./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/recursive-simple/id_b5_o10_true-unreach-call_true-termination_true-no-overflow.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 635dfa2a Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_30c4b603-32c7-4b64-842e-2ce1e200535b/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_30c4b603-32c7-4b64-842e-2ce1e200535b/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_30c4b603-32c7-4b64-842e-2ce1e200535b/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_30c4b603-32c7-4b64-842e-2ce1e200535b/bin-2019/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursive-simple/id_b5_o10_true-unreach-call_true-termination_true-no-overflow.c -s /tmp/vcloud-vcloud-master/worker/working_dir_30c4b603-32c7-4b64-842e-2ce1e200535b/bin-2019/utaipan/config/svcomp-Overflow-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_30c4b603-32c7-4b64-842e-2ce1e200535b/bin-2019/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 0449565d36be00deee168302da89fb227fc941e3 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-635dfa2 [2018-12-02 21:20:55,427 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-02 21:20:55,428 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-02 21:20:55,434 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-02 21:20:55,434 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-02 21:20:55,435 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-02 21:20:55,436 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-02 21:20:55,436 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-02 21:20:55,437 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-02 21:20:55,437 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-02 21:20:55,438 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-02 21:20:55,438 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-02 21:20:55,439 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-02 21:20:55,439 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-02 21:20:55,440 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-02 21:20:55,440 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-02 21:20:55,440 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-02 21:20:55,441 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-02 21:20:55,442 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-02 21:20:55,443 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-02 21:20:55,444 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-02 21:20:55,444 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-02 21:20:55,445 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-12-02 21:20:55,445 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-02 21:20:55,446 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-02 21:20:55,446 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-02 21:20:55,447 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-02 21:20:55,447 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-02 21:20:55,447 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-02 21:20:55,448 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-02 21:20:55,448 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-02 21:20:55,448 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-02 21:20:55,449 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-02 21:20:55,449 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-02 21:20:55,449 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-02 21:20:55,450 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-02 21:20:55,450 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_30c4b603-32c7-4b64-842e-2ce1e200535b/bin-2019/utaipan/config/svcomp-Overflow-32bit-Taipan_Default.epf [2018-12-02 21:20:55,457 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-02 21:20:55,457 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-02 21:20:55,457 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-02 21:20:55,458 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-12-02 21:20:55,458 INFO L133 SettingsManager]: * User list type=DISABLED [2018-12-02 21:20:55,458 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-12-02 21:20:55,458 INFO L133 SettingsManager]: * Explicit value domain=true [2018-12-02 21:20:55,458 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-12-02 21:20:55,458 INFO L133 SettingsManager]: * Octagon Domain=false [2018-12-02 21:20:55,458 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-12-02 21:20:55,458 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-12-02 21:20:55,458 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-12-02 21:20:55,458 INFO L133 SettingsManager]: * Interval Domain=false [2018-12-02 21:20:55,459 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-02 21:20:55,459 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-02 21:20:55,459 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-12-02 21:20:55,459 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-02 21:20:55,459 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-02 21:20:55,459 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-02 21:20:55,459 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-12-02 21:20:55,459 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-02 21:20:55,460 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-12-02 21:20:55,460 INFO L133 SettingsManager]: * Check absence of signed integer overflows=true [2018-12-02 21:20:55,460 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-02 21:20:55,460 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-02 21:20:55,460 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-12-02 21:20:55,460 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-02 21:20:55,460 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-02 21:20:55,460 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-12-02 21:20:55,460 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-02 21:20:55,460 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-02 21:20:55,460 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-02 21:20:55,461 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-02 21:20:55,461 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-12-02 21:20:55,461 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-12-02 21:20:55,461 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-02 21:20:55,461 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-12-02 21:20:55,461 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-12-02 21:20:55,461 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_30c4b603-32c7-4b64-842e-2ce1e200535b/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 ! overflow) ) 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 -> 0449565d36be00deee168302da89fb227fc941e3 [2018-12-02 21:20:55,479 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-02 21:20:55,488 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-02 21:20:55,490 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-02 21:20:55,491 INFO L271 PluginConnector]: Initializing CDTParser... [2018-12-02 21:20:55,492 INFO L276 PluginConnector]: CDTParser initialized [2018-12-02 21:20:55,492 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_30c4b603-32c7-4b64-842e-2ce1e200535b/bin-2019/utaipan/../../sv-benchmarks/c/recursive-simple/id_b5_o10_true-unreach-call_true-termination_true-no-overflow.c [2018-12-02 21:20:55,530 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_30c4b603-32c7-4b64-842e-2ce1e200535b/bin-2019/utaipan/data/5d742068a/80e58910072a40febc32962d49aff386/FLAGf816bcb50 [2018-12-02 21:20:55,945 INFO L307 CDTParser]: Found 1 translation units. [2018-12-02 21:20:55,945 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_30c4b603-32c7-4b64-842e-2ce1e200535b/sv-benchmarks/c/recursive-simple/id_b5_o10_true-unreach-call_true-termination_true-no-overflow.c [2018-12-02 21:20:55,948 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_30c4b603-32c7-4b64-842e-2ce1e200535b/bin-2019/utaipan/data/5d742068a/80e58910072a40febc32962d49aff386/FLAGf816bcb50 [2018-12-02 21:20:55,956 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_30c4b603-32c7-4b64-842e-2ce1e200535b/bin-2019/utaipan/data/5d742068a/80e58910072a40febc32962d49aff386 [2018-12-02 21:20:55,958 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-02 21:20:55,958 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-12-02 21:20:55,959 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-12-02 21:20:55,959 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-12-02 21:20:55,961 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-12-02 21:20:55,961 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 09:20:55" (1/1) ... [2018-12-02 21:20:55,963 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@79ef9c59 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 09:20:55, skipping insertion in model container [2018-12-02 21:20:55,963 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 09:20:55" (1/1) ... [2018-12-02 21:20:55,967 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-12-02 21:20:55,976 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-12-02 21:20:56,056 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-02 21:20:56,058 INFO L191 MainTranslator]: Completed pre-run [2018-12-02 21:20:56,066 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-02 21:20:56,074 INFO L195 MainTranslator]: Completed translation [2018-12-02 21:20:56,074 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 09:20:56 WrapperNode [2018-12-02 21:20:56,074 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-12-02 21:20:56,075 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-02 21:20:56,075 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-02 21:20:56,075 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-02 21:20:56,080 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 09:20:56" (1/1) ... [2018-12-02 21:20:56,082 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 09:20:56" (1/1) ... [2018-12-02 21:20:56,086 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-02 21:20:56,086 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-02 21:20:56,086 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-02 21:20:56,087 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-02 21:20:56,092 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 09:20:56" (1/1) ... [2018-12-02 21:20:56,092 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 09:20:56" (1/1) ... [2018-12-02 21:20:56,092 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 09:20:56" (1/1) ... [2018-12-02 21:20:56,092 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 09:20:56" (1/1) ... [2018-12-02 21:20:56,094 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 09:20:56" (1/1) ... [2018-12-02 21:20:56,095 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 09:20:56" (1/1) ... [2018-12-02 21:20:56,096 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 09:20:56" (1/1) ... [2018-12-02 21:20:56,097 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-02 21:20:56,097 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-02 21:20:56,097 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-02 21:20:56,097 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-02 21:20:56,097 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 09:20:56" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_30c4b603-32c7-4b64-842e-2ce1e200535b/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 [2018-12-02 21:20:56,160 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-12-02 21:20:56,160 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-12-02 21:20:56,161 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-02 21:20:56,161 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-02 21:20:56,161 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-12-02 21:20:56,161 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-12-02 21:20:56,161 INFO L130 BoogieDeclarations]: Found specification of procedure id [2018-12-02 21:20:56,161 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2018-12-02 21:20:56,254 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-02 21:20:56,254 INFO L280 CfgBuilder]: Removed 0 assue(true) statements. [2018-12-02 21:20:56,254 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 09:20:56 BoogieIcfgContainer [2018-12-02 21:20:56,254 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-02 21:20:56,255 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-02 21:20:56,255 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-02 21:20:56,258 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-02 21:20:56,258 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 09:20:55" (1/3) ... [2018-12-02 21:20:56,259 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a57b17e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 09:20:56, skipping insertion in model container [2018-12-02 21:20:56,259 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 09:20:56" (2/3) ... [2018-12-02 21:20:56,259 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a57b17e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 09:20:56, skipping insertion in model container [2018-12-02 21:20:56,259 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 09:20:56" (3/3) ... [2018-12-02 21:20:56,260 INFO L112 eAbstractionObserver]: Analyzing ICFG id_b5_o10_true-unreach-call_true-termination_true-no-overflow.c [2018-12-02 21:20:56,268 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-02 21:20:56,274 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2018-12-02 21:20:56,288 INFO L257 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2018-12-02 21:20:56,313 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-02 21:20:56,313 INFO L383 AbstractCegarLoop]: Hoare is true [2018-12-02 21:20:56,313 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-02 21:20:56,313 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-02 21:20:56,313 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-02 21:20:56,313 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-02 21:20:56,313 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-02 21:20:56,313 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-02 21:20:56,326 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2018-12-02 21:20:56,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-12-02 21:20:56,330 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 21:20:56,330 INFO L402 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 21:20:56,332 INFO L423 AbstractCegarLoop]: === Iteration 1 === [idErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, idErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-02 21:20:56,335 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 21:20:56,335 INFO L82 PathProgramCache]: Analyzing trace with hash 755938958, now seen corresponding path program 1 times [2018-12-02 21:20:56,336 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 21:20:56,372 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 21:20:56,372 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 21:20:56,372 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 21:20:56,372 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 21:20:56,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 21:20:56,453 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-12-02 21:20:56,454 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-02 21:20:56,455 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-12-02 21:20:56,455 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-02 21:20:56,457 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-12-02 21:20:56,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-12-02 21:20:56,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-12-02 21:20:56,466 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 4 states. [2018-12-02 21:20:56,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 21:20:56,495 INFO L93 Difference]: Finished difference Result 35 states and 38 transitions. [2018-12-02 21:20:56,495 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-12-02 21:20:56,496 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2018-12-02 21:20:56,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 21:20:56,502 INFO L225 Difference]: With dead ends: 35 [2018-12-02 21:20:56,502 INFO L226 Difference]: Without dead ends: 22 [2018-12-02 21:20:56,504 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-12-02 21:20:56,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-12-02 21:20:56,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-12-02 21:20:56,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-12-02 21:20:56,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2018-12-02 21:20:56,528 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 18 [2018-12-02 21:20:56,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 21:20:56,528 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2018-12-02 21:20:56,528 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-12-02 21:20:56,528 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2018-12-02 21:20:56,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-12-02 21:20:56,529 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 21:20:56,529 INFO L402 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 21:20:56,529 INFO L423 AbstractCegarLoop]: === Iteration 2 === [idErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, idErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-02 21:20:56,529 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 21:20:56,529 INFO L82 PathProgramCache]: Analyzing trace with hash 323921339, now seen corresponding path program 1 times [2018-12-02 21:20:56,529 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 21:20:56,530 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 21:20:56,530 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 21:20:56,530 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 21:20:56,530 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 21:20:56,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 21:20:56,570 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-12-02 21:20:56,570 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-02 21:20:56,570 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-12-02 21:20:56,570 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-02 21:20:56,571 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-02 21:20:56,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-02 21:20:56,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-02 21:20:56,572 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 5 states. [2018-12-02 21:20:56,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 21:20:56,593 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2018-12-02 21:20:56,594 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-02 21:20:56,594 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2018-12-02 21:20:56,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 21:20:56,595 INFO L225 Difference]: With dead ends: 33 [2018-12-02 21:20:56,595 INFO L226 Difference]: Without dead ends: 25 [2018-12-02 21:20:56,596 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-02 21:20:56,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-12-02 21:20:56,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 23. [2018-12-02 21:20:56,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-12-02 21:20:56,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2018-12-02 21:20:56,598 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 24 [2018-12-02 21:20:56,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 21:20:56,599 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2018-12-02 21:20:56,599 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-02 21:20:56,599 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2018-12-02 21:20:56,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-12-02 21:20:56,599 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 21:20:56,599 INFO L402 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 21:20:56,599 INFO L423 AbstractCegarLoop]: === Iteration 3 === [idErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, idErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-02 21:20:56,600 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 21:20:56,600 INFO L82 PathProgramCache]: Analyzing trace with hash 324844860, now seen corresponding path program 1 times [2018-12-02 21:20:56,600 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 21:20:56,600 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 21:20:56,600 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 21:20:56,600 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 21:20:56,601 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 21:20:56,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 21:20:56,647 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-12-02 21:20:56,647 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 21:20:56,648 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-02 21:20:56,648 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 25 with the following transitions: [2018-12-02 21:20:56,650 INFO L205 CegarAbsIntRunner]: [0], [4], [16], [19], [20], [22], [23], [24], [26], [30], [31], [32], [33], [34], [36], [38], [39] [2018-12-02 21:20:56,677 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-02 21:20:56,677 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-02 21:20:56,802 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-02 21:20:56,803 INFO L272 AbstractInterpreter]: Visited 17 different actions 68 times. Merged at 6 different actions 24 times. Never widened. Performed 180 root evaluator evaluations with a maximum evaluation depth of 5. Performed 180 inverse root evaluator evaluations with a maximum inverse evaluation depth of 5. Found 1 fixpoints after 1 different actions. Largest state had 5 variables. [2018-12-02 21:20:56,809 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 21:20:56,810 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-02 21:20:56,810 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 21:20:56,810 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_30c4b603-32c7-4b64-842e-2ce1e200535b/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 [2018-12-02 21:20:56,816 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 21:20:56,816 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-02 21:20:56,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 21:20:56,830 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 21:20:56,857 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-12-02 21:20:56,858 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-02 21:20:56,934 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-12-02 21:20:56,949 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-02 21:20:56,949 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2018-12-02 21:20:56,949 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-02 21:20:56,949 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-12-02 21:20:56,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-12-02 21:20:56,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2018-12-02 21:20:56,950 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 9 states. [2018-12-02 21:20:56,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 21:20:56,981 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2018-12-02 21:20:56,981 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-12-02 21:20:56,981 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 24 [2018-12-02 21:20:56,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 21:20:56,982 INFO L225 Difference]: With dead ends: 29 [2018-12-02 21:20:56,982 INFO L226 Difference]: Without dead ends: 28 [2018-12-02 21:20:56,983 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2018-12-02 21:20:56,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-12-02 21:20:56,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2018-12-02 21:20:56,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-12-02 21:20:56,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2018-12-02 21:20:56,986 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 24 [2018-12-02 21:20:56,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 21:20:56,987 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2018-12-02 21:20:56,987 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-12-02 21:20:56,987 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2018-12-02 21:20:56,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-12-02 21:20:56,987 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 21:20:56,988 INFO L402 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 21:20:56,988 INFO L423 AbstractCegarLoop]: === Iteration 4 === [idErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, idErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-02 21:20:56,988 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 21:20:56,988 INFO L82 PathProgramCache]: Analyzing trace with hash 1480256124, now seen corresponding path program 1 times [2018-12-02 21:20:56,988 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 21:20:56,989 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 21:20:56,989 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 21:20:56,989 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 21:20:56,989 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 21:20:56,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 21:20:57,007 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-12-02 21:20:57,008 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-02 21:20:57,008 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-12-02 21:20:57,008 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-02 21:20:57,008 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-12-02 21:20:57,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-12-02 21:20:57,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-02 21:20:57,008 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 3 states. [2018-12-02 21:20:57,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 21:20:57,012 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2018-12-02 21:20:57,012 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-12-02 21:20:57,013 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2018-12-02 21:20:57,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 21:20:57,013 INFO L225 Difference]: With dead ends: 27 [2018-12-02 21:20:57,013 INFO L226 Difference]: Without dead ends: 26 [2018-12-02 21:20:57,014 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-02 21:20:57,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-12-02 21:20:57,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-12-02 21:20:57,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-12-02 21:20:57,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2018-12-02 21:20:57,016 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 25 [2018-12-02 21:20:57,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 21:20:57,016 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2018-12-02 21:20:57,016 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-12-02 21:20:57,017 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2018-12-02 21:20:57,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-12-02 21:20:57,017 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 21:20:57,017 INFO L402 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 21:20:57,017 INFO L423 AbstractCegarLoop]: === Iteration 5 === [idErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, idErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-02 21:20:57,017 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 21:20:57,017 INFO L82 PathProgramCache]: Analyzing trace with hash 226188295, now seen corresponding path program 1 times [2018-12-02 21:20:57,017 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 21:20:57,018 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 21:20:57,018 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 21:20:57,018 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 21:20:57,018 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 21:20:57,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 21:20:57,038 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-12-02 21:20:57,038 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-02 21:20:57,039 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-12-02 21:20:57,039 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-02 21:20:57,039 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-12-02 21:20:57,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-12-02 21:20:57,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-12-02 21:20:57,039 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand 4 states. [2018-12-02 21:20:57,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 21:20:57,052 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2018-12-02 21:20:57,052 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-12-02 21:20:57,052 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 33 [2018-12-02 21:20:57,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 21:20:57,052 INFO L225 Difference]: With dead ends: 26 [2018-12-02 21:20:57,052 INFO L226 Difference]: Without dead ends: 0 [2018-12-02 21:20:57,053 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-12-02 21:20:57,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-12-02 21:20:57,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-12-02 21:20:57,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-12-02 21:20:57,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-12-02 21:20:57,053 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 33 [2018-12-02 21:20:57,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 21:20:57,053 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-12-02 21:20:57,053 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-12-02 21:20:57,053 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-12-02 21:20:57,053 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-12-02 21:20:57,056 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-12-02 21:20:57,067 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-12-02 21:20:57,067 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-12-02 21:20:57,067 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-12-02 21:20:57,067 INFO L451 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-12-02 21:20:57,067 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-12-02 21:20:57,067 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-12-02 21:20:57,068 INFO L448 ceAbstractionStarter]: For program point L15(line 15) no Hoare annotation was computed. [2018-12-02 21:20:57,068 INFO L448 ceAbstractionStarter]: For program point L14(lines 14 16) no Hoare annotation was computed. [2018-12-02 21:20:57,068 INFO L451 ceAbstractionStarter]: At program point mainENTRY(lines 11 17) the Hoare annotation is: true [2018-12-02 21:20:57,068 INFO L451 ceAbstractionStarter]: At program point L13(line 13) the Hoare annotation is: true [2018-12-02 21:20:57,068 INFO L448 ceAbstractionStarter]: For program point L13-1(line 13) no Hoare annotation was computed. [2018-12-02 21:20:57,068 INFO L448 ceAbstractionStarter]: For program point L14-2(lines 11 17) no Hoare annotation was computed. [2018-12-02 21:20:57,068 INFO L448 ceAbstractionStarter]: For program point mainEXIT(lines 11 17) no Hoare annotation was computed. [2018-12-02 21:20:57,068 INFO L448 ceAbstractionStarter]: For program point idFINAL(lines 4 9) no Hoare annotation was computed. [2018-12-02 21:20:57,068 INFO L448 ceAbstractionStarter]: For program point idErr0ASSERT_VIOLATIONINTEGER_OVERFLOW(line 6) no Hoare annotation was computed. [2018-12-02 21:20:57,068 INFO L448 ceAbstractionStarter]: For program point idErr1ASSERT_VIOLATIONINTEGER_OVERFLOW(line 6) no Hoare annotation was computed. [2018-12-02 21:20:57,068 INFO L448 ceAbstractionStarter]: For program point idEXIT(lines 4 9) no Hoare annotation was computed. [2018-12-02 21:20:57,068 INFO L451 ceAbstractionStarter]: At program point idENTRY(lines 4 9) the Hoare annotation is: true [2018-12-02 21:20:57,068 INFO L448 ceAbstractionStarter]: For program point L7(line 7) no Hoare annotation was computed. [2018-12-02 21:20:57,068 INFO L451 ceAbstractionStarter]: At program point L6(line 6) the Hoare annotation is: true [2018-12-02 21:20:57,068 INFO L448 ceAbstractionStarter]: For program point L5(line 5) no Hoare annotation was computed. [2018-12-02 21:20:57,068 INFO L448 ceAbstractionStarter]: For program point L6-1(line 6) no Hoare annotation was computed. [2018-12-02 21:20:57,069 INFO L448 ceAbstractionStarter]: For program point L6-2(line 6) no Hoare annotation was computed. [2018-12-02 21:20:57,069 INFO L448 ceAbstractionStarter]: For program point L6-3(line 6) no Hoare annotation was computed. [2018-12-02 21:20:57,070 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.12 09:20:57 BoogieIcfgContainer [2018-12-02 21:20:57,070 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-12-02 21:20:57,070 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-12-02 21:20:57,070 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-12-02 21:20:57,070 INFO L276 PluginConnector]: Witness Printer initialized [2018-12-02 21:20:57,071 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 09:20:56" (3/4) ... [2018-12-02 21:20:57,073 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-12-02 21:20:57,076 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-12-02 21:20:57,076 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-12-02 21:20:57,077 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure id [2018-12-02 21:20:57,079 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2018-12-02 21:20:57,079 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2018-12-02 21:20:57,079 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-12-02 21:20:57,102 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_30c4b603-32c7-4b64-842e-2ce1e200535b/bin-2019/utaipan/witness.graphml [2018-12-02 21:20:57,102 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-12-02 21:20:57,103 INFO L168 Benchmark]: Toolchain (without parser) took 1144.68 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 128.5 MB). Free memory was 957.8 MB in the beginning and 985.8 MB in the end (delta: -28.0 MB). Peak memory consumption was 100.5 MB. Max. memory is 11.5 GB. [2018-12-02 21:20:57,103 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 1.0 GB. Free memory is still 978.7 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-02 21:20:57,104 INFO L168 Benchmark]: CACSL2BoogieTranslator took 115.55 ms. Allocated memory is still 1.0 GB. Free memory was 957.8 MB in the beginning and 947.0 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-12-02 21:20:57,104 INFO L168 Benchmark]: Boogie Procedure Inliner took 11.42 ms. Allocated memory is still 1.0 GB. Free memory is still 947.0 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-02 21:20:57,104 INFO L168 Benchmark]: Boogie Preprocessor took 10.22 ms. Allocated memory is still 1.0 GB. Free memory is still 947.0 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-02 21:20:57,104 INFO L168 Benchmark]: RCFGBuilder took 157.82 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 128.5 MB). Free memory was 947.0 MB in the beginning and 1.1 GB in the end (delta: -161.1 MB). Peak memory consumption was 18.5 MB. Max. memory is 11.5 GB. [2018-12-02 21:20:57,105 INFO L168 Benchmark]: TraceAbstraction took 814.84 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 992.7 MB in the end (delta: 115.4 MB). Peak memory consumption was 115.4 MB. Max. memory is 11.5 GB. [2018-12-02 21:20:57,105 INFO L168 Benchmark]: Witness Printer took 31.98 ms. Allocated memory is still 1.2 GB. Free memory was 992.7 MB in the beginning and 985.8 MB in the end (delta: 7.0 MB). Peak memory consumption was 7.0 MB. Max. memory is 11.5 GB. [2018-12-02 21:20:57,106 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 978.7 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 115.55 ms. Allocated memory is still 1.0 GB. Free memory was 957.8 MB in the beginning and 947.0 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 11.42 ms. Allocated memory is still 1.0 GB. Free memory is still 947.0 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 10.22 ms. Allocated memory is still 1.0 GB. Free memory is still 947.0 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 157.82 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 128.5 MB). Free memory was 947.0 MB in the beginning and 1.1 GB in the end (delta: -161.1 MB). Peak memory consumption was 18.5 MB. Max. memory is 11.5 GB. * TraceAbstraction took 814.84 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 992.7 MB in the end (delta: 115.4 MB). Peak memory consumption was 115.4 MB. Max. memory is 11.5 GB. * Witness Printer took 31.98 ms. Allocated memory is still 1.2 GB. Free memory was 992.7 MB in the beginning and 985.8 MB in the end (delta: 7.0 MB). Peak memory consumption was 7.0 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 6]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 6]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 24 locations, 2 error locations. SAFE Result, 0.7s OverallTime, 5 OverallIterations, 4 TraceHistogramMax, 0.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 85 SDtfs, 10 SDslu, 188 SDs, 0 SdLazy, 82 SolverSat, 7 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 67 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=27occurred in iteration=3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.1s AbstIntTime, 1 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 3 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 9 PreInvPairs, 9 NumberOfFragments, 7 HoareAnnotationTreeSize, 9 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 148 NumberOfCodeBlocks, 148 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 165 ConstructedInterpolants, 0 QuantifiedInterpolants, 6245 SizeOfPredicates, 1 NumberOfNonLiveVariables, 56 ConjunctsInSsa, 6 ConjunctsInUnsatCore, 7 InterpolantComputations, 4 PerfectInterpolantSequences, 80/92 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...