./Ultimate.py --spec /storage/repos/svcomp/c/properties/unreach-call.prp --file /storage/repos/svcomp/c/recursive-simple/sum_2x3_false-unreach-call_true-termination.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2e94e6aa Calling Ultimate with: java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx12G -Xms1G -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/svcomp/c/recursive-simple/sum_2x3_false-unreach-call_true-termination.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__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 0.1.24-2e94e6a [2018-12-31 10:05:12,172 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-31 10:05:12,174 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-31 10:05:12,192 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-31 10:05:12,192 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-31 10:05:12,194 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-31 10:05:12,196 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-31 10:05:12,198 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-31 10:05:12,201 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-31 10:05:12,201 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-31 10:05:12,204 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-31 10:05:12,204 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-31 10:05:12,206 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-31 10:05:12,207 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-31 10:05:12,209 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-31 10:05:12,210 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-31 10:05:12,211 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-31 10:05:12,221 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-31 10:05:12,223 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-31 10:05:12,225 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-31 10:05:12,229 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-31 10:05:12,231 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-31 10:05:12,236 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-12-31 10:05:12,236 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-31 10:05:12,236 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-31 10:05:12,237 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-31 10:05:12,240 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-31 10:05:12,240 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-31 10:05:12,244 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-31 10:05:12,245 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-31 10:05:12,245 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-31 10:05:12,245 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-31 10:05:12,247 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-31 10:05:12,247 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-31 10:05:12,248 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-31 10:05:12,249 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-31 10:05:12,250 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2018-12-31 10:05:12,277 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-31 10:05:12,277 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-31 10:05:12,282 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-12-31 10:05:12,282 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-12-31 10:05:12,282 INFO L133 SettingsManager]: * Use SBE=true [2018-12-31 10:05:12,283 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-31 10:05:12,283 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-31 10:05:12,283 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-31 10:05:12,283 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-31 10:05:12,283 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-31 10:05:12,283 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-12-31 10:05:12,284 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-31 10:05:12,284 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-12-31 10:05:12,284 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-31 10:05:12,284 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-31 10:05:12,284 INFO L133 SettingsManager]: * Use constant arrays=true [2018-12-31 10:05:12,284 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-12-31 10:05:12,285 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-31 10:05:12,285 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-31 10:05:12,285 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-12-31 10:05:12,285 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-31 10:05:12,285 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-31 10:05:12,285 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-31 10:05:12,286 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-31 10:05:12,286 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-12-31 10:05:12,286 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-12-31 10:05:12,286 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-31 10:05:12,286 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-12-31 10:05:12,286 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 -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(__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 [2018-12-31 10:05:12,323 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-31 10:05:12,349 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-31 10:05:12,354 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-31 10:05:12,356 INFO L271 PluginConnector]: Initializing CDTParser... [2018-12-31 10:05:12,357 INFO L276 PluginConnector]: CDTParser initialized [2018-12-31 10:05:12,358 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/svcomp/c/recursive-simple/sum_2x3_false-unreach-call_true-termination.c [2018-12-31 10:05:12,428 INFO L221 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/263daaeaa/48c4625f410c47fa904a6e4a8d53cf5e/FLAG82407c817 [2018-12-31 10:05:12,907 INFO L307 CDTParser]: Found 1 translation units. [2018-12-31 10:05:12,908 INFO L161 CDTParser]: Scanning /storage/repos/svcomp/c/recursive-simple/sum_2x3_false-unreach-call_true-termination.c [2018-12-31 10:05:12,915 INFO L355 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/263daaeaa/48c4625f410c47fa904a6e4a8d53cf5e/FLAG82407c817 [2018-12-31 10:05:13,268 INFO L363 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/263daaeaa/48c4625f410c47fa904a6e4a8d53cf5e [2018-12-31 10:05:13,272 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-31 10:05:13,273 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-12-31 10:05:13,274 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-12-31 10:05:13,275 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-12-31 10:05:13,278 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-12-31 10:05:13,279 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.12 10:05:13" (1/1) ... [2018-12-31 10:05:13,284 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@74d7ed7b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 10:05:13, skipping insertion in model container [2018-12-31 10:05:13,284 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.12 10:05:13" (1/1) ... [2018-12-31 10:05:13,294 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-12-31 10:05:13,314 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-12-31 10:05:13,548 INFO L204 PostProcessor]: Analyzing one entry point: main [2018-12-31 10:05:13,554 INFO L191 MainTranslator]: Completed pre-run [2018-12-31 10:05:13,577 INFO L204 PostProcessor]: Analyzing one entry point: main [2018-12-31 10:05:13,595 INFO L195 MainTranslator]: Completed translation [2018-12-31 10:05:13,596 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 10:05:13 WrapperNode [2018-12-31 10:05:13,596 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-12-31 10:05:13,598 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-31 10:05:13,598 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-31 10:05:13,598 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-31 10:05:13,610 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 10:05:13" (1/1) ... [2018-12-31 10:05:13,616 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 10:05:13" (1/1) ... [2018-12-31 10:05:13,641 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-31 10:05:13,642 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-31 10:05:13,642 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-31 10:05:13,642 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-31 10:05:13,654 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 10:05:13" (1/1) ... [2018-12-31 10:05:13,654 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 10:05:13" (1/1) ... [2018-12-31 10:05:13,655 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 10:05:13" (1/1) ... [2018-12-31 10:05:13,656 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 10:05:13" (1/1) ... [2018-12-31 10:05:13,659 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 10:05:13" (1/1) ... [2018-12-31 10:05:13,662 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 10:05:13" (1/1) ... [2018-12-31 10:05:13,664 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 10:05:13" (1/1) ... [2018-12-31 10:05:13,666 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-31 10:05:13,667 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-31 10:05:13,668 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-31 10:05:13,668 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-31 10:05:13,669 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 10:05:13" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2018-12-31 10:05:13,811 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-31 10:05:13,812 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-31 10:05:13,812 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2018-12-31 10:05:13,812 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2018-12-31 10:05:14,010 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-31 10:05:14,010 INFO L280 CfgBuilder]: Removed 4 assue(true) statements. [2018-12-31 10:05:14,011 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.12 10:05:14 BoogieIcfgContainer [2018-12-31 10:05:14,011 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-31 10:05:14,012 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-31 10:05:14,012 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-31 10:05:14,015 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-31 10:05:14,015 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.12 10:05:13" (1/3) ... [2018-12-31 10:05:14,016 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@602b4977 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.12 10:05:14, skipping insertion in model container [2018-12-31 10:05:14,016 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 10:05:13" (2/3) ... [2018-12-31 10:05:14,017 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@602b4977 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.12 10:05:14, skipping insertion in model container [2018-12-31 10:05:14,017 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.12 10:05:14" (3/3) ... [2018-12-31 10:05:14,019 INFO L112 eAbstractionObserver]: Analyzing ICFG sum_2x3_false-unreach-call_true-termination.c [2018-12-31 10:05:14,028 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-31 10:05:14,034 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-12-31 10:05:14,048 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-12-31 10:05:14,087 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-12-31 10:05:14,088 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-31 10:05:14,088 INFO L383 AbstractCegarLoop]: Hoare is true [2018-12-31 10:05:14,089 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-31 10:05:14,089 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-31 10:05:14,089 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-31 10:05:14,089 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-31 10:05:14,089 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-31 10:05:14,090 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-31 10:05:14,112 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states. [2018-12-31 10:05:14,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-12-31 10:05:14,118 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 10:05:14,119 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-31 10:05:14,122 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 10:05:14,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 10:05:14,128 INFO L82 PathProgramCache]: Analyzing trace with hash 389977641, now seen corresponding path program 1 times [2018-12-31 10:05:14,131 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 10:05:14,132 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 10:05:14,190 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:05:14,190 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 10:05:14,191 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:05:14,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 10:05:14,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 10:05:14,486 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-31 10:05:14,486 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-12-31 10:05:14,492 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-31 10:05:14,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-31 10:05:14,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-31 10:05:14,512 INFO L87 Difference]: Start difference. First operand 15 states. Second operand 5 states. [2018-12-31 10:05:14,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 10:05:14,669 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2018-12-31 10:05:14,670 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-31 10:05:14,672 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2018-12-31 10:05:14,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 10:05:14,681 INFO L225 Difference]: With dead ends: 24 [2018-12-31 10:05:14,681 INFO L226 Difference]: Without dead ends: 14 [2018-12-31 10:05:14,684 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-12-31 10:05:14,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-12-31 10:05:14,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-12-31 10:05:14,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-12-31 10:05:14,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2018-12-31 10:05:14,724 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 9 [2018-12-31 10:05:14,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 10:05:14,726 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2018-12-31 10:05:14,726 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-31 10:05:14,726 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2018-12-31 10:05:14,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-12-31 10:05:14,729 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 10:05:14,729 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-31 10:05:14,730 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 10:05:14,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 10:05:14,730 INFO L82 PathProgramCache]: Analyzing trace with hash -881029229, now seen corresponding path program 1 times [2018-12-31 10:05:14,731 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 10:05:14,731 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 10:05:14,732 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:05:14,733 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 10:05:14,733 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:05:14,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 10:05:14,840 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-12-31 10:05:14,841 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 10:05:14,841 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2018-12-31 10:05:14,854 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 10:05:14,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 10:05:14,895 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 10:05:14,936 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-12-31 10:05:14,957 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 10:05:14,957 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-12-31 10:05:14,958 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-31 10:05:14,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-31 10:05:14,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-12-31 10:05:14,959 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 6 states. [2018-12-31 10:05:15,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 10:05:15,278 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2018-12-31 10:05:15,279 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-31 10:05:15,279 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2018-12-31 10:05:15,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 10:05:15,280 INFO L225 Difference]: With dead ends: 21 [2018-12-31 10:05:15,280 INFO L226 Difference]: Without dead ends: 17 [2018-12-31 10:05:15,282 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-12-31 10:05:15,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-12-31 10:05:15,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-12-31 10:05:15,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-12-31 10:05:15,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-12-31 10:05:15,288 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 15 [2018-12-31 10:05:15,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 10:05:15,288 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2018-12-31 10:05:15,289 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-31 10:05:15,289 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2018-12-31 10:05:15,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-12-31 10:05:15,290 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 10:05:15,290 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2018-12-31 10:05:15,290 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 10:05:15,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 10:05:15,291 INFO L82 PathProgramCache]: Analyzing trace with hash -1824240471, now seen corresponding path program 2 times [2018-12-31 10:05:15,291 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 10:05:15,291 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 10:05:15,292 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:05:15,292 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 10:05:15,292 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:05:15,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-31 10:05:15,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-31 10:05:15,377 INFO L469 BasicCegarLoop]: Counterexample might be feasible [2018-12-31 10:05:15,405 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.12 10:05:15 BoogieIcfgContainer [2018-12-31 10:05:15,405 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-12-31 10:05:15,405 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-12-31 10:05:15,406 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-12-31 10:05:15,406 INFO L276 PluginConnector]: Witness Printer initialized [2018-12-31 10:05:15,406 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.12 10:05:14" (3/4) ... [2018-12-31 10:05:15,414 INFO L138 WitnessPrinter]: Generating witness for reachability counterexample [2018-12-31 10:05:15,466 INFO L145 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2018-12-31 10:05:15,466 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-12-31 10:05:15,468 INFO L168 Benchmark]: Toolchain (without parser) took 2195.02 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 113.8 MB). Free memory was 948.7 MB in the beginning and 1.0 GB in the end (delta: -89.5 MB). Peak memory consumption was 24.3 MB. Max. memory is 11.5 GB. [2018-12-31 10:05:15,470 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 978.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-31 10:05:15,470 INFO L168 Benchmark]: CACSL2BoogieTranslator took 322.32 ms. Allocated memory is still 1.0 GB. Free memory was 948.7 MB in the beginning and 937.9 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-12-31 10:05:15,472 INFO L168 Benchmark]: Boogie Procedure Inliner took 43.93 ms. Allocated memory is still 1.0 GB. Free memory is still 937.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-31 10:05:15,473 INFO L168 Benchmark]: Boogie Preprocessor took 24.46 ms. Allocated memory is still 1.0 GB. Free memory is still 937.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-31 10:05:15,473 INFO L168 Benchmark]: RCFGBuilder took 344.52 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 113.8 MB). Free memory was 937.9 MB in the beginning and 1.1 GB in the end (delta: -155.0 MB). Peak memory consumption was 24.7 MB. Max. memory is 11.5 GB. [2018-12-31 10:05:15,477 INFO L168 Benchmark]: TraceAbstraction took 1393.14 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 47.9 MB). Peak memory consumption was 47.9 MB. Max. memory is 11.5 GB. [2018-12-31 10:05:15,478 INFO L168 Benchmark]: Witness Printer took 61.32 ms. Allocated memory is still 1.1 GB. Free memory is still 1.0 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-31 10:05:15,487 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 978.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 322.32 ms. Allocated memory is still 1.0 GB. Free memory was 948.7 MB in the beginning and 937.9 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 43.93 ms. Allocated memory is still 1.0 GB. Free memory is still 937.9 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 24.46 ms. Allocated memory is still 1.0 GB. Free memory is still 937.9 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 344.52 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 113.8 MB). Free memory was 937.9 MB in the beginning and 1.1 GB in the end (delta: -155.0 MB). Peak memory consumption was 24.7 MB. Max. memory is 11.5 GB. * TraceAbstraction took 1393.14 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 47.9 MB). Peak memory consumption was 47.9 MB. Max. memory is 11.5 GB. * Witness Printer took 61.32 ms. Allocated memory is still 1.1 GB. Free memory is still 1.0 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; [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) [L14] int result = sum(a, b); [L15] COND TRUE result == a + b [L16] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 15 locations, 1 error locations. UNSAFE Result, 1.3s OverallTime, 3 OverallIterations, 3 TraceHistogramMax, 0.5s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 18 SDtfs, 20 SDslu, 33 SDs, 0 SdLazy, 50 SolverSat, 1 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=17occurred in iteration=2, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s 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, 0.3s InterpolantComputationTime, 60 NumberOfCodeBlocks, 60 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 36 ConstructedInterpolants, 0 QuantifiedInterpolants, 1024 SizeOfPredicates, 3 NumberOfNonLiveVariables, 47 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...