./Ultimate.py --spec ../../sv-benchmarks/c/ReachSafety.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 5842f4b8
Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_e06f2b99-acb1-45f9-bdb8-a40a018ccb20/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_e06f2b99-acb1-45f9-bdb8-a40a018ccb20/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_e06f2b99-acb1-45f9-bdb8-a40a018ccb20/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_e06f2b99-acb1-45f9-bdb8-a40a018ccb20/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_e06f2b99-acb1-45f9-bdb8-a40a018ccb20/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_e06f2b99-acb1-45f9-bdb8-a40a018ccb20/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 1d36d9c90d70f68ab71543f184cd64aeaf02e524
..................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................
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 0.1.23-5842f4b
[2018-11-18 15:24:35,960 INFO  L170        SettingsManager]: Resetting all preferences to default values...
[2018-11-18 15:24:35,961 INFO  L174        SettingsManager]: Resetting UltimateCore preferences to default values
[2018-11-18 15:24:35,968 INFO  L177        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2018-11-18 15:24:35,969 INFO  L174        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2018-11-18 15:24:35,969 INFO  L174        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2018-11-18 15:24:35,970 INFO  L174        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2018-11-18 15:24:35,971 INFO  L174        SettingsManager]: Resetting LassoRanker preferences to default values
[2018-11-18 15:24:35,972 INFO  L174        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2018-11-18 15:24:35,973 INFO  L174        SettingsManager]: Resetting SyntaxChecker preferences to default values
[2018-11-18 15:24:35,973 INFO  L177        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2018-11-18 15:24:35,973 INFO  L174        SettingsManager]: Resetting LTL2Aut preferences to default values
[2018-11-18 15:24:35,974 INFO  L174        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2018-11-18 15:24:35,975 INFO  L174        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2018-11-18 15:24:35,975 INFO  L174        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2018-11-18 15:24:35,976 INFO  L174        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2018-11-18 15:24:35,976 INFO  L174        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2018-11-18 15:24:35,978 INFO  L174        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2018-11-18 15:24:35,979 INFO  L174        SettingsManager]: Resetting CodeCheck preferences to default values
[2018-11-18 15:24:35,980 INFO  L174        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2018-11-18 15:24:35,981 INFO  L174        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2018-11-18 15:24:35,982 INFO  L174        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2018-11-18 15:24:35,983 INFO  L177        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2018-11-18 15:24:35,983 INFO  L177        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2018-11-18 15:24:35,984 INFO  L174        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2018-11-18 15:24:35,984 INFO  L174        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2018-11-18 15:24:35,985 INFO  L174        SettingsManager]: Resetting Boogie Printer preferences to default values
[2018-11-18 15:24:35,986 INFO  L174        SettingsManager]: Resetting ReqPrinter preferences to default values
[2018-11-18 15:24:35,986 INFO  L174        SettingsManager]: Resetting Witness Printer preferences to default values
[2018-11-18 15:24:35,987 INFO  L177        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2018-11-18 15:24:35,987 INFO  L174        SettingsManager]: Resetting CDTParser preferences to default values
[2018-11-18 15:24:35,988 INFO  L177        SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2018-11-18 15:24:35,988 INFO  L177        SettingsManager]: ReqParser provides no preferences, ignoring...
[2018-11-18 15:24:35,988 INFO  L174        SettingsManager]: Resetting SmtParser preferences to default values
[2018-11-18 15:24:35,989 INFO  L174        SettingsManager]: Resetting Witness Parser preferences to default values
[2018-11-18 15:24:35,989 INFO  L181        SettingsManager]: Finished resetting all preferences to default values...
[2018-11-18 15:24:35,989 INFO  L98         SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_e06f2b99-acb1-45f9-bdb8-a40a018ccb20/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf
[2018-11-18 15:24:35,999 INFO  L110        SettingsManager]: Loading preferences was successful
[2018-11-18 15:24:35,999 INFO  L112        SettingsManager]: Preferences different from defaults after loading the file:
[2018-11-18 15:24:36,000 INFO  L131        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2018-11-18 15:24:36,000 INFO  L133        SettingsManager]:  * to procedures, called more than once=true
[2018-11-18 15:24:36,000 INFO  L131        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2018-11-18 15:24:36,001 INFO  L133        SettingsManager]:  * Create parallel compositions if possible=false
[2018-11-18 15:24:36,001 INFO  L133        SettingsManager]:  * Use SBE=true
[2018-11-18 15:24:36,001 INFO  L131        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2018-11-18 15:24:36,001 INFO  L133        SettingsManager]:  * sizeof long=4
[2018-11-18 15:24:36,001 INFO  L133        SettingsManager]:  * Overapproximate operations on floating types=true
[2018-11-18 15:24:36,001 INFO  L133        SettingsManager]:  * sizeof POINTER=4
[2018-11-18 15:24:36,002 INFO  L133        SettingsManager]:  * Check division by zero=IGNORE
[2018-11-18 15:24:36,002 INFO  L133        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2018-11-18 15:24:36,002 INFO  L133        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2018-11-18 15:24:36,002 INFO  L133        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2018-11-18 15:24:36,002 INFO  L133        SettingsManager]:  * sizeof long double=12
[2018-11-18 15:24:36,002 INFO  L133        SettingsManager]:  * Check if freed pointer was valid=false
[2018-11-18 15:24:36,002 INFO  L133        SettingsManager]:  * Use constant arrays=true
[2018-11-18 15:24:36,002 INFO  L133        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2018-11-18 15:24:36,003 INFO  L131        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2018-11-18 15:24:36,003 INFO  L133        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2018-11-18 15:24:36,003 INFO  L133        SettingsManager]:  * To the following directory=./dump/
[2018-11-18 15:24:36,003 INFO  L133        SettingsManager]:  * SMT solver=External_DefaultMode
[2018-11-18 15:24:36,003 INFO  L133        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2018-11-18 15:24:36,003 INFO  L131        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2018-11-18 15:24:36,004 INFO  L133        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2018-11-18 15:24:36,004 INFO  L133        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2018-11-18 15:24:36,004 INFO  L133        SettingsManager]:  * Trace refinement strategy=CAMEL
[2018-11-18 15:24:36,004 INFO  L133        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2018-11-18 15:24:36,004 INFO  L133        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2018-11-18 15:24:36,004 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_e06f2b99-acb1-45f9-bdb8-a40a018ccb20/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 -> 1d36d9c90d70f68ab71543f184cd64aeaf02e524
[2018-11-18 15:24:36,026 INFO  L81    nceAwareModelManager]: Repository-Root is: /tmp
[2018-11-18 15:24:36,034 INFO  L258   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2018-11-18 15:24:36,036 INFO  L214   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2018-11-18 15:24:36,037 INFO  L271        PluginConnector]: Initializing CDTParser...
[2018-11-18 15:24:36,037 INFO  L276        PluginConnector]: CDTParser initialized
[2018-11-18 15:24:36,038 INFO  L418   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_e06f2b99-acb1-45f9-bdb8-a40a018ccb20/bin-2019/uautomizer/../../sv-benchmarks/c/list-ext3-properties/sll_length_check_false-unreach-call_false-valid-memcleanup.i
[2018-11-18 15:24:36,073 INFO  L221              CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_e06f2b99-acb1-45f9-bdb8-a40a018ccb20/bin-2019/uautomizer/data/3f583d66b/6d9789e62b9c45c383b4f196d58ed78b/FLAG03cc1e0a6
[2018-11-18 15:24:36,451 INFO  L307              CDTParser]: Found 1 translation units.
[2018-11-18 15:24:36,451 INFO  L161              CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_e06f2b99-acb1-45f9-bdb8-a40a018ccb20/sv-benchmarks/c/list-ext3-properties/sll_length_check_false-unreach-call_false-valid-memcleanup.i
[2018-11-18 15:24:36,460 INFO  L355              CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_e06f2b99-acb1-45f9-bdb8-a40a018ccb20/bin-2019/uautomizer/data/3f583d66b/6d9789e62b9c45c383b4f196d58ed78b/FLAG03cc1e0a6
[2018-11-18 15:24:36,837 INFO  L363              CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_e06f2b99-acb1-45f9-bdb8-a40a018ccb20/bin-2019/uautomizer/data/3f583d66b/6d9789e62b9c45c383b4f196d58ed78b
[2018-11-18 15:24:36,840 INFO  L296   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2018-11-18 15:24:36,841 INFO  L131        ToolchainWalker]: Walking toolchain with 5 elements.
[2018-11-18 15:24:36,841 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2018-11-18 15:24:36,842 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2018-11-18 15:24:36,845 INFO  L276        PluginConnector]: CACSL2BoogieTranslator initialized
[2018-11-18 15:24:36,846 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 03:24:36" (1/1) ...
[2018-11-18 15:24:36,849 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4dbd711 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 03:24:36, skipping insertion in model container
[2018-11-18 15:24:36,849 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 03:24:36" (1/1) ...
[2018-11-18 15:24:36,856 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2018-11-18 15:24:36,892 INFO  L176         MainTranslator]: Built tables and reachable declarations
[2018-11-18 15:24:37,104 INFO  L201          PostProcessor]: Analyzing one entry point: main
[2018-11-18 15:24:37,110 INFO  L191         MainTranslator]: Completed pre-run
[2018-11-18 15:24:37,143 INFO  L201          PostProcessor]: Analyzing one entry point: main
[2018-11-18 15:24:37,173 INFO  L195         MainTranslator]: Completed translation
[2018-11-18 15:24:37,173 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 03:24:37 WrapperNode
[2018-11-18 15:24:37,174 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2018-11-18 15:24:37,174 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2018-11-18 15:24:37,174 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2018-11-18 15:24:37,174 INFO  L276        PluginConnector]: Boogie Preprocessor initialized
[2018-11-18 15:24:37,227 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 03:24:37" (1/1) ...
[2018-11-18 15:24:37,227 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 03:24:37" (1/1) ...
[2018-11-18 15:24:37,236 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 03:24:37" (1/1) ...
[2018-11-18 15:24:37,236 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 03:24:37" (1/1) ...
[2018-11-18 15:24:37,243 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 03:24:37" (1/1) ...
[2018-11-18 15:24:37,248 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 03:24:37" (1/1) ...
[2018-11-18 15:24:37,250 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 03:24:37" (1/1) ...
[2018-11-18 15:24:37,253 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2018-11-18 15:24:37,254 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2018-11-18 15:24:37,254 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2018-11-18 15:24:37,254 INFO  L276        PluginConnector]: RCFGBuilder initialized
[2018-11-18 15:24:37,255 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 03:24:37" (1/1) ...
No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e06f2b99-acb1-45f9-bdb8-a40a018ccb20/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
[2018-11-18 15:24:37,291 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2018-11-18 15:24:37,292 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2018-11-18 15:24:37,292 INFO  L138     BoogieDeclarations]: Found implementation of procedure __bswap_32
[2018-11-18 15:24:37,292 INFO  L138     BoogieDeclarations]: Found implementation of procedure __bswap_64
[2018-11-18 15:24:37,292 INFO  L138     BoogieDeclarations]: Found implementation of procedure exit
[2018-11-18 15:24:37,292 INFO  L138     BoogieDeclarations]: Found implementation of procedure sll_create
[2018-11-18 15:24:37,292 INFO  L138     BoogieDeclarations]: Found implementation of procedure sll_length
[2018-11-18 15:24:37,292 INFO  L138     BoogieDeclarations]: Found implementation of procedure sll_destroy
[2018-11-18 15:24:37,292 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2018-11-18 15:24:37,293 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2018-11-18 15:24:37,293 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int
[2018-11-18 15:24:37,293 INFO  L130     BoogieDeclarations]: Found specification of procedure __bswap_32
[2018-11-18 15:24:37,293 INFO  L130     BoogieDeclarations]: Found specification of procedure __bswap_64
[2018-11-18 15:24:37,293 INFO  L130     BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max
[2018-11-18 15:24:37,293 INFO  L130     BoogieDeclarations]: Found specification of procedure atof
[2018-11-18 15:24:37,293 INFO  L130     BoogieDeclarations]: Found specification of procedure atoi
[2018-11-18 15:24:37,293 INFO  L130     BoogieDeclarations]: Found specification of procedure atol
[2018-11-18 15:24:37,293 INFO  L130     BoogieDeclarations]: Found specification of procedure atoll
[2018-11-18 15:24:37,293 INFO  L130     BoogieDeclarations]: Found specification of procedure strtod
[2018-11-18 15:24:37,294 INFO  L130     BoogieDeclarations]: Found specification of procedure strtof
[2018-11-18 15:24:37,294 INFO  L130     BoogieDeclarations]: Found specification of procedure strtold
[2018-11-18 15:24:37,294 INFO  L130     BoogieDeclarations]: Found specification of procedure strtol
[2018-11-18 15:24:37,294 INFO  L130     BoogieDeclarations]: Found specification of procedure strtoul
[2018-11-18 15:24:37,294 INFO  L130     BoogieDeclarations]: Found specification of procedure strtoq
[2018-11-18 15:24:37,294 INFO  L130     BoogieDeclarations]: Found specification of procedure strtouq
[2018-11-18 15:24:37,294 INFO  L130     BoogieDeclarations]: Found specification of procedure strtoll
[2018-11-18 15:24:37,294 INFO  L130     BoogieDeclarations]: Found specification of procedure strtoull
[2018-11-18 15:24:37,294 INFO  L130     BoogieDeclarations]: Found specification of procedure l64a
[2018-11-18 15:24:37,294 INFO  L130     BoogieDeclarations]: Found specification of procedure a64l
[2018-11-18 15:24:37,294 INFO  L130     BoogieDeclarations]: Found specification of procedure select
[2018-11-18 15:24:37,294 INFO  L130     BoogieDeclarations]: Found specification of procedure pselect
[2018-11-18 15:24:37,294 INFO  L130     BoogieDeclarations]: Found specification of procedure gnu_dev_major
[2018-11-18 15:24:37,295 INFO  L130     BoogieDeclarations]: Found specification of procedure gnu_dev_minor
[2018-11-18 15:24:37,295 INFO  L130     BoogieDeclarations]: Found specification of procedure gnu_dev_makedev
[2018-11-18 15:24:37,295 INFO  L130     BoogieDeclarations]: Found specification of procedure random
[2018-11-18 15:24:37,295 INFO  L130     BoogieDeclarations]: Found specification of procedure srandom
[2018-11-18 15:24:37,295 INFO  L130     BoogieDeclarations]: Found specification of procedure initstate
[2018-11-18 15:24:37,295 INFO  L130     BoogieDeclarations]: Found specification of procedure setstate
[2018-11-18 15:24:37,295 INFO  L130     BoogieDeclarations]: Found specification of procedure random_r
[2018-11-18 15:24:37,295 INFO  L130     BoogieDeclarations]: Found specification of procedure srandom_r
[2018-11-18 15:24:37,295 INFO  L130     BoogieDeclarations]: Found specification of procedure initstate_r
[2018-11-18 15:24:37,296 INFO  L130     BoogieDeclarations]: Found specification of procedure setstate_r
[2018-11-18 15:24:37,296 INFO  L130     BoogieDeclarations]: Found specification of procedure rand
[2018-11-18 15:24:37,296 INFO  L130     BoogieDeclarations]: Found specification of procedure srand
[2018-11-18 15:24:37,296 INFO  L130     BoogieDeclarations]: Found specification of procedure rand_r
[2018-11-18 15:24:37,296 INFO  L130     BoogieDeclarations]: Found specification of procedure drand48
[2018-11-18 15:24:37,296 INFO  L130     BoogieDeclarations]: Found specification of procedure erand48
[2018-11-18 15:24:37,296 INFO  L130     BoogieDeclarations]: Found specification of procedure lrand48
[2018-11-18 15:24:37,296 INFO  L130     BoogieDeclarations]: Found specification of procedure nrand48
[2018-11-18 15:24:37,296 INFO  L130     BoogieDeclarations]: Found specification of procedure mrand48
[2018-11-18 15:24:37,297 INFO  L130     BoogieDeclarations]: Found specification of procedure jrand48
[2018-11-18 15:24:37,297 INFO  L130     BoogieDeclarations]: Found specification of procedure srand48
[2018-11-18 15:24:37,297 INFO  L130     BoogieDeclarations]: Found specification of procedure seed48
[2018-11-18 15:24:37,297 INFO  L130     BoogieDeclarations]: Found specification of procedure lcong48
[2018-11-18 15:24:37,297 INFO  L130     BoogieDeclarations]: Found specification of procedure drand48_r
[2018-11-18 15:24:37,297 INFO  L130     BoogieDeclarations]: Found specification of procedure erand48_r
[2018-11-18 15:24:37,297 INFO  L130     BoogieDeclarations]: Found specification of procedure lrand48_r
[2018-11-18 15:24:37,297 INFO  L130     BoogieDeclarations]: Found specification of procedure nrand48_r
[2018-11-18 15:24:37,297 INFO  L130     BoogieDeclarations]: Found specification of procedure mrand48_r
[2018-11-18 15:24:37,298 INFO  L130     BoogieDeclarations]: Found specification of procedure jrand48_r
[2018-11-18 15:24:37,298 INFO  L130     BoogieDeclarations]: Found specification of procedure srand48_r
[2018-11-18 15:24:37,298 INFO  L130     BoogieDeclarations]: Found specification of procedure seed48_r
[2018-11-18 15:24:37,298 INFO  L130     BoogieDeclarations]: Found specification of procedure lcong48_r
[2018-11-18 15:24:37,298 INFO  L130     BoogieDeclarations]: Found specification of procedure malloc
[2018-11-18 15:24:37,298 INFO  L130     BoogieDeclarations]: Found specification of procedure calloc
[2018-11-18 15:24:37,298 INFO  L130     BoogieDeclarations]: Found specification of procedure realloc
[2018-11-18 15:24:37,298 INFO  L130     BoogieDeclarations]: Found specification of procedure free
[2018-11-18 15:24:37,298 INFO  L130     BoogieDeclarations]: Found specification of procedure cfree
[2018-11-18 15:24:37,298 INFO  L130     BoogieDeclarations]: Found specification of procedure alloca
[2018-11-18 15:24:37,299 INFO  L130     BoogieDeclarations]: Found specification of procedure valloc
[2018-11-18 15:24:37,299 INFO  L130     BoogieDeclarations]: Found specification of procedure posix_memalign
[2018-11-18 15:24:37,299 INFO  L130     BoogieDeclarations]: Found specification of procedure aligned_alloc
[2018-11-18 15:24:37,299 INFO  L130     BoogieDeclarations]: Found specification of procedure abort
[2018-11-18 15:24:37,299 INFO  L130     BoogieDeclarations]: Found specification of procedure atexit
[2018-11-18 15:24:37,299 INFO  L130     BoogieDeclarations]: Found specification of procedure at_quick_exit
[2018-11-18 15:24:37,299 INFO  L130     BoogieDeclarations]: Found specification of procedure on_exit
[2018-11-18 15:24:37,299 INFO  L130     BoogieDeclarations]: Found specification of procedure exit
[2018-11-18 15:24:37,299 INFO  L130     BoogieDeclarations]: Found specification of procedure quick_exit
[2018-11-18 15:24:37,300 INFO  L130     BoogieDeclarations]: Found specification of procedure _Exit
[2018-11-18 15:24:37,300 INFO  L130     BoogieDeclarations]: Found specification of procedure getenv
[2018-11-18 15:24:37,300 INFO  L130     BoogieDeclarations]: Found specification of procedure putenv
[2018-11-18 15:24:37,300 INFO  L130     BoogieDeclarations]: Found specification of procedure setenv
[2018-11-18 15:24:37,300 INFO  L130     BoogieDeclarations]: Found specification of procedure unsetenv
[2018-11-18 15:24:37,300 INFO  L130     BoogieDeclarations]: Found specification of procedure clearenv
[2018-11-18 15:24:37,300 INFO  L130     BoogieDeclarations]: Found specification of procedure mktemp
[2018-11-18 15:24:37,300 INFO  L130     BoogieDeclarations]: Found specification of procedure mkstemp
[2018-11-18 15:24:37,300 INFO  L130     BoogieDeclarations]: Found specification of procedure mkstemps
[2018-11-18 15:24:37,301 INFO  L130     BoogieDeclarations]: Found specification of procedure mkdtemp
[2018-11-18 15:24:37,301 INFO  L130     BoogieDeclarations]: Found specification of procedure system
[2018-11-18 15:24:37,301 INFO  L130     BoogieDeclarations]: Found specification of procedure realpath
[2018-11-18 15:24:37,301 INFO  L130     BoogieDeclarations]: Found specification of procedure bsearch
[2018-11-18 15:24:37,301 INFO  L130     BoogieDeclarations]: Found specification of procedure qsort
[2018-11-18 15:24:37,301 INFO  L130     BoogieDeclarations]: Found specification of procedure abs
[2018-11-18 15:24:37,301 INFO  L130     BoogieDeclarations]: Found specification of procedure labs
[2018-11-18 15:24:37,301 INFO  L130     BoogieDeclarations]: Found specification of procedure llabs
[2018-11-18 15:24:37,301 INFO  L130     BoogieDeclarations]: Found specification of procedure div
[2018-11-18 15:24:37,302 INFO  L130     BoogieDeclarations]: Found specification of procedure ldiv
[2018-11-18 15:24:37,302 INFO  L130     BoogieDeclarations]: Found specification of procedure lldiv
[2018-11-18 15:24:37,302 INFO  L130     BoogieDeclarations]: Found specification of procedure ecvt
[2018-11-18 15:24:37,302 INFO  L130     BoogieDeclarations]: Found specification of procedure fcvt
[2018-11-18 15:24:37,302 INFO  L130     BoogieDeclarations]: Found specification of procedure gcvt
[2018-11-18 15:24:37,302 INFO  L130     BoogieDeclarations]: Found specification of procedure qecvt
[2018-11-18 15:24:37,302 INFO  L130     BoogieDeclarations]: Found specification of procedure qfcvt
[2018-11-18 15:24:37,302 INFO  L130     BoogieDeclarations]: Found specification of procedure qgcvt
[2018-11-18 15:24:37,302 INFO  L130     BoogieDeclarations]: Found specification of procedure ecvt_r
[2018-11-18 15:24:37,302 INFO  L130     BoogieDeclarations]: Found specification of procedure fcvt_r
[2018-11-18 15:24:37,303 INFO  L130     BoogieDeclarations]: Found specification of procedure qecvt_r
[2018-11-18 15:24:37,303 INFO  L130     BoogieDeclarations]: Found specification of procedure qfcvt_r
[2018-11-18 15:24:37,303 INFO  L130     BoogieDeclarations]: Found specification of procedure mblen
[2018-11-18 15:24:37,303 INFO  L130     BoogieDeclarations]: Found specification of procedure mbtowc
[2018-11-18 15:24:37,303 INFO  L130     BoogieDeclarations]: Found specification of procedure wctomb
[2018-11-18 15:24:37,303 INFO  L130     BoogieDeclarations]: Found specification of procedure mbstowcs
[2018-11-18 15:24:37,303 INFO  L130     BoogieDeclarations]: Found specification of procedure wcstombs
[2018-11-18 15:24:37,303 INFO  L130     BoogieDeclarations]: Found specification of procedure rpmatch
[2018-11-18 15:24:37,303 INFO  L130     BoogieDeclarations]: Found specification of procedure getsubopt
[2018-11-18 15:24:37,304 INFO  L130     BoogieDeclarations]: Found specification of procedure getloadavg
[2018-11-18 15:24:37,304 INFO  L130     BoogieDeclarations]: Found specification of procedure sll_create
[2018-11-18 15:24:37,304 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.alloc
[2018-11-18 15:24:37,304 INFO  L130     BoogieDeclarations]: Found specification of procedure write~$Pointer$
[2018-11-18 15:24:37,304 INFO  L130     BoogieDeclarations]: Found specification of procedure sll_length
[2018-11-18 15:24:37,304 INFO  L130     BoogieDeclarations]: Found specification of procedure read~$Pointer$
[2018-11-18 15:24:37,304 INFO  L130     BoogieDeclarations]: Found specification of procedure sll_destroy
[2018-11-18 15:24:37,304 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc
[2018-11-18 15:24:37,304 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2018-11-18 15:24:37,304 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2018-11-18 15:24:37,305 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2018-11-18 15:24:37,591 INFO  L278             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2018-11-18 15:24:37,592 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 03:24:37 BoogieIcfgContainer
[2018-11-18 15:24:37,592 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2018-11-18 15:24:37,592 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2018-11-18 15:24:37,593 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2018-11-18 15:24:37,595 INFO  L276        PluginConnector]: TraceAbstraction initialized
[2018-11-18 15:24:37,595 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 03:24:36" (1/3) ...
[2018-11-18 15:24:37,596 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e208c8d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 03:24:37, skipping insertion in model container
[2018-11-18 15:24:37,596 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 03:24:37" (2/3) ...
[2018-11-18 15:24:37,596 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e208c8d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 03:24:37, skipping insertion in model container
[2018-11-18 15:24:37,597 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 03:24:37" (3/3) ...
[2018-11-18 15:24:37,598 INFO  L112   eAbstractionObserver]: Analyzing ICFG sll_length_check_false-unreach-call_false-valid-memcleanup.i
[2018-11-18 15:24:37,603 INFO  L136   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2018-11-18 15:24:37,608 INFO  L148   ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2018-11-18 15:24:37,617 INFO  L257      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2018-11-18 15:24:37,634 INFO  L133   ementStrategyFactory]: Using default assertion order modulation
[2018-11-18 15:24:37,635 INFO  L382      AbstractCegarLoop]: Interprodecural is true
[2018-11-18 15:24:37,635 INFO  L383      AbstractCegarLoop]: Hoare is true
[2018-11-18 15:24:37,635 INFO  L384      AbstractCegarLoop]: Compute interpolants for FPandBP
[2018-11-18 15:24:37,635 INFO  L385      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2018-11-18 15:24:37,635 INFO  L386      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2018-11-18 15:24:37,636 INFO  L387      AbstractCegarLoop]: Difference is false
[2018-11-18 15:24:37,636 INFO  L388      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2018-11-18 15:24:37,636 INFO  L393      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2018-11-18 15:24:37,651 INFO  L276                IsEmpty]: Start isEmpty. Operand 45 states.
[2018-11-18 15:24:37,655 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 24
[2018-11-18 15:24:37,655 INFO  L367         BasicCegarLoop]: Found error trace
[2018-11-18 15:24:37,656 INFO  L375         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]
[2018-11-18 15:24:37,657 INFO  L423      AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2018-11-18 15:24:37,662 INFO  L141       PredicateUnifier]: Initialized classic predicate unifier
[2018-11-18 15:24:37,662 INFO  L82        PathProgramCache]: Analyzing trace with hash 1270338, now seen corresponding path program 1 times
[2018-11-18 15:24:37,663 INFO  L223   ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-11-18 15:24:37,663 INFO  L69    tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-11-18 15:24:37,696 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-11-18 15:24:37,696 INFO  L103   rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2018-11-18 15:24:37,696 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-11-18 15:24:37,716 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-11-18 15:24:37,742 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-11-18 15:24:37,744 INFO  L312   seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2018-11-18 15:24:37,744 INFO  L327   seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2018-11-18 15:24:37,748 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 2 states
[2018-11-18 15:24:37,756 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants.
[2018-11-18 15:24:37,756 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2
[2018-11-18 15:24:37,757 INFO  L87              Difference]: Start difference. First operand 45 states. Second operand 2 states.
[2018-11-18 15:24:37,775 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-11-18 15:24:37,776 INFO  L93              Difference]: Finished difference Result 80 states and 98 transitions.
[2018-11-18 15:24:37,776 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. 
[2018-11-18 15:24:37,777 INFO  L78                 Accepts]: Start accepts. Automaton has 2 states. Word has length 23
[2018-11-18 15:24:37,777 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2018-11-18 15:24:37,783 INFO  L225             Difference]: With dead ends: 80
[2018-11-18 15:24:37,784 INFO  L226             Difference]: Without dead ends: 31
[2018-11-18 15:24:37,786 INFO  L604         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
[2018-11-18 15:24:37,797 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 31 states.
[2018-11-18 15:24:37,810 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31.
[2018-11-18 15:24:37,811 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 31 states.
[2018-11-18 15:24:37,811 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions.
[2018-11-18 15:24:37,812 INFO  L78                 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 23
[2018-11-18 15:24:37,813 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2018-11-18 15:24:37,813 INFO  L480      AbstractCegarLoop]: Abstraction has 31 states and 34 transitions.
[2018-11-18 15:24:37,813 INFO  L481      AbstractCegarLoop]: Interpolant automaton has 2 states.
[2018-11-18 15:24:37,813 INFO  L276                IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions.
[2018-11-18 15:24:37,813 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 29
[2018-11-18 15:24:37,813 INFO  L367         BasicCegarLoop]: Found error trace
[2018-11-18 15:24:37,814 INFO  L375         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]
[2018-11-18 15:24:37,814 INFO  L423      AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2018-11-18 15:24:37,814 INFO  L141       PredicateUnifier]: Initialized classic predicate unifier
[2018-11-18 15:24:37,814 INFO  L82        PathProgramCache]: Analyzing trace with hash 256070974, now seen corresponding path program 1 times
[2018-11-18 15:24:37,814 INFO  L223   ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-11-18 15:24:37,814 INFO  L69    tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-11-18 15:24:37,815 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-11-18 15:24:37,816 INFO  L103   rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2018-11-18 15:24:37,816 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-11-18 15:24:37,836 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-11-18 15:24:37,892 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-11-18 15:24:37,892 INFO  L312   seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2018-11-18 15:24:37,893 INFO  L327   seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2018-11-18 15:24:37,894 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 5 states
[2018-11-18 15:24:37,894 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2018-11-18 15:24:37,894 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2018-11-18 15:24:37,894 INFO  L87              Difference]: Start difference. First operand 31 states and 34 transitions. Second operand 5 states.
[2018-11-18 15:24:37,954 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-11-18 15:24:37,954 INFO  L93              Difference]: Finished difference Result 50 states and 54 transitions.
[2018-11-18 15:24:37,954 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2018-11-18 15:24:37,954 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 28
[2018-11-18 15:24:37,954 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2018-11-18 15:24:37,955 INFO  L225             Difference]: With dead ends: 50
[2018-11-18 15:24:37,955 INFO  L226             Difference]: Without dead ends: 35
[2018-11-18 15:24:37,955 INFO  L604         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
[2018-11-18 15:24:37,956 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 35 states.
[2018-11-18 15:24:37,958 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33.
[2018-11-18 15:24:37,958 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 33 states.
[2018-11-18 15:24:37,959 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions.
[2018-11-18 15:24:37,959 INFO  L78                 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 28
[2018-11-18 15:24:37,959 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2018-11-18 15:24:37,959 INFO  L480      AbstractCegarLoop]: Abstraction has 33 states and 36 transitions.
[2018-11-18 15:24:37,959 INFO  L481      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2018-11-18 15:24:37,959 INFO  L276                IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions.
[2018-11-18 15:24:37,960 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 33
[2018-11-18 15:24:37,960 INFO  L367         BasicCegarLoop]: Found error trace
[2018-11-18 15:24:37,960 INFO  L375         BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1]
[2018-11-18 15:24:37,960 INFO  L423      AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2018-11-18 15:24:37,960 INFO  L141       PredicateUnifier]: Initialized classic predicate unifier
[2018-11-18 15:24:37,960 INFO  L82        PathProgramCache]: Analyzing trace with hash -36569594, now seen corresponding path program 1 times
[2018-11-18 15:24:37,960 INFO  L223   ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-11-18 15:24:37,960 INFO  L69    tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-11-18 15:24:37,961 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-11-18 15:24:37,961 INFO  L103   rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2018-11-18 15:24:37,961 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-11-18 15:24:37,974 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-11-18 15:24:38,046 INFO  L134       CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-11-18 15:24:38,046 INFO  L312   seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2018-11-18 15:24:38,047 INFO  L327   seRefinementStrategy]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9
[2018-11-18 15:24:38,047 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 9 states
[2018-11-18 15:24:38,047 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants.
[2018-11-18 15:24:38,047 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72
[2018-11-18 15:24:38,048 INFO  L87              Difference]: Start difference. First operand 33 states and 36 transitions. Second operand 9 states.
[2018-11-18 15:24:38,126 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-11-18 15:24:38,126 INFO  L93              Difference]: Finished difference Result 44 states and 47 transitions.
[2018-11-18 15:24:38,127 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. 
[2018-11-18 15:24:38,127 INFO  L78                 Accepts]: Start accepts. Automaton has 9 states. Word has length 32
[2018-11-18 15:24:38,127 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2018-11-18 15:24:38,127 INFO  L225             Difference]: With dead ends: 44
[2018-11-18 15:24:38,127 INFO  L226             Difference]: Without dead ends: 37
[2018-11-18 15:24:38,128 INFO  L604         BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132
[2018-11-18 15:24:38,128 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 37 states.
[2018-11-18 15:24:38,131 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35.
[2018-11-18 15:24:38,131 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 35 states.
[2018-11-18 15:24:38,132 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions.
[2018-11-18 15:24:38,132 INFO  L78                 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 32
[2018-11-18 15:24:38,132 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2018-11-18 15:24:38,132 INFO  L480      AbstractCegarLoop]: Abstraction has 35 states and 38 transitions.
[2018-11-18 15:24:38,132 INFO  L481      AbstractCegarLoop]: Interpolant automaton has 9 states.
[2018-11-18 15:24:38,132 INFO  L276                IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions.
[2018-11-18 15:24:38,133 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 35
[2018-11-18 15:24:38,133 INFO  L367         BasicCegarLoop]: Found error trace
[2018-11-18 15:24:38,133 INFO  L375         BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1]
[2018-11-18 15:24:38,133 INFO  L423      AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2018-11-18 15:24:38,134 INFO  L141       PredicateUnifier]: Initialized classic predicate unifier
[2018-11-18 15:24:38,134 INFO  L82        PathProgramCache]: Analyzing trace with hash -229115284, now seen corresponding path program 1 times
[2018-11-18 15:24:38,134 INFO  L223   ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-11-18 15:24:38,134 INFO  L69    tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-11-18 15:24:38,135 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-11-18 15:24:38,135 INFO  L103   rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2018-11-18 15:24:38,135 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-11-18 15:24:38,146 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-11-18 15:24:38,190 INFO  L134       CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked.
[2018-11-18 15:24:38,190 INFO  L300   seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-11-18 15:24:38,190 INFO  L223   ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e06f2b99-acb1-45f9-bdb8-a40a018ccb20/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
[2018-11-18 15:24:38,204 INFO  L103   rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2018-11-18 15:24:38,232 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-11-18 15:24:38,239 INFO  L273         TraceCheckSpWp]: Computing forward predicates...
[2018-11-18 15:24:38,266 INFO  L134       CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked.
[2018-11-18 15:24:38,290 INFO  L312   seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-11-18 15:24:38,290 INFO  L327   seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6
[2018-11-18 15:24:38,290 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 6 states
[2018-11-18 15:24:38,290 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2018-11-18 15:24:38,290 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30
[2018-11-18 15:24:38,291 INFO  L87              Difference]: Start difference. First operand 35 states and 38 transitions. Second operand 6 states.
[2018-11-18 15:24:38,350 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-11-18 15:24:38,350 INFO  L93              Difference]: Finished difference Result 58 states and 62 transitions.
[2018-11-18 15:24:38,351 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2018-11-18 15:24:38,351 INFO  L78                 Accepts]: Start accepts. Automaton has 6 states. Word has length 34
[2018-11-18 15:24:38,351 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2018-11-18 15:24:38,352 INFO  L225             Difference]: With dead ends: 58
[2018-11-18 15:24:38,352 INFO  L226             Difference]: Without dead ends: 41
[2018-11-18 15:24:38,352 INFO  L604         BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42
[2018-11-18 15:24:38,352 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 41 states.
[2018-11-18 15:24:38,355 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39.
[2018-11-18 15:24:38,355 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 39 states.
[2018-11-18 15:24:38,356 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions.
[2018-11-18 15:24:38,356 INFO  L78                 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 34
[2018-11-18 15:24:38,356 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2018-11-18 15:24:38,356 INFO  L480      AbstractCegarLoop]: Abstraction has 39 states and 42 transitions.
[2018-11-18 15:24:38,356 INFO  L481      AbstractCegarLoop]: Interpolant automaton has 6 states.
[2018-11-18 15:24:38,356 INFO  L276                IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions.
[2018-11-18 15:24:38,357 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 39
[2018-11-18 15:24:38,357 INFO  L367         BasicCegarLoop]: Found error trace
[2018-11-18 15:24:38,357 INFO  L375         BasicCegarLoop]: trace histogram [3, 2, 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, 1]
[2018-11-18 15:24:38,358 INFO  L423      AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2018-11-18 15:24:38,358 INFO  L141       PredicateUnifier]: Initialized classic predicate unifier
[2018-11-18 15:24:38,358 INFO  L82        PathProgramCache]: Analyzing trace with hash -1457066700, now seen corresponding path program 2 times
[2018-11-18 15:24:38,358 INFO  L223   ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-11-18 15:24:38,358 INFO  L69    tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-11-18 15:24:38,359 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-11-18 15:24:38,359 INFO  L103   rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2018-11-18 15:24:38,359 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-11-18 15:24:38,370 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-11-18 15:24:38,480 INFO  L134       CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-11-18 15:24:38,481 INFO  L300   seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-11-18 15:24:38,481 INFO  L223   ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e06f2b99-acb1-45f9-bdb8-a40a018ccb20/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
[2018-11-18 15:24:38,498 INFO  L103   rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1
[2018-11-18 15:24:38,523 INFO  L249   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2018-11-18 15:24:38,523 INFO  L250   tOrderPrioritization]: Conjunction of SSA is unsat
[2018-11-18 15:24:38,525 INFO  L273         TraceCheckSpWp]: Computing forward predicates...
[2018-11-18 15:24:38,620 INFO  L134       CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked.
[2018-11-18 15:24:38,635 INFO  L312   seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-11-18 15:24:38,636 INFO  L327   seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7] total 16
[2018-11-18 15:24:38,636 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 16 states
[2018-11-18 15:24:38,636 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants.
[2018-11-18 15:24:38,636 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240
[2018-11-18 15:24:38,637 INFO  L87              Difference]: Start difference. First operand 39 states and 42 transitions. Second operand 16 states.
[2018-11-18 15:24:38,884 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-11-18 15:24:38,884 INFO  L93              Difference]: Finished difference Result 67 states and 72 transitions.
[2018-11-18 15:24:38,884 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. 
[2018-11-18 15:24:38,884 INFO  L78                 Accepts]: Start accepts. Automaton has 16 states. Word has length 38
[2018-11-18 15:24:38,885 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2018-11-18 15:24:38,885 INFO  L225             Difference]: With dead ends: 67
[2018-11-18 15:24:38,885 INFO  L226             Difference]: Without dead ends: 47
[2018-11-18 15:24:38,886 INFO  L604         BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=554, Unknown=0, NotChecked=0, Total=650
[2018-11-18 15:24:38,886 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 47 states.
[2018-11-18 15:24:38,889 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45.
[2018-11-18 15:24:38,889 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 45 states.
[2018-11-18 15:24:38,889 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 48 transitions.
[2018-11-18 15:24:38,889 INFO  L78                 Accepts]: Start accepts. Automaton has 45 states and 48 transitions. Word has length 38
[2018-11-18 15:24:38,890 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2018-11-18 15:24:38,890 INFO  L480      AbstractCegarLoop]: Abstraction has 45 states and 48 transitions.
[2018-11-18 15:24:38,890 INFO  L481      AbstractCegarLoop]: Interpolant automaton has 16 states.
[2018-11-18 15:24:38,890 INFO  L276                IsEmpty]: Start isEmpty. Operand 45 states and 48 transitions.
[2018-11-18 15:24:38,891 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 45
[2018-11-18 15:24:38,891 INFO  L367         BasicCegarLoop]: Found error trace
[2018-11-18 15:24:38,891 INFO  L375         BasicCegarLoop]: trace histogram [4, 3, 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, 1]
[2018-11-18 15:24:38,891 INFO  L423      AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2018-11-18 15:24:38,891 INFO  L141       PredicateUnifier]: Initialized classic predicate unifier
[2018-11-18 15:24:38,892 INFO  L82        PathProgramCache]: Analyzing trace with hash -128085278, now seen corresponding path program 3 times
[2018-11-18 15:24:38,892 INFO  L223   ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-11-18 15:24:38,892 INFO  L69    tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-11-18 15:24:38,893 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-11-18 15:24:38,893 INFO  L101   rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2018-11-18 15:24:38,893 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-11-18 15:24:38,906 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2018-11-18 15:24:39,070 INFO  L134       CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2018-11-18 15:24:39,071 INFO  L300   seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more.
[2018-11-18 15:24:39,071 INFO  L223   ckRefinementStrategy]: Switched to mode Z3_FP
No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e06f2b99-acb1-45f9-bdb8-a40a018ccb20/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
[2018-11-18 15:24:39,078 INFO  L103   rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2
[2018-11-18 15:24:39,094 INFO  L249   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s)
[2018-11-18 15:24:39,094 INFO  L250   tOrderPrioritization]: Conjunction of SSA is unsat
[2018-11-18 15:24:39,097 INFO  L273         TraceCheckSpWp]: Computing forward predicates...
[2018-11-18 15:24:39,170 INFO  L134       CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked.
[2018-11-18 15:24:39,186 INFO  L312   seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2018-11-18 15:24:39,186 INFO  L327   seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 8] total 21
[2018-11-18 15:24:39,186 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 21 states
[2018-11-18 15:24:39,187 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants.
[2018-11-18 15:24:39,187 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=379, Unknown=0, NotChecked=0, Total=420
[2018-11-18 15:24:39,187 INFO  L87              Difference]: Start difference. First operand 45 states and 48 transitions. Second operand 21 states.
[2018-11-18 15:24:39,548 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2018-11-18 15:24:39,548 INFO  L93              Difference]: Finished difference Result 67 states and 74 transitions.
[2018-11-18 15:24:39,548 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. 
[2018-11-18 15:24:39,548 INFO  L78                 Accepts]: Start accepts. Automaton has 21 states. Word has length 44
[2018-11-18 15:24:39,548 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2018-11-18 15:24:39,550 INFO  L225             Difference]: With dead ends: 67
[2018-11-18 15:24:39,550 INFO  L226             Difference]: Without dead ends: 60
[2018-11-18 15:24:39,550 INFO  L604         BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=118, Invalid=938, Unknown=0, NotChecked=0, Total=1056
[2018-11-18 15:24:39,551 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 60 states.
[2018-11-18 15:24:39,558 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 47.
[2018-11-18 15:24:39,558 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 47 states.
[2018-11-18 15:24:39,558 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 50 transitions.
[2018-11-18 15:24:39,558 INFO  L78                 Accepts]: Start accepts. Automaton has 47 states and 50 transitions. Word has length 44
[2018-11-18 15:24:39,559 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2018-11-18 15:24:39,559 INFO  L480      AbstractCegarLoop]: Abstraction has 47 states and 50 transitions.
[2018-11-18 15:24:39,559 INFO  L481      AbstractCegarLoop]: Interpolant automaton has 21 states.
[2018-11-18 15:24:39,559 INFO  L276                IsEmpty]: Start isEmpty. Operand 47 states and 50 transitions.
[2018-11-18 15:24:39,559 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 47
[2018-11-18 15:24:39,559 INFO  L367         BasicCegarLoop]: Found error trace
[2018-11-18 15:24:39,559 INFO  L375         BasicCegarLoop]: trace histogram [4, 4, 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, 1]
[2018-11-18 15:24:39,559 INFO  L423      AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2018-11-18 15:24:39,559 INFO  L141       PredicateUnifier]: Initialized classic predicate unifier
[2018-11-18 15:24:39,560 INFO  L82        PathProgramCache]: Analyzing trace with hash 2018625608, now seen corresponding path program 4 times
[2018-11-18 15:24:39,560 INFO  L223   ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS
[2018-11-18 15:24:39,560 INFO  L69    tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy
[2018-11-18 15:24:39,560 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-11-18 15:24:39,560 INFO  L101   rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2018-11-18 15:24:39,560 INFO  L119   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2018-11-18 15:24:39,574 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is sat
[2018-11-18 15:24:39,586 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is sat
[2018-11-18 15:24:39,600 INFO  L442         BasicCegarLoop]: Counterexample might be feasible
[2018-11-18 15:24:39,625 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.11 03:24:39 BoogieIcfgContainer
[2018-11-18 15:24:39,625 INFO  L132        PluginConnector]: ------------------------ END TraceAbstraction----------------------------
[2018-11-18 15:24:39,626 INFO  L113        PluginConnector]: ------------------------Witness Printer----------------------------
[2018-11-18 15:24:39,626 INFO  L271        PluginConnector]: Initializing Witness Printer...
[2018-11-18 15:24:39,626 INFO  L276        PluginConnector]: Witness Printer initialized
[2018-11-18 15:24:39,626 INFO  L185        PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 03:24:37" (3/4) ...
[2018-11-18 15:24:39,628 INFO  L138         WitnessPrinter]: Generating witness for reachability counterexample
[2018-11-18 15:24:39,667 INFO  L145         WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_e06f2b99-acb1-45f9-bdb8-a40a018ccb20/bin-2019/uautomizer/witness.graphml
[2018-11-18 15:24:39,667 INFO  L132        PluginConnector]: ------------------------ END Witness Printer----------------------------
[2018-11-18 15:24:39,668 INFO  L168              Benchmark]: Toolchain (without parser) took 2827.94 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 213.9 MB). Free memory was 956.6 MB in the beginning and 1.1 GB in the end (delta: -179.2 MB). Peak memory consumption was 34.7 MB. Max. memory is 11.5 GB.
[2018-11-18 15:24:39,669 INFO  L168              Benchmark]: CDTParser took 0.10 ms. Allocated memory is still 1.0 GB. Free memory is still 985.5 MB. There was no memory consumed. Max. memory is 11.5 GB.
[2018-11-18 15:24:39,669 INFO  L168              Benchmark]: CACSL2BoogieTranslator took 332.44 ms. Allocated memory is still 1.0 GB. Free memory was 956.6 MB in the beginning and 929.7 MB in the end (delta: 26.8 MB). Peak memory consumption was 26.8 MB. Max. memory is 11.5 GB.
[2018-11-18 15:24:39,670 INFO  L168              Benchmark]: Boogie Preprocessor took 79.41 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 147.3 MB). Free memory was 929.7 MB in the beginning and 1.1 GB in the end (delta: -212.0 MB). Peak memory consumption was 15.4 MB. Max. memory is 11.5 GB.
[2018-11-18 15:24:39,670 INFO  L168              Benchmark]: RCFGBuilder took 338.05 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: 43.7 MB). Peak memory consumption was 43.7 MB. Max. memory is 11.5 GB.
[2018-11-18 15:24:39,670 INFO  L168              Benchmark]: TraceAbstraction took 2033.02 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 66.6 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: -37.8 MB). Peak memory consumption was 28.8 MB. Max. memory is 11.5 GB.
[2018-11-18 15:24:39,671 INFO  L168              Benchmark]: Witness Printer took 41.76 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.
[2018-11-18 15:24:39,672 INFO  L336   ainManager$Toolchain]: #######################  End [Toolchain 1] #######################
 --- Results ---
 * Results from de.uni_freiburg.informatik.ultimate.core:
  - StatisticsResult: Toolchain Benchmarks
    Benchmark results are:
 * CDTParser took 0.10 ms. Allocated memory is still 1.0 GB. Free memory is still 985.5 MB. There was no memory consumed. Max. memory is 11.5 GB.
 * CACSL2BoogieTranslator took 332.44 ms. Allocated memory is still 1.0 GB. Free memory was 956.6 MB in the beginning and 929.7 MB in the end (delta: 26.8 MB). Peak memory consumption was 26.8 MB. Max. memory is 11.5 GB.
 * Boogie Preprocessor took 79.41 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 147.3 MB). Free memory was 929.7 MB in the beginning and 1.1 GB in the end (delta: -212.0 MB). Peak memory consumption was 15.4 MB. Max. memory is 11.5 GB.
 * RCFGBuilder took 338.05 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: 43.7 MB). Peak memory consumption was 43.7 MB. Max. memory is 11.5 GB.
 * TraceAbstraction took 2033.02 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 66.6 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: -37.8 MB). Peak memory consumption was 28.8 MB. Max. memory is 11.5 GB.
 * Witness Printer took 41.76 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.
 * 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]  EXPR, FCALL  malloc(sizeof(struct node))
[L566]               SLL new_head = (SLL) malloc(sizeof(struct node));
        VAL          [\old(len)=3, head={0:0}, len=3, malloc(sizeof(struct node))={6:0}, new_head={6:0}]
[L567]  COND FALSE   !(((void *)0) == new_head)
        VAL          [\old(len)=3, head={0:0}, len=3, malloc(sizeof(struct node))={6:0}, new_head={6:0}]
[L570]  FCALL        new_head->next = head
[L571]               head = new_head
[L572]               len--
        VAL          [\old(len)=3, head={6:0}, len=2, malloc(sizeof(struct node))={6:0}, new_head={6:0}]
[L565]  COND TRUE    len > 0
[L566]  EXPR, FCALL  malloc(sizeof(struct node))
[L566]               SLL new_head = (SLL) malloc(sizeof(struct node));
        VAL          [\old(len)=3, head={6:0}, len=2, malloc(sizeof(struct node))={7:0}, new_head={7:0}]
[L567]  COND FALSE   !(((void *)0) == new_head)
        VAL          [\old(len)=3, head={6:0}, len=2, malloc(sizeof(struct node))={7:0}, new_head={7:0}]
[L570]  FCALL        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]  EXPR, FCALL  malloc(sizeof(struct node))
[L566]               SLL new_head = (SLL) malloc(sizeof(struct node));
        VAL          [\old(len)=3, head={7:0}, len=1, malloc(sizeof(struct node))={9:0}, new_head={9:0}]
[L567]  COND FALSE   !(((void *)0) == new_head)
        VAL          [\old(len)=3, head={7:0}, len=1, malloc(sizeof(struct node))={9:0}, new_head={9:0}]
[L570]  FCALL        new_head->next = head
[L571]               head = new_head
[L572]               len--
        VAL          [\old(len)=3, head={9:0}, len=0, malloc(sizeof(struct node))={9:0}, new_head={9:0}]
[L565]  COND FALSE   !(len > 0)
        VAL          [\old(len)=3, head={9:0}, len=0, malloc(sizeof(struct node))={9:0}, new_head={9:0}]
[L574]  RET          return head;
        VAL          [\old(len)=3, \result={9:0}, head={9:0}, len=0, malloc(sizeof(struct node))={9:0}, new_head={9:0}]
[L596]  EXPR         sll_create(len + 1)
        VAL          [len=2, sll_create(len + 1)={9:0}]
[L596]               SLL s = sll_create(len + 1);
[L597]  CALL, EXPR   sll_length(s)
        VAL          [head={9:0}]
[L577]               int len = 0;
        VAL          [head={9:0}, head={9:0}, len=0]
[L578]  COND TRUE    \read(head)
[L579]               len++
[L580]  EXPR, FCALL  head->next
[L580]               head = head->next
[L578]  COND TRUE    \read(head)
[L579]               len++
[L580]  EXPR, FCALL  head->next
[L580]               head = head->next
[L578]  COND TRUE    \read(head)
[L579]               len++
[L580]  EXPR, FCALL  head->next
[L580]               head = head->next
[L578]  COND FALSE   !(\read(head))
        VAL          [head={0:0}, head={9:0}, len=3]
[L582]  RET          return len;
        VAL          [\result=3, head={9:0}, head={0:0}, len=3]
[L597]  EXPR         sll_length(s)
        VAL          [len=2, s={9:0}, sll_length(s)=3]
[L597]  COND TRUE    len != sll_length(s)
[L602]               __VERIFIER_error()
        VAL          [len=2, s={9:0}]

  - StatisticsResult: Ultimate Automizer benchmark data
    CFG has 9 procedures, 53 locations, 1 error locations. UNSAFE Result, 1.9s OverallTime, 7 OverallIterations, 4 TraceHistogramMax, 0.8s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 193 SDtfs, 116 SDslu, 1122 SDs, 0 SdLazy, 729 SolverSat, 21 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 192 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.7s 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, 21 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 361 NumberOfCodeBlocks, 357 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 306 ConstructedInterpolants, 0 QuantifiedInterpolants, 35231 SizeOfPredicates, 5 NumberOfNonLiveVariables, 427 ConjunctsInSsa, 24 ConjunctsInUnsatCore, 9 InterpolantComputations, 3 PerfectInterpolantSequences, 36/78 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available
RESULT: Ultimate proved your program to be incorrect!
Received shutdown request...