./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/verifythis/elimination_max_rec.c --full-output --architecture 32bit


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


Checking for memory safety (deref-memtrack)
Using default analysis
Version 6b5699aa
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_9dbbdb32-255e-4623-92c9-3b2847135084/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_9dbbdb32-255e-4623-92c9-3b2847135084/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_9dbbdb32-255e-4623-92c9-3b2847135084/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_9dbbdb32-255e-4623-92c9-3b2847135084/bin/uautomizer/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/verifythis/elimination_max_rec.c -s /tmp/vcloud-vcloud-master/worker/run_dir_9dbbdb32-255e-4623-92c9-3b2847135084/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_9dbbdb32-255e-4623-92c9-3b2847135084/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 17d20a29a9e9cc6560e9aa0daac36f5de29f992c
.......................................................................................................................................................................................................................................................................................................................................................................................................................................................
Execution finished normally
Writing output log to file Ultimate.log
Writing human readable error path to file UltimateCounterExample.errorpath
Result:
FALSE(valid-deref)
--- Real Ultimate output ---
Skipped default analysis because property is memsafety

### Bit-precise run ###
This is Ultimate 0.1.24-6b5699a
[2019-11-25 08:50:55,665 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2019-11-25 08:50:55,666 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2019-11-25 08:50:55,683 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2019-11-25 08:50:55,684 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2019-11-25 08:50:55,685 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2019-11-25 08:50:55,687 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2019-11-25 08:50:55,696 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2019-11-25 08:50:55,702 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2019-11-25 08:50:55,705 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
[2019-11-25 08:50:55,706 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
[2019-11-25 08:50:55,707 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2019-11-25 08:50:55,707 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2019-11-25 08:50:55,708 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2019-11-25 08:50:55,709 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2019-11-25 08:50:55,710 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2019-11-25 08:50:55,711 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2019-11-25 08:50:55,712 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2019-11-25 08:50:55,713 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2019-11-25 08:50:55,719 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2019-11-25 08:50:55,723 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2019-11-25 08:50:55,727 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2019-11-25 08:50:55,728 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2019-11-25 08:50:55,729 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2019-11-25 08:50:55,731 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2019-11-25 08:50:55,732 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2019-11-25 08:50:55,732 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2019-11-25 08:50:55,733 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2019-11-25 08:50:55,734 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2019-11-25 08:50:55,735 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2019-11-25 08:50:55,735 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2019-11-25 08:50:55,736 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2019-11-25 08:50:55,736 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2019-11-25 08:50:55,738 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2019-11-25 08:50:55,739 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2019-11-25 08:50:55,739 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
[2019-11-25 08:50:55,740 INFO  L184        SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2019-11-25 08:50:55,740 INFO  L184        SettingsManager]: ReqParser provides no preferences, ignoring...
[2019-11-25 08:50:55,740 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
[2019-11-25 08:50:55,741 INFO  L181        SettingsManager]: Resetting Witness Parser preferences to default values
[2019-11-25 08:50:55,742 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2019-11-25 08:50:55,743 INFO  L101        SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_9dbbdb32-255e-4623-92c9-3b2847135084/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf
[2019-11-25 08:50:55,770 INFO  L113        SettingsManager]: Loading preferences was successful
[2019-11-25 08:50:55,770 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2019-11-25 08:50:55,771 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2019-11-25 08:50:55,771 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2019-11-25 08:50:55,771 INFO  L138        SettingsManager]:  * Use SBE=true
[2019-11-25 08:50:55,771 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2019-11-25 08:50:55,772 INFO  L138        SettingsManager]:  * sizeof long=4
[2019-11-25 08:50:55,772 INFO  L138        SettingsManager]:  * Check unreachability of error function in SV-COMP mode=false
[2019-11-25 08:50:55,772 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2019-11-25 08:50:55,772 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2019-11-25 08:50:55,772 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2019-11-25 08:50:55,773 INFO  L138        SettingsManager]:  * Check for the main procedure if all allocated memory was freed=true
[2019-11-25 08:50:55,773 INFO  L138        SettingsManager]:  * Bitprecise bitfields=true
[2019-11-25 08:50:55,773 INFO  L138        SettingsManager]:  * SV-COMP memtrack compatibility mode=true
[2019-11-25 08:50:55,773 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2019-11-25 08:50:55,773 INFO  L138        SettingsManager]:  * Adapt memory model on pointer casts if necessary=true
[2019-11-25 08:50:55,774 INFO  L138        SettingsManager]:  * Use bitvectors instead of ints=true
[2019-11-25 08:50:55,774 INFO  L138        SettingsManager]:  * Memory model=HoenickeLindenmann_4ByteResolution
[2019-11-25 08:50:55,774 INFO  L138        SettingsManager]:  * sizeof long double=12
[2019-11-25 08:50:55,774 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2019-11-25 08:50:55,775 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2019-11-25 08:50:55,775 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2019-11-25 08:50:55,775 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2019-11-25 08:50:55,775 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2019-11-25 08:50:55,775 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2019-11-25 08:50:55,776 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2019-11-25 08:50:55,776 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2019-11-25 08:50:55,776 INFO  L138        SettingsManager]:  * Trace refinement strategy=WOLF
[2019-11-25 08:50:55,776 INFO  L138        SettingsManager]:  * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt
[2019-11-25 08:50:55,776 INFO  L138        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2019-11-25 08:50:55,777 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_9dbbdb32-255e-4623-92c9-3b2847135084/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 -> 17d20a29a9e9cc6560e9aa0daac36f5de29f992c
[2019-11-25 08:50:55,971 INFO  L81    nceAwareModelManager]: Repository-Root is: /tmp
[2019-11-25 08:50:55,988 INFO  L258   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2019-11-25 08:50:55,992 INFO  L214   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2019-11-25 08:50:55,994 INFO  L271        PluginConnector]: Initializing CDTParser...
[2019-11-25 08:50:55,994 INFO  L275        PluginConnector]: CDTParser initialized
[2019-11-25 08:50:55,996 INFO  L428   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_9dbbdb32-255e-4623-92c9-3b2847135084/bin/uautomizer/../../sv-benchmarks/c/verifythis/elimination_max_rec.c
[2019-11-25 08:50:56,062 INFO  L220              CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_9dbbdb32-255e-4623-92c9-3b2847135084/bin/uautomizer/data/511a1e5ed/8106e034d224472a90655ad7ff8b6e84/FLAG72b63586b
[2019-11-25 08:50:56,467 INFO  L306              CDTParser]: Found 1 translation units.
[2019-11-25 08:50:56,467 INFO  L160              CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_9dbbdb32-255e-4623-92c9-3b2847135084/sv-benchmarks/c/verifythis/elimination_max_rec.c
[2019-11-25 08:50:56,474 INFO  L349              CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_9dbbdb32-255e-4623-92c9-3b2847135084/bin/uautomizer/data/511a1e5ed/8106e034d224472a90655ad7ff8b6e84/FLAG72b63586b
[2019-11-25 08:50:56,859 INFO  L357              CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_9dbbdb32-255e-4623-92c9-3b2847135084/bin/uautomizer/data/511a1e5ed/8106e034d224472a90655ad7ff8b6e84
[2019-11-25 08:50:56,862 INFO  L296   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2019-11-25 08:50:56,863 INFO  L131        ToolchainWalker]: Walking toolchain with 5 elements.
[2019-11-25 08:50:56,864 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2019-11-25 08:50:56,864 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2019-11-25 08:50:56,867 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2019-11-25 08:50:56,868 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:50:56" (1/1) ...
[2019-11-25 08:50:56,870 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5422e48e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:50:56, skipping insertion in model container
[2019-11-25 08:50:56,870 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:50:56" (1/1) ...
[2019-11-25 08:50:56,877 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2019-11-25 08:50:56,898 INFO  L179         MainTranslator]: Built tables and reachable declarations
[2019-11-25 08:50:57,117 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2019-11-25 08:50:57,136 INFO  L201         MainTranslator]: Completed pre-run
[2019-11-25 08:50:57,156 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2019-11-25 08:50:57,172 INFO  L205         MainTranslator]: Completed translation
[2019-11-25 08:50:57,173 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:50:57 WrapperNode
[2019-11-25 08:50:57,173 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2019-11-25 08:50:57,174 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2019-11-25 08:50:57,174 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2019-11-25 08:50:57,174 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2019-11-25 08:50:57,187 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:50:57" (1/1) ...
[2019-11-25 08:50:57,187 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:50:57" (1/1) ...
[2019-11-25 08:50:57,196 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:50:57" (1/1) ...
[2019-11-25 08:50:57,196 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:50:57" (1/1) ...
[2019-11-25 08:50:57,206 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:50:57" (1/1) ...
[2019-11-25 08:50:57,208 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:50:57" (1/1) ...
[2019-11-25 08:50:57,209 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:50:57" (1/1) ...
[2019-11-25 08:50:57,212 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2019-11-25 08:50:57,213 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2019-11-25 08:50:57,213 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2019-11-25 08:50:57,213 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2019-11-25 08:50:57,214 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:50:57" (1/1) ...
No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9dbbdb32-255e-4623-92c9-3b2847135084/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
[2019-11-25 08:50:57,273 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2019-11-25 08:50:57,273 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2019-11-25 08:50:57,274 INFO  L138     BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert
[2019-11-25 08:50:57,274 INFO  L138     BoogieDeclarations]: Found implementation of procedure check
[2019-11-25 08:50:57,274 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2019-11-25 08:50:57,274 INFO  L138     BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit
[2019-11-25 08:50:57,275 INFO  L130     BoogieDeclarations]: Found specification of procedure calloc
[2019-11-25 08:50:57,275 INFO  L130     BoogieDeclarations]: Found specification of procedure free
[2019-11-25 08:50:57,275 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2019-11-25 08:50:57,275 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_assume
[2019-11-25 08:50:57,275 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_assert
[2019-11-25 08:50:57,276 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int
[2019-11-25 08:50:57,276 INFO  L130     BoogieDeclarations]: Found specification of procedure check
[2019-11-25 08:50:57,276 INFO  L130     BoogieDeclarations]: Found specification of procedure read~intINTTYPE4
[2019-11-25 08:50:57,276 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2019-11-25 08:50:57,276 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap
[2019-11-25 08:50:57,277 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.meminit
[2019-11-25 08:50:57,277 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc
[2019-11-25 08:50:57,277 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2019-11-25 08:50:57,277 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2019-11-25 08:50:57,277 INFO  L130     BoogieDeclarations]: Found specification of procedure write~intINTTYPE4
[2019-11-25 08:50:57,671 INFO  L279             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2019-11-25 08:50:57,671 INFO  L284             CfgBuilder]: Removed 0 assume(true) statements.
[2019-11-25 08:50:57,674 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:50:57 BoogieIcfgContainer
[2019-11-25 08:50:57,675 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2019-11-25 08:50:57,676 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2019-11-25 08:50:57,676 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2019-11-25 08:50:57,678 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2019-11-25 08:50:57,679 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 08:50:56" (1/3) ...
[2019-11-25 08:50:57,679 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6659f8c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:50:57, skipping insertion in model container
[2019-11-25 08:50:57,680 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:50:57" (2/3) ...
[2019-11-25 08:50:57,680 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6659f8c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:50:57, skipping insertion in model container
[2019-11-25 08:50:57,680 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:50:57" (3/3) ...
[2019-11-25 08:50:57,682 INFO  L109   eAbstractionObserver]: Analyzing ICFG elimination_max_rec.c
[2019-11-25 08:50:57,691 INFO  L153   ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2019-11-25 08:50:57,698 INFO  L165   ceAbstractionStarter]: Appying trace abstraction to program that has 12 error locations.
[2019-11-25 08:50:57,708 INFO  L249      AbstractCegarLoop]: Starting to check reachability of 12 error locations.
[2019-11-25 08:50:57,726 INFO  L373      AbstractCegarLoop]: Interprodecural is true
[2019-11-25 08:50:57,727 INFO  L374      AbstractCegarLoop]: Hoare is false
[2019-11-25 08:50:57,727 INFO  L375      AbstractCegarLoop]: Compute interpolants for FPandBP
[2019-11-25 08:50:57,727 INFO  L376      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2019-11-25 08:50:57,727 INFO  L377      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2019-11-25 08:50:57,727 INFO  L378      AbstractCegarLoop]: Difference is false
[2019-11-25 08:50:57,728 INFO  L379      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2019-11-25 08:50:57,728 INFO  L383      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2019-11-25 08:50:57,743 INFO  L276                IsEmpty]: Start isEmpty. Operand 53 states.
[2019-11-25 08:50:57,751 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 19
[2019-11-25 08:50:57,752 INFO  L402         BasicCegarLoop]: Found error trace
[2019-11-25 08:50:57,752 INFO  L410         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-11-25 08:50:57,753 INFO  L410      AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr3ENSURES_VIOLATIONMEMORY_LEAK, mainErr1ASSERT_VIOLATIONMEMORY_FREE, checkErr2REQUIRES_VIOLATION, checkErr3REQUIRES_VIOLATION, checkErr4REQUIRES_VIOLATION, checkErr5REQUIRES_VIOLATION, checkErr0REQUIRES_VIOLATION, checkErr6REQUIRES_VIOLATION, checkErr1REQUIRES_VIOLATION, checkErr7REQUIRES_VIOLATION]===
[2019-11-25 08:50:57,758 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-11-25 08:50:57,759 INFO  L82        PathProgramCache]: Analyzing trace with hash -1758189684, now seen corresponding path program 1 times
[2019-11-25 08:50:57,769 INFO  L163   FreeRefinementEngine]: Executing refinement strategy WOLF
[2019-11-25 08:50:57,770 INFO  L348   FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1089686290]
[2019-11-25 08:50:57,770 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9dbbdb32-255e-4623-92c9-3b2847135084/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
[2019-11-25 08:50:57,901 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-25 08:50:57,905 INFO  L255         TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 3 conjunts are in the unsatisfiable core
[2019-11-25 08:50:57,913 INFO  L278         TraceCheckSpWp]: Computing forward predicates...
[2019-11-25 08:50:57,954 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-11-25 08:50:57,956 INFO  L320         TraceCheckSpWp]: Computing backward predicates...
[2019-11-25 08:50:57,981 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-11-25 08:50:57,982 INFO  L348   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1089686290]
[2019-11-25 08:50:57,983 INFO  L220   FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences.
[2019-11-25 08:50:57,983 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3
[2019-11-25 08:50:57,984 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178985796]
[2019-11-25 08:50:57,991 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 4 states
[2019-11-25 08:50:57,991 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF
[2019-11-25 08:50:58,004 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2019-11-25 08:50:58,005 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2019-11-25 08:50:58,007 INFO  L87              Difference]: Start difference. First operand 53 states. Second operand 4 states.
[2019-11-25 08:50:58,058 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-11-25 08:50:58,060 INFO  L93              Difference]: Finished difference Result 52 states and 55 transitions.
[2019-11-25 08:50:58,061 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2019-11-25 08:50:58,062 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 18
[2019-11-25 08:50:58,063 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-11-25 08:50:58,076 INFO  L225             Difference]: With dead ends: 52
[2019-11-25 08:50:58,076 INFO  L226             Difference]: Without dead ends: 49
[2019-11-25 08:50:58,078 INFO  L630         BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2019-11-25 08:50:58,096 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 49 states.
[2019-11-25 08:50:58,124 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49.
[2019-11-25 08:50:58,125 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 49 states.
[2019-11-25 08:50:58,131 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 52 transitions.
[2019-11-25 08:50:58,132 INFO  L78                 Accepts]: Start accepts. Automaton has 49 states and 52 transitions. Word has length 18
[2019-11-25 08:50:58,135 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-11-25 08:50:58,136 INFO  L462      AbstractCegarLoop]: Abstraction has 49 states and 52 transitions.
[2019-11-25 08:50:58,136 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2019-11-25 08:50:58,136 INFO  L276                IsEmpty]: Start isEmpty. Operand 49 states and 52 transitions.
[2019-11-25 08:50:58,139 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 20
[2019-11-25 08:50:58,139 INFO  L402         BasicCegarLoop]: Found error trace
[2019-11-25 08:50:58,139 INFO  L410         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-11-25 08:50:58,341 WARN  L499      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 cvc4 --incremental --print-success --lang smt --rewrite-divk
[2019-11-25 08:50:58,341 INFO  L410      AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr3ENSURES_VIOLATIONMEMORY_LEAK, mainErr1ASSERT_VIOLATIONMEMORY_FREE, checkErr2REQUIRES_VIOLATION, checkErr3REQUIRES_VIOLATION, checkErr4REQUIRES_VIOLATION, checkErr5REQUIRES_VIOLATION, checkErr0REQUIRES_VIOLATION, checkErr6REQUIRES_VIOLATION, checkErr1REQUIRES_VIOLATION, checkErr7REQUIRES_VIOLATION]===
[2019-11-25 08:50:58,342 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-11-25 08:50:58,342 INFO  L82        PathProgramCache]: Analyzing trace with hash 1330694682, now seen corresponding path program 1 times
[2019-11-25 08:50:58,343 INFO  L163   FreeRefinementEngine]: Executing refinement strategy WOLF
[2019-11-25 08:50:58,344 INFO  L348   FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [199178927]
[2019-11-25 08:50:58,344 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9dbbdb32-255e-4623-92c9-3b2847135084/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
[2019-11-25 08:50:58,458 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-25 08:50:58,459 INFO  L255         TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 4 conjunts are in the unsatisfiable core
[2019-11-25 08:50:58,461 INFO  L278         TraceCheckSpWp]: Computing forward predicates...
[2019-11-25 08:50:58,536 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-11-25 08:50:58,536 INFO  L320         TraceCheckSpWp]: Computing backward predicates...
[2019-11-25 08:50:58,585 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-11-25 08:50:58,585 INFO  L348   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [199178927]
[2019-11-25 08:50:58,585 INFO  L220   FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences.
[2019-11-25 08:50:58,585 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 3] imperfect sequences [] total 6
[2019-11-25 08:50:58,586 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733248949]
[2019-11-25 08:50:58,587 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 7 states
[2019-11-25 08:50:58,587 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF
[2019-11-25 08:50:58,587 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2019-11-25 08:50:58,588 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42
[2019-11-25 08:50:58,588 INFO  L87              Difference]: Start difference. First operand 49 states and 52 transitions. Second operand 7 states.
[2019-11-25 08:50:58,738 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-11-25 08:50:58,738 INFO  L93              Difference]: Finished difference Result 48 states and 51 transitions.
[2019-11-25 08:50:58,739 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2019-11-25 08:50:58,739 INFO  L78                 Accepts]: Start accepts. Automaton has 7 states. Word has length 19
[2019-11-25 08:50:58,739 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-11-25 08:50:58,740 INFO  L225             Difference]: With dead ends: 48
[2019-11-25 08:50:58,740 INFO  L226             Difference]: Without dead ends: 48
[2019-11-25 08:50:58,741 INFO  L630         BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56
[2019-11-25 08:50:58,742 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 48 states.
[2019-11-25 08:50:58,746 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48.
[2019-11-25 08:50:58,746 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 48 states.
[2019-11-25 08:50:58,748 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 51 transitions.
[2019-11-25 08:50:58,748 INFO  L78                 Accepts]: Start accepts. Automaton has 48 states and 51 transitions. Word has length 19
[2019-11-25 08:50:58,748 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-11-25 08:50:58,748 INFO  L462      AbstractCegarLoop]: Abstraction has 48 states and 51 transitions.
[2019-11-25 08:50:58,748 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 7 states.
[2019-11-25 08:50:58,748 INFO  L276                IsEmpty]: Start isEmpty. Operand 48 states and 51 transitions.
[2019-11-25 08:50:58,749 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 21
[2019-11-25 08:50:58,749 INFO  L402         BasicCegarLoop]: Found error trace
[2019-11-25 08:50:58,749 INFO  L410         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-11-25 08:50:58,951 WARN  L499      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 cvc4 --incremental --print-success --lang smt --rewrite-divk
[2019-11-25 08:50:58,952 INFO  L410      AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr3ENSURES_VIOLATIONMEMORY_LEAK, mainErr1ASSERT_VIOLATIONMEMORY_FREE, checkErr2REQUIRES_VIOLATION, checkErr3REQUIRES_VIOLATION, checkErr4REQUIRES_VIOLATION, checkErr5REQUIRES_VIOLATION, checkErr0REQUIRES_VIOLATION, checkErr6REQUIRES_VIOLATION, checkErr1REQUIRES_VIOLATION, checkErr7REQUIRES_VIOLATION]===
[2019-11-25 08:50:58,952 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-11-25 08:50:58,952 INFO  L82        PathProgramCache]: Analyzing trace with hash -1698137778, now seen corresponding path program 1 times
[2019-11-25 08:50:58,953 INFO  L163   FreeRefinementEngine]: Executing refinement strategy WOLF
[2019-11-25 08:50:58,953 INFO  L348   FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [933054273]
[2019-11-25 08:50:58,953 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9dbbdb32-255e-4623-92c9-3b2847135084/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
[2019-11-25 08:50:59,046 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-25 08:50:59,048 INFO  L255         TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 3 conjunts are in the unsatisfiable core
[2019-11-25 08:50:59,049 INFO  L278         TraceCheckSpWp]: Computing forward predicates...
[2019-11-25 08:50:59,088 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
[2019-11-25 08:50:59,090 INFO  L496         ElimStorePlain]: Start of recursive call 2:  End of recursive call:  and 1 xjuncts.
[2019-11-25 08:50:59,099 INFO  L567         ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size
[2019-11-25 08:50:59,099 INFO  L496         ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars,  End of recursive call:  and 1 xjuncts.
[2019-11-25 08:50:59,100 INFO  L221         ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5
[2019-11-25 08:50:59,163 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-11-25 08:50:59,164 INFO  L320         TraceCheckSpWp]: Computing backward predicates...
[2019-11-25 08:50:59,184 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-11-25 08:50:59,184 INFO  L348   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [933054273]
[2019-11-25 08:50:59,185 INFO  L220   FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences.
[2019-11-25 08:50:59,185 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 3] imperfect sequences [] total 4
[2019-11-25 08:50:59,185 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320613517]
[2019-11-25 08:50:59,185 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 5 states
[2019-11-25 08:50:59,186 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF
[2019-11-25 08:50:59,186 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2019-11-25 08:50:59,186 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2019-11-25 08:50:59,186 INFO  L87              Difference]: Start difference. First operand 48 states and 51 transitions. Second operand 5 states.
[2019-11-25 08:50:59,331 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-11-25 08:50:59,331 INFO  L93              Difference]: Finished difference Result 47 states and 50 transitions.
[2019-11-25 08:50:59,332 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2019-11-25 08:50:59,333 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 20
[2019-11-25 08:50:59,333 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-11-25 08:50:59,334 INFO  L225             Difference]: With dead ends: 47
[2019-11-25 08:50:59,334 INFO  L226             Difference]: Without dead ends: 47
[2019-11-25 08:50:59,334 INFO  L630         BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 32 SyntacticMatches, 4 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30
[2019-11-25 08:50:59,334 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 47 states.
[2019-11-25 08:50:59,337 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47.
[2019-11-25 08:50:59,337 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 47 states.
[2019-11-25 08:50:59,338 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 50 transitions.
[2019-11-25 08:50:59,338 INFO  L78                 Accepts]: Start accepts. Automaton has 47 states and 50 transitions. Word has length 20
[2019-11-25 08:50:59,338 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-11-25 08:50:59,339 INFO  L462      AbstractCegarLoop]: Abstraction has 47 states and 50 transitions.
[2019-11-25 08:50:59,339 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2019-11-25 08:50:59,339 INFO  L276                IsEmpty]: Start isEmpty. Operand 47 states and 50 transitions.
[2019-11-25 08:50:59,339 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 22
[2019-11-25 08:50:59,339 INFO  L402         BasicCegarLoop]: Found error trace
[2019-11-25 08:50:59,339 INFO  L410         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-11-25 08:50:59,540 WARN  L499      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 cvc4 --incremental --print-success --lang smt --rewrite-divk
[2019-11-25 08:50:59,540 INFO  L410      AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr3ENSURES_VIOLATIONMEMORY_LEAK, mainErr1ASSERT_VIOLATIONMEMORY_FREE, checkErr2REQUIRES_VIOLATION, checkErr3REQUIRES_VIOLATION, checkErr4REQUIRES_VIOLATION, checkErr5REQUIRES_VIOLATION, checkErr0REQUIRES_VIOLATION, checkErr6REQUIRES_VIOLATION, checkErr1REQUIRES_VIOLATION, checkErr7REQUIRES_VIOLATION]===
[2019-11-25 08:50:59,541 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-11-25 08:50:59,541 INFO  L82        PathProgramCache]: Analyzing trace with hash 886846262, now seen corresponding path program 1 times
[2019-11-25 08:50:59,541 INFO  L163   FreeRefinementEngine]: Executing refinement strategy WOLF
[2019-11-25 08:50:59,542 INFO  L348   FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1742754110]
[2019-11-25 08:50:59,542 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9dbbdb32-255e-4623-92c9-3b2847135084/bin/uautomizer/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
[2019-11-25 08:50:59,632 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-25 08:50:59,633 INFO  L255         TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 5 conjunts are in the unsatisfiable core
[2019-11-25 08:50:59,635 INFO  L278         TraceCheckSpWp]: Computing forward predicates...
[2019-11-25 08:50:59,650 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
[2019-11-25 08:50:59,651 INFO  L496         ElimStorePlain]: Start of recursive call 2:  End of recursive call:  and 1 xjuncts.
[2019-11-25 08:50:59,658 INFO  L567         ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size
[2019-11-25 08:50:59,658 INFO  L496         ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars,  End of recursive call:  and 1 xjuncts.
[2019-11-25 08:50:59,658 INFO  L221         ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5
[2019-11-25 08:50:59,739 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-11-25 08:50:59,739 INFO  L320         TraceCheckSpWp]: Computing backward predicates...
[2019-11-25 08:50:59,759 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-11-25 08:50:59,759 INFO  L348   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1742754110]
[2019-11-25 08:50:59,759 INFO  L220   FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences.
[2019-11-25 08:50:59,759 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 5] imperfect sequences [] total 6
[2019-11-25 08:50:59,760 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037876943]
[2019-11-25 08:50:59,760 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 7 states
[2019-11-25 08:50:59,760 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF
[2019-11-25 08:50:59,760 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2019-11-25 08:50:59,761 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42
[2019-11-25 08:50:59,761 INFO  L87              Difference]: Start difference. First operand 47 states and 50 transitions. Second operand 7 states.
[2019-11-25 08:51:00,006 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-11-25 08:51:00,007 INFO  L93              Difference]: Finished difference Result 43 states and 46 transitions.
[2019-11-25 08:51:00,007 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2019-11-25 08:51:00,008 INFO  L78                 Accepts]: Start accepts. Automaton has 7 states. Word has length 21
[2019-11-25 08:51:00,008 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-11-25 08:51:00,009 INFO  L225             Difference]: With dead ends: 43
[2019-11-25 08:51:00,009 INFO  L226             Difference]: Without dead ends: 43
[2019-11-25 08:51:00,009 INFO  L630         BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 32 SyntacticMatches, 4 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72
[2019-11-25 08:51:00,010 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 43 states.
[2019-11-25 08:51:00,013 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43.
[2019-11-25 08:51:00,013 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 43 states.
[2019-11-25 08:51:00,015 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 46 transitions.
[2019-11-25 08:51:00,015 INFO  L78                 Accepts]: Start accepts. Automaton has 43 states and 46 transitions. Word has length 21
[2019-11-25 08:51:00,015 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-11-25 08:51:00,015 INFO  L462      AbstractCegarLoop]: Abstraction has 43 states and 46 transitions.
[2019-11-25 08:51:00,016 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 7 states.
[2019-11-25 08:51:00,016 INFO  L276                IsEmpty]: Start isEmpty. Operand 43 states and 46 transitions.
[2019-11-25 08:51:00,016 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 22
[2019-11-25 08:51:00,017 INFO  L402         BasicCegarLoop]: Found error trace
[2019-11-25 08:51:00,017 INFO  L410         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-11-25 08:51:00,217 WARN  L499      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 cvc4 --incremental --print-success --lang smt --rewrite-divk
[2019-11-25 08:51:00,218 INFO  L410      AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr3ENSURES_VIOLATIONMEMORY_LEAK, mainErr1ASSERT_VIOLATIONMEMORY_FREE, checkErr2REQUIRES_VIOLATION, checkErr3REQUIRES_VIOLATION, checkErr4REQUIRES_VIOLATION, checkErr5REQUIRES_VIOLATION, checkErr0REQUIRES_VIOLATION, checkErr6REQUIRES_VIOLATION, checkErr1REQUIRES_VIOLATION, checkErr7REQUIRES_VIOLATION]===
[2019-11-25 08:51:00,218 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-11-25 08:51:00,218 INFO  L82        PathProgramCache]: Analyzing trace with hash 886846263, now seen corresponding path program 1 times
[2019-11-25 08:51:00,218 INFO  L163   FreeRefinementEngine]: Executing refinement strategy WOLF
[2019-11-25 08:51:00,219 INFO  L348   FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1576710287]
[2019-11-25 08:51:00,219 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9dbbdb32-255e-4623-92c9-3b2847135084/bin/uautomizer/cvc4
Starting monitored process 6 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 6 with cvc4 --incremental --print-success --lang smt --rewrite-divk
[2019-11-25 08:51:00,337 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is sat
[2019-11-25 08:51:00,407 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is sat
[2019-11-25 08:51:00,430 INFO  L174   FreeRefinementEngine]: Strategy WOLF found a feasible trace
[2019-11-25 08:51:00,431 INFO  L475         BasicCegarLoop]: Counterexample might be feasible
[2019-11-25 08:51:00,642 WARN  L499      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 cvc4 --incremental --print-success --lang smt --rewrite-divk
[2019-11-25 08:51:00,666 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.11 08:51:00 BoogieIcfgContainer
[2019-11-25 08:51:00,666 INFO  L132        PluginConnector]: ------------------------ END TraceAbstraction----------------------------
[2019-11-25 08:51:00,666 INFO  L113        PluginConnector]: ------------------------Witness Printer----------------------------
[2019-11-25 08:51:00,667 INFO  L271        PluginConnector]: Initializing Witness Printer...
[2019-11-25 08:51:00,667 INFO  L275        PluginConnector]: Witness Printer initialized
[2019-11-25 08:51:00,667 INFO  L185        PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:50:57" (3/4) ...
[2019-11-25 08:51:00,670 INFO  L131         WitnessPrinter]: Generating witness for reachability counterexample
[2019-11-25 08:51:00,712 INFO  L141         WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_9dbbdb32-255e-4623-92c9-3b2847135084/bin/uautomizer/witness.graphml
[2019-11-25 08:51:00,712 INFO  L132        PluginConnector]: ------------------------ END Witness Printer----------------------------
[2019-11-25 08:51:00,714 INFO  L168              Benchmark]: Toolchain (without parser) took 3850.81 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 160.4 MB). Free memory was 951.4 MB in the beginning and 966.9 MB in the end (delta: -15.5 MB). Peak memory consumption was 145.0 MB. Max. memory is 11.5 GB.
[2019-11-25 08:51:00,714 INFO  L168              Benchmark]: CDTParser took 0.22 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.
[2019-11-25 08:51:00,715 INFO  L168              Benchmark]: CACSL2BoogieTranslator took 309.73 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 160.4 MB). Free memory was 951.4 MB in the beginning and 1.2 GB in the end (delta: -203.9 MB). Peak memory consumption was 22.8 MB. Max. memory is 11.5 GB.
[2019-11-25 08:51:00,715 INFO  L168              Benchmark]: Boogie Preprocessor took 38.94 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB.
[2019-11-25 08:51:00,716 INFO  L168              Benchmark]: RCFGBuilder took 461.76 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 29.1 MB). Peak memory consumption was 29.1 MB. Max. memory is 11.5 GB.
[2019-11-25 08:51:00,716 INFO  L168              Benchmark]: TraceAbstraction took 2990.49 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 966.9 MB in the end (delta: 159.4 MB). Peak memory consumption was 159.4 MB. Max. memory is 11.5 GB.
[2019-11-25 08:51:00,717 INFO  L168              Benchmark]: Witness Printer took 45.87 ms. Allocated memory is still 1.2 GB. Free memory is still 966.9 MB. There was no memory consumed. Max. memory is 11.5 GB.
[2019-11-25 08:51:00,719 INFO  L335   ainManager$Toolchain]: #######################  End [Toolchain 1] #######################
 --- Results ---
 * Results from de.uni_freiburg.informatik.ultimate.core:
  - StatisticsResult: Toolchain Benchmarks
    Benchmark results are:
 * CDTParser took 0.22 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 309.73 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 160.4 MB). Free memory was 951.4 MB in the beginning and 1.2 GB in the end (delta: -203.9 MB). Peak memory consumption was 22.8 MB. Max. memory is 11.5 GB.
 * Boogie Preprocessor took 38.94 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB.
 * RCFGBuilder took 461.76 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 29.1 MB). Peak memory consumption was 29.1 MB. Max. memory is 11.5 GB.
 * TraceAbstraction took 2990.49 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 966.9 MB in the end (delta: 159.4 MB). Peak memory consumption was 159.4 MB. Max. memory is 11.5 GB.
 * Witness Printer took 45.87 ms. Allocated memory is still 1.2 GB. Free memory is still 966.9 MB. There was no memory consumed. Max. memory is 11.5 GB.
 * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction:
  - CounterExampleResult [Line: 20]: pointer dereference may fail
    pointer dereference may fail
We found a FailurePath: 
[L37]               int n = __VERIFIER_nondet_int();
[L40]  EXPR, FCALL  calloc(n, sizeof(int))
       VAL          [calloc(n, sizeof(int))={1:0}, n=1073741823]
[L40]               int *a = calloc(n, sizeof(int));
       VAL          [a={1:0}, calloc(n, sizeof(int))={1:0}, n=1073741823]
[L41]  CALL         check(0, n-1, a, n)
       VAL          [\old(n)=1073741823, \old(x)=0, \old(y)=1073741822, a={1:0}]
[L12]  COND FALSE   !(x >= y)
       VAL          [\old(n)=1073741823, \old(x)=0, \old(y)=1073741822, a={1:0}, a={1:0}, n=1073741823, x=0, y=1073741822]
[L15]  CALL         __VERIFIER_assert(0 <= x && y < n)
       VAL          [\old(cond)=1]
[L6]   COND FALSE   !(!cond)
       VAL          [\old(cond)=1, cond=1]
[L15]  RET          __VERIFIER_assert(0 <= x && y < n)
       VAL          [\old(n)=1073741823, \old(x)=0, \old(y)=1073741822, a={1:0}, a={1:0}, n=1073741823, x=0, y=1073741822]
[L17]               int x0 = x;
[L18]               int y0 = y;
       VAL          [\old(n)=1073741823, \old(x)=0, \old(y)=1073741822, a={1:0}, a={1:0}, n=1073741823, x=0, x0=0, y=1073741822, y0=1073741822]
[L20]               a[x]

  - StatisticsResult: Ultimate Automizer benchmark data
    CFG has 6 procedures, 53 locations, 12 error locations. Result: UNSAFE, OverallTime: 2.9s, OverallIterations: 5, TraceHistogramMax: 1, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 163 SDtfs, 156 SDslu, 317 SDs, 0 SdLazy, 193 SolverSat, 20 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 157 GetRequests, 127 SyntacticMatches, 10 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=53occurred 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, 4 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 99 NumberOfCodeBlocks, 99 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 148 ConstructedInterpolants, 14 QuantifiedInterpolants, 9415 SizeOfPredicates, 5 NumberOfNonLiveVariables, 249 ConjunctsInSsa, 15 ConjunctsInUnsatCore, 8 InterpolantComputations, 8 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 proved your program to be incorrect!
Received shutdown request...