./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/sum_2x3_false-unreach-call_true-termination.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0cd3be1d Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_f65fa42b-e327-489c-9e43-3e1b49d8c680/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_f65fa42b-e327-489c-9e43-3e1b49d8c680/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_f65fa42b-e327-489c-9e43-3e1b49d8c680/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_f65fa42b-e327-489c-9e43-3e1b49d8c680/bin-2019/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/sum_2x3_false-unreach-call_true-termination.c -s /tmp/vcloud-vcloud-master/worker/working_dir_f65fa42b-e327-489c-9e43-3e1b49d8c680/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_f65fa42b-e327-489c-9e43-3e1b49d8c680/bin-2019/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 5417ea5971c5cfa3624e07fbe8bf33ef4632cb6f ................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.1.23-0cd3be1 [2018-11-28 11:44:25,190 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-28 11:44:25,191 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-28 11:44:25,198 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-28 11:44:25,198 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-28 11:44:25,199 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-28 11:44:25,199 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-28 11:44:25,200 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-28 11:44:25,201 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-28 11:44:25,202 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-28 11:44:25,203 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-28 11:44:25,203 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-28 11:44:25,203 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-28 11:44:25,204 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-28 11:44:25,205 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-28 11:44:25,205 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-28 11:44:25,206 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-28 11:44:25,208 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-28 11:44:25,209 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-28 11:44:25,210 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-28 11:44:25,211 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-28 11:44:25,211 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-28 11:44:25,213 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-28 11:44:25,213 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-28 11:44:25,213 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-28 11:44:25,214 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-28 11:44:25,215 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-28 11:44:25,215 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-28 11:44:25,216 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-28 11:44:25,216 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-28 11:44:25,216 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-28 11:44:25,217 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-28 11:44:25,217 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-28 11:44:25,217 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-28 11:44:25,218 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-28 11:44:25,218 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-28 11:44:25,219 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_f65fa42b-e327-489c-9e43-3e1b49d8c680/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2018-11-28 11:44:25,227 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-28 11:44:25,227 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-28 11:44:25,227 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-28 11:44:25,227 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-11-28 11:44:25,228 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-28 11:44:25,228 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-28 11:44:25,228 INFO L133 SettingsManager]: * Use SBE=true [2018-11-28 11:44:25,228 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-28 11:44:25,228 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-28 11:44:25,228 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-28 11:44:25,228 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-28 11:44:25,229 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-28 11:44:25,229 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-28 11:44:25,229 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-28 11:44:25,229 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-28 11:44:25,229 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-28 11:44:25,229 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-28 11:44:25,229 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-28 11:44:25,229 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-28 11:44:25,230 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-28 11:44:25,230 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-28 11:44:25,230 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-28 11:44:25,230 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-28 11:44:25,230 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-28 11:44:25,230 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-28 11:44:25,230 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-28 11:44:25,231 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-28 11:44:25,231 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-11-28 11:44:25,231 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-28 11:44:25,231 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-28 11:44:25,231 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/working_dir_f65fa42b-e327-489c-9e43-3e1b49d8c680/bin-2019/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5417ea5971c5cfa3624e07fbe8bf33ef4632cb6f [2018-11-28 11:44:25,255 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-28 11:44:25,264 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-28 11:44:25,266 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-28 11:44:25,267 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-28 11:44:25,267 INFO L276 PluginConnector]: CDTParser initialized [2018-11-28 11:44:25,268 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_f65fa42b-e327-489c-9e43-3e1b49d8c680/bin-2019/uautomizer/../../sv-benchmarks/c/recursive-simple/sum_2x3_false-unreach-call_true-termination.c [2018-11-28 11:44:25,301 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_f65fa42b-e327-489c-9e43-3e1b49d8c680/bin-2019/uautomizer/data/42e617220/23bf9a901fdb496880c1d5f4734a4bb4/FLAG991bbbb73 [2018-11-28 11:44:25,700 INFO L307 CDTParser]: Found 1 translation units. [2018-11-28 11:44:25,701 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_f65fa42b-e327-489c-9e43-3e1b49d8c680/sv-benchmarks/c/recursive-simple/sum_2x3_false-unreach-call_true-termination.c [2018-11-28 11:44:25,704 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_f65fa42b-e327-489c-9e43-3e1b49d8c680/bin-2019/uautomizer/data/42e617220/23bf9a901fdb496880c1d5f4734a4bb4/FLAG991bbbb73 [2018-11-28 11:44:25,714 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_f65fa42b-e327-489c-9e43-3e1b49d8c680/bin-2019/uautomizer/data/42e617220/23bf9a901fdb496880c1d5f4734a4bb4 [2018-11-28 11:44:25,716 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-28 11:44:25,718 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-28 11:44:25,719 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-28 11:44:25,719 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-28 11:44:25,722 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-28 11:44:25,723 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 11:44:25" (1/1) ... [2018-11-28 11:44:25,724 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@261ff106 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:44:25, skipping insertion in model container [2018-11-28 11:44:25,725 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 11:44:25" (1/1) ... [2018-11-28 11:44:25,730 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-28 11:44:25,739 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-28 11:44:25,830 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-11-28 11:44:25,832 INFO L191 MainTranslator]: Completed pre-run [2018-11-28 11:44:25,841 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-11-28 11:44:25,848 INFO L195 MainTranslator]: Completed translation [2018-11-28 11:44:25,849 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:44:25 WrapperNode [2018-11-28 11:44:25,849 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-28 11:44:25,849 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-28 11:44:25,850 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-28 11:44:25,850 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-28 11:44:25,856 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:44:25" (1/1) ... [2018-11-28 11:44:25,859 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:44:25" (1/1) ... [2018-11-28 11:44:25,863 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-28 11:44:25,863 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-28 11:44:25,863 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-28 11:44:25,864 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-28 11:44:25,869 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:44:25" (1/1) ... [2018-11-28 11:44:25,869 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:44:25" (1/1) ... [2018-11-28 11:44:25,869 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:44:25" (1/1) ... [2018-11-28 11:44:25,870 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:44:25" (1/1) ... [2018-11-28 11:44:25,872 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:44:25" (1/1) ... [2018-11-28 11:44:25,874 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:44:25" (1/1) ... [2018-11-28 11:44:25,874 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:44:25" (1/1) ... [2018-11-28 11:44:25,875 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-28 11:44:25,876 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-28 11:44:25,876 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-28 11:44:25,876 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-28 11:44:25,877 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:44:25" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f65fa42b-e327-489c-9e43-3e1b49d8c680/bin-2019/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-28 11:44:25,963 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-28 11:44:25,963 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-28 11:44:25,963 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-28 11:44:25,963 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-28 11:44:25,963 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2018-11-28 11:44:25,963 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2018-11-28 11:44:25,963 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-28 11:44:25,963 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-28 11:44:26,059 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-28 11:44:26,059 INFO L280 CfgBuilder]: Removed 0 assue(true) statements. [2018-11-28 11:44:26,060 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 11:44:26 BoogieIcfgContainer [2018-11-28 11:44:26,060 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-28 11:44:26,060 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-28 11:44:26,060 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-28 11:44:26,062 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-28 11:44:26,062 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 11:44:25" (1/3) ... [2018-11-28 11:44:26,063 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ed34cab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 11:44:26, skipping insertion in model container [2018-11-28 11:44:26,063 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:44:25" (2/3) ... [2018-11-28 11:44:26,063 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ed34cab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 11:44:26, skipping insertion in model container [2018-11-28 11:44:26,063 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 11:44:26" (3/3) ... [2018-11-28 11:44:26,064 INFO L112 eAbstractionObserver]: Analyzing ICFG sum_2x3_false-unreach-call_true-termination.c [2018-11-28 11:44:26,070 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-28 11:44:26,074 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-28 11:44:26,083 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-28 11:44:26,100 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-11-28 11:44:26,100 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-28 11:44:26,100 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-28 11:44:26,100 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-28 11:44:26,101 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-28 11:44:26,101 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-28 11:44:26,101 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-28 11:44:26,101 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-28 11:44:26,101 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-28 11:44:26,113 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2018-11-28 11:44:26,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-11-28 11:44:26,117 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 11:44:26,118 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 11:44:26,120 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 11:44:26,124 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 11:44:26,125 INFO L82 PathProgramCache]: Analyzing trace with hash 2001781660, now seen corresponding path program 1 times [2018-11-28 11:44:26,126 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 11:44:26,126 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 11:44:26,163 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:44:26,163 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 11:44:26,163 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:44:26,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 11:44:26,253 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 11:44:26,255 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 11:44:26,255 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-28 11:44:26,259 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-28 11:44:26,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-28 11:44:26,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-28 11:44:26,273 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2018-11-28 11:44:26,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 11:44:26,351 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2018-11-28 11:44:26,352 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-28 11:44:26,353 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2018-11-28 11:44:26,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 11:44:26,360 INFO L225 Difference]: With dead ends: 30 [2018-11-28 11:44:26,360 INFO L226 Difference]: Without dead ends: 18 [2018-11-28 11:44:26,362 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-11-28 11:44:26,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-11-28 11:44:26,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-11-28 11:44:26,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-11-28 11:44:26,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2018-11-28 11:44:26,392 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2018-11-28 11:44:26,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 11:44:26,392 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2018-11-28 11:44:26,392 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-28 11:44:26,392 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2018-11-28 11:44:26,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-11-28 11:44:26,393 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 11:44:26,394 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 11:44:26,394 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 11:44:26,394 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 11:44:26,394 INFO L82 PathProgramCache]: Analyzing trace with hash -118151420, now seen corresponding path program 1 times [2018-11-28 11:44:26,394 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 11:44:26,394 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 11:44:26,395 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:44:26,395 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 11:44:26,395 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:44:26,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 11:44:26,451 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-28 11:44:26,451 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 11:44:26,451 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f65fa42b-e327-489c-9e43-3e1b49d8c680/bin-2019/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 11:44:26,460 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 11:44:26,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 11:44:26,482 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 11:44:26,507 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-28 11:44:26,528 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 11:44:26,528 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-11-28 11:44:26,529 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-28 11:44:26,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-28 11:44:26,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-11-28 11:44:26,529 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 6 states. [2018-11-28 11:44:26,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 11:44:26,608 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2018-11-28 11:44:26,608 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-28 11:44:26,608 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2018-11-28 11:44:26,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 11:44:26,609 INFO L225 Difference]: With dead ends: 25 [2018-11-28 11:44:26,609 INFO L226 Difference]: Without dead ends: 21 [2018-11-28 11:44:26,610 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-11-28 11:44:26,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-11-28 11:44:26,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-11-28 11:44:26,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-11-28 11:44:26,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-11-28 11:44:26,614 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2018-11-28 11:44:26,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 11:44:26,614 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2018-11-28 11:44:26,614 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-28 11:44:26,615 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2018-11-28 11:44:26,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-11-28 11:44:26,615 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 11:44:26,615 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 11:44:26,616 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 11:44:26,616 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 11:44:26,616 INFO L82 PathProgramCache]: Analyzing trace with hash 764931548, now seen corresponding path program 2 times [2018-11-28 11:44:26,616 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 11:44:26,616 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 11:44:26,617 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:44:26,617 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 11:44:26,617 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:44:26,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 11:44:26,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 11:44:26,659 INFO L469 BasicCegarLoop]: Counterexample might be feasible [2018-11-28 11:44:26,680 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 11:44:26 BoogieIcfgContainer [2018-11-28 11:44:26,680 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-28 11:44:26,681 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-28 11:44:26,681 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-28 11:44:26,681 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-28 11:44:26,681 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 11:44:26" (3/4) ... [2018-11-28 11:44:26,683 INFO L138 WitnessPrinter]: Generating witness for reachability counterexample [2018-11-28 11:44:26,720 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_f65fa42b-e327-489c-9e43-3e1b49d8c680/bin-2019/uautomizer/witness.graphml [2018-11-28 11:44:26,720 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-28 11:44:26,721 INFO L168 Benchmark]: Toolchain (without parser) took 1003.99 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 129.0 MB). Free memory was 953.3 MB in the beginning and 1.1 GB in the end (delta: -102.5 MB). Peak memory consumption was 26.4 MB. Max. memory is 11.5 GB. [2018-11-28 11:44:26,722 INFO L168 Benchmark]: CDTParser took 0.10 ms. Allocated memory is still 1.0 GB. Free memory is still 985.0 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-28 11:44:26,722 INFO L168 Benchmark]: CACSL2BoogieTranslator took 130.46 ms. Allocated memory is still 1.0 GB. Free memory was 953.3 MB in the beginning and 942.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-11-28 11:44:26,722 INFO L168 Benchmark]: Boogie Procedure Inliner took 13.84 ms. Allocated memory is still 1.0 GB. Free memory is still 942.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-28 11:44:26,723 INFO L168 Benchmark]: Boogie Preprocessor took 12.00 ms. Allocated memory is still 1.0 GB. Free memory is still 942.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-28 11:44:26,723 INFO L168 Benchmark]: RCFGBuilder took 184.08 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 129.0 MB). Free memory was 942.6 MB in the beginning and 1.1 GB in the end (delta: -169.0 MB). Peak memory consumption was 15.7 MB. Max. memory is 11.5 GB. [2018-11-28 11:44:26,723 INFO L168 Benchmark]: TraceAbstraction took 620.14 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 55.7 MB). Peak memory consumption was 55.7 MB. Max. memory is 11.5 GB. [2018-11-28 11:44:26,723 INFO L168 Benchmark]: Witness Printer took 39.79 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-28 11:44:26,725 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10 ms. Allocated memory is still 1.0 GB. Free memory is still 985.0 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 130.46 ms. Allocated memory is still 1.0 GB. Free memory was 953.3 MB in the beginning and 942.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 13.84 ms. Allocated memory is still 1.0 GB. Free memory is still 942.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 12.00 ms. Allocated memory is still 1.0 GB. Free memory is still 942.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 184.08 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 129.0 MB). Free memory was 942.6 MB in the beginning and 1.1 GB in the end (delta: -169.0 MB). Peak memory consumption was 15.7 MB. Max. memory is 11.5 GB. * TraceAbstraction took 620.14 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 55.7 MB). Peak memory consumption was 55.7 MB. Max. memory is 11.5 GB. * Witness Printer took 39.79 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 16]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L12] int a = 2; [L13] int b = 3; VAL [a=2, b=3] [L14] CALL, EXPR sum(a, b) VAL [\old(m)=3, \old(n)=2] [L4] COND FALSE !(n <= 0) VAL [\old(m)=3, \old(n)=2, m=3, n=2] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=4, \old(n)=1] [L4] COND FALSE !(n <= 0) VAL [\old(m)=4, \old(n)=1, m=4, n=1] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=5, \old(n)=0] [L4] COND TRUE n <= 0 [L5] return m + n; VAL [\old(m)=5, \old(n)=0, \result=5, m=5, n=0] [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=4, \old(n)=1, m=4, n=1, sum(n - 1, m + 1)=5] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=3, \old(n)=2, m=3, n=2, sum(n - 1, m + 1)=5] [L7] return sum(n - 1, m + 1); [L14] RET, EXPR sum(a, b) VAL [a=2, b=3, sum(a, b)=5] [L14] int result = sum(a, b); [L15] COND TRUE result == a + b VAL [a=2, b=3, result=5] [L16] __VERIFIER_error() VAL [a=2, b=3, result=5] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. UNSAFE Result, 0.5s OverallTime, 3 OverallIterations, 3 TraceHistogramMax, 0.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 27 SDtfs, 19 SDslu, 65 SDs, 0 SdLazy, 50 SolverSat, 1 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 33 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=21occurred in iteration=2, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 76 NumberOfCodeBlocks, 76 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 48 ConstructedInterpolants, 0 QuantifiedInterpolants, 1536 SizeOfPredicates, 3 NumberOfNonLiveVariables, 55 ConjunctsInSsa, 6 ConjunctsInUnsatCore, 3 InterpolantComputations, 1 PerfectInterpolantSequences, 4/8 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...