./Ultimate.py --spec /storage/repos/svcomp/c/properties/unreach-call.prp --file /storage/repos/svcomp/c/recursive-simple/fibo_2calls_2_false-unreach-call_true-termination.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 91b1670e 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/fibo_2calls_2_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 0d7907681604b1ce9d21af31806cc60e045b313d ............................................................................................................................................................................................................................................................................................................................................................................... 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 0.1.24-91b1670 [2018-11-28 18:50:43,236 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-28 18:50:43,238 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-28 18:50:43,256 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-28 18:50:43,257 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-28 18:50:43,258 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-28 18:50:43,260 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-28 18:50:43,263 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-28 18:50:43,266 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-28 18:50:43,267 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-28 18:50:43,268 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-28 18:50:43,269 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-28 18:50:43,270 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-28 18:50:43,276 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-28 18:50:43,277 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-28 18:50:43,278 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-28 18:50:43,279 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-28 18:50:43,282 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-28 18:50:43,287 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-28 18:50:43,291 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-28 18:50:43,292 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-28 18:50:43,297 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-28 18:50:43,302 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-28 18:50:43,303 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-28 18:50:43,304 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-28 18:50:43,305 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-28 18:50:43,306 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-28 18:50:43,309 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-28 18:50:43,310 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-28 18:50:43,311 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-28 18:50:43,311 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-28 18:50:43,312 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-28 18:50:43,312 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-28 18:50:43,312 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-28 18:50:43,313 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-28 18:50:43,314 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-28 18:50:43,314 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2018-11-28 18:50:43,329 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-28 18:50:43,329 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-28 18:50:43,330 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-28 18:50:43,330 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-11-28 18:50:43,331 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-28 18:50:43,331 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-28 18:50:43,331 INFO L133 SettingsManager]: * Use SBE=true [2018-11-28 18:50:43,331 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-28 18:50:43,332 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-28 18:50:43,332 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-28 18:50:43,332 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-28 18:50:43,332 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-28 18:50:43,332 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-28 18:50:43,332 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-28 18:50:43,333 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-28 18:50:43,333 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-28 18:50:43,333 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-28 18:50:43,333 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-28 18:50:43,333 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-28 18:50:43,333 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-28 18:50:43,334 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-28 18:50:43,334 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-28 18:50:43,334 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-28 18:50:43,334 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-28 18:50:43,334 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-28 18:50:43,334 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-28 18:50:43,335 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-28 18:50:43,335 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-11-28 18:50:43,335 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-28 18:50:43,335 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-28 18:50:43,335 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 -> 0d7907681604b1ce9d21af31806cc60e045b313d [2018-11-28 18:50:43,382 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-28 18:50:43,399 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-28 18:50:43,407 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-28 18:50:43,409 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-28 18:50:43,409 INFO L276 PluginConnector]: CDTParser initialized [2018-11-28 18:50:43,411 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/svcomp/c/recursive-simple/fibo_2calls_2_false-unreach-call_true-termination.c [2018-11-28 18:50:43,482 INFO L221 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bb3b957ac/71236f16b50146ed9c5327a045087ee3/FLAG97520f580 [2018-11-28 18:50:43,976 INFO L307 CDTParser]: Found 1 translation units. [2018-11-28 18:50:43,977 INFO L161 CDTParser]: Scanning /storage/repos/svcomp/c/recursive-simple/fibo_2calls_2_false-unreach-call_true-termination.c [2018-11-28 18:50:43,985 INFO L355 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bb3b957ac/71236f16b50146ed9c5327a045087ee3/FLAG97520f580 [2018-11-28 18:50:44,349 INFO L363 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bb3b957ac/71236f16b50146ed9c5327a045087ee3 [2018-11-28 18:50:44,352 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-28 18:50:44,354 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-28 18:50:44,355 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-28 18:50:44,355 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-28 18:50:44,359 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-28 18:50:44,360 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 06:50:44" (1/1) ... [2018-11-28 18:50:44,363 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@54b2a4b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:50:44, skipping insertion in model container [2018-11-28 18:50:44,363 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 06:50:44" (1/1) ... [2018-11-28 18:50:44,371 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-28 18:50:44,389 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-28 18:50:44,616 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-11-28 18:50:44,623 INFO L191 MainTranslator]: Completed pre-run [2018-11-28 18:50:44,652 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-11-28 18:50:44,670 INFO L195 MainTranslator]: Completed translation [2018-11-28 18:50:44,670 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:50:44 WrapperNode [2018-11-28 18:50:44,670 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-28 18:50:44,671 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-28 18:50:44,671 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-28 18:50:44,672 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-28 18:50:44,682 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:50:44" (1/1) ... [2018-11-28 18:50:44,688 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:50:44" (1/1) ... [2018-11-28 18:50:44,696 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-28 18:50:44,697 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-28 18:50:44,697 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-28 18:50:44,697 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-28 18:50:44,708 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:50:44" (1/1) ... [2018-11-28 18:50:44,708 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:50:44" (1/1) ... [2018-11-28 18:50:44,709 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:50:44" (1/1) ... [2018-11-28 18:50:44,711 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:50:44" (1/1) ... [2018-11-28 18:50:44,718 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:50:44" (1/1) ... [2018-11-28 18:50:44,722 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:50:44" (1/1) ... [2018-11-28 18:50:44,723 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:50:44" (1/1) ... [2018-11-28 18:50:44,725 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-28 18:50:44,725 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-28 18:50:44,725 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-28 18:50:44,725 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-28 18:50:44,732 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:50:44" (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 [2018-11-28 18:50:44,888 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-28 18:50:44,888 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-28 18:50:44,889 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-28 18:50:44,889 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-28 18:50:44,889 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-28 18:50:44,889 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-28 18:50:44,889 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2018-11-28 18:50:44,889 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2018-11-28 18:50:44,889 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2018-11-28 18:50:44,891 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2018-11-28 18:50:45,231 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-28 18:50:45,231 INFO L280 CfgBuilder]: Removed 0 assue(true) statements. [2018-11-28 18:50:45,231 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 06:50:45 BoogieIcfgContainer [2018-11-28 18:50:45,232 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-28 18:50:45,232 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-28 18:50:45,233 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-28 18:50:45,237 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-28 18:50:45,237 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 06:50:44" (1/3) ... [2018-11-28 18:50:45,239 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@209fc92 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 06:50:45, skipping insertion in model container [2018-11-28 18:50:45,239 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 06:50:44" (2/3) ... [2018-11-28 18:50:45,240 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@209fc92 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 06:50:45, skipping insertion in model container [2018-11-28 18:50:45,240 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 06:50:45" (3/3) ... [2018-11-28 18:50:45,242 INFO L112 eAbstractionObserver]: Analyzing ICFG fibo_2calls_2_false-unreach-call_true-termination.c [2018-11-28 18:50:45,253 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-28 18:50:45,261 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-28 18:50:45,280 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-28 18:50:45,313 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-11-28 18:50:45,314 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-28 18:50:45,314 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-28 18:50:45,314 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-28 18:50:45,315 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-28 18:50:45,315 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-28 18:50:45,315 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-28 18:50:45,315 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-28 18:50:45,315 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-28 18:50:45,336 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2018-11-28 18:50:45,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-11-28 18:50:45,343 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 18:50:45,345 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 18:50:45,348 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 18:50:45,354 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 18:50:45,355 INFO L82 PathProgramCache]: Analyzing trace with hash 1464461757, now seen corresponding path program 1 times [2018-11-28 18:50:45,357 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 18:50:45,358 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 18:50:45,403 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:50:45,403 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 18:50:45,404 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:50:45,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:50:45,576 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 18:50:45,578 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 18:50:45,578 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-28 18:50:45,583 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-28 18:50:45,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-28 18:50:45,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-28 18:50:45,600 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 5 states. [2018-11-28 18:50:45,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 18:50:45,829 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2018-11-28 18:50:45,830 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-28 18:50:45,831 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2018-11-28 18:50:45,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 18:50:45,842 INFO L225 Difference]: With dead ends: 44 [2018-11-28 18:50:45,843 INFO L226 Difference]: Without dead ends: 30 [2018-11-28 18:50:45,846 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-11-28 18:50:45,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-11-28 18:50:45,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-11-28 18:50:45,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-11-28 18:50:45,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2018-11-28 18:50:45,894 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 13 [2018-11-28 18:50:45,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 18:50:45,895 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2018-11-28 18:50:45,895 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-28 18:50:45,895 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2018-11-28 18:50:45,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-11-28 18:50:45,897 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 18:50:45,897 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 18:50:45,898 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 18:50:45,898 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 18:50:45,898 INFO L82 PathProgramCache]: Analyzing trace with hash -1134800479, now seen corresponding path program 1 times [2018-11-28 18:50:45,898 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 18:50:45,898 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 18:50:45,899 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:50:45,900 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 18:50:45,900 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:50:45,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:50:45,975 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 18:50:45,976 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 18:50:45,978 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-28 18:50:45,980 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-28 18:50:45,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-28 18:50:45,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-28 18:50:45,982 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 5 states. [2018-11-28 18:50:46,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 18:50:46,307 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2018-11-28 18:50:46,307 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-28 18:50:46,307 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2018-11-28 18:50:46,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 18:50:46,309 INFO L225 Difference]: With dead ends: 36 [2018-11-28 18:50:46,309 INFO L226 Difference]: Without dead ends: 32 [2018-11-28 18:50:46,310 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-11-28 18:50:46,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-11-28 18:50:46,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2018-11-28 18:50:46,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-11-28 18:50:46,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2018-11-28 18:50:46,319 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 14 [2018-11-28 18:50:46,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 18:50:46,319 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2018-11-28 18:50:46,320 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-28 18:50:46,320 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2018-11-28 18:50:46,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-11-28 18:50:46,321 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 18:50:46,321 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 18:50:46,322 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 18:50:46,322 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 18:50:46,322 INFO L82 PathProgramCache]: Analyzing trace with hash -1592795560, now seen corresponding path program 1 times [2018-11-28 18:50:46,322 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 18:50:46,322 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 18:50:46,323 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:50:46,323 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 18:50:46,324 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:50:46,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:50:46,474 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-11-28 18:50:46,474 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 18:50:46,475 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 [2018-11-28 18:50:46,496 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 18:50:46,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 18:50:46,530 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 18:50:46,590 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 18:50:46,611 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-28 18:50:46,611 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 6 [2018-11-28 18:50:46,612 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-28 18:50:46,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-28 18:50:46,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-11-28 18:50:46,612 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 6 states. [2018-11-28 18:50:46,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 18:50:46,821 INFO L93 Difference]: Finished difference Result 58 states and 78 transitions. [2018-11-28 18:50:46,823 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-28 18:50:46,823 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 26 [2018-11-28 18:50:46,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 18:50:46,826 INFO L225 Difference]: With dead ends: 58 [2018-11-28 18:50:46,826 INFO L226 Difference]: Without dead ends: 34 [2018-11-28 18:50:46,827 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2018-11-28 18:50:46,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-11-28 18:50:46,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2018-11-28 18:50:46,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-11-28 18:50:46,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2018-11-28 18:50:46,836 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 26 [2018-11-28 18:50:46,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 18:50:46,837 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2018-11-28 18:50:46,837 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-28 18:50:46,837 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2018-11-28 18:50:46,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-11-28 18:50:46,839 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 18:50:46,839 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 18:50:46,840 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 18:50:46,840 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 18:50:46,840 INFO L82 PathProgramCache]: Analyzing trace with hash 746633022, now seen corresponding path program 1 times [2018-11-28 18:50:46,840 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 18:50:46,841 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 18:50:46,842 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:50:46,842 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 18:50:46,842 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 18:50:46,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 18:50:46,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 18:50:46,888 INFO L469 BasicCegarLoop]: Counterexample might be feasible [2018-11-28 18:50:46,922 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 06:50:46 BoogieIcfgContainer [2018-11-28 18:50:46,922 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-28 18:50:46,922 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-28 18:50:46,923 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-28 18:50:46,923 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-28 18:50:46,924 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 06:50:45" (3/4) ... [2018-11-28 18:50:46,927 INFO L138 WitnessPrinter]: Generating witness for reachability counterexample [2018-11-28 18:50:46,980 INFO L145 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2018-11-28 18:50:46,981 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-28 18:50:46,982 INFO L168 Benchmark]: Toolchain (without parser) took 2628.73 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 144.7 MB). Free memory was 943.3 MB in the beginning and 1.0 GB in the end (delta: -101.4 MB). Peak memory consumption was 43.3 MB. Max. memory is 11.5 GB. [2018-11-28 18:50:46,984 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 1.0 GB. Free memory is still 972.8 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-28 18:50:46,984 INFO L168 Benchmark]: CACSL2BoogieTranslator took 315.78 ms. Allocated memory is still 1.0 GB. Free memory was 943.3 MB in the beginning and 932.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-11-28 18:50:46,985 INFO L168 Benchmark]: Boogie Procedure Inliner took 24.91 ms. Allocated memory is still 1.0 GB. Free memory is still 932.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-28 18:50:46,985 INFO L168 Benchmark]: Boogie Preprocessor took 28.25 ms. Allocated memory is still 1.0 GB. Free memory is still 932.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-28 18:50:46,986 INFO L168 Benchmark]: RCFGBuilder took 506.59 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 144.7 MB). Free memory was 932.6 MB in the beginning and 1.1 GB in the end (delta: -185.2 MB). Peak memory consumption was 24.7 MB. Max. memory is 11.5 GB. [2018-11-28 18:50:46,987 INFO L168 Benchmark]: TraceAbstraction took 1689.54 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: 66.4 MB). Peak memory consumption was 66.4 MB. Max. memory is 11.5 GB. [2018-11-28 18:50:46,987 INFO L168 Benchmark]: Witness Printer took 58.47 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 6.7 MB). Peak memory consumption was 6.7 MB. Max. memory is 11.5 GB. [2018-11-28 18:50:46,992 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 1.0 GB. Free memory is still 972.8 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 315.78 ms. Allocated memory is still 1.0 GB. Free memory was 943.3 MB in the beginning and 932.6 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 24.91 ms. Allocated memory is still 1.0 GB. Free memory is still 932.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 28.25 ms. Allocated memory is still 1.0 GB. Free memory is still 932.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 506.59 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 144.7 MB). Free memory was 932.6 MB in the beginning and 1.1 GB in the end (delta: -185.2 MB). Peak memory consumption was 24.7 MB. Max. memory is 11.5 GB. * TraceAbstraction took 1689.54 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: 66.4 MB). Peak memory consumption was 66.4 MB. Max. memory is 11.5 GB. * Witness Printer took 58.47 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 6.7 MB). Peak memory consumption was 6.7 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 39]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L36] int x = 2; VAL [x=2] [L37] CALL, EXPR fibo1(x) VAL [\old(n)=2] [L8] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L10] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L13] CALL, EXPR fibo2(n-1) VAL [\old(n)=1] [L18] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L20] COND TRUE n == 1 [L21] return 1; VAL [\old(n)=1, \result=1, n=1] [L13] RET, EXPR fibo2(n-1) VAL [\old(n)=2, fibo2(n-1)=1, n=2] [L13] CALL, EXPR fibo2(n-2) VAL [\old(n)=0] [L18] COND TRUE n < 1 [L19] return 0; VAL [\old(n)=0, \result=0, n=0] [L13] RET, EXPR fibo2(n-2) VAL [\old(n)=2, fibo2(n-1)=1, fibo2(n-2)=0, n=2] [L13] return fibo2(n-1) + fibo2(n-2); [L37] RET, EXPR fibo1(x) VAL [fibo1(x)=1, x=2] [L37] int result = fibo1(x); [L38] COND TRUE result == 1 VAL [result=1, x=2] [L39] __VERIFIER_error() VAL [result=1, x=2] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 33 locations, 1 error locations. UNSAFE Result, 1.6s OverallTime, 4 OverallIterations, 2 TraceHistogramMax, 0.8s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 91 SDtfs, 40 SDslu, 205 SDs, 0 SdLazy, 99 SolverSat, 4 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 45 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=33occurred in iteration=0, 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, 3 MinimizatonAttempts, 4 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 106 NumberOfCodeBlocks, 106 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 75 ConstructedInterpolants, 0 QuantifiedInterpolants, 2289 SizeOfPredicates, 2 NumberOfNonLiveVariables, 60 ConjunctsInSsa, 5 ConjunctsInUnsatCore, 4 InterpolantComputations, 3 PerfectInterpolantSequences, 5/8 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...