./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 7b2dab56
Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa37fde2-531e-43af-9ae6-4588669fc8c2/bin/uautomizer-Z5i5R5N3CC/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa37fde2-531e-43af-9ae6-4588669fc8c2/bin/uautomizer-Z5i5R5N3CC/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa37fde2-531e-43af-9ae6-4588669fc8c2/bin/uautomizer-Z5i5R5N3CC/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa37fde2-531e-43af-9ae6-4588669fc8c2/bin/uautomizer-Z5i5R5N3CC/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/id_b3_o2-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa37fde2-531e-43af-9ae6-4588669fc8c2/bin/uautomizer-Z5i5R5N3CC/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa37fde2-531e-43af-9ae6-4588669fc8c2/bin/uautomizer-Z5i5R5N3CC --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 f919edf50b278085ea884360d609205059ef996b
................................................................................................................................................................................................................................................................................................................................................................................................................................................
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 0.2.0-7b2dab5
[2021-10-11 00:22:55,178 INFO L177 SettingsManager]: Resetting all preferences to default values...
[2021-10-11 00:22:55,181 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values
[2021-10-11 00:22:55,246 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2021-10-11 00:22:55,248 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2021-10-11 00:22:55,254 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2021-10-11 00:22:55,256 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2021-10-11 00:22:55,261 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values
[2021-10-11 00:22:55,264 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values
[2021-10-11 00:22:55,271 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values
[2021-10-11 00:22:55,272 INFO L181 SettingsManager]: Resetting Sifa preferences to default values
[2021-10-11 00:22:55,274 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2021-10-11 00:22:55,274 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values
[2021-10-11 00:22:55,279 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values
[2021-10-11 00:22:55,280 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2021-10-11 00:22:55,282 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values
[2021-10-11 00:22:55,285 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2021-10-11 00:22:55,290 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2021-10-11 00:22:55,292 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2021-10-11 00:22:55,296 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values
[2021-10-11 00:22:55,300 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2021-10-11 00:22:55,302 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values
[2021-10-11 00:22:55,303 INFO L181 SettingsManager]: Resetting Referee preferences to default values
[2021-10-11 00:22:55,305 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values
[2021-10-11 00:22:55,308 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2021-10-11 00:22:55,309 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2021-10-11 00:22:55,309 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values
[2021-10-11 00:22:55,311 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values
[2021-10-11 00:22:55,311 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values
[2021-10-11 00:22:55,313 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring...
[2021-10-11 00:22:55,313 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values
[2021-10-11 00:22:55,314 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2021-10-11 00:22:55,315 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values
[2021-10-11 00:22:55,316 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values
[2021-10-11 00:22:55,318 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2021-10-11 00:22:55,318 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values
[2021-10-11 00:22:55,319 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2021-10-11 00:22:55,319 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring...
[2021-10-11 00:22:55,320 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values
[2021-10-11 00:22:55,321 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values
[2021-10-11 00:22:55,321 INFO L188 SettingsManager]: Finished resetting all preferences to default values...
[2021-10-11 00:22:55,322 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa37fde2-531e-43af-9ae6-4588669fc8c2/bin/uautomizer-Z5i5R5N3CC/config/svcomp-Reach-32bit-Automizer_Default.epf
[2021-10-11 00:22:55,351 INFO L113 SettingsManager]: Loading preferences was successful
[2021-10-11 00:22:55,352 INFO L115 SettingsManager]: Preferences different from defaults after loading the file:
[2021-10-11 00:22:55,353 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2021-10-11 00:22:55,353 INFO L138 SettingsManager]: * Create parallel compositions if possible=false
[2021-10-11 00:22:55,354 INFO L138 SettingsManager]: * Use SBE=true
[2021-10-11 00:22:55,354 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2021-10-11 00:22:55,354 INFO L138 SettingsManager]: * sizeof long=4
[2021-10-11 00:22:55,354 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true
[2021-10-11 00:22:55,355 INFO L138 SettingsManager]: * sizeof POINTER=4
[2021-10-11 00:22:55,355 INFO L138 SettingsManager]: * Check division by zero=IGNORE
[2021-10-11 00:22:55,355 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE
[2021-10-11 00:22:55,355 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE
[2021-10-11 00:22:55,356 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE
[2021-10-11 00:22:55,356 INFO L138 SettingsManager]: * sizeof long double=12
[2021-10-11 00:22:55,356 INFO L138 SettingsManager]: * Check if freed pointer was valid=false
[2021-10-11 00:22:55,356 INFO L138 SettingsManager]: * Use constant arrays=true
[2021-10-11 00:22:55,356 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE
[2021-10-11 00:22:55,357 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2021-10-11 00:22:55,357 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements
[2021-10-11 00:22:55,357 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode
[2021-10-11 00:22:55,357 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2021-10-11 00:22:55,358 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2021-10-11 00:22:55,358 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP
[2021-10-11 00:22:55,358 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2021-10-11 00:22:55,358 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL
[2021-10-11 00:22:55,359 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2021-10-11 00:22:55,359 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2021-10-11 00:22:55,359 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE
[2021-10-11 00:22:55,359 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:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa37fde2-531e-43af-9ae6-4588669fc8c2/bin/uautomizer-Z5i5R5N3CC/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$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa37fde2-531e-43af-9ae6-4588669fc8c2/bin/uautomizer-Z5i5R5N3CC
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) )
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f919edf50b278085ea884360d609205059ef996b
[2021-10-11 00:22:55,629 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp
[2021-10-11 00:22:55,661 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2021-10-11 00:22:55,665 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2021-10-11 00:22:55,668 INFO L271 PluginConnector]: Initializing CDTParser...
[2021-10-11 00:22:55,669 INFO L275 PluginConnector]: CDTParser initialized
[2021-10-11 00:22:55,671 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa37fde2-531e-43af-9ae6-4588669fc8c2/bin/uautomizer-Z5i5R5N3CC/../../sv-benchmarks/c/recursive-simple/id_b3_o2-2.c
[2021-10-11 00:22:55,755 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa37fde2-531e-43af-9ae6-4588669fc8c2/bin/uautomizer-Z5i5R5N3CC/data/ebaf8121d/ef59cacc56e34dd29fd44c7081961bf3/FLAGaf23897d2
[2021-10-11 00:22:56,383 INFO L306 CDTParser]: Found 1 translation units.
[2021-10-11 00:22:56,384 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa37fde2-531e-43af-9ae6-4588669fc8c2/sv-benchmarks/c/recursive-simple/id_b3_o2-2.c
[2021-10-11 00:22:56,392 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa37fde2-531e-43af-9ae6-4588669fc8c2/bin/uautomizer-Z5i5R5N3CC/data/ebaf8121d/ef59cacc56e34dd29fd44c7081961bf3/FLAGaf23897d2
[2021-10-11 00:22:56,749 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa37fde2-531e-43af-9ae6-4588669fc8c2/bin/uautomizer-Z5i5R5N3CC/data/ebaf8121d/ef59cacc56e34dd29fd44c7081961bf3
[2021-10-11 00:22:56,757 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2021-10-11 00:22:56,759 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements.
[2021-10-11 00:22:56,760 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2021-10-11 00:22:56,761 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator...
[2021-10-11 00:22:56,764 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized
[2021-10-11 00:22:56,765 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 12:22:56" (1/1) ...
[2021-10-11 00:22:56,767 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6c1045da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:22:56, skipping insertion in model container
[2021-10-11 00:22:56,768 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 12:22:56" (1/1) ...
[2021-10-11 00:22:56,776 INFO L145 MainTranslator]: Starting translation in SV-COMP mode
[2021-10-11 00:22:56,790 INFO L178 MainTranslator]: Built tables and reachable declarations
[2021-10-11 00:22:56,967 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa37fde2-531e-43af-9ae6-4588669fc8c2/sv-benchmarks/c/recursive-simple/id_b3_o2-2.c[528,541]
[2021-10-11 00:22:56,972 INFO L206 PostProcessor]: Analyzing one entry point: main
[2021-10-11 00:22:56,984 INFO L203 MainTranslator]: Completed pre-run
[2021-10-11 00:22:57,034 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa37fde2-531e-43af-9ae6-4588669fc8c2/sv-benchmarks/c/recursive-simple/id_b3_o2-2.c[528,541]
[2021-10-11 00:22:57,042 INFO L206 PostProcessor]: Analyzing one entry point: main
[2021-10-11 00:22:57,060 INFO L208 MainTranslator]: Completed translation
[2021-10-11 00:22:57,061 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:22:57 WrapperNode
[2021-10-11 00:22:57,061 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2021-10-11 00:22:57,062 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2021-10-11 00:22:57,063 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner...
[2021-10-11 00:22:57,063 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized
[2021-10-11 00:22:57,073 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:22:57" (1/1) ...
[2021-10-11 00:22:57,080 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:22:57" (1/1) ...
[2021-10-11 00:22:57,098 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2021-10-11 00:22:57,099 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2021-10-11 00:22:57,100 INFO L271 PluginConnector]: Initializing Boogie Preprocessor...
[2021-10-11 00:22:57,100 INFO L275 PluginConnector]: Boogie Preprocessor initialized
[2021-10-11 00:22:57,109 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:22:57" (1/1) ...
[2021-10-11 00:22:57,110 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:22:57" (1/1) ...
[2021-10-11 00:22:57,111 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:22:57" (1/1) ...
[2021-10-11 00:22:57,112 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:22:57" (1/1) ...
[2021-10-11 00:22:57,115 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:22:57" (1/1) ...
[2021-10-11 00:22:57,117 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:22:57" (1/1) ...
[2021-10-11 00:22:57,118 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:22:57" (1/1) ...
[2021-10-11 00:22:57,120 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2021-10-11 00:22:57,121 INFO L113 PluginConnector]: ------------------------RCFGBuilder----------------------------
[2021-10-11 00:22:57,122 INFO L271 PluginConnector]: Initializing RCFGBuilder...
[2021-10-11 00:22:57,122 INFO L275 PluginConnector]: RCFGBuilder initialized
[2021-10-11 00:22:57,123 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:22:57" (1/1) ...
No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa37fde2-531e-43af-9ae6-4588669fc8c2/bin/uautomizer-Z5i5R5N3CC/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
[2021-10-11 00:22:57,209 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2021-10-11 00:22:57,210 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2021-10-11 00:22:57,210 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int
[2021-10-11 00:22:57,210 INFO L130 BoogieDeclarations]: Found specification of procedure id
[2021-10-11 00:22:57,210 INFO L138 BoogieDeclarations]: Found implementation of procedure id
[2021-10-11 00:22:57,210 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack
[2021-10-11 00:22:57,406 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2021-10-11 00:22:57,406 INFO L299 CfgBuilder]: Removed 4 assume(true) statements.
[2021-10-11 00:22:57,409 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 12:22:57 BoogieIcfgContainer
[2021-10-11 00:22:57,409 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2021-10-11 00:22:57,412 INFO L113 PluginConnector]: ------------------------TraceAbstraction----------------------------
[2021-10-11 00:22:57,412 INFO L271 PluginConnector]: Initializing TraceAbstraction...
[2021-10-11 00:22:57,416 INFO L275 PluginConnector]: TraceAbstraction initialized
[2021-10-11 00:22:57,423 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 12:22:56" (1/3) ...
[2021-10-11 00:22:57,424 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@406e8d82 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 12:22:57, skipping insertion in model container
[2021-10-11 00:22:57,424 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:22:57" (2/3) ...
[2021-10-11 00:22:57,425 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@406e8d82 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 12:22:57, skipping insertion in model container
[2021-10-11 00:22:57,425 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 12:22:57" (3/3) ...
[2021-10-11 00:22:57,427 INFO L111 eAbstractionObserver]: Analyzing ICFG id_b3_o2-2.c
[2021-10-11 00:22:57,445 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2021-10-11 00:22:57,448 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2021-10-11 00:22:57,460 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2021-10-11 00:22:57,487 INFO L377 AbstractCegarLoop]: Interprodecural is true
[2021-10-11 00:22:57,487 INFO L378 AbstractCegarLoop]: Hoare is true
[2021-10-11 00:22:57,487 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP
[2021-10-11 00:22:57,487 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2021-10-11 00:22:57,487 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2021-10-11 00:22:57,487 INFO L382 AbstractCegarLoop]: Difference is false
[2021-10-11 00:22:57,488 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2021-10-11 00:22:57,488 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2021-10-11 00:22:57,503 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states.
[2021-10-11 00:22:57,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11
[2021-10-11 00:22:57,524 INFO L414 BasicCegarLoop]: Found error trace
[2021-10-11 00:22:57,525 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2021-10-11 00:22:57,526 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2021-10-11 00:22:57,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2021-10-11 00:22:57,534 INFO L82 PathProgramCache]: Analyzing trace with hash -1972897208, now seen corresponding path program 1 times
[2021-10-11 00:22:57,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2021-10-11 00:22:57,545 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546314530]
[2021-10-11 00:22:57,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-10-11 00:22:57,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-10-11 00:22:57,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2
[2021-10-11 00:22:57,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-10-11 00:22:57,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2021-10-11 00:22:57,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546314530]
[2021-10-11 00:22:57,835 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2021-10-11 00:22:57,835 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2021-10-11 00:22:57,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854957484]
[2021-10-11 00:22:57,857 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states
[2021-10-11 00:22:57,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2021-10-11 00:22:57,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2021-10-11 00:22:57,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2021-10-11 00:22:57,910 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 5 states.
[2021-10-11 00:22:57,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-10-11 00:22:57,977 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions.
[2021-10-11 00:22:57,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states.
[2021-10-11 00:22:57,979 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10
[2021-10-11 00:22:57,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2021-10-11 00:22:57,988 INFO L225 Difference]: With dead ends: 29
[2021-10-11 00:22:57,989 INFO L226 Difference]: Without dead ends: 16
[2021-10-11 00:22:57,992 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2021-10-11 00:22:58,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states.
[2021-10-11 00:22:58,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16.
[2021-10-11 00:22:58,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states.
[2021-10-11 00:22:58,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions.
[2021-10-11 00:22:58,040 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 10
[2021-10-11 00:22:58,040 INFO L84 Accepts]: Finished accepts. word is rejected.
[2021-10-11 00:22:58,041 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions.
[2021-10-11 00:22:58,041 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states.
[2021-10-11 00:22:58,041 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions.
[2021-10-11 00:22:58,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18
[2021-10-11 00:22:58,043 INFO L414 BasicCegarLoop]: Found error trace
[2021-10-11 00:22:58,043 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2021-10-11 00:22:58,044 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2021-10-11 00:22:58,044 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2021-10-11 00:22:58,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2021-10-11 00:22:58,045 INFO L82 PathProgramCache]: Analyzing trace with hash 1641441273, now seen corresponding path program 1 times
[2021-10-11 00:22:58,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2021-10-11 00:22:58,046 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116152204]
[2021-10-11 00:22:58,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-10-11 00:22:58,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-10-11 00:22:58,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2
[2021-10-11 00:22:58,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-10-11 00:22:58,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2
[2021-10-11 00:22:58,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-10-11 00:22:58,293 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked.
[2021-10-11 00:22:58,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116152204]
[2021-10-11 00:22:58,294 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2021-10-11 00:22:58,295 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2021-10-11 00:22:58,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579875205]
[2021-10-11 00:22:58,297 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states
[2021-10-11 00:22:58,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2021-10-11 00:22:58,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2021-10-11 00:22:58,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2021-10-11 00:22:58,299 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 5 states.
[2021-10-11 00:22:58,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-10-11 00:22:58,321 INFO L93 Difference]: Finished difference Result 28 states and 33 transitions.
[2021-10-11 00:22:58,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states.
[2021-10-11 00:22:58,323 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17
[2021-10-11 00:22:58,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2021-10-11 00:22:58,324 INFO L225 Difference]: With dead ends: 28
[2021-10-11 00:22:58,324 INFO L226 Difference]: Without dead ends: 20
[2021-10-11 00:22:58,326 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2021-10-11 00:22:58,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states.
[2021-10-11 00:22:58,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 18.
[2021-10-11 00:22:58,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states.
[2021-10-11 00:22:58,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions.
[2021-10-11 00:22:58,334 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 17
[2021-10-11 00:22:58,334 INFO L84 Accepts]: Finished accepts. word is rejected.
[2021-10-11 00:22:58,334 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions.
[2021-10-11 00:22:58,335 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states.
[2021-10-11 00:22:58,335 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions.
[2021-10-11 00:22:58,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18
[2021-10-11 00:22:58,336 INFO L414 BasicCegarLoop]: Found error trace
[2021-10-11 00:22:58,336 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2021-10-11 00:22:58,337 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2021-10-11 00:22:58,337 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2021-10-11 00:22:58,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2021-10-11 00:22:58,338 INFO L82 PathProgramCache]: Analyzing trace with hash 1670070424, now seen corresponding path program 1 times
[2021-10-11 00:22:58,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2021-10-11 00:22:58,339 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906309499]
[2021-10-11 00:22:58,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-10-11 00:22:58,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-10-11 00:22:58,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2
[2021-10-11 00:22:58,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-10-11 00:22:58,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2
[2021-10-11 00:22:58,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-10-11 00:22:58,518 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked.
[2021-10-11 00:22:58,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906309499]
[2021-10-11 00:22:58,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375149639]
[2021-10-11 00:22:58,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa37fde2-531e-43af-9ae6-4588669fc8c2/bin/uautomizer-Z5i5R5N3CC/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
[2021-10-11 00:22:58,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-10-11 00:22:58,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 7 conjunts are in the unsatisfiable core
[2021-10-11 00:22:58,588 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2021-10-11 00:22:58,710 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked.
[2021-10-11 00:22:58,711 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2021-10-11 00:22:58,711 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9
[2021-10-11 00:22:58,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36405912]
[2021-10-11 00:22:58,712 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states
[2021-10-11 00:22:58,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2021-10-11 00:22:58,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants.
[2021-10-11 00:22:58,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72
[2021-10-11 00:22:58,714 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 9 states.
[2021-10-11 00:22:58,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-10-11 00:22:58,787 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions.
[2021-10-11 00:22:58,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states.
[2021-10-11 00:22:58,789 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 17
[2021-10-11 00:22:58,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2021-10-11 00:22:58,791 INFO L225 Difference]: With dead ends: 24
[2021-10-11 00:22:58,791 INFO L226 Difference]: Without dead ends: 20
[2021-10-11 00:22:58,792 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90
[2021-10-11 00:22:58,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states.
[2021-10-11 00:22:58,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20.
[2021-10-11 00:22:58,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states.
[2021-10-11 00:22:58,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions.
[2021-10-11 00:22:58,798 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 17
[2021-10-11 00:22:58,798 INFO L84 Accepts]: Finished accepts. word is rejected.
[2021-10-11 00:22:58,798 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions.
[2021-10-11 00:22:58,807 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states.
[2021-10-11 00:22:58,807 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions.
[2021-10-11 00:22:58,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25
[2021-10-11 00:22:58,808 INFO L414 BasicCegarLoop]: Found error trace
[2021-10-11 00:22:58,808 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2021-10-11 00:22:59,009 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2
[2021-10-11 00:22:59,009 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2021-10-11 00:22:59,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2021-10-11 00:22:59,010 INFO L82 PathProgramCache]: Analyzing trace with hash -755943847, now seen corresponding path program 1 times
[2021-10-11 00:22:59,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2021-10-11 00:22:59,011 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62641152]
[2021-10-11 00:22:59,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-10-11 00:22:59,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-10-11 00:22:59,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2
[2021-10-11 00:22:59,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-10-11 00:22:59,131 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2
[2021-10-11 00:22:59,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-10-11 00:22:59,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2
[2021-10-11 00:22:59,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-10-11 00:22:59,153 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked.
[2021-10-11 00:22:59,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62641152]
[2021-10-11 00:22:59,155 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2021-10-11 00:22:59,155 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2021-10-11 00:22:59,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82872374]
[2021-10-11 00:22:59,156 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states
[2021-10-11 00:22:59,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2021-10-11 00:22:59,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2021-10-11 00:22:59,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2021-10-11 00:22:59,159 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 5 states.
[2021-10-11 00:22:59,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-10-11 00:22:59,181 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions.
[2021-10-11 00:22:59,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states.
[2021-10-11 00:22:59,182 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24
[2021-10-11 00:22:59,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2021-10-11 00:22:59,184 INFO L225 Difference]: With dead ends: 26
[2021-10-11 00:22:59,184 INFO L226 Difference]: Without dead ends: 22
[2021-10-11 00:22:59,185 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2021-10-11 00:22:59,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states.
[2021-10-11 00:22:59,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 20.
[2021-10-11 00:22:59,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states.
[2021-10-11 00:22:59,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions.
[2021-10-11 00:22:59,195 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 24
[2021-10-11 00:22:59,195 INFO L84 Accepts]: Finished accepts. word is rejected.
[2021-10-11 00:22:59,196 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions.
[2021-10-11 00:22:59,196 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states.
[2021-10-11 00:22:59,196 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions.
[2021-10-11 00:22:59,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25
[2021-10-11 00:22:59,198 INFO L414 BasicCegarLoop]: Found error trace
[2021-10-11 00:22:59,199 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1]
[2021-10-11 00:22:59,199 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3
[2021-10-11 00:22:59,199 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2021-10-11 00:22:59,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2021-10-11 00:22:59,200 INFO L82 PathProgramCache]: Analyzing trace with hash -727314696, now seen corresponding path program 2 times
[2021-10-11 00:22:59,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2021-10-11 00:22:59,201 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923085945]
[2021-10-11 00:22:59,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-10-11 00:22:59,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat
[2021-10-11 00:22:59,263 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders.
[2021-10-11 00:22:59,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat
[2021-10-11 00:22:59,324 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders.
[2021-10-11 00:22:59,348 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace
[2021-10-11 00:22:59,348 INFO L523 BasicCegarLoop]: Counterexample might be feasible
[2021-10-11 00:22:59,349 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4
[2021-10-11 00:22:59,398 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.10 12:22:59 BoogieIcfgContainer
[2021-10-11 00:22:59,399 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction----------------------------
[2021-10-11 00:22:59,399 INFO L113 PluginConnector]: ------------------------Witness Printer----------------------------
[2021-10-11 00:22:59,399 INFO L271 PluginConnector]: Initializing Witness Printer...
[2021-10-11 00:22:59,400 INFO L275 PluginConnector]: Witness Printer initialized
[2021-10-11 00:22:59,400 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 12:22:57" (3/4) ...
[2021-10-11 00:22:59,402 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample
[2021-10-11 00:22:59,448 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa37fde2-531e-43af-9ae6-4588669fc8c2/bin/uautomizer-Z5i5R5N3CC/witness.graphml
[2021-10-11 00:22:59,449 INFO L132 PluginConnector]: ------------------------ END Witness Printer----------------------------
[2021-10-11 00:22:59,450 INFO L168 Benchmark]: Toolchain (without parser) took 2690.63 ms. Allocated memory was 102.8 MB in the beginning and 136.3 MB in the end (delta: 33.6 MB). Free memory was 76.6 MB in the beginning and 94.1 MB in the end (delta: -17.5 MB). Peak memory consumption was 15.3 MB. Max. memory is 16.1 GB.
[2021-10-11 00:22:59,451 INFO L168 Benchmark]: CDTParser took 0.55 ms. Allocated memory is still 102.8 MB. Free memory was 61.7 MB in the beginning and 61.6 MB in the end (delta: 51.5 kB). There was no memory consumed. Max. memory is 16.1 GB.
[2021-10-11 00:22:59,452 INFO L168 Benchmark]: CACSL2BoogieTranslator took 301.16 ms. Allocated memory is still 102.8 MB. Free memory was 76.5 MB in the beginning and 79.3 MB in the end (delta: -2.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB.
[2021-10-11 00:22:59,453 INFO L168 Benchmark]: Boogie Procedure Inliner took 36.36 ms. Allocated memory is still 102.8 MB. Free memory was 79.3 MB in the beginning and 78.0 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB.
[2021-10-11 00:22:59,453 INFO L168 Benchmark]: Boogie Preprocessor took 21.08 ms. Allocated memory is still 102.8 MB. Free memory was 78.0 MB in the beginning and 77.1 MB in the end (delta: 864.2 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB.
[2021-10-11 00:22:59,454 INFO L168 Benchmark]: RCFGBuilder took 288.19 ms. Allocated memory is still 102.8 MB. Free memory was 77.1 MB in the beginning and 65.5 MB in the end (delta: 11.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB.
[2021-10-11 00:22:59,455 INFO L168 Benchmark]: TraceAbstraction took 1987.07 ms. Allocated memory was 102.8 MB in the beginning and 136.3 MB in the end (delta: 33.6 MB). Free memory was 65.2 MB in the beginning and 96.9 MB in the end (delta: -31.7 MB). Peak memory consumption was 4.7 MB. Max. memory is 16.1 GB.
[2021-10-11 00:22:59,464 INFO L168 Benchmark]: Witness Printer took 49.43 ms. Allocated memory is still 136.3 MB. Free memory was 96.9 MB in the beginning and 94.1 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB.
[2021-10-11 00:22:59,468 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] #######################
--- Results ---
* Results from de.uni_freiburg.informatik.ultimate.core:
- StatisticsResult: Toolchain Benchmarks
Benchmark results are:
* CDTParser took 0.55 ms. Allocated memory is still 102.8 MB. Free memory was 61.7 MB in the beginning and 61.6 MB in the end (delta: 51.5 kB). There was no memory consumed. Max. memory is 16.1 GB.
* CACSL2BoogieTranslator took 301.16 ms. Allocated memory is still 102.8 MB. Free memory was 76.5 MB in the beginning and 79.3 MB in the end (delta: -2.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB.
* Boogie Procedure Inliner took 36.36 ms. Allocated memory is still 102.8 MB. Free memory was 79.3 MB in the beginning and 78.0 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB.
* Boogie Preprocessor took 21.08 ms. Allocated memory is still 102.8 MB. Free memory was 78.0 MB in the beginning and 77.1 MB in the end (delta: 864.2 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB.
* RCFGBuilder took 288.19 ms. Allocated memory is still 102.8 MB. Free memory was 77.1 MB in the beginning and 65.5 MB in the end (delta: 11.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB.
* TraceAbstraction took 1987.07 ms. Allocated memory was 102.8 MB in the beginning and 136.3 MB in the end (delta: 33.6 MB). Free memory was 65.2 MB in the beginning and 96.9 MB in the end (delta: -31.7 MB). Peak memory consumption was 4.7 MB. Max. memory is 16.1 GB.
* Witness Printer took 49.43 ms. Allocated memory is still 136.3 MB. Free memory was 96.9 MB in the beginning and 94.1 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB.
* Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction:
- CounterExampleResult [Line: 17]: a call to reach_error is reachable
a call to reach_error is reachable
We found a FailurePath:
[L14] int input = __VERIFIER_nondet_int();
[L15] CALL, EXPR id(input)
VAL [\old(x)=2]
[L7] COND FALSE !(x==0)
VAL [\old(x)=2, x=2]
[L8] CALL, EXPR id((unsigned int)x-1)
VAL [\old(x)=1]
[L7] COND FALSE !(x==0)
VAL [\old(x)=1, x=1]
[L8] CALL, EXPR id((unsigned int)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((unsigned int)x-1)
VAL [\old(x)=1, id((unsigned int)x-1)=0, x=1]
[L8] int ret = id((unsigned int)x-1) + 1;
[L9] COND FALSE !(ret > 3)
[L10] return ret;
VAL [\old(x)=1, \result=1, ret=1, x=1]
[L8] RET, EXPR id((unsigned int)x-1)
VAL [\old(x)=2, id((unsigned int)x-1)=1, x=2]
[L8] int ret = id((unsigned int)x-1) + 1;
[L9] COND FALSE !(ret > 3)
[L10] return ret;
VAL [\old(x)=2, \result=2, ret=2, x=2]
[L15] RET, EXPR id(input)
[L15] int result = id(input);
[L16] COND TRUE result == 2
[L17] reach_error()
- StatisticsResult: Ultimate Automizer benchmark data
CFG has 2 procedures, 17 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.8s, OverallIterations: 5, TraceHistogramMax: 3, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 65 SDtfs, 7 SDslu, 208 SDs, 0 SdLazy, 60 SolverSat, 1 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 57 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=20occurred in iteration=3, 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, 4 MinimizatonAttempts, 4 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 109 NumberOfCodeBlocks, 109 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 80 ConstructedInterpolants, 0 QuantifiedInterpolants, 2274 SizeOfPredicates, 1 NumberOfNonLiveVariables, 72 ConjunctsInSsa, 7 ConjunctsInUnsatCore, 5 InterpolantComputations, 3 PerfectInterpolantSequences, 23/27 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!
Received shutdown request...