./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/list-ext3-properties/sll_length_check_false-unreach-call_false-valid-memcleanup.i --full-output --architecture 32bit


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


Checking for ERROR reachability
Using default analysis
Version 0cd3be1d
Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_1eda1bcd-50bf-46ed-bcde-ee4df3fa9761/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_1eda1bcd-50bf-46ed-bcde-ee4df3fa9761/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_1eda1bcd-50bf-46ed-bcde-ee4df3fa9761/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_1eda1bcd-50bf-46ed-bcde-ee4df3fa9761/bin-2019/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/list-ext3-properties/sll_length_check_false-unreach-call_false-valid-memcleanup.i -s /tmp/vcloud-vcloud-master/worker/working_dir_1eda1bcd-50bf-46ed-bcde-ee4df3fa9761/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_1eda1bcd-50bf-46ed-bcde-ee4df3fa9761/bin-2019/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) )

 --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 2a99c5e1922c5e2d2ce50e982def02dab2dbd81e
...................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................
Execution finished normally
Writing output log to file Ultimate.log
Writing human readable error path to file UltimateCounterExample.errorpath
Result:
FALSE
--- Real Ultimate output ---
This is Ultimate 0.1.23-0cd3be1
[2018-11-28 12:31:19,997 INFO  L170        SettingsManager]: Resetting all preferences to default values...
[2018-11-28 12:31:19,998 INFO  L174        SettingsManager]: Resetting UltimateCore preferences to default values
[2018-11-28 12:31:20,006 INFO  L177        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2018-11-28 12:31:20,006 INFO  L174        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2018-11-28 12:31:20,007 INFO  L174        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2018-11-28 12:31:20,008 INFO  L174        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2018-11-28 12:31:20,009 INFO  L174        SettingsManager]: Resetting LassoRanker preferences to default values
[2018-11-28 12:31:20,010 INFO  L174        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2018-11-28 12:31:20,010 INFO  L174        SettingsManager]: Resetting SyntaxChecker preferences to default values
[2018-11-28 12:31:20,011 INFO  L177        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2018-11-28 12:31:20,011 INFO  L174        SettingsManager]: Resetting LTL2Aut preferences to default values
[2018-11-28 12:31:20,012 INFO  L174        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2018-11-28 12:31:20,012 INFO  L174        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2018-11-28 12:31:20,013 INFO  L174        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2018-11-28 12:31:20,013 INFO  L174        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2018-11-28 12:31:20,015 INFO  L174        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2018-11-28 12:31:20,016 INFO  L174        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2018-11-28 12:31:20,017 INFO  L174        SettingsManager]: Resetting CodeCheck preferences to default values
[2018-11-28 12:31:20,018 INFO  L174        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2018-11-28 12:31:20,019 INFO  L174        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2018-11-28 12:31:20,020 INFO  L174        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2018-11-28 12:31:20,021 INFO  L177        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2018-11-28 12:31:20,021 INFO  L177        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2018-11-28 12:31:20,021 INFO  L174        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2018-11-28 12:31:20,022 INFO  L174        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2018-11-28 12:31:20,023 INFO  L174        SettingsManager]: Resetting Boogie Printer preferences to default values
[2018-11-28 12:31:20,023 INFO  L174        SettingsManager]: Resetting ReqPrinter preferences to default values
[2018-11-28 12:31:20,024 INFO  L174        SettingsManager]: Resetting Witness Printer preferences to default values
[2018-11-28 12:31:20,025 INFO  L177        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2018-11-28 12:31:20,025 INFO  L174        SettingsManager]: Resetting CDTParser preferences to default values
[2018-11-28 12:31:20,025 INFO  L177        SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2018-11-28 12:31:20,025 INFO  L177        SettingsManager]: ReqParser provides no preferences, ignoring...
[2018-11-28 12:31:20,026 INFO  L174        SettingsManager]: Resetting SmtParser preferences to default values
[2018-11-28 12:31:20,026 INFO  L174        SettingsManager]: Resetting Witness Parser preferences to default values
[2018-11-28 12:31:20,027 INFO  L181        SettingsManager]: Finished resetting all preferences to default values...
[2018-11-28 12:31:20,027 INFO  L98         SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_1eda1bcd-50bf-46ed-bcde-ee4df3fa9761/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf
[2018-11-28 12:31:20,036 INFO  L110        SettingsManager]: Loading preferences was successful
[2018-11-28 12:31:20,036 INFO  L112        SettingsManager]: Preferences different from defaults after loading the file:
[2018-11-28 12:31:20,037 INFO  L131        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2018-11-28 12:31:20,037 INFO  L133        SettingsManager]:  * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS
[2018-11-28 12:31:20,038 INFO  L131        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2018-11-28 12:31:20,038 INFO  L133        SettingsManager]:  * Create parallel compositions if possible=false
[2018-11-28 12:31:20,038 INFO  L133        SettingsManager]:  * Use SBE=true
[2018-11-28 12:31:20,038 INFO  L131        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2018-11-28 12:31:20,039 INFO  L133        SettingsManager]:  * sizeof long=4
[2018-11-28 12:31:20,039 INFO  L133        SettingsManager]:  * Overapproximate operations on floating types=true
[2018-11-28 12:31:20,039 INFO  L133        SettingsManager]:  * sizeof POINTER=4
[2018-11-28 12:31:20,039 INFO  L133        SettingsManager]:  * Check division by zero=IGNORE
[2018-11-28 12:31:20,039 INFO  L133        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2018-11-28 12:31:20,039 INFO  L133        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2018-11-28 12:31:20,039 INFO  L133        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2018-11-28 12:31:20,039 INFO  L133        SettingsManager]:  * sizeof long double=12
[2018-11-28 12:31:20,039 INFO  L133        SettingsManager]:  * Check if freed pointer was valid=false
[2018-11-28 12:31:20,040 INFO  L133        SettingsManager]:  * Use constant arrays=true
[2018-11-28 12:31:20,040 INFO  L133        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2018-11-28 12:31:20,040 INFO  L131        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2018-11-28 12:31:20,040 INFO  L133        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2018-11-28 12:31:20,040 INFO  L133        SettingsManager]:  * To the following directory=./dump/
[2018-11-28 12:31:20,040 INFO  L133        SettingsManager]:  * SMT solver=External_DefaultMode
[2018-11-28 12:31:20,040 INFO  L133        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2018-11-28 12:31:20,040 INFO  L131        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2018-11-28 12:31:20,041 INFO  L133        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2018-11-28 12:31:20,041 INFO  L133        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2018-11-28 12:31:20,041 INFO  L133        SettingsManager]:  * Trace refinement strategy=CAMEL
[2018-11-28 12:31:20,041 INFO  L133        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2018-11-28 12:31:20,041 INFO  L133        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2018-11-28 12:31:20,041 INFO  L133        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/working_dir_1eda1bcd-50bf-46ed-bcde-ee4df3fa9761/bin-2019/uautomizer
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) )


Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2a99c5e1922c5e2d2ce50e982def02dab2dbd81e
[2018-11-28 12:31:20,065 INFO  L81    nceAwareModelManager]: Repository-Root is: /tmp
[2018-11-28 12:31:20,073 INFO  L258   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2018-11-28 12:31:20,075 INFO  L214   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2018-11-28 12:31:20,076 INFO  L271        PluginConnector]: Initializing CDTParser...
[2018-11-28 12:31:20,076 INFO  L276        PluginConnector]: CDTParser initialized
[2018-11-28 12:31:20,076 INFO  L418   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_1eda1bcd-50bf-46ed-bcde-ee4df3fa9761/bin-2019/uautomizer/../../sv-benchmarks/c/list-ext3-properties/sll_length_check_false-unreach-call_false-valid-memcleanup.i
[2018-11-28 12:31:20,114 INFO  L221              CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_1eda1bcd-50bf-46ed-bcde-ee4df3fa9761/bin-2019/uautomizer/data/e1dadfafe/4b9c63186d004bb4884d3088f3f909e2/FLAG8af128d1c
[2018-11-28 12:31:20,540 INFO  L307              CDTParser]: Found 1 translation units.
[2018-11-28 12:31:20,540 INFO  L161              CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_1eda1bcd-50bf-46ed-bcde-ee4df3fa9761/sv-benchmarks/c/list-ext3-properties/sll_length_check_false-unreach-call_false-valid-memcleanup.i
[2018-11-28 12:31:20,548 INFO  L355              CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_1eda1bcd-50bf-46ed-bcde-ee4df3fa9761/bin-2019/uautomizer/data/e1dadfafe/4b9c63186d004bb4884d3088f3f909e2/FLAG8af128d1c
[2018-11-28 12:31:20,556 INFO  L363              CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_1eda1bcd-50bf-46ed-bcde-ee4df3fa9761/bin-2019/uautomizer/data/e1dadfafe/4b9c63186d004bb4884d3088f3f909e2
[2018-11-28 12:31:20,558 INFO  L296   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2018-11-28 12:31:20,558 INFO  L131        ToolchainWalker]: Walking toolchain with 6 elements.
[2018-11-28 12:31:20,559 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2018-11-28 12:31:20,559 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2018-11-28 12:31:20,561 INFO  L276        PluginConnector]: CACSL2BoogieTranslator initialized
[2018-11-28 12:31:20,562 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 12:31:20" (1/1) ...
[2018-11-28 12:31:20,564 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2560d587 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:31:20, skipping insertion in model container
[2018-11-28 12:31:20,564 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 12:31:20" (1/1) ...
[2018-11-28 12:31:20,568 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2018-11-28 12:31:20,590 INFO  L176         MainTranslator]: Built tables and reachable declarations
[2018-11-28 12:31:20,766 INFO  L203          PostProcessor]: Analyzing one entry point: main
[2018-11-28 12:31:20,773 INFO  L191         MainTranslator]: Completed pre-run
[2018-11-28 12:31:20,847 INFO  L203          PostProcessor]: Analyzing one entry point: main
[2018-11-28 12:31:20,877 INFO  L195         MainTranslator]: Completed translation
[2018-11-28 12:31:20,877 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:31:20 WrapperNode
[2018-11-28 12:31:20,877 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2018-11-28 12:31:20,878 INFO  L113        PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2018-11-28 12:31:20,878 INFO  L271        PluginConnector]: Initializing Boogie Procedure Inliner...
[2018-11-28 12:31:20,878 INFO  L276        PluginConnector]: Boogie Procedure Inliner initialized
[2018-11-28 12:31:20,884 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:31:20" (1/1) ...
[2018-11-28 12:31:20,892 INFO  L185        PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:31:20" (1/1) ...
[2018-11-28 12:31:20,897 INFO  L132        PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2018-11-28 12:31:20,898 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2018-11-28 12:31:20,898 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2018-11-28 12:31:20,898 INFO  L276        PluginConnector]: Boogie Preprocessor initialized
[2018-11-28 12:31:20,904 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:31:20" (1/1) ...
[2018-11-28 12:31:20,904 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:31:20" (1/1) ...
[2018-11-28 12:31:20,906 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:31:20" (1/1) ...
[2018-11-28 12:31:20,906 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:31:20" (1/1) ...
[2018-11-28 12:31:20,911 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:31:20" (1/1) ...
[2018-11-28 12:31:20,915 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:31:20" (1/1) ...
[2018-11-28 12:31:20,916 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:31:20" (1/1) ...
[2018-11-28 12:31:20,918 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2018-11-28 12:31:20,919 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2018-11-28 12:31:20,919 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2018-11-28 12:31:20,919 INFO  L276        PluginConnector]: RCFGBuilder initialized
[2018-11-28 12:31:20,920 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:31:20" (1/1) ...
No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_1eda1bcd-50bf-46ed-bcde-ee4df3fa9761/bin-2019/uautomizer/z3
Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2018-11-28 12:31:20,953 INFO  L130     BoogieDeclarations]: Found specification of procedure myexit
[2018-11-28 12:31:20,954 INFO  L138     BoogieDeclarations]: Found implementation of procedure myexit
[2018-11-28 12:31:20,954 INFO  L130     BoogieDeclarations]: Found specification of procedure sll_destroy
[2018-11-28 12:31:20,954 INFO  L138     BoogieDeclarations]: Found implementation of procedure sll_destroy
[2018-11-28 12:31:20,954 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.alloc
[2018-11-28 12:31:20,954 INFO  L130     BoogieDeclarations]: Found specification of procedure sll_length
[2018-11-28 12:31:20,954 INFO  L138     BoogieDeclarations]: Found implementation of procedure sll_length
[2018-11-28 12:31:20,954 INFO  L130     BoogieDeclarations]: Found specification of procedure sll_create
[2018-11-28 12:31:20,954 INFO  L138     BoogieDeclarations]: Found implementation of procedure sll_create
[2018-11-28 12:31:20,955 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2018-11-28 12:31:20,955 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2018-11-28 12:31:20,955 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2018-11-28 12:31:20,955 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2018-11-28 12:31:20,955 INFO  L130     BoogieDeclarations]: Found specification of procedure write~$Pointer$
[2018-11-28 12:31:20,955 INFO  L130     BoogieDeclarations]: Found specification of procedure read~$Pointer$
[2018-11-28 12:31:20,955 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc
[2018-11-28 12:31:20,955 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2018-11-28 12:31:20,955 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2018-11-28 12:31:21,149 INFO  L275             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2018-11-28 12:31:21,149 INFO  L280             CfgBuilder]: Removed 4 assue(true) statements.
[2018-11-28 12:31:21,149 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 12:31:21 BoogieIcfgContainer
[2018-11-28 12:31:21,149 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2018-11-28 12:31:21,150 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2018-11-28 12:31:21,150 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2018-11-28 12:31:21,152 INFO  L276        PluginConnector]: TraceAbstraction initialized
[2018-11-28 12:31:21,153 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 12:31:20" (1/3) ...
[2018-11-28 12:31:21,153 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15b83aa6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 12:31:21, skipping insertion in model container
[2018-11-28 12:31:21,154 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:31:20" (2/3) ...
[2018-11-28 12:31:21,154 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15b83aa6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 12:31:21, skipping insertion in model container
[2018-11-28 12:31:21,154 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 12:31:21" (3/3) ...
[2018-11-28 12:31:21,155 INFO  L112   eAbstractionObserver]: Analyzing ICFG sll_length_check_false-unreach-call_false-valid-memcleanup.i
[2018-11-28 12:31:21,164 INFO  L156   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2018-11-28 12:31:21,171 INFO  L168   ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2018-11-28 12:31:21,184 INFO  L257      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2018-11-28 12:31:21,207 INFO  L133   ementStrategyFactory]: Using default assertion order modulation
[2018-11-28 12:31:21,208 INFO  L382      AbstractCegarLoop]: Interprodecural is true
[2018-11-28 12:31:21,208 INFO  L383      AbstractCegarLoop]: Hoare is true
[2018-11-28 12:31:21,208 INFO  L384      AbstractCegarLoop]: Compute interpolants for FPandBP
[2018-11-28 12:31:21,208 INFO  L385      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2018-11-28 12:31:21,208 INFO  L386      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2018-11-28 12:31:21,209 INFO  L387      AbstractCegarLoop]: Difference is false
[2018-11-28 12:31:21,209 INFO  L388      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2018-11-28 12:31:21,209 INFO  L393      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2018-11-28 12:31:21,221 INFO  L276                IsEmpty]: Start isEmpty. Operand 41 states.
[2018-11-28 12:31:21,226 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 24
[2018-11-28 12:31:21,226 INFO  L394         BasicCegarLoop]: Found error trace
[2018-11-28 12:31:21,227 INFO  L402         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2018-11-28 12:31:21,229 INFO  L423      AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2018-11-28 12:31:21,234 INFO  L141       PredicateUnifier]: Initialized classic predicate unifier
[2018-11-28 12:31:21,234 INFO  L82        PathProgramCache]: Analyzing trace with hash -1672852016, now seen corresponding path program 1 times
[2018-11-28 12:31:21,236 INFO  L223   ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-11-28 12:31:21,236 INFO  L69    tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-11-28 12:31:21,273 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-11-28 12:31:21,273 INFO  L103   rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2018-11-28 12:31:21,273 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-11-28 12:31:21,295 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-11-28 12:31:21,324 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-11-28 12:31:21,326 INFO  L312   seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2018-11-28 12:31:21,326 INFO  L327   seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2018-11-28 12:31:21,329 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 2 states
[2018-11-28 12:31:21,336 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants.
[2018-11-28 12:31:21,337 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2
[2018-11-28 12:31:21,338 INFO  L87              Difference]: Start difference. First operand 41 states. Second operand 2 states.
[2018-11-28 12:31:21,354 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-11-28 12:31:21,355 INFO  L93              Difference]: Finished difference Result 73 states and 93 transitions.
[2018-11-28 12:31:21,355 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. 
[2018-11-28 12:31:21,356 INFO  L78                 Accepts]: Start accepts. Automaton has 2 states. Word has length 23
[2018-11-28 12:31:21,356 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2018-11-28 12:31:21,361 INFO  L225             Difference]: With dead ends: 73
[2018-11-28 12:31:21,361 INFO  L226             Difference]: Without dead ends: 28
[2018-11-28 12:31:21,364 INFO  L631         BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2
[2018-11-28 12:31:21,375 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 28 states.
[2018-11-28 12:31:21,385 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28.
[2018-11-28 12:31:21,386 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 28 states.
[2018-11-28 12:31:21,386 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions.
[2018-11-28 12:31:21,387 INFO  L78                 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 23
[2018-11-28 12:31:21,387 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2018-11-28 12:31:21,387 INFO  L480      AbstractCegarLoop]: Abstraction has 28 states and 31 transitions.
[2018-11-28 12:31:21,388 INFO  L481      AbstractCegarLoop]: Interpolant automaton has 2 states.
[2018-11-28 12:31:21,388 INFO  L276                IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions.
[2018-11-28 12:31:21,388 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 26
[2018-11-28 12:31:21,388 INFO  L394         BasicCegarLoop]: Found error trace
[2018-11-28 12:31:21,388 INFO  L402         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2018-11-28 12:31:21,389 INFO  L423      AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2018-11-28 12:31:21,389 INFO  L141       PredicateUnifier]: Initialized classic predicate unifier
[2018-11-28 12:31:21,389 INFO  L82        PathProgramCache]: Analyzing trace with hash -1285366475, now seen corresponding path program 1 times
[2018-11-28 12:31:21,389 INFO  L223   ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-11-28 12:31:21,389 INFO  L69    tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-11-28 12:31:21,390 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-11-28 12:31:21,390 INFO  L103   rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2018-11-28 12:31:21,390 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-11-28 12:31:21,408 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-11-28 12:31:21,449 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-11-28 12:31:21,449 INFO  L312   seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2018-11-28 12:31:21,449 INFO  L327   seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2018-11-28 12:31:21,450 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 5 states
[2018-11-28 12:31:21,450 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2018-11-28 12:31:21,450 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2018-11-28 12:31:21,451 INFO  L87              Difference]: Start difference. First operand 28 states and 31 transitions. Second operand 5 states.
[2018-11-28 12:31:21,522 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-11-28 12:31:21,522 INFO  L93              Difference]: Finished difference Result 45 states and 49 transitions.
[2018-11-28 12:31:21,522 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2018-11-28 12:31:21,522 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 25
[2018-11-28 12:31:21,523 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2018-11-28 12:31:21,523 INFO  L225             Difference]: With dead ends: 45
[2018-11-28 12:31:21,523 INFO  L226             Difference]: Without dead ends: 31
[2018-11-28 12:31:21,524 INFO  L631         BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30
[2018-11-28 12:31:21,524 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 31 states.
[2018-11-28 12:31:21,527 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29.
[2018-11-28 12:31:21,528 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 29 states.
[2018-11-28 12:31:21,528 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions.
[2018-11-28 12:31:21,528 INFO  L78                 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 25
[2018-11-28 12:31:21,528 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2018-11-28 12:31:21,529 INFO  L480      AbstractCegarLoop]: Abstraction has 29 states and 32 transitions.
[2018-11-28 12:31:21,529 INFO  L481      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2018-11-28 12:31:21,529 INFO  L276                IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions.
[2018-11-28 12:31:21,529 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 29
[2018-11-28 12:31:21,529 INFO  L394         BasicCegarLoop]: Found error trace
[2018-11-28 12:31:21,530 INFO  L402         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2018-11-28 12:31:21,530 INFO  L423      AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2018-11-28 12:31:21,530 INFO  L141       PredicateUnifier]: Initialized classic predicate unifier
[2018-11-28 12:31:21,530 INFO  L82        PathProgramCache]: Analyzing trace with hash 857903227, now seen corresponding path program 1 times
[2018-11-28 12:31:21,530 INFO  L223   ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-11-28 12:31:21,530 INFO  L69    tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-11-28 12:31:21,531 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-11-28 12:31:21,531 INFO  L103   rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2018-11-28 12:31:21,532 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-11-28 12:31:21,544 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-11-28 12:31:21,629 INFO  L134       CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-11-28 12:31:21,630 INFO  L312   seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2018-11-28 12:31:21,630 INFO  L327   seRefinementStrategy]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9
[2018-11-28 12:31:21,630 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 9 states
[2018-11-28 12:31:21,630 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants.
[2018-11-28 12:31:21,630 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72
[2018-11-28 12:31:21,631 INFO  L87              Difference]: Start difference. First operand 29 states and 32 transitions. Second operand 9 states.
[2018-11-28 12:31:21,702 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-11-28 12:31:21,702 INFO  L93              Difference]: Finished difference Result 39 states and 42 transitions.
[2018-11-28 12:31:21,702 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. 
[2018-11-28 12:31:21,702 INFO  L78                 Accepts]: Start accepts. Automaton has 9 states. Word has length 28
[2018-11-28 12:31:21,702 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2018-11-28 12:31:21,703 INFO  L225             Difference]: With dead ends: 39
[2018-11-28 12:31:21,703 INFO  L226             Difference]: Without dead ends: 32
[2018-11-28 12:31:21,703 INFO  L631         BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132
[2018-11-28 12:31:21,703 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 32 states.
[2018-11-28 12:31:21,706 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30.
[2018-11-28 12:31:21,706 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 30 states.
[2018-11-28 12:31:21,707 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions.
[2018-11-28 12:31:21,707 INFO  L78                 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 28
[2018-11-28 12:31:21,707 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2018-11-28 12:31:21,707 INFO  L480      AbstractCegarLoop]: Abstraction has 30 states and 33 transitions.
[2018-11-28 12:31:21,707 INFO  L481      AbstractCegarLoop]: Interpolant automaton has 9 states.
[2018-11-28 12:31:21,707 INFO  L276                IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions.
[2018-11-28 12:31:21,708 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 30
[2018-11-28 12:31:21,708 INFO  L394         BasicCegarLoop]: Found error trace
[2018-11-28 12:31:21,708 INFO  L402         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2018-11-28 12:31:21,708 INFO  L423      AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2018-11-28 12:31:21,708 INFO  L141       PredicateUnifier]: Initialized classic predicate unifier
[2018-11-28 12:31:21,708 INFO  L82        PathProgramCache]: Analyzing trace with hash -1051029791, now seen corresponding path program 1 times
[2018-11-28 12:31:21,708 INFO  L223   ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-11-28 12:31:21,708 INFO  L69    tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-11-28 12:31:21,709 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-11-28 12:31:21,709 INFO  L103   rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2018-11-28 12:31:21,709 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-11-28 12:31:21,720 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-11-28 12:31:21,752 INFO  L134       CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2018-11-28 12:31:21,753 INFO  L300   seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-11-28 12:31:21,753 INFO  L223   ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_1eda1bcd-50bf-46ed-bcde-ee4df3fa9761/bin-2019/uautomizer/z3
Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-11-28 12:31:21,764 INFO  L103   rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2018-11-28 12:31:21,790 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-11-28 12:31:21,795 INFO  L273         TraceCheckSpWp]: Computing forward predicates...
[2018-11-28 12:31:21,814 INFO  L134       CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2018-11-28 12:31:21,833 INFO  L312   seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-11-28 12:31:21,834 INFO  L327   seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6
[2018-11-28 12:31:21,834 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 6 states
[2018-11-28 12:31:21,834 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2018-11-28 12:31:21,834 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30
[2018-11-28 12:31:21,834 INFO  L87              Difference]: Start difference. First operand 30 states and 33 transitions. Second operand 6 states.
[2018-11-28 12:31:21,868 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-11-28 12:31:21,868 INFO  L93              Difference]: Finished difference Result 50 states and 54 transitions.
[2018-11-28 12:31:21,869 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2018-11-28 12:31:21,869 INFO  L78                 Accepts]: Start accepts. Automaton has 6 states. Word has length 29
[2018-11-28 12:31:21,869 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2018-11-28 12:31:21,869 INFO  L225             Difference]: With dead ends: 50
[2018-11-28 12:31:21,869 INFO  L226             Difference]: Without dead ends: 35
[2018-11-28 12:31:21,870 INFO  L631         BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42
[2018-11-28 12:31:21,870 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 35 states.
[2018-11-28 12:31:21,872 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33.
[2018-11-28 12:31:21,872 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 33 states.
[2018-11-28 12:31:21,873 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions.
[2018-11-28 12:31:21,873 INFO  L78                 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 29
[2018-11-28 12:31:21,873 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2018-11-28 12:31:21,873 INFO  L480      AbstractCegarLoop]: Abstraction has 33 states and 36 transitions.
[2018-11-28 12:31:21,873 INFO  L481      AbstractCegarLoop]: Interpolant automaton has 6 states.
[2018-11-28 12:31:21,873 INFO  L276                IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions.
[2018-11-28 12:31:21,874 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 33
[2018-11-28 12:31:21,874 INFO  L394         BasicCegarLoop]: Found error trace
[2018-11-28 12:31:21,874 INFO  L402         BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2018-11-28 12:31:21,874 INFO  L423      AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2018-11-28 12:31:21,874 INFO  L141       PredicateUnifier]: Initialized classic predicate unifier
[2018-11-28 12:31:21,874 INFO  L82        PathProgramCache]: Analyzing trace with hash 669200167, now seen corresponding path program 2 times
[2018-11-28 12:31:21,874 INFO  L223   ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-11-28 12:31:21,874 INFO  L69    tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-11-28 12:31:21,875 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-11-28 12:31:21,875 INFO  L103   rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2018-11-28 12:31:21,875 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-11-28 12:31:21,885 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-11-28 12:31:21,986 INFO  L134       CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-11-28 12:31:21,986 INFO  L300   seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-11-28 12:31:21,986 INFO  L223   ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_1eda1bcd-50bf-46ed-bcde-ee4df3fa9761/bin-2019/uautomizer/z3
Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-11-28 12:31:22,003 INFO  L103   rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1
[2018-11-28 12:31:22,030 INFO  L249   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2018-11-28 12:31:22,030 INFO  L250   tOrderPrioritization]: Conjunction of SSA is unsat
[2018-11-28 12:31:22,032 INFO  L273         TraceCheckSpWp]: Computing forward predicates...
[2018-11-28 12:31:22,140 INFO  L134       CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2018-11-28 12:31:22,155 INFO  L312   seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-11-28 12:31:22,155 INFO  L327   seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7] total 16
[2018-11-28 12:31:22,156 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 16 states
[2018-11-28 12:31:22,156 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants.
[2018-11-28 12:31:22,156 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240
[2018-11-28 12:31:22,156 INFO  L87              Difference]: Start difference. First operand 33 states and 36 transitions. Second operand 16 states.
[2018-11-28 12:31:22,400 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-11-28 12:31:22,400 INFO  L93              Difference]: Finished difference Result 57 states and 62 transitions.
[2018-11-28 12:31:22,401 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. 
[2018-11-28 12:31:22,401 INFO  L78                 Accepts]: Start accepts. Automaton has 16 states. Word has length 32
[2018-11-28 12:31:22,401 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2018-11-28 12:31:22,401 INFO  L225             Difference]: With dead ends: 57
[2018-11-28 12:31:22,401 INFO  L226             Difference]: Without dead ends: 39
[2018-11-28 12:31:22,402 INFO  L631         BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=554, Unknown=0, NotChecked=0, Total=650
[2018-11-28 12:31:22,402 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 39 states.
[2018-11-28 12:31:22,406 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37.
[2018-11-28 12:31:22,406 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 37 states.
[2018-11-28 12:31:22,407 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 40 transitions.
[2018-11-28 12:31:22,407 INFO  L78                 Accepts]: Start accepts. Automaton has 37 states and 40 transitions. Word has length 32
[2018-11-28 12:31:22,407 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2018-11-28 12:31:22,407 INFO  L480      AbstractCegarLoop]: Abstraction has 37 states and 40 transitions.
[2018-11-28 12:31:22,407 INFO  L481      AbstractCegarLoop]: Interpolant automaton has 16 states.
[2018-11-28 12:31:22,407 INFO  L276                IsEmpty]: Start isEmpty. Operand 37 states and 40 transitions.
[2018-11-28 12:31:22,408 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 37
[2018-11-28 12:31:22,408 INFO  L394         BasicCegarLoop]: Found error trace
[2018-11-28 12:31:22,408 INFO  L402         BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2018-11-28 12:31:22,408 INFO  L423      AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2018-11-28 12:31:22,408 INFO  L141       PredicateUnifier]: Initialized classic predicate unifier
[2018-11-28 12:31:22,408 INFO  L82        PathProgramCache]: Analyzing trace with hash 432067323, now seen corresponding path program 3 times
[2018-11-28 12:31:22,408 INFO  L223   ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-11-28 12:31:22,408 INFO  L69    tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-11-28 12:31:22,409 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-11-28 12:31:22,409 INFO  L101   rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2018-11-28 12:31:22,409 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-11-28 12:31:22,424 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-11-28 12:31:22,503 INFO  L134       CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked.
[2018-11-28 12:31:22,504 INFO  L300   seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-11-28 12:31:22,504 INFO  L223   ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_1eda1bcd-50bf-46ed-bcde-ee4df3fa9761/bin-2019/uautomizer/z3
Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000
[2018-11-28 12:31:22,512 INFO  L103   rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2
[2018-11-28 12:31:22,534 INFO  L249   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s)
[2018-11-28 12:31:22,534 INFO  L250   tOrderPrioritization]: Conjunction of SSA is unsat
[2018-11-28 12:31:22,536 INFO  L273         TraceCheckSpWp]: Computing forward predicates...
[2018-11-28 12:31:22,572 INFO  L134       CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked.
[2018-11-28 12:31:22,597 INFO  L312   seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-11-28 12:31:22,597 INFO  L327   seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9
[2018-11-28 12:31:22,597 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 9 states
[2018-11-28 12:31:22,598 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants.
[2018-11-28 12:31:22,598 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72
[2018-11-28 12:31:22,598 INFO  L87              Difference]: Start difference. First operand 37 states and 40 transitions. Second operand 9 states.
[2018-11-28 12:31:22,652 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-11-28 12:31:22,653 INFO  L93              Difference]: Finished difference Result 55 states and 62 transitions.
[2018-11-28 12:31:22,653 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. 
[2018-11-28 12:31:22,653 INFO  L78                 Accepts]: Start accepts. Automaton has 9 states. Word has length 36
[2018-11-28 12:31:22,654 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2018-11-28 12:31:22,655 INFO  L225             Difference]: With dead ends: 55
[2018-11-28 12:31:22,658 INFO  L226             Difference]: Without dead ends: 51
[2018-11-28 12:31:22,658 INFO  L631         BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90
[2018-11-28 12:31:22,658 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 51 states.
[2018-11-28 12:31:22,668 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 47.
[2018-11-28 12:31:22,668 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 47 states.
[2018-11-28 12:31:22,669 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions.
[2018-11-28 12:31:22,669 INFO  L78                 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 36
[2018-11-28 12:31:22,669 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2018-11-28 12:31:22,669 INFO  L480      AbstractCegarLoop]: Abstraction has 47 states and 55 transitions.
[2018-11-28 12:31:22,670 INFO  L481      AbstractCegarLoop]: Interpolant automaton has 9 states.
[2018-11-28 12:31:22,670 INFO  L276                IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions.
[2018-11-28 12:31:22,671 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 38
[2018-11-28 12:31:22,671 INFO  L394         BasicCegarLoop]: Found error trace
[2018-11-28 12:31:22,671 INFO  L402         BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2018-11-28 12:31:22,671 INFO  L423      AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2018-11-28 12:31:22,671 INFO  L141       PredicateUnifier]: Initialized classic predicate unifier
[2018-11-28 12:31:22,672 INFO  L82        PathProgramCache]: Analyzing trace with hash -1367040927, now seen corresponding path program 4 times
[2018-11-28 12:31:22,672 INFO  L223   ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-11-28 12:31:22,672 INFO  L69    tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-11-28 12:31:22,673 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-11-28 12:31:22,674 INFO  L101   rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2018-11-28 12:31:22,675 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-11-28 12:31:22,691 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is sat
[2018-11-28 12:31:22,705 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is sat
[2018-11-28 12:31:22,723 INFO  L469         BasicCegarLoop]: Counterexample might be feasible
[2018-11-28 12:31:22,746 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 12:31:22 BoogieIcfgContainer
[2018-11-28 12:31:22,746 INFO  L132        PluginConnector]: ------------------------ END TraceAbstraction----------------------------
[2018-11-28 12:31:22,746 INFO  L113        PluginConnector]: ------------------------Witness Printer----------------------------
[2018-11-28 12:31:22,747 INFO  L271        PluginConnector]: Initializing Witness Printer...
[2018-11-28 12:31:22,747 INFO  L276        PluginConnector]: Witness Printer initialized
[2018-11-28 12:31:22,747 INFO  L185        PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 12:31:21" (3/4) ...
[2018-11-28 12:31:22,749 INFO  L138         WitnessPrinter]: Generating witness for reachability counterexample
[2018-11-28 12:31:22,794 INFO  L145         WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_1eda1bcd-50bf-46ed-bcde-ee4df3fa9761/bin-2019/uautomizer/witness.graphml
[2018-11-28 12:31:22,795 INFO  L132        PluginConnector]: ------------------------ END Witness Printer----------------------------
[2018-11-28 12:31:22,795 INFO  L168              Benchmark]: Toolchain (without parser) took 2237.35 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 155.7 MB). Free memory was 954.9 MB in the beginning and 877.7 MB in the end (delta: 77.2 MB). Peak memory consumption was 233.0 MB. Max. memory is 11.5 GB.
[2018-11-28 12:31:22,797 INFO  L168              Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 1.0 GB. Free memory is still 985.0 MB. There was no memory consumed. Max. memory is 11.5 GB.
[2018-11-28 12:31:22,797 INFO  L168              Benchmark]: CACSL2BoogieTranslator took 318.90 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 155.7 MB). Free memory was 954.9 MB in the beginning and 1.1 GB in the end (delta: -185.1 MB). Peak memory consumption was 30.2 MB. Max. memory is 11.5 GB.
[2018-11-28 12:31:22,797 INFO  L168              Benchmark]: Boogie Procedure Inliner took 19.30 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB.
[2018-11-28 12:31:22,797 INFO  L168              Benchmark]: Boogie Preprocessor took 20.86 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB.
[2018-11-28 12:31:22,798 INFO  L168              Benchmark]: RCFGBuilder took 230.59 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: 28.4 MB). Peak memory consumption was 28.4 MB. Max. memory is 11.5 GB.
[2018-11-28 12:31:22,798 INFO  L168              Benchmark]: TraceAbstraction took 1596.37 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 881.1 MB in the end (delta: 230.5 MB). Peak memory consumption was 230.5 MB. Max. memory is 11.5 GB.
[2018-11-28 12:31:22,798 INFO  L168              Benchmark]: Witness Printer took 48.29 ms. Allocated memory is still 1.2 GB. Free memory was 881.1 MB in the beginning and 877.7 MB in the end (delta: 3.4 MB). Peak memory consumption was 3.4 MB. Max. memory is 11.5 GB.
[2018-11-28 12:31:22,800 INFO  L336   ainManager$Toolchain]: #######################  End [Toolchain 1] #######################
 --- Results ---
 * Results from de.uni_freiburg.informatik.ultimate.core:
  - StatisticsResult: Toolchain Benchmarks
    Benchmark results are:
 * CDTParser took 0.11 ms. Allocated memory is still 1.0 GB. Free memory is still 985.0 MB. There was no memory consumed. Max. memory is 11.5 GB.
 * CACSL2BoogieTranslator took 318.90 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 155.7 MB). Free memory was 954.9 MB in the beginning and 1.1 GB in the end (delta: -185.1 MB). Peak memory consumption was 30.2 MB. Max. memory is 11.5 GB.
 * Boogie Procedure Inliner took 19.30 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB.
 * Boogie Preprocessor took 20.86 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB.
 * RCFGBuilder took 230.59 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: 28.4 MB). Peak memory consumption was 28.4 MB. Max. memory is 11.5 GB.
 * TraceAbstraction took 1596.37 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 881.1 MB in the end (delta: 230.5 MB). Peak memory consumption was 230.5 MB. Max. memory is 11.5 GB.
 * Witness Printer took 48.29 ms. Allocated memory is still 1.2 GB. Free memory was 881.1 MB in the beginning and 877.7 MB in the end (delta: 3.4 MB). Peak memory consumption was 3.4 MB. Max. memory is 11.5 GB.
 * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction:
  - CounterExampleResult [Line: 602]: a call of __VERIFIER_error() is reachable
    a call of __VERIFIER_error() is reachable
We found a FailurePath: 
[L592]              int len = 2;
        VAL         [len=2]
[L593]              len < 32 && __VERIFIER_nondet_int()
[L593]              len < 32 && __VERIFIER_nondet_int()
        VAL         [__VERIFIER_nondet_int()=0, len=2, len < 32 && __VERIFIER_nondet_int()=0]
[L593]  COND FALSE  !(len < 32 && __VERIFIER_nondet_int())
[L596]  CALL, EXPR  sll_create(len + 1)
        VAL         [\old(len)=3]
[L564]              SLL head = ((void *)0);
        VAL         [\old(len)=3, head={0:0}, len=3]
[L565]  COND TRUE   len > 0
[L566]              SLL new_head = (SLL) malloc(sizeof(struct node));
        VAL         [\old(len)=3, head={0:0}, len=3, malloc(sizeof(struct node))={5:0}, new_head={5:0}]
[L567]  COND FALSE  !(((void *)0) == new_head)
        VAL         [\old(len)=3, head={0:0}, len=3, malloc(sizeof(struct node))={5:0}, new_head={5:0}]
[L570]              new_head->next = head
[L571]              head = new_head
[L572]              len--
        VAL         [\old(len)=3, head={5:0}, len=2, malloc(sizeof(struct node))={5:0}, new_head={5:0}]
[L565]  COND TRUE   len > 0
[L566]              SLL new_head = (SLL) malloc(sizeof(struct node));
        VAL         [\old(len)=3, head={5:0}, len=2, malloc(sizeof(struct node))={7:0}, new_head={7:0}]
[L567]  COND FALSE  !(((void *)0) == new_head)
        VAL         [\old(len)=3, head={5:0}, len=2, malloc(sizeof(struct node))={7:0}, new_head={7:0}]
[L570]              new_head->next = head
[L571]              head = new_head
[L572]              len--
        VAL         [\old(len)=3, head={7:0}, len=1, malloc(sizeof(struct node))={7:0}, new_head={7:0}]
[L565]  COND TRUE   len > 0
[L566]              SLL new_head = (SLL) malloc(sizeof(struct node));
        VAL         [\old(len)=3, head={7:0}, len=1, malloc(sizeof(struct node))={8:0}, new_head={8:0}]
[L567]  COND FALSE  !(((void *)0) == new_head)
        VAL         [\old(len)=3, head={7:0}, len=1, malloc(sizeof(struct node))={8:0}, new_head={8:0}]
[L570]              new_head->next = head
[L571]              head = new_head
[L572]              len--
        VAL         [\old(len)=3, head={8:0}, len=0, malloc(sizeof(struct node))={8:0}, new_head={8:0}]
[L565]  COND FALSE  !(len > 0)
        VAL         [\old(len)=3, head={8:0}, len=0, malloc(sizeof(struct node))={8:0}, new_head={8:0}]
[L574]              return head;
        VAL         [\old(len)=3, \result={8:0}, head={8:0}, len=0, malloc(sizeof(struct node))={8:0}, new_head={8:0}]
[L596]  RET, EXPR   sll_create(len + 1)
        VAL         [len=2, sll_create(len + 1)={8:0}]
[L596]              SLL s = sll_create(len + 1);
[L597]  CALL, EXPR  sll_length(s)
        VAL         [head={8:0}]
[L577]              int len = 0;
        VAL         [head={8:0}, head={8:0}, len=0]
[L578]  COND TRUE   \read(head)
[L579]              len++
[L580]  EXPR        head->next
[L580]              head = head->next
[L578]  COND TRUE   \read(head)
[L579]              len++
[L580]  EXPR        head->next
[L580]              head = head->next
[L578]  COND TRUE   \read(head)
[L579]              len++
[L580]  EXPR        head->next
[L580]              head = head->next
[L578]  COND FALSE  !(\read(head))
        VAL         [head={8:0}, head={0:0}, len=3]
[L582]              return len;
        VAL         [\result=3, head={0:0}, head={8:0}, len=3]
[L597]  RET, EXPR   sll_length(s)
        VAL         [len=2, s={8:0}, sll_length(s)=3]
[L597]  COND TRUE   len != sll_length(s)
[L602]              __VERIFIER_error()
        VAL         [len=2, s={8:0}]

  - StatisticsResult: Ultimate Automizer benchmark data
    CFG has 7 procedures, 43 locations, 1 error locations. UNSAFE Result, 1.5s OverallTime, 7 OverallIterations, 3 TraceHistogramMax, 0.5s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 169 SDtfs, 79 SDslu, 708 SDs, 0 SdLazy, 413 SolverSat, 15 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 151 GetRequests, 98 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=47occurred in iteration=6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 6 MinimizatonAttempts, 12 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 307 NumberOfCodeBlocks, 301 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 261 ConstructedInterpolants, 0 QuantifiedInterpolants, 20294 SizeOfPredicates, 6 NumberOfNonLiveVariables, 388 ConjunctsInSsa, 24 ConjunctsInUnsatCore, 9 InterpolantComputations, 3 PerfectInterpolantSequences, 30/47 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available
RESULT: Ultimate proved your program to be incorrect!
Received shutdown request...