./Ultimate.py --spec ../../sv-benchmarks/c/ReachSafety.prp --file ../../sv-benchmarks/c/recursive-simple/afterrec_2calls_true-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_9db7a53e-4aaa-4f35-8db3-446a91f6c1ea/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_9db7a53e-4aaa-4f35-8db3-446a91f6c1ea/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_9db7a53e-4aaa-4f35-8db3-446a91f6c1ea/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_9db7a53e-4aaa-4f35-8db3-446a91f6c1ea/bin-2019/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursive-simple/afterrec_2calls_true-unreach-call_true-termination.c -s /tmp/vcloud-vcloud-master/worker/working_dir_9db7a53e-4aaa-4f35-8db3-446a91f6c1ea/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_9db7a53e-4aaa-4f35-8db3-446a91f6c1ea/bin-2019/utaipan --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c6374d8695c81504f4ccfc7ac3dabef115b6d49d ............................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-1dbac8b [2018-10-26 22:41:30,473 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-26 22:41:30,475 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-26 22:41:30,486 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-26 22:41:30,486 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-26 22:41:30,487 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-26 22:41:30,490 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-26 22:41:30,492 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-26 22:41:30,493 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-26 22:41:30,494 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-26 22:41:30,495 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-26 22:41:30,495 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-26 22:41:30,496 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-26 22:41:30,498 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-26 22:41:30,499 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-26 22:41:30,500 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-26 22:41:30,501 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-26 22:41:30,503 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-26 22:41:30,505 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-26 22:41:30,507 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-26 22:41:30,508 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-26 22:41:30,509 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-26 22:41:30,511 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-26 22:41:30,511 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-26 22:41:30,512 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-26 22:41:30,513 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-26 22:41:30,514 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-26 22:41:30,515 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-26 22:41:30,516 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-26 22:41:30,517 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-26 22:41:30,518 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-26 22:41:30,518 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-10-26 22:41:30,518 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-26 22:41:30,519 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-26 22:41:30,520 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-26 22:41:30,521 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-26 22:41:30,522 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_9db7a53e-4aaa-4f35-8db3-446a91f6c1ea/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2018-10-26 22:41:30,545 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-26 22:41:30,545 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-26 22:41:30,546 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-26 22:41:30,546 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-26 22:41:30,547 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-26 22:41:30,547 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-26 22:41:30,547 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-26 22:41:30,547 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-26 22:41:30,547 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-26 22:41:30,547 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-26 22:41:30,548 INFO L133 SettingsManager]: * Interval Domain=false [2018-10-26 22:41:30,548 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-26 22:41:30,549 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-26 22:41:30,549 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-26 22:41:30,549 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-26 22:41:30,550 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-26 22:41:30,550 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-26 22:41:30,550 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-26 22:41:30,550 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-26 22:41:30,550 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-26 22:41:30,550 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-26 22:41:30,550 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-26 22:41:30,551 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-26 22:41:30,551 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-26 22:41:30,551 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-26 22:41:30,551 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-26 22:41:30,551 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-26 22:41:30,552 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-26 22:41:30,552 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-26 22:41:30,552 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-26 22:41:30,552 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-26 22:41:30,552 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-26 22:41:30,554 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-26 22:41:30,554 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-26 22:41:30,554 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_9db7a53e-4aaa-4f35-8db3-446a91f6c1ea/bin-2019/utaipan 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 -> Taipan 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 -> c6374d8695c81504f4ccfc7ac3dabef115b6d49d [2018-10-26 22:41:30,600 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-26 22:41:30,612 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-26 22:41:30,616 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-26 22:41:30,617 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-26 22:41:30,618 INFO L276 PluginConnector]: CDTParser initialized [2018-10-26 22:41:30,619 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_9db7a53e-4aaa-4f35-8db3-446a91f6c1ea/bin-2019/utaipan/../../sv-benchmarks/c/recursive-simple/afterrec_2calls_true-unreach-call_true-termination.c [2018-10-26 22:41:30,676 INFO L218 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_9db7a53e-4aaa-4f35-8db3-446a91f6c1ea/bin-2019/utaipan/data/05e88bd9d/530004797dac4e38b6d8db88c83d27df/FLAG36d4bcdc5 [2018-10-26 22:41:31,036 INFO L298 CDTParser]: Found 1 translation units. [2018-10-26 22:41:31,037 INFO L158 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_9db7a53e-4aaa-4f35-8db3-446a91f6c1ea/sv-benchmarks/c/recursive-simple/afterrec_2calls_true-unreach-call_true-termination.c [2018-10-26 22:41:31,041 INFO L346 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_9db7a53e-4aaa-4f35-8db3-446a91f6c1ea/bin-2019/utaipan/data/05e88bd9d/530004797dac4e38b6d8db88c83d27df/FLAG36d4bcdc5 [2018-10-26 22:41:31,054 INFO L354 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_9db7a53e-4aaa-4f35-8db3-446a91f6c1ea/bin-2019/utaipan/data/05e88bd9d/530004797dac4e38b6d8db88c83d27df [2018-10-26 22:41:31,058 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-26 22:41:31,060 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-10-26 22:41:31,061 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-26 22:41:31,061 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-26 22:41:31,065 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-26 22:41:31,066 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 10:41:31" (1/1) ... [2018-10-26 22:41:31,069 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3005e31a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:41:31, skipping insertion in model container [2018-10-26 22:41:31,070 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 10:41:31" (1/1) ... [2018-10-26 22:41:31,079 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-26 22:41:31,098 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-26 22:41:31,222 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-26 22:41:31,224 INFO L189 MainTranslator]: Completed pre-run [2018-10-26 22:41:31,235 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-26 22:41:31,247 INFO L193 MainTranslator]: Completed translation [2018-10-26 22:41:31,247 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:41:31 WrapperNode [2018-10-26 22:41:31,247 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-26 22:41:31,248 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-26 22:41:31,248 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-26 22:41:31,248 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-26 22:41:31,257 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:41:31" (1/1) ... [2018-10-26 22:41:31,263 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:41:31" (1/1) ... [2018-10-26 22:41:31,269 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-26 22:41:31,269 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-26 22:41:31,269 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-26 22:41:31,269 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-26 22:41:31,279 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:41:31" (1/1) ... [2018-10-26 22:41:31,280 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:41:31" (1/1) ... [2018-10-26 22:41:31,280 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:41:31" (1/1) ... [2018-10-26 22:41:31,280 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:41:31" (1/1) ... [2018-10-26 22:41:31,284 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:41:31" (1/1) ... [2018-10-26 22:41:31,286 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:41:31" (1/1) ... [2018-10-26 22:41:31,287 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:41:31" (1/1) ... [2018-10-26 22:41:31,289 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-26 22:41:31,289 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-26 22:41:31,289 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-26 22:41:31,290 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-26 22:41:31,290 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:41:31" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9db7a53e-4aaa-4f35-8db3-446a91f6c1ea/bin-2019/utaipan/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 [2018-10-26 22:41:31,464 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-26 22:41:31,465 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-26 22:41:31,465 INFO L130 BoogieDeclarations]: Found specification of procedure f [2018-10-26 22:41:31,467 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2018-10-26 22:41:31,467 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-26 22:41:31,467 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-26 22:41:31,467 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-26 22:41:31,468 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-26 22:41:31,468 INFO L130 BoogieDeclarations]: Found specification of procedure f2 [2018-10-26 22:41:31,470 INFO L138 BoogieDeclarations]: Found implementation of procedure f2 [2018-10-26 22:41:31,780 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-26 22:41:31,781 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 10:41:31 BoogieIcfgContainer [2018-10-26 22:41:31,781 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-26 22:41:31,782 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-26 22:41:31,782 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-26 22:41:31,786 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-26 22:41:31,786 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 10:41:31" (1/3) ... [2018-10-26 22:41:31,787 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22718122 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 10:41:31, skipping insertion in model container [2018-10-26 22:41:31,787 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:41:31" (2/3) ... [2018-10-26 22:41:31,788 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22718122 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 10:41:31, skipping insertion in model container [2018-10-26 22:41:31,788 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 10:41:31" (3/3) ... [2018-10-26 22:41:31,790 INFO L112 eAbstractionObserver]: Analyzing ICFG afterrec_2calls_true-unreach-call_true-termination.c [2018-10-26 22:41:31,800 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-26 22:41:31,807 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2018-10-26 22:41:31,819 INFO L257 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2018-10-26 22:41:31,856 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-26 22:41:31,857 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-26 22:41:31,857 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-26 22:41:31,857 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-26 22:41:31,857 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-26 22:41:31,857 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-26 22:41:31,857 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-26 22:41:31,858 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-26 22:41:31,879 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2018-10-26 22:41:31,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-26 22:41:31,892 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:41:31,893 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:41:31,895 INFO L424 AbstractCegarLoop]: === Iteration 1 === [fErr0ASSERT_VIOLATIONERROR_FUNCTION, f2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:41:31,904 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:41:31,905 INFO L82 PathProgramCache]: Analyzing trace with hash -1662209305, now seen corresponding path program 1 times [2018-10-26 22:41:31,907 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-26 22:41:31,952 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:41:31,952 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:41:31,952 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:41:31,952 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-26 22:41:31,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:41:32,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:41:32,089 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 22:41:32,089 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-26 22:41:32,090 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-26 22:41:32,093 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-26 22:41:32,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-26 22:41:32,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-10-26 22:41:32,106 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 4 states. [2018-10-26 22:41:32,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:41:32,221 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2018-10-26 22:41:32,222 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-26 22:41:32,223 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2018-10-26 22:41:32,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:41:32,231 INFO L225 Difference]: With dead ends: 31 [2018-10-26 22:41:32,231 INFO L226 Difference]: Without dead ends: 0 [2018-10-26 22:41:32,235 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-10-26 22:41:32,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-10-26 22:41:32,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-10-26 22:41:32,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-10-26 22:41:32,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-10-26 22:41:32,267 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 13 [2018-10-26 22:41:32,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:41:32,267 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-10-26 22:41:32,267 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-26 22:41:32,267 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-10-26 22:41:32,267 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-10-26 22:41:32,273 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-10-26 22:41:32,349 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-10-26 22:41:32,349 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-10-26 22:41:32,349 INFO L425 ceAbstractionStarter]: For program point fErr0ASSERT_VIOLATIONERROR_FUNCTION(line 10) no Hoare annotation was computed. [2018-10-26 22:41:32,350 INFO L421 ceAbstractionStarter]: At program point L9(line 9) the Hoare annotation is: (< 2 |f_#in~n|) [2018-10-26 22:41:32,350 INFO L425 ceAbstractionStarter]: For program point L9-1(lines 6 11) no Hoare annotation was computed. [2018-10-26 22:41:32,350 INFO L425 ceAbstractionStarter]: For program point fEXIT(lines 6 11) no Hoare annotation was computed. [2018-10-26 22:41:32,350 INFO L425 ceAbstractionStarter]: For program point L7(line 7) no Hoare annotation was computed. [2018-10-26 22:41:32,350 INFO L428 ceAbstractionStarter]: At program point fENTRY(lines 6 11) the Hoare annotation is: true [2018-10-26 22:41:32,350 INFO L425 ceAbstractionStarter]: For program point fFINAL(lines 6 11) no Hoare annotation was computed. [2018-10-26 22:41:32,351 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-10-26 22:41:32,351 INFO L428 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-10-26 22:41:32,351 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-10-26 22:41:32,352 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-10-26 22:41:32,353 INFO L428 ceAbstractionStarter]: At program point mainENTRY(lines 20 22) the Hoare annotation is: true [2018-10-26 22:41:32,353 INFO L425 ceAbstractionStarter]: For program point mainFINAL(lines 20 22) no Hoare annotation was computed. [2018-10-26 22:41:32,353 INFO L425 ceAbstractionStarter]: For program point mainEXIT(lines 20 22) no Hoare annotation was computed. [2018-10-26 22:41:32,353 INFO L428 ceAbstractionStarter]: At program point L16(line 16) the Hoare annotation is: true [2018-10-26 22:41:32,353 INFO L425 ceAbstractionStarter]: For program point f2EXIT(lines 13 18) no Hoare annotation was computed. [2018-10-26 22:41:32,353 INFO L425 ceAbstractionStarter]: For program point L16-1(lines 13 18) no Hoare annotation was computed. [2018-10-26 22:41:32,354 INFO L425 ceAbstractionStarter]: For program point L14(line 14) no Hoare annotation was computed. [2018-10-26 22:41:32,354 INFO L428 ceAbstractionStarter]: At program point f2ENTRY(lines 13 18) the Hoare annotation is: true [2018-10-26 22:41:32,354 INFO L425 ceAbstractionStarter]: For program point f2FINAL(lines 13 18) no Hoare annotation was computed. [2018-10-26 22:41:32,354 INFO L425 ceAbstractionStarter]: For program point f2Err0ASSERT_VIOLATIONERROR_FUNCTION(line 17) no Hoare annotation was computed. [2018-10-26 22:41:32,356 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.10 10:41:32 BoogieIcfgContainer [2018-10-26 22:41:32,356 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-26 22:41:32,357 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-10-26 22:41:32,357 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-10-26 22:41:32,360 INFO L276 PluginConnector]: Witness Printer initialized [2018-10-26 22:41:32,361 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 10:41:31" (3/4) ... [2018-10-26 22:41:32,365 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-10-26 22:41:32,371 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-10-26 22:41:32,371 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure f [2018-10-26 22:41:32,371 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-10-26 22:41:32,372 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure f2 [2018-10-26 22:41:32,375 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2018-10-26 22:41:32,375 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2018-10-26 22:41:32,376 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-10-26 22:41:32,413 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_9db7a53e-4aaa-4f35-8db3-446a91f6c1ea/bin-2019/utaipan/witness.graphml [2018-10-26 22:41:32,413 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-10-26 22:41:32,414 INFO L168 Benchmark]: Toolchain (without parser) took 1355.58 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 152.0 MB). Free memory was 959.6 MB in the beginning and 1.1 GB in the end (delta: -153.8 MB). There was no memory consumed. Max. memory is 11.5 GB. [2018-10-26 22:41:32,416 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 1.0 GB. Free memory is still 985.4 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-26 22:41:32,416 INFO L168 Benchmark]: CACSL2BoogieTranslator took 187.02 ms. Allocated memory is still 1.0 GB. Free memory was 959.6 MB in the beginning and 948.9 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-10-26 22:41:32,418 INFO L168 Benchmark]: Boogie Procedure Inliner took 20.68 ms. Allocated memory is still 1.0 GB. Free memory is still 948.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-26 22:41:32,418 INFO L168 Benchmark]: Boogie Preprocessor took 20.06 ms. Allocated memory is still 1.0 GB. Free memory was 948.9 MB in the beginning and 946.2 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2018-10-26 22:41:32,419 INFO L168 Benchmark]: RCFGBuilder took 491.69 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 152.0 MB). Free memory was 946.2 MB in the beginning and 1.1 GB in the end (delta: -195.2 MB). Peak memory consumption was 20.0 MB. Max. memory is 11.5 GB. [2018-10-26 22:41:32,420 INFO L168 Benchmark]: TraceAbstraction took 574.69 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: 25.2 MB). Peak memory consumption was 25.2 MB. Max. memory is 11.5 GB. [2018-10-26 22:41:32,422 INFO L168 Benchmark]: Witness Printer took 56.28 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. [2018-10-26 22:41:32,425 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 1.0 GB. Free memory is still 985.4 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 187.02 ms. Allocated memory is still 1.0 GB. Free memory was 959.6 MB in the beginning and 948.9 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 20.68 ms. Allocated memory is still 1.0 GB. Free memory is still 948.9 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 20.06 ms. Allocated memory is still 1.0 GB. Free memory was 948.9 MB in the beginning and 946.2 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 491.69 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 152.0 MB). Free memory was 946.2 MB in the beginning and 1.1 GB in the end (delta: -195.2 MB). Peak memory consumption was 20.0 MB. Max. memory is 11.5 GB. * TraceAbstraction took 574.69 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: 25.2 MB). Peak memory consumption was 25.2 MB. Max. memory is 11.5 GB. * Witness Printer took 56.28 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: - PositiveResult [Line: 10]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 17]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 23 locations, 2 error locations. SAFE Result, 0.5s OverallTime, 1 OverallIterations, 1 TraceHistogramMax, 0.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 9 SDtfs, 5 SDslu, 15 SDs, 0 SdLazy, 5 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=23occurred 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, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 10 PreInvPairs, 10 NumberOfFragments, 11 HoareAnnotationTreeSize, 10 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 8 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 13 NumberOfCodeBlocks, 13 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 12 ConstructedInterpolants, 0 QuantifiedInterpolants, 192 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...