54:31,752 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values
[2018-12-08 07:54:31,753 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values
[2018-12-08 07:54:31,753 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values
[2018-12-08 07:54:31,754 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2018-12-08 07:54:31,754 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values
[2018-12-08 07:54:31,754 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values
[2018-12-08 07:54:31,754 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2018-12-08 07:54:31,755 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values
[2018-12-08 07:54:31,755 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2018-12-08 07:54:31,756 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2018-12-08 07:54:31,757 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2018-12-08 07:54:31,757 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values
[2018-12-08 07:54:31,758 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2018-12-08 07:54:31,759 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values
[2018-12-08 07:54:31,759 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values
[2018-12-08 07:54:31,760 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2018-12-08 07:54:31,760 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2018-12-08 07:54:31,760 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values
[2018-12-08 07:54:31,761 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values
[2018-12-08 07:54:31,761 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values
[2018-12-08 07:54:31,762 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values
[2018-12-08 07:54:31,762 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values
[2018-12-08 07:54:31,763 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2018-12-08 07:54:31,763 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values
[2018-12-08 07:54:31,763 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2018-12-08 07:54:31,763 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring...
[2018-12-08 07:54:31,763 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values
[2018-12-08 07:54:31,764 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values
[2018-12-08 07:54:31,764 INFO L181 SettingsManager]: Finished resetting all preferences to default values...
[2018-12-08 07:54:31,764 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_a72b2d65-e2b1-46d2-8035-0e5289f9a905/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf
[2018-12-08 07:54:31,771 INFO L110 SettingsManager]: Loading preferences was successful
[2018-12-08 07:54:31,771 INFO L112 SettingsManager]: Preferences different from defaults after loading the file:
[2018-12-08 07:54:31,771 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2018-12-08 07:54:31,772 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS
[2018-12-08 07:54:31,772 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2018-12-08 07:54:31,772 INFO L133 SettingsManager]: * Create parallel compositions if possible=false
[2018-12-08 07:54:31,772 INFO L133 SettingsManager]: * Use SBE=true
[2018-12-08 07:54:31,772 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2018-12-08 07:54:31,772 INFO L133 SettingsManager]: * sizeof long=4
[2018-12-08 07:54:31,772 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true
[2018-12-08 07:54:31,772 INFO L133 SettingsManager]: * sizeof POINTER=4
[2018-12-08 07:54:31,772 INFO L133 SettingsManager]: * Check division by zero=IGNORE
[2018-12-08 07:54:31,773 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE
[2018-12-08 07:54:31,773 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE
[2018-12-08 07:54:31,773 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE
[2018-12-08 07:54:31,773 INFO L133 SettingsManager]: * sizeof long double=12
[2018-12-08 07:54:31,773 INFO L133 SettingsManager]: * Check if freed pointer was valid=false
[2018-12-08 07:54:31,773 INFO L133 SettingsManager]: * Use constant arrays=true
[2018-12-08 07:54:31,773 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE
[2018-12-08 07:54:31,773 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2018-12-08 07:54:31,773 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements
[2018-12-08 07:54:31,773 INFO L133 SettingsManager]: * To the following directory=./dump/
[2018-12-08 07:54:31,773 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode
[2018-12-08 07:54:31,773 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2018-12-08 07:54:31,774 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2018-12-08 07:54:31,774 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP
[2018-12-08 07:54:31,774 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2018-12-08 07:54:31,774 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL
[2018-12-08 07:54:31,774 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode
[2018-12-08 07:54:31,774 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2018-12-08 07:54:31,774 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/working_dir_a72b2d65-e2b1-46d2-8035-0e5289f9a905/bin-2019/uautomizer
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) )
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7e40a98558d0111ea95f3ee60a44cc14c7768182
[2018-12-08 07:54:31,790 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp
[2018-12-08 07:54:31,797 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2018-12-08 07:54:31,799 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2018-12-08 07:54:31,799 INFO L271 PluginConnector]: Initializing CDTParser...
[2018-12-08 07:54:31,800 INFO L276 PluginConnector]: CDTParser initialized
[2018-12-08 07:54:31,800 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_a72b2d65-e2b1-46d2-8035-0e5289f9a905/bin-2019/uautomizer/../../sv-benchmarks/c/recursive/Fibonacci02_true-unreach-call_true-no-overflow_true-termination.c
[2018-12-08 07:54:31,835 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_a72b2d65-e2b1-46d2-8035-0e5289f9a905/bin-2019/uautomizer/data/9a8fb84b7/9b1e0615ab274723b025dacd1c4f5754/FLAGaffdc68f0
[2018-12-08 07:54:32,206 INFO L307 CDTParser]: Found 1 translation units.
[2018-12-08 07:54:32,206 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_a72b2d65-e2b1-46d2-8035-0e5289f9a905/sv-benchmarks/c/recursive/Fibonacci02_true-unreach-call_true-no-overflow_true-termination.c
[2018-12-08 07:54:32,210 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_a72b2d65-e2b1-46d2-8035-0e5289f9a905/bin-2019/uautomizer/data/9a8fb84b7/9b1e0615ab274723b025dacd1c4f5754/FLAGaffdc68f0
[2018-12-08 07:54:32,218 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_a72b2d65-e2b1-46d2-8035-0e5289f9a905/bin-2019/uautomizer/data/9a8fb84b7/9b1e0615ab274723b025dacd1c4f5754
[2018-12-08 07:54:32,219 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2018-12-08 07:54:32,220 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements.
[2018-12-08 07:54:32,221 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2018-12-08 07:54:32,221 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator...
[2018-12-08 07:54:32,223 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized
[2018-12-08 07:54:32,223 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.12 07:54:32" (1/1) ...
[2018-12-08 07:54:32,225 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6ba821c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 07:54:32, skipping insertion in model container
[2018-12-08 07:54:32,225 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.12 07:54:32" (1/1) ...
[2018-12-08 07:54:32,230 INFO L145 MainTranslator]: Starting translation in SV-COMP mode
[2018-12-08 07:54:32,238 INFO L176 MainTranslator]: Built tables and reachable declarations
[2018-12-08 07:54:32,319 INFO L203 PostProcessor]: Analyzing one entry point: main
[2018-12-08 07:54:32,322 INFO L191 MainTranslator]: Completed pre-run
[2018-12-08 07:54:32,330 INFO L203 PostProcessor]: Analyzing one entry point: main
[2018-12-08 07:54:32,338 INFO L195 MainTranslator]: Completed translation
[2018-12-08 07:54:32,338 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 07:54:32 WrapperNode
[2018-12-08 07:54:32,338 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2018-12-08 07:54:32,339 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2018-12-08 07:54:32,339 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner...
[2018-12-08 07:54:32,339 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized
[2018-12-08 07:54:32,344 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 07:54:32" (1/1) ...
[2018-12-08 07:54:32,346 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 07:54:32" (1/1) ...
[2018-12-08 07:54:32,350 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2018-12-08 07:54:32,350 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2018-12-08 07:54:32,350 INFO L271 PluginConnector]: Initializing Boogie Preprocessor...
[2018-12-08 07:54:32,350 INFO L276 PluginConnector]: Boogie Preprocessor initialized
[2018-12-08 07:54:32,356 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 07:54:32" (1/1) ...
[2018-12-08 07:54:32,356 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 07:54:32" (1/1) ...
[2018-12-08 07:54:32,356 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 07:54:32" (1/1) ...
[2018-12-08 07:54:32,356 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 07:54:32" (1/1) ...
[2018-12-08 07:54:32,358 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 07:54:32" (1/1) ...
[2018-12-08 07:54:32,359 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 07:54:32" (1/1) ...
[2018-12-08 07:54:32,359 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 07:54:32" (1/1) ...
[2018-12-08 07:54:32,360 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2018-12-08 07:54:32,360 INFO L113 PluginConnector]: ------------------------RCFGBuilder----------------------------
[2018-12-08 07:54:32,360 INFO L271 PluginConnector]: Initializing RCFGBuilder...
[2018-12-08 07:54:32,361 INFO L276 PluginConnector]: RCFGBuilder initialized
[2018-12-08 07:54:32,361 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 07:54:32" (1/1) ...
No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a72b2d65-e2b1-46d2-8035-0e5289f9a905/bin-2019/uautomizer/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
[2018-12-08 07:54:32,421 INFO L130 BoogieDeclarations]: Found specification of procedure fibonacci
[2018-12-08 07:54:32,422 INFO L138 BoogieDeclarations]: Found implementation of procedure fibonacci
[2018-12-08 07:54:32,422 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2018-12-08 07:54:32,422 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2018-12-08 07:54:32,422 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2018-12-08 07:54:32,422 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2018-12-08 07:54:32,422 INFO L130 BoogieDeclarations]: Found specification of procedure main
[2018-12-08 07:54:32,422 INFO L138 BoogieDeclarations]: Found implementation of procedure main
[2018-12-08 07:54:32,511 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2018-12-08 07:54:32,511 INFO L280 CfgBuilder]: Removed 0 assue(true) statements.
[2018-12-08 07:54:32,511 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.12 07:54:32 BoogieIcfgContainer
[2018-12-08 07:54:32,511 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2018-12-08 07:54:32,512 INFO L113 PluginConnector]: ------------------------TraceAbstraction----------------------------
[2018-12-08 07:54:32,512 INFO L271 PluginConnector]: Initializing TraceAbstraction...
[2018-12-08 07:54:32,514 INFO L276 PluginConnector]: TraceAbstraction initialized
[2018-12-08 07:54:32,514 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.12 07:54:32" (1/3) ...
[2018-12-08 07:54:32,515 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13a116b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.12 07:54:32, skipping insertion in model container
[2018-12-08 07:54:32,515 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 07:54:32" (2/3) ...
[2018-12-08 07:54:32,515 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13a116b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.12 07:54:32, skipping insertion in model container
[2018-12-08 07:54:32,515 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.12 07:54:32" (3/3) ...
[2018-12-08 07:54:32,516 INFO L112 eAbstractionObserver]: Analyzing ICFG Fibonacci02_true-unreach-call_true-no-overflow_true-termination.c
[2018-12-08 07:54:32,522 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2018-12-08 07:54:32,527 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2018-12-08 07:54:32,536 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2018-12-08 07:54:32,556 INFO L133 ementStrategyFactory]: Using default assertion order modulation
[2018-12-08 07:54:32,557 INFO L382 AbstractCegarLoop]: Interprodecural is true
[2018-12-08 07:54:32,557 INFO L383 AbstractCegarLoop]: Hoare is true
[2018-12-08 07:54:32,557 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP
[2018-12-08 07:54:32,557 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2018-12-08 07:54:32,557 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2018-12-08 07:54:32,557 INFO L387 AbstractCegarLoop]: Difference is false
[2018-12-08 07:54:32,557 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2018-12-08 07:54:32,557 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2018-12-08 07:54:32,568 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states.
[2018-12-08 07:54:32,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14
[2018-12-08 07:54:32,573 INFO L394 BasicCegarLoop]: Found error trace
[2018-12-08 07:54:32,573 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2018-12-08 07:54:32,575 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2018-12-08 07:54:32,580 INFO L141 PredicateUnifier]: Initialized classic predicate unifier
[2018-12-08 07:54:32,580 INFO L82 PathProgramCache]: Analyzing trace with hash -1356498376, now seen corresponding path program 1 times
[2018-12-08 07:54:32,581 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-12-08 07:54:32,581 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-12-08 07:54:32,611 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-12-08 07:54:32,611 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2018-12-08 07:54:32,611 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-12-08 07:54:32,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-12-08 07:54:32,689 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-12-08 07:54:32,690 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2018-12-08 07:54:32,691 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2018-12-08 07:54:32,693 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states
[2018-12-08 07:54:32,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2018-12-08 07:54:32,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2018-12-08 07:54:32,702 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 5 states.
[2018-12-08 07:54:32,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-12-08 07:54:32,759 INFO L93 Difference]: Finished difference Result 33 states and 39 transitions.
[2018-12-08 07:54:32,759 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states.
[2018-12-08 07:54:32,760 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13
[2018-12-08 07:54:32,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2018-12-08 07:54:32,766 INFO L225 Difference]: With dead ends: 33
[2018-12-08 07:54:32,766 INFO L226 Difference]: Without dead ends: 21
[2018-12-08 07:54:32,768 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30
[2018-12-08 07:54:32,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states.
[2018-12-08 07:54:32,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21.
[2018-12-08 07:54:32,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states.
[2018-12-08 07:54:32,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions.
[2018-12-08 07:54:32,792 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 13
[2018-12-08 07:54:32,792 INFO L84 Accepts]: Finished accepts. word is rejected.
[2018-12-08 07:54:32,792 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions.
[2018-12-08 07:54:32,792 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states.
[2018-12-08 07:54:32,792 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions.
[2018-12-08 07:54:32,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15
[2018-12-08 07:54:32,793 INFO L394 BasicCegarLoop]: Found error trace
[2018-12-08 07:54:32,793 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2018-12-08 07:54:32,793 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2018-12-08 07:54:32,794 INFO L141 PredicateUnifier]: Initialized classic predicate unifier
[2018-12-08 07:54:32,794 INFO L82 PathProgramCache]: Analyzing trace with hash 1591396412, now seen corresponding path program 1 times
[2018-12-08 07:54:32,794 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-12-08 07:54:32,794 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-12-08 07:54:32,794 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-12-08 07:54:32,794 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2018-12-08 07:54:32,795 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-12-08 07:54:32,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-12-08 07:54:32,823 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-12-08 07:54:32,823 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2018-12-08 07:54:32,823 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2018-12-08 07:54:32,824 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states
[2018-12-08 07:54:32,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2018-12-08 07:54:32,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2018-12-08 07:54:32,824 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 5 states.
[2018-12-08 07:54:32,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-12-08 07:54:32,858 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions.
[2018-12-08 07:54:32,858 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states.
[2018-12-08 07:54:32,858 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14
[2018-12-08 07:54:32,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2018-12-08 07:54:32,859 INFO L225 Difference]: With dead ends: 27
[2018-12-08 07:54:32,859 INFO L226 Difference]: Without dead ends: 23
[2018-12-08 07:54:32,859 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30
[2018-12-08 07:54:32,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states.
[2018-12-08 07:54:32,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21.
[2018-12-08 07:54:32,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states.
[2018-12-08 07:54:32,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions.
[2018-12-08 07:54:32,863 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 14
[2018-12-08 07:54:32,863 INFO L84 Accepts]: Finished accepts. word is rejected.
[2018-12-08 07:54:32,863 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions.
[2018-12-08 07:54:32,863 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states.
[2018-12-08 07:54:32,863 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions.
[2018-12-08 07:54:32,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27
[2018-12-08 07:54:32,864 INFO L394 BasicCegarLoop]: Found error trace
[2018-12-08 07:54:32,864 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2018-12-08 07:54:32,864 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2018-12-08 07:54:32,864 INFO L141 PredicateUnifier]: Initialized classic predicate unifier
[2018-12-08 07:54:32,864 INFO L82 PathProgramCache]: Analyzing trace with hash -1761048597, now seen corresponding path program 1 times
[2018-12-08 07:54:32,864 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-12-08 07:54:32,864 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-12-08 07:54:32,865 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-12-08 07:54:32,865 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2018-12-08 07:54:32,865 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-12-08 07:54:32,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-12-08 07:54:32,908 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked.
[2018-12-08 07:54:32,908 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-12-08 07:54:32,908 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a72b2d65-e2b1-46d2-8035-0e5289f9a905/bin-2019/uautomizer/z3
Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-12-08 07:54:32,914 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2018-12-08 07:54:32,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-12-08 07:54:32,929 INFO L273 TraceCheckSpWp]: Computing forward predicates...
[2018-12-08 07:54:32,965 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked.
[2018-12-08 07:54:32,982 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-12-08 07:54:32,982 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8
[2018-12-08 07:54:32,982 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states
[2018-12-08 07:54:32,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2018-12-08 07:54:32,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56
[2018-12-08 07:54:32,983 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 8 states.
[2018-12-08 07:54:33,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-12-08 07:54:33,051 INFO L93 Difference]: Finished difference Result 38 states and 49 transitions.
[2018-12-08 07:54:33,051 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states.
[2018-12-08 07:54:33,051 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 26
[2018-12-08 07:54:33,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2018-12-08 07:54:33,052 INFO L225 Difference]: With dead ends: 38
[2018-12-08 07:54:33,052 INFO L226 Difference]: Without dead ends: 23
[2018-12-08 07:54:33,052 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132
[2018-12-08 07:54:33,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states.
[2018-12-08 07:54:33,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23.
[2018-12-08 07:54:33,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states.
[2018-12-08 07:54:33,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions.
[2018-12-08 07:54:33,056 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 26
[2018-12-08 07:54:33,056 INFO L84 Accepts]: Finished accepts. word is rejected.
[2018-12-08 07:54:33,056 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions.
[2018-12-08 07:54:33,056 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states.
[2018-12-08 07:54:33,056 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions.
[2018-12-08 07:54:33,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28
[2018-12-08 07:54:33,057 INFO L394 BasicCegarLoop]: Found error trace
[2018-12-08 07:54:33,057 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2018-12-08 07:54:33,057 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2018-12-08 07:54:33,057 INFO L141 PredicateUnifier]: Initialized classic predicate unifier
[2018-12-08 07:54:33,057 INFO L82 PathProgramCache]: Analyzing trace with hash -624449707, now seen corresponding path program 1 times
[2018-12-08 07:54:33,057 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-12-08 07:54:33,057 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-12-08 07:54:33,058 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-12-08 07:54:33,058 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2018-12-08 07:54:33,058 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-12-08 07:54:33,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-12-08 07:54:33,085 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked.
[2018-12-08 07:54:33,085 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-12-08 07:54:33,085 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a72b2d65-e2b1-46d2-8035-0e5289f9a905/bin-2019/uautomizer/z3
Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-12-08 07:54:33,091 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2018-12-08 07:54:33,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-12-08 07:54:33,098 INFO L273 TraceCheckSpWp]: Computing forward predicates...
[2018-12-08 07:54:33,103 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked.
[2018-12-08 07:54:33,118 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-12-08 07:54:33,118 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6
[2018-12-08 07:54:33,118 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states
[2018-12-08 07:54:33,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2018-12-08 07:54:33,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30
[2018-12-08 07:54:33,119 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 6 states.
[2018-12-08 07:54:33,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-12-08 07:54:33,156 INFO L93 Difference]: Finished difference Result 32 states and 41 transitions.
[2018-12-08 07:54:33,157 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states.
[2018-12-08 07:54:33,157 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27
[2018-12-08 07:54:33,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2018-12-08 07:54:33,157 INFO L225 Difference]: With dead ends: 32
[2018-12-08 07:54:33,158 INFO L226 Difference]: Without dead ends: 28
[2018-12-08 07:54:33,158 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56
[2018-12-08 07:54:33,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states.
[2018-12-08 07:54:33,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28.
[2018-12-08 07:54:33,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states.
[2018-12-08 07:54:33,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 37 transitions.
[2018-12-08 07:54:33,162 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 37 transitions. Word has length 27
[2018-12-08 07:54:33,162 INFO L84 Accepts]: Finished accepts. word is rejected.
[2018-12-08 07:54:33,162 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 37 transitions.
[2018-12-08 07:54:33,162 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states.
[2018-12-08 07:54:33,162 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 37 transitions.
[2018-12-08 07:54:33,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41
[2018-12-08 07:54:33,163 INFO L394 BasicCegarLoop]: Found error trace
[2018-12-08 07:54:33,163 INFO L402 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2018-12-08 07:54:33,163 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2018-12-08 07:54:33,163 INFO L141 PredicateUnifier]: Initialized classic predicate unifier
[2018-12-08 07:54:33,163 INFO L82 PathProgramCache]: Analyzing trace with hash -111055954, now seen corresponding path program 2 times
[2018-12-08 07:54:33,164 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-12-08 07:54:33,164 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-12-08 07:54:33,164 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-12-08 07:54:33,164 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2018-12-08 07:54:33,165 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-12-08 07:54:33,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-12-08 07:54:33,206 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 18 proven. 8 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked.
[2018-12-08 07:54:33,206 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-12-08 07:54:33,206 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a72b2d65-e2b1-46d2-8035-0e5289f9a905/bin-2019/uautomizer/z3
Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-12-08 07:54:33,212 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1
[2018-12-08 07:54:33,222 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2018-12-08 07:54:33,222 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat
[2018-12-08 07:54:33,223 INFO L273 TraceCheckSpWp]: Computing forward predicates...
[2018-12-08 07:54:33,243 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked.
[2018-12-08 07:54:33,258 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-12-08 07:54:33,258 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 8
[2018-12-08 07:54:33,258 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states
[2018-12-08 07:54:33,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2018-12-08 07:54:33,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56
[2018-12-08 07:54:33,259 INFO L87 Difference]: Start difference. First operand 28 states and 37 transitions. Second operand 8 states.
[2018-12-08 07:54:33,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-12-08 07:54:33,332 INFO L93 Difference]: Finished difference Result 40 states and 60 transitions.
[2018-12-08 07:54:33,332 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states.
[2018-12-08 07:54:33,332 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 40
[2018-12-08 07:54:33,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2018-12-08 07:54:33,334 INFO L225 Difference]: With dead ends: 40
[2018-12-08 07:54:33,334 INFO L226 Difference]: Without dead ends: 36
[2018-12-08 07:54:33,335 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132
[2018-12-08 07:54:33,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states.
[2018-12-08 07:54:33,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33.
[2018-12-08 07:54:33,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states.
[2018-12-08 07:54:33,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 49 transitions.
[2018-12-08 07:54:33,340 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 49 transitions. Word has length 40
[2018-12-08 07:54:33,340 INFO L84 Accepts]: Finished accepts. word is rejected.
[2018-12-08 07:54:33,340 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 49 transitions.
[2018-12-08 07:54:33,340 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states.
[2018-12-08 07:54:33,340 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 49 transitions.
[2018-12-08 07:54:33,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82
[2018-12-08 07:54:33,341 INFO L394 BasicCegarLoop]: Found error trace
[2018-12-08 07:54:33,341 INFO L402 BasicCegarLoop]: trace histogram [11, 11, 8, 5, 5, 5, 5, 5, 5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2018-12-08 07:54:33,342 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2018-12-08 07:54:33,342 INFO L141 PredicateUnifier]: Initialized classic predicate unifier
[2018-12-08 07:54:33,342 INFO L82 PathProgramCache]: Analyzing trace with hash 696026233, now seen corresponding path program 3 times
[2018-12-08 07:54:33,342 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-12-08 07:54:33,342 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-12-08 07:54:33,342 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-12-08 07:54:33,343 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2018-12-08 07:54:33,343 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-12-08 07:54:33,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-12-08 07:54:33,439 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 110 proven. 8 refuted. 0 times theorem prover too weak. 170 trivial. 0 not checked.
[2018-12-08 07:54:33,439 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-12-08 07:54:33,439 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a72b2d65-e2b1-46d2-8035-0e5289f9a905/bin-2019/uautomizer/z3
Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-12-08 07:54:33,447 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2
[2018-12-08 07:54:33,461 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s)
[2018-12-08 07:54:33,461 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat
[2018-12-08 07:54:33,464 INFO L273 TraceCheckSpWp]: Computing forward predicates...
[2018-12-08 07:54:33,490 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 130 proven. 12 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked.
[2018-12-08 07:54:33,504 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-12-08 07:54:33,504 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11
[2018-12-08 07:54:33,505 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states
[2018-12-08 07:54:33,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants.
[2018-12-08 07:54:33,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110
[2018-12-08 07:54:33,505 INFO L87 Difference]: Start difference. First operand 33 states and 49 transitions. Second operand 11 states.
[2018-12-08 07:54:33,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-12-08 07:54:33,614 INFO L93 Difference]: Finished difference Result 65 states and 113 transitions.
[2018-12-08 07:54:33,614 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states.
[2018-12-08 07:54:33,614 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 81
[2018-12-08 07:54:33,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2018-12-08 07:54:33,615 INFO L225 Difference]: With dead ends: 65
[2018-12-08 07:54:33,615 INFO L226 Difference]: Without dead ends: 38
[2018-12-08 07:54:33,616 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240
[2018-12-08 07:54:33,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states.
[2018-12-08 07:54:33,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 35.
[2018-12-08 07:54:33,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states.
[2018-12-08 07:54:33,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 49 transitions.
[2018-12-08 07:54:33,620 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 49 transitions. Word has length 81
[2018-12-08 07:54:33,620 INFO L84 Accepts]: Finished accepts. word is rejected.
[2018-12-08 07:54:33,621 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 49 transitions.
[2018-12-08 07:54:33,621 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states.
[2018-12-08 07:54:33,621 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 49 transitions.
[2018-12-08 07:54:33,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97
[2018-12-08 07:54:33,622 INFO L394 BasicCegarLoop]: Found error trace
[2018-12-08 07:54:33,622 INFO L402 BasicCegarLoop]: trace histogram [13, 13, 11, 6, 6, 6, 6, 6, 6, 6, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2018-12-08 07:54:33,622 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2018-12-08 07:54:33,622 INFO L141 PredicateUnifier]: Initialized classic predicate unifier
[2018-12-08 07:54:33,622 INFO L82 PathProgramCache]: Analyzing trace with hash -987229488, now seen corresponding path program 4 times
[2018-12-08 07:54:33,622 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-12-08 07:54:33,622 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-12-08 07:54:33,623 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-12-08 07:54:33,623 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2018-12-08 07:54:33,623 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-12-08 07:54:33,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-12-08 07:54:33,728 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 176 proven. 28 refuted. 0 times theorem prover too weak. 223 trivial. 0 not checked.
[2018-12-08 07:54:33,728 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-12-08 07:54:33,728 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a72b2d65-e2b1-46d2-8035-0e5289f9a905/bin-2019/uautomizer/z3
Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-12-08 07:54:33,734 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST
[2018-12-08 07:54:33,747 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s)
[2018-12-08 07:54:33,747 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat
[2018-12-08 07:54:33,749 INFO L273 TraceCheckSpWp]: Computing forward predicates...
[2018-12-08 07:54:33,792 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 27 proven. 166 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked.
[2018-12-08 07:54:33,806 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-12-08 07:54:33,806 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 15
[2018-12-08 07:54:33,806 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states
[2018-12-08 07:54:33,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants.
[2018-12-08 07:54:33,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210
[2018-12-08 07:54:33,807 INFO L87 Difference]: Start difference. First operand 35 states and 49 transitions. Second operand 15 states.
[2018-12-08 07:54:34,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-12-08 07:54:34,060 INFO L93 Difference]: Finished difference Result 83 states and 141 transitions.
[2018-12-08 07:54:34,060 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states.
[2018-12-08 07:54:34,060 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 96
[2018-12-08 07:54:34,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2018-12-08 07:54:34,061 INFO L225 Difference]: With dead ends: 83
[2018-12-08 07:54:34,061 INFO L226 Difference]: Without dead ends: 54
[2018-12-08 07:54:34,062 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=163, Invalid=487, Unknown=0, NotChecked=0, Total=650
[2018-12-08 07:54:34,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states.
[2018-12-08 07:54:34,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54.
[2018-12-08 07:54:34,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states.
[2018-12-08 07:54:34,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 65 transitions.
[2018-12-08 07:54:34,066 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 65 transitions. Word has length 96
[2018-12-08 07:54:34,067 INFO L84 Accepts]: Finished accepts. word is rejected.
[2018-12-08 07:54:34,067 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 65 transitions.
[2018-12-08 07:54:34,067 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states.
[2018-12-08 07:54:34,067 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 65 transitions.
[2018-12-08 07:54:34,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110
[2018-12-08 07:54:34,068 INFO L394 BasicCegarLoop]: Found error trace
[2018-12-08 07:54:34,068 INFO L402 BasicCegarLoop]: trace histogram [15, 15, 12, 7, 7, 7, 7, 7, 7, 7, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2018-12-08 07:54:34,068 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2018-12-08 07:54:34,068 INFO L141 PredicateUnifier]: Initialized classic predicate unifier
[2018-12-08 07:54:34,068 INFO L82 PathProgramCache]: Analyzing trace with hash 580129251, now seen corresponding path program 5 times
[2018-12-08 07:54:34,068 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-12-08 07:54:34,068 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-12-08 07:54:34,069 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-12-08 07:54:34,069 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2018-12-08 07:54:34,069 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-12-08 07:54:34,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-12-08 07:54:34,129 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 174 proven. 59 refuted. 0 times theorem prover too weak. 337 trivial. 0 not checked.
[2018-12-08 07:54:34,129 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-12-08 07:54:34,129 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a72b2d65-e2b1-46d2-8035-0e5289f9a905/bin-2019/uautomizer/z3
Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-12-08 07:54:34,135 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1
[2018-12-08 07:54:34,159 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s)
[2018-12-08 07:54:34,159 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat
[2018-12-08 07:54:34,162 INFO L273 TraceCheckSpWp]: Computing forward predicates...
[2018-12-08 07:54:34,189 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 42 proven. 229 refuted. 0 times theorem prover too weak. 299 trivial. 0 not checked.
[2018-12-08 07:54:34,203 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-12-08 07:54:34,203 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 9
[2018-12-08 07:54:34,203 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states
[2018-12-08 07:54:34,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants.
[2018-12-08 07:54:34,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72
[2018-12-08 07:54:34,204 INFO L87 Difference]: Start difference. First operand 54 states and 65 transitions. Second operand 9 states.
[2018-12-08 07:54:34,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-12-08 07:54:34,271 INFO L93 Difference]: Finished difference Result 63 states and 81 transitions.
[2018-12-08 07:54:34,271 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states.
[2018-12-08 07:54:34,271 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 109
[2018-12-08 07:54:34,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2018-12-08 07:54:34,272 INFO L225 Difference]: With dead ends: 63
[2018-12-08 07:54:34,272 INFO L226 Difference]: Without dead ends: 59
[2018-12-08 07:54:34,272 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182
[2018-12-08 07:54:34,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states.
[2018-12-08 07:54:34,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59.
[2018-12-08 07:54:34,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states.
[2018-12-08 07:54:34,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 76 transitions.
[2018-12-08 07:54:34,277 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 76 transitions. Word has length 109
[2018-12-08 07:54:34,277 INFO L84 Accepts]: Finished accepts. word is rejected.
[2018-12-08 07:54:34,277 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 76 transitions.
[2018-12-08 07:54:34,277 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states.
[2018-12-08 07:54:34,277 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 76 transitions.
[2018-12-08 07:54:34,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205
[2018-12-08 07:54:34,279 INFO L394 BasicCegarLoop]: Found error trace
[2018-12-08 07:54:34,279 INFO L402 BasicCegarLoop]: trace histogram [29, 29, 23, 14, 14, 14, 14, 14, 14, 14, 9, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2018-12-08 07:54:34,279 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2018-12-08 07:54:34,279 INFO L141 PredicateUnifier]: Initialized classic predicate unifier
[2018-12-08 07:54:34,279 INFO L82 PathProgramCache]: Analyzing trace with hash -1510121204, now seen corresponding path program 6 times
[2018-12-08 07:54:34,279 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-12-08 07:54:34,279 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-12-08 07:54:34,280 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-12-08 07:54:34,280 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2018-12-08 07:54:34,280 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-12-08 07:54:34,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-12-08 07:54:34,388 INFO L134 CoverageAnalysis]: Checked inductivity of 2241 backedges. 403 proven. 124 refuted. 0 times theorem prover too weak. 1714 trivial. 0 not checked.
[2018-12-08 07:54:34,389 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-12-08 07:54:34,389 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a72b2d65-e2b1-46d2-8035-0e5289f9a905/bin-2019/uautomizer/z3
Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-12-08 07:54:34,394 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE
[2018-12-08 07:54:34,426 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s)
[2018-12-08 07:54:34,426 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat
[2018-12-08 07:54:34,429 INFO L273 TraceCheckSpWp]: Computing forward predicates...
[2018-12-08 07:54:34,454 INFO L134 CoverageAnalysis]: Checked inductivity of 2241 backedges. 433 proven. 94 refuted. 0 times theorem prover too weak. 1714 trivial. 0 not checked.
[2018-12-08 07:54:34,468 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-12-08 07:54:34,468 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9
[2018-12-08 07:54:34,469 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states
[2018-12-08 07:54:34,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants.
[2018-12-08 07:54:34,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72
[2018-12-08 07:54:34,469 INFO L87 Difference]: Start difference. First operand 59 states and 76 transitions. Second operand 9 states.
[2018-12-08 07:54:34,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-12-08 07:54:34,542 INFO L93 Difference]: Finished difference Result 66 states and 86 transitions.
[2018-12-08 07:54:34,542 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states.
[2018-12-08 07:54:34,542 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 204
[2018-12-08 07:54:34,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2018-12-08 07:54:34,543 INFO L225 Difference]: With dead ends: 66
[2018-12-08 07:54:34,543 INFO L226 Difference]: Without dead ends: 62
[2018-12-08 07:54:34,544 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 207 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182
[2018-12-08 07:54:34,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states.
[2018-12-08 07:54:34,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 59.
[2018-12-08 07:54:34,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states.
[2018-12-08 07:54:34,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 76 transitions.
[2018-12-08 07:54:34,549 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 76 transitions. Word has length 204
[2018-12-08 07:54:34,549 INFO L84 Accepts]: Finished accepts. word is rejected.
[2018-12-08 07:54:34,549 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 76 transitions.
[2018-12-08 07:54:34,549 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states.
[2018-12-08 07:54:34,550 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 76 transitions.
[2018-12-08 07:54:34,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219
[2018-12-08 07:54:34,551 INFO L394 BasicCegarLoop]: Found error trace
[2018-12-08 07:54:34,552 INFO L402 BasicCegarLoop]: trace histogram [31, 31, 25, 15, 15, 15, 15, 15, 15, 15, 10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2018-12-08 07:54:34,552 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2018-12-08 07:54:34,552 INFO L141 PredicateUnifier]: Initialized classic predicate unifier
[2018-12-08 07:54:34,552 INFO L82 PathProgramCache]: Analyzing trace with hash -1009195755, now seen corresponding path program 7 times
[2018-12-08 07:54:34,552 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-12-08 07:54:34,552 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-12-08 07:54:34,553 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-12-08 07:54:34,553 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2018-12-08 07:54:34,554 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-12-08 07:54:34,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-12-08 07:54:34,622 INFO L134 CoverageAnalysis]: Checked inductivity of 2580 backedges. 137 proven. 567 refuted. 0 times theorem prover too weak. 1876 trivial. 0 not checked.
[2018-12-08 07:54:34,623 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-12-08 07:54:34,623 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a72b2d65-e2b1-46d2-8035-0e5289f9a905/bin-2019/uautomizer/z3
Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-12-08 07:54:34,629 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2018-12-08 07:54:34,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-12-08 07:54:34,668 INFO L273 TraceCheckSpWp]: Computing forward predicates...
[2018-12-08 07:54:34,724 INFO L134 CoverageAnalysis]: Checked inductivity of 2580 backedges. 108 proven. 716 refuted. 0 times theorem prover too weak. 1756 trivial. 0 not checked.
[2018-12-08 07:54:34,740 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-12-08 07:54:34,741 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 10
[2018-12-08 07:54:34,741 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states
[2018-12-08 07:54:34,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants.
[2018-12-08 07:54:34,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90
[2018-12-08 07:54:34,741 INFO L87 Difference]: Start difference. First operand 59 states and 76 transitions. Second operand 10 states.
[2018-12-08 07:54:34,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-12-08 07:54:34,860 INFO L93 Difference]: Finished difference Result 71 states and 101 transitions.
[2018-12-08 07:54:34,861 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states.
[2018-12-08 07:54:34,861 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 218
[2018-12-08 07:54:34,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2018-12-08 07:54:34,862 INFO L225 Difference]: With dead ends: 71
[2018-12-08 07:54:34,862 INFO L226 Difference]: Without dead ends: 67
[2018-12-08 07:54:34,862 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240
[2018-12-08 07:54:34,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states.
[2018-12-08 07:54:34,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 64.
[2018-12-08 07:54:34,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states.
[2018-12-08 07:54:34,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 89 transitions.
[2018-12-08 07:54:34,868 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 89 transitions. Word has length 218
[2018-12-08 07:54:34,868 INFO L84 Accepts]: Finished accepts. word is rejected.
[2018-12-08 07:54:34,868 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 89 transitions.
[2018-12-08 07:54:34,869 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states.
[2018-12-08 07:54:34,869 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 89 transitions.
[2018-12-08 07:54:34,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328
[2018-12-08 07:54:34,871 INFO L394 BasicCegarLoop]: Found error trace
[2018-12-08 07:54:34,872 INFO L402 BasicCegarLoop]: trace histogram [47, 47, 38, 23, 23, 23, 23, 23, 23, 23, 15, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2018-12-08 07:54:34,872 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2018-12-08 07:54:34,872 INFO L141 PredicateUnifier]: Initialized classic predicate unifier
[2018-12-08 07:54:34,872 INFO L82 PathProgramCache]: Analyzing trace with hash 1795105459, now seen corresponding path program 8 times
[2018-12-08 07:54:34,872 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-12-08 07:54:34,873 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-12-08 07:54:34,873 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-12-08 07:54:34,873 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2018-12-08 07:54:34,873 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-12-08 07:54:34,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-12-08 07:54:35,002 INFO L134 CoverageAnalysis]: Checked inductivity of 6039 backedges. 238 proven. 1112 refuted. 0 times theorem prover too weak. 4689 trivial. 0 not checked.
[2018-12-08 07:54:35,003 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-12-08 07:54:35,003 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a72b2d65-e2b1-46d2-8035-0e5289f9a905/bin-2019/uautomizer/z3
Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-12-08 07:54:35,009 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1
[2018-12-08 07:54:35,059 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2018-12-08 07:54:35,059 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat
[2018-12-08 07:54:35,063 INFO L273 TraceCheckSpWp]: Computing forward predicates...
[2018-12-08 07:54:35,111 INFO L134 CoverageAnalysis]: Checked inductivity of 6039 backedges. 204 proven. 1348 refuted. 0 times theorem prover too weak. 4487 trivial. 0 not checked.
[2018-12-08 07:54:35,136 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-12-08 07:54:35,136 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 11
[2018-12-08 07:54:35,137 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states
[2018-12-08 07:54:35,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants.
[2018-12-08 07:54:35,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110
[2018-12-08 07:54:35,137 INFO L87 Difference]: Start difference. First operand 64 states and 89 transitions. Second operand 11 states.
[2018-12-08 07:54:35,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-12-08 07:54:35,263 INFO L93 Difference]: Finished difference Result 73 states and 109 transitions.
[2018-12-08 07:54:35,263 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states.
[2018-12-08 07:54:35,263 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 327
[2018-12-08 07:54:35,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2018-12-08 07:54:35,264 INFO L225 Difference]: With dead ends: 73
[2018-12-08 07:54:35,264 INFO L226 Difference]: Without dead ends: 69
[2018-12-08 07:54:35,265 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 348 GetRequests, 332 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306
[2018-12-08 07:54:35,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states.
[2018-12-08 07:54:35,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69.
[2018-12-08 07:54:35,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states.
[2018-12-08 07:54:35,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 104 transitions.
[2018-12-08 07:54:35,270 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 104 transitions. Word has length 327
[2018-12-08 07:54:35,270 INFO L84 Accepts]: Finished accepts. word is rejected.
[2018-12-08 07:54:35,270 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 104 transitions.
[2018-12-08 07:54:35,270 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states.
[2018-12-08 07:54:35,270 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 104 transitions.
[2018-12-08 07:54:35,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 586
[2018-12-08 07:54:35,272 INFO L394 BasicCegarLoop]: Found error trace
[2018-12-08 07:54:35,272 INFO L402 BasicCegarLoop]: trace histogram [85, 85, 68, 42, 42, 42, 42, 42, 42, 42, 26, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2018-12-08 07:54:35,272 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2018-12-08 07:54:35,272 INFO L141 PredicateUnifier]: Initialized classic predicate unifier
[2018-12-08 07:54:35,273 INFO L82 PathProgramCache]: Analyzing trace with hash 1116735592, now seen corresponding path program 9 times
[2018-12-08 07:54:35,273 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-12-08 07:54:35,273 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-12-08 07:54:35,273 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-12-08 07:54:35,273 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2018-12-08 07:54:35,273 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-12-08 07:54:35,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-12-08 07:54:35,522 INFO L134 CoverageAnalysis]: Checked inductivity of 20002 backedges. 766 proven. 2860 refuted. 0 times theorem prover too weak. 16376 trivial. 0 not checked.
[2018-12-08 07:54:35,522 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-12-08 07:54:35,522 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a72b2d65-e2b1-46d2-8035-0e5289f9a905/bin-2019/uautomizer/z3
Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-12-08 07:54:35,528 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2
[2018-12-08 07:54:35,589 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s)
[2018-12-08 07:54:35,589 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat
[2018-12-08 07:54:35,594 INFO L273 TraceCheckSpWp]: Computing forward predicates...
[2018-12-08 07:54:35,703 INFO L134 CoverageAnalysis]: Checked inductivity of 20002 backedges. 6337 proven. 191 refuted. 0 times theorem prover too weak. 13474 trivial. 0 not checked.
[2018-12-08 07:54:35,719 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-12-08 07:54:35,719 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 16
[2018-12-08 07:54:35,719 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states
[2018-12-08 07:54:35,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants.
[2018-12-08 07:54:35,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240
[2018-12-08 07:54:35,720 INFO L87 Difference]: Start difference. First operand 69 states and 104 transitions. Second operand 16 states.
[2018-12-08 07:54:35,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-12-08 07:54:35,943 INFO L93 Difference]: Finished difference Result 142 states and 250 transitions.
[2018-12-08 07:54:35,944 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states.
[2018-12-08 07:54:35,944 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 585
[2018-12-08 07:54:35,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2018-12-08 07:54:35,945 INFO L225 Difference]: With dead ends: 142
[2018-12-08 07:54:35,945 INFO L226 Difference]: Without dead ends: 83
[2018-12-08 07:54:35,946 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 617 GetRequests, 587 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=247, Invalid=745, Unknown=0, NotChecked=0, Total=992
[2018-12-08 07:54:35,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states.
[2018-12-08 07:54:35,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 76.
[2018-12-08 07:54:35,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states.
[2018-12-08 07:54:35,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 109 transitions.
[2018-12-08 07:54:35,951 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 109 transitions. Word has length 585
[2018-12-08 07:54:35,951 INFO L84 Accepts]: Finished accepts. word is rejected.
[2018-12-08 07:54:35,951 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 109 transitions.
[2018-12-08 07:54:35,951 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states.
[2018-12-08 07:54:35,952 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 109 transitions.
[2018-12-08 07:54:35,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 613
[2018-12-08 07:54:35,953 INFO L394 BasicCegarLoop]: Found error trace
[2018-12-08 07:54:35,954 INFO L402 BasicCegarLoop]: trace histogram [89, 89, 71, 44, 44, 44, 44, 44, 44, 44, 27, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2018-12-08 07:54:35,954 INFO L423 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2018-12-08 07:54:35,954 INFO L141 PredicateUnifier]: Initialized classic predicate unifier
[2018-12-08 07:54:35,954 INFO L82 PathProgramCache]: Analyzing trace with hash -648303480, now seen corresponding path program 10 times
[2018-12-08 07:54:35,954 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-12-08 07:54:35,954 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-12-08 07:54:35,954 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-12-08 07:54:35,955 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2018-12-08 07:54:35,955 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-12-08 07:54:35,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-12-08 07:54:36,213 INFO L134 CoverageAnalysis]: Checked inductivity of 21933 backedges. 1129 proven. 2170 refuted. 0 times theorem prover too weak. 18634 trivial. 0 not checked.
[2018-12-08 07:54:36,213 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-12-08 07:54:36,213 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a72b2d65-e2b1-46d2-8035-0e5289f9a905/bin-2019/uautomizer/z3
Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-12-08 07:54:36,219 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST
[2018-12-08 07:54:36,297 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s)
[2018-12-08 07:54:36,297 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat
[2018-12-08 07:54:36,306 INFO L273 TraceCheckSpWp]: Computing forward predicates...
[2018-12-08 07:54:36,506 INFO L134 CoverageAnalysis]: Checked inductivity of 21933 backedges. 493 proven. 3110 refuted. 0 times theorem prover too weak. 18330 trivial. 0 not checked.
[2018-12-08 07:54:36,532 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-12-08 07:54:36,532 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 20
[2018-12-08 07:54:36,533 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states
[2018-12-08 07:54:36,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants.
[2018-12-08 07:54:36,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380
[2018-12-08 07:54:36,533 INFO L87 Difference]: Start difference. First operand 76 states and 109 transitions. Second operand 20 states.
[2018-12-08 07:54:37,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-12-08 07:54:37,089 INFO L93 Difference]: Finished difference Result 188 states and 362 transitions.
[2018-12-08 07:54:37,089 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states.
[2018-12-08 07:54:37,089 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 612
[2018-12-08 07:54:37,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2018-12-08 07:54:37,090 INFO L225 Difference]: With dead ends: 188
[2018-12-08 07:54:37,090 INFO L226 Difference]: Without dead ends: 122
[2018-12-08 07:54:37,091 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 661 GetRequests, 608 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 702 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=676, Invalid=2294, Unknown=0, NotChecked=0, Total=2970
[2018-12-08 07:54:37,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states.
[2018-12-08 07:54:37,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 115.
[2018-12-08 07:54:37,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states.
[2018-12-08 07:54:37,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 169 transitions.
[2018-12-08 07:54:37,099 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 169 transitions. Word has length 612
[2018-12-08 07:54:37,099 INFO L84 Accepts]: Finished accepts. word is rejected.
[2018-12-08 07:54:37,099 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 169 transitions.
[2018-12-08 07:54:37,099 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states.
[2018-12-08 07:54:37,099 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 169 transitions.
[2018-12-08 07:54:37,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 859
[2018-12-08 07:54:37,105 INFO L394 BasicCegarLoop]: Found error trace
[2018-12-08 07:54:37,105 INFO L402 BasicCegarLoop]: trace histogram [125, 125, 101, 62, 62, 62, 62, 62, 62, 62, 39, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2018-12-08 07:54:37,105 INFO L423 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2018-12-08 07:54:37,106 INFO L141 PredicateUnifier]: Initialized classic predicate unifier
[2018-12-08 07:54:37,106 INFO L82 PathProgramCache]: Analyzing trace with hash -1213678472, now seen corresponding path program 11 times
[2018-12-08 07:54:37,106 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-12-08 07:54:37,106 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-12-08 07:54:37,107 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-12-08 07:54:37,107 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2018-12-08 07:54:37,107 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-12-08 07:54:37,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-12-08 07:54:37,475 INFO L134 CoverageAnalysis]: Checked inductivity of 43614 backedges. 3536 proven. 1905 refuted. 0 times theorem prover too weak. 38173 trivial. 0 not checked.
[2018-12-08 07:54:37,475 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-12-08 07:54:37,475 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a72b2d65-e2b1-46d2-8035-0e5289f9a905/bin-2019/uautomizer/z3
Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-12-08 07:54:37,481 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1
[2018-12-08 07:54:37,755 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 92 check-sat command(s)
[2018-12-08 07:54:37,755 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat
[2018-12-08 07:54:37,764 INFO L273 TraceCheckSpWp]: Computing forward predicates...
[2018-12-08 07:54:38,027 INFO L134 CoverageAnalysis]: Checked inductivity of 43614 backedges. 6279 proven. 1859 refuted. 0 times theorem prover too weak. 35476 trivial. 0 not checked.
[2018-12-08 07:54:38,051 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-12-08 07:54:38,052 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 23
[2018-12-08 07:54:38,052 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states
[2018-12-08 07:54:38,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants.
[2018-12-08 07:54:38,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506
[2018-12-08 07:54:38,053 INFO L87 Difference]: Start difference. First operand 115 states and 169 transitions. Second operand 23 states.
[2018-12-08 07:54:38,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-12-08 07:54:38,502 INFO L93 Difference]: Finished difference Result 267 states and 511 transitions.
[2018-12-08 07:54:38,502 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states.
[2018-12-08 07:54:38,502 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 858
[2018-12-08 07:54:38,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2018-12-08 07:54:38,504 INFO L225 Difference]: With dead ends: 267
[2018-12-08 07:54:38,504 INFO L226 Difference]: Without dead ends: 142
[2018-12-08 07:54:38,505 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 899 GetRequests, 857 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=408, Invalid=1484, Unknown=0, NotChecked=0, Total=1892
[2018-12-08 07:54:38,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states.
[2018-12-08 07:54:38,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 122.
[2018-12-08 07:54:38,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states.
[2018-12-08 07:54:38,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 153 transitions.
[2018-12-08 07:54:38,514 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 153 transitions. Word has length 858
[2018-12-08 07:54:38,515 INFO L84 Accepts]: Finished accepts. word is rejected.
[2018-12-08 07:54:38,516 INFO L480 AbstractCegarLoop]: Abstraction has 122 states and 153 transitions.
[2018-12-08 07:54:38,516 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states.
[2018-12-08 07:54:38,516 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 153 transitions.
[2018-12-08 07:54:38,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 750
[2018-12-08 07:54:38,519 INFO L394 BasicCegarLoop]: Found error trace
[2018-12-08 07:54:38,519 INFO L402 BasicCegarLoop]: trace histogram [109, 109, 88, 54, 54, 54, 54, 54, 54, 54, 34, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2018-12-08 07:54:38,520 INFO L423 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2018-12-08 07:54:38,520 INFO L141 PredicateUnifier]: Initialized classic predicate unifier
[2018-12-08 07:54:38,520 INFO L82 PathProgramCache]: Analyzing trace with hash 1616877860, now seen corresponding path program 12 times
[2018-12-08 07:54:38,520 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-12-08 07:54:38,520 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-12-08 07:54:38,520 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-12-08 07:54:38,520 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2018-12-08 07:54:38,520 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-12-08 07:54:38,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-12-08 07:54:39,331 INFO L134 CoverageAnalysis]: Checked inductivity of 33096 backedges. 0 proven. 10899 refuted. 0 times theorem prover too weak. 22197 trivial. 0 not checked.
[2018-12-08 07:54:39,332 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-12-08 07:54:39,332 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a72b2d65-e2b1-46d2-8035-0e5289f9a905/bin-2019/uautomizer/z3
Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-12-08 07:54:39,338 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE
[2018-12-08 07:54:39,614 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 93 check-sat command(s)
[2018-12-08 07:54:39,614 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat
[2018-12-08 07:54:39,625 INFO L273 TraceCheckSpWp]: Computing forward predicates...
[2018-12-08 07:54:40,247 INFO L134 CoverageAnalysis]: Checked inductivity of 33096 backedges. 0 proven. 10899 refuted. 0 times theorem prover too weak. 22197 trivial. 0 not checked.
[2018-12-08 07:54:40,263 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-12-08 07:54:40,263 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 36
[2018-12-08 07:54:40,263 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states
[2018-12-08 07:54:40,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants.
[2018-12-08 07:54:40,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1175, Unknown=0, NotChecked=0, Total=1260
[2018-12-08 07:54:40,264 INFO L87 Difference]: Start difference. First operand 122 states and 153 transitions. Second operand 36 states.
[2018-12-08 07:54:40,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-12-08 07:54:40,622 INFO L93 Difference]: Finished difference Result 135 states and 172 transitions.
[2018-12-08 07:54:40,623 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states.
[2018-12-08 07:54:40,623 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 749
[2018-12-08 07:54:40,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2018-12-08 07:54:40,627 INFO L225 Difference]: With dead ends: 135
[2018-12-08 07:54:40,627 INFO L226 Difference]: Without dead ends: 131
[2018-12-08 07:54:40,628 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 969 GetRequests, 880 SyntacticMatches, 55 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=85, Invalid=1175, Unknown=0, NotChecked=0, Total=1260
[2018-12-08 07:54:40,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states.
[2018-12-08 07:54:40,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 127.
[2018-12-08 07:54:40,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states.
[2018-12-08 07:54:40,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 160 transitions.
[2018-12-08 07:54:40,641 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 160 transitions. Word has length 749
[2018-12-08 07:54:40,642 INFO L84 Accepts]: Finished accepts. word is rejected.
[2018-12-08 07:54:40,642 INFO L480 AbstractCegarLoop]: Abstraction has 127 states and 160 transitions.
[2018-12-08 07:54:40,643 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states.
[2018-12-08 07:54:40,643 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 160 transitions.
[2018-12-08 07:54:40,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1036
[2018-12-08 07:54:40,657 INFO L394 BasicCegarLoop]: Found error trace
[2018-12-08 07:54:40,657 INFO L402 BasicCegarLoop]: trace histogram [151, 151, 122, 75, 75, 75, 75, 75, 75, 75, 47, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2018-12-08 07:54:40,658 INFO L423 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2018-12-08 07:54:40,658 INFO L141 PredicateUnifier]: Initialized classic predicate unifier
[2018-12-08 07:54:40,658 INFO L82 PathProgramCache]: Analyzing trace with hash -1935693673, now seen corresponding path program 13 times
[2018-12-08 07:54:40,658 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-12-08 07:54:40,659 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-12-08 07:54:40,659 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-12-08 07:54:40,659 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2018-12-08 07:54:40,660 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-12-08 07:54:40,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-12-08 07:54:41,090 INFO L134 CoverageAnalysis]: Checked inductivity of 63781 backedges. 1289 proven. 6142 refuted. 0 times theorem prover too weak. 56350 trivial. 0 not checked.
[2018-12-08 07:54:41,090 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-12-08 07:54:41,090 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a72b2d65-e2b1-46d2-8035-0e5289f9a905/bin-2019/uautomizer/z3
Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-12-08 07:54:41,096 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2018-12-08 07:54:41,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-12-08 07:54:41,237 INFO L273 TraceCheckSpWp]: Computing forward predicates...
[2018-12-08 07:54:41,544 INFO L134 CoverageAnalysis]: Checked inductivity of 63781 backedges. 1305 proven. 6118 refuted. 0 times theorem prover too weak. 56358 trivial. 0 not checked.
[2018-12-08 07:54:41,560 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-12-08 07:54:41,560 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 17
[2018-12-08 07:54:41,560 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states
[2018-12-08 07:54:41,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants.
[2018-12-08 07:54:41,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272
[2018-12-08 07:54:41,561 INFO L87 Difference]: Start difference. First operand 127 states and 160 transitions. Second operand 17 states.
[2018-12-08 07:54:41,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-12-08 07:54:41,652 INFO L93 Difference]: Finished difference Result 130 states and 165 transitions.
[2018-12-08 07:54:41,653 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states.
[2018-12-08 07:54:41,653 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 1035
[2018-12-08 07:54:41,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2018-12-08 07:54:41,653 INFO L225 Difference]: With dead ends: 130
[2018-12-08 07:54:41,654 INFO L226 Difference]: Without dead ends: 0
[2018-12-08 07:54:41,654 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 1065 GetRequests, 1041 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=205, Invalid=395, Unknown=0, NotChecked=0, Total=600
[2018-12-08 07:54:41,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states.
[2018-12-08 07:54:41,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0.
[2018-12-08 07:54:41,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states.
[2018-12-08 07:54:41,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions.
[2018-12-08 07:54:41,655 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 1035
[2018-12-08 07:54:41,655 INFO L84 Accepts]: Finished accepts. word is rejected.
[2018-12-08 07:54:41,655 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions.
[2018-12-08 07:54:41,655 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states.
[2018-12-08 07:54:41,655 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions.
[2018-12-08 07:54:41,655 INFO L282 IsEmpty]: Finished isEmpty. No accepting run.
[2018-12-08 07:54:41,658 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.
[2018-12-08 07:54:42,296 WARN L180 SmtUtils]: Spent 428.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 77
[2018-12-08 07:54:42,297 INFO L448 ceAbstractionStarter]: For program point fibonacciFINAL(lines 14 22) no Hoare annotation was computed.
[2018-12-08 07:54:42,298 INFO L451 ceAbstractionStarter]: At program point fibonacciENTRY(lines 14 22) the Hoare annotation is: true
[2018-12-08 07:54:42,298 INFO L444 ceAbstractionStarter]: At program point L20(line 20) the Hoare annotation is: (and (<= |fibonacci_#in~n| fibonacci_~n) (<= 2 fibonacci_~n) (<= fibonacci_~n |fibonacci_#in~n|))
[2018-12-08 07:54:42,298 INFO L448 ceAbstractionStarter]: For program point L20-1(line 20) no Hoare annotation was computed.
[2018-12-08 07:54:42,298 INFO L444 ceAbstractionStarter]: At program point L20-2(line 20) the Hoare annotation is: (let ((.cse7 (<= |fibonacci_#in~n| fibonacci_~n)) (.cse6 (<= fibonacci_~n |fibonacci_#in~n|))) (let ((.cse2 (and (<= 4 |fibonacci_#in~n|) .cse7 (<= |fibonacci_#in~n| 4) .cse6)) (.cse3 (and .cse7 (<= |fibonacci_#in~n| 6) (<= 6 |fibonacci_#in~n|) .cse6)) (.cse0 (<= |fibonacci_#t~ret0| 1)) (.cse4 (<= |fibonacci_#in~n| 3)) (.cse1 (<= 1 |fibonacci_#t~ret0|)) (.cse5 (and (<= |fibonacci_#in~n| 5) (<= 5 fibonacci_~n) .cse6))) (and (or (< 2 |fibonacci_#in~n|) (and .cse0 .cse1)) (or (or (< 4 |fibonacci_#in~n|) (< |fibonacci_#in~n| 4)) (and (<= |fibonacci_#t~ret0| 2) (<= 2 |fibonacci_#t~ret0|))) (or (and (<= 13 |fibonacci_#t~ret0|) (<= |fibonacci_#in~n| 8) (<= 8 |fibonacci_#in~n|) (<= |fibonacci_#t~ret0| 13)) .cse2 .cse3 .cse4 (and (<= |fibonacci_#t~ret0| 8) (<= 8 |fibonacci_#t~ret0|) (<= |fibonacci_#in~n| 7)) .cse5 (<= 10 |fibonacci_#in~n|) (and (<= |fibonacci_#t~ret0| 21) (<= 21 |fibonacci_#t~ret0|) (<= 9 |fibonacci_#in~n|))) (or (and (<= |fibonacci_#in~n| 2) (<= 2 fibonacci_~n) .cse6) .cse2 .cse3 (and .cse0 .cse4 .cse1 (<= 3 fibonacci_~n) .cse6) .cse5 (and (<= 7 |fibonacci_#in~n|) .cse7 .cse6)) (or (and (<= 3 |fibonacci_#t~ret0|) (<= |fibonacci_#t~ret0| 3)) (or (< 5 |fibonacci_#in~n|) (< |fibonacci_#in~n| 5))) (or (and (<= 5 |fibonacci_#t~ret0|) (<= |fibonacci_#t~ret0| 5)) (< |fibonacci_#in~n| 6) (< 6 |fibonacci_#in~n|)))))
[2018-12-08 07:54:42,298 INFO L448 ceAbstractionStarter]: For program point fibonacciEXIT(lines 14 22) no Hoare annotation was computed.
[2018-12-08 07:54:42,298 INFO L448 ceAbstractionStarter]: For program point L17(lines 17 21) no Hoare annotation was computed.
[2018-12-08 07:54:42,298 INFO L448 ceAbstractionStarter]: For program point L20-3(line 20) no Hoare annotation was computed.
[2018-12-08 07:54:42,298 INFO L448 ceAbstractionStarter]: For program point L15(lines 15 21) no Hoare annotation was computed.
[2018-12-08 07:54:42,298 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true
[2018-12-08 07:54:42,298 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed.
[2018-12-08 07:54:42,298 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed.
[2018-12-08 07:54:42,298 INFO L451 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true
[2018-12-08 07:54:42,298 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true
[2018-12-08 07:54:42,298 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed.
[2018-12-08 07:54:42,298 INFO L448 ceAbstractionStarter]: For program point L31(line 31) no Hoare annotation was computed.
[2018-12-08 07:54:42,298 INFO L451 ceAbstractionStarter]: At program point mainENTRY(lines 25 33) the Hoare annotation is: true
[2018-12-08 07:54:42,298 INFO L448 ceAbstractionStarter]: For program point mainFINAL(lines 25 33) no Hoare annotation was computed.
[2018-12-08 07:54:42,299 INFO L448 ceAbstractionStarter]: For program point L28(lines 28 32) no Hoare annotation was computed.
[2018-12-08 07:54:42,299 INFO L444 ceAbstractionStarter]: At program point L27(line 27) the Hoare annotation is: (and (<= 9 main_~x~0) (<= main_~x~0 9))
[2018-12-08 07:54:42,299 INFO L448 ceAbstractionStarter]: For program point L27-1(line 27) no Hoare annotation was computed.
[2018-12-08 07:54:42,299 INFO L448 ceAbstractionStarter]: For program point mainEXIT(lines 25 33) no Hoare annotation was computed.
[2018-12-08 07:54:42,299 INFO L448 ceAbstractionStarter]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 31) no Hoare annotation was computed.
[2018-12-08 07:54:42,300 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 08.12 07:54:42 BoogieIcfgContainer
[2018-12-08 07:54:42,300 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction----------------------------
[2018-12-08 07:54:42,301 INFO L113 PluginConnector]: ------------------------Witness Printer----------------------------
[2018-12-08 07:54:42,301 INFO L271 PluginConnector]: Initializing Witness Printer...
[2018-12-08 07:54:42,301 INFO L276 PluginConnector]: Witness Printer initialized
[2018-12-08 07:54:42,301 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.12 07:54:32" (3/4) ...
[2018-12-08 07:54:42,303 INFO L144 WitnessPrinter]: Generating witness for correct program
[2018-12-08 07:54:42,307 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure fibonacci
[2018-12-08 07:54:42,307 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init
[2018-12-08 07:54:42,307 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main
[2018-12-08 07:54:42,310 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges
[2018-12-08 07:54:42,310 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges
[2018-12-08 07:54:42,310 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges
[2018-12-08 07:54:42,335 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_a72b2d65-e2b1-46d2-8035-0e5289f9a905/bin-2019/uautomizer/witness.graphml
[2018-12-08 07:54:42,335 INFO L132 PluginConnector]: ------------------------ END Witness Printer----------------------------
[2018-12-08 07:54:42,335 INFO L168 Benchmark]: Toolchain (without parser) took 10115.71 ms. Allocated memory was 1.0 GB in the beginning and 2.1 GB in the end (delta: 1.1 GB). Free memory was 957.1 MB in the beginning and 1.6 GB in the end (delta: -665.8 MB). Peak memory consumption was 436.8 MB. Max. memory is 11.5 GB.
[2018-12-08 07:54:42,336 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 1.0 GB. Free memory is still 976.9 MB. There was no memory consumed. Max. memory is 11.5 GB.
[2018-12-08 07:54:42,336 INFO L168 Benchmark]: CACSL2BoogieTranslator took 117.89 ms. Allocated memory is still 1.0 GB. Free memory was 957.1 MB in the beginning and 946.3 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB.
[2018-12-08 07:54:42,336 INFO L168 Benchmark]: Boogie Procedure Inliner took 11.44 ms. Allocated memory is still 1.0 GB. Free memory is still 946.3 MB. There was no memory consumed. Max. memory is 11.5 GB.
[2018-12-08 07:54:42,336 INFO L168 Benchmark]: Boogie Preprocessor took 9.96 ms. Allocated memory is still 1.0 GB. Free memory is still 946.3 MB. There was no memory consumed. Max. memory is 11.5 GB.
[2018-12-08 07:54:42,336 INFO L168 Benchmark]: RCFGBuilder took 151.01 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 128.5 MB). Free memory was 946.3 MB in the beginning and 1.1 GB in the end (delta: -161.6 MB). Peak memory consumption was 18.5 MB. Max. memory is 11.5 GB.
[2018-12-08 07:54:42,337 INFO L168 Benchmark]: TraceAbstraction took 9788.41 ms. Allocated memory was 1.2 GB in the beginning and 2.1 GB in the end (delta: 974.1 MB). Free memory was 1.1 GB in the beginning and 1.6 GB in the end (delta: -514.9 MB). Peak memory consumption was 459.2 MB. Max. memory is 11.5 GB.
[2018-12-08 07:54:42,337 INFO L168 Benchmark]: Witness Printer took 34.25 ms. Allocated memory is still 2.1 GB. Free memory is still 1.6 GB. There was no memory consumed. Max. memory is 11.5 GB.
[2018-12-08 07:54:42,338 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] #######################
--- Results ---
* Results from de.uni_freiburg.informatik.ultimate.core:
- StatisticsResult: Toolchain Benchmarks
Benchmark results are:
* CDTParser took 0.13 ms. Allocated memory is still 1.0 GB. Free memory is still 976.9 MB. There was no memory consumed. Max. memory is 11.5 GB.
* CACSL2BoogieTranslator took 117.89 ms. Allocated memory is still 1.0 GB. Free memory was 957.1 MB in the beginning and 946.3 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB.
* Boogie Procedure Inliner took 11.44 ms. Allocated memory is still 1.0 GB. Free memory is still 946.3 MB. There was no memory consumed. Max. memory is 11.5 GB.
* Boogie Preprocessor took 9.96 ms. Allocated memory is still 1.0 GB. Free memory is still 946.3 MB. There was no memory consumed. Max. memory is 11.5 GB.
* RCFGBuilder took 151.01 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 128.5 MB). Free memory was 946.3 MB in the beginning and 1.1 GB in the end (delta: -161.6 MB). Peak memory consumption was 18.5 MB. Max. memory is 11.5 GB.
* TraceAbstraction took 9788.41 ms. Allocated memory was 1.2 GB in the beginning and 2.1 GB in the end (delta: 974.1 MB). Free memory was 1.1 GB in the beginning and 1.6 GB in the end (delta: -514.9 MB). Peak memory consumption was 459.2 MB. Max. memory is 11.5 GB.
* Witness Printer took 34.25 ms. Allocated memory is still 2.1 GB. Free memory is still 1.6 GB. There was no memory consumed. Max. memory is 11.5 GB.
* Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction:
- PositiveResult [Line: 31]: call of __VERIFIER_error() unreachable
For all program executions holds that call of __VERIFIER_error() unreachable at this location
- AllSpecificationsHoldResult: All specifications hold
1 specifications checked. All of them hold
- StatisticsResult: Ultimate Automizer benchmark data
CFG has 4 procedures, 23 locations, 1 error locations. SAFE Result, 9.7s OverallTime, 16 OverallIterations, 151 TraceHistogramMax, 2.7s AutomataDifference, 0.0s DeadEndRemovalTime, 0.6s HoareAnnotationTime, HoareTripleCheckerStatistics: 388 SDtfs, 716 SDslu, 2253 SDs, 0 SdLazy, 2974 SolverSat, 869 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 5486 GetRequests, 5121 SyntacticMatches, 57 SemanticMatches, 308 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1648 ImplicationChecksByTransitivity, 2.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=127occurred in iteration=15, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 16 MinimizatonAttempts, 52 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 233 PreInvPairs, 365 NumberOfFragments, 235 HoareAnnotationTreeSize, 233 FomulaSimplifications, 1337 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 8 FomulaSimplificationsInter, 3241 FormulaSimplificationTreeSizeReductionInter, 0.5s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 1.1s SatisfiabilityAnalysisTime, 3.4s InterpolantComputationTime, 9961 NumberOfCodeBlocks, 9306 NumberOfCodeBlocksAsserted, 271 NumberOfCheckSat, 9931 ConstructedInterpolants, 0 QuantifiedInterpolants, 11465833 SizeOfPredicates, 85 NumberOfNonLiveVariables, 9504 ConjunctsInSsa, 608 ConjunctsInUnsatCore, 30 InterpolantComputations, 2 PerfectInterpolantSequences, 338620/389286 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available
RESULT: Ultimate proved your program to be correct!
Received shutdown request...