./Ultimate.py --spec ../../sv-benchmarks/c/ReachSafety.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 1dbac8bc Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_b24338a8-8811-43ed-a2cc-8b0faa0cd350/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_b24338a8-8811-43ed-a2cc-8b0faa0cd350/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_b24338a8-8811-43ed-a2cc-8b0faa0cd350/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_b24338a8-8811-43ed-a2cc-8b0faa0cd350/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_b24338a8-8811-43ed-a2cc-8b0faa0cd350/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_b24338a8-8811-43ed-a2cc-8b0faa0cd350/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 0.1.23-1dbac8b [2018-11-10 04:33:29,374 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-10 04:33:29,375 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-10 04:33:29,383 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-10 04:33:29,383 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-10 04:33:29,384 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-10 04:33:29,384 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-10 04:33:29,385 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-10 04:33:29,386 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-10 04:33:29,387 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-10 04:33:29,388 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-10 04:33:29,388 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-10 04:33:29,388 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-10 04:33:29,389 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-10 04:33:29,390 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-10 04:33:29,390 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-10 04:33:29,391 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-10 04:33:29,392 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-10 04:33:29,393 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-10 04:33:29,394 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-10 04:33:29,395 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-10 04:33:29,396 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-10 04:33:29,397 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-10 04:33:29,397 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-10 04:33:29,398 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-10 04:33:29,398 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-10 04:33:29,399 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-10 04:33:29,399 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-10 04:33:29,400 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-10 04:33:29,401 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-10 04:33:29,401 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-10 04:33:29,401 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-10 04:33:29,402 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-10 04:33:29,402 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-10 04:33:29,402 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-10 04:33:29,403 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-10 04:33:29,403 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_b24338a8-8811-43ed-a2cc-8b0faa0cd350/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2018-11-10 04:33:29,412 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-10 04:33:29,413 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-10 04:33:29,413 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-10 04:33:29,413 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-11-10 04:33:29,414 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-10 04:33:29,414 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-10 04:33:29,414 INFO L133 SettingsManager]: * Use SBE=true [2018-11-10 04:33:29,414 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-10 04:33:29,414 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-10 04:33:29,414 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-10 04:33:29,414 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-10 04:33:29,415 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-10 04:33:29,415 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-10 04:33:29,415 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-10 04:33:29,415 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-10 04:33:29,415 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-10 04:33:29,415 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-10 04:33:29,415 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-10 04:33:29,415 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-10 04:33:29,415 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-10 04:33:29,415 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-10 04:33:29,416 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-10 04:33:29,416 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-10 04:33:29,416 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-10 04:33:29,416 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-10 04:33:29,416 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-10 04:33:29,416 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-11-10 04:33:29,416 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-10 04:33:29,416 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-10 04:33:29,416 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_b24338a8-8811-43ed-a2cc-8b0faa0cd350/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 [2018-11-10 04:33:29,438 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-10 04:33:29,445 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-10 04:33:29,447 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-10 04:33:29,448 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-10 04:33:29,448 INFO L276 PluginConnector]: CDTParser initialized [2018-11-10 04:33:29,448 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_b24338a8-8811-43ed-a2cc-8b0faa0cd350/bin-2019/uautomizer/../../sv-benchmarks/c/recursive-simple/sum_2x3_false-unreach-call_true-termination.c [2018-11-10 04:33:29,490 INFO L218 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_b24338a8-8811-43ed-a2cc-8b0faa0cd350/bin-2019/uautomizer/data/300567db5/b941f092bee7468f9a58c0830ac7c5a5/FLAG5d3193dfd [2018-11-10 04:33:29,867 INFO L298 CDTParser]: Found 1 translation units. [2018-11-10 04:33:29,867 INFO L158 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_b24338a8-8811-43ed-a2cc-8b0faa0cd350/sv-benchmarks/c/recursive-simple/sum_2x3_false-unreach-call_true-termination.c [2018-11-10 04:33:29,871 INFO L346 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_b24338a8-8811-43ed-a2cc-8b0faa0cd350/bin-2019/uautomizer/data/300567db5/b941f092bee7468f9a58c0830ac7c5a5/FLAG5d3193dfd [2018-11-10 04:33:29,879 INFO L354 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_b24338a8-8811-43ed-a2cc-8b0faa0cd350/bin-2019/uautomizer/data/300567db5/b941f092bee7468f9a58c0830ac7c5a5 [2018-11-10 04:33:29,881 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-10 04:33:29,882 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-10 04:33:29,883 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-10 04:33:29,883 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-10 04:33:29,886 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-10 04:33:29,887 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 04:33:29" (1/1) ... [2018-11-10 04:33:29,888 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f62aa95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 04:33:29, skipping insertion in model container [2018-11-10 04:33:29,889 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 04:33:29" (1/1) ... [2018-11-10 04:33:29,894 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-10 04:33:29,904 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-10 04:33:29,992 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-10 04:33:29,994 INFO L189 MainTranslator]: Completed pre-run [2018-11-10 04:33:30,002 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-10 04:33:30,010 INFO L193 MainTranslator]: Completed translation [2018-11-10 04:33:30,010 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 04:33:30 WrapperNode [2018-11-10 04:33:30,011 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-10 04:33:30,011 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-10 04:33:30,011 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-10 04:33:30,011 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-10 04:33:30,018 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 04:33:30" (1/1) ... [2018-11-10 04:33:30,018 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 04:33:30" (1/1) ... [2018-11-10 04:33:30,021 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 04:33:30" (1/1) ... [2018-11-10 04:33:30,022 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 04:33:30" (1/1) ... [2018-11-10 04:33:30,023 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 04:33:30" (1/1) ... [2018-11-10 04:33:30,024 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 04:33:30" (1/1) ... [2018-11-10 04:33:30,025 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 04:33:30" (1/1) ... [2018-11-10 04:33:30,026 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-10 04:33:30,026 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-10 04:33:30,026 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-10 04:33:30,026 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-10 04:33:30,027 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 04:33:30" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b24338a8-8811-43ed-a2cc-8b0faa0cd350/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 [2018-11-10 04:33:30,099 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-10 04:33:30,099 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-10 04:33:30,099 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2018-11-10 04:33:30,099 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-10 04:33:30,099 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2018-11-10 04:33:30,099 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2018-11-10 04:33:30,100 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-10 04:33:30,100 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-10 04:33:30,100 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-10 04:33:30,198 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-10 04:33:30,198 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.11 04:33:30 BoogieIcfgContainer [2018-11-10 04:33:30,198 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-10 04:33:30,199 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-10 04:33:30,199 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-10 04:33:30,202 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-10 04:33:30,202 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.11 04:33:29" (1/3) ... [2018-11-10 04:33:30,202 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@134ad58a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 04:33:30, skipping insertion in model container [2018-11-10 04:33:30,203 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 04:33:30" (2/3) ... [2018-11-10 04:33:30,203 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@134ad58a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 04:33:30, skipping insertion in model container [2018-11-10 04:33:30,203 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.11 04:33:30" (3/3) ... [2018-11-10 04:33:30,204 INFO L112 eAbstractionObserver]: Analyzing ICFG sum_2x3_false-unreach-call_true-termination.c [2018-11-10 04:33:30,213 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-10 04:33:30,218 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-10 04:33:30,231 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-10 04:33:30,256 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-11-10 04:33:30,257 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-10 04:33:30,257 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-10 04:33:30,257 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-10 04:33:30,257 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-10 04:33:30,257 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-10 04:33:30,257 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-10 04:33:30,257 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-10 04:33:30,258 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-10 04:33:30,272 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2018-11-10 04:33:30,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-11-10 04:33:30,277 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 04:33:30,277 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 04:33:30,279 INFO L424 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 04:33:30,283 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 04:33:30,284 INFO L82 PathProgramCache]: Analyzing trace with hash 2001781660, now seen corresponding path program 1 times [2018-11-10 04:33:30,285 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 04:33:30,286 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 04:33:30,327 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 04:33:30,327 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 04:33:30,328 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 04:33:30,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 04:33:30,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 04:33:30,432 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 04:33:30,433 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-10 04:33:30,435 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-10 04:33:30,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-10 04:33:30,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-10 04:33:30,447 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2018-11-10 04:33:30,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 04:33:30,514 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2018-11-10 04:33:30,514 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-10 04:33:30,515 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2018-11-10 04:33:30,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 04:33:30,521 INFO L225 Difference]: With dead ends: 30 [2018-11-10 04:33:30,521 INFO L226 Difference]: Without dead ends: 18 [2018-11-10 04:33:30,523 INFO L605 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 [2018-11-10 04:33:30,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-11-10 04:33:30,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-11-10 04:33:30,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-11-10 04:33:30,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2018-11-10 04:33:30,549 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2018-11-10 04:33:30,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 04:33:30,549 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2018-11-10 04:33:30,549 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-10 04:33:30,549 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2018-11-10 04:33:30,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-11-10 04:33:30,550 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 04:33:30,551 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 04:33:30,551 INFO L424 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 04:33:30,551 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 04:33:30,551 INFO L82 PathProgramCache]: Analyzing trace with hash -118151420, now seen corresponding path program 1 times [2018-11-10 04:33:30,551 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 04:33:30,551 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 04:33:30,552 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 04:33:30,552 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 04:33:30,552 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 04:33:30,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 04:33:30,608 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-10 04:33:30,611 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 04:33:30,611 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b24338a8-8811-43ed-a2cc-8b0faa0cd350/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 [2018-11-10 04:33:30,618 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 04:33:30,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 04:33:30,639 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 04:33:30,661 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-10 04:33:30,688 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 04:33:30,688 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-11-10 04:33:30,689 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-10 04:33:30,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-10 04:33:30,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-11-10 04:33:30,689 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 6 states. [2018-11-10 04:33:30,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 04:33:30,769 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2018-11-10 04:33:30,769 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-10 04:33:30,769 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2018-11-10 04:33:30,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 04:33:30,770 INFO L225 Difference]: With dead ends: 25 [2018-11-10 04:33:30,770 INFO L226 Difference]: Without dead ends: 21 [2018-11-10 04:33:30,771 INFO L605 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 [2018-11-10 04:33:30,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-11-10 04:33:30,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-11-10 04:33:30,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-11-10 04:33:30,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-11-10 04:33:30,774 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2018-11-10 04:33:30,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 04:33:30,774 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2018-11-10 04:33:30,774 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-10 04:33:30,774 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2018-11-10 04:33:30,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-11-10 04:33:30,775 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 04:33:30,775 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 04:33:30,775 INFO L424 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 04:33:30,775 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 04:33:30,775 INFO L82 PathProgramCache]: Analyzing trace with hash 764931548, now seen corresponding path program 2 times [2018-11-10 04:33:30,775 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 04:33:30,776 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 04:33:30,776 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 04:33:30,776 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 04:33:30,776 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 04:33:30,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-10 04:33:30,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-10 04:33:30,811 INFO L442 BasicCegarLoop]: Counterexample might be feasible [2018-11-10 04:33:30,834 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.11 04:33:30 BoogieIcfgContainer [2018-11-10 04:33:30,835 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-10 04:33:30,835 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-10 04:33:30,835 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-10 04:33:30,835 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-10 04:33:30,836 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.11 04:33:30" (3/4) ... [2018-11-10 04:33:30,838 INFO L138 WitnessPrinter]: Generating witness for reachability counterexample [2018-11-10 04:33:30,869 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_b24338a8-8811-43ed-a2cc-8b0faa0cd350/bin-2019/uautomizer/witness.graphml [2018-11-10 04:33:30,869 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-10 04:33:30,870 INFO L168 Benchmark]: Toolchain (without parser) took 988.50 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 126.9 MB). Free memory was 959.2 MB in the beginning and 1.1 GB in the end (delta: -96.3 MB). Peak memory consumption was 30.6 MB. Max. memory is 11.5 GB. [2018-11-10 04:33:30,871 INFO L168 Benchmark]: CDTParser took 0.10 ms. Allocated memory is still 1.0 GB. Free memory is still 985.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-10 04:33:30,871 INFO L168 Benchmark]: CACSL2BoogieTranslator took 128.03 ms. Allocated memory is still 1.0 GB. Free memory was 959.2 MB in the beginning and 947.3 MB in the end (delta: 11.9 MB). Peak memory consumption was 11.9 MB. Max. memory is 11.5 GB. [2018-11-10 04:33:30,872 INFO L168 Benchmark]: Boogie Preprocessor took 15.16 ms. Allocated memory is still 1.0 GB. Free memory is still 947.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-10 04:33:30,872 INFO L168 Benchmark]: RCFGBuilder took 172.06 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 126.9 MB). Free memory was 947.3 MB in the beginning and 1.1 GB in the end (delta: -170.1 MB). Peak memory consumption was 22.3 MB. Max. memory is 11.5 GB. [2018-11-10 04:33:30,872 INFO L168 Benchmark]: TraceAbstraction took 635.76 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: 59.2 MB). Peak memory consumption was 59.2 MB. Max. memory is 11.5 GB. [2018-11-10 04:33:30,872 INFO L168 Benchmark]: Witness Printer took 34.67 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: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2018-11-10 04:33:30,874 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 985.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 128.03 ms. Allocated memory is still 1.0 GB. Free memory was 959.2 MB in the beginning and 947.3 MB in the end (delta: 11.9 MB). Peak memory consumption was 11.9 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 15.16 ms. Allocated memory is still 1.0 GB. Free memory is still 947.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 172.06 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 126.9 MB). Free memory was 947.3 MB in the beginning and 1.1 GB in the end (delta: -170.1 MB). Peak memory consumption was 22.3 MB. Max. memory is 11.5 GB. * TraceAbstraction took 635.76 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: 59.2 MB). Peak memory consumption was 59.2 MB. Max. memory is 11.5 GB. * Witness Printer took 34.67 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: 2.7 MB). Peak memory consumption was 2.7 MB. 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] RET return m + n; VAL [\old(m)=5, \old(n)=0, \result=5, m=5, n=0] [L7] EXPR sum(n - 1, m + 1) VAL [\old(m)=4, \old(n)=1, m=4, n=1, sum(n - 1, m + 1)=5] [L7] RET return sum(n - 1, m + 1); [L7] EXPR sum(n - 1, m + 1) VAL [\old(m)=3, \old(n)=2, m=3, n=2, sum(n - 1, m + 1)=5] [L7] RET return sum(n - 1, m + 1); [L14] 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...