./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-properties/splice-2.i --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/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_2f0b9410-16af-4a94-ac63-e0473ba4b589/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_2f0b9410-16af-4a94-ac63-e0473ba4b589/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_2f0b9410-16af-4a94-ac63-e0473ba4b589/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_2f0b9410-16af-4a94-ac63-e0473ba4b589/bin/uautomizer/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-properties/splice-2.i -s /tmp/vcloud-vcloud-master/worker/run_dir_2f0b9410-16af-4a94-ac63-e0473ba4b589/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_2f0b9410-16af-4a94-ac63-e0473ba4b589/bin/uautomizer --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 bb2202e8adc36cf09139287c61f8b63b857ea10d
............................................................................................................................................................................................................................................................................................................................................................................................................................................................................
Execution finished normally
Writing output log to file Ultimate.log
Result:
UNKNOWN: Overapproximated counterexample
--- Real Ultimate output ---
Skipped default analysis because property is memsafety

### Bit-precise run ###
This is Ultimate 0.1.24-678e011
[2019-11-20 04:55:02,584 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2019-11-20 04:55:02,585 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2019-11-20 04:55:02,596 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2019-11-20 04:55:02,596 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2019-11-20 04:55:02,597 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2019-11-20 04:55:02,598 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2019-11-20 04:55:02,600 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2019-11-20 04:55:02,602 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2019-11-20 04:55:02,603 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
[2019-11-20 04:55:02,604 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
[2019-11-20 04:55:02,605 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2019-11-20 04:55:02,605 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2019-11-20 04:55:02,606 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2019-11-20 04:55:02,607 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2019-11-20 04:55:02,611 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2019-11-20 04:55:02,612 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2019-11-20 04:55:02,613 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2019-11-20 04:55:02,615 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2019-11-20 04:55:02,618 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2019-11-20 04:55:02,622 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2019-11-20 04:55:02,625 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2019-11-20 04:55:02,627 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2019-11-20 04:55:02,630 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2019-11-20 04:55:02,632 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2019-11-20 04:55:02,634 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2019-11-20 04:55:02,635 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2019-11-20 04:55:02,635 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2019-11-20 04:55:02,637 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2019-11-20 04:55:02,637 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2019-11-20 04:55:02,638 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2019-11-20 04:55:02,639 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2019-11-20 04:55:02,639 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2019-11-20 04:55:02,640 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2019-11-20 04:55:02,641 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2019-11-20 04:55:02,641 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
[2019-11-20 04:55:02,642 INFO  L184        SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2019-11-20 04:55:02,642 INFO  L184        SettingsManager]: ReqParser provides no preferences, ignoring...
[2019-11-20 04:55:02,642 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
[2019-11-20 04:55:02,643 INFO  L181        SettingsManager]: Resetting Witness Parser preferences to default values
[2019-11-20 04:55:02,643 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2019-11-20 04:55:02,644 INFO  L101        SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_2f0b9410-16af-4a94-ac63-e0473ba4b589/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf
[2019-11-20 04:55:02,658 INFO  L113        SettingsManager]: Loading preferences was successful
[2019-11-20 04:55:02,658 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2019-11-20 04:55:02,659 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2019-11-20 04:55:02,659 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2019-11-20 04:55:02,660 INFO  L138        SettingsManager]:  * Use SBE=true
[2019-11-20 04:55:02,660 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2019-11-20 04:55:02,660 INFO  L138        SettingsManager]:  * sizeof long=4
[2019-11-20 04:55:02,660 INFO  L138        SettingsManager]:  * Check unreachability of error function in SV-COMP mode=false
[2019-11-20 04:55:02,661 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2019-11-20 04:55:02,661 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2019-11-20 04:55:02,662 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2019-11-20 04:55:02,662 INFO  L138        SettingsManager]:  * Check for the main procedure if all allocated memory was freed=true
[2019-11-20 04:55:02,662 INFO  L138        SettingsManager]:  * Bitprecise bitfields=true
[2019-11-20 04:55:02,662 INFO  L138        SettingsManager]:  * SV-COMP memtrack compatibility mode=true
[2019-11-20 04:55:02,662 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2019-11-20 04:55:02,662 INFO  L138        SettingsManager]:  * Use bitvectors instead of ints=true
[2019-11-20 04:55:02,663 INFO  L138        SettingsManager]:  * Memory model=HoenickeLindenmann_4ByteResolution
[2019-11-20 04:55:02,663 INFO  L138        SettingsManager]:  * sizeof long double=12
[2019-11-20 04:55:02,663 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2019-11-20 04:55:02,663 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2019-11-20 04:55:02,663 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2019-11-20 04:55:02,664 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2019-11-20 04:55:02,664 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2019-11-20 04:55:02,664 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2019-11-20 04:55:02,664 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2019-11-20 04:55:02,664 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2019-11-20 04:55:02,664 INFO  L138        SettingsManager]:  * Trace refinement strategy=WOLF
[2019-11-20 04:55:02,665 INFO  L138        SettingsManager]:  * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt
[2019-11-20 04:55:02,665 INFO  L138        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2019-11-20 04:55:02,665 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 -> /tmp/vcloud-vcloud-master/worker/run_dir_2f0b9410-16af-4a94-ac63-e0473ba4b589/bin/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 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 -> bb2202e8adc36cf09139287c61f8b63b857ea10d
[2019-11-20 04:55:02,813 INFO  L81    nceAwareModelManager]: Repository-Root is: /tmp
[2019-11-20 04:55:02,823 INFO  L258   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2019-11-20 04:55:02,826 INFO  L214   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2019-11-20 04:55:02,828 INFO  L271        PluginConnector]: Initializing CDTParser...
[2019-11-20 04:55:02,828 INFO  L275        PluginConnector]: CDTParser initialized
[2019-11-20 04:55:02,829 INFO  L428   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_2f0b9410-16af-4a94-ac63-e0473ba4b589/bin/uautomizer/../../sv-benchmarks/c/list-properties/splice-2.i
[2019-11-20 04:55:02,881 INFO  L220              CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_2f0b9410-16af-4a94-ac63-e0473ba4b589/bin/uautomizer/data/8e29dfbb7/03b5489f656544bf9f2c549983a23ecc/FLAG7faba9778
[2019-11-20 04:55:03,289 INFO  L306              CDTParser]: Found 1 translation units.
[2019-11-20 04:55:03,290 INFO  L160              CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_2f0b9410-16af-4a94-ac63-e0473ba4b589/sv-benchmarks/c/list-properties/splice-2.i
[2019-11-20 04:55:03,301 INFO  L349              CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_2f0b9410-16af-4a94-ac63-e0473ba4b589/bin/uautomizer/data/8e29dfbb7/03b5489f656544bf9f2c549983a23ecc/FLAG7faba9778
[2019-11-20 04:55:03,598 INFO  L357              CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_2f0b9410-16af-4a94-ac63-e0473ba4b589/bin/uautomizer/data/8e29dfbb7/03b5489f656544bf9f2c549983a23ecc
[2019-11-20 04:55:03,600 INFO  L296   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2019-11-20 04:55:03,602 INFO  L131        ToolchainWalker]: Walking toolchain with 5 elements.
[2019-11-20 04:55:03,602 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2019-11-20 04:55:03,602 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2019-11-20 04:55:03,605 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2019-11-20 04:55:03,606 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 04:55:03" (1/1) ...
[2019-11-20 04:55:03,609 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d7b3d16 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 04:55:03, skipping insertion in model container
[2019-11-20 04:55:03,609 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 04:55:03" (1/1) ...
[2019-11-20 04:55:03,615 INFO  L142         MainTranslator]: Starting translation in SV-COMP mode 
[2019-11-20 04:55:03,649 INFO  L173         MainTranslator]: Built tables and reachable declarations
[2019-11-20 04:55:04,075 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2019-11-20 04:55:04,088 INFO  L188         MainTranslator]: Completed pre-run
[2019-11-20 04:55:04,142 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2019-11-20 04:55:04,191 INFO  L192         MainTranslator]: Completed translation
[2019-11-20 04:55:04,192 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 04:55:04 WrapperNode
[2019-11-20 04:55:04,192 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2019-11-20 04:55:04,192 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2019-11-20 04:55:04,193 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2019-11-20 04:55:04,193 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2019-11-20 04:55:04,207 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 04:55:04" (1/1) ...
[2019-11-20 04:55:04,207 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 04:55:04" (1/1) ...
[2019-11-20 04:55:04,222 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 04:55:04" (1/1) ...
[2019-11-20 04:55:04,223 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 04:55:04" (1/1) ...
[2019-11-20 04:55:04,251 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 04:55:04" (1/1) ...
[2019-11-20 04:55:04,256 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 04:55:04" (1/1) ...
[2019-11-20 04:55:04,264 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 04:55:04" (1/1) ...
[2019-11-20 04:55:04,276 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2019-11-20 04:55:04,276 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2019-11-20 04:55:04,276 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2019-11-20 04:55:04,276 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2019-11-20 04:55:04,277 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 04:55:04" (1/1) ...
No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2f0b9410-16af-4a94-ac63-e0473ba4b589/bin/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
[2019-11-20 04:55:04,327 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2019-11-20 04:55:04,327 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2019-11-20 04:55:04,327 INFO  L138     BoogieDeclarations]: Found implementation of procedure __bswap_32
[2019-11-20 04:55:04,327 INFO  L138     BoogieDeclarations]: Found implementation of procedure __bswap_64
[2019-11-20 04:55:04,327 INFO  L138     BoogieDeclarations]: Found implementation of procedure __uint16_identity
[2019-11-20 04:55:04,328 INFO  L138     BoogieDeclarations]: Found implementation of procedure __uint32_identity
[2019-11-20 04:55:04,328 INFO  L138     BoogieDeclarations]: Found implementation of procedure __uint64_identity
[2019-11-20 04:55:04,328 INFO  L138     BoogieDeclarations]: Found implementation of procedure myexit
[2019-11-20 04:55:04,328 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2019-11-20 04:55:04,329 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2019-11-20 04:55:04,329 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int
[2019-11-20 04:55:04,329 INFO  L130     BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max
[2019-11-20 04:55:04,330 INFO  L130     BoogieDeclarations]: Found specification of procedure atof
[2019-11-20 04:55:04,330 INFO  L130     BoogieDeclarations]: Found specification of procedure atoi
[2019-11-20 04:55:04,330 INFO  L130     BoogieDeclarations]: Found specification of procedure atol
[2019-11-20 04:55:04,331 INFO  L130     BoogieDeclarations]: Found specification of procedure atoll
[2019-11-20 04:55:04,331 INFO  L130     BoogieDeclarations]: Found specification of procedure strtod
[2019-11-20 04:55:04,331 INFO  L130     BoogieDeclarations]: Found specification of procedure strtof
[2019-11-20 04:55:04,331 INFO  L130     BoogieDeclarations]: Found specification of procedure strtold
[2019-11-20 04:55:04,331 INFO  L130     BoogieDeclarations]: Found specification of procedure strtol
[2019-11-20 04:55:04,332 INFO  L130     BoogieDeclarations]: Found specification of procedure strtoul
[2019-11-20 04:55:04,332 INFO  L130     BoogieDeclarations]: Found specification of procedure strtoq
[2019-11-20 04:55:04,333 INFO  L130     BoogieDeclarations]: Found specification of procedure strtouq
[2019-11-20 04:55:04,333 INFO  L130     BoogieDeclarations]: Found specification of procedure strtoll
[2019-11-20 04:55:04,334 INFO  L130     BoogieDeclarations]: Found specification of procedure strtoull
[2019-11-20 04:55:04,335 INFO  L130     BoogieDeclarations]: Found specification of procedure l64a
[2019-11-20 04:55:04,335 INFO  L130     BoogieDeclarations]: Found specification of procedure a64l
[2019-11-20 04:55:04,335 INFO  L130     BoogieDeclarations]: Found specification of procedure __bswap_32
[2019-11-20 04:55:04,335 INFO  L130     BoogieDeclarations]: Found specification of procedure __bswap_64
[2019-11-20 04:55:04,335 INFO  L130     BoogieDeclarations]: Found specification of procedure __uint16_identity
[2019-11-20 04:55:04,336 INFO  L130     BoogieDeclarations]: Found specification of procedure __uint32_identity
[2019-11-20 04:55:04,336 INFO  L130     BoogieDeclarations]: Found specification of procedure __uint64_identity
[2019-11-20 04:55:04,336 INFO  L130     BoogieDeclarations]: Found specification of procedure select
[2019-11-20 04:55:04,336 INFO  L130     BoogieDeclarations]: Found specification of procedure pselect
[2019-11-20 04:55:04,336 INFO  L130     BoogieDeclarations]: Found specification of procedure gnu_dev_major
[2019-11-20 04:55:04,336 INFO  L130     BoogieDeclarations]: Found specification of procedure gnu_dev_minor
[2019-11-20 04:55:04,336 INFO  L130     BoogieDeclarations]: Found specification of procedure gnu_dev_makedev
[2019-11-20 04:55:04,337 INFO  L130     BoogieDeclarations]: Found specification of procedure random
[2019-11-20 04:55:04,337 INFO  L130     BoogieDeclarations]: Found specification of procedure srandom
[2019-11-20 04:55:04,337 INFO  L130     BoogieDeclarations]: Found specification of procedure initstate
[2019-11-20 04:55:04,337 INFO  L130     BoogieDeclarations]: Found specification of procedure setstate
[2019-11-20 04:55:04,337 INFO  L130     BoogieDeclarations]: Found specification of procedure random_r
[2019-11-20 04:55:04,338 INFO  L130     BoogieDeclarations]: Found specification of procedure srandom_r
[2019-11-20 04:55:04,338 INFO  L130     BoogieDeclarations]: Found specification of procedure initstate_r
[2019-11-20 04:55:04,338 INFO  L130     BoogieDeclarations]: Found specification of procedure setstate_r
[2019-11-20 04:55:04,339 INFO  L130     BoogieDeclarations]: Found specification of procedure rand
[2019-11-20 04:55:04,339 INFO  L130     BoogieDeclarations]: Found specification of procedure srand
[2019-11-20 04:55:04,340 INFO  L130     BoogieDeclarations]: Found specification of procedure rand_r
[2019-11-20 04:55:04,340 INFO  L130     BoogieDeclarations]: Found specification of procedure drand48
[2019-11-20 04:55:04,340 INFO  L130     BoogieDeclarations]: Found specification of procedure erand48
[2019-11-20 04:55:04,340 INFO  L130     BoogieDeclarations]: Found specification of procedure lrand48
[2019-11-20 04:55:04,340 INFO  L130     BoogieDeclarations]: Found specification of procedure nrand48
[2019-11-20 04:55:04,340 INFO  L130     BoogieDeclarations]: Found specification of procedure mrand48
[2019-11-20 04:55:04,340 INFO  L130     BoogieDeclarations]: Found specification of procedure jrand48
[2019-11-20 04:55:04,341 INFO  L130     BoogieDeclarations]: Found specification of procedure srand48
[2019-11-20 04:55:04,341 INFO  L130     BoogieDeclarations]: Found specification of procedure seed48
[2019-11-20 04:55:04,341 INFO  L130     BoogieDeclarations]: Found specification of procedure lcong48
[2019-11-20 04:55:04,341 INFO  L130     BoogieDeclarations]: Found specification of procedure drand48_r
[2019-11-20 04:55:04,341 INFO  L130     BoogieDeclarations]: Found specification of procedure erand48_r
[2019-11-20 04:55:04,341 INFO  L130     BoogieDeclarations]: Found specification of procedure lrand48_r
[2019-11-20 04:55:04,342 INFO  L130     BoogieDeclarations]: Found specification of procedure nrand48_r
[2019-11-20 04:55:04,342 INFO  L130     BoogieDeclarations]: Found specification of procedure mrand48_r
[2019-11-20 04:55:04,342 INFO  L130     BoogieDeclarations]: Found specification of procedure jrand48_r
[2019-11-20 04:55:04,342 INFO  L130     BoogieDeclarations]: Found specification of procedure srand48_r
[2019-11-20 04:55:04,342 INFO  L130     BoogieDeclarations]: Found specification of procedure seed48_r
[2019-11-20 04:55:04,342 INFO  L130     BoogieDeclarations]: Found specification of procedure lcong48_r
[2019-11-20 04:55:04,342 INFO  L130     BoogieDeclarations]: Found specification of procedure malloc
[2019-11-20 04:55:04,343 INFO  L130     BoogieDeclarations]: Found specification of procedure calloc
[2019-11-20 04:55:04,343 INFO  L130     BoogieDeclarations]: Found specification of procedure realloc
[2019-11-20 04:55:04,343 INFO  L130     BoogieDeclarations]: Found specification of procedure free
[2019-11-20 04:55:04,344 INFO  L130     BoogieDeclarations]: Found specification of procedure alloca
[2019-11-20 04:55:04,344 INFO  L130     BoogieDeclarations]: Found specification of procedure valloc
[2019-11-20 04:55:04,345 INFO  L130     BoogieDeclarations]: Found specification of procedure posix_memalign
[2019-11-20 04:55:04,345 INFO  L130     BoogieDeclarations]: Found specification of procedure aligned_alloc
[2019-11-20 04:55:04,345 INFO  L130     BoogieDeclarations]: Found specification of procedure abort
[2019-11-20 04:55:04,346 INFO  L130     BoogieDeclarations]: Found specification of procedure atexit
[2019-11-20 04:55:04,346 INFO  L130     BoogieDeclarations]: Found specification of procedure at_quick_exit
[2019-11-20 04:55:04,346 INFO  L130     BoogieDeclarations]: Found specification of procedure on_exit
[2019-11-20 04:55:04,346 INFO  L130     BoogieDeclarations]: Found specification of procedure exit
[2019-11-20 04:55:04,347 INFO  L130     BoogieDeclarations]: Found specification of procedure quick_exit
[2019-11-20 04:55:04,347 INFO  L130     BoogieDeclarations]: Found specification of procedure _Exit
[2019-11-20 04:55:04,347 INFO  L130     BoogieDeclarations]: Found specification of procedure getenv
[2019-11-20 04:55:04,347 INFO  L130     BoogieDeclarations]: Found specification of procedure putenv
[2019-11-20 04:55:04,347 INFO  L130     BoogieDeclarations]: Found specification of procedure setenv
[2019-11-20 04:55:04,347 INFO  L130     BoogieDeclarations]: Found specification of procedure unsetenv
[2019-11-20 04:55:04,347 INFO  L130     BoogieDeclarations]: Found specification of procedure clearenv
[2019-11-20 04:55:04,347 INFO  L130     BoogieDeclarations]: Found specification of procedure mktemp
[2019-11-20 04:55:04,348 INFO  L130     BoogieDeclarations]: Found specification of procedure mkstemp
[2019-11-20 04:55:04,348 INFO  L130     BoogieDeclarations]: Found specification of procedure mkstemps
[2019-11-20 04:55:04,348 INFO  L130     BoogieDeclarations]: Found specification of procedure mkdtemp
[2019-11-20 04:55:04,348 INFO  L130     BoogieDeclarations]: Found specification of procedure system
[2019-11-20 04:55:04,348 INFO  L130     BoogieDeclarations]: Found specification of procedure realpath
[2019-11-20 04:55:04,348 INFO  L130     BoogieDeclarations]: Found specification of procedure bsearch
[2019-11-20 04:55:04,348 INFO  L130     BoogieDeclarations]: Found specification of procedure qsort
[2019-11-20 04:55:04,349 INFO  L130     BoogieDeclarations]: Found specification of procedure abs
[2019-11-20 04:55:04,349 INFO  L130     BoogieDeclarations]: Found specification of procedure labs
[2019-11-20 04:55:04,349 INFO  L130     BoogieDeclarations]: Found specification of procedure llabs
[2019-11-20 04:55:04,349 INFO  L130     BoogieDeclarations]: Found specification of procedure div
[2019-11-20 04:55:04,349 INFO  L130     BoogieDeclarations]: Found specification of procedure ldiv
[2019-11-20 04:55:04,349 INFO  L130     BoogieDeclarations]: Found specification of procedure lldiv
[2019-11-20 04:55:04,349 INFO  L130     BoogieDeclarations]: Found specification of procedure ecvt
[2019-11-20 04:55:04,349 INFO  L130     BoogieDeclarations]: Found specification of procedure fcvt
[2019-11-20 04:55:04,350 INFO  L130     BoogieDeclarations]: Found specification of procedure gcvt
[2019-11-20 04:55:04,350 INFO  L130     BoogieDeclarations]: Found specification of procedure qecvt
[2019-11-20 04:55:04,350 INFO  L130     BoogieDeclarations]: Found specification of procedure qfcvt
[2019-11-20 04:55:04,350 INFO  L130     BoogieDeclarations]: Found specification of procedure qgcvt
[2019-11-20 04:55:04,350 INFO  L130     BoogieDeclarations]: Found specification of procedure ecvt_r
[2019-11-20 04:55:04,351 INFO  L130     BoogieDeclarations]: Found specification of procedure fcvt_r
[2019-11-20 04:55:04,351 INFO  L130     BoogieDeclarations]: Found specification of procedure qecvt_r
[2019-11-20 04:55:04,351 INFO  L130     BoogieDeclarations]: Found specification of procedure qfcvt_r
[2019-11-20 04:55:04,351 INFO  L130     BoogieDeclarations]: Found specification of procedure mblen
[2019-11-20 04:55:04,351 INFO  L130     BoogieDeclarations]: Found specification of procedure mbtowc
[2019-11-20 04:55:04,351 INFO  L130     BoogieDeclarations]: Found specification of procedure wctomb
[2019-11-20 04:55:04,351 INFO  L130     BoogieDeclarations]: Found specification of procedure mbstowcs
[2019-11-20 04:55:04,351 INFO  L130     BoogieDeclarations]: Found specification of procedure wcstombs
[2019-11-20 04:55:04,352 INFO  L130     BoogieDeclarations]: Found specification of procedure rpmatch
[2019-11-20 04:55:04,352 INFO  L130     BoogieDeclarations]: Found specification of procedure getsubopt
[2019-11-20 04:55:04,352 INFO  L130     BoogieDeclarations]: Found specification of procedure getloadavg
[2019-11-20 04:55:04,353 INFO  L130     BoogieDeclarations]: Found specification of procedure myexit
[2019-11-20 04:55:04,353 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2019-11-20 04:55:04,353 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap
[2019-11-20 04:55:04,353 INFO  L130     BoogieDeclarations]: Found specification of procedure write~intINTTYPE4
[2019-11-20 04:55:04,353 INFO  L130     BoogieDeclarations]: Found specification of procedure write~$Pointer$
[2019-11-20 04:55:04,354 INFO  L130     BoogieDeclarations]: Found specification of procedure read~$Pointer$
[2019-11-20 04:55:04,354 INFO  L130     BoogieDeclarations]: Found specification of procedure read~intINTTYPE4
[2019-11-20 04:55:04,354 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2019-11-20 04:55:04,354 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2019-11-20 04:55:04,354 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc
[2019-11-20 04:55:04,803 INFO  L689   $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true;
[2019-11-20 04:55:05,226 INFO  L280             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2019-11-20 04:55:05,227 INFO  L285             CfgBuilder]: Removed 4 assume(true) statements.
[2019-11-20 04:55:05,228 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 04:55:05 BoogieIcfgContainer
[2019-11-20 04:55:05,228 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2019-11-20 04:55:05,229 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2019-11-20 04:55:05,229 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2019-11-20 04:55:05,232 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2019-11-20 04:55:05,232 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 04:55:03" (1/3) ...
[2019-11-20 04:55:05,233 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@229770c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 04:55:05, skipping insertion in model container
[2019-11-20 04:55:05,233 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 04:55:04" (2/3) ...
[2019-11-20 04:55:05,234 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@229770c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 04:55:05, skipping insertion in model container
[2019-11-20 04:55:05,234 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 04:55:05" (3/3) ...
[2019-11-20 04:55:05,238 INFO  L109   eAbstractionObserver]: Analyzing ICFG splice-2.i
[2019-11-20 04:55:05,248 INFO  L153   ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2019-11-20 04:55:05,271 INFO  L165   ceAbstractionStarter]: Appying trace abstraction to program that has 29 error locations.
[2019-11-20 04:55:05,282 INFO  L249      AbstractCegarLoop]: Starting to check reachability of 29 error locations.
[2019-11-20 04:55:05,303 INFO  L373      AbstractCegarLoop]: Interprodecural is true
[2019-11-20 04:55:05,303 INFO  L374      AbstractCegarLoop]: Hoare is false
[2019-11-20 04:55:05,303 INFO  L375      AbstractCegarLoop]: Compute interpolants for FPandBP
[2019-11-20 04:55:05,303 INFO  L376      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2019-11-20 04:55:05,303 INFO  L377      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2019-11-20 04:55:05,303 INFO  L378      AbstractCegarLoop]: Difference is false
[2019-11-20 04:55:05,304 INFO  L379      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2019-11-20 04:55:05,304 INFO  L383      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2019-11-20 04:55:05,327 INFO  L276                IsEmpty]: Start isEmpty. Operand 82 states.
[2019-11-20 04:55:05,336 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 11
[2019-11-20 04:55:05,336 INFO  L402         BasicCegarLoop]: Found error trace
[2019-11-20 04:55:05,337 INFO  L410         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-11-20 04:55:05,337 INFO  L410      AbstractCegarLoop]: === Iteration 1 === [mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr27REQUIRES_VIOLATION, mainErr26REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr24REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr25REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr21REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr23REQUIRES_VIOLATION, mainErr22REQUIRES_VIOLATION, mainErr19REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr20REQUIRES_VIOLATION, mainErr16REQUIRES_VIOLATION, mainErr17REQUIRES_VIOLATION, mainErr28ENSURES_VIOLATIONMEMORY_LEAK, mainErr13REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION]===
[2019-11-20 04:55:05,343 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-11-20 04:55:05,343 INFO  L82        PathProgramCache]: Analyzing trace with hash -1307018201, now seen corresponding path program 1 times
[2019-11-20 04:55:05,354 INFO  L163   FreeRefinementEngine]: Executing refinement strategy WOLF
[2019-11-20 04:55:05,355 INFO  L348   FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [78088534]
[2019-11-20 04:55:05,355 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2f0b9410-16af-4a94-ac63-e0473ba4b589/bin/uautomizer/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
[2019-11-20 04:55:05,578 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-20 04:55:05,581 INFO  L255         TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 4 conjunts are in the unsatisfiable core
[2019-11-20 04:55:05,587 INFO  L278         TraceCheckSpWp]: Computing forward predicates...
[2019-11-20 04:55:05,660 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
[2019-11-20 04:55:05,660 INFO  L496         ElimStorePlain]: Start of recursive call 2:  End of recursive call:  and 1 xjuncts.
[2019-11-20 04:55:05,668 INFO  L567         ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size
[2019-11-20 04:55:05,668 INFO  L496         ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars,  End of recursive call:  and 1 xjuncts.
[2019-11-20 04:55:05,668 INFO  L221         ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5
[2019-11-20 04:55:05,693 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-11-20 04:55:05,693 INFO  L320         TraceCheckSpWp]: Computing backward predicates...
[2019-11-20 04:55:05,704 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-11-20 04:55:05,705 INFO  L348   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [78088534]
[2019-11-20 04:55:05,706 INFO  L220   FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences.
[2019-11-20 04:55:05,706 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3
[2019-11-20 04:55:05,707 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96948620]
[2019-11-20 04:55:05,712 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 4 states
[2019-11-20 04:55:05,712 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF
[2019-11-20 04:55:05,727 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2019-11-20 04:55:05,728 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2019-11-20 04:55:05,731 INFO  L87              Difference]: Start difference. First operand 82 states. Second operand 4 states.
[2019-11-20 04:55:06,115 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-11-20 04:55:06,115 INFO  L93              Difference]: Finished difference Result 89 states and 100 transitions.
[2019-11-20 04:55:06,116 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2019-11-20 04:55:06,117 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 10
[2019-11-20 04:55:06,118 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-11-20 04:55:06,131 INFO  L225             Difference]: With dead ends: 89
[2019-11-20 04:55:06,132 INFO  L226             Difference]: Without dead ends: 80
[2019-11-20 04:55:06,134 INFO  L630         BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2019-11-20 04:55:06,153 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 80 states.
[2019-11-20 04:55:06,194 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 74.
[2019-11-20 04:55:06,196 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 74 states.
[2019-11-20 04:55:06,203 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 86 transitions.
[2019-11-20 04:55:06,204 INFO  L78                 Accepts]: Start accepts. Automaton has 74 states and 86 transitions. Word has length 10
[2019-11-20 04:55:06,204 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-11-20 04:55:06,204 INFO  L462      AbstractCegarLoop]: Abstraction has 74 states and 86 transitions.
[2019-11-20 04:55:06,205 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2019-11-20 04:55:06,205 INFO  L276                IsEmpty]: Start isEmpty. Operand 74 states and 86 transitions.
[2019-11-20 04:55:06,205 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 11
[2019-11-20 04:55:06,206 INFO  L402         BasicCegarLoop]: Found error trace
[2019-11-20 04:55:06,207 INFO  L410         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-11-20 04:55:06,409 WARN  L499      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 cvc4 --incremental --print-success --lang smt --rewrite-divk
[2019-11-20 04:55:06,409 INFO  L410      AbstractCegarLoop]: === Iteration 2 === [mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr27REQUIRES_VIOLATION, mainErr26REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr24REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr25REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr21REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr23REQUIRES_VIOLATION, mainErr22REQUIRES_VIOLATION, mainErr19REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr20REQUIRES_VIOLATION, mainErr16REQUIRES_VIOLATION, mainErr17REQUIRES_VIOLATION, mainErr28ENSURES_VIOLATIONMEMORY_LEAK, mainErr13REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION]===
[2019-11-20 04:55:06,410 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-11-20 04:55:06,410 INFO  L82        PathProgramCache]: Analyzing trace with hash -1307018200, now seen corresponding path program 1 times
[2019-11-20 04:55:06,410 INFO  L163   FreeRefinementEngine]: Executing refinement strategy WOLF
[2019-11-20 04:55:06,410 INFO  L348   FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1281025579]
[2019-11-20 04:55:06,411 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2f0b9410-16af-4a94-ac63-e0473ba4b589/bin/uautomizer/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
[2019-11-20 04:55:06,590 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-20 04:55:06,592 INFO  L255         TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 7 conjunts are in the unsatisfiable core
[2019-11-20 04:55:06,593 INFO  L278         TraceCheckSpWp]: Computing forward predicates...
[2019-11-20 04:55:06,608 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
[2019-11-20 04:55:06,608 INFO  L496         ElimStorePlain]: Start of recursive call 2:  End of recursive call:  and 1 xjuncts.
[2019-11-20 04:55:06,614 INFO  L567         ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size
[2019-11-20 04:55:06,615 INFO  L496         ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars,  End of recursive call:  and 1 xjuncts.
[2019-11-20 04:55:06,615 INFO  L221         ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9
[2019-11-20 04:55:06,645 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-11-20 04:55:06,645 INFO  L320         TraceCheckSpWp]: Computing backward predicates...
[2019-11-20 04:55:06,752 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-11-20 04:55:06,753 INFO  L348   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1281025579]
[2019-11-20 04:55:06,753 INFO  L220   FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences.
[2019-11-20 04:55:06,753 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5
[2019-11-20 04:55:06,753 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580054404]
[2019-11-20 04:55:06,754 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 6 states
[2019-11-20 04:55:06,755 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF
[2019-11-20 04:55:06,755 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2019-11-20 04:55:06,755 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30
[2019-11-20 04:55:06,755 INFO  L87              Difference]: Start difference. First operand 74 states and 86 transitions. Second operand 6 states.
[2019-11-20 04:55:07,309 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-11-20 04:55:07,309 INFO  L93              Difference]: Finished difference Result 90 states and 98 transitions.
[2019-11-20 04:55:07,310 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2019-11-20 04:55:07,310 INFO  L78                 Accepts]: Start accepts. Automaton has 6 states. Word has length 10
[2019-11-20 04:55:07,311 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-11-20 04:55:07,312 INFO  L225             Difference]: With dead ends: 90
[2019-11-20 04:55:07,312 INFO  L226             Difference]: Without dead ends: 90
[2019-11-20 04:55:07,313 INFO  L630         BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56
[2019-11-20 04:55:07,313 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 90 states.
[2019-11-20 04:55:07,319 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 81.
[2019-11-20 04:55:07,320 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 81 states.
[2019-11-20 04:55:07,321 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 90 transitions.
[2019-11-20 04:55:07,322 INFO  L78                 Accepts]: Start accepts. Automaton has 81 states and 90 transitions. Word has length 10
[2019-11-20 04:55:07,322 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-11-20 04:55:07,322 INFO  L462      AbstractCegarLoop]: Abstraction has 81 states and 90 transitions.
[2019-11-20 04:55:07,322 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 6 states.
[2019-11-20 04:55:07,323 INFO  L276                IsEmpty]: Start isEmpty. Operand 81 states and 90 transitions.
[2019-11-20 04:55:07,323 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 14
[2019-11-20 04:55:07,323 INFO  L402         BasicCegarLoop]: Found error trace
[2019-11-20 04:55:07,324 INFO  L410         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-11-20 04:55:07,527 WARN  L499      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 cvc4 --incremental --print-success --lang smt --rewrite-divk
[2019-11-20 04:55:07,527 INFO  L410      AbstractCegarLoop]: === Iteration 3 === [mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr27REQUIRES_VIOLATION, mainErr26REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr24REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr25REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr21REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr23REQUIRES_VIOLATION, mainErr22REQUIRES_VIOLATION, mainErr19REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr20REQUIRES_VIOLATION, mainErr16REQUIRES_VIOLATION, mainErr17REQUIRES_VIOLATION, mainErr28ENSURES_VIOLATIONMEMORY_LEAK, mainErr13REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION]===
[2019-11-20 04:55:07,528 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-11-20 04:55:07,528 INFO  L82        PathProgramCache]: Analyzing trace with hash 794315540, now seen corresponding path program 1 times
[2019-11-20 04:55:07,528 INFO  L163   FreeRefinementEngine]: Executing refinement strategy WOLF
[2019-11-20 04:55:07,528 INFO  L348   FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1689244334]
[2019-11-20 04:55:07,529 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2f0b9410-16af-4a94-ac63-e0473ba4b589/bin/uautomizer/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
[2019-11-20 04:55:07,713 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is sat
[2019-11-20 04:55:07,760 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is sat
[2019-11-20 04:55:07,778 INFO  L174   FreeRefinementEngine]: Strategy WOLF found a feasible trace
[2019-11-20 04:55:07,778 INFO  L475         BasicCegarLoop]: Counterexample might be feasible
[2019-11-20 04:55:07,979 WARN  L499      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 cvc4 --incremental --print-success --lang smt --rewrite-divk
[2019-11-20 04:55:07,988 WARN  L417   cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true)
[2019-11-20 04:55:08,000 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.11 04:55:08 BoogieIcfgContainer
[2019-11-20 04:55:08,000 INFO  L132        PluginConnector]: ------------------------ END TraceAbstraction----------------------------
[2019-11-20 04:55:08,000 INFO  L113        PluginConnector]: ------------------------Witness Printer----------------------------
[2019-11-20 04:55:08,000 INFO  L271        PluginConnector]: Initializing Witness Printer...
[2019-11-20 04:55:08,001 INFO  L275        PluginConnector]: Witness Printer initialized
[2019-11-20 04:55:08,001 INFO  L185        PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 04:55:05" (3/4) ...
[2019-11-20 04:55:08,004 INFO  L140         WitnessPrinter]: No result that supports witness generation found
[2019-11-20 04:55:08,004 INFO  L132        PluginConnector]: ------------------------ END Witness Printer----------------------------
[2019-11-20 04:55:08,006 INFO  L168              Benchmark]: Toolchain (without parser) took 4404.11 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 142.1 MB). Free memory was 944.7 MB in the beginning and 882.0 MB in the end (delta: 62.7 MB). Peak memory consumption was 204.8 MB. Max. memory is 11.5 GB.
[2019-11-20 04:55:08,006 INFO  L168              Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB.
[2019-11-20 04:55:08,007 INFO  L168              Benchmark]: CACSL2BoogieTranslator took 589.94 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 142.1 MB). Free memory was 944.7 MB in the beginning and 1.1 GB in the end (delta: -172.4 MB). Peak memory consumption was 17.9 MB. Max. memory is 11.5 GB.
[2019-11-20 04:55:08,008 INFO  L168              Benchmark]: Boogie Preprocessor took 83.35 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: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 11.5 GB.
[2019-11-20 04:55:08,008 INFO  L168              Benchmark]: RCFGBuilder took 952.16 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: 63.9 MB). Peak memory consumption was 63.9 MB. Max. memory is 11.5 GB.
[2019-11-20 04:55:08,009 INFO  L168              Benchmark]: TraceAbstraction took 2770.96 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 882.0 MB in the end (delta: 169.5 MB). Peak memory consumption was 169.5 MB. Max. memory is 11.5 GB.
[2019-11-20 04:55:08,009 INFO  L168              Benchmark]: Witness Printer took 4.10 ms. Allocated memory is still 1.2 GB. Free memory is still 882.0 MB. There was no memory consumed. Max. memory is 11.5 GB.
[2019-11-20 04:55:08,012 INFO  L335   ainManager$Toolchain]: #######################  End [Toolchain 1] #######################
 --- Results ---
 * Results from de.uni_freiburg.informatik.ultimate.core:
  - StatisticsResult: Toolchain Benchmarks
    Benchmark results are:
 * CDTParser took 0.24 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB.
 * CACSL2BoogieTranslator took 589.94 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 142.1 MB). Free memory was 944.7 MB in the beginning and 1.1 GB in the end (delta: -172.4 MB). Peak memory consumption was 17.9 MB. Max. memory is 11.5 GB.
 * Boogie Preprocessor took 83.35 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: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 11.5 GB.
 * RCFGBuilder took 952.16 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: 63.9 MB). Peak memory consumption was 63.9 MB. Max. memory is 11.5 GB.
 * TraceAbstraction took 2770.96 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 882.0 MB in the end (delta: 169.5 MB). Peak memory consumption was 169.5 MB. Max. memory is 11.5 GB.
 * Witness Printer took 4.10 ms. Allocated memory is still 1.2 GB. Free memory is still 882.0 MB. There was no memory consumed. Max. memory is 11.5 GB.
 * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor:
  - GenericResult: Unfinished Backtranslation
    Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true)
 * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction:
  - UnprovableResult [Line: 520]: Unable to prove that all allocated memory was freed
    Unable to prove that all allocated memory was freed
 Reason: overapproximation of memtrack at line 520. 
Possible FailurePath: 
[L521]              int flag = 1;
[L522]              List a = (List) malloc(sizeof(struct node));
        VAL         [a={-2147483648:0}, flag=1, malloc(sizeof(struct node))={-2147483648:0}]
[L523]  COND FALSE  !(a == 0)
        VAL         [a={-2147483648:0}, flag=1, malloc(sizeof(struct node))={-2147483648:0}]
[L524]              List t;
[L525]              List l1;
[L526]              List l2;
[L527]              List b;
[L528]              List u;
[L529]              List p = a;
        VAL         [a={-2147483648:0}, flag=1, malloc(sizeof(struct node))={-2147483648:0}, p={-2147483648:0}]
[L530]  COND FALSE  !(__VERIFIER_nondet_int())
[L543]              p->h = 3
        VAL         [a={-2147483648:0}, flag=1, malloc(sizeof(struct node))={-2147483648:0}, p={-2147483648:0}]
[L544]  EXPR        a->h
        VAL         [a={-2147483648:0}, a->h=3, flag=1, malloc(sizeof(struct node))={-2147483648:0}, p={-2147483648:0}]
[L544]  COND TRUE   a->h == 3
[L544]              return 0;
        VAL         [\result=0, a={-2147483648:0}, flag=1, malloc(sizeof(struct node))={-2147483648:0}, p={-2147483648:0}]

  - StatisticsResult: Ultimate Automizer benchmark data
    CFG has 9 procedures, 98 locations, 29 error locations. Result: UNSAFE, OverallTime: 2.6s, OverallIterations: 3, TraceHistogramMax: 1, AutomataDifference: 0.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 86 SDtfs, 325 SDslu, 73 SDs, 0 SdLazy, 191 SolverSat, 44 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 41 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=82occurred in iteration=0, 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, 2 MinimizatonAttempts, 15 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 33 NumberOfCodeBlocks, 33 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 36 ConstructedInterpolants, 0 QuantifiedInterpolants, 1476 SizeOfPredicates, 8 NumberOfNonLiveVariables, 80 ConjunctsInSsa, 11 ConjunctsInUnsatCore, 4 InterpolantComputations, 4 PerfectInterpolantSequences, 0/0 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 could not prove your program: unable to determine feasibility of some traces
Received shutdown request...