./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/id_b3_o2-2.c --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_9305dca5-abc3-438e-ad8f-8de547db7be6/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_9305dca5-abc3-438e-ad8f-8de547db7be6/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_9305dca5-abc3-438e-ad8f-8de547db7be6/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_9305dca5-abc3-438e-ad8f-8de547db7be6/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursive-simple/id_b3_o2-2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_9305dca5-abc3-438e-ad8f-8de547db7be6/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_9305dca5-abc3-438e-ad8f-8de547db7be6/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 3bf945356a28265a842df89cdbf40bfa9a223140
..........................................................................................................................................................................................................................................................................................................................................................................................
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 21:44:34,388 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2019-12-07 21:44:34,389 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2019-12-07 21:44:34,397 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2019-12-07 21:44:34,397 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2019-12-07 21:44:34,398 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2019-12-07 21:44:34,399 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2019-12-07 21:44:34,400 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2019-12-07 21:44:34,402 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2019-12-07 21:44:34,403 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
[2019-12-07 21:44:34,404 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
[2019-12-07 21:44:34,405 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2019-12-07 21:44:34,405 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2019-12-07 21:44:34,406 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2019-12-07 21:44:34,406 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2019-12-07 21:44:34,407 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2019-12-07 21:44:34,408 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2019-12-07 21:44:34,409 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2019-12-07 21:44:34,410 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2019-12-07 21:44:34,412 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2019-12-07 21:44:34,413 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2019-12-07 21:44:34,414 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2019-12-07 21:44:34,415 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2019-12-07 21:44:34,416 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2019-12-07 21:44:34,418 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2019-12-07 21:44:34,418 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2019-12-07 21:44:34,418 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2019-12-07 21:44:34,419 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2019-12-07 21:44:34,419 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2019-12-07 21:44:34,419 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2019-12-07 21:44:34,420 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2019-12-07 21:44:34,420 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2019-12-07 21:44:34,421 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2019-12-07 21:44:34,421 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2019-12-07 21:44:34,422 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2019-12-07 21:44:34,422 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
[2019-12-07 21:44:34,423 INFO  L184        SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2019-12-07 21:44:34,423 INFO  L184        SettingsManager]: ReqParser provides no preferences, ignoring...
[2019-12-07 21:44:34,423 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
[2019-12-07 21:44:34,424 INFO  L181        SettingsManager]: Resetting Witness Parser preferences to default values
[2019-12-07 21:44:34,425 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2019-12-07 21:44:34,425 INFO  L101        SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_9305dca5-abc3-438e-ad8f-8de547db7be6/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf
[2019-12-07 21:44:34,439 INFO  L113        SettingsManager]: Loading preferences was successful
[2019-12-07 21:44:34,439 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2019-12-07 21:44:34,439 INFO  L136        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2019-12-07 21:44:34,440 INFO  L138        SettingsManager]:  * User list type=DISABLED
[2019-12-07 21:44:34,440 INFO  L136        SettingsManager]: Preferences of Abstract Interpretation differ from their defaults:
[2019-12-07 21:44:34,440 INFO  L138        SettingsManager]:  * Explicit value domain=true
[2019-12-07 21:44:34,440 INFO  L138        SettingsManager]:  * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain
[2019-12-07 21:44:34,440 INFO  L138        SettingsManager]:  * Octagon Domain=false
[2019-12-07 21:44:34,441 INFO  L138        SettingsManager]:  * Abstract domain=CompoundDomain
[2019-12-07 21:44:34,441 INFO  L138        SettingsManager]:  * Check feasibility of abstract posts with an SMT solver=true
[2019-12-07 21:44:34,441 INFO  L138        SettingsManager]:  * Use the RCFG-of-the-future interface=true
[2019-12-07 21:44:34,441 INFO  L138        SettingsManager]:  * Interval Domain=false
[2019-12-07 21:44:34,441 INFO  L136        SettingsManager]: Preferences of Sifa differ from their defaults:
[2019-12-07 21:44:34,442 INFO  L138        SettingsManager]:  * Call Summarizer=TopInputCallSummarizer
[2019-12-07 21:44:34,442 INFO  L138        SettingsManager]:  * Simplification Technique=SIMPLIFY_QUICK
[2019-12-07 21:44:34,442 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2019-12-07 21:44:34,443 INFO  L138        SettingsManager]:  * sizeof long=4
[2019-12-07 21:44:34,443 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2019-12-07 21:44:34,443 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2019-12-07 21:44:34,443 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2019-12-07 21:44:34,443 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2019-12-07 21:44:34,443 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2019-12-07 21:44:34,444 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2019-12-07 21:44:34,444 INFO  L138        SettingsManager]:  * Adapt memory model on pointer casts if necessary=true
[2019-12-07 21:44:34,444 INFO  L138        SettingsManager]:  * sizeof long double=12
[2019-12-07 21:44:34,444 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2019-12-07 21:44:34,444 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2019-12-07 21:44:34,444 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2019-12-07 21:44:34,445 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2019-12-07 21:44:34,445 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2019-12-07 21:44:34,445 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2019-12-07 21:44:34,445 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2019-12-07 21:44:34,445 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2019-12-07 21:44:34,445 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2019-12-07 21:44:34,446 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2019-12-07 21:44:34,446 INFO  L138        SettingsManager]:  * Trace refinement strategy=SIFA_TAIPAN
[2019-12-07 21:44:34,446 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2019-12-07 21:44:34,446 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2019-12-07 21:44:34,446 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2019-12-07 21:44:34,446 INFO  L138        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2019-12-07 21:44:34,446 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_9305dca5-abc3-438e-ad8f-8de547db7be6/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 -> 3bf945356a28265a842df89cdbf40bfa9a223140
[2019-12-07 21:44:34,554 INFO  L81    nceAwareModelManager]: Repository-Root is: /tmp
[2019-12-07 21:44:34,564 INFO  L258   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2019-12-07 21:44:34,567 INFO  L214   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2019-12-07 21:44:34,568 INFO  L271        PluginConnector]: Initializing CDTParser...
[2019-12-07 21:44:34,569 INFO  L275        PluginConnector]: CDTParser initialized
[2019-12-07 21:44:34,569 INFO  L428   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_9305dca5-abc3-438e-ad8f-8de547db7be6/bin/utaipan/../../sv-benchmarks/c/recursive-simple/id_b3_o2-2.c
[2019-12-07 21:44:34,608 INFO  L220              CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_9305dca5-abc3-438e-ad8f-8de547db7be6/bin/utaipan/data/1b9f3f485/17cfc34c9a0c47e7816b7b99268a6dfa/FLAGf16ff861b
[2019-12-07 21:44:35,013 INFO  L306              CDTParser]: Found 1 translation units.
[2019-12-07 21:44:35,013 INFO  L160              CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_9305dca5-abc3-438e-ad8f-8de547db7be6/sv-benchmarks/c/recursive-simple/id_b3_o2-2.c
[2019-12-07 21:44:35,017 INFO  L349              CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_9305dca5-abc3-438e-ad8f-8de547db7be6/bin/utaipan/data/1b9f3f485/17cfc34c9a0c47e7816b7b99268a6dfa/FLAGf16ff861b
[2019-12-07 21:44:35,026 INFO  L357              CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_9305dca5-abc3-438e-ad8f-8de547db7be6/bin/utaipan/data/1b9f3f485/17cfc34c9a0c47e7816b7b99268a6dfa
[2019-12-07 21:44:35,028 INFO  L296   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2019-12-07 21:44:35,029 INFO  L131        ToolchainWalker]: Walking toolchain with 6 elements.
[2019-12-07 21:44:35,029 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2019-12-07 21:44:35,029 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2019-12-07 21:44:35,032 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2019-12-07 21:44:35,032 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 09:44:35" (1/1) ...
[2019-12-07 21:44:35,034 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@36ad8c70 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 09:44:35, skipping insertion in model container
[2019-12-07 21:44:35,034 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 09:44:35" (1/1) ...
[2019-12-07 21:44:35,039 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2019-12-07 21:44:35,049 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2019-12-07 21:44:35,144 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2019-12-07 21:44:35,146 INFO  L203         MainTranslator]: Completed pre-run
[2019-12-07 21:44:35,188 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2019-12-07 21:44:35,200 INFO  L208         MainTranslator]: Completed translation
[2019-12-07 21:44:35,201 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 09:44:35 WrapperNode
[2019-12-07 21:44:35,201 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2019-12-07 21:44:35,202 INFO  L113        PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2019-12-07 21:44:35,202 INFO  L271        PluginConnector]: Initializing Boogie Procedure Inliner...
[2019-12-07 21:44:35,202 INFO  L275        PluginConnector]: Boogie Procedure Inliner initialized
[2019-12-07 21:44:35,209 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 09:44:35" (1/1) ...
[2019-12-07 21:44:35,212 INFO  L185        PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 09:44:35" (1/1) ...
[2019-12-07 21:44:35,224 INFO  L132        PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2019-12-07 21:44:35,224 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2019-12-07 21:44:35,224 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2019-12-07 21:44:35,224 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2019-12-07 21:44:35,230 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 09:44:35" (1/1) ...
[2019-12-07 21:44:35,230 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 09:44:35" (1/1) ...
[2019-12-07 21:44:35,230 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 09:44:35" (1/1) ...
[2019-12-07 21:44:35,231 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 09:44:35" (1/1) ...
[2019-12-07 21:44:35,232 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 09:44:35" (1/1) ...
[2019-12-07 21:44:35,233 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 09:44:35" (1/1) ...
[2019-12-07 21:44:35,234 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 09:44:35" (1/1) ...
[2019-12-07 21:44:35,234 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2019-12-07 21:44:35,235 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2019-12-07 21:44:35,235 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2019-12-07 21:44:35,235 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2019-12-07 21:44:35,235 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 09:44:35" (1/1) ...
No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9305dca5-abc3-438e-ad8f-8de547db7be6/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 21:44:35,274 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2019-12-07 21:44:35,274 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2019-12-07 21:44:35,274 INFO  L130     BoogieDeclarations]: Found specification of procedure id
[2019-12-07 21:44:35,274 INFO  L138     BoogieDeclarations]: Found implementation of procedure id
[2019-12-07 21:44:35,380 INFO  L282             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2019-12-07 21:44:35,381 INFO  L287             CfgBuilder]: Removed 4 assume(true) statements.
[2019-12-07 21:44:35,381 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 09:44:35 BoogieIcfgContainer
[2019-12-07 21:44:35,382 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2019-12-07 21:44:35,382 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2019-12-07 21:44:35,382 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2019-12-07 21:44:35,384 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2019-12-07 21:44:35,384 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 09:44:35" (1/3) ...
[2019-12-07 21:44:35,385 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36644697 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 09:44:35, skipping insertion in model container
[2019-12-07 21:44:35,385 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 09:44:35" (2/3) ...
[2019-12-07 21:44:35,385 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36644697 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 09:44:35, skipping insertion in model container
[2019-12-07 21:44:35,385 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 09:44:35" (3/3) ...
[2019-12-07 21:44:35,386 INFO  L109   eAbstractionObserver]: Analyzing ICFG id_b3_o2-2.c
[2019-12-07 21:44:35,393 INFO  L156   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2019-12-07 21:44:35,397 INFO  L168   ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2019-12-07 21:44:35,404 INFO  L249      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2019-12-07 21:44:35,418 INFO  L373      AbstractCegarLoop]: Interprodecural is true
[2019-12-07 21:44:35,419 INFO  L374      AbstractCegarLoop]: Hoare is true
[2019-12-07 21:44:35,419 INFO  L375      AbstractCegarLoop]: Compute interpolants for FPandBP
[2019-12-07 21:44:35,419 INFO  L376      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2019-12-07 21:44:35,419 INFO  L377      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2019-12-07 21:44:35,419 INFO  L378      AbstractCegarLoop]: Difference is false
[2019-12-07 21:44:35,419 INFO  L379      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2019-12-07 21:44:35,419 INFO  L383      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2019-12-07 21:44:35,429 INFO  L276                IsEmpty]: Start isEmpty. Operand 14 states.
[2019-12-07 21:44:35,433 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 10
[2019-12-07 21:44:35,433 INFO  L402         BasicCegarLoop]: Found error trace
[2019-12-07 21:44:35,433 INFO  L410         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-12-07 21:44:35,434 INFO  L410      AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-12-07 21:44:35,437 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-12-07 21:44:35,437 INFO  L82        PathProgramCache]: Analyzing trace with hash -1224902363, now seen corresponding path program 1 times
[2019-12-07 21:44:35,443 INFO  L163   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2019-12-07 21:44:35,443 INFO  L348   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302619075]
[2019-12-07 21:44:35,443 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-12-07 21:44:35,502 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-12-07 21:44:35,550 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 21:44:35,550 INFO  L348   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302619075]
[2019-12-07 21:44:35,551 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-12-07 21:44:35,551 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2019-12-07 21:44:35,552 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726361766]
[2019-12-07 21:44:35,555 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 5 states
[2019-12-07 21:44:35,555 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2019-12-07 21:44:35,564 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2019-12-07 21:44:35,564 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2019-12-07 21:44:35,565 INFO  L87              Difference]: Start difference. First operand 14 states. Second operand 5 states.
[2019-12-07 21:44:35,595 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-12-07 21:44:35,595 INFO  L93              Difference]: Finished difference Result 24 states and 26 transitions.
[2019-12-07 21:44:35,595 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2019-12-07 21:44:35,596 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 9
[2019-12-07 21:44:35,597 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-12-07 21:44:35,602 INFO  L225             Difference]: With dead ends: 24
[2019-12-07 21:44:35,603 INFO  L226             Difference]: Without dead ends: 14
[2019-12-07 21:44:35,605 INFO  L630         BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2019-12-07 21:44:35,616 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 14 states.
[2019-12-07 21:44:35,629 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14.
[2019-12-07 21:44:35,629 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 14 states.
[2019-12-07 21:44:35,630 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions.
[2019-12-07 21:44:35,631 INFO  L78                 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 9
[2019-12-07 21:44:35,631 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-12-07 21:44:35,631 INFO  L462      AbstractCegarLoop]: Abstraction has 14 states and 15 transitions.
[2019-12-07 21:44:35,631 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2019-12-07 21:44:35,631 INFO  L276                IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions.
[2019-12-07 21:44:35,632 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 16
[2019-12-07 21:44:35,632 INFO  L402         BasicCegarLoop]: Found error trace
[2019-12-07 21:44:35,632 INFO  L410         BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-12-07 21:44:35,632 INFO  L410      AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-12-07 21:44:35,632 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-12-07 21:44:35,633 INFO  L82        PathProgramCache]: Analyzing trace with hash 777549959, now seen corresponding path program 1 times
[2019-12-07 21:44:35,633 INFO  L163   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2019-12-07 21:44:35,633 INFO  L348   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871658451]
[2019-12-07 21:44:35,633 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-12-07 21:44:35,646 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-12-07 21:44:35,721 INFO  L134       CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2019-12-07 21:44:35,722 INFO  L348   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871658451]
[2019-12-07 21:44:35,722 INFO  L348   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871778235]
[2019-12-07 21:44:35,722 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9305dca5-abc3-438e-ad8f-8de547db7be6/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 21:44:35,745 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-12-07 21:44:35,746 INFO  L264         TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 7 conjunts are in the unsatisfiable core
[2019-12-07 21:44:35,750 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2019-12-07 21:44:35,777 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2019-12-07 21:44:35,812 INFO  L134       CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked.
[2019-12-07 21:44:35,812 INFO  L329         TraceCheckSpWp]: Computing backward predicates...
[2019-12-07 21:44:35,913 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2019-12-07 21:44:35,938 INFO  L134       CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked.
[2019-12-07 21:44:35,938 INFO  L348   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [876863947]
[2019-12-07 21:44:35,955 INFO  L159        IcfgInterpreter]: Started Sifa with 12 locations of interest
[2019-12-07 21:44:35,955 INFO  L166        IcfgInterpreter]: Building call graph
[2019-12-07 21:44:35,961 FATAL L?                        ?]: Ignoring exception!
java.lang.IllegalArgumentException: Recursive programs are not supported.
	at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132)
	at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.<init>(CallGraph.java:97)
	at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.<init>(IcfgInterpreter.java:92)
	at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.<init>(SifaRunner.java:98)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:297)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:190)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:180)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.<init>(AutomatonFreeRefinementEngine.java:85)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.<init>(TraceAbstractionRefinementEngine.java:75)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:463)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:419)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:368)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:139)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:332)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.<init>(TraceAbstractionStarter.java:126)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:120)
	at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168)
	at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151)
	at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128)
	at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232)
	at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226)
	at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142)
	at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104)
	at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:316)
	at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145)
	at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55)
[2019-12-07 21:44:35,962 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences.
[2019-12-07 21:44:35,962 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 12
[2019-12-07 21:44:35,963 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114741441]
[2019-12-07 21:44:35,964 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 12 states
[2019-12-07 21:44:35,964 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2019-12-07 21:44:35,964 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants.
[2019-12-07 21:44:35,965 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132
[2019-12-07 21:44:35,965 INFO  L87              Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 12 states.
[2019-12-07 21:44:36,040 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-12-07 21:44:36,040 INFO  L93              Difference]: Finished difference Result 21 states and 22 transitions.
[2019-12-07 21:44:36,040 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. 
[2019-12-07 21:44:36,040 INFO  L78                 Accepts]: Start accepts. Automaton has 12 states. Word has length 15
[2019-12-07 21:44:36,041 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-12-07 21:44:36,041 INFO  L225             Difference]: With dead ends: 21
[2019-12-07 21:44:36,041 INFO  L226             Difference]: Without dead ends: 17
[2019-12-07 21:44:36,043 INFO  L630         BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 5 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210
[2019-12-07 21:44:36,043 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 17 states.
[2019-12-07 21:44:36,046 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17.
[2019-12-07 21:44:36,046 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 17 states.
[2019-12-07 21:44:36,047 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions.
[2019-12-07 21:44:36,047 INFO  L78                 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 15
[2019-12-07 21:44:36,048 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-12-07 21:44:36,048 INFO  L462      AbstractCegarLoop]: Abstraction has 17 states and 18 transitions.
[2019-12-07 21:44:36,048 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 12 states.
[2019-12-07 21:44:36,048 INFO  L276                IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions.
[2019-12-07 21:44:36,049 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 22
[2019-12-07 21:44:36,049 INFO  L402         BasicCegarLoop]: Found error trace
[2019-12-07 21:44:36,049 INFO  L410         BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1]
[2019-12-07 21:44:36,249 WARN  L499      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2019-12-07 21:44:36,250 INFO  L410      AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-12-07 21:44:36,250 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-12-07 21:44:36,250 INFO  L82        PathProgramCache]: Analyzing trace with hash -1683357787, now seen corresponding path program 2 times
[2019-12-07 21:44:36,250 INFO  L163   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2019-12-07 21:44:36,250 INFO  L348   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139141762]
[2019-12-07 21:44:36,250 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-12-07 21:44:36,281 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is sat
[2019-12-07 21:44:36,296 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is sat
[2019-12-07 21:44:36,307 INFO  L174   FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace
[2019-12-07 21:44:36,308 INFO  L475         BasicCegarLoop]: Counterexample might be feasible
[2019-12-07 21:44:36,324 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.12 09:44:36 BoogieIcfgContainer
[2019-12-07 21:44:36,324 INFO  L132        PluginConnector]: ------------------------ END TraceAbstraction----------------------------
[2019-12-07 21:44:36,324 INFO  L113        PluginConnector]: ------------------------Witness Printer----------------------------
[2019-12-07 21:44:36,324 INFO  L271        PluginConnector]: Initializing Witness Printer...
[2019-12-07 21:44:36,325 INFO  L275        PluginConnector]: Witness Printer initialized
[2019-12-07 21:44:36,325 INFO  L185        PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 09:44:35" (3/4) ...
[2019-12-07 21:44:36,326 INFO  L131         WitnessPrinter]: Generating witness for reachability counterexample
[2019-12-07 21:44:36,355 INFO  L141         WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_9305dca5-abc3-438e-ad8f-8de547db7be6/bin/utaipan/witness.graphml
[2019-12-07 21:44:36,355 INFO  L132        PluginConnector]: ------------------------ END Witness Printer----------------------------
[2019-12-07 21:44:36,357 INFO  L168              Benchmark]: Toolchain (without parser) took 1327.92 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 84.4 MB). Free memory was 939.3 MB in the beginning and 964.8 MB in the end (delta: -25.5 MB). Peak memory consumption was 58.9 MB. Max. memory is 11.5 GB.
[2019-12-07 21:44:36,357 INFO  L168              Benchmark]: CDTParser took 0.17 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 21:44:36,357 INFO  L168              Benchmark]: CACSL2BoogieTranslator took 172.07 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 84.4 MB). Free memory was 939.3 MB in the beginning and 1.1 GB in the end (delta: -139.8 MB). Peak memory consumption was 23.3 MB. Max. memory is 11.5 GB.
[2019-12-07 21:44:36,358 INFO  L168              Benchmark]: Boogie Procedure Inliner took 22.11 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 21:44:36,358 INFO  L168              Benchmark]: Boogie Preprocessor took 10.51 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 21:44:36,358 INFO  L168              Benchmark]: RCFGBuilder took 147.00 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: 16.5 MB). Peak memory consumption was 16.5 MB. Max. memory is 11.5 GB.
[2019-12-07 21:44:36,359 INFO  L168              Benchmark]: TraceAbstraction took 941.97 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 964.8 MB in the end (delta: 97.9 MB). Peak memory consumption was 97.9 MB. Max. memory is 11.5 GB.
[2019-12-07 21:44:36,359 INFO  L168              Benchmark]: Witness Printer took 31.01 ms. Allocated memory is still 1.1 GB. Free memory is still 964.8 MB. There was no memory consumed. Max. memory is 11.5 GB.
[2019-12-07 21:44:36,361 INFO  L335   ainManager$Toolchain]: #######################  End [Toolchain 1] #######################
 --- Results ---
 * Results from de.uni_freiburg.informatik.ultimate.core:
  - StatisticsResult: Toolchain Benchmarks
    Benchmark results are:
 * CDTParser took 0.17 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 172.07 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 84.4 MB). Free memory was 939.3 MB in the beginning and 1.1 GB in the end (delta: -139.8 MB). Peak memory consumption was 23.3 MB. Max. memory is 11.5 GB.
 * Boogie Procedure Inliner took 22.11 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 10.51 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.
 * RCFGBuilder took 147.00 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: 16.5 MB). Peak memory consumption was 16.5 MB. Max. memory is 11.5 GB.
 * TraceAbstraction took 941.97 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 964.8 MB in the end (delta: 97.9 MB). Peak memory consumption was 97.9 MB. Max. memory is 11.5 GB.
 * Witness Printer took 31.01 ms. Allocated memory is still 1.1 GB. Free memory is still 964.8 MB. There was no memory consumed. Max. memory is 11.5 GB.
 * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction:
  - CounterExampleResult [Line: 15]: a call of __VERIFIER_error() is reachable
    a call of __VERIFIER_error() is reachable
We found a FailurePath: 
[L12]              int input = __VERIFIER_nondet_int();
[L13]  CALL, EXPR  id(input)
       VAL         [\old(x)=2]
[L5]   COND FALSE  !(x==0)
       VAL         [\old(x)=2, x=2]
[L6]   CALL, EXPR  id((unsigned int)x-1)
       VAL         [\old(x)=1]
[L5]   COND FALSE  !(x==0)
       VAL         [\old(x)=1, x=1]
[L6]   CALL, EXPR  id((unsigned int)x-1)
       VAL         [\old(x)=0]
[L5]   COND TRUE   x==0
[L5]               return 0;
       VAL         [\old(x)=0, \result=0, x=0]
[L6]   RET, EXPR   id((unsigned int)x-1)
       VAL         [\old(x)=1, id((unsigned int)x-1)=0, x=1]
[L6]               int ret = id((unsigned int)x-1) + 1;
[L7]   COND FALSE  !(ret > 3)
[L8]               return ret;
       VAL         [\old(x)=1, \result=1, ret=1, x=1]
[L6]   RET, EXPR   id((unsigned int)x-1)
       VAL         [\old(x)=2, id((unsigned int)x-1)=1, x=2]
[L6]               int ret = id((unsigned int)x-1) + 1;
[L7]   COND FALSE  !(ret > 3)
[L8]               return ret;
       VAL         [\old(x)=2, \result=2, ret=2, x=2]
[L13]  RET, EXPR   id(input)
[L13]              int result = id(input);
[L14]  COND TRUE   result == 2
[L15]              __VERIFIER_error()

  - StatisticsResult: Ultimate Automizer benchmark data
    CFG has 2 procedures, 14 locations, 1 error locations. Result: UNSAFE, OverallTime: 0.8s, OverallIterations: 3, TraceHistogramMax: 3, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 20 SDtfs, 8 SDslu, 72 SDs, 0 SdLazy, 78 SolverSat, 3 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 45 GetRequests, 24 SyntacticMatches, 5 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=17occurred in iteration=2, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 60 NumberOfCodeBlocks, 60 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 50 ConstructedInterpolants, 0 QuantifiedInterpolants, 1668 SizeOfPredicates, 2 NumberOfNonLiveVariables, 41 ConjunctsInSsa, 7 ConjunctsInUnsatCore, 4 InterpolantComputations, 1 PerfectInterpolantSequences, 6/12 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...