./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursive-simple/id_o3.c --full-output --architecture 32bit


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


Checking for ERROR reachability
Using default analysis
Version 5fbdf5bf
Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/recursive-simple/id_o3.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) )

 --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 02fc4bd1d36800792ed4ab31b3ee599492a65576
.............................................................................................................................................................................................................................................................................................................................................................................
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 0.2.1-wip.dd.seqcomp-5fbdf5b
[2021-08-29 16:33:10,147 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2021-08-29 16:33:10,150 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2021-08-29 16:33:10,191 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2021-08-29 16:33:10,192 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2021-08-29 16:33:10,196 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2021-08-29 16:33:10,197 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2021-08-29 16:33:10,203 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2021-08-29 16:33:10,205 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2021-08-29 16:33:10,211 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
[2021-08-29 16:33:10,212 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
[2021-08-29 16:33:10,216 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2021-08-29 16:33:10,216 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2021-08-29 16:33:10,219 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2021-08-29 16:33:10,220 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2021-08-29 16:33:10,223 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2021-08-29 16:33:10,224 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2021-08-29 16:33:10,225 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2021-08-29 16:33:10,227 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2021-08-29 16:33:10,231 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2021-08-29 16:33:10,232 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2021-08-29 16:33:10,234 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2021-08-29 16:33:10,236 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2021-08-29 16:33:10,236 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2021-08-29 16:33:10,240 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2021-08-29 16:33:10,240 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2021-08-29 16:33:10,240 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2021-08-29 16:33:10,242 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2021-08-29 16:33:10,242 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2021-08-29 16:33:10,243 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2021-08-29 16:33:10,243 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2021-08-29 16:33:10,244 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2021-08-29 16:33:10,245 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2021-08-29 16:33:10,246 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2021-08-29 16:33:10,247 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2021-08-29 16:33:10,247 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
[2021-08-29 16:33:10,248 INFO  L184        SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2021-08-29 16:33:10,248 INFO  L184        SettingsManager]: ReqParser provides no preferences, ignoring...
[2021-08-29 16:33:10,248 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
[2021-08-29 16:33:10,249 INFO  L181        SettingsManager]: Resetting Witness Parser preferences to default values
[2021-08-29 16:33:10,250 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2021-08-29 16:33:10,250 INFO  L101        SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf
[2021-08-29 16:33:10,282 INFO  L113        SettingsManager]: Loading preferences was successful
[2021-08-29 16:33:10,283 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2021-08-29 16:33:10,284 INFO  L136        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2021-08-29 16:33:10,284 INFO  L138        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2021-08-29 16:33:10,286 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2021-08-29 16:33:10,286 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2021-08-29 16:33:10,286 INFO  L138        SettingsManager]:  * Use SBE=true
[2021-08-29 16:33:10,286 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2021-08-29 16:33:10,286 INFO  L138        SettingsManager]:  * sizeof long=4
[2021-08-29 16:33:10,287 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2021-08-29 16:33:10,287 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2021-08-29 16:33:10,288 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2021-08-29 16:33:10,288 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2021-08-29 16:33:10,288 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2021-08-29 16:33:10,288 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2021-08-29 16:33:10,296 INFO  L138        SettingsManager]:  * sizeof long double=12
[2021-08-29 16:33:10,296 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2021-08-29 16:33:10,296 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2021-08-29 16:33:10,297 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2021-08-29 16:33:10,297 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2021-08-29 16:33:10,297 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2021-08-29 16:33:10,297 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2021-08-29 16:33:10,297 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2021-08-29 16:33:10,298 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2021-08-29 16:33:10,298 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2021-08-29 16:33:10,298 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2021-08-29 16:33:10,298 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2021-08-29 16:33:10,298 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2021-08-29 16:33:10,299 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2021-08-29 16:33:10,299 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2021-08-29 16:33:10,299 INFO  L138        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
WARNING: An illegal reflective access operation has occurred
WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int)
WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
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 -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux
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(reach_error())) )


Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 02fc4bd1d36800792ed4ab31b3ee599492a65576
[2021-08-29 16:33:10,625 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2021-08-29 16:33:10,648 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2021-08-29 16:33:10,651 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2021-08-29 16:33:10,652 INFO  L271        PluginConnector]: Initializing CDTParser...
[2021-08-29 16:33:10,653 INFO  L275        PluginConnector]: CDTParser initialized
[2021-08-29 16:33:10,654 INFO  L432   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive-simple/id_o3.c
[2021-08-29 16:33:10,711 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ca9e82014/d1395582dde648a5a2823b2990b92cb7/FLAG90e95cfc7
[2021-08-29 16:33:11,142 INFO  L306              CDTParser]: Found 1 translation units.
[2021-08-29 16:33:11,143 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/id_o3.c
[2021-08-29 16:33:11,148 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ca9e82014/d1395582dde648a5a2823b2990b92cb7/FLAG90e95cfc7
[2021-08-29 16:33:11,557 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ca9e82014/d1395582dde648a5a2823b2990b92cb7
[2021-08-29 16:33:11,559 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2021-08-29 16:33:11,560 INFO  L131        ToolchainWalker]: Walking toolchain with 6 elements.
[2021-08-29 16:33:11,562 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2021-08-29 16:33:11,562 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2021-08-29 16:33:11,565 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2021-08-29 16:33:11,565 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 04:33:11" (1/1) ...
[2021-08-29 16:33:11,566 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@49aeede7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 04:33:11, skipping insertion in model container
[2021-08-29 16:33:11,567 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 04:33:11" (1/1) ...
[2021-08-29 16:33:11,575 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2021-08-29 16:33:11,587 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2021-08-29 16:33:11,729 WARN  L228   ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/id_o3.c[514,527]
[2021-08-29 16:33:11,732 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2021-08-29 16:33:11,741 INFO  L203         MainTranslator]: Completed pre-run
[2021-08-29 16:33:11,754 WARN  L228   ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/id_o3.c[514,527]
[2021-08-29 16:33:11,754 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2021-08-29 16:33:11,766 INFO  L208         MainTranslator]: Completed translation
[2021-08-29 16:33:11,766 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 04:33:11 WrapperNode
[2021-08-29 16:33:11,768 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2021-08-29 16:33:11,769 INFO  L113        PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2021-08-29 16:33:11,769 INFO  L271        PluginConnector]: Initializing Boogie Procedure Inliner...
[2021-08-29 16:33:11,770 INFO  L275        PluginConnector]: Boogie Procedure Inliner initialized
[2021-08-29 16:33:11,796 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 04:33:11" (1/1) ...
[2021-08-29 16:33:11,821 INFO  L185        PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 04:33:11" (1/1) ...
[2021-08-29 16:33:11,835 INFO  L132        PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2021-08-29 16:33:11,836 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2021-08-29 16:33:11,836 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2021-08-29 16:33:11,836 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2021-08-29 16:33:11,842 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 04:33:11" (1/1) ...
[2021-08-29 16:33:11,843 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 04:33:11" (1/1) ...
[2021-08-29 16:33:11,844 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 04:33:11" (1/1) ...
[2021-08-29 16:33:11,845 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 04:33:11" (1/1) ...
[2021-08-29 16:33:11,849 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 04:33:11" (1/1) ...
[2021-08-29 16:33:11,850 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 04:33:11" (1/1) ...
[2021-08-29 16:33:11,854 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 04:33:11" (1/1) ...
[2021-08-29 16:33:11,856 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2021-08-29 16:33:11,857 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2021-08-29 16:33:11,858 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2021-08-29 16:33:11,858 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2021-08-29 16:33:11,859 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 04:33:11" (1/1) ...
[2021-08-29 16:33:11,864 INFO  L170          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2021-08-29 16:33:11,873 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2021-08-29 16:33:11,886 INFO  L229       MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null)
[2021-08-29 16:33:11,912 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process
[2021-08-29 16:33:11,927 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2021-08-29 16:33:11,927 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2021-08-29 16:33:11,928 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~int
[2021-08-29 16:33:11,928 INFO  L130     BoogieDeclarations]: Found specification of procedure id
[2021-08-29 16:33:11,929 INFO  L138     BoogieDeclarations]: Found implementation of procedure id
[2021-08-29 16:33:11,929 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack
[2021-08-29 16:33:12,075 INFO  L294             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2021-08-29 16:33:12,075 INFO  L299             CfgBuilder]: Removed 4 assume(true) statements.
[2021-08-29 16:33:12,078 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 04:33:12 BoogieIcfgContainer
[2021-08-29 16:33:12,078 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2021-08-29 16:33:12,079 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2021-08-29 16:33:12,079 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2021-08-29 16:33:12,082 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2021-08-29 16:33:12,082 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.08 04:33:11" (1/3) ...
[2021-08-29 16:33:12,083 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4dd01439 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 04:33:12, skipping insertion in model container
[2021-08-29 16:33:12,083 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 04:33:11" (2/3) ...
[2021-08-29 16:33:12,083 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4dd01439 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 04:33:12, skipping insertion in model container
[2021-08-29 16:33:12,084 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 04:33:12" (3/3) ...
[2021-08-29 16:33:12,085 INFO  L111   eAbstractionObserver]: Analyzing ICFG id_o3.c
[2021-08-29 16:33:12,090 INFO  L204   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2021-08-29 16:33:12,090 INFO  L163   ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2021-08-29 16:33:12,136 INFO  L338      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2021-08-29 16:33:12,144 INFO  L339      AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR
[2021-08-29 16:33:12,145 INFO  L340      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2021-08-29 16:33:12,160 INFO  L276                IsEmpty]: Start isEmpty. Operand  has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2)
[2021-08-29 16:33:12,165 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 11
[2021-08-29 16:33:12,166 INFO  L505         BasicCegarLoop]: Found error trace
[2021-08-29 16:33:12,166 INFO  L513         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2021-08-29 16:33:12,167 INFO  L402      AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2021-08-29 16:33:12,174 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2021-08-29 16:33:12,174 INFO  L82        PathProgramCache]: Analyzing trace with hash -358017204, now seen corresponding path program 1 times
[2021-08-29 16:33:12,183 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2021-08-29 16:33:12,184 INFO  L332   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272159889]
[2021-08-29 16:33:12,184 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-08-29 16:33:12,185 INFO  L128          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2021-08-29 16:33:12,285 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-08-29 16:33:12,432 INFO  L376   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2
[2021-08-29 16:33:12,437 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-08-29 16:33:12,487 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2021-08-29 16:33:12,488 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2021-08-29 16:33:12,488 INFO  L332   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272159889]
[2021-08-29 16:33:12,489 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272159889] provided 1 perfect and 0 imperfect interpolant sequences
[2021-08-29 16:33:12,489 INFO  L186   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2021-08-29 16:33:12,489 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2021-08-29 16:33:12,490 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473843077]
[2021-08-29 16:33:12,494 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2021-08-29 16:33:12,509 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2021-08-29 16:33:12,538 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2021-08-29 16:33:12,539 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2021-08-29 16:33:12,550 INFO  L87              Difference]: Start difference. First operand  has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand  has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)
[2021-08-29 16:33:12,648 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-08-29 16:33:12,648 INFO  L93              Difference]: Finished difference Result 28 states and 30 transitions.
[2021-08-29 16:33:12,649 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2021-08-29 16:33:12,650 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10
[2021-08-29 16:33:12,651 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2021-08-29 16:33:12,655 INFO  L225             Difference]: With dead ends: 28
[2021-08-29 16:33:12,655 INFO  L226             Difference]: Without dead ends: 15
[2021-08-29 16:33:12,657 INFO  L927         BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 41.13ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2021-08-29 16:33:12,660 INFO  L928         BasicCegarLoop]: 4 mSDtfsCounter, 3 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 51.61ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.51ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 78.85ms IncrementalHoareTripleChecker+Time
[2021-08-29 16:33:12,661 INFO  L929         BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 16 Invalid, 51 Unknown, 0 Unchecked, 1.51ms Time], IncrementalHoareTripleChecker [0 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 78.85ms Time]
[2021-08-29 16:33:12,675 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 15 states.
[2021-08-29 16:33:12,688 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15.
[2021-08-29 16:33:12,689 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 15 states, 10 states have (on average 1.1) internal successors, (11), 11 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3)
[2021-08-29 16:33:12,690 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions.
[2021-08-29 16:33:12,691 INFO  L78                 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10
[2021-08-29 16:33:12,691 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2021-08-29 16:33:12,691 INFO  L470      AbstractCegarLoop]: Abstraction has 15 states and 16 transitions.
[2021-08-29 16:33:12,691 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)
[2021-08-29 16:33:12,692 INFO  L276                IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions.
[2021-08-29 16:33:12,694 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 17
[2021-08-29 16:33:12,694 INFO  L505         BasicCegarLoop]: Found error trace
[2021-08-29 16:33:12,694 INFO  L513         BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2021-08-29 16:33:12,695 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2021-08-29 16:33:12,695 INFO  L402      AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2021-08-29 16:33:12,699 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2021-08-29 16:33:12,699 INFO  L82        PathProgramCache]: Analyzing trace with hash 679465686, now seen corresponding path program 1 times
[2021-08-29 16:33:12,699 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2021-08-29 16:33:12,699 INFO  L332   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952155880]
[2021-08-29 16:33:12,699 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-08-29 16:33:12,700 INFO  L128          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2021-08-29 16:33:12,734 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-08-29 16:33:12,821 INFO  L376   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2
[2021-08-29 16:33:12,833 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-08-29 16:33:12,867 INFO  L376   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2
[2021-08-29 16:33:12,870 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-08-29 16:33:12,889 INFO  L134       CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked.
[2021-08-29 16:33:12,889 INFO  L139   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2021-08-29 16:33:12,890 INFO  L332   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952155880]
[2021-08-29 16:33:12,890 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952155880] provided 0 perfect and 1 imperfect interpolant sequences
[2021-08-29 16:33:12,890 INFO  L332   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031394836]
[2021-08-29 16:33:12,890 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-08-29 16:33:12,890 INFO  L170          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2021-08-29 16:33:12,890 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2021-08-29 16:33:12,892 INFO  L229       MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2021-08-29 16:33:12,934 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process
[2021-08-29 16:33:12,969 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-08-29 16:33:12,972 INFO  L263         TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 12 conjunts are in the unsatisfiable core
[2021-08-29 16:33:12,995 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2021-08-29 16:33:13,188 INFO  L134       CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked.
[2021-08-29 16:33:13,189 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2021-08-29 16:33:13,333 INFO  L134       CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked.
[2021-08-29 16:33:13,334 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031394836] provided 0 perfect and 2 imperfect interpolant sequences
[2021-08-29 16:33:13,334 INFO  L186   FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences.
[2021-08-29 16:33:13,334 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13
[2021-08-29 16:33:13,335 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122047062]
[2021-08-29 16:33:13,336 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 13 states
[2021-08-29 16:33:13,336 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2021-08-29 16:33:13,336 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants.
[2021-08-29 16:33:13,337 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156
[2021-08-29 16:33:13,337 INFO  L87              Difference]: Start difference. First operand 15 states and 16 transitions. Second operand  has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 9 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (4), 4 states have call predecessors, (4), 1 states have call successors, (4)
[2021-08-29 16:33:13,426 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-08-29 16:33:13,426 INFO  L93              Difference]: Finished difference Result 27 states and 29 transitions.
[2021-08-29 16:33:13,427 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. 
[2021-08-29 16:33:13,428 INFO  L78                 Accepts]: Start accepts. Automaton has  has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 9 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (4), 4 states have call predecessors, (4), 1 states have call successors, (4) Word has length 16
[2021-08-29 16:33:13,429 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2021-08-29 16:33:13,430 INFO  L225             Difference]: With dead ends: 27
[2021-08-29 16:33:13,430 INFO  L226             Difference]: Without dead ends: 21
[2021-08-29 16:33:13,432 INFO  L927         BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 113.61ms TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156
[2021-08-29 16:33:13,434 INFO  L928         BasicCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 62.90ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.43ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 75.92ms IncrementalHoareTripleChecker+Time
[2021-08-29 16:33:13,436 INFO  L929         BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 38 Invalid, 94 Unknown, 0 Unchecked, 2.43ms Time], IncrementalHoareTripleChecker [2 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 75.92ms Time]
[2021-08-29 16:33:13,439 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 21 states.
[2021-08-29 16:33:13,447 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21.
[2021-08-29 16:33:13,448 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 21 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 15 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5)
[2021-08-29 16:33:13,449 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions.
[2021-08-29 16:33:13,450 INFO  L78                 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 16
[2021-08-29 16:33:13,451 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2021-08-29 16:33:13,452 INFO  L470      AbstractCegarLoop]: Abstraction has 21 states and 22 transitions.
[2021-08-29 16:33:13,452 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 9 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (4), 4 states have call predecessors, (4), 1 states have call successors, (4)
[2021-08-29 16:33:13,452 INFO  L276                IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions.
[2021-08-29 16:33:13,453 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 29
[2021-08-29 16:33:13,456 INFO  L505         BasicCegarLoop]: Found error trace
[2021-08-29 16:33:13,457 INFO  L513         BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1]
[2021-08-29 16:33:13,477 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0
[2021-08-29 16:33:13,667 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2021-08-29 16:33:13,668 INFO  L402      AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2021-08-29 16:33:13,668 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2021-08-29 16:33:13,669 INFO  L82        PathProgramCache]: Analyzing trace with hash 1769866774, now seen corresponding path program 2 times
[2021-08-29 16:33:13,669 INFO  L121   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2021-08-29 16:33:13,669 INFO  L332   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862386781]
[2021-08-29 16:33:13,669 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-08-29 16:33:13,669 INFO  L128          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2021-08-29 16:33:13,691 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is sat
[2021-08-29 16:33:13,692 INFO  L354             TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders.
[2021-08-29 16:33:13,713 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is sat
[2021-08-29 16:33:13,732 INFO  L133   FreeRefinementEngine]: Strategy CAMEL found a feasible trace
[2021-08-29 16:33:13,733 INFO  L627         BasicCegarLoop]: Counterexample is feasible
[2021-08-29 16:33:13,733 INFO  L764   garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining)
[2021-08-29 16:33:13,735 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2021-08-29 16:33:13,738 INFO  L179   ceAbstractionStarter]: Computing trace abstraction results
[2021-08-29 16:33:13,769 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.08 04:33:13 BoogieIcfgContainer
[2021-08-29 16:33:13,770 INFO  L132        PluginConnector]: ------------------------ END TraceAbstraction----------------------------
[2021-08-29 16:33:13,770 INFO  L113        PluginConnector]: ------------------------Witness Printer----------------------------
[2021-08-29 16:33:13,770 INFO  L271        PluginConnector]: Initializing Witness Printer...
[2021-08-29 16:33:13,770 INFO  L275        PluginConnector]: Witness Printer initialized
[2021-08-29 16:33:13,771 INFO  L185        PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 04:33:12" (3/4) ...
[2021-08-29 16:33:13,772 INFO  L131         WitnessPrinter]: Generating witness for reachability counterexample
[2021-08-29 16:33:13,807 INFO  L141         WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml
[2021-08-29 16:33:13,807 INFO  L132        PluginConnector]: ------------------------ END Witness Printer----------------------------
[2021-08-29 16:33:13,808 INFO  L158              Benchmark]: Toolchain (without parser) took 2247.27ms. Allocated memory was 67.1MB in the beginning and 90.2MB in the end (delta: 23.1MB). Free memory was 47.2MB in the beginning and 41.9MB in the end (delta: 5.3MB). Peak memory consumption was 28.3MB. Max. memory is 16.1GB.
[2021-08-29 16:33:13,808 INFO  L158              Benchmark]: CDTParser took 0.19ms. Allocated memory is still 67.1MB. Free memory was 48.5MB in the beginning and 48.4MB in the end (delta: 48.8kB). There was no memory consumed. Max. memory is 16.1GB.
[2021-08-29 16:33:13,808 INFO  L158              Benchmark]: CACSL2BoogieTranslator took 206.56ms. Allocated memory is still 67.1MB. Free memory was 47.0MB in the beginning and 37.9MB in the end (delta: 9.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB.
[2021-08-29 16:33:13,809 INFO  L158              Benchmark]: Boogie Procedure Inliner took 66.33ms. Allocated memory is still 67.1MB. Free memory was 37.9MB in the beginning and 49.8MB in the end (delta: -11.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB.
[2021-08-29 16:33:13,809 INFO  L158              Benchmark]: Boogie Preprocessor took 20.07ms. Allocated memory is still 67.1MB. Free memory was 49.8MB in the beginning and 49.1MB in the end (delta: 686.1kB). There was no memory consumed. Max. memory is 16.1GB.
[2021-08-29 16:33:13,810 INFO  L158              Benchmark]: RCFGBuilder took 220.53ms. Allocated memory is still 67.1MB. Free memory was 49.0MB in the beginning and 40.9MB in the end (delta: 8.2MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB.
[2021-08-29 16:33:13,810 INFO  L158              Benchmark]: TraceAbstraction took 1690.43ms. Allocated memory was 67.1MB in the beginning and 90.2MB in the end (delta: 23.1MB). Free memory was 40.4MB in the beginning and 44.0MB in the end (delta: -3.6MB). Peak memory consumption was 21.3MB. Max. memory is 16.1GB.
[2021-08-29 16:33:13,810 INFO  L158              Benchmark]: Witness Printer took 36.77ms. Allocated memory is still 90.2MB. Free memory was 44.0MB in the beginning and 41.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB.
[2021-08-29 16:33:13,813 INFO  L339   ainManager$Toolchain]: #######################  End [Toolchain 1] #######################
 --- Results ---
 * Results from de.uni_freiburg.informatik.ultimate.core:
  - StatisticsResult: Toolchain Benchmarks
    Benchmark results are:
 * CDTParser took 0.19ms. Allocated memory is still 67.1MB. Free memory was 48.5MB in the beginning and 48.4MB in the end (delta: 48.8kB). There was no memory consumed. Max. memory is 16.1GB.
 * CACSL2BoogieTranslator took 206.56ms. Allocated memory is still 67.1MB. Free memory was 47.0MB in the beginning and 37.9MB in the end (delta: 9.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB.
 * Boogie Procedure Inliner took 66.33ms. Allocated memory is still 67.1MB. Free memory was 37.9MB in the beginning and 49.8MB in the end (delta: -11.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB.
 * Boogie Preprocessor took 20.07ms. Allocated memory is still 67.1MB. Free memory was 49.8MB in the beginning and 49.1MB in the end (delta: 686.1kB). There was no memory consumed. Max. memory is 16.1GB.
 * RCFGBuilder took 220.53ms. Allocated memory is still 67.1MB. Free memory was 49.0MB in the beginning and 40.9MB in the end (delta: 8.2MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB.
 * TraceAbstraction took 1690.43ms. Allocated memory was 67.1MB in the beginning and 90.2MB in the end (delta: 23.1MB). Free memory was 40.4MB in the beginning and 44.0MB in the end (delta: -3.6MB). Peak memory consumption was 21.3MB. Max. memory is 16.1GB.
 * Witness Printer took 36.77ms. Allocated memory is still 90.2MB. Free memory was 44.0MB in the beginning and 41.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB.
 * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction:
  - StatisticsResult: ErrorAutomatonStatistics
    NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.00ms ErrorAutomatonConstructionTimeTotal, 0.00ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.00ms ErrorAutomatonConstructionTimeAvg, 0.00ms ErrorAutomatonDifferenceTimeAvg, 0.00ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0
  - CounterExampleResult [Line: 15]: a call to reach_error is reachable
    a call to reach_error is reachable
We found a FailurePath: 
[L12]              unsigned int input = __VERIFIER_nondet_uint();
[L13]  CALL, EXPR  id(input)
       VAL         [\old(x)=3]
[L7]   COND FALSE  !(x==0)
       VAL         [\old(x)=3, x=3]
[L8]   CALL, EXPR  id(x-1)
       VAL         [\old(x)=2]
[L7]   COND FALSE  !(x==0)
       VAL         [\old(x)=2, x=2]
[L8]   CALL, EXPR  id(x-1)
       VAL         [\old(x)=1]
[L7]   COND FALSE  !(x==0)
       VAL         [\old(x)=1, x=1]
[L8]   CALL, EXPR  id(x-1)
       VAL         [\old(x)=0]
[L7]   COND TRUE   x==0
[L7]               return 0;
       VAL         [\old(x)=0, \result=0, x=0]
[L8]   RET, EXPR   id(x-1)
       VAL         [\old(x)=1, id(x-1)=0, x=1]
[L8]               return id(x-1) + 1;
[L8]   RET, EXPR   id(x-1)
       VAL         [\old(x)=2, id(x-1)=1, x=2]
[L8]               return id(x-1) + 1;
[L8]   RET, EXPR   id(x-1)
       VAL         [\old(x)=3, id(x-1)=2, x=3]
[L8]               return id(x-1) + 1;
[L13]  RET, EXPR   id(input)
[L13]              unsigned int result = id(input);
[L14]  COND TRUE   result == 3
[L15]              reach_error()

  - StatisticsResult: Ultimate Automizer benchmark data
    CFG has 2 procedures, 16 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 1603.19ms, OverallIterations: 3, TraceHistogramMax: 4, EmptinessCheckTime: 15.56ms, AutomataDifference: 256.73ms, DeadEndRemovalTime: 0.00ms, HoareAnnotationTime: 0.00ms, InitialAbstractionConstructionTime: 11.86ms, PartialOrderReductionTime: 0.00ms, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 3 SdHoareTripleChecker+Valid, 154.77ms IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 3 mSDsluCounter, 54 SdHoareTripleChecker+Invalid, 114.51ms Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 127 mSDsCounter, 2 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 143 IncrementalHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 2 mSolverCounterUnsat, 9 mSDtfsCounter, 143 mSolverCounterSat, 3.94ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 48 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 154.74ms Time, 0.00ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=21occurred in iteration=2, InterpolantAutomatonStates: 16, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.00ms DumpTime, AutomataMinimizationStatistics: 28.28ms AutomataMinimizationTime, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 25.51ms SsaConstructionTime, 89.35ms SatisfiabilityAnalysisTime, 719.48ms InterpolantComputationTime, 70 NumberOfCodeBlocks, 70 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 54 ConstructedInterpolants, 0 QuantifiedInterpolants, 199 SizeOfPredicates, 1 NumberOfNonLiveVariables, 63 ConjunctsInSsa, 12 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, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available
RESULT: Ultimate proved your program to be incorrect!
[2021-08-29 16:33:13,852 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0
Received shutdown request...