./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/memsafety-ext3/naturalNumbers1.c --full-output --architecture 32bit
--------------------------------------------------------------------------------
Checking for memory safety (deref-memtrack)
Using default analysis
Version 678e0110
Using bit-precise analysis
Retrying with bit-precise analysis
Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx12G -Xms1G -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/memsafety-ext3/naturalNumbers1.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) )
CHECK( init(main()), LTL(G valid-deref) )
CHECK( init(main()), LTL(G valid-memtrack) )
--witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 932f76685ed1816d93a388d0ab1addae9c51483a
.................................................................................................................................................................................................................................................................................................................................................................................................................................................
Execution finished normally
Writing output log to file Ultimate.log
Result:
TRUE
--- Real Ultimate output ---
Skipped default analysis because property is memsafety
### Bit-precise run ###
This is Ultimate 0.1.24-678e011
[2019-11-19 22:16:08,323 INFO L177 SettingsManager]: Resetting all preferences to default values...
[2019-11-19 22:16:08,326 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values
[2019-11-19 22:16:08,338 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2019-11-19 22:16:08,339 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2019-11-19 22:16:08,340 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2019-11-19 22:16:08,342 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2019-11-19 22:16:08,344 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values
[2019-11-19 22:16:08,345 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values
[2019-11-19 22:16:08,347 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values
[2019-11-19 22:16:08,348 INFO L181 SettingsManager]: Resetting Sifa preferences to default values
[2019-11-19 22:16:08,349 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2019-11-19 22:16:08,349 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values
[2019-11-19 22:16:08,350 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values
[2019-11-19 22:16:08,351 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2019-11-19 22:16:08,353 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values
[2019-11-19 22:16:08,354 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2019-11-19 22:16:08,355 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2019-11-19 22:16:08,357 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2019-11-19 22:16:08,359 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values
[2019-11-19 22:16:08,361 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2019-11-19 22:16:08,362 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values
[2019-11-19 22:16:08,363 INFO L181 SettingsManager]: Resetting Referee preferences to default values
[2019-11-19 22:16:08,364 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values
[2019-11-19 22:16:08,366 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2019-11-19 22:16:08,367 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2019-11-19 22:16:08,367 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values
[2019-11-19 22:16:08,368 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values
[2019-11-19 22:16:08,368 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values
[2019-11-19 22:16:08,369 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring...
[2019-11-19 22:16:08,370 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values
[2019-11-19 22:16:08,371 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2019-11-19 22:16:08,372 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values
[2019-11-19 22:16:08,372 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values
[2019-11-19 22:16:08,373 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2019-11-19 22:16:08,374 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values
[2019-11-19 22:16:08,375 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2019-11-19 22:16:08,375 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring...
[2019-11-19 22:16:08,375 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values
[2019-11-19 22:16:08,376 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values
[2019-11-19 22:16:08,377 INFO L188 SettingsManager]: Finished resetting all preferences to default values...
[2019-11-19 22:16:08,378 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf
[2019-11-19 22:16:08,392 INFO L113 SettingsManager]: Loading preferences was successful
[2019-11-19 22:16:08,393 INFO L115 SettingsManager]: Preferences different from defaults after loading the file:
[2019-11-19 22:16:08,394 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2019-11-19 22:16:08,394 INFO L138 SettingsManager]: * Create parallel compositions if possible=false
[2019-11-19 22:16:08,394 INFO L138 SettingsManager]: * Use SBE=true
[2019-11-19 22:16:08,395 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2019-11-19 22:16:08,395 INFO L138 SettingsManager]: * sizeof long=4
[2019-11-19 22:16:08,395 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false
[2019-11-19 22:16:08,396 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true
[2019-11-19 22:16:08,396 INFO L138 SettingsManager]: * sizeof POINTER=4
[2019-11-19 22:16:08,396 INFO L138 SettingsManager]: * Check division by zero=IGNORE
[2019-11-19 22:16:08,396 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true
[2019-11-19 22:16:08,397 INFO L138 SettingsManager]: * Bitprecise bitfields=true
[2019-11-19 22:16:08,397 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true
[2019-11-19 22:16:08,397 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE
[2019-11-19 22:16:08,398 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true
[2019-11-19 22:16:08,398 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution
[2019-11-19 22:16:08,398 INFO L138 SettingsManager]: * sizeof long double=12
[2019-11-19 22:16:08,398 INFO L138 SettingsManager]: * Use constant arrays=true
[2019-11-19 22:16:08,399 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2019-11-19 22:16:08,399 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements
[2019-11-19 22:16:08,399 INFO L138 SettingsManager]: * To the following directory=./dump/
[2019-11-19 22:16:08,400 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode
[2019-11-19 22:16:08,400 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2019-11-19 22:16:08,400 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2019-11-19 22:16:08,400 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP
[2019-11-19 22:16:08,401 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF
[2019-11-19 22:16:08,401 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt
[2019-11-19 22:16:08,401 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode
[2019-11-19 22:16:08,401 INFO L138 SettingsManager]: * Logic for external solver=AUFBV
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 -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux
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 valid-free) )
CHECK( init(main()), LTL(G valid-deref) )
CHECK( init(main()), LTL(G valid-memtrack) )
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 -> 932f76685ed1816d93a388d0ab1addae9c51483a
[2019-11-19 22:16:08,689 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp
[2019-11-19 22:16:08,709 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2019-11-19 22:16:08,713 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2019-11-19 22:16:08,714 INFO L271 PluginConnector]: Initializing CDTParser...
[2019-11-19 22:16:08,715 INFO L275 PluginConnector]: CDTParser initialized
[2019-11-19 22:16:08,716 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/memsafety-ext3/naturalNumbers1.c
[2019-11-19 22:16:08,788 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d23901aea/de08e14ae0e84a7c88dd3aab36ca7026/FLAG301ce2677
[2019-11-19 22:16:09,256 INFO L306 CDTParser]: Found 1 translation units.
[2019-11-19 22:16:09,257 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/memsafety-ext3/naturalNumbers1.c
[2019-11-19 22:16:09,261 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d23901aea/de08e14ae0e84a7c88dd3aab36ca7026/FLAG301ce2677
[2019-11-19 22:16:09,640 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d23901aea/de08e14ae0e84a7c88dd3aab36ca7026
[2019-11-19 22:16:09,644 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2019-11-19 22:16:09,645 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements.
[2019-11-19 22:16:09,646 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2019-11-19 22:16:09,647 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator...
[2019-11-19 22:16:09,651 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized
[2019-11-19 22:16:09,652 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 10:16:09" (1/1) ...
[2019-11-19 22:16:09,655 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4abddd2e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:16:09, skipping insertion in model container
[2019-11-19 22:16:09,655 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 10:16:09" (1/1) ...
[2019-11-19 22:16:09,663 INFO L142 MainTranslator]: Starting translation in SV-COMP mode
[2019-11-19 22:16:09,678 INFO L173 MainTranslator]: Built tables and reachable declarations
[2019-11-19 22:16:09,891 INFO L206 PostProcessor]: Analyzing one entry point: main
[2019-11-19 22:16:09,905 INFO L188 MainTranslator]: Completed pre-run
[2019-11-19 22:16:09,924 INFO L206 PostProcessor]: Analyzing one entry point: main
[2019-11-19 22:16:09,944 INFO L192 MainTranslator]: Completed translation
[2019-11-19 22:16:09,944 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:16:09 WrapperNode
[2019-11-19 22:16:09,945 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2019-11-19 22:16:09,946 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2019-11-19 22:16:09,946 INFO L271 PluginConnector]: Initializing Boogie Preprocessor...
[2019-11-19 22:16:09,946 INFO L275 PluginConnector]: Boogie Preprocessor initialized
[2019-11-19 22:16:10,015 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:16:09" (1/1) ...
[2019-11-19 22:16:10,015 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:16:09" (1/1) ...
[2019-11-19 22:16:10,025 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:16:09" (1/1) ...
[2019-11-19 22:16:10,026 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:16:09" (1/1) ...
[2019-11-19 22:16:10,036 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:16:09" (1/1) ...
[2019-11-19 22:16:10,041 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:16:09" (1/1) ...
[2019-11-19 22:16:10,043 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:16:09" (1/1) ...
[2019-11-19 22:16:10,046 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2019-11-19 22:16:10,046 INFO L113 PluginConnector]: ------------------------RCFGBuilder----------------------------
[2019-11-19 22:16:10,047 INFO L271 PluginConnector]: Initializing RCFGBuilder...
[2019-11-19 22:16:10,047 INFO L275 PluginConnector]: RCFGBuilder initialized
[2019-11-19 22:16:10,051 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:16:09" (1/1) ...
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2019-11-19 22:16:10,103 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2019-11-19 22:16:10,103 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2019-11-19 22:16:10,103 INFO L138 BoogieDeclarations]: Found implementation of procedure areNatural
[2019-11-19 22:16:10,103 INFO L138 BoogieDeclarations]: Found implementation of procedure main
[2019-11-19 22:16:10,104 INFO L130 BoogieDeclarations]: Found specification of procedure areNatural
[2019-11-19 22:16:10,104 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4
[2019-11-19 22:16:10,104 INFO L130 BoogieDeclarations]: Found specification of procedure main
[2019-11-19 22:16:10,104 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack
[2019-11-19 22:16:10,104 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1
[2019-11-19 22:16:10,105 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc
[2019-11-19 22:16:10,105 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2019-11-19 22:16:10,105 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2019-11-19 22:16:10,105 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1
[2019-11-19 22:16:10,105 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4
[2019-11-19 22:16:10,106 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1
[2019-11-19 22:16:10,414 INFO L280 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2019-11-19 22:16:10,415 INFO L285 CfgBuilder]: Removed 1 assume(true) statements.
[2019-11-19 22:16:10,417 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 10:16:10 BoogieIcfgContainer
[2019-11-19 22:16:10,417 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2019-11-19 22:16:10,418 INFO L113 PluginConnector]: ------------------------TraceAbstraction----------------------------
[2019-11-19 22:16:10,419 INFO L271 PluginConnector]: Initializing TraceAbstraction...
[2019-11-19 22:16:10,422 INFO L275 PluginConnector]: TraceAbstraction initialized
[2019-11-19 22:16:10,422 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 10:16:09" (1/3) ...
[2019-11-19 22:16:10,423 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3aa0129f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 10:16:10, skipping insertion in model container
[2019-11-19 22:16:10,424 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:16:09" (2/3) ...
[2019-11-19 22:16:10,424 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3aa0129f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 10:16:10, skipping insertion in model container
[2019-11-19 22:16:10,424 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 10:16:10" (3/3) ...
[2019-11-19 22:16:10,426 INFO L109 eAbstractionObserver]: Analyzing ICFG naturalNumbers1.c
[2019-11-19 22:16:10,449 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2019-11-19 22:16:10,456 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations.
[2019-11-19 22:16:10,476 INFO L249 AbstractCegarLoop]: Starting to check reachability of 3 error locations.
[2019-11-19 22:16:10,500 INFO L373 AbstractCegarLoop]: Interprodecural is true
[2019-11-19 22:16:10,500 INFO L374 AbstractCegarLoop]: Hoare is false
[2019-11-19 22:16:10,501 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP
[2019-11-19 22:16:10,501 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2019-11-19 22:16:10,501 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2019-11-19 22:16:10,501 INFO L378 AbstractCegarLoop]: Difference is false
[2019-11-19 22:16:10,501 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2019-11-19 22:16:10,501 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2019-11-19 22:16:10,514 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states.
[2019-11-19 22:16:10,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11
[2019-11-19 22:16:10,522 INFO L402 BasicCegarLoop]: Found error trace
[2019-11-19 22:16:10,523 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-11-19 22:16:10,523 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr0ENSURES_VIOLATIONMEMORY_LEAK, areNaturalErr1REQUIRES_VIOLATION, areNaturalErr0REQUIRES_VIOLATION]===
[2019-11-19 22:16:10,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2019-11-19 22:16:10,529 INFO L82 PathProgramCache]: Analyzing trace with hash -1845664052, now seen corresponding path program 1 times
[2019-11-19 22:16:10,540 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF
[2019-11-19 22:16:10,541 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [118877380]
[2019-11-19 22:16:10,541 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4
Starting monitored process 2 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 2 with cvc4 --incremental --print-success --lang smt --rewrite-divk
[2019-11-19 22:16:10,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-19 22:16:10,649 INFO L255 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 4 conjunts are in the unsatisfiable core
[2019-11-19 22:16:10,655 INFO L278 TraceCheckSpWp]: Computing forward predicates...
[2019-11-19 22:16:10,716 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5
[2019-11-19 22:16:10,716 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts.
[2019-11-19 22:16:10,729 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size
[2019-11-19 22:16:10,729 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts.
[2019-11-19 22:16:10,730 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5
[2019-11-19 22:16:10,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-11-19 22:16:10,776 INFO L320 TraceCheckSpWp]: Computing backward predicates...
[2019-11-19 22:16:10,796 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-11-19 22:16:10,797 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [118877380]
[2019-11-19 22:16:10,798 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences.
[2019-11-19 22:16:10,799 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4
[2019-11-19 22:16:10,799 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922413171]
[2019-11-19 22:16:10,804 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states
[2019-11-19 22:16:10,805 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF
[2019-11-19 22:16:10,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2019-11-19 22:16:10,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2019-11-19 22:16:10,822 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 5 states.
[2019-11-19 22:16:10,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-11-19 22:16:10,925 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions.
[2019-11-19 22:16:10,926 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states.
[2019-11-19 22:16:10,928 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10
[2019-11-19 22:16:10,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2019-11-19 22:16:10,937 INFO L225 Difference]: With dead ends: 21
[2019-11-19 22:16:10,937 INFO L226 Difference]: Without dead ends: 18
[2019-11-19 22:16:10,938 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30
[2019-11-19 22:16:10,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states.
[2019-11-19 22:16:10,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18.
[2019-11-19 22:16:10,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states.
[2019-11-19 22:16:10,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions.
[2019-11-19 22:16:10,973 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 10
[2019-11-19 22:16:10,973 INFO L84 Accepts]: Finished accepts. word is rejected.
[2019-11-19 22:16:10,973 INFO L462 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions.
[2019-11-19 22:16:10,973 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states.
[2019-11-19 22:16:10,974 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions.
[2019-11-19 22:16:10,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11
[2019-11-19 22:16:10,974 INFO L402 BasicCegarLoop]: Found error trace
[2019-11-19 22:16:10,974 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-11-19 22:16:11,177 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 cvc4 --incremental --print-success --lang smt --rewrite-divk
[2019-11-19 22:16:11,178 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr0ENSURES_VIOLATIONMEMORY_LEAK, areNaturalErr1REQUIRES_VIOLATION, areNaturalErr0REQUIRES_VIOLATION]===
[2019-11-19 22:16:11,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2019-11-19 22:16:11,178 INFO L82 PathProgramCache]: Analyzing trace with hash -1845664051, now seen corresponding path program 1 times
[2019-11-19 22:16:11,180 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF
[2019-11-19 22:16:11,180 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1277566993]
[2019-11-19 22:16:11,180 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4
Starting monitored process 3 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 3 with cvc4 --incremental --print-success --lang smt --rewrite-divk
[2019-11-19 22:16:11,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-19 22:16:11,264 INFO L255 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 8 conjunts are in the unsatisfiable core
[2019-11-19 22:16:11,266 INFO L278 TraceCheckSpWp]: Computing forward predicates...
[2019-11-19 22:16:11,279 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5
[2019-11-19 22:16:11,279 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts.
[2019-11-19 22:16:11,289 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size
[2019-11-19 22:16:11,290 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts.
[2019-11-19 22:16:11,290 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9
[2019-11-19 22:16:11,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-11-19 22:16:11,337 INFO L320 TraceCheckSpWp]: Computing backward predicates...
[2019-11-19 22:16:11,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-11-19 22:16:11,575 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1277566993]
[2019-11-19 22:16:11,576 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences.
[2019-11-19 22:16:11,576 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7
[2019-11-19 22:16:11,576 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941794419]
[2019-11-19 22:16:11,578 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states
[2019-11-19 22:16:11,578 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF
[2019-11-19 22:16:11,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2019-11-19 22:16:11,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56
[2019-11-19 22:16:11,582 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 8 states.
[2019-11-19 22:16:11,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-11-19 22:16:11,926 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions.
[2019-11-19 22:16:11,928 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states.
[2019-11-19 22:16:11,929 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 10
[2019-11-19 22:16:11,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2019-11-19 22:16:11,933 INFO L225 Difference]: With dead ends: 28
[2019-11-19 22:16:11,934 INFO L226 Difference]: Without dead ends: 28
[2019-11-19 22:16:11,936 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90
[2019-11-19 22:16:11,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states.
[2019-11-19 22:16:11,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 23.
[2019-11-19 22:16:11,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states.
[2019-11-19 22:16:11,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions.
[2019-11-19 22:16:11,943 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 10
[2019-11-19 22:16:11,943 INFO L84 Accepts]: Finished accepts. word is rejected.
[2019-11-19 22:16:11,943 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions.
[2019-11-19 22:16:11,944 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states.
[2019-11-19 22:16:11,944 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions.
[2019-11-19 22:16:11,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16
[2019-11-19 22:16:11,945 INFO L402 BasicCegarLoop]: Found error trace
[2019-11-19 22:16:11,945 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-11-19 22:16:12,147 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 cvc4 --incremental --print-success --lang smt --rewrite-divk
[2019-11-19 22:16:12,148 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr0ENSURES_VIOLATIONMEMORY_LEAK, areNaturalErr1REQUIRES_VIOLATION, areNaturalErr0REQUIRES_VIOLATION]===
[2019-11-19 22:16:12,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2019-11-19 22:16:12,150 INFO L82 PathProgramCache]: Analyzing trace with hash -1907814666, now seen corresponding path program 1 times
[2019-11-19 22:16:12,151 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF
[2019-11-19 22:16:12,151 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1300220887]
[2019-11-19 22:16:12,151 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4
Starting monitored process 4 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 4 with cvc4 --incremental --print-success --lang smt --rewrite-divk
[2019-11-19 22:16:12,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-19 22:16:12,247 INFO L255 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 7 conjunts are in the unsatisfiable core
[2019-11-19 22:16:12,249 INFO L278 TraceCheckSpWp]: Computing forward predicates...
[2019-11-19 22:16:12,254 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5
[2019-11-19 22:16:12,254 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts.
[2019-11-19 22:16:12,256 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size
[2019-11-19 22:16:12,257 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts.
[2019-11-19 22:16:12,257 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5
[2019-11-19 22:16:12,340 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size
[2019-11-19 22:16:12,340 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 39
[2019-11-19 22:16:12,342 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts.
[2019-11-19 22:16:12,368 INFO L567 ElimStorePlain]: treesize reduction 10, result has 60.0 percent of original size
[2019-11-19 22:16:12,370 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2019-11-19 22:16:12,374 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts.
[2019-11-19 22:16:12,375 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:17, output treesize:15
[2019-11-19 22:16:12,375 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2019-11-19 22:16:12,399 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2019-11-19 22:16:12,418 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2019-11-19 22:16:12,444 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2019-11-19 22:16:12,469 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2019-11-19 22:16:12,486 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2019-11-19 22:16:12,503 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2019-11-19 22:16:12,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-11-19 22:16:12,543 INFO L320 TraceCheckSpWp]: Computing backward predicates...
[2019-11-19 22:16:14,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-11-19 22:16:14,641 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1300220887]
[2019-11-19 22:16:14,641 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences.
[2019-11-19 22:16:14,641 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 8
[2019-11-19 22:16:14,642 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633197210]
[2019-11-19 22:16:14,642 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states
[2019-11-19 22:16:14,643 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF
[2019-11-19 22:16:14,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants.
[2019-11-19 22:16:14,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=50, Unknown=1, NotChecked=0, Total=72
[2019-11-19 22:16:14,644 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand 9 states.
[2019-11-19 22:16:14,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-11-19 22:16:14,809 INFO L93 Difference]: Finished difference Result 22 states and 25 transitions.
[2019-11-19 22:16:14,810 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states.
[2019-11-19 22:16:14,811 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15
[2019-11-19 22:16:14,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2019-11-19 22:16:14,811 INFO L225 Difference]: With dead ends: 22
[2019-11-19 22:16:14,812 INFO L226 Difference]: Without dead ends: 17
[2019-11-19 22:16:14,812 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 7 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=34, Invalid=75, Unknown=1, NotChecked=0, Total=110
[2019-11-19 22:16:14,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states.
[2019-11-19 22:16:14,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17.
[2019-11-19 22:16:14,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states.
[2019-11-19 22:16:14,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions.
[2019-11-19 22:16:14,816 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15
[2019-11-19 22:16:14,816 INFO L84 Accepts]: Finished accepts. word is rejected.
[2019-11-19 22:16:14,816 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions.
[2019-11-19 22:16:14,816 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states.
[2019-11-19 22:16:14,817 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions.
[2019-11-19 22:16:14,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17
[2019-11-19 22:16:14,817 INFO L402 BasicCegarLoop]: Found error trace
[2019-11-19 22:16:14,817 INFO L410 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-11-19 22:16:15,026 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 cvc4 --incremental --print-success --lang smt --rewrite-divk
[2019-11-19 22:16:15,027 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr0ENSURES_VIOLATIONMEMORY_LEAK, areNaturalErr1REQUIRES_VIOLATION, areNaturalErr0REQUIRES_VIOLATION]===
[2019-11-19 22:16:15,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2019-11-19 22:16:15,028 INFO L82 PathProgramCache]: Analyzing trace with hash 1004346541, now seen corresponding path program 1 times
[2019-11-19 22:16:15,029 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF
[2019-11-19 22:16:15,029 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1053056729]
[2019-11-19 22:16:15,029 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4
Starting monitored process 5 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 5 with cvc4 --incremental --print-success --lang smt --rewrite-divk
[2019-11-19 22:16:15,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-19 22:16:15,128 INFO L255 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core
[2019-11-19 22:16:15,130 INFO L278 TraceCheckSpWp]: Computing forward predicates...
[2019-11-19 22:16:15,195 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8
[2019-11-19 22:16:15,196 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts.
[2019-11-19 22:16:15,199 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size
[2019-11-19 22:16:15,199 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts.
[2019-11-19 22:16:15,199 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:16, output treesize:4
[2019-11-19 22:16:15,221 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked.
[2019-11-19 22:16:15,221 INFO L320 TraceCheckSpWp]: Computing backward predicates...
[2019-11-19 22:16:15,323 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked.
[2019-11-19 22:16:15,323 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1053056729]
[2019-11-19 22:16:15,324 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences.
[2019-11-19 22:16:15,324 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 10
[2019-11-19 22:16:15,324 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699135503]
[2019-11-19 22:16:15,325 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states
[2019-11-19 22:16:15,325 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF
[2019-11-19 22:16:15,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants.
[2019-11-19 22:16:15,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90
[2019-11-19 22:16:15,326 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 10 states.
[2019-11-19 22:16:15,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-11-19 22:16:15,442 INFO L93 Difference]: Finished difference Result 11 states and 10 transitions.
[2019-11-19 22:16:15,442 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states.
[2019-11-19 22:16:15,442 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 16
[2019-11-19 22:16:15,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2019-11-19 22:16:15,443 INFO L225 Difference]: With dead ends: 11
[2019-11-19 22:16:15,443 INFO L226 Difference]: Without dead ends: 0
[2019-11-19 22:16:15,444 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132
[2019-11-19 22:16:15,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states.
[2019-11-19 22:16:15,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0.
[2019-11-19 22:16:15,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states.
[2019-11-19 22:16:15,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions.
[2019-11-19 22:16:15,445 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 16
[2019-11-19 22:16:15,445 INFO L84 Accepts]: Finished accepts. word is rejected.
[2019-11-19 22:16:15,445 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions.
[2019-11-19 22:16:15,446 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states.
[2019-11-19 22:16:15,446 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions.
[2019-11-19 22:16:15,446 INFO L282 IsEmpty]: Finished isEmpty. No accepting run.
[2019-11-19 22:16:15,650 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 cvc4 --incremental --print-success --lang smt --rewrite-divk
[2019-11-19 22:16:15,656 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.11 10:16:15 BoogieIcfgContainer
[2019-11-19 22:16:15,656 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction----------------------------
[2019-11-19 22:16:15,656 INFO L113 PluginConnector]: ------------------------Witness Printer----------------------------
[2019-11-19 22:16:15,656 INFO L271 PluginConnector]: Initializing Witness Printer...
[2019-11-19 22:16:15,657 INFO L275 PluginConnector]: Witness Printer initialized
[2019-11-19 22:16:15,657 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 10:16:10" (3/4) ...
[2019-11-19 22:16:15,663 INFO L137 WitnessPrinter]: Generating witness for correct program
[2019-11-19 22:16:15,670 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init
[2019-11-19 22:16:15,670 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main
[2019-11-19 22:16:15,671 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure areNatural
[2019-11-19 22:16:15,675 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 15 nodes and edges
[2019-11-19 22:16:15,676 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges
[2019-11-19 22:16:15,676 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges
[2019-11-19 22:16:15,676 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges
[2019-11-19 22:16:15,676 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges
[2019-11-19 22:16:15,735 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml
[2019-11-19 22:16:15,735 INFO L132 PluginConnector]: ------------------------ END Witness Printer----------------------------
[2019-11-19 22:16:15,739 INFO L168 Benchmark]: Toolchain (without parser) took 6091.74 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 151.5 MB). Free memory was 956.3 MB in the beginning and 954.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 152.9 MB. Max. memory is 11.5 GB.
[2019-11-19 22:16:15,739 INFO L168 Benchmark]: CDTParser took 0.80 ms. Allocated memory is still 1.0 GB. Free memory is still 987.2 MB. There was no memory consumed. Max. memory is 11.5 GB.
[2019-11-19 22:16:15,742 INFO L168 Benchmark]: CACSL2BoogieTranslator took 298.83 ms. Allocated memory is still 1.0 GB. Free memory was 956.3 MB in the beginning and 945.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB.
[2019-11-19 22:16:15,744 INFO L168 Benchmark]: Boogie Preprocessor took 100.41 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 151.5 MB). Free memory was 945.6 MB in the beginning and 1.1 GB in the end (delta: -196.1 MB). Peak memory consumption was 9.7 MB. Max. memory is 11.5 GB.
[2019-11-19 22:16:15,744 INFO L168 Benchmark]: RCFGBuilder took 370.66 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 23.9 MB). Peak memory consumption was 23.9 MB. Max. memory is 11.5 GB.
[2019-11-19 22:16:15,745 INFO L168 Benchmark]: TraceAbstraction took 5237.59 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 954.9 MB in the end (delta: 162.9 MB). Peak memory consumption was 162.9 MB. Max. memory is 11.5 GB.
[2019-11-19 22:16:15,749 INFO L168 Benchmark]: Witness Printer took 79.07 ms. Allocated memory is still 1.2 GB. Free memory is still 954.9 MB. There was no memory consumed. Max. memory is 11.5 GB.
[2019-11-19 22:16:15,755 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] #######################
--- Results ---
* Results from de.uni_freiburg.informatik.ultimate.core:
- StatisticsResult: Toolchain Benchmarks
Benchmark results are:
* CDTParser took 0.80 ms. Allocated memory is still 1.0 GB. Free memory is still 987.2 MB. There was no memory consumed. Max. memory is 11.5 GB.
* CACSL2BoogieTranslator took 298.83 ms. Allocated memory is still 1.0 GB. Free memory was 956.3 MB in the beginning and 945.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB.
* Boogie Preprocessor took 100.41 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 151.5 MB). Free memory was 945.6 MB in the beginning and 1.1 GB in the end (delta: -196.1 MB). Peak memory consumption was 9.7 MB. Max. memory is 11.5 GB.
* RCFGBuilder took 370.66 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 23.9 MB). Peak memory consumption was 23.9 MB. Max. memory is 11.5 GB.
* TraceAbstraction took 5237.59 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 954.9 MB in the end (delta: 162.9 MB). Peak memory consumption was 162.9 MB. Max. memory is 11.5 GB.
* Witness Printer took 79.07 ms. Allocated memory is still 1.2 GB. Free memory is still 954.9 MB. There was no memory consumed. Max. memory is 11.5 GB.
* Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction:
- PositiveResult [Line: 12]: all allocated memory was freed
For all program executions holds that all allocated memory was freed at this location
- PositiveResult [Line: 4]: pointer dereference always succeeds
For all program executions holds that pointer dereference always succeeds at this location
- PositiveResult [Line: 4]: pointer dereference always succeeds
For all program executions holds that pointer dereference always succeeds at this location
- AllSpecificationsHoldResult: All specifications hold
3 specifications checked. All of them hold
- StatisticsResult: Ultimate Automizer benchmark data
CFG has 4 procedures, 22 locations, 3 error locations. Result: SAFE, OverallTime: 5.1s, OverallIterations: 4, TraceHistogramMax: 3, AutomataDifference: 0.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 48 SDtfs, 83 SDslu, 109 SDs, 0 SdLazy, 126 SolverSat, 17 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 106 GetRequests, 67 SyntacticMatches, 8 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 2.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=23occurred in iteration=2, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 5 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 3.0s InterpolantComputationTime, 51 NumberOfCodeBlocks, 51 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 94 ConstructedInterpolants, 7 QuantifiedInterpolants, 6673 SizeOfPredicates, 11 NumberOfNonLiveVariables, 208 ConjunctsInSsa, 28 ConjunctsInUnsatCore, 8 InterpolantComputations, 8 PerfectInterpolantSequences, 14/14 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available
RESULT: Ultimate proved your program to be correct!
Received shutdown request...