./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/list-ext3-properties/sll_length_check-1.i --full-output --architecture 32bit


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


Checking for ERROR reachability
Using default analysis
Version f470102c
Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_d975736a-a8b5-408e-a8a9-c1bcb9b25f06/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_d975736a-a8b5-408e-a8a9-c1bcb9b25f06/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_d975736a-a8b5-408e-a8a9-c1bcb9b25f06/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_d975736a-a8b5-408e-a8a9-c1bcb9b25f06/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/list-ext3-properties/sll_length_check-1.i -s /tmp/vcloud-vcloud-master/worker/run_dir_d975736a-a8b5-408e-a8a9-c1bcb9b25f06/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_d975736a-a8b5-408e-a8a9-c1bcb9b25f06/bin/utaipan --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 Taipan --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 0.1.25-f470102
[2019-12-07 12:42:49,000 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2019-12-07 12:42:49,001 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2019-12-07 12:42:49,010 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2019-12-07 12:42:49,010 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2019-12-07 12:42:49,011 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2019-12-07 12:42:49,012 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2019-12-07 12:42:49,014 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2019-12-07 12:42:49,015 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2019-12-07 12:42:49,016 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
[2019-12-07 12:42:49,017 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
[2019-12-07 12:42:49,018 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2019-12-07 12:42:49,018 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2019-12-07 12:42:49,019 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2019-12-07 12:42:49,020 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2019-12-07 12:42:49,021 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2019-12-07 12:42:49,022 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2019-12-07 12:42:49,023 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2019-12-07 12:42:49,024 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2019-12-07 12:42:49,026 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2019-12-07 12:42:49,028 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2019-12-07 12:42:49,029 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2019-12-07 12:42:49,030 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2019-12-07 12:42:49,030 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2019-12-07 12:42:49,032 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2019-12-07 12:42:49,032 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2019-12-07 12:42:49,033 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2019-12-07 12:42:49,033 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2019-12-07 12:42:49,034 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2019-12-07 12:42:49,034 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2019-12-07 12:42:49,035 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2019-12-07 12:42:49,035 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2019-12-07 12:42:49,036 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2019-12-07 12:42:49,036 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2019-12-07 12:42:49,037 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2019-12-07 12:42:49,037 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
[2019-12-07 12:42:49,038 INFO  L184        SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2019-12-07 12:42:49,038 INFO  L184        SettingsManager]: ReqParser provides no preferences, ignoring...
[2019-12-07 12:42:49,038 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
[2019-12-07 12:42:49,039 INFO  L181        SettingsManager]: Resetting Witness Parser preferences to default values
[2019-12-07 12:42:49,039 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2019-12-07 12:42:49,040 INFO  L101        SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_d975736a-a8b5-408e-a8a9-c1bcb9b25f06/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf
[2019-12-07 12:42:49,052 INFO  L113        SettingsManager]: Loading preferences was successful
[2019-12-07 12:42:49,053 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2019-12-07 12:42:49,053 INFO  L136        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2019-12-07 12:42:49,053 INFO  L138        SettingsManager]:  * User list type=DISABLED
[2019-12-07 12:42:49,053 INFO  L136        SettingsManager]: Preferences of Abstract Interpretation differ from their defaults:
[2019-12-07 12:42:49,054 INFO  L138        SettingsManager]:  * Explicit value domain=true
[2019-12-07 12:42:49,054 INFO  L138        SettingsManager]:  * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain
[2019-12-07 12:42:49,054 INFO  L138        SettingsManager]:  * Octagon Domain=false
[2019-12-07 12:42:49,054 INFO  L138        SettingsManager]:  * Abstract domain=CompoundDomain
[2019-12-07 12:42:49,054 INFO  L138        SettingsManager]:  * Check feasibility of abstract posts with an SMT solver=true
[2019-12-07 12:42:49,054 INFO  L138        SettingsManager]:  * Use the RCFG-of-the-future interface=true
[2019-12-07 12:42:49,054 INFO  L138        SettingsManager]:  * Interval Domain=false
[2019-12-07 12:42:49,055 INFO  L136        SettingsManager]: Preferences of Sifa differ from their defaults:
[2019-12-07 12:42:49,055 INFO  L138        SettingsManager]:  * Call Summarizer=TopInputCallSummarizer
[2019-12-07 12:42:49,055 INFO  L138        SettingsManager]:  * Simplification Technique=SIMPLIFY_QUICK
[2019-12-07 12:42:49,056 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2019-12-07 12:42:49,056 INFO  L138        SettingsManager]:  * sizeof long=4
[2019-12-07 12:42:49,056 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2019-12-07 12:42:49,056 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2019-12-07 12:42:49,056 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2019-12-07 12:42:49,056 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2019-12-07 12:42:49,056 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2019-12-07 12:42:49,056 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2019-12-07 12:42:49,056 INFO  L138        SettingsManager]:  * Adapt memory model on pointer casts if necessary=true
[2019-12-07 12:42:49,057 INFO  L138        SettingsManager]:  * sizeof long double=12
[2019-12-07 12:42:49,057 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2019-12-07 12:42:49,057 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2019-12-07 12:42:49,057 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2019-12-07 12:42:49,057 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2019-12-07 12:42:49,057 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2019-12-07 12:42:49,057 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2019-12-07 12:42:49,057 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2019-12-07 12:42:49,057 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2019-12-07 12:42:49,058 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2019-12-07 12:42:49,058 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2019-12-07 12:42:49,058 INFO  L138        SettingsManager]:  * Trace refinement strategy=SIFA_TAIPAN
[2019-12-07 12:42:49,058 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2019-12-07 12:42:49,058 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2019-12-07 12:42:49,058 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2019-12-07 12:42:49,058 INFO  L138        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2019-12-07 12:42:49,058 INFO  L138        SettingsManager]:  * Abstract interpretation Mode=USE_PREDICATES
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_d975736a-a8b5-408e-a8a9-c1bcb9b25f06/bin/utaipan
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 -> Taipan
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
[2019-12-07 12:42:49,166 INFO  L81    nceAwareModelManager]: Repository-Root is: /tmp
[2019-12-07 12:42:49,174 INFO  L258   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2019-12-07 12:42:49,176 INFO  L214   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2019-12-07 12:42:49,177 INFO  L271        PluginConnector]: Initializing CDTParser...
[2019-12-07 12:42:49,177 INFO  L275        PluginConnector]: CDTParser initialized
[2019-12-07 12:42:49,178 INFO  L428   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_d975736a-a8b5-408e-a8a9-c1bcb9b25f06/bin/utaipan/../../sv-benchmarks/c/list-ext3-properties/sll_length_check-1.i
[2019-12-07 12:42:49,214 INFO  L220              CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_d975736a-a8b5-408e-a8a9-c1bcb9b25f06/bin/utaipan/data/d05a9cada/ca1edd79b8564f2d9a64b4cd5aeda85f/FLAGb4eed0370
[2019-12-07 12:42:49,694 INFO  L306              CDTParser]: Found 1 translation units.
[2019-12-07 12:42:49,694 INFO  L160              CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_d975736a-a8b5-408e-a8a9-c1bcb9b25f06/sv-benchmarks/c/list-ext3-properties/sll_length_check-1.i
[2019-12-07 12:42:49,704 INFO  L349              CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_d975736a-a8b5-408e-a8a9-c1bcb9b25f06/bin/utaipan/data/d05a9cada/ca1edd79b8564f2d9a64b4cd5aeda85f/FLAGb4eed0370
[2019-12-07 12:42:50,199 INFO  L357              CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_d975736a-a8b5-408e-a8a9-c1bcb9b25f06/bin/utaipan/data/d05a9cada/ca1edd79b8564f2d9a64b4cd5aeda85f
[2019-12-07 12:42:50,202 INFO  L296   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2019-12-07 12:42:50,203 INFO  L131        ToolchainWalker]: Walking toolchain with 6 elements.
[2019-12-07 12:42:50,203 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2019-12-07 12:42:50,204 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2019-12-07 12:42:50,206 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2019-12-07 12:42:50,207 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 12:42:50" (1/1) ...
[2019-12-07 12:42:50,209 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f115626 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:42:50, skipping insertion in model container
[2019-12-07 12:42:50,209 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 12:42:50" (1/1) ...
[2019-12-07 12:42:50,214 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2019-12-07 12:42:50,241 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2019-12-07 12:42:50,459 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2019-12-07 12:42:50,464 INFO  L203         MainTranslator]: Completed pre-run
[2019-12-07 12:42:50,490 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2019-12-07 12:42:50,522 INFO  L208         MainTranslator]: Completed translation
[2019-12-07 12:42:50,522 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:42:50 WrapperNode
[2019-12-07 12:42:50,522 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2019-12-07 12:42:50,523 INFO  L113        PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2019-12-07 12:42:50,523 INFO  L271        PluginConnector]: Initializing Boogie Procedure Inliner...
[2019-12-07 12:42:50,523 INFO  L275        PluginConnector]: Boogie Procedure Inliner initialized
[2019-12-07 12:42:50,528 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:42:50" (1/1) ...
[2019-12-07 12:42:50,537 INFO  L185        PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:42:50" (1/1) ...
[2019-12-07 12:42:50,551 INFO  L132        PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2019-12-07 12:42:50,551 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2019-12-07 12:42:50,551 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2019-12-07 12:42:50,551 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2019-12-07 12:42:50,557 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:42:50" (1/1) ...
[2019-12-07 12:42:50,557 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:42:50" (1/1) ...
[2019-12-07 12:42:50,559 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:42:50" (1/1) ...
[2019-12-07 12:42:50,560 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:42:50" (1/1) ...
[2019-12-07 12:42:50,563 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:42:50" (1/1) ...
[2019-12-07 12:42:50,566 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:42:50" (1/1) ...
[2019-12-07 12:42:50,568 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:42:50" (1/1) ...
[2019-12-07 12:42:50,569 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2019-12-07 12:42:50,570 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2019-12-07 12:42:50,570 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2019-12-07 12:42:50,570 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2019-12-07 12:42:50,570 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:42:50" (1/1) ...
No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d975736a-a8b5-408e-a8a9-c1bcb9b25f06/bin/utaipan/z3
Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2019-12-07 12:42:50,611 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap
[2019-12-07 12:42:50,611 INFO  L130     BoogieDeclarations]: Found specification of procedure write~$Pointer$
[2019-12-07 12:42:50,611 INFO  L130     BoogieDeclarations]: Found specification of procedure read~$Pointer$
[2019-12-07 12:42:50,611 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc
[2019-12-07 12:42:50,611 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2019-12-07 12:42:50,611 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2019-12-07 12:42:50,818 INFO  L282             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2019-12-07 12:42:50,818 INFO  L287             CfgBuilder]: Removed 16 assume(true) statements.
[2019-12-07 12:42:50,819 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 12:42:50 BoogieIcfgContainer
[2019-12-07 12:42:50,819 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2019-12-07 12:42:50,820 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2019-12-07 12:42:50,820 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2019-12-07 12:42:50,822 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2019-12-07 12:42:50,822 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 12:42:50" (1/3) ...
[2019-12-07 12:42:50,823 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@550ca331 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 12:42:50, skipping insertion in model container
[2019-12-07 12:42:50,823 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:42:50" (2/3) ...
[2019-12-07 12:42:50,823 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@550ca331 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 12:42:50, skipping insertion in model container
[2019-12-07 12:42:50,823 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 12:42:50" (3/3) ...
[2019-12-07 12:42:50,824 INFO  L109   eAbstractionObserver]: Analyzing ICFG sll_length_check-1.i
[2019-12-07 12:42:50,831 INFO  L156   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2019-12-07 12:42:50,835 INFO  L168   ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2019-12-07 12:42:50,842 INFO  L249      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2019-12-07 12:42:50,856 INFO  L373      AbstractCegarLoop]: Interprodecural is true
[2019-12-07 12:42:50,856 INFO  L374      AbstractCegarLoop]: Hoare is true
[2019-12-07 12:42:50,856 INFO  L375      AbstractCegarLoop]: Compute interpolants for FPandBP
[2019-12-07 12:42:50,857 INFO  L376      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2019-12-07 12:42:50,857 INFO  L377      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2019-12-07 12:42:50,857 INFO  L378      AbstractCegarLoop]: Difference is false
[2019-12-07 12:42:50,857 INFO  L379      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2019-12-07 12:42:50,857 INFO  L383      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2019-12-07 12:42:50,865 INFO  L276                IsEmpty]: Start isEmpty. Operand 14 states.
[2019-12-07 12:42:50,869 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 8
[2019-12-07 12:42:50,869 INFO  L402         BasicCegarLoop]: Found error trace
[2019-12-07 12:42:50,870 INFO  L410         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1]
[2019-12-07 12:42:50,870 INFO  L410      AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-12-07 12:42:50,873 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-12-07 12:42:50,873 INFO  L82        PathProgramCache]: Analyzing trace with hash 1354453038, now seen corresponding path program 1 times
[2019-12-07 12:42:50,879 INFO  L163   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2019-12-07 12:42:50,879 INFO  L348   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579687566]
[2019-12-07 12:42:50,880 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-12-07 12:42:50,933 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-12-07 12:42:50,952 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-12-07 12:42:50,953 INFO  L348   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579687566]
[2019-12-07 12:42:50,953 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-12-07 12:42:50,953 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2019-12-07 12:42:50,954 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121729519]
[2019-12-07 12:42:50,957 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 2 states
[2019-12-07 12:42:50,957 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2019-12-07 12:42:50,965 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants.
[2019-12-07 12:42:50,966 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2
[2019-12-07 12:42:50,967 INFO  L87              Difference]: Start difference. First operand 14 states. Second operand 2 states.
[2019-12-07 12:42:50,978 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-12-07 12:42:50,978 INFO  L93              Difference]: Finished difference Result 25 states and 35 transitions.
[2019-12-07 12:42:50,978 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. 
[2019-12-07 12:42:50,979 INFO  L78                 Accepts]: Start accepts. Automaton has 2 states. Word has length 7
[2019-12-07 12:42:50,979 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-12-07 12:42:50,984 INFO  L225             Difference]: With dead ends: 25
[2019-12-07 12:42:50,985 INFO  L226             Difference]: Without dead ends: 10
[2019-12-07 12:42:50,986 INFO  L630         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
[2019-12-07 12:42:50,997 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 10 states.
[2019-12-07 12:42:51,005 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10.
[2019-12-07 12:42:51,006 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 10 states.
[2019-12-07 12:42:51,006 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 12 transitions.
[2019-12-07 12:42:51,007 INFO  L78                 Accepts]: Start accepts. Automaton has 10 states and 12 transitions. Word has length 7
[2019-12-07 12:42:51,007 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-12-07 12:42:51,007 INFO  L462      AbstractCegarLoop]: Abstraction has 10 states and 12 transitions.
[2019-12-07 12:42:51,008 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 2 states.
[2019-12-07 12:42:51,008 INFO  L276                IsEmpty]: Start isEmpty. Operand 10 states and 12 transitions.
[2019-12-07 12:42:51,008 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 9
[2019-12-07 12:42:51,008 INFO  L402         BasicCegarLoop]: Found error trace
[2019-12-07 12:42:51,008 INFO  L410         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1]
[2019-12-07 12:42:51,008 INFO  L410      AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-12-07 12:42:51,008 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-12-07 12:42:51,009 INFO  L82        PathProgramCache]: Analyzing trace with hash 1827574600, now seen corresponding path program 1 times
[2019-12-07 12:42:51,009 INFO  L163   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2019-12-07 12:42:51,009 INFO  L348   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092356677]
[2019-12-07 12:42:51,009 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-12-07 12:42:51,023 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-12-07 12:42:51,052 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-12-07 12:42:51,052 INFO  L348   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092356677]
[2019-12-07 12:42:51,052 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-12-07 12:42:51,052 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2019-12-07 12:42:51,052 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733439378]
[2019-12-07 12:42:51,053 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 4 states
[2019-12-07 12:42:51,054 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2019-12-07 12:42:51,054 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2019-12-07 12:42:51,054 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2019-12-07 12:42:51,054 INFO  L87              Difference]: Start difference. First operand 10 states and 12 transitions. Second operand 4 states.
[2019-12-07 12:42:51,079 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-12-07 12:42:51,079 INFO  L93              Difference]: Finished difference Result 16 states and 19 transitions.
[2019-12-07 12:42:51,080 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2019-12-07 12:42:51,080 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 8
[2019-12-07 12:42:51,080 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-12-07 12:42:51,080 INFO  L225             Difference]: With dead ends: 16
[2019-12-07 12:42:51,080 INFO  L226             Difference]: Without dead ends: 12
[2019-12-07 12:42:51,081 INFO  L630         BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2019-12-07 12:42:51,081 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 12 states.
[2019-12-07 12:42:51,082 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 11.
[2019-12-07 12:42:51,083 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 11 states.
[2019-12-07 12:42:51,083 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions.
[2019-12-07 12:42:51,083 INFO  L78                 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 8
[2019-12-07 12:42:51,083 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-12-07 12:42:51,083 INFO  L462      AbstractCegarLoop]: Abstraction has 11 states and 13 transitions.
[2019-12-07 12:42:51,083 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2019-12-07 12:42:51,083 INFO  L276                IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions.
[2019-12-07 12:42:51,084 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 11
[2019-12-07 12:42:51,084 INFO  L402         BasicCegarLoop]: Found error trace
[2019-12-07 12:42:51,084 INFO  L410         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-12-07 12:42:51,084 INFO  L410      AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-12-07 12:42:51,084 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-12-07 12:42:51,084 INFO  L82        PathProgramCache]: Analyzing trace with hash -2096240094, now seen corresponding path program 1 times
[2019-12-07 12:42:51,084 INFO  L163   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2019-12-07 12:42:51,084 INFO  L348   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018884901]
[2019-12-07 12:42:51,085 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-12-07 12:42:51,097 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-12-07 12:42:51,127 INFO  L134       CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-12-07 12:42:51,127 INFO  L348   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018884901]
[2019-12-07 12:42:51,127 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-12-07 12:42:51,127 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2019-12-07 12:42:51,128 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000135612]
[2019-12-07 12:42:51,128 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 5 states
[2019-12-07 12:42:51,128 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2019-12-07 12:42:51,128 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2019-12-07 12:42:51,128 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2019-12-07 12:42:51,128 INFO  L87              Difference]: Start difference. First operand 11 states and 13 transitions. Second operand 5 states.
[2019-12-07 12:42:51,154 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-12-07 12:42:51,154 INFO  L93              Difference]: Finished difference Result 16 states and 18 transitions.
[2019-12-07 12:42:51,155 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2019-12-07 12:42:51,155 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 10
[2019-12-07 12:42:51,155 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-12-07 12:42:51,155 INFO  L225             Difference]: With dead ends: 16
[2019-12-07 12:42:51,155 INFO  L226             Difference]: Without dead ends: 13
[2019-12-07 12:42:51,156 INFO  L630         BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42
[2019-12-07 12:42:51,156 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 13 states.
[2019-12-07 12:42:51,159 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 12.
[2019-12-07 12:42:51,159 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 12 states.
[2019-12-07 12:42:51,159 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions.
[2019-12-07 12:42:51,159 INFO  L78                 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 10
[2019-12-07 12:42:51,160 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-12-07 12:42:51,160 INFO  L462      AbstractCegarLoop]: Abstraction has 12 states and 14 transitions.
[2019-12-07 12:42:51,160 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2019-12-07 12:42:51,160 INFO  L276                IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions.
[2019-12-07 12:42:51,160 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 12
[2019-12-07 12:42:51,160 INFO  L402         BasicCegarLoop]: Found error trace
[2019-12-07 12:42:51,160 INFO  L410         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-12-07 12:42:51,161 INFO  L410      AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-12-07 12:42:51,161 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-12-07 12:42:51,161 INFO  L82        PathProgramCache]: Analyzing trace with hash -560211090, now seen corresponding path program 1 times
[2019-12-07 12:42:51,161 INFO  L163   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2019-12-07 12:42:51,161 INFO  L348   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211422849]
[2019-12-07 12:42:51,161 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-12-07 12:42:51,175 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-12-07 12:42:51,202 INFO  L134       CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2019-12-07 12:42:51,202 INFO  L348   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211422849]
[2019-12-07 12:42:51,202 INFO  L348   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415622216]
[2019-12-07 12:42:51,202 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d975736a-a8b5-408e-a8a9-c1bcb9b25f06/bin/utaipan/z3
Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2019-12-07 12:42:51,240 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-12-07 12:42:51,241 INFO  L264         TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 5 conjunts are in the unsatisfiable core
[2019-12-07 12:42:51,245 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2019-12-07 12:42:51,261 INFO  L134       CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2019-12-07 12:42:51,262 INFO  L329         TraceCheckSpWp]: Computing backward predicates...
[2019-12-07 12:42:51,278 INFO  L134       CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2019-12-07 12:42:51,278 INFO  L348   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [77327046]
[2019-12-07 12:42:51,294 INFO  L159        IcfgInterpreter]: Started Sifa with 10 locations of interest
[2019-12-07 12:42:51,294 INFO  L166        IcfgInterpreter]: Building call graph
[2019-12-07 12:42:51,298 INFO  L171        IcfgInterpreter]: Initial procedures are [ULTIMATE.start]
[2019-12-07 12:42:51,302 INFO  L176        IcfgInterpreter]: Starting interpretation
[2019-12-07 12:42:51,303 INFO  L197        IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs
[2019-12-07 12:42:51,403 WARN  L227             Elim1Store]: Array PQE input equivalent to false
[2019-12-07 12:42:51,554 WARN  L227             Elim1Store]: Array PQE input equivalent to false
[2019-12-07 12:42:51,637 WARN  L227             Elim1Store]: Array PQE input equivalent to false
[2019-12-07 12:42:51,893 WARN  L227             Elim1Store]: Array PQE input equivalent to false
[2019-12-07 12:42:51,942 WARN  L227             Elim1Store]: Array PQE input equivalent to false
[2019-12-07 12:42:52,018 INFO  L180        IcfgInterpreter]: Interpretation finished
[2019-12-07 12:42:52,130 WARN  L192               SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 47
[2019-12-07 12:42:52,362 WARN  L192               SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 44
[2019-12-07 12:42:52,590 INFO  L343   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown
[2019-12-07 12:42:52,590 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences.
[2019-12-07 12:42:52,590 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7
[2019-12-07 12:42:52,590 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784399386]
[2019-12-07 12:42:52,591 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 8 states
[2019-12-07 12:42:52,591 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2019-12-07 12:42:52,591 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2019-12-07 12:42:52,592 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210
[2019-12-07 12:42:52,592 INFO  L87              Difference]: Start difference. First operand 12 states and 14 transitions. Second operand 8 states.
[2019-12-07 12:42:52,631 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-12-07 12:42:52,631 INFO  L93              Difference]: Finished difference Result 21 states and 25 transitions.
[2019-12-07 12:42:52,631 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2019-12-07 12:42:52,631 INFO  L78                 Accepts]: Start accepts. Automaton has 8 states. Word has length 11
[2019-12-07 12:42:52,632 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-12-07 12:42:52,632 INFO  L225             Difference]: With dead ends: 21
[2019-12-07 12:42:52,632 INFO  L226             Difference]: Without dead ends: 16
[2019-12-07 12:42:52,633 INFO  L630         BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272
[2019-12-07 12:42:52,633 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 16 states.
[2019-12-07 12:42:52,635 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16.
[2019-12-07 12:42:52,635 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 16 states.
[2019-12-07 12:42:52,636 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions.
[2019-12-07 12:42:52,636 INFO  L78                 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 11
[2019-12-07 12:42:52,636 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-12-07 12:42:52,636 INFO  L462      AbstractCegarLoop]: Abstraction has 16 states and 18 transitions.
[2019-12-07 12:42:52,636 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 8 states.
[2019-12-07 12:42:52,636 INFO  L276                IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions.
[2019-12-07 12:42:52,637 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 16
[2019-12-07 12:42:52,637 INFO  L402         BasicCegarLoop]: Found error trace
[2019-12-07 12:42:52,637 INFO  L410         BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-12-07 12:42:52,838 WARN  L499      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2019-12-07 12:42:52,838 INFO  L410      AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-12-07 12:42:52,839 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-12-07 12:42:52,839 INFO  L82        PathProgramCache]: Analyzing trace with hash 1637793722, now seen corresponding path program 2 times
[2019-12-07 12:42:52,840 INFO  L163   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2019-12-07 12:42:52,840 INFO  L348   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708664174]
[2019-12-07 12:42:52,840 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-12-07 12:42:52,897 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-12-07 12:42:52,990 INFO  L134       CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2019-12-07 12:42:52,990 INFO  L348   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708664174]
[2019-12-07 12:42:52,990 INFO  L348   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724479136]
[2019-12-07 12:42:52,991 INFO  L92    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2
No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d975736a-a8b5-408e-a8a9-c1bcb9b25f06/bin/utaipan/z3
Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2019-12-07 12:42:53,032 INFO  L249   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s)
[2019-12-07 12:42:53,032 INFO  L250   tOrderPrioritization]: Conjunction of SSA is unsat
[2019-12-07 12:42:53,033 INFO  L264         TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 48 conjunts are in the unsatisfiable core
[2019-12-07 12:42:53,034 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2019-12-07 12:42:53,126 INFO  L134       CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-12-07 12:42:53,126 INFO  L329         TraceCheckSpWp]: Computing backward predicates...
[2019-12-07 12:42:53,139 INFO  L134       CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2019-12-07 12:42:53,139 INFO  L348   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [577594399]
[2019-12-07 12:42:53,140 INFO  L159        IcfgInterpreter]: Started Sifa with 10 locations of interest
[2019-12-07 12:42:53,140 INFO  L166        IcfgInterpreter]: Building call graph
[2019-12-07 12:42:53,140 INFO  L171        IcfgInterpreter]: Initial procedures are [ULTIMATE.start]
[2019-12-07 12:42:53,140 INFO  L176        IcfgInterpreter]: Starting interpretation
[2019-12-07 12:42:53,140 INFO  L197        IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs
[2019-12-07 12:42:53,175 WARN  L227             Elim1Store]: Array PQE input equivalent to false
[2019-12-07 12:42:53,258 WARN  L227             Elim1Store]: Array PQE input equivalent to false
[2019-12-07 12:42:53,338 WARN  L227             Elim1Store]: Array PQE input equivalent to false
[2019-12-07 12:42:53,524 WARN  L227             Elim1Store]: Array PQE input equivalent to false
[2019-12-07 12:42:53,557 WARN  L227             Elim1Store]: Array PQE input equivalent to false
[2019-12-07 12:42:53,618 INFO  L180        IcfgInterpreter]: Interpretation finished
[2019-12-07 12:42:53,957 WARN  L192               SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 44
[2019-12-07 12:42:54,205 INFO  L343   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown
[2019-12-07 12:42:54,205 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences.
[2019-12-07 12:42:54,205 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 7] total 16
[2019-12-07 12:42:54,205 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207374982]
[2019-12-07 12:42:54,205 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 16 states
[2019-12-07 12:42:54,206 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2019-12-07 12:42:54,206 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants.
[2019-12-07 12:42:54,206 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506
[2019-12-07 12:42:54,206 INFO  L87              Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 16 states.
[2019-12-07 12:42:54,417 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-12-07 12:42:54,417 INFO  L93              Difference]: Finished difference Result 37 states and 42 transitions.
[2019-12-07 12:42:54,418 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. 
[2019-12-07 12:42:54,418 INFO  L78                 Accepts]: Start accepts. Automaton has 16 states. Word has length 15
[2019-12-07 12:42:54,418 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-12-07 12:42:54,418 INFO  L225             Difference]: With dead ends: 37
[2019-12-07 12:42:54,419 INFO  L226             Difference]: Without dead ends: 34
[2019-12-07 12:42:54,419 INFO  L630         BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=191, Invalid=999, Unknown=0, NotChecked=0, Total=1190
[2019-12-07 12:42:54,420 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 34 states.
[2019-12-07 12:42:54,422 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 17.
[2019-12-07 12:42:54,423 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 17 states.
[2019-12-07 12:42:54,423 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions.
[2019-12-07 12:42:54,423 INFO  L78                 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 15
[2019-12-07 12:42:54,423 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-12-07 12:42:54,423 INFO  L462      AbstractCegarLoop]: Abstraction has 17 states and 19 transitions.
[2019-12-07 12:42:54,424 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 16 states.
[2019-12-07 12:42:54,424 INFO  L276                IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions.
[2019-12-07 12:42:54,424 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 17
[2019-12-07 12:42:54,424 INFO  L402         BasicCegarLoop]: Found error trace
[2019-12-07 12:42:54,424 INFO  L410         BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-12-07 12:42:54,625 WARN  L499      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2019-12-07 12:42:54,625 INFO  L410      AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-12-07 12:42:54,626 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-12-07 12:42:54,626 INFO  L82        PathProgramCache]: Analyzing trace with hash -769279786, now seen corresponding path program 3 times
[2019-12-07 12:42:54,626 INFO  L163   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2019-12-07 12:42:54,627 INFO  L348   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134089970]
[2019-12-07 12:42:54,627 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-12-07 12:42:54,648 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-12-07 12:42:54,699 INFO  L134       CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked.
[2019-12-07 12:42:54,700 INFO  L348   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134089970]
[2019-12-07 12:42:54,700 INFO  L348   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256974429]
[2019-12-07 12:42:54,700 INFO  L92    rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST
No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d975736a-a8b5-408e-a8a9-c1bcb9b25f06/bin/utaipan/z3
Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2019-12-07 12:42:54,733 INFO  L249   tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s)
[2019-12-07 12:42:54,733 INFO  L250   tOrderPrioritization]: Conjunction of SSA is unsat
[2019-12-07 12:42:54,734 INFO  L264         TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 13 conjunts are in the unsatisfiable core
[2019-12-07 12:42:54,734 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2019-12-07 12:42:54,763 INFO  L134       CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked.
[2019-12-07 12:42:54,764 INFO  L329         TraceCheckSpWp]: Computing backward predicates...
[2019-12-07 12:42:54,778 INFO  L134       CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked.
[2019-12-07 12:42:54,778 INFO  L348   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [297500988]
[2019-12-07 12:42:54,780 INFO  L159        IcfgInterpreter]: Started Sifa with 10 locations of interest
[2019-12-07 12:42:54,780 INFO  L166        IcfgInterpreter]: Building call graph
[2019-12-07 12:42:54,780 INFO  L171        IcfgInterpreter]: Initial procedures are [ULTIMATE.start]
[2019-12-07 12:42:54,780 INFO  L176        IcfgInterpreter]: Starting interpretation
[2019-12-07 12:42:54,780 INFO  L197        IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs
[2019-12-07 12:42:54,813 WARN  L227             Elim1Store]: Array PQE input equivalent to false
[2019-12-07 12:42:54,880 WARN  L227             Elim1Store]: Array PQE input equivalent to false
[2019-12-07 12:42:54,953 WARN  L227             Elim1Store]: Array PQE input equivalent to false
[2019-12-07 12:42:55,124 WARN  L227             Elim1Store]: Array PQE input equivalent to false
[2019-12-07 12:42:55,152 WARN  L227             Elim1Store]: Array PQE input equivalent to false
[2019-12-07 12:42:55,205 INFO  L180        IcfgInterpreter]: Interpretation finished
[2019-12-07 12:42:55,530 WARN  L192               SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 44
[2019-12-07 12:42:55,763 INFO  L343   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown
[2019-12-07 12:42:55,763 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences.
[2019-12-07 12:42:55,763 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10
[2019-12-07 12:42:55,764 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431549257]
[2019-12-07 12:42:55,764 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 11 states
[2019-12-07 12:42:55,764 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2019-12-07 12:42:55,764 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants.
[2019-12-07 12:42:55,764 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306
[2019-12-07 12:42:55,764 INFO  L87              Difference]: Start difference. First operand 17 states and 19 transitions. Second operand 11 states.
[2019-12-07 12:42:55,815 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-12-07 12:42:55,815 INFO  L93              Difference]: Finished difference Result 37 states and 41 transitions.
[2019-12-07 12:42:55,816 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2019-12-07 12:42:55,816 INFO  L78                 Accepts]: Start accepts. Automaton has 11 states. Word has length 16
[2019-12-07 12:42:55,816 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-12-07 12:42:55,816 INFO  L225             Difference]: With dead ends: 37
[2019-12-07 12:42:55,816 INFO  L226             Difference]: Without dead ends: 34
[2019-12-07 12:42:55,817 INFO  L630         BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342
[2019-12-07 12:42:55,817 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 34 states.
[2019-12-07 12:42:55,820 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 28.
[2019-12-07 12:42:55,820 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 28 states.
[2019-12-07 12:42:55,820 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions.
[2019-12-07 12:42:55,820 INFO  L78                 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 16
[2019-12-07 12:42:55,821 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-12-07 12:42:55,821 INFO  L462      AbstractCegarLoop]: Abstraction has 28 states and 32 transitions.
[2019-12-07 12:42:55,821 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 11 states.
[2019-12-07 12:42:55,821 INFO  L276                IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions.
[2019-12-07 12:42:55,821 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 18
[2019-12-07 12:42:55,821 INFO  L402         BasicCegarLoop]: Found error trace
[2019-12-07 12:42:55,821 INFO  L410         BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-12-07 12:42:56,022 WARN  L499      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2019-12-07 12:42:56,023 INFO  L410      AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-12-07 12:42:56,023 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-12-07 12:42:56,023 INFO  L82        PathProgramCache]: Analyzing trace with hash 1920852794, now seen corresponding path program 4 times
[2019-12-07 12:42:56,024 INFO  L163   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2019-12-07 12:42:56,024 INFO  L348   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955668242]
[2019-12-07 12:42:56,024 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-12-07 12:42:56,048 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is sat
[2019-12-07 12:42:56,063 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is sat
[2019-12-07 12:42:56,077 INFO  L174   FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace
[2019-12-07 12:42:56,077 INFO  L475         BasicCegarLoop]: Counterexample might be feasible
[2019-12-07 12:42:56,099 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.12 12:42:56 BoogieIcfgContainer
[2019-12-07 12:42:56,099 INFO  L132        PluginConnector]: ------------------------ END TraceAbstraction----------------------------
[2019-12-07 12:42:56,099 INFO  L113        PluginConnector]: ------------------------Witness Printer----------------------------
[2019-12-07 12:42:56,099 INFO  L271        PluginConnector]: Initializing Witness Printer...
[2019-12-07 12:42:56,099 INFO  L275        PluginConnector]: Witness Printer initialized
[2019-12-07 12:42:56,100 INFO  L185        PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 12:42:50" (3/4) ...
[2019-12-07 12:42:56,101 INFO  L131         WitnessPrinter]: Generating witness for reachability counterexample
[2019-12-07 12:42:56,135 INFO  L141         WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_d975736a-a8b5-408e-a8a9-c1bcb9b25f06/bin/utaipan/witness.graphml
[2019-12-07 12:42:56,135 INFO  L132        PluginConnector]: ------------------------ END Witness Printer----------------------------
[2019-12-07 12:42:56,136 INFO  L168              Benchmark]: Toolchain (without parser) took 5933.18 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 194.0 MB). Free memory was 932.7 MB in the beginning and 1.1 GB in the end (delta: -142.4 MB). Peak memory consumption was 51.6 MB. Max. memory is 11.5 GB.
[2019-12-07 12:42:56,136 INFO  L168              Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 1.0 GB. Free memory is still 955.5 MB. There was no memory consumed. Max. memory is 11.5 GB.
[2019-12-07 12:42:56,136 INFO  L168              Benchmark]: CACSL2BoogieTranslator took 318.84 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 90.7 MB). Free memory was 932.7 MB in the beginning and 1.1 GB in the end (delta: -135.1 MB). Peak memory consumption was 18.5 MB. Max. memory is 11.5 GB.
[2019-12-07 12:42:56,136 INFO  L168              Benchmark]: Boogie Procedure Inliner took 28.44 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB.
[2019-12-07 12:42:56,136 INFO  L168              Benchmark]: Boogie Preprocessor took 18.31 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB.
[2019-12-07 12:42:56,137 INFO  L168              Benchmark]: RCFGBuilder took 249.96 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 27.2 MB). Peak memory consumption was 27.2 MB. Max. memory is 11.5 GB.
[2019-12-07 12:42:56,137 INFO  L168              Benchmark]: TraceAbstraction took 5278.97 ms. Allocated memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: 103.3 MB). Free memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: -42.5 MB). Peak memory consumption was 60.8 MB. Max. memory is 11.5 GB.
[2019-12-07 12:42:56,137 INFO  L168              Benchmark]: Witness Printer took 35.52 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: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 11.5 GB.
[2019-12-07 12:42:56,138 INFO  L335   ainManager$Toolchain]: #######################  End [Toolchain 1] #######################
 --- Results ---
 * Results from de.uni_freiburg.informatik.ultimate.core:
  - StatisticsResult: Toolchain Benchmarks
    Benchmark results are:
 * CDTParser took 0.13 ms. Allocated memory is still 1.0 GB. Free memory is still 955.5 MB. There was no memory consumed. Max. memory is 11.5 GB.
 * CACSL2BoogieTranslator took 318.84 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 90.7 MB). Free memory was 932.7 MB in the beginning and 1.1 GB in the end (delta: -135.1 MB). Peak memory consumption was 18.5 MB. Max. memory is 11.5 GB.
 * Boogie Procedure Inliner took 28.44 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB.
 * Boogie Preprocessor took 18.31 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB.
 * RCFGBuilder took 249.96 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 27.2 MB). Peak memory consumption was 27.2 MB. Max. memory is 11.5 GB.
 * TraceAbstraction took 5278.97 ms. Allocated memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: 103.3 MB). Free memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: -42.5 MB). Peak memory consumption was 60.8 MB. Max. memory is 11.5 GB.
 * Witness Printer took 35.52 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: 2.6 MB). Peak memory consumption was 2.6 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;
[L593]              len < 32 && __VERIFIER_nondet_int()
[L593]              len < 32 && __VERIFIER_nondet_int()
[L593]  COND FALSE  !(len < 32 && __VERIFIER_nondet_int())
[L564]              SLL head = ((void *)0);
[L565]  COND TRUE   len > 0
[L566]              SLL new_head = (SLL) malloc(sizeof(struct node));
[L567]  COND FALSE  !(((void *)0) == new_head)
[L570]              new_head->next = head
[L571]              head = new_head
[L572]              len--
[L565]  COND TRUE   len > 0
[L566]              SLL new_head = (SLL) malloc(sizeof(struct node));
[L567]  COND FALSE  !(((void *)0) == new_head)
[L570]              new_head->next = head
[L571]              head = new_head
[L572]              len--
[L565]  COND TRUE   len > 0
[L566]              SLL new_head = (SLL) malloc(sizeof(struct node));
[L567]  COND FALSE  !(((void *)0) == new_head)
[L570]              new_head->next = head
[L571]              head = new_head
[L572]              len--
[L565]  COND FALSE  !(len > 0)
[L574]              return head;
[L596]              SLL s = sll_create(len + 1);
[L577]              int 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))
[L582]              return len;
[L597]  COND TRUE   len != sll_length(s)
[L602]              __VERIFIER_error()

  - StatisticsResult: Ultimate Automizer benchmark data
    CFG has 1 procedures, 14 locations, 1 error locations. Result: UNSAFE, OverallTime: 5.2s, OverallIterations: 7, TraceHistogramMax: 3, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 50 SDtfs, 115 SDslu, 100 SDs, 0 SdLazy, 204 SolverSat, 57 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 167 GetRequests, 91 SyntacticMatches, 3 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 2.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=28occurred in iteration=6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 6 MinimizatonAttempts, 25 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 126 NumberOfCodeBlocks, 126 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 139 ConstructedInterpolants, 0 QuantifiedInterpolants, 8085 SizeOfPredicates, 27 NumberOfNonLiveVariables, 338 ConjunctsInSsa, 66 ConjunctsInUnsatCore, 12 InterpolantComputations, 3 PerfectInterpolantSequences, 45/73 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available
RESULT: Ultimate proved your program to be incorrect!
Received shutdown request...