./Ultimate.py --spec ../../sv-benchmarks/c/ReachSafety.prp --file ../../sv-benchmarks/c/recursive-simple/sum_15x0_true-unreach-call_true-termination.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 1dbac8bc Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_5be44b59-ab23-414e-a9a3-554910050633/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_5be44b59-ab23-414e-a9a3-554910050633/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_5be44b59-ab23-414e-a9a3-554910050633/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_5be44b59-ab23-414e-a9a3-554910050633/bin-2019/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursive-simple/sum_15x0_true-unreach-call_true-termination.c -s /tmp/vcloud-vcloud-master/worker/working_dir_5be44b59-ab23-414e-a9a3-554910050633/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_5be44b59-ab23-414e-a9a3-554910050633/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 7f140b11074e684b22c263036fee9fde5b4c087a ....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-1dbac8b [2018-11-10 05:15:05,377 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-10 05:15:05,378 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-10 05:15:05,385 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-10 05:15:05,386 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-10 05:15:05,386 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-10 05:15:05,387 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-10 05:15:05,389 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-10 05:15:05,390 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-10 05:15:05,391 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-10 05:15:05,391 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-10 05:15:05,391 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-10 05:15:05,392 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-10 05:15:05,393 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-10 05:15:05,393 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-10 05:15:05,394 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-10 05:15:05,394 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-10 05:15:05,396 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-10 05:15:05,397 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-10 05:15:05,398 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-10 05:15:05,399 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-10 05:15:05,400 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-10 05:15:05,402 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-10 05:15:05,402 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-10 05:15:05,402 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-10 05:15:05,403 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-10 05:15:05,403 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-10 05:15:05,404 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-10 05:15:05,404 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-10 05:15:05,405 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-10 05:15:05,405 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-10 05:15:05,406 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-10 05:15:05,406 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-10 05:15:05,406 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-10 05:15:05,407 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-10 05:15:05,407 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-10 05:15:05,408 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_5be44b59-ab23-414e-a9a3-554910050633/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2018-11-10 05:15:05,416 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-10 05:15:05,416 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-10 05:15:05,417 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-10 05:15:05,417 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-10 05:15:05,417 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-10 05:15:05,417 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-10 05:15:05,418 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-10 05:15:05,418 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-10 05:15:05,418 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-10 05:15:05,418 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-10 05:15:05,418 INFO L133 SettingsManager]: * Interval Domain=false [2018-11-10 05:15:05,419 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-10 05:15:05,419 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-10 05:15:05,419 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-10 05:15:05,419 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-10 05:15:05,419 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-10 05:15:05,419 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-10 05:15:05,420 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-10 05:15:05,420 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-10 05:15:05,420 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-10 05:15:05,420 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-10 05:15:05,420 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-10 05:15:05,420 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-10 05:15:05,421 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-10 05:15:05,421 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-10 05:15:05,421 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-10 05:15:05,421 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-10 05:15:05,421 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-10 05:15:05,421 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-10 05:15:05,421 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-10 05:15:05,422 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-10 05:15:05,422 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-10 05:15:05,422 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-10 05:15:05,422 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-10 05:15:05,422 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_5be44b59-ab23-414e-a9a3-554910050633/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 -> 7f140b11074e684b22c263036fee9fde5b4c087a [2018-11-10 05:15:05,448 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-10 05:15:05,458 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-10 05:15:05,461 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-10 05:15:05,464 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-10 05:15:05,464 INFO L276 PluginConnector]: CDTParser initialized [2018-11-10 05:15:05,465 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_5be44b59-ab23-414e-a9a3-554910050633/bin-2019/utaipan/../../sv-benchmarks/c/recursive-simple/sum_15x0_true-unreach-call_true-termination.c [2018-11-10 05:15:05,515 INFO L218 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_5be44b59-ab23-414e-a9a3-554910050633/bin-2019/utaipan/data/da7ca3073/7fbb2e28947d49f6b121d7ca52f04e09/FLAG631cc5760 [2018-11-10 05:15:05,861 INFO L298 CDTParser]: Found 1 translation units. [2018-11-10 05:15:05,861 INFO L158 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_5be44b59-ab23-414e-a9a3-554910050633/sv-benchmarks/c/recursive-simple/sum_15x0_true-unreach-call_true-termination.c [2018-11-10 05:15:05,866 INFO L346 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_5be44b59-ab23-414e-a9a3-554910050633/bin-2019/utaipan/data/da7ca3073/7fbb2e28947d49f6b121d7ca52f04e09/FLAG631cc5760 [2018-11-10 05:15:05,877 INFO L354 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_5be44b59-ab23-414e-a9a3-554910050633/bin-2019/utaipan/data/da7ca3073/7fbb2e28947d49f6b121d7ca52f04e09 [2018-11-10 05:15:05,880 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-10 05:15:05,881 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-10 05:15:05,882 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-10 05:15:05,882 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-10 05:15:05,886 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-10 05:15:05,887 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 05:15:05" (1/1) ... [2018-11-10 05:15:05,889 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@133164ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 05:15:05, skipping insertion in model container [2018-11-10 05:15:05,890 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 05:15:05" (1/1) ... [2018-11-10 05:15:05,900 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-10 05:15:05,916 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-10 05:15:06,022 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-10 05:15:06,026 INFO L189 MainTranslator]: Completed pre-run [2018-11-10 05:15:06,036 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-10 05:15:06,045 INFO L193 MainTranslator]: Completed translation [2018-11-10 05:15:06,045 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 05:15:06 WrapperNode [2018-11-10 05:15:06,045 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-10 05:15:06,046 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-10 05:15:06,046 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-10 05:15:06,046 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-10 05:15:06,052 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 05:15:06" (1/1) ... [2018-11-10 05:15:06,055 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 05:15:06" (1/1) ... [2018-11-10 05:15:06,060 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-10 05:15:06,060 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-10 05:15:06,060 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-10 05:15:06,060 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-10 05:15:06,068 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 05:15:06" (1/1) ... [2018-11-10 05:15:06,068 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 05:15:06" (1/1) ... [2018-11-10 05:15:06,069 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 05:15:06" (1/1) ... [2018-11-10 05:15:06,069 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 05:15:06" (1/1) ... [2018-11-10 05:15:06,071 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 05:15:06" (1/1) ... [2018-11-10 05:15:06,072 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 05:15:06" (1/1) ... [2018-11-10 05:15:06,073 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 05:15:06" (1/1) ... [2018-11-10 05:15:06,074 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-10 05:15:06,074 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-10 05:15:06,074 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-10 05:15:06,074 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-10 05:15:06,075 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 05:15:06" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5be44b59-ab23-414e-a9a3-554910050633/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 [2018-11-10 05:15:06,159 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-10 05:15:06,159 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-10 05:15:06,160 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-10 05:15:06,160 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-10 05:15:06,160 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-10 05:15:06,160 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-10 05:15:06,160 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2018-11-10 05:15:06,160 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2018-11-10 05:15:06,255 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-10 05:15:06,256 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.11 05:15:06 BoogieIcfgContainer [2018-11-10 05:15:06,256 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-10 05:15:06,256 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-10 05:15:06,256 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-10 05:15:06,258 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-10 05:15:06,259 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.11 05:15:05" (1/3) ... [2018-11-10 05:15:06,259 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39f5b2d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 05:15:06, skipping insertion in model container [2018-11-10 05:15:06,259 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 05:15:06" (2/3) ... [2018-11-10 05:15:06,260 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39f5b2d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 05:15:06, skipping insertion in model container [2018-11-10 05:15:06,260 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.11 05:15:06" (3/3) ... [2018-11-10 05:15:06,261 INFO L112 eAbstractionObserver]: Analyzing ICFG sum_15x0_true-unreach-call_true-termination.c [2018-11-10 05:15:06,268 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-10 05:15:06,274 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-10 05:15:06,289 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-10 05:15:06,311 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-10 05:15:06,311 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-10 05:15:06,312 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-10 05:15:06,312 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-10 05:15:06,312 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-10 05:15:06,312 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-10 05:15:06,312 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-10 05:15:06,312 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-10 05:15:06,327 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2018-11-10 05:15:06,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-11-10 05:15:06,332 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 05:15:06,333 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 05:15:06,335 INFO L424 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 05:15:06,340 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 05:15:06,340 INFO L82 PathProgramCache]: Analyzing trace with hash -872342019, now seen corresponding path program 1 times [2018-11-10 05:15:06,342 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-10 05:15:06,383 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:15:06,383 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 05:15:06,384 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:15:06,384 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-10 05:15:06,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 05:15:06,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 05:15:06,486 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 05:15:06,486 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-10 05:15:06,487 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-10 05:15:06,490 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-10 05:15:06,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-10 05:15:06,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-10 05:15:06,502 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2018-11-10 05:15:06,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 05:15:06,572 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2018-11-10 05:15:06,572 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-10 05:15:06,573 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2018-11-10 05:15:06,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 05:15:06,581 INFO L225 Difference]: With dead ends: 30 [2018-11-10 05:15:06,581 INFO L226 Difference]: Without dead ends: 18 [2018-11-10 05:15:06,583 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-11-10 05:15:06,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-11-10 05:15:06,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-11-10 05:15:06,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-11-10 05:15:06,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2018-11-10 05:15:06,615 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2018-11-10 05:15:06,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 05:15:06,616 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2018-11-10 05:15:06,616 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-10 05:15:06,616 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2018-11-10 05:15:06,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-11-10 05:15:06,618 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 05:15:06,618 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 05:15:06,618 INFO L424 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 05:15:06,618 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 05:15:06,619 INFO L82 PathProgramCache]: Analyzing trace with hash -953570577, now seen corresponding path program 1 times [2018-11-10 05:15:06,619 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-10 05:15:06,620 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:15:06,620 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 05:15:06,620 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:15:06,620 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-10 05:15:06,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 05:15:06,678 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-10 05:15:06,679 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 05:15:06,679 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-10 05:15:06,680 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 20 with the following transitions: [2018-11-10 05:15:06,681 INFO L202 CegarAbsIntRunner]: [0], [4], [6], [9], [11], [17], [20], [21], [23], [24], [25], [26], [27], [29], [30], [31], [32] [2018-11-10 05:15:06,715 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-11-10 05:15:06,715 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-10 05:15:06,911 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-10 05:15:06,912 INFO L272 AbstractInterpreter]: Visited 17 different actions 71 times. Never merged. Widened at 1 different actions 5 times. Found 1 fixpoints after 1 different actions. Largest state had 6 variables. [2018-11-10 05:15:06,926 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 05:15:06,927 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-10 05:15:06,927 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 05:15:06,927 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5be44b59-ab23-414e-a9a3-554910050633/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 [2018-11-10 05:15:06,936 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 05:15:06,937 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-10 05:15:06,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 05:15:06,959 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 05:15:06,987 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-10 05:15:06,987 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 05:15:07,148 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-11-10 05:15:07,179 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-10 05:15:07,179 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7] total 9 [2018-11-10 05:15:07,179 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-10 05:15:07,180 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-10 05:15:07,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-10 05:15:07,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2018-11-10 05:15:07,181 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 6 states. [2018-11-10 05:15:07,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 05:15:07,232 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2018-11-10 05:15:07,232 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-10 05:15:07,232 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2018-11-10 05:15:07,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 05:15:07,233 INFO L225 Difference]: With dead ends: 25 [2018-11-10 05:15:07,233 INFO L226 Difference]: Without dead ends: 21 [2018-11-10 05:15:07,234 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 33 SyntacticMatches, 4 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2018-11-10 05:15:07,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-11-10 05:15:07,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-11-10 05:15:07,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-11-10 05:15:07,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-11-10 05:15:07,237 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2018-11-10 05:15:07,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 05:15:07,237 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2018-11-10 05:15:07,237 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-10 05:15:07,237 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2018-11-10 05:15:07,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-11-10 05:15:07,238 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 05:15:07,238 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 05:15:07,238 INFO L424 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 05:15:07,238 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 05:15:07,238 INFO L82 PathProgramCache]: Analyzing trace with hash 397359997, now seen corresponding path program 2 times [2018-11-10 05:15:07,238 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-10 05:15:07,239 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:15:07,239 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 05:15:07,239 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:15:07,239 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-10 05:15:07,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 05:15:07,306 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-11-10 05:15:07,306 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 05:15:07,306 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-10 05:15:07,306 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-10 05:15:07,306 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-10 05:15:07,306 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 05:15:07,306 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5be44b59-ab23-414e-a9a3-554910050633/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 [2018-11-10 05:15:07,314 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-10 05:15:07,314 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-11-10 05:15:07,327 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-11-10 05:15:07,327 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 05:15:07,330 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 05:15:07,343 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-11-10 05:15:07,343 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 05:15:07,585 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-11-10 05:15:07,602 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-10 05:15:07,602 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 9] total 11 [2018-11-10 05:15:07,602 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-10 05:15:07,603 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-10 05:15:07,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-10 05:15:07,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2018-11-10 05:15:07,604 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 7 states. [2018-11-10 05:15:07,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 05:15:07,666 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2018-11-10 05:15:07,666 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-10 05:15:07,666 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2018-11-10 05:15:07,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 05:15:07,667 INFO L225 Difference]: With dead ends: 28 [2018-11-10 05:15:07,668 INFO L226 Difference]: Without dead ends: 24 [2018-11-10 05:15:07,668 INFO L605 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 [2018-11-10 05:15:07,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-11-10 05:15:07,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-11-10 05:15:07,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-11-10 05:15:07,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2018-11-10 05:15:07,674 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 25 [2018-11-10 05:15:07,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 05:15:07,674 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2018-11-10 05:15:07,674 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-10 05:15:07,674 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2018-11-10 05:15:07,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-11-10 05:15:07,675 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 05:15:07,675 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 05:15:07,676 INFO L424 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 05:15:07,676 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 05:15:07,676 INFO L82 PathProgramCache]: Analyzing trace with hash 1198310127, now seen corresponding path program 3 times [2018-11-10 05:15:07,676 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-10 05:15:07,677 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:15:07,677 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 05:15:07,677 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:15:07,677 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-10 05:15:07,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 05:15:07,753 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-11-10 05:15:07,753 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 05:15:07,753 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-10 05:15:07,753 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-10 05:15:07,754 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-10 05:15:07,754 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 05:15:07,754 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5be44b59-ab23-414e-a9a3-554910050633/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 [2018-11-10 05:15:07,766 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-10 05:15:07,766 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-11-10 05:15:07,783 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-10 05:15:07,783 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 05:15:07,785 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 05:15:07,799 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-11-10 05:15:07,799 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 05:15:08,121 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-11-10 05:15:08,138 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-10 05:15:08,138 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 11] total 13 [2018-11-10 05:15:08,138 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-10 05:15:08,139 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-10 05:15:08,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-10 05:15:08,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2018-11-10 05:15:08,139 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 8 states. [2018-11-10 05:15:08,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 05:15:08,180 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2018-11-10 05:15:08,181 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-10 05:15:08,181 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2018-11-10 05:15:08,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 05:15:08,182 INFO L225 Difference]: With dead ends: 31 [2018-11-10 05:15:08,182 INFO L226 Difference]: Without dead ends: 27 [2018-11-10 05:15:08,182 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 53 SyntacticMatches, 8 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2018-11-10 05:15:08,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-11-10 05:15:08,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-11-10 05:15:08,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-11-10 05:15:08,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2018-11-10 05:15:08,186 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 31 [2018-11-10 05:15:08,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 05:15:08,186 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2018-11-10 05:15:08,187 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-10 05:15:08,187 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2018-11-10 05:15:08,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-11-10 05:15:08,188 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 05:15:08,188 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 05:15:08,188 INFO L424 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 05:15:08,189 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 05:15:08,189 INFO L82 PathProgramCache]: Analyzing trace with hash 1080764669, now seen corresponding path program 4 times [2018-11-10 05:15:08,189 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-10 05:15:08,189 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:15:08,189 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 05:15:08,190 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:15:08,190 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-10 05:15:08,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 05:15:08,247 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2018-11-10 05:15:08,247 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 05:15:08,247 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-10 05:15:08,248 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-10 05:15:08,248 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-10 05:15:08,248 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 05:15:08,248 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5be44b59-ab23-414e-a9a3-554910050633/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 [2018-11-10 05:15:08,261 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 05:15:08,261 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-10 05:15:08,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 05:15:08,274 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 05:15:08,283 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2018-11-10 05:15:08,283 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 05:15:08,763 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-11-10 05:15:08,780 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-10 05:15:08,780 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 13] total 15 [2018-11-10 05:15:08,780 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-10 05:15:08,780 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-10 05:15:08,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-10 05:15:08,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2018-11-10 05:15:08,781 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 9 states. [2018-11-10 05:15:08,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 05:15:08,831 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2018-11-10 05:15:08,831 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-10 05:15:08,831 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 37 [2018-11-10 05:15:08,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 05:15:08,832 INFO L225 Difference]: With dead ends: 34 [2018-11-10 05:15:08,832 INFO L226 Difference]: Without dead ends: 30 [2018-11-10 05:15:08,833 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 63 SyntacticMatches, 10 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=123, Invalid=257, Unknown=0, NotChecked=0, Total=380 [2018-11-10 05:15:08,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-11-10 05:15:08,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-11-10 05:15:08,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-11-10 05:15:08,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2018-11-10 05:15:08,838 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 37 [2018-11-10 05:15:08,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 05:15:08,838 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2018-11-10 05:15:08,838 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-10 05:15:08,838 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2018-11-10 05:15:08,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-11-10 05:15:08,839 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 05:15:08,840 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 05:15:08,840 INFO L424 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 05:15:08,840 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 05:15:08,840 INFO L82 PathProgramCache]: Analyzing trace with hash -1752970513, now seen corresponding path program 5 times [2018-11-10 05:15:08,840 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-10 05:15:08,841 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:15:08,841 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 05:15:08,842 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:15:08,842 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-10 05:15:08,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 05:15:08,914 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2018-11-10 05:15:08,914 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 05:15:08,914 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-10 05:15:08,914 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-10 05:15:08,914 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-10 05:15:08,914 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 05:15:08,914 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5be44b59-ab23-414e-a9a3-554910050633/bin-2019/utaipan/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 05:15:08,921 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-10 05:15:08,921 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-11-10 05:15:08,945 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-11-10 05:15:08,946 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 05:15:08,948 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 05:15:08,959 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2018-11-10 05:15:08,959 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 05:15:09,678 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-11-10 05:15:09,696 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-10 05:15:09,696 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 15] total 17 [2018-11-10 05:15:09,696 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-10 05:15:09,697 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-10 05:15:09,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-10 05:15:09,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2018-11-10 05:15:09,697 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 10 states. [2018-11-10 05:15:09,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 05:15:09,762 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2018-11-10 05:15:09,762 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-10 05:15:09,762 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 43 [2018-11-10 05:15:09,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 05:15:09,763 INFO L225 Difference]: With dead ends: 37 [2018-11-10 05:15:09,763 INFO L226 Difference]: Without dead ends: 33 [2018-11-10 05:15:09,764 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 73 SyntacticMatches, 12 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=164, Invalid=342, Unknown=0, NotChecked=0, Total=506 [2018-11-10 05:15:09,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-11-10 05:15:09,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-11-10 05:15:09,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-11-10 05:15:09,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2018-11-10 05:15:09,770 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 43 [2018-11-10 05:15:09,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 05:15:09,770 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2018-11-10 05:15:09,771 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-10 05:15:09,771 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2018-11-10 05:15:09,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-11-10 05:15:09,771 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 05:15:09,772 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 05:15:09,772 INFO L424 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 05:15:09,772 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 05:15:09,772 INFO L82 PathProgramCache]: Analyzing trace with hash -1590630787, now seen corresponding path program 6 times [2018-11-10 05:15:09,772 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-10 05:15:09,773 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:15:09,773 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 05:15:09,773 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:15:09,773 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-10 05:15:09,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 05:15:09,843 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2018-11-10 05:15:09,843 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 05:15:09,843 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-10 05:15:09,843 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-10 05:15:09,843 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-10 05:15:09,843 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 05:15:09,843 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5be44b59-ab23-414e-a9a3-554910050633/bin-2019/utaipan/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 05:15:09,850 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-10 05:15:09,850 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-11-10 05:15:09,885 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-10 05:15:09,885 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 05:15:09,887 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 05:15:09,908 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2018-11-10 05:15:09,908 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 05:15:10,815 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 93 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-11-10 05:15:10,844 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-10 05:15:10,844 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 17] total 19 [2018-11-10 05:15:10,844 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-10 05:15:10,845 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-10 05:15:10,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-10 05:15:10,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2018-11-10 05:15:10,846 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 11 states. [2018-11-10 05:15:10,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 05:15:10,923 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2018-11-10 05:15:10,924 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-10 05:15:10,924 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 49 [2018-11-10 05:15:10,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 05:15:10,925 INFO L225 Difference]: With dead ends: 40 [2018-11-10 05:15:10,925 INFO L226 Difference]: Without dead ends: 36 [2018-11-10 05:15:10,926 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 83 SyntacticMatches, 14 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=211, Invalid=439, Unknown=0, NotChecked=0, Total=650 [2018-11-10 05:15:10,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-11-10 05:15:10,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-11-10 05:15:10,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-11-10 05:15:10,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2018-11-10 05:15:10,932 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 49 [2018-11-10 05:15:10,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 05:15:10,933 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2018-11-10 05:15:10,933 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-10 05:15:10,933 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2018-11-10 05:15:10,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-11-10 05:15:10,934 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 05:15:10,934 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 05:15:10,934 INFO L424 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 05:15:10,934 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 05:15:10,934 INFO L82 PathProgramCache]: Analyzing trace with hash 1532150511, now seen corresponding path program 7 times [2018-11-10 05:15:10,934 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-10 05:15:10,935 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:15:10,935 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 05:15:10,935 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:15:10,936 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-10 05:15:10,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 05:15:11,006 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2018-11-10 05:15:11,006 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 05:15:11,006 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-10 05:15:11,006 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-10 05:15:11,006 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-10 05:15:11,006 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 05:15:11,007 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5be44b59-ab23-414e-a9a3-554910050633/bin-2019/utaipan/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 05:15:11,013 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 05:15:11,013 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-10 05:15:11,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 05:15:11,029 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 05:15:11,038 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2018-11-10 05:15:11,038 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 05:15:12,343 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2018-11-10 05:15:12,361 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-10 05:15:12,362 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 19] total 21 [2018-11-10 05:15:12,362 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-10 05:15:12,362 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-10 05:15:12,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-10 05:15:12,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=308, Unknown=0, NotChecked=0, Total=420 [2018-11-10 05:15:12,363 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 12 states. [2018-11-10 05:15:12,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 05:15:12,458 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2018-11-10 05:15:12,459 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-10 05:15:12,459 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 55 [2018-11-10 05:15:12,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 05:15:12,460 INFO L225 Difference]: With dead ends: 43 [2018-11-10 05:15:12,460 INFO L226 Difference]: Without dead ends: 39 [2018-11-10 05:15:12,460 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 93 SyntacticMatches, 16 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=264, Invalid=548, Unknown=0, NotChecked=0, Total=812 [2018-11-10 05:15:12,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-11-10 05:15:12,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-11-10 05:15:12,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-11-10 05:15:12,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2018-11-10 05:15:12,465 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 55 [2018-11-10 05:15:12,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 05:15:12,465 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2018-11-10 05:15:12,465 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-10 05:15:12,465 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2018-11-10 05:15:12,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-11-10 05:15:12,466 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 05:15:12,466 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 05:15:12,466 INFO L424 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 05:15:12,466 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 05:15:12,467 INFO L82 PathProgramCache]: Analyzing trace with hash 1140618237, now seen corresponding path program 8 times [2018-11-10 05:15:12,467 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-10 05:15:12,467 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:15:12,467 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 05:15:12,467 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:15:12,468 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-10 05:15:12,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 05:15:12,547 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2018-11-10 05:15:12,547 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 05:15:12,547 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-10 05:15:12,547 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-10 05:15:12,547 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-10 05:15:12,547 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 05:15:12,548 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5be44b59-ab23-414e-a9a3-554910050633/bin-2019/utaipan/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 05:15:12,554 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-10 05:15:12,554 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-11-10 05:15:12,572 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-11-10 05:15:12,572 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 05:15:12,574 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 05:15:12,586 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2018-11-10 05:15:12,587 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 05:15:14,286 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 164 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2018-11-10 05:15:14,316 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-10 05:15:14,316 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 21] total 23 [2018-11-10 05:15:14,316 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-10 05:15:14,317 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-11-10 05:15:14,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-11-10 05:15:14,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2018-11-10 05:15:14,318 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 13 states. [2018-11-10 05:15:14,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 05:15:14,417 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2018-11-10 05:15:14,417 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-11-10 05:15:14,417 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 61 [2018-11-10 05:15:14,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 05:15:14,418 INFO L225 Difference]: With dead ends: 46 [2018-11-10 05:15:14,418 INFO L226 Difference]: Without dead ends: 42 [2018-11-10 05:15:14,419 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 103 SyntacticMatches, 18 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=323, Invalid=669, Unknown=0, NotChecked=0, Total=992 [2018-11-10 05:15:14,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-11-10 05:15:14,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-11-10 05:15:14,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-11-10 05:15:14,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2018-11-10 05:15:14,424 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 61 [2018-11-10 05:15:14,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 05:15:14,425 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2018-11-10 05:15:14,425 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-11-10 05:15:14,425 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2018-11-10 05:15:14,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-11-10 05:15:14,426 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 05:15:14,426 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 05:15:14,426 INFO L424 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 05:15:14,426 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 05:15:14,426 INFO L82 PathProgramCache]: Analyzing trace with hash -1749177617, now seen corresponding path program 9 times [2018-11-10 05:15:14,426 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-10 05:15:14,427 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:15:14,427 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 05:15:14,427 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:15:14,427 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-10 05:15:14,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 05:15:14,513 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2018-11-10 05:15:14,513 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 05:15:14,513 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-10 05:15:14,513 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-10 05:15:14,513 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-10 05:15:14,513 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 05:15:14,513 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5be44b59-ab23-414e-a9a3-554910050633/bin-2019/utaipan/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 05:15:14,520 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-10 05:15:14,520 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-11-10 05:15:14,536 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-10 05:15:14,536 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 05:15:14,538 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 05:15:14,549 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2018-11-10 05:15:14,549 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 05:15:16,850 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 207 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2018-11-10 05:15:16,869 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-10 05:15:16,869 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 23] total 25 [2018-11-10 05:15:16,869 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-10 05:15:16,869 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-11-10 05:15:16,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-11-10 05:15:16,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=442, Unknown=0, NotChecked=0, Total=600 [2018-11-10 05:15:16,870 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 14 states. [2018-11-10 05:15:16,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 05:15:16,959 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2018-11-10 05:15:16,959 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-11-10 05:15:16,959 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 67 [2018-11-10 05:15:16,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 05:15:16,960 INFO L225 Difference]: With dead ends: 49 [2018-11-10 05:15:16,960 INFO L226 Difference]: Without dead ends: 45 [2018-11-10 05:15:16,961 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 113 SyntacticMatches, 20 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=388, Invalid=802, Unknown=0, NotChecked=0, Total=1190 [2018-11-10 05:15:16,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-11-10 05:15:16,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-11-10 05:15:16,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-11-10 05:15:16,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2018-11-10 05:15:16,966 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 67 [2018-11-10 05:15:16,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 05:15:16,966 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2018-11-10 05:15:16,966 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-11-10 05:15:16,966 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2018-11-10 05:15:16,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-11-10 05:15:16,967 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 05:15:16,967 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 05:15:16,968 INFO L424 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 05:15:16,968 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 05:15:16,968 INFO L82 PathProgramCache]: Analyzing trace with hash -1580609155, now seen corresponding path program 10 times [2018-11-10 05:15:16,968 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-10 05:15:16,969 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:15:16,969 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 05:15:16,969 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:15:16,969 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-10 05:15:16,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 05:15:17,083 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2018-11-10 05:15:17,083 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 05:15:17,083 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-10 05:15:17,083 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-10 05:15:17,083 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-10 05:15:17,083 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 05:15:17,083 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5be44b59-ab23-414e-a9a3-554910050633/bin-2019/utaipan/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 05:15:17,095 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 05:15:17,095 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-10 05:15:17,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 05:15:17,116 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 05:15:17,131 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2018-11-10 05:15:17,131 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 05:15:20,006 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 255 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2018-11-10 05:15:20,024 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-10 05:15:20,025 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 25] total 27 [2018-11-10 05:15:20,025 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-10 05:15:20,025 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-11-10 05:15:20,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-11-10 05:15:20,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=518, Unknown=0, NotChecked=0, Total=702 [2018-11-10 05:15:20,026 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 15 states. [2018-11-10 05:15:20,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 05:15:20,140 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2018-11-10 05:15:20,140 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-11-10 05:15:20,140 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 73 [2018-11-10 05:15:20,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 05:15:20,141 INFO L225 Difference]: With dead ends: 52 [2018-11-10 05:15:20,141 INFO L226 Difference]: Without dead ends: 48 [2018-11-10 05:15:20,142 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 123 SyntacticMatches, 22 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=459, Invalid=947, Unknown=0, NotChecked=0, Total=1406 [2018-11-10 05:15:20,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-11-10 05:15:20,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-11-10 05:15:20,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-11-10 05:15:20,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2018-11-10 05:15:20,145 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 73 [2018-11-10 05:15:20,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 05:15:20,146 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2018-11-10 05:15:20,146 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-11-10 05:15:20,146 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2018-11-10 05:15:20,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-11-10 05:15:20,147 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 05:15:20,147 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 05:15:20,147 INFO L424 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 05:15:20,147 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 05:15:20,147 INFO L82 PathProgramCache]: Analyzing trace with hash -223837457, now seen corresponding path program 11 times [2018-11-10 05:15:20,148 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-10 05:15:20,148 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:15:20,148 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 05:15:20,148 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:15:20,148 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-10 05:15:20,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 05:15:20,262 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2018-11-10 05:15:20,263 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 05:15:20,263 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-10 05:15:20,263 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-10 05:15:20,263 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-10 05:15:20,263 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 05:15:20,263 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5be44b59-ab23-414e-a9a3-554910050633/bin-2019/utaipan/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 05:15:20,271 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-10 05:15:20,271 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-11-10 05:15:20,294 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-11-10 05:15:20,295 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 05:15:20,297 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 05:15:20,307 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2018-11-10 05:15:20,307 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 05:15:24,041 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 308 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2018-11-10 05:15:24,059 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-10 05:15:24,059 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 27] total 29 [2018-11-10 05:15:24,059 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-10 05:15:24,059 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-11-10 05:15:24,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-11-10 05:15:24,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=600, Unknown=0, NotChecked=0, Total=812 [2018-11-10 05:15:24,060 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 16 states. [2018-11-10 05:15:24,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 05:15:24,214 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2018-11-10 05:15:24,214 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-11-10 05:15:24,214 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 79 [2018-11-10 05:15:24,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 05:15:24,215 INFO L225 Difference]: With dead ends: 55 [2018-11-10 05:15:24,215 INFO L226 Difference]: Without dead ends: 51 [2018-11-10 05:15:24,215 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 133 SyntacticMatches, 24 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=536, Invalid=1104, Unknown=0, NotChecked=0, Total=1640 [2018-11-10 05:15:24,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-11-10 05:15:24,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-11-10 05:15:24,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-11-10 05:15:24,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2018-11-10 05:15:24,219 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 79 [2018-11-10 05:15:24,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 05:15:24,219 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2018-11-10 05:15:24,219 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-11-10 05:15:24,219 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2018-11-10 05:15:24,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2018-11-10 05:15:24,220 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 05:15:24,220 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 05:15:24,220 INFO L424 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 05:15:24,220 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 05:15:24,221 INFO L82 PathProgramCache]: Analyzing trace with hash 1653931773, now seen corresponding path program 12 times [2018-11-10 05:15:24,221 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-10 05:15:24,221 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:15:24,221 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 05:15:24,221 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:15:24,222 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-10 05:15:24,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 05:15:24,316 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2018-11-10 05:15:24,316 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 05:15:24,316 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-10 05:15:24,316 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-10 05:15:24,316 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-10 05:15:24,316 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 05:15:24,316 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5be44b59-ab23-414e-a9a3-554910050633/bin-2019/utaipan/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 05:15:24,324 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-10 05:15:24,325 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-11-10 05:15:24,344 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-10 05:15:24,344 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 05:15:24,346 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 05:15:24,360 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2018-11-10 05:15:24,361 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 05:15:29,227 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 366 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2018-11-10 05:15:29,257 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-10 05:15:29,257 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 29] total 31 [2018-11-10 05:15:29,257 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-10 05:15:29,258 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-11-10 05:15:29,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-11-10 05:15:29,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=688, Unknown=0, NotChecked=0, Total=930 [2018-11-10 05:15:29,258 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 17 states. [2018-11-10 05:15:29,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 05:15:29,425 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2018-11-10 05:15:29,425 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-11-10 05:15:29,425 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 85 [2018-11-10 05:15:29,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 05:15:29,426 INFO L225 Difference]: With dead ends: 58 [2018-11-10 05:15:29,426 INFO L226 Difference]: Without dead ends: 54 [2018-11-10 05:15:29,427 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 143 SyntacticMatches, 26 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 494 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=619, Invalid=1273, Unknown=0, NotChecked=0, Total=1892 [2018-11-10 05:15:29,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-11-10 05:15:29,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2018-11-10 05:15:29,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-11-10 05:15:29,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2018-11-10 05:15:29,431 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 85 [2018-11-10 05:15:29,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 05:15:29,432 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2018-11-10 05:15:29,432 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-11-10 05:15:29,432 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2018-11-10 05:15:29,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2018-11-10 05:15:29,433 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 05:15:29,433 INFO L375 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 05:15:29,433 INFO L424 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 05:15:29,433 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 05:15:29,433 INFO L82 PathProgramCache]: Analyzing trace with hash -218674449, now seen corresponding path program 13 times [2018-11-10 05:15:29,433 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-10 05:15:29,434 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:15:29,434 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 05:15:29,434 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:15:29,434 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-10 05:15:29,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 05:15:29,601 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2018-11-10 05:15:29,601 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 05:15:29,601 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-10 05:15:29,601 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-10 05:15:29,601 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-10 05:15:29,601 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 05:15:29,601 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5be44b59-ab23-414e-a9a3-554910050633/bin-2019/utaipan/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 05:15:29,608 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 05:15:29,608 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-10 05:15:29,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 05:15:29,630 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 05:15:29,648 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2018-11-10 05:15:29,648 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 05:15:35,633 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 429 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2018-11-10 05:15:35,650 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-10 05:15:35,651 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 31] total 33 [2018-11-10 05:15:35,651 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-10 05:15:35,651 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-11-10 05:15:35,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-11-10 05:15:35,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=274, Invalid=782, Unknown=0, NotChecked=0, Total=1056 [2018-11-10 05:15:35,652 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 18 states. [2018-11-10 05:15:35,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 05:15:35,797 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2018-11-10 05:15:35,797 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-11-10 05:15:35,797 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 91 [2018-11-10 05:15:35,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 05:15:35,798 INFO L225 Difference]: With dead ends: 61 [2018-11-10 05:15:35,798 INFO L226 Difference]: Without dead ends: 57 [2018-11-10 05:15:35,799 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 153 SyntacticMatches, 28 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 574 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=708, Invalid=1454, Unknown=0, NotChecked=0, Total=2162 [2018-11-10 05:15:35,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-11-10 05:15:35,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-11-10 05:15:35,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-11-10 05:15:35,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2018-11-10 05:15:35,802 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 91 [2018-11-10 05:15:35,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 05:15:35,803 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2018-11-10 05:15:35,803 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-11-10 05:15:35,803 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2018-11-10 05:15:35,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-11-10 05:15:35,804 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 05:15:35,804 INFO L375 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 05:15:35,804 INFO L424 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 05:15:35,805 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 05:15:35,805 INFO L82 PathProgramCache]: Analyzing trace with hash 492436605, now seen corresponding path program 14 times [2018-11-10 05:15:35,805 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-10 05:15:35,805 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:15:35,805 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 05:15:35,806 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:15:35,806 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-10 05:15:35,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 05:15:35,976 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2018-11-10 05:15:35,976 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 05:15:35,976 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-10 05:15:35,976 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-10 05:15:35,976 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-10 05:15:35,976 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 05:15:35,976 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5be44b59-ab23-414e-a9a3-554910050633/bin-2019/utaipan/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 05:15:35,983 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-10 05:15:35,983 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-11-10 05:15:36,021 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-11-10 05:15:36,021 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 05:15:36,023 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 05:15:36,037 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2018-11-10 05:15:36,038 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 05:15:43,220 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 497 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2018-11-10 05:15:43,238 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-10 05:15:43,238 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 33] total 34 [2018-11-10 05:15:43,238 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-10 05:15:43,238 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-11-10 05:15:43,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-11-10 05:15:43,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=817, Unknown=0, NotChecked=0, Total=1122 [2018-11-10 05:15:43,239 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 19 states. [2018-11-10 05:15:43,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 05:15:43,461 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2018-11-10 05:15:43,461 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-11-10 05:15:43,461 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 97 [2018-11-10 05:15:43,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 05:15:43,462 INFO L225 Difference]: With dead ends: 64 [2018-11-10 05:15:43,462 INFO L226 Difference]: Without dead ends: 60 [2018-11-10 05:15:43,463 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 163 SyntacticMatches, 31 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=800, Invalid=1552, Unknown=0, NotChecked=0, Total=2352 [2018-11-10 05:15:43,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-11-10 05:15:43,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2018-11-10 05:15:43,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-11-10 05:15:43,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2018-11-10 05:15:43,467 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 97 [2018-11-10 05:15:43,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 05:15:43,469 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2018-11-10 05:15:43,469 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-11-10 05:15:43,469 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2018-11-10 05:15:43,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2018-11-10 05:15:43,470 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 05:15:43,470 INFO L375 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 05:15:43,471 INFO L424 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 05:15:43,471 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 05:15:43,471 INFO L82 PathProgramCache]: Analyzing trace with hash 1083048687, now seen corresponding path program 15 times [2018-11-10 05:15:43,471 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-10 05:15:43,471 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:15:43,472 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 05:15:43,472 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:15:43,472 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-10 05:15:43,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 05:15:44,228 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 374 refuted. 0 times theorem prover too weak. 316 trivial. 0 not checked. [2018-11-10 05:15:44,228 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 05:15:44,228 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-10 05:15:44,228 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-10 05:15:44,228 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-10 05:15:44,228 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 05:15:44,228 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5be44b59-ab23-414e-a9a3-554910050633/bin-2019/utaipan/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 05:15:44,235 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-10 05:15:44,235 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-11-10 05:15:44,263 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-10 05:15:44,263 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 05:15:44,268 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 05:15:44,449 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 690 trivial. 0 not checked. [2018-11-10 05:15:44,449 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 05:15:47,855 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 690 trivial. 0 not checked. [2018-11-10 05:15:47,872 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-11-10 05:15:47,872 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [39] total 43 [2018-11-10 05:15:47,872 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-10 05:15:47,873 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-10 05:15:47,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-10 05:15:47,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=1720, Unknown=0, NotChecked=0, Total=1806 [2018-11-10 05:15:47,873 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 7 states. [2018-11-10 05:15:47,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 05:15:47,937 INFO L93 Difference]: Finished difference Result 60 states and 61 transitions. [2018-11-10 05:15:47,937 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-10 05:15:47,937 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 103 [2018-11-10 05:15:47,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 05:15:47,938 INFO L225 Difference]: With dead ends: 60 [2018-11-10 05:15:47,938 INFO L226 Difference]: Without dead ends: 0 [2018-11-10 05:15:47,939 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 212 SyntacticMatches, 5 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=100, Invalid=1880, Unknown=0, NotChecked=0, Total=1980 [2018-11-10 05:15:47,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-11-10 05:15:47,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-11-10 05:15:47,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-11-10 05:15:47,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-11-10 05:15:47,940 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 103 [2018-11-10 05:15:47,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 05:15:47,940 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-10 05:15:47,940 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-10 05:15:47,940 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-11-10 05:15:47,940 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-11-10 05:15:47,943 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-11-10 05:15:47,960 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-11-10 05:15:47,960 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-11-10 05:15:47,960 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-11-10 05:15:47,960 INFO L428 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-11-10 05:15:47,960 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-11-10 05:15:47,960 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-11-10 05:15:47,960 INFO L428 ceAbstractionStarter]: At program point mainENTRY(lines 11 18) the Hoare annotation is: true [2018-11-10 05:15:47,960 INFO L425 ceAbstractionStarter]: For program point mainEXIT(lines 11 18) no Hoare annotation was computed. [2018-11-10 05:15:47,960 INFO L425 ceAbstractionStarter]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 16) no Hoare annotation was computed. [2018-11-10 05:15:47,961 INFO L425 ceAbstractionStarter]: For program point L16(line 16) no Hoare annotation was computed. [2018-11-10 05:15:47,961 INFO L425 ceAbstractionStarter]: For program point L15(lines 15 17) no Hoare annotation was computed. [2018-11-10 05:15:47,961 INFO L421 ceAbstractionStarter]: At program point L14(line 14) the Hoare annotation is: (<= 15 main_~a~0) [2018-11-10 05:15:47,961 INFO L425 ceAbstractionStarter]: For program point L14-1(line 14) no Hoare annotation was computed. [2018-11-10 05:15:47,961 INFO L425 ceAbstractionStarter]: For program point L15-2(lines 11 18) no Hoare annotation was computed. [2018-11-10 05:15:47,961 INFO L425 ceAbstractionStarter]: For program point sumEXIT(lines 3 9) no Hoare annotation was computed. [2018-11-10 05:15:47,961 INFO L421 ceAbstractionStarter]: At program point L7(line 7) the Hoare annotation is: (and (= sum_~m |sum_#in~m|) (= sum_~n |sum_#in~n|)) [2018-11-10 05:15:47,961 INFO L425 ceAbstractionStarter]: For program point L7-1(line 7) no Hoare annotation was computed. [2018-11-10 05:15:47,961 INFO L425 ceAbstractionStarter]: For program point L4(lines 4 8) no Hoare annotation was computed. [2018-11-10 05:15:47,967 INFO L425 ceAbstractionStarter]: For program point sumFINAL(lines 3 9) no Hoare annotation was computed. [2018-11-10 05:15:47,967 INFO L428 ceAbstractionStarter]: At program point sumENTRY(lines 3 9) the Hoare annotation is: true [2018-11-10 05:15:47,969 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.11 05:15:47 BoogieIcfgContainer [2018-11-10 05:15:47,969 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-10 05:15:47,970 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-10 05:15:47,970 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-10 05:15:47,970 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-10 05:15:47,970 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.11 05:15:06" (3/4) ... [2018-11-10 05:15:47,974 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-11-10 05:15:47,978 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-11-10 05:15:47,978 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-11-10 05:15:47,978 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure sum [2018-11-10 05:15:47,981 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2018-11-10 05:15:47,981 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2018-11-10 05:15:47,981 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-11-10 05:15:48,015 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_5be44b59-ab23-414e-a9a3-554910050633/bin-2019/utaipan/witness.graphml [2018-11-10 05:15:48,015 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-10 05:15:48,016 INFO L168 Benchmark]: Toolchain (without parser) took 42135.87 ms. Allocated memory was 1.0 GB in the beginning and 1.8 GB in the end (delta: 727.7 MB). Free memory was 960.3 MB in the beginning and 1.4 GB in the end (delta: -487.3 MB). Peak memory consumption was 240.4 MB. Max. memory is 11.5 GB. [2018-11-10 05:15:48,017 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 985.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-10 05:15:48,018 INFO L168 Benchmark]: CACSL2BoogieTranslator took 163.70 ms. Allocated memory is still 1.0 GB. Free memory was 960.3 MB in the beginning and 949.5 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.9 MB. Max. memory is 11.5 GB. [2018-11-10 05:15:48,018 INFO L168 Benchmark]: Boogie Procedure Inliner took 13.92 ms. Allocated memory is still 1.0 GB. Free memory is still 949.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-10 05:15:48,018 INFO L168 Benchmark]: Boogie Preprocessor took 13.93 ms. Allocated memory is still 1.0 GB. Free memory is still 949.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-10 05:15:48,018 INFO L168 Benchmark]: RCFGBuilder took 181.53 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 157.8 MB). Free memory was 949.5 MB in the beginning and 1.1 GB in the end (delta: -197.8 MB). Peak memory consumption was 22.5 MB. Max. memory is 11.5 GB. [2018-11-10 05:15:48,019 INFO L168 Benchmark]: TraceAbstraction took 41713.06 ms. Allocated memory was 1.2 GB in the beginning and 1.8 GB in the end (delta: 569.9 MB). Free memory was 1.1 GB in the beginning and 1.4 GB in the end (delta: -303.8 MB). Peak memory consumption was 266.1 MB. Max. memory is 11.5 GB. [2018-11-10 05:15:48,019 INFO L168 Benchmark]: Witness Printer took 45.95 ms. Allocated memory is still 1.8 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-10 05:15:48,021 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 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 163.70 ms. Allocated memory is still 1.0 GB. Free memory was 960.3 MB in the beginning and 949.5 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.9 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 13.92 ms. Allocated memory is still 1.0 GB. Free memory is still 949.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 13.93 ms. Allocated memory is still 1.0 GB. Free memory is still 949.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 181.53 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 157.8 MB). Free memory was 949.5 MB in the beginning and 1.1 GB in the end (delta: -197.8 MB). Peak memory consumption was 22.5 MB. Max. memory is 11.5 GB. * TraceAbstraction took 41713.06 ms. Allocated memory was 1.2 GB in the beginning and 1.8 GB in the end (delta: 569.9 MB). Free memory was 1.1 GB in the beginning and 1.4 GB in the end (delta: -303.8 MB). Peak memory consumption was 266.1 MB. Max. memory is 11.5 GB. * Witness Printer took 45.95 ms. Allocated memory is still 1.8 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 16]: 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, 41.6s OverallTime, 16 OverallIterations, 16 TraceHistogramMax, 1.6s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 192 SDtfs, 320 SDslu, 1203 SDs, 0 SdLazy, 957 SolverSat, 20 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2275 GetRequests, 1586 SyntacticMatches, 244 SemanticMatches, 445 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3563 ImplicationChecksByTransitivity, 4.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=60occurred in iteration=15, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.2s AbstIntTime, 1 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 16 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 9 PreInvPairs, 9 NumberOfFragments, 15 HoareAnnotationTreeSize, 9 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 3 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 38.5s InterpolantComputationTime, 1843 NumberOfCodeBlocks, 1843 NumberOfCodeBlocksAsserted, 76 NumberOfCheckSat, 2712 ConstructedInterpolants, 0 QuantifiedInterpolants, 644778 SizeOfPredicates, 170 NumberOfNonLiveVariables, 2700 ConjunctsInSsa, 461 ConjunctsInUnsatCore, 46 InterpolantComputations, 3 PerfectInterpolantSequences, 5406/11520 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...