./Ultimate.py --spec ../../sv-benchmarks/c/ReachSafety.prp --file ../../sv-benchmarks/c/recursive-simple/id_i5_o5_true-unreach-call_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_a785fe59-2307-455c-97fb-33583221a017/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_a785fe59-2307-455c-97fb-33583221a017/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_a785fe59-2307-455c-97fb-33583221a017/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_a785fe59-2307-455c-97fb-33583221a017/bin-2019/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursive-simple/id_i5_o5_true-unreach-call_true-termination.c -s /tmp/vcloud-vcloud-master/worker/working_dir_a785fe59-2307-455c-97fb-33583221a017/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_a785fe59-2307-455c-97fb-33583221a017/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 e05793781d8e05fe8376a30b6751438f3b1a9d08 ...................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 10:13:15,377 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-18 10:13:15,378 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-18 10:13:15,385 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-18 10:13:15,385 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-18 10:13:15,386 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-18 10:13:15,387 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-18 10:13:15,388 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-18 10:13:15,389 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-18 10:13:15,389 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-18 10:13:15,390 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-18 10:13:15,390 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-18 10:13:15,391 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-18 10:13:15,392 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-18 10:13:15,392 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-18 10:13:15,393 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-18 10:13:15,394 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-18 10:13:15,395 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-18 10:13:15,396 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-18 10:13:15,397 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-18 10:13:15,398 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-18 10:13:15,399 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-18 10:13:15,400 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-18 10:13:15,400 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-18 10:13:15,401 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-18 10:13:15,401 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-18 10:13:15,402 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-18 10:13:15,402 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-18 10:13:15,403 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-18 10:13:15,404 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-18 10:13:15,404 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-18 10:13:15,404 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-18 10:13:15,405 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-18 10:13:15,405 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-18 10:13:15,406 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-18 10:13:15,406 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-18 10:13:15,406 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_a785fe59-2307-455c-97fb-33583221a017/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2018-11-18 10:13:15,416 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-18 10:13:15,417 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-18 10:13:15,417 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-18 10:13:15,417 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-18 10:13:15,418 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-18 10:13:15,418 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-18 10:13:15,418 INFO L133 SettingsManager]: * Explicit value domain=true [2018-11-18 10:13:15,418 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-18 10:13:15,418 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-18 10:13:15,418 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-18 10:13:15,418 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-18 10:13:15,419 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-18 10:13:15,419 INFO L133 SettingsManager]: * Interval Domain=false [2018-11-18 10:13:15,419 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-18 10:13:15,419 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-18 10:13:15,420 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-18 10:13:15,420 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-18 10:13:15,420 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-18 10:13:15,420 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-18 10:13:15,420 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-18 10:13:15,420 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-18 10:13:15,420 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-18 10:13:15,421 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-18 10:13:15,421 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-18 10:13:15,421 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-18 10:13:15,421 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-18 10:13:15,421 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-18 10:13:15,421 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-18 10:13:15,421 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-18 10:13:15,422 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-18 10:13:15,422 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-18 10:13:15,422 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-18 10:13:15,422 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-18 10:13:15,422 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-18 10:13:15,422 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-18 10:13:15,422 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-18 10:13:15,422 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-18 10:13:15,423 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_a785fe59-2307-455c-97fb-33583221a017/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 -> e05793781d8e05fe8376a30b6751438f3b1a9d08 [2018-11-18 10:13:15,444 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-18 10:13:15,453 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-18 10:13:15,455 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-18 10:13:15,456 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-18 10:13:15,456 INFO L276 PluginConnector]: CDTParser initialized [2018-11-18 10:13:15,457 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_a785fe59-2307-455c-97fb-33583221a017/bin-2019/utaipan/../../sv-benchmarks/c/recursive-simple/id_i5_o5_true-unreach-call_true-termination.c [2018-11-18 10:13:15,495 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_a785fe59-2307-455c-97fb-33583221a017/bin-2019/utaipan/data/727242c94/eb0e7acb6af541e2b21b038eb6311a90/FLAG00dacf3a4 [2018-11-18 10:13:15,888 INFO L307 CDTParser]: Found 1 translation units. [2018-11-18 10:13:15,888 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_a785fe59-2307-455c-97fb-33583221a017/sv-benchmarks/c/recursive-simple/id_i5_o5_true-unreach-call_true-termination.c [2018-11-18 10:13:15,891 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_a785fe59-2307-455c-97fb-33583221a017/bin-2019/utaipan/data/727242c94/eb0e7acb6af541e2b21b038eb6311a90/FLAG00dacf3a4 [2018-11-18 10:13:15,901 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_a785fe59-2307-455c-97fb-33583221a017/bin-2019/utaipan/data/727242c94/eb0e7acb6af541e2b21b038eb6311a90 [2018-11-18 10:13:15,902 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-18 10:13:15,903 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-18 10:13:15,904 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-18 10:13:15,904 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-18 10:13:15,906 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-18 10:13:15,906 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 10:13:15" (1/1) ... [2018-11-18 10:13:15,908 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3cf76dfb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 10:13:15, skipping insertion in model container [2018-11-18 10:13:15,908 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 10:13:15" (1/1) ... [2018-11-18 10:13:15,914 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-18 10:13:15,924 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-18 10:13:16,029 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 10:13:16,031 INFO L191 MainTranslator]: Completed pre-run [2018-11-18 10:13:16,039 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 10:13:16,048 INFO L195 MainTranslator]: Completed translation [2018-11-18 10:13:16,049 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 10:13:16 WrapperNode [2018-11-18 10:13:16,049 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-18 10:13:16,049 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-18 10:13:16,049 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-18 10:13:16,050 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-18 10:13:16,055 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 10:13:16" (1/1) ... [2018-11-18 10:13:16,060 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 10:13:16" (1/1) ... [2018-11-18 10:13:16,064 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-18 10:13:16,064 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-18 10:13:16,065 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-18 10:13:16,065 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-18 10:13:16,070 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 10:13:16" (1/1) ... [2018-11-18 10:13:16,071 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 10:13:16" (1/1) ... [2018-11-18 10:13:16,071 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 10:13:16" (1/1) ... [2018-11-18 10:13:16,071 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 10:13:16" (1/1) ... [2018-11-18 10:13:16,073 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 10:13:16" (1/1) ... [2018-11-18 10:13:16,074 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 10:13:16" (1/1) ... [2018-11-18 10:13:16,075 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 10:13:16" (1/1) ... [2018-11-18 10:13:16,076 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-18 10:13:16,076 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-18 10:13:16,076 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-18 10:13:16,077 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-18 10:13:16,077 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 10:13:16" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a785fe59-2307-455c-97fb-33583221a017/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 10:13:16,152 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-18 10:13:16,152 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-18 10:13:16,152 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-18 10:13:16,153 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-18 10:13:16,153 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-18 10:13:16,153 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-18 10:13:16,153 INFO L130 BoogieDeclarations]: Found specification of procedure id [2018-11-18 10:13:16,153 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2018-11-18 10:13:16,244 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-18 10:13:16,244 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 10:13:16 BoogieIcfgContainer [2018-11-18 10:13:16,244 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-18 10:13:16,245 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-18 10:13:16,245 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-18 10:13:16,246 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-18 10:13:16,247 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 10:13:15" (1/3) ... [2018-11-18 10:13:16,247 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48abf667 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 10:13:16, skipping insertion in model container [2018-11-18 10:13:16,247 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 10:13:16" (2/3) ... [2018-11-18 10:13:16,247 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48abf667 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 10:13:16, skipping insertion in model container [2018-11-18 10:13:16,248 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 10:13:16" (3/3) ... [2018-11-18 10:13:16,249 INFO L112 eAbstractionObserver]: Analyzing ICFG id_i5_o5_true-unreach-call_true-termination.c [2018-11-18 10:13:16,255 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-18 10:13:16,259 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-18 10:13:16,269 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-18 10:13:16,289 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-18 10:13:16,289 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-18 10:13:16,289 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-18 10:13:16,289 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-18 10:13:16,289 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-18 10:13:16,289 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-18 10:13:16,289 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-18 10:13:16,290 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-18 10:13:16,306 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2018-11-18 10:13:16,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-11-18 10:13:16,309 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 10:13:16,310 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 10:13:16,311 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 10:13:16,314 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 10:13:16,314 INFO L82 PathProgramCache]: Analyzing trace with hash -872342019, now seen corresponding path program 1 times [2018-11-18 10:13:16,316 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 10:13:16,346 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:13:16,346 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 10:13:16,346 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:13:16,346 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 10:13:16,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 10:13:16,424 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 10:13:16,426 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 10:13:16,426 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-18 10:13:16,426 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 10:13:16,428 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-18 10:13:16,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-18 10:13:16,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-18 10:13:16,438 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2018-11-18 10:13:16,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 10:13:16,487 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2018-11-18 10:13:16,488 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-18 10:13:16,488 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2018-11-18 10:13:16,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 10:13:16,496 INFO L225 Difference]: With dead ends: 30 [2018-11-18 10:13:16,496 INFO L226 Difference]: Without dead ends: 18 [2018-11-18 10:13:16,500 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-11-18 10:13:16,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-11-18 10:13:16,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-11-18 10:13:16,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-11-18 10:13:16,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2018-11-18 10:13:16,528 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2018-11-18 10:13:16,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 10:13:16,528 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2018-11-18 10:13:16,528 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-18 10:13:16,528 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2018-11-18 10:13:16,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-11-18 10:13:16,530 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 10:13:16,530 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 10:13:16,530 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 10:13:16,530 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 10:13:16,530 INFO L82 PathProgramCache]: Analyzing trace with hash -953570577, now seen corresponding path program 1 times [2018-11-18 10:13:16,531 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 10:13:16,531 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:13:16,532 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 10:13:16,532 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:13:16,532 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 10:13:16,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 10:13:16,586 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-18 10:13:16,586 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 10:13:16,586 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 10:13:16,587 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 20 with the following transitions: [2018-11-18 10:13:16,588 INFO L202 CegarAbsIntRunner]: [0], [4], [6], [9], [11], [17], [20], [21], [23], [24], [25], [26], [27], [29], [30], [31], [32] [2018-11-18 10:13:16,611 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-18 10:13:16,611 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-18 10:13:16,708 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-18 10:13:16,709 INFO L272 AbstractInterpreter]: Visited 16 different actions 49 times. Never merged. Widened at 1 different actions 2 times. Performed 105 root evaluator evaluations with a maximum evaluation depth of 3. Performed 105 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 1 fixpoints after 1 different actions. Largest state had 4 variables. [2018-11-18 10:13:16,715 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 10:13:16,715 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-18 10:13:16,758 INFO L227 lantSequenceWeakener]: Weakened 10 states. On average, predicates are now at 58.33% of their original sizes. [2018-11-18 10:13:16,759 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-18 10:13:16,838 INFO L415 sIntCurrentIteration]: We unified 18 AI predicates to 18 [2018-11-18 10:13:16,838 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-18 10:13:16,839 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-18 10:13:16,839 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [12] imperfect sequences [6] total 16 [2018-11-18 10:13:16,839 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 10:13:16,840 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-18 10:13:16,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-18 10:13:16,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2018-11-18 10:13:16,841 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 12 states. [2018-11-18 10:13:17,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 10:13:17,093 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2018-11-18 10:13:17,093 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-18 10:13:17,093 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 19 [2018-11-18 10:13:17,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 10:13:17,094 INFO L225 Difference]: With dead ends: 39 [2018-11-18 10:13:17,094 INFO L226 Difference]: Without dead ends: 30 [2018-11-18 10:13:17,095 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 20 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2018-11-18 10:13:17,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-11-18 10:13:17,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2018-11-18 10:13:17,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-11-18 10:13:17,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2018-11-18 10:13:17,099 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 19 [2018-11-18 10:13:17,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 10:13:17,100 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2018-11-18 10:13:17,100 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-18 10:13:17,100 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2018-11-18 10:13:17,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-11-18 10:13:17,100 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 10:13:17,101 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 10:13:17,101 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 10:13:17,101 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 10:13:17,101 INFO L82 PathProgramCache]: Analyzing trace with hash 397359997, now seen corresponding path program 2 times [2018-11-18 10:13:17,101 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 10:13:17,102 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:13:17,102 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 10:13:17,102 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:13:17,102 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 10:13:17,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 10:13:17,161 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-11-18 10:13:17,161 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 10:13:17,162 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 10:13:17,162 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-18 10:13:17,163 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-18 10:13:17,164 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 10:13:17,164 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a785fe59-2307-455c-97fb-33583221a017/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 10:13:17,170 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-18 10:13:17,170 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-11-18 10:13:17,183 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-11-18 10:13:17,183 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 10:13:17,189 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 10:13:17,218 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-11-18 10:13:17,219 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 10:13:17,513 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-11-18 10:13:17,528 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-18 10:13:17,529 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 9] total 11 [2018-11-18 10:13:17,529 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 10:13:17,529 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-18 10:13:17,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-18 10:13:17,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2018-11-18 10:13:17,530 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand 7 states. [2018-11-18 10:13:17,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 10:13:17,585 INFO L93 Difference]: Finished difference Result 49 states and 52 transitions. [2018-11-18 10:13:17,585 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-18 10:13:17,585 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2018-11-18 10:13:17,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 10:13:17,586 INFO L225 Difference]: With dead ends: 49 [2018-11-18 10:13:17,586 INFO L226 Difference]: Without dead ends: 39 [2018-11-18 10:13:17,587 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 43 SyntacticMatches, 6 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2018-11-18 10:13:17,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-11-18 10:13:17,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 30. [2018-11-18 10:13:17,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-11-18 10:13:17,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2018-11-18 10:13:17,592 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 25 [2018-11-18 10:13:17,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 10:13:17,593 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2018-11-18 10:13:17,593 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-18 10:13:17,593 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2018-11-18 10:13:17,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-11-18 10:13:17,594 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 10:13:17,594 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 10:13:17,594 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 10:13:17,594 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 10:13:17,594 INFO L82 PathProgramCache]: Analyzing trace with hash 1198310127, now seen corresponding path program 3 times [2018-11-18 10:13:17,594 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 10:13:17,595 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:13:17,595 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 10:13:17,595 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:13:17,596 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 10:13:17,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 10:13:17,649 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-11-18 10:13:17,649 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 10:13:17,649 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 10:13:17,649 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-18 10:13:17,650 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-18 10:13:17,650 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 10:13:17,650 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a785fe59-2307-455c-97fb-33583221a017/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 10:13:17,665 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-18 10:13:17,665 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-11-18 10:13:17,671 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-18 10:13:17,671 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 10:13:17,673 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 10:13:17,684 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-11-18 10:13:17,684 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 10:13:17,960 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-11-18 10:13:17,975 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-18 10:13:17,975 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 11] total 13 [2018-11-18 10:13:17,975 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 10:13:17,975 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-18 10:13:17,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-18 10:13:17,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2018-11-18 10:13:17,976 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 8 states. [2018-11-18 10:13:18,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 10:13:18,014 INFO L93 Difference]: Finished difference Result 52 states and 55 transitions. [2018-11-18 10:13:18,016 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-18 10:13:18,016 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2018-11-18 10:13:18,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 10:13:18,017 INFO L225 Difference]: With dead ends: 52 [2018-11-18 10:13:18,017 INFO L226 Difference]: Without dead ends: 42 [2018-11-18 10:13:18,018 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 53 SyntacticMatches, 8 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2018-11-18 10:13:18,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-11-18 10:13:18,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 33. [2018-11-18 10:13:18,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-11-18 10:13:18,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2018-11-18 10:13:18,022 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 31 [2018-11-18 10:13:18,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 10:13:18,022 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2018-11-18 10:13:18,022 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-18 10:13:18,022 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2018-11-18 10:13:18,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-11-18 10:13:18,023 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 10:13:18,023 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 10:13:18,023 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 10:13:18,023 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 10:13:18,023 INFO L82 PathProgramCache]: Analyzing trace with hash 1080764669, now seen corresponding path program 4 times [2018-11-18 10:13:18,023 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 10:13:18,024 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:13:18,024 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 10:13:18,024 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:13:18,024 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 10:13:18,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 10:13:18,069 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2018-11-18 10:13:18,069 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 10:13:18,069 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 10:13:18,075 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-18 10:13:18,076 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-18 10:13:18,076 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 10:13:18,076 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a785fe59-2307-455c-97fb-33583221a017/bin-2019/utaipan/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 10:13:18,084 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 10:13:18,084 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-18 10:13:18,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 10:13:18,097 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 10:13:18,108 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2018-11-18 10:13:18,109 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 10:13:18,529 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-11-18 10:13:18,545 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-18 10:13:18,546 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 13] total 14 [2018-11-18 10:13:18,546 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 10:13:18,546 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-18 10:13:18,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-18 10:13:18,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2018-11-18 10:13:18,547 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 9 states. [2018-11-18 10:13:18,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 10:13:18,596 INFO L93 Difference]: Finished difference Result 55 states and 58 transitions. [2018-11-18 10:13:18,596 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-18 10:13:18,596 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 37 [2018-11-18 10:13:18,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 10:13:18,597 INFO L225 Difference]: With dead ends: 55 [2018-11-18 10:13:18,597 INFO L226 Difference]: Without dead ends: 45 [2018-11-18 10:13:18,598 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 63 SyntacticMatches, 11 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=222, Unknown=0, NotChecked=0, Total=342 [2018-11-18 10:13:18,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-11-18 10:13:18,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 36. [2018-11-18 10:13:18,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-11-18 10:13:18,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2018-11-18 10:13:18,603 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 37 [2018-11-18 10:13:18,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 10:13:18,603 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2018-11-18 10:13:18,603 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-18 10:13:18,603 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2018-11-18 10:13:18,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-11-18 10:13:18,604 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 10:13:18,604 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 10:13:18,604 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 10:13:18,605 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 10:13:18,605 INFO L82 PathProgramCache]: Analyzing trace with hash -1752970513, now seen corresponding path program 5 times [2018-11-18 10:13:18,605 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 10:13:18,605 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:13:18,605 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 10:13:18,605 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:13:18,606 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 10:13:18,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 10:13:18,741 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2018-11-18 10:13:18,741 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 10:13:18,741 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 10:13:18,741 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-18 10:13:18,741 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-18 10:13:18,741 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 10:13:18,741 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a785fe59-2307-455c-97fb-33583221a017/bin-2019/utaipan/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 10:13:18,768 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-18 10:13:18,768 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-11-18 10:13:18,795 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-11-18 10:13:18,795 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 10:13:18,797 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 10:13:18,866 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2018-11-18 10:13:18,866 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 10:13:19,049 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2018-11-18 10:13:19,071 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-18 10:13:19,071 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 15 [2018-11-18 10:13:19,072 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 10:13:19,072 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-11-18 10:13:19,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-11-18 10:13:19,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2018-11-18 10:13:19,072 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 15 states. [2018-11-18 10:13:19,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 10:13:19,140 INFO L93 Difference]: Finished difference Result 58 states and 61 transitions. [2018-11-18 10:13:19,140 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-11-18 10:13:19,140 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 43 [2018-11-18 10:13:19,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 10:13:19,141 INFO L225 Difference]: With dead ends: 58 [2018-11-18 10:13:19,141 INFO L226 Difference]: Without dead ends: 48 [2018-11-18 10:13:19,142 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 83 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2018-11-18 10:13:19,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-11-18 10:13:19,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 39. [2018-11-18 10:13:19,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-11-18 10:13:19,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2018-11-18 10:13:19,149 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 43 [2018-11-18 10:13:19,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 10:13:19,149 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2018-11-18 10:13:19,149 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-11-18 10:13:19,149 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2018-11-18 10:13:19,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-11-18 10:13:19,150 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 10:13:19,150 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 10:13:19,150 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 10:13:19,150 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 10:13:19,150 INFO L82 PathProgramCache]: Analyzing trace with hash -1590630787, now seen corresponding path program 6 times [2018-11-18 10:13:19,150 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 10:13:19,151 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:13:19,153 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 10:13:19,154 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:13:19,154 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 10:13:19,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 10:13:19,234 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2018-11-18 10:13:19,234 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 10:13:19,234 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2018-11-18 10:13:19,234 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 10:13:19,234 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-18 10:13:19,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-18 10:13:19,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2018-11-18 10:13:19,235 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 11 states. [2018-11-18 10:13:19,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 10:13:19,300 INFO L93 Difference]: Finished difference Result 48 states and 51 transitions. [2018-11-18 10:13:19,300 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-18 10:13:19,300 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 49 [2018-11-18 10:13:19,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 10:13:19,300 INFO L225 Difference]: With dead ends: 48 [2018-11-18 10:13:19,301 INFO L226 Difference]: Without dead ends: 0 [2018-11-18 10:13:19,301 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2018-11-18 10:13:19,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-11-18 10:13:19,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-11-18 10:13:19,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-11-18 10:13:19,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-11-18 10:13:19,302 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 49 [2018-11-18 10:13:19,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 10:13:19,302 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-18 10:13:19,302 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-18 10:13:19,302 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-11-18 10:13:19,302 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-11-18 10:13:19,305 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-11-18 10:13:19,329 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-11-18 10:13:19,329 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-11-18 10:13:19,329 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-11-18 10:13:19,329 INFO L428 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-11-18 10:13:19,329 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-11-18 10:13:19,329 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-11-18 10:13:19,329 INFO L428 ceAbstractionStarter]: At program point mainENTRY(lines 9 15) the Hoare annotation is: true [2018-11-18 10:13:19,329 INFO L425 ceAbstractionStarter]: For program point mainEXIT(lines 9 15) no Hoare annotation was computed. [2018-11-18 10:13:19,329 INFO L425 ceAbstractionStarter]: For program point L13(line 13) no Hoare annotation was computed. [2018-11-18 10:13:19,329 INFO L425 ceAbstractionStarter]: For program point L12(lines 12 14) no Hoare annotation was computed. [2018-11-18 10:13:19,329 INFO L421 ceAbstractionStarter]: At program point L11(line 11) the Hoare annotation is: (= main_~input~0 5) [2018-11-18 10:13:19,330 INFO L425 ceAbstractionStarter]: For program point L11-1(line 11) no Hoare annotation was computed. [2018-11-18 10:13:19,330 INFO L425 ceAbstractionStarter]: For program point L12-2(lines 9 15) no Hoare annotation was computed. [2018-11-18 10:13:19,330 INFO L425 ceAbstractionStarter]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 13) no Hoare annotation was computed. [2018-11-18 10:13:19,330 INFO L425 ceAbstractionStarter]: For program point idFINAL(lines 4 7) no Hoare annotation was computed. [2018-11-18 10:13:19,330 INFO L425 ceAbstractionStarter]: For program point idEXIT(lines 4 7) no Hoare annotation was computed. [2018-11-18 10:13:19,330 INFO L428 ceAbstractionStarter]: At program point idENTRY(lines 4 7) the Hoare annotation is: true [2018-11-18 10:13:19,330 INFO L421 ceAbstractionStarter]: At program point L6(line 6) the Hoare annotation is: (and (<= |id_#in~x| id_~x) (<= id_~x |id_#in~x|)) [2018-11-18 10:13:19,330 INFO L425 ceAbstractionStarter]: For program point L5(line 5) no Hoare annotation was computed. [2018-11-18 10:13:19,330 INFO L425 ceAbstractionStarter]: For program point L6-1(line 6) no Hoare annotation was computed. [2018-11-18 10:13:19,332 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.11 10:13:19 BoogieIcfgContainer [2018-11-18 10:13:19,332 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-18 10:13:19,332 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-18 10:13:19,332 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-18 10:13:19,332 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-18 10:13:19,333 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 10:13:16" (3/4) ... [2018-11-18 10:13:19,335 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-11-18 10:13:19,338 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-11-18 10:13:19,339 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-11-18 10:13:19,339 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure id [2018-11-18 10:13:19,341 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2018-11-18 10:13:19,341 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2018-11-18 10:13:19,341 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-11-18 10:13:19,365 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_a785fe59-2307-455c-97fb-33583221a017/bin-2019/utaipan/witness.graphml [2018-11-18 10:13:19,365 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-18 10:13:19,366 INFO L168 Benchmark]: Toolchain (without parser) took 3462.89 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 216.5 MB). Free memory was 959.3 MB in the beginning and 960.1 MB in the end (delta: -822.8 kB). Peak memory consumption was 215.7 MB. Max. memory is 11.5 GB. [2018-11-18 10:13:19,367 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 1.0 GB. Free memory is still 985.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 10:13:19,367 INFO L168 Benchmark]: CACSL2BoogieTranslator took 145.24 ms. Allocated memory is still 1.0 GB. Free memory was 959.3 MB in the beginning and 948.5 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-11-18 10:13:19,367 INFO L168 Benchmark]: Boogie Procedure Inliner took 14.98 ms. Allocated memory is still 1.0 GB. Free memory is still 948.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 10:13:19,368 INFO L168 Benchmark]: Boogie Preprocessor took 11.45 ms. Allocated memory is still 1.0 GB. Free memory was 948.5 MB in the beginning and 945.8 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2018-11-18 10:13:19,368 INFO L168 Benchmark]: RCFGBuilder took 168.10 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 147.8 MB). Free memory was 945.8 MB in the beginning and 1.1 GB in the end (delta: -191.3 MB). Peak memory consumption was 19.7 MB. Max. memory is 11.5 GB. [2018-11-18 10:13:19,368 INFO L168 Benchmark]: TraceAbstraction took 3087.28 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 68.7 MB). Free memory was 1.1 GB in the beginning and 960.1 MB in the end (delta: 173.6 MB). Peak memory consumption was 242.3 MB. Max. memory is 11.5 GB. [2018-11-18 10:13:19,369 INFO L168 Benchmark]: Witness Printer took 33.05 ms. Allocated memory is still 1.2 GB. Free memory is still 960.1 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 10:13:19,371 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 ms. Allocated memory is still 1.0 GB. Free memory is still 985.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 145.24 ms. Allocated memory is still 1.0 GB. Free memory was 959.3 MB in the beginning and 948.5 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 14.98 ms. Allocated memory is still 1.0 GB. Free memory is still 948.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 11.45 ms. Allocated memory is still 1.0 GB. Free memory was 948.5 MB in the beginning and 945.8 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 168.10 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 147.8 MB). Free memory was 945.8 MB in the beginning and 1.1 GB in the end (delta: -191.3 MB). Peak memory consumption was 19.7 MB. Max. memory is 11.5 GB. * TraceAbstraction took 3087.28 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 68.7 MB). Free memory was 1.1 GB in the beginning and 960.1 MB in the end (delta: 173.6 MB). Peak memory consumption was 242.3 MB. Max. memory is 11.5 GB. * Witness Printer took 33.05 ms. Allocated memory is still 1.2 GB. Free memory is still 960.1 MB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 13]: 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, 20 locations, 1 error locations. SAFE Result, 3.0s OverallTime, 7 OverallIterations, 7 TraceHistogramMax, 0.6s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 121 SDtfs, 69 SDslu, 677 SDs, 0 SdLazy, 291 SolverSat, 10 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 2 DeclaredPredicates, 378 GetRequests, 260 SyntacticMatches, 29 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=39occurred in iteration=6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.1s AbstIntTime, 1 AbstIntIterations, 1 AbstIntStrong, 0.6944444444444444 AbsIntWeakeningRatio, 0.5555555555555556 AbsIntAvgWeakeningVarsNumRemoved, 0.8333333333333334 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 7 MinimizatonAttempts, 38 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 13 PreInvPairs, 13 NumberOfFragments, 15 HoareAnnotationTreeSize, 13 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 43 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 1.7s InterpolantComputationTime, 353 NumberOfCodeBlocks, 349 NumberOfCodeBlocksAsserted, 18 NumberOfCheckSat, 474 ConstructedInterpolants, 0 QuantifiedInterpolants, 47664 SizeOfPredicates, 16 NumberOfNonLiveVariables, 304 ConjunctsInSsa, 57 ConjunctsInUnsatCore, 15 InterpolantComputations, 2 PerfectInterpolantSequences, 351/646 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...