./Ultimate.py --spec ../../sv-benchmarks/c/ReachSafety.prp --file ../../sv-benchmarks/c/recursive/Addition01_true-unreach-call_true-no-overflow_true-termination.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5842f4b8 Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_add136a4-ead2-4699-859d-0b1b182d3775/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_add136a4-ead2-4699-859d-0b1b182d3775/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_add136a4-ead2-4699-859d-0b1b182d3775/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_add136a4-ead2-4699-859d-0b1b182d3775/bin-2019/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursive/Addition01_true-unreach-call_true-no-overflow_true-termination.c -s /tmp/vcloud-vcloud-master/worker/working_dir_add136a4-ead2-4699-859d-0b1b182d3775/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_add136a4-ead2-4699-859d-0b1b182d3775/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 91d2600fad1210650d8ad3da481cdcc11b280095 ......................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-5842f4b [2018-11-18 12:19:38,390 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-18 12:19:38,392 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-18 12:19:38,405 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-18 12:19:38,406 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-18 12:19:38,407 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-18 12:19:38,409 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-18 12:19:38,411 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-18 12:19:38,413 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-18 12:19:38,415 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-18 12:19:38,417 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-18 12:19:38,418 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-18 12:19:38,419 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-18 12:19:38,421 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-18 12:19:38,427 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-18 12:19:38,428 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-18 12:19:38,428 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-18 12:19:38,429 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-18 12:19:38,434 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-18 12:19:38,436 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-18 12:19:38,439 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-18 12:19:38,440 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-18 12:19:38,441 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-18 12:19:38,441 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-18 12:19:38,442 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-18 12:19:38,442 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-18 12:19:38,443 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-18 12:19:38,443 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-18 12:19:38,444 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-18 12:19:38,445 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-18 12:19:38,445 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-18 12:19:38,445 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-18 12:19:38,445 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-18 12:19:38,446 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-18 12:19:38,446 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-18 12:19:38,447 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-18 12:19:38,447 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_add136a4-ead2-4699-859d-0b1b182d3775/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2018-11-18 12:19:38,460 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-18 12:19:38,461 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-18 12:19:38,462 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-18 12:19:38,462 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-18 12:19:38,462 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-18 12:19:38,463 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-18 12:19:38,463 INFO L133 SettingsManager]: * Explicit value domain=true [2018-11-18 12:19:38,463 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-18 12:19:38,463 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-18 12:19:38,463 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-18 12:19:38,463 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-18 12:19:38,463 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-18 12:19:38,463 INFO L133 SettingsManager]: * Interval Domain=false [2018-11-18 12:19:38,464 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-18 12:19:38,464 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-18 12:19:38,464 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-18 12:19:38,464 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-18 12:19:38,464 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-18 12:19:38,464 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-18 12:19:38,465 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-18 12:19:38,465 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-18 12:19:38,465 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-18 12:19:38,465 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-18 12:19:38,465 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-18 12:19:38,465 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-18 12:19:38,465 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-18 12:19:38,465 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-18 12:19:38,466 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-18 12:19:38,466 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-18 12:19:38,468 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-18 12:19:38,469 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-18 12:19:38,469 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-18 12:19:38,469 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-18 12:19:38,470 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-18 12:19:38,470 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-18 12:19:38,470 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-18 12:19:38,470 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-18 12:19:38,470 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_add136a4-ead2-4699-859d-0b1b182d3775/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 -> 91d2600fad1210650d8ad3da481cdcc11b280095 [2018-11-18 12:19:38,514 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-18 12:19:38,528 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-18 12:19:38,531 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-18 12:19:38,532 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-18 12:19:38,532 INFO L276 PluginConnector]: CDTParser initialized [2018-11-18 12:19:38,533 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_add136a4-ead2-4699-859d-0b1b182d3775/bin-2019/utaipan/../../sv-benchmarks/c/recursive/Addition01_true-unreach-call_true-no-overflow_true-termination.c [2018-11-18 12:19:38,577 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_add136a4-ead2-4699-859d-0b1b182d3775/bin-2019/utaipan/data/f31ed4248/f7918a67f93c489cacf930f65d0e308b/FLAGa3169c430 [2018-11-18 12:19:38,936 INFO L307 CDTParser]: Found 1 translation units. [2018-11-18 12:19:38,936 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_add136a4-ead2-4699-859d-0b1b182d3775/sv-benchmarks/c/recursive/Addition01_true-unreach-call_true-no-overflow_true-termination.c [2018-11-18 12:19:38,940 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_add136a4-ead2-4699-859d-0b1b182d3775/bin-2019/utaipan/data/f31ed4248/f7918a67f93c489cacf930f65d0e308b/FLAGa3169c430 [2018-11-18 12:19:38,950 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_add136a4-ead2-4699-859d-0b1b182d3775/bin-2019/utaipan/data/f31ed4248/f7918a67f93c489cacf930f65d0e308b [2018-11-18 12:19:38,952 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-18 12:19:38,953 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-18 12:19:38,953 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-18 12:19:38,953 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-18 12:19:38,956 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-18 12:19:38,956 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 12:19:38" (1/1) ... [2018-11-18 12:19:38,959 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@30040a42 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 12:19:38, skipping insertion in model container [2018-11-18 12:19:38,959 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 12:19:38" (1/1) ... [2018-11-18 12:19:38,965 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-18 12:19:38,977 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-18 12:19:39,086 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 12:19:39,088 INFO L191 MainTranslator]: Completed pre-run [2018-11-18 12:19:39,099 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 12:19:39,109 INFO L195 MainTranslator]: Completed translation [2018-11-18 12:19:39,110 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 12:19:39 WrapperNode [2018-11-18 12:19:39,110 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-18 12:19:39,110 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-18 12:19:39,110 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-18 12:19:39,110 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-18 12:19:39,118 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 12:19:39" (1/1) ... [2018-11-18 12:19:39,122 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 12:19:39" (1/1) ... [2018-11-18 12:19:39,128 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-18 12:19:39,129 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-18 12:19:39,129 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-18 12:19:39,129 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-18 12:19:39,137 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 12:19:39" (1/1) ... [2018-11-18 12:19:39,137 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 12:19:39" (1/1) ... [2018-11-18 12:19:39,138 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 12:19:39" (1/1) ... [2018-11-18 12:19:39,138 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 12:19:39" (1/1) ... [2018-11-18 12:19:39,141 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 12:19:39" (1/1) ... [2018-11-18 12:19:39,143 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 12:19:39" (1/1) ... [2018-11-18 12:19:39,143 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 12:19:39" (1/1) ... [2018-11-18 12:19:39,145 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-18 12:19:39,145 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-18 12:19:39,145 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-18 12:19:39,145 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-18 12:19:39,147 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 12:19:39" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_add136a4-ead2-4699-859d-0b1b182d3775/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 [2018-11-18 12:19:39,260 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-18 12:19:39,260 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-18 12:19:39,260 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-18 12:19:39,260 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-18 12:19:39,261 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-18 12:19:39,261 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-18 12:19:39,261 INFO L130 BoogieDeclarations]: Found specification of procedure addition [2018-11-18 12:19:39,261 INFO L138 BoogieDeclarations]: Found implementation of procedure addition [2018-11-18 12:19:39,462 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-18 12:19:39,463 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 12:19:39 BoogieIcfgContainer [2018-11-18 12:19:39,463 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-18 12:19:39,463 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-18 12:19:39,463 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-18 12:19:39,465 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-18 12:19:39,465 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 12:19:38" (1/3) ... [2018-11-18 12:19:39,466 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@348a92dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 12:19:39, skipping insertion in model container [2018-11-18 12:19:39,466 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 12:19:39" (2/3) ... [2018-11-18 12:19:39,466 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@348a92dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 12:19:39, skipping insertion in model container [2018-11-18 12:19:39,466 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 12:19:39" (3/3) ... [2018-11-18 12:19:39,468 INFO L112 eAbstractionObserver]: Analyzing ICFG Addition01_true-unreach-call_true-no-overflow_true-termination.c [2018-11-18 12:19:39,474 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-18 12:19:39,479 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-18 12:19:39,488 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-18 12:19:39,512 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-18 12:19:39,512 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-18 12:19:39,512 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-18 12:19:39,513 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-18 12:19:39,513 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-18 12:19:39,513 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-18 12:19:39,513 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-18 12:19:39,513 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-18 12:19:39,524 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2018-11-18 12:19:39,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-11-18 12:19:39,529 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:19:39,530 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 12:19:39,532 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 12:19:39,538 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:19:39,539 INFO L82 PathProgramCache]: Analyzing trace with hash -854965079, now seen corresponding path program 1 times [2018-11-18 12:19:39,542 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 12:19:39,572 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:19:39,572 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 12:19:39,572 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:19:39,572 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 12:19:39,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:19:39,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:19:39,800 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 12:19:39,801 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-18 12:19:39,801 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 12:19:39,803 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-18 12:19:39,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-18 12:19:39,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-11-18 12:19:39,818 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 6 states. [2018-11-18 12:19:40,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 12:19:40,075 INFO L93 Difference]: Finished difference Result 38 states and 47 transitions. [2018-11-18 12:19:40,075 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-18 12:19:40,076 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2018-11-18 12:19:40,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 12:19:40,083 INFO L225 Difference]: With dead ends: 38 [2018-11-18 12:19:40,083 INFO L226 Difference]: Without dead ends: 24 [2018-11-18 12:19:40,087 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-11-18 12:19:40,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-11-18 12:19:40,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-11-18 12:19:40,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-11-18 12:19:40,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2018-11-18 12:19:40,119 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 15 [2018-11-18 12:19:40,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 12:19:40,120 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2018-11-18 12:19:40,120 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-18 12:19:40,120 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2018-11-18 12:19:40,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-11-18 12:19:40,121 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:19:40,121 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 12:19:40,122 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 12:19:40,122 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:19:40,122 INFO L82 PathProgramCache]: Analyzing trace with hash -1632999070, now seen corresponding path program 1 times [2018-11-18 12:19:40,122 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 12:19:40,123 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:19:40,123 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 12:19:40,123 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:19:40,123 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 12:19:40,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:19:40,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:19:40,171 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 12:19:40,171 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-18 12:19:40,171 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 12:19:40,173 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-18 12:19:40,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-18 12:19:40,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-18 12:19:40,174 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand 4 states. [2018-11-18 12:19:40,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 12:19:40,204 INFO L93 Difference]: Finished difference Result 34 states and 42 transitions. [2018-11-18 12:19:40,204 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-18 12:19:40,205 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2018-11-18 12:19:40,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 12:19:40,205 INFO L225 Difference]: With dead ends: 34 [2018-11-18 12:19:40,206 INFO L226 Difference]: Without dead ends: 26 [2018-11-18 12:19:40,206 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-18 12:19:40,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-11-18 12:19:40,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2018-11-18 12:19:40,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-11-18 12:19:40,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2018-11-18 12:19:40,212 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 17 [2018-11-18 12:19:40,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 12:19:40,212 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2018-11-18 12:19:40,212 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-18 12:19:40,213 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2018-11-18 12:19:40,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-11-18 12:19:40,213 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:19:40,214 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 12:19:40,214 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 12:19:40,214 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:19:40,214 INFO L82 PathProgramCache]: Analyzing trace with hash 1746800232, now seen corresponding path program 1 times [2018-11-18 12:19:40,214 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 12:19:40,215 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:19:40,215 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 12:19:40,215 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:19:40,215 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 12:19:40,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:19:40,531 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-11-18 12:19:40,531 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:19:40,532 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 12:19:40,532 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 23 with the following transitions: [2018-11-18 12:19:40,534 INFO L202 CegarAbsIntRunner]: [0], [4], [8], [12], [14], [18], [20], [23], [26], [27], [30], [32], [40], [41], [42], [43], [45], [46], [47], [48] [2018-11-18 12:19:40,557 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-18 12:19:40,558 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-18 12:19:40,692 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-18 12:19:40,693 INFO L272 AbstractInterpreter]: Visited 20 different actions 48 times. Merged at 2 different actions 6 times. Never widened. Performed 134 root evaluator evaluations with a maximum evaluation depth of 4. Performed 134 inverse root evaluator evaluations with a maximum inverse evaluation depth of 4. Found 4 fixpoints after 3 different actions. Largest state had 6 variables. [2018-11-18 12:19:40,714 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:19:40,715 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-18 12:19:40,715 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:19:40,715 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_add136a4-ead2-4699-859d-0b1b182d3775/bin-2019/utaipan/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 [2018-11-18 12:19:40,733 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 12:19:40,734 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-18 12:19:40,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:19:40,757 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 12:19:41,227 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-11-18 12:19:41,228 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 12:19:41,507 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-11-18 12:19:41,525 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-18 12:19:41,525 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2018-11-18 12:19:41,525 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 12:19:41,526 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-11-18 12:19:41,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-11-18 12:19:41,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2018-11-18 12:19:41,527 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 18 states. [2018-11-18 12:19:41,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 12:19:41,919 INFO L93 Difference]: Finished difference Result 38 states and 47 transitions. [2018-11-18 12:19:41,920 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-11-18 12:19:41,920 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2018-11-18 12:19:41,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 12:19:41,921 INFO L225 Difference]: With dead ends: 38 [2018-11-18 12:19:41,921 INFO L226 Difference]: Without dead ends: 32 [2018-11-18 12:19:41,921 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 29 SyntacticMatches, 5 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=127, Invalid=523, Unknown=0, NotChecked=0, Total=650 [2018-11-18 12:19:41,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-11-18 12:19:41,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 25. [2018-11-18 12:19:41,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-11-18 12:19:41,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2018-11-18 12:19:41,927 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 22 [2018-11-18 12:19:41,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 12:19:41,928 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2018-11-18 12:19:41,928 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-11-18 12:19:41,928 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2018-11-18 12:19:41,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-11-18 12:19:41,928 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:19:41,929 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 12:19:41,929 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 12:19:41,929 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:19:41,929 INFO L82 PathProgramCache]: Analyzing trace with hash -1365148867, now seen corresponding path program 1 times [2018-11-18 12:19:41,929 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 12:19:41,930 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:19:41,930 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 12:19:41,930 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:19:41,930 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 12:19:41,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:19:42,003 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-11-18 12:19:42,004 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:19:42,004 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 12:19:42,004 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 24 with the following transitions: [2018-11-18 12:19:42,004 INFO L202 CegarAbsIntRunner]: [0], [4], [8], [12], [14], [18], [20], [23], [26], [27], [33], [36], [38], [40], [41], [42], [43], [45], [46], [49], [50] [2018-11-18 12:19:42,005 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-18 12:19:42,005 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-18 12:19:42,047 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-18 12:19:42,047 INFO L272 AbstractInterpreter]: Visited 21 different actions 52 times. Merged at 2 different actions 6 times. Never widened. Performed 142 root evaluator evaluations with a maximum evaluation depth of 4. Performed 142 inverse root evaluator evaluations with a maximum inverse evaluation depth of 4. Found 4 fixpoints after 3 different actions. Largest state had 6 variables. [2018-11-18 12:19:42,058 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:19:42,058 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-18 12:19:42,058 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:19:42,058 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_add136a4-ead2-4699-859d-0b1b182d3775/bin-2019/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 12:19:42,066 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 12:19:42,066 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-18 12:19:42,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:19:42,075 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 12:19:42,083 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-11-18 12:19:42,083 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 12:19:42,173 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-11-18 12:19:42,191 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-18 12:19:42,191 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 8 [2018-11-18 12:19:42,191 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 12:19:42,191 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-18 12:19:42,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-18 12:19:42,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2018-11-18 12:19:42,192 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand 7 states. [2018-11-18 12:19:42,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 12:19:42,248 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2018-11-18 12:19:42,249 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-18 12:19:42,249 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 23 [2018-11-18 12:19:42,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 12:19:42,250 INFO L225 Difference]: With dead ends: 27 [2018-11-18 12:19:42,250 INFO L226 Difference]: Without dead ends: 0 [2018-11-18 12:19:42,251 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2018-11-18 12:19:42,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-11-18 12:19:42,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-11-18 12:19:42,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-11-18 12:19:42,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-11-18 12:19:42,252 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 23 [2018-11-18 12:19:42,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 12:19:42,252 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-18 12:19:42,252 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-18 12:19:42,252 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-11-18 12:19:42,253 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-11-18 12:19:42,258 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-11-18 12:19:42,348 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-11-18 12:19:42,348 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-11-18 12:19:42,348 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-11-18 12:19:42,348 INFO L428 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-11-18 12:19:42,348 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-11-18 12:19:42,348 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-11-18 12:19:42,349 INFO L425 ceAbstractionStarter]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 43) no Hoare annotation was computed. [2018-11-18 12:19:42,349 INFO L428 ceAbstractionStarter]: At program point mainENTRY(lines 26 45) the Hoare annotation is: true [2018-11-18 12:19:42,349 INFO L425 ceAbstractionStarter]: For program point L28(lines 28 32) no Hoare annotation was computed. [2018-11-18 12:19:42,349 INFO L425 ceAbstractionStarter]: For program point mainEXIT(lines 26 45) no Hoare annotation was computed. [2018-11-18 12:19:42,349 INFO L425 ceAbstractionStarter]: For program point mainFINAL(lines 26 45) no Hoare annotation was computed. [2018-11-18 12:19:42,349 INFO L425 ceAbstractionStarter]: For program point L43(line 43) no Hoare annotation was computed. [2018-11-18 12:19:42,349 INFO L425 ceAbstractionStarter]: For program point L40(lines 40 44) no Hoare annotation was computed. [2018-11-18 12:19:42,349 INFO L421 ceAbstractionStarter]: At program point L39(line 39) the Hoare annotation is: (<= 0 main_~n~0) [2018-11-18 12:19:42,349 INFO L425 ceAbstractionStarter]: For program point L39-1(line 39) no Hoare annotation was computed. [2018-11-18 12:19:42,349 INFO L425 ceAbstractionStarter]: For program point L34(lines 34 38) no Hoare annotation was computed. [2018-11-18 12:19:42,349 INFO L425 ceAbstractionStarter]: For program point additionFINAL(lines 13 23) no Hoare annotation was computed. [2018-11-18 12:19:42,349 INFO L421 ceAbstractionStarter]: At program point L21(line 21) the Hoare annotation is: (let ((.cse1 (+ |addition_#in~n| |addition_#in~m|)) (.cse0 (+ addition_~m addition_~n))) (and (<= .cse0 .cse1) (= |addition_#in~m| addition_~m) (<= .cse1 .cse0) (<= (+ addition_~n 1) 0))) [2018-11-18 12:19:42,349 INFO L425 ceAbstractionStarter]: For program point L20(lines 20 22) no Hoare annotation was computed. [2018-11-18 12:19:42,349 INFO L425 ceAbstractionStarter]: For program point L21-1(line 21) no Hoare annotation was computed. [2018-11-18 12:19:42,349 INFO L421 ceAbstractionStarter]: At program point L18(line 18) the Hoare annotation is: (let ((.cse1 (+ |addition_#in~n| |addition_#in~m|)) (.cse0 (+ addition_~m addition_~n))) (and (<= .cse0 .cse1) (< 0 addition_~n) (= |addition_#in~m| addition_~m) (<= .cse1 .cse0))) [2018-11-18 12:19:42,350 INFO L425 ceAbstractionStarter]: For program point L17(lines 17 19) no Hoare annotation was computed. [2018-11-18 12:19:42,350 INFO L425 ceAbstractionStarter]: For program point L18-1(line 18) no Hoare annotation was computed. [2018-11-18 12:19:42,350 INFO L428 ceAbstractionStarter]: At program point additionENTRY(lines 13 23) the Hoare annotation is: true [2018-11-18 12:19:42,350 INFO L425 ceAbstractionStarter]: For program point L14(lines 14 16) no Hoare annotation was computed. [2018-11-18 12:19:42,350 INFO L425 ceAbstractionStarter]: For program point additionEXIT(lines 13 23) no Hoare annotation was computed. [2018-11-18 12:19:42,351 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.11 12:19:42 BoogieIcfgContainer [2018-11-18 12:19:42,351 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-18 12:19:42,352 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-18 12:19:42,352 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-18 12:19:42,352 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-18 12:19:42,352 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 12:19:39" (3/4) ... [2018-11-18 12:19:42,354 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-11-18 12:19:42,358 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-11-18 12:19:42,358 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-11-18 12:19:42,359 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure addition [2018-11-18 12:19:42,361 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2018-11-18 12:19:42,362 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2018-11-18 12:19:42,362 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-11-18 12:19:42,392 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_add136a4-ead2-4699-859d-0b1b182d3775/bin-2019/utaipan/witness.graphml [2018-11-18 12:19:42,392 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-18 12:19:42,393 INFO L168 Benchmark]: Toolchain (without parser) took 3441.06 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 177.2 MB). Free memory was 954.4 MB in the beginning and 911.0 MB in the end (delta: 43.4 MB). Peak memory consumption was 220.6 MB. Max. memory is 11.5 GB. [2018-11-18 12:19:42,394 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 1.0 GB. Free memory is still 985.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 12:19:42,395 INFO L168 Benchmark]: CACSL2BoogieTranslator took 156.66 ms. Allocated memory is still 1.0 GB. Free memory was 954.4 MB in the beginning and 943.7 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-11-18 12:19:42,395 INFO L168 Benchmark]: Boogie Procedure Inliner took 18.40 ms. Allocated memory is still 1.0 GB. Free memory is still 943.7 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 12:19:42,395 INFO L168 Benchmark]: Boogie Preprocessor took 15.96 ms. Allocated memory is still 1.0 GB. Free memory is still 941.0 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 12:19:42,395 INFO L168 Benchmark]: RCFGBuilder took 317.68 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 177.2 MB). Free memory was 941.0 MB in the beginning and 1.2 GB in the end (delta: -222.0 MB). Peak memory consumption was 23.6 MB. Max. memory is 11.5 GB. [2018-11-18 12:19:42,396 INFO L168 Benchmark]: TraceAbstraction took 2888.25 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 914.4 MB in the end (delta: 248.6 MB). Peak memory consumption was 248.6 MB. Max. memory is 11.5 GB. [2018-11-18 12:19:42,396 INFO L168 Benchmark]: Witness Printer took 40.97 ms. Allocated memory is still 1.2 GB. Free memory was 914.4 MB in the beginning and 911.0 MB in the end (delta: 3.4 MB). Peak memory consumption was 3.4 MB. Max. memory is 11.5 GB. [2018-11-18 12:19:42,398 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 1.0 GB. Free memory is still 985.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 156.66 ms. Allocated memory is still 1.0 GB. Free memory was 954.4 MB in the beginning and 943.7 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 18.40 ms. Allocated memory is still 1.0 GB. Free memory is still 943.7 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 15.96 ms. Allocated memory is still 1.0 GB. Free memory is still 941.0 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 317.68 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 177.2 MB). Free memory was 941.0 MB in the beginning and 1.2 GB in the end (delta: -222.0 MB). Peak memory consumption was 23.6 MB. Max. memory is 11.5 GB. * TraceAbstraction took 2888.25 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 914.4 MB in the end (delta: 248.6 MB). Peak memory consumption was 248.6 MB. Max. memory is 11.5 GB. * Witness Printer took 40.97 ms. Allocated memory is still 1.2 GB. Free memory was 914.4 MB in the beginning and 911.0 MB in the end (delta: 3.4 MB). Peak memory consumption was 3.4 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 43]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 26 locations, 1 error locations. SAFE Result, 2.8s OverallTime, 4 OverallIterations, 2 TraceHistogramMax, 0.7s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 86 SDtfs, 71 SDslu, 214 SDs, 0 SdLazy, 272 SolverSat, 44 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 121 GetRequests, 76 SyntacticMatches, 8 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 1.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=26occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.2s AbstIntTime, 2 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 9 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 14 PreInvPairs, 14 NumberOfFragments, 52 HoareAnnotationTreeSize, 14 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 8 FomulaSimplificationsInter, 16 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 1.4s InterpolantComputationTime, 122 NumberOfCodeBlocks, 122 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 159 ConstructedInterpolants, 0 QuantifiedInterpolants, 13597 SizeOfPredicates, 12 NumberOfNonLiveVariables, 129 ConjunctsInSsa, 31 ConjunctsInUnsatCore, 8 InterpolantComputations, 2 PerfectInterpolantSequences, 12/24 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...