./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive/Fibonacci02_true-unreach-call_true-no-overflow_true-termination.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 635dfa2a Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_d67d784d-410d-4beb-b6c6-df1e0a770e8f/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_d67d784d-410d-4beb-b6c6-df1e0a770e8f/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_d67d784d-410d-4beb-b6c6-df1e0a770e8f/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_d67d784d-410d-4beb-b6c6-df1e0a770e8f/bin-2019/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursive/Fibonacci02_true-unreach-call_true-no-overflow_true-termination.c -s /tmp/vcloud-vcloud-master/worker/working_dir_d67d784d-410d-4beb-b6c6-df1e0a770e8f/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_d67d784d-410d-4beb-b6c6-df1e0a770e8f/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 7e40a98558d0111ea95f3ee60a44cc14c7768182 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-635dfa2 [2018-12-08 20:24:28,439 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-08 20:24:28,440 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-08 20:24:28,446 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-08 20:24:28,446 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-08 20:24:28,447 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-08 20:24:28,448 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-08 20:24:28,448 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-08 20:24:28,449 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-08 20:24:28,450 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-08 20:24:28,450 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-08 20:24:28,450 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-08 20:24:28,451 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-08 20:24:28,451 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-08 20:24:28,451 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-08 20:24:28,452 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-08 20:24:28,452 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-08 20:24:28,453 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-08 20:24:28,454 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-08 20:24:28,454 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-08 20:24:28,455 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-08 20:24:28,456 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-08 20:24:28,457 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-12-08 20:24:28,457 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-08 20:24:28,457 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-08 20:24:28,457 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-08 20:24:28,458 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-08 20:24:28,458 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-08 20:24:28,458 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-08 20:24:28,459 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-08 20:24:28,459 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-08 20:24:28,459 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-08 20:24:28,459 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-08 20:24:28,459 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-08 20:24:28,460 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-08 20:24:28,460 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-08 20:24:28,460 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_d67d784d-410d-4beb-b6c6-df1e0a770e8f/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2018-12-08 20:24:28,467 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-08 20:24:28,467 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-08 20:24:28,468 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-08 20:24:28,468 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-12-08 20:24:28,468 INFO L133 SettingsManager]: * User list type=DISABLED [2018-12-08 20:24:28,468 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-12-08 20:24:28,468 INFO L133 SettingsManager]: * Explicit value domain=true [2018-12-08 20:24:28,468 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-12-08 20:24:28,468 INFO L133 SettingsManager]: * Octagon Domain=false [2018-12-08 20:24:28,468 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-12-08 20:24:28,468 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-12-08 20:24:28,468 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-12-08 20:24:28,468 INFO L133 SettingsManager]: * Interval Domain=false [2018-12-08 20:24:28,469 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-08 20:24:28,469 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-08 20:24:28,469 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-08 20:24:28,469 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-08 20:24:28,469 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-08 20:24:28,469 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-12-08 20:24:28,469 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-08 20:24:28,469 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-12-08 20:24:28,469 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-08 20:24:28,469 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-08 20:24:28,469 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-12-08 20:24:28,470 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-08 20:24:28,470 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-08 20:24:28,470 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-12-08 20:24:28,470 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-08 20:24:28,470 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-08 20:24:28,470 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-08 20:24:28,470 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-08 20:24:28,470 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-12-08 20:24:28,470 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-12-08 20:24:28,470 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-08 20:24:28,470 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-12-08 20:24:28,470 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-12-08 20:24:28,471 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_d67d784d-410d-4beb-b6c6-df1e0a770e8f/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 -> 7e40a98558d0111ea95f3ee60a44cc14c7768182 [2018-12-08 20:24:28,488 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-08 20:24:28,498 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-08 20:24:28,500 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-08 20:24:28,501 INFO L271 PluginConnector]: Initializing CDTParser... [2018-12-08 20:24:28,502 INFO L276 PluginConnector]: CDTParser initialized [2018-12-08 20:24:28,502 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_d67d784d-410d-4beb-b6c6-df1e0a770e8f/bin-2019/utaipan/../../sv-benchmarks/c/recursive/Fibonacci02_true-unreach-call_true-no-overflow_true-termination.c [2018-12-08 20:24:28,540 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_d67d784d-410d-4beb-b6c6-df1e0a770e8f/bin-2019/utaipan/data/a18aef733/fe119330e6364bc5b2ff1c15a0dc71bd/FLAG37da0e224 [2018-12-08 20:24:28,848 INFO L307 CDTParser]: Found 1 translation units. [2018-12-08 20:24:28,849 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_d67d784d-410d-4beb-b6c6-df1e0a770e8f/sv-benchmarks/c/recursive/Fibonacci02_true-unreach-call_true-no-overflow_true-termination.c [2018-12-08 20:24:28,852 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_d67d784d-410d-4beb-b6c6-df1e0a770e8f/bin-2019/utaipan/data/a18aef733/fe119330e6364bc5b2ff1c15a0dc71bd/FLAG37da0e224 [2018-12-08 20:24:29,263 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_d67d784d-410d-4beb-b6c6-df1e0a770e8f/bin-2019/utaipan/data/a18aef733/fe119330e6364bc5b2ff1c15a0dc71bd [2018-12-08 20:24:29,265 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-08 20:24:29,266 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-12-08 20:24:29,266 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-12-08 20:24:29,267 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-12-08 20:24:29,268 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-12-08 20:24:29,269 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.12 08:24:29" (1/1) ... [2018-12-08 20:24:29,271 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@37ab3c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 08:24:29, skipping insertion in model container [2018-12-08 20:24:29,271 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.12 08:24:29" (1/1) ... [2018-12-08 20:24:29,275 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-12-08 20:24:29,283 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-12-08 20:24:29,363 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-08 20:24:29,366 INFO L191 MainTranslator]: Completed pre-run [2018-12-08 20:24:29,374 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-08 20:24:29,381 INFO L195 MainTranslator]: Completed translation [2018-12-08 20:24:29,382 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 08:24:29 WrapperNode [2018-12-08 20:24:29,382 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-12-08 20:24:29,382 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-08 20:24:29,382 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-08 20:24:29,382 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-08 20:24:29,387 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 08:24:29" (1/1) ... [2018-12-08 20:24:29,390 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 08:24:29" (1/1) ... [2018-12-08 20:24:29,394 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-08 20:24:29,394 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-08 20:24:29,394 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-08 20:24:29,394 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-08 20:24:29,399 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 08:24:29" (1/1) ... [2018-12-08 20:24:29,399 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 08:24:29" (1/1) ... [2018-12-08 20:24:29,400 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 08:24:29" (1/1) ... [2018-12-08 20:24:29,400 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 08:24:29" (1/1) ... [2018-12-08 20:24:29,402 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 08:24:29" (1/1) ... [2018-12-08 20:24:29,403 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 08:24:29" (1/1) ... [2018-12-08 20:24:29,403 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 08:24:29" (1/1) ... [2018-12-08 20:24:29,404 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-08 20:24:29,404 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-08 20:24:29,404 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-08 20:24:29,404 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-08 20:24:29,405 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 08:24:29" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d67d784d-410d-4beb-b6c6-df1e0a770e8f/bin-2019/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-08 20:24:29,472 INFO L130 BoogieDeclarations]: Found specification of procedure fibonacci [2018-12-08 20:24:29,472 INFO L138 BoogieDeclarations]: Found implementation of procedure fibonacci [2018-12-08 20:24:29,472 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-12-08 20:24:29,473 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-12-08 20:24:29,473 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-08 20:24:29,473 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-08 20:24:29,473 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-12-08 20:24:29,473 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-12-08 20:24:29,555 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-08 20:24:29,556 INFO L280 CfgBuilder]: Removed 0 assue(true) statements. [2018-12-08 20:24:29,556 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.12 08:24:29 BoogieIcfgContainer [2018-12-08 20:24:29,556 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-08 20:24:29,556 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-08 20:24:29,556 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-08 20:24:29,558 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-08 20:24:29,558 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.12 08:24:29" (1/3) ... [2018-12-08 20:24:29,559 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5611a2c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.12 08:24:29, skipping insertion in model container [2018-12-08 20:24:29,559 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 08:24:29" (2/3) ... [2018-12-08 20:24:29,559 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5611a2c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.12 08:24:29, skipping insertion in model container [2018-12-08 20:24:29,559 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.12 08:24:29" (3/3) ... [2018-12-08 20:24:29,560 INFO L112 eAbstractionObserver]: Analyzing ICFG Fibonacci02_true-unreach-call_true-no-overflow_true-termination.c [2018-12-08 20:24:29,566 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-08 20:24:29,571 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-12-08 20:24:29,580 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-12-08 20:24:29,599 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-08 20:24:29,599 INFO L383 AbstractCegarLoop]: Hoare is true [2018-12-08 20:24:29,599 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-08 20:24:29,599 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-08 20:24:29,599 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-08 20:24:29,599 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-08 20:24:29,599 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-08 20:24:29,599 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-08 20:24:29,609 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2018-12-08 20:24:29,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-12-08 20:24:29,613 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 20:24:29,613 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 20:24:29,614 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 20:24:29,617 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 20:24:29,618 INFO L82 PathProgramCache]: Analyzing trace with hash -1356498376, now seen corresponding path program 1 times [2018-12-08 20:24:29,619 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-08 20:24:29,647 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 20:24:29,647 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 20:24:29,647 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 20:24:29,647 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-08 20:24:29,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 20:24:29,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 20:24:29,711 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-08 20:24:29,711 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-12-08 20:24:29,711 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-08 20:24:29,714 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-08 20:24:29,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-08 20:24:29,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-08 20:24:29,723 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 5 states. [2018-12-08 20:24:29,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 20:24:29,784 INFO L93 Difference]: Finished difference Result 33 states and 39 transitions. [2018-12-08 20:24:29,784 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-08 20:24:29,785 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2018-12-08 20:24:29,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 20:24:29,791 INFO L225 Difference]: With dead ends: 33 [2018-12-08 20:24:29,791 INFO L226 Difference]: Without dead ends: 21 [2018-12-08 20:24:29,793 INFO L631 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 [2018-12-08 20:24:29,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-12-08 20:24:29,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-12-08 20:24:29,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-12-08 20:24:29,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2018-12-08 20:24:29,818 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 13 [2018-12-08 20:24:29,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 20:24:29,818 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2018-12-08 20:24:29,818 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-08 20:24:29,818 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2018-12-08 20:24:29,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-12-08 20:24:29,819 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 20:24:29,819 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 20:24:29,819 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 20:24:29,820 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 20:24:29,820 INFO L82 PathProgramCache]: Analyzing trace with hash 1591396412, now seen corresponding path program 1 times [2018-12-08 20:24:29,820 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-08 20:24:29,820 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 20:24:29,820 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 20:24:29,820 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 20:24:29,820 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-08 20:24:29,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 20:24:29,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 20:24:29,849 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-08 20:24:29,849 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-12-08 20:24:29,849 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-08 20:24:29,850 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-08 20:24:29,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-08 20:24:29,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-08 20:24:29,850 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 5 states. [2018-12-08 20:24:29,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 20:24:29,889 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2018-12-08 20:24:29,889 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-08 20:24:29,890 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2018-12-08 20:24:29,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 20:24:29,890 INFO L225 Difference]: With dead ends: 27 [2018-12-08 20:24:29,890 INFO L226 Difference]: Without dead ends: 23 [2018-12-08 20:24:29,891 INFO L631 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 [2018-12-08 20:24:29,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-12-08 20:24:29,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2018-12-08 20:24:29,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-12-08 20:24:29,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2018-12-08 20:24:29,894 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 14 [2018-12-08 20:24:29,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 20:24:29,895 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2018-12-08 20:24:29,895 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-08 20:24:29,895 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2018-12-08 20:24:29,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-12-08 20:24:29,895 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 20:24:29,895 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 20:24:29,896 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 20:24:29,896 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 20:24:29,896 INFO L82 PathProgramCache]: Analyzing trace with hash -1761048597, now seen corresponding path program 1 times [2018-12-08 20:24:29,896 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-08 20:24:29,896 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 20:24:29,896 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 20:24:29,897 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 20:24:29,897 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-08 20:24:29,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 20:24:29,931 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-12-08 20:24:29,931 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 20:24:29,931 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-08 20:24:29,931 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 27 with the following transitions: [2018-12-08 20:24:29,933 INFO L205 CegarAbsIntRunner]: [0], [3], [4], [8], [10], [12], [13], [14], [18], [20], [24], [26], [29], [30], [31], [32], [33], [34], [35], [37], [38] [2018-12-08 20:24:29,953 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-08 20:24:29,953 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-08 20:24:30,251 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-12-08 20:24:30,253 INFO L272 AbstractInterpreter]: Visited 17 different actions 915 times. Never merged. Widened at 2 different actions 83 times. Performed 1943 root evaluator evaluations with a maximum evaluation depth of 4. Performed 1943 inverse root evaluator evaluations with a maximum inverse evaluation depth of 4. Found 89 fixpoints after 3 different actions. Largest state had 5 variables. [2018-12-08 20:24:30,262 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 20:24:30,262 INFO L401 sIntCurrentIteration]: Generating AbsInt predicates [2018-12-08 20:24:30,284 INFO L227 lantSequenceWeakener]: Weakened 4 states. On average, predicates are now at 50% of their original sizes. [2018-12-08 20:24:30,284 INFO L416 sIntCurrentIteration]: Unifying AI predicates [2018-12-08 20:24:30,305 INFO L418 sIntCurrentIteration]: We unified 25 AI predicates to 25 [2018-12-08 20:24:30,305 INFO L427 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-12-08 20:24:30,306 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-12-08 20:24:30,306 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [6] total 11 [2018-12-08 20:24:30,306 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-08 20:24:30,307 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-12-08 20:24:30,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-12-08 20:24:30,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-12-08 20:24:30,307 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 7 states. [2018-12-08 20:24:30,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 20:24:30,415 INFO L93 Difference]: Finished difference Result 54 states and 72 transitions. [2018-12-08 20:24:30,415 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-08 20:24:30,416 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 26 [2018-12-08 20:24:30,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 20:24:30,417 INFO L225 Difference]: With dead ends: 54 [2018-12-08 20:24:30,417 INFO L226 Difference]: Without dead ends: 39 [2018-12-08 20:24:30,417 INFO L631 BasicCegarLoop]: 2 DeclaredPredicates, 27 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2018-12-08 20:24:30,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-12-08 20:24:30,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2018-12-08 20:24:30,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-12-08 20:24:30,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2018-12-08 20:24:30,424 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 26 [2018-12-08 20:24:30,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 20:24:30,424 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2018-12-08 20:24:30,425 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-12-08 20:24:30,425 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2018-12-08 20:24:30,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-12-08 20:24:30,426 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 20:24:30,426 INFO L402 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 20:24:30,426 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 20:24:30,427 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 20:24:30,427 INFO L82 PathProgramCache]: Analyzing trace with hash 246499846, now seen corresponding path program 2 times [2018-12-08 20:24:30,427 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-08 20:24:30,428 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 20:24:30,428 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 20:24:30,428 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 20:24:30,428 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-08 20:24:30,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 20:24:30,476 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 14 proven. 8 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2018-12-08 20:24:30,476 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 20:24:30,476 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-08 20:24:30,476 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-08 20:24:30,477 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-08 20:24:30,477 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 20:24:30,477 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d67d784d-410d-4beb-b6c6-df1e0a770e8f/bin-2019/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-08 20:24:30,484 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-08 20:24:30,484 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-08 20:24:30,498 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2018-12-08 20:24:30,498 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 20:24:30,503 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 20:24:30,534 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 18 proven. 7 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-12-08 20:24:30,534 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-08 20:24:30,650 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 18 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2018-12-08 20:24:30,665 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-08 20:24:30,665 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7] total 11 [2018-12-08 20:24:30,665 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-08 20:24:30,666 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-08 20:24:30,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-08 20:24:30,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2018-12-08 20:24:30,666 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand 8 states. [2018-12-08 20:24:30,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 20:24:30,743 INFO L93 Difference]: Finished difference Result 73 states and 99 transitions. [2018-12-08 20:24:30,743 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-12-08 20:24:30,743 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 39 [2018-12-08 20:24:30,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 20:24:30,745 INFO L225 Difference]: With dead ends: 73 [2018-12-08 20:24:30,745 INFO L226 Difference]: Without dead ends: 47 [2018-12-08 20:24:30,745 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 71 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2018-12-08 20:24:30,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-12-08 20:24:30,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 39. [2018-12-08 20:24:30,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-12-08 20:24:30,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2018-12-08 20:24:30,754 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 39 [2018-12-08 20:24:30,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 20:24:30,754 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2018-12-08 20:24:30,754 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-08 20:24:30,754 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2018-12-08 20:24:30,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-12-08 20:24:30,755 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 20:24:30,755 INFO L402 BasicCegarLoop]: trace histogram [5, 5, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 20:24:30,756 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 20:24:30,756 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 20:24:30,756 INFO L82 PathProgramCache]: Analyzing trace with hash 380905728, now seen corresponding path program 1 times [2018-12-08 20:24:30,756 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-08 20:24:30,757 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 20:24:30,757 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 20:24:30,757 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 20:24:30,757 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-08 20:24:30,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 20:24:30,795 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 20 proven. 8 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2018-12-08 20:24:30,795 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 20:24:30,796 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-08 20:24:30,796 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 42 with the following transitions: [2018-12-08 20:24:30,796 INFO L205 CegarAbsIntRunner]: [0], [3], [4], [7], [8], [10], [12], [13], [14], [18], [20], [24], [26], [29], [30], [31], [32], [33], [34], [35], [37], [38] [2018-12-08 20:24:30,797 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-08 20:24:30,797 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-08 20:24:41,258 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-08 20:24:41,258 INFO L272 AbstractInterpreter]: Visited 22 different actions 127888 times. Merged at 10 different actions 40987 times. Widened at 2 different actions 7475 times. Performed 328376 root evaluator evaluations with a maximum evaluation depth of 4. Performed 328376 inverse root evaluator evaluations with a maximum inverse evaluation depth of 4. Found 17048 fixpoints after 5 different actions. Largest state had 5 variables. [2018-12-08 20:24:41,260 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 20:24:41,261 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-08 20:24:41,261 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 20:24:41,261 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d67d784d-410d-4beb-b6c6-df1e0a770e8f/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 [2018-12-08 20:24:41,266 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 20:24:41,266 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-08 20:24:41,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 20:24:41,275 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 20:24:41,289 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-12-08 20:24:41,289 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-08 20:24:41,448 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 31 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2018-12-08 20:24:41,462 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-08 20:24:41,462 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 9] total 11 [2018-12-08 20:24:41,462 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-08 20:24:41,463 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-12-08 20:24:41,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-12-08 20:24:41,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2018-12-08 20:24:41,463 INFO L87 Difference]: Start difference. First operand 39 states and 45 transitions. Second operand 7 states. [2018-12-08 20:24:41,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 20:24:41,510 INFO L93 Difference]: Finished difference Result 70 states and 111 transitions. [2018-12-08 20:24:41,510 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-08 20:24:41,510 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 41 [2018-12-08 20:24:41,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 20:24:41,511 INFO L225 Difference]: With dead ends: 70 [2018-12-08 20:24:41,512 INFO L226 Difference]: Without dead ends: 56 [2018-12-08 20:24:41,512 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 73 SyntacticMatches, 6 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2018-12-08 20:24:41,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-12-08 20:24:41,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 41. [2018-12-08 20:24:41,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-12-08 20:24:41,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2018-12-08 20:24:41,517 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 41 [2018-12-08 20:24:41,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 20:24:41,518 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2018-12-08 20:24:41,518 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-12-08 20:24:41,518 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2018-12-08 20:24:41,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-12-08 20:24:41,519 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 20:24:41,519 INFO L402 BasicCegarLoop]: trace histogram [9, 9, 6, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 20:24:41,519 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 20:24:41,519 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 20:24:41,519 INFO L82 PathProgramCache]: Analyzing trace with hash 1559307686, now seen corresponding path program 2 times [2018-12-08 20:24:41,519 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-08 20:24:41,520 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 20:24:41,520 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 20:24:41,520 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 20:24:41,520 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-08 20:24:41,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 20:24:41,588 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 47 proven. 43 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2018-12-08 20:24:41,588 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 20:24:41,588 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-08 20:24:41,588 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-08 20:24:41,588 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-08 20:24:41,589 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 20:24:41,589 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d67d784d-410d-4beb-b6c6-df1e0a770e8f/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 [2018-12-08 20:24:41,598 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-08 20:24:41,598 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-08 20:24:41,610 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2018-12-08 20:24:41,610 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 20:24:41,612 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 20:24:41,646 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 64 proven. 24 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2018-12-08 20:24:41,646 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-08 20:24:41,813 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 66 proven. 29 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2018-12-08 20:24:41,828 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-08 20:24:41,828 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 9] total 17 [2018-12-08 20:24:41,828 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-08 20:24:41,829 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-12-08 20:24:41,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-12-08 20:24:41,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2018-12-08 20:24:41,829 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand 13 states. [2018-12-08 20:24:42,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 20:24:42,102 INFO L93 Difference]: Finished difference Result 98 states and 144 transitions. [2018-12-08 20:24:42,102 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-12-08 20:24:42,102 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 67 [2018-12-08 20:24:42,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 20:24:42,103 INFO L225 Difference]: With dead ends: 98 [2018-12-08 20:24:42,103 INFO L226 Difference]: Without dead ends: 68 [2018-12-08 20:24:42,104 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 121 SyntacticMatches, 6 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=216, Invalid=596, Unknown=0, NotChecked=0, Total=812 [2018-12-08 20:24:42,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-12-08 20:24:42,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 60. [2018-12-08 20:24:42,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-12-08 20:24:42,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 79 transitions. [2018-12-08 20:24:42,110 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 79 transitions. Word has length 67 [2018-12-08 20:24:42,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 20:24:42,111 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 79 transitions. [2018-12-08 20:24:42,111 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-12-08 20:24:42,111 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 79 transitions. [2018-12-08 20:24:42,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-12-08 20:24:42,112 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 20:24:42,112 INFO L402 BasicCegarLoop]: trace histogram [13, 13, 11, 6, 6, 6, 6, 6, 6, 6, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 20:24:42,112 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 20:24:42,113 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 20:24:42,113 INFO L82 PathProgramCache]: Analyzing trace with hash -987229488, now seen corresponding path program 3 times [2018-12-08 20:24:42,113 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-08 20:24:42,113 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 20:24:42,113 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 20:24:42,114 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 20:24:42,114 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-08 20:24:42,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 20:24:42,199 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 176 proven. 28 refuted. 0 times theorem prover too weak. 223 trivial. 0 not checked. [2018-12-08 20:24:42,199 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 20:24:42,200 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-08 20:24:42,200 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-08 20:24:42,200 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-08 20:24:42,200 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 20:24:42,200 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d67d784d-410d-4beb-b6c6-df1e0a770e8f/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 [2018-12-08 20:24:42,205 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-08 20:24:42,205 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-08 20:24:42,218 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-08 20:24:42,218 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 20:24:42,221 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 20:24:42,278 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 27 proven. 166 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2018-12-08 20:24:42,278 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-08 20:24:42,577 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 27 proven. 181 refuted. 0 times theorem prover too weak. 219 trivial. 0 not checked. [2018-12-08 20:24:42,592 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-08 20:24:42,592 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 11] total 20 [2018-12-08 20:24:42,592 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-08 20:24:42,593 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-12-08 20:24:42,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-12-08 20:24:42,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2018-12-08 20:24:42,593 INFO L87 Difference]: Start difference. First operand 60 states and 79 transitions. Second operand 15 states. [2018-12-08 20:24:42,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 20:24:42,787 INFO L93 Difference]: Finished difference Result 132 states and 201 transitions. [2018-12-08 20:24:42,787 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-12-08 20:24:42,787 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 96 [2018-12-08 20:24:42,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 20:24:42,788 INFO L225 Difference]: With dead ends: 132 [2018-12-08 20:24:42,788 INFO L226 Difference]: Without dead ends: 76 [2018-12-08 20:24:42,789 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 176 SyntacticMatches, 8 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2018-12-08 20:24:42,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2018-12-08 20:24:42,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 67. [2018-12-08 20:24:42,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-12-08 20:24:42,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 83 transitions. [2018-12-08 20:24:42,795 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 83 transitions. Word has length 96 [2018-12-08 20:24:42,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 20:24:42,795 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 83 transitions. [2018-12-08 20:24:42,795 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-12-08 20:24:42,795 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 83 transitions. [2018-12-08 20:24:42,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2018-12-08 20:24:42,796 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 20:24:42,796 INFO L402 BasicCegarLoop]: trace histogram [15, 15, 12, 7, 7, 7, 7, 7, 7, 7, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 20:24:42,796 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 20:24:42,796 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 20:24:42,796 INFO L82 PathProgramCache]: Analyzing trace with hash 580129251, now seen corresponding path program 4 times [2018-12-08 20:24:42,796 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-08 20:24:42,797 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 20:24:42,797 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 20:24:42,797 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 20:24:42,797 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-08 20:24:42,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 20:24:42,852 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 174 proven. 59 refuted. 0 times theorem prover too weak. 337 trivial. 0 not checked. [2018-12-08 20:24:42,853 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 20:24:42,853 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-08 20:24:42,853 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-08 20:24:42,853 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-08 20:24:42,853 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 20:24:42,853 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d67d784d-410d-4beb-b6c6-df1e0a770e8f/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 [2018-12-08 20:24:42,859 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 20:24:42,859 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-08 20:24:42,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 20:24:42,876 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 20:24:42,893 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 42 proven. 229 refuted. 0 times theorem prover too weak. 299 trivial. 0 not checked. [2018-12-08 20:24:42,893 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-08 20:24:43,272 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 42 proven. 255 refuted. 0 times theorem prover too weak. 273 trivial. 0 not checked. [2018-12-08 20:24:43,287 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-08 20:24:43,288 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 13] total 15 [2018-12-08 20:24:43,288 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-08 20:24:43,288 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-12-08 20:24:43,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-12-08 20:24:43,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2018-12-08 20:24:43,289 INFO L87 Difference]: Start difference. First operand 67 states and 83 transitions. Second operand 9 states. [2018-12-08 20:24:43,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 20:24:43,351 INFO L93 Difference]: Finished difference Result 92 states and 129 transitions. [2018-12-08 20:24:43,352 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-12-08 20:24:43,352 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 109 [2018-12-08 20:24:43,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 20:24:43,353 INFO L225 Difference]: With dead ends: 92 [2018-12-08 20:24:43,353 INFO L226 Difference]: Without dead ends: 78 [2018-12-08 20:24:43,353 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 205 SyntacticMatches, 10 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=123, Invalid=257, Unknown=0, NotChecked=0, Total=380 [2018-12-08 20:24:43,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-12-08 20:24:43,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 65. [2018-12-08 20:24:43,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-12-08 20:24:43,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 77 transitions. [2018-12-08 20:24:43,358 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 77 transitions. Word has length 109 [2018-12-08 20:24:43,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 20:24:43,358 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 77 transitions. [2018-12-08 20:24:43,359 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-12-08 20:24:43,359 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 77 transitions. [2018-12-08 20:24:43,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2018-12-08 20:24:43,360 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 20:24:43,360 INFO L402 BasicCegarLoop]: trace histogram [29, 29, 23, 14, 14, 14, 14, 14, 14, 14, 9, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 20:24:43,360 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 20:24:43,360 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 20:24:43,360 INFO L82 PathProgramCache]: Analyzing trace with hash -1510121204, now seen corresponding path program 5 times [2018-12-08 20:24:43,360 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-08 20:24:43,361 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 20:24:43,361 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 20:24:43,361 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 20:24:43,361 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-08 20:24:43,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 20:24:43,464 INFO L134 CoverageAnalysis]: Checked inductivity of 2241 backedges. 403 proven. 124 refuted. 0 times theorem prover too weak. 1714 trivial. 0 not checked. [2018-12-08 20:24:43,465 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 20:24:43,465 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-08 20:24:43,465 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-08 20:24:43,465 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-08 20:24:43,465 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 20:24:43,465 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d67d784d-410d-4beb-b6c6-df1e0a770e8f/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 [2018-12-08 20:24:43,470 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-08 20:24:43,471 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-08 20:24:43,490 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-12-08 20:24:43,490 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 20:24:43,493 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 20:24:43,516 INFO L134 CoverageAnalysis]: Checked inductivity of 2241 backedges. 433 proven. 94 refuted. 0 times theorem prover too weak. 1714 trivial. 0 not checked. [2018-12-08 20:24:43,516 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-08 20:24:43,884 INFO L134 CoverageAnalysis]: Checked inductivity of 2241 backedges. 437 proven. 107 refuted. 0 times theorem prover too weak. 1697 trivial. 0 not checked. [2018-12-08 20:24:43,899 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-08 20:24:43,900 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 11] total 14 [2018-12-08 20:24:43,900 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-08 20:24:43,900 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-12-08 20:24:43,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-12-08 20:24:43,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2018-12-08 20:24:43,900 INFO L87 Difference]: Start difference. First operand 65 states and 77 transitions. Second operand 9 states. [2018-12-08 20:24:43,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 20:24:43,981 INFO L93 Difference]: Finished difference Result 85 states and 113 transitions. [2018-12-08 20:24:43,981 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-12-08 20:24:43,981 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 204 [2018-12-08 20:24:43,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 20:24:43,982 INFO L225 Difference]: With dead ends: 85 [2018-12-08 20:24:43,982 INFO L226 Difference]: Without dead ends: 78 [2018-12-08 20:24:43,983 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 423 GetRequests, 398 SyntacticMatches, 8 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2018-12-08 20:24:43,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-12-08 20:24:43,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 68. [2018-12-08 20:24:43,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-12-08 20:24:43,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 83 transitions. [2018-12-08 20:24:43,988 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 83 transitions. Word has length 204 [2018-12-08 20:24:43,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 20:24:43,989 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 83 transitions. [2018-12-08 20:24:43,989 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-12-08 20:24:43,989 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 83 transitions. [2018-12-08 20:24:43,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2018-12-08 20:24:43,990 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 20:24:43,990 INFO L402 BasicCegarLoop]: trace histogram [31, 31, 25, 15, 15, 15, 15, 15, 15, 15, 10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 20:24:43,991 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 20:24:43,991 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 20:24:43,991 INFO L82 PathProgramCache]: Analyzing trace with hash -1009195755, now seen corresponding path program 6 times [2018-12-08 20:24:43,991 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-08 20:24:43,991 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 20:24:43,992 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 20:24:43,992 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 20:24:43,992 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-08 20:24:44,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 20:24:44,065 INFO L134 CoverageAnalysis]: Checked inductivity of 2580 backedges. 137 proven. 567 refuted. 0 times theorem prover too weak. 1876 trivial. 0 not checked. [2018-12-08 20:24:44,066 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 20:24:44,066 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-08 20:24:44,066 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-08 20:24:44,066 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-08 20:24:44,066 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 20:24:44,066 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d67d784d-410d-4beb-b6c6-df1e0a770e8f/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 [2018-12-08 20:24:44,072 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-08 20:24:44,072 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-08 20:24:44,096 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-08 20:24:44,096 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 20:24:44,098 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 20:24:44,120 INFO L134 CoverageAnalysis]: Checked inductivity of 2580 backedges. 108 proven. 716 refuted. 0 times theorem prover too weak. 1756 trivial. 0 not checked. [2018-12-08 20:24:44,121 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-08 20:24:44,784 INFO L134 CoverageAnalysis]: Checked inductivity of 2580 backedges. 108 proven. 756 refuted. 0 times theorem prover too weak. 1716 trivial. 0 not checked. [2018-12-08 20:24:44,799 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-08 20:24:44,799 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 15] total 17 [2018-12-08 20:24:44,799 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-08 20:24:44,800 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-08 20:24:44,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-08 20:24:44,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2018-12-08 20:24:44,800 INFO L87 Difference]: Start difference. First operand 68 states and 83 transitions. Second operand 10 states. [2018-12-08 20:24:44,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 20:24:44,886 INFO L93 Difference]: Finished difference Result 97 states and 144 transitions. [2018-12-08 20:24:44,886 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-12-08 20:24:44,886 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 218 [2018-12-08 20:24:44,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 20:24:44,887 INFO L225 Difference]: With dead ends: 97 [2018-12-08 20:24:44,887 INFO L226 Difference]: Without dead ends: 83 [2018-12-08 20:24:44,887 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 454 GetRequests, 421 SyntacticMatches, 12 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=164, Invalid=342, Unknown=0, NotChecked=0, Total=506 [2018-12-08 20:24:44,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-12-08 20:24:44,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 68. [2018-12-08 20:24:44,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-12-08 20:24:44,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 81 transitions. [2018-12-08 20:24:44,895 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 81 transitions. Word has length 218 [2018-12-08 20:24:44,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 20:24:44,896 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 81 transitions. [2018-12-08 20:24:44,896 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-08 20:24:44,896 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 81 transitions. [2018-12-08 20:24:44,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2018-12-08 20:24:44,900 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 20:24:44,900 INFO L402 BasicCegarLoop]: trace histogram [47, 47, 38, 23, 23, 23, 23, 23, 23, 23, 15, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 20:24:44,900 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 20:24:44,900 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 20:24:44,900 INFO L82 PathProgramCache]: Analyzing trace with hash -2107730799, now seen corresponding path program 7 times [2018-12-08 20:24:44,901 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-08 20:24:44,901 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 20:24:44,901 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 20:24:44,901 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 20:24:44,901 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-08 20:24:44,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 20:24:45,024 INFO L134 CoverageAnalysis]: Checked inductivity of 6039 backedges. 851 proven. 284 refuted. 0 times theorem prover too weak. 4904 trivial. 0 not checked. [2018-12-08 20:24:45,024 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 20:24:45,024 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-08 20:24:45,024 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-08 20:24:45,025 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-08 20:24:45,025 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 20:24:45,025 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d67d784d-410d-4beb-b6c6-df1e0a770e8f/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 [2018-12-08 20:24:45,031 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 20:24:45,031 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-08 20:24:45,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 20:24:45,079 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 20:24:45,178 INFO L134 CoverageAnalysis]: Checked inductivity of 6039 backedges. 225 proven. 1327 refuted. 0 times theorem prover too weak. 4487 trivial. 0 not checked. [2018-12-08 20:24:45,179 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-08 20:24:46,237 INFO L134 CoverageAnalysis]: Checked inductivity of 6039 backedges. 225 proven. 1384 refuted. 0 times theorem prover too weak. 4430 trivial. 0 not checked. [2018-12-08 20:24:46,261 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-08 20:24:46,261 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 17] total 19 [2018-12-08 20:24:46,261 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-08 20:24:46,262 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-12-08 20:24:46,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-12-08 20:24:46,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2018-12-08 20:24:46,262 INFO L87 Difference]: Start difference. First operand 68 states and 81 transitions. Second operand 11 states. [2018-12-08 20:24:46,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 20:24:46,355 INFO L93 Difference]: Finished difference Result 102 states and 161 transitions. [2018-12-08 20:24:46,355 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-12-08 20:24:46,355 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 327 [2018-12-08 20:24:46,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 20:24:46,356 INFO L225 Difference]: With dead ends: 102 [2018-12-08 20:24:46,356 INFO L226 Difference]: Without dead ends: 88 [2018-12-08 20:24:46,357 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 673 GetRequests, 635 SyntacticMatches, 14 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=211, Invalid=439, Unknown=0, NotChecked=0, Total=650 [2018-12-08 20:24:46,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2018-12-08 20:24:46,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 73. [2018-12-08 20:24:46,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-12-08 20:24:46,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 92 transitions. [2018-12-08 20:24:46,362 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 92 transitions. Word has length 327 [2018-12-08 20:24:46,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 20:24:46,362 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 92 transitions. [2018-12-08 20:24:46,362 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-12-08 20:24:46,362 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 92 transitions. [2018-12-08 20:24:46,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 546 [2018-12-08 20:24:46,364 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 20:24:46,364 INFO L402 BasicCegarLoop]: trace histogram [79, 79, 64, 39, 39, 39, 39, 39, 39, 39, 25, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 20:24:46,364 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 20:24:46,364 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 20:24:46,364 INFO L82 PathProgramCache]: Analyzing trace with hash -2143472957, now seen corresponding path program 8 times [2018-12-08 20:24:46,364 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-08 20:24:46,365 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 20:24:46,365 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 20:24:46,365 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 20:24:46,365 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-08 20:24:46,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 20:24:46,504 INFO L134 CoverageAnalysis]: Checked inductivity of 17304 backedges. 1626 proven. 774 refuted. 0 times theorem prover too weak. 14904 trivial. 0 not checked. [2018-12-08 20:24:46,504 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 20:24:46,504 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-08 20:24:46,504 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-08 20:24:46,504 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-08 20:24:46,504 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 20:24:46,504 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d67d784d-410d-4beb-b6c6-df1e0a770e8f/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 [2018-12-08 20:24:46,510 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-08 20:24:46,510 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-08 20:24:46,570 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 32 check-sat command(s) [2018-12-08 20:24:46,570 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 20:24:46,574 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 20:24:46,679 INFO L134 CoverageAnalysis]: Checked inductivity of 17304 backedges. 433 proven. 2734 refuted. 0 times theorem prover too weak. 14137 trivial. 0 not checked. [2018-12-08 20:24:46,679 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-08 20:24:48,207 INFO L134 CoverageAnalysis]: Checked inductivity of 17304 backedges. 433 proven. 2811 refuted. 0 times theorem prover too weak. 14060 trivial. 0 not checked. [2018-12-08 20:24:48,222 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-08 20:24:48,222 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 19] total 20 [2018-12-08 20:24:48,222 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-08 20:24:48,223 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-12-08 20:24:48,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-12-08 20:24:48,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=271, Unknown=0, NotChecked=0, Total=380 [2018-12-08 20:24:48,223 INFO L87 Difference]: Start difference. First operand 73 states and 92 transitions. Second operand 12 states. [2018-12-08 20:24:48,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 20:24:48,355 INFO L93 Difference]: Finished difference Result 107 states and 178 transitions. [2018-12-08 20:24:48,355 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-12-08 20:24:48,355 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 545 [2018-12-08 20:24:48,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 20:24:48,357 INFO L225 Difference]: With dead ends: 107 [2018-12-08 20:24:48,357 INFO L226 Difference]: Without dead ends: 93 [2018-12-08 20:24:48,357 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 1112 GetRequests, 1069 SyntacticMatches, 17 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=261, Invalid=495, Unknown=0, NotChecked=0, Total=756 [2018-12-08 20:24:48,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-12-08 20:24:48,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 78. [2018-12-08 20:24:48,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-12-08 20:24:48,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 105 transitions. [2018-12-08 20:24:48,363 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 105 transitions. Word has length 545 [2018-12-08 20:24:48,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 20:24:48,363 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 105 transitions. [2018-12-08 20:24:48,363 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-12-08 20:24:48,363 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 105 transitions. [2018-12-08 20:24:48,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1063 [2018-12-08 20:24:48,368 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 20:24:48,368 INFO L402 BasicCegarLoop]: trace histogram [155, 155, 125, 77, 77, 77, 77, 77, 77, 77, 48, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 20:24:48,368 INFO L423 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 20:24:48,368 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 20:24:48,369 INFO L82 PathProgramCache]: Analyzing trace with hash 1532270047, now seen corresponding path program 9 times [2018-12-08 20:24:48,369 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-08 20:24:48,369 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 20:24:48,369 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 20:24:48,369 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 20:24:48,369 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-08 20:24:48,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 20:24:48,816 INFO L134 CoverageAnalysis]: Checked inductivity of 67194 backedges. 1812 proven. 7857 refuted. 0 times theorem prover too weak. 57525 trivial. 0 not checked. [2018-12-08 20:24:48,817 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 20:24:48,817 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-08 20:24:48,817 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-08 20:24:48,817 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-08 20:24:48,817 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 20:24:48,817 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d67d784d-410d-4beb-b6c6-df1e0a770e8f/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 [2018-12-08 20:24:48,823 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-08 20:24:48,823 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-08 20:24:48,925 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-08 20:24:48,926 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 20:24:48,937 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 20:24:49,441 INFO L134 CoverageAnalysis]: Checked inductivity of 67194 backedges. 1809 proven. 5017 refuted. 0 times theorem prover too weak. 60368 trivial. 0 not checked. [2018-12-08 20:24:49,441 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-08 20:24:51,884 INFO L134 CoverageAnalysis]: Checked inductivity of 67194 backedges. 1806 proven. 5090 refuted. 0 times theorem prover too weak. 60298 trivial. 0 not checked. [2018-12-08 20:24:51,900 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-08 20:24:51,901 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 13, 20] total 32 [2018-12-08 20:24:51,901 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-08 20:24:51,901 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-12-08 20:24:51,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-12-08 20:24:51,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=792, Unknown=0, NotChecked=0, Total=992 [2018-12-08 20:24:51,902 INFO L87 Difference]: Start difference. First operand 78 states and 105 transitions. Second operand 23 states. [2018-12-08 20:24:52,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 20:24:52,507 INFO L93 Difference]: Finished difference Result 231 states and 487 transitions. [2018-12-08 20:24:52,507 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-12-08 20:24:52,507 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 1062 [2018-12-08 20:24:52,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 20:24:52,508 INFO L225 Difference]: With dead ends: 231 [2018-12-08 20:24:52,508 INFO L226 Difference]: Without dead ends: 130 [2018-12-08 20:24:52,510 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 2175 GetRequests, 2100 SyntacticMatches, 18 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 918 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=843, Invalid=2579, Unknown=0, NotChecked=0, Total=3422 [2018-12-08 20:24:52,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2018-12-08 20:24:52,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 119. [2018-12-08 20:24:52,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-12-08 20:24:52,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 160 transitions. [2018-12-08 20:24:52,518 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 160 transitions. Word has length 1062 [2018-12-08 20:24:52,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 20:24:52,519 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 160 transitions. [2018-12-08 20:24:52,519 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-12-08 20:24:52,519 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 160 transitions. [2018-12-08 20:24:52,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 859 [2018-12-08 20:24:52,523 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 20:24:52,523 INFO L402 BasicCegarLoop]: trace histogram [125, 125, 101, 62, 62, 62, 62, 62, 62, 62, 39, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 20:24:52,524 INFO L423 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 20:24:52,524 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 20:24:52,524 INFO L82 PathProgramCache]: Analyzing trace with hash 11110270, now seen corresponding path program 10 times [2018-12-08 20:24:52,524 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-08 20:24:52,524 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 20:24:52,524 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 20:24:52,524 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 20:24:52,524 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-08 20:24:52,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 20:24:52,841 INFO L134 CoverageAnalysis]: Checked inductivity of 43614 backedges. 2322 proven. 3119 refuted. 0 times theorem prover too weak. 38173 trivial. 0 not checked. [2018-12-08 20:24:52,841 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 20:24:52,841 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-08 20:24:52,841 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-08 20:24:52,841 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-08 20:24:52,841 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 20:24:52,841 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d67d784d-410d-4beb-b6c6-df1e0a770e8f/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 [2018-12-08 20:24:52,847 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 20:24:52,847 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-08 20:24:52,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 20:24:52,963 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 20:24:53,170 INFO L134 CoverageAnalysis]: Checked inductivity of 43614 backedges. 2332 proven. 3102 refuted. 0 times theorem prover too weak. 38180 trivial. 0 not checked. [2018-12-08 20:24:53,170 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-08 20:24:55,448 INFO L134 CoverageAnalysis]: Checked inductivity of 43614 backedges. 2327 proven. 3177 refuted. 0 times theorem prover too weak. 38110 trivial. 0 not checked. [2018-12-08 20:24:55,464 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-08 20:24:55,465 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 20] total 25 [2018-12-08 20:24:55,465 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-08 20:24:55,465 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-12-08 20:24:55,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-12-08 20:24:55,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=427, Unknown=0, NotChecked=0, Total=600 [2018-12-08 20:24:55,466 INFO L87 Difference]: Start difference. First operand 119 states and 160 transitions. Second operand 16 states. [2018-12-08 20:24:55,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 20:24:55,575 INFO L93 Difference]: Finished difference Result 134 states and 180 transitions. [2018-12-08 20:24:55,575 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-12-08 20:24:55,576 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 858 [2018-12-08 20:24:55,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 20:24:55,577 INFO L225 Difference]: With dead ends: 134 [2018-12-08 20:24:55,578 INFO L226 Difference]: Without dead ends: 122 [2018-12-08 20:24:55,578 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 1743 GetRequests, 1695 SyntacticMatches, 18 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=341, Invalid=651, Unknown=0, NotChecked=0, Total=992 [2018-12-08 20:24:55,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2018-12-08 20:24:55,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2018-12-08 20:24:55,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2018-12-08 20:24:55,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 166 transitions. [2018-12-08 20:24:55,588 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 166 transitions. Word has length 858 [2018-12-08 20:24:55,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 20:24:55,589 INFO L480 AbstractCegarLoop]: Abstraction has 122 states and 166 transitions. [2018-12-08 20:24:55,589 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-12-08 20:24:55,589 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 166 transitions. [2018-12-08 20:24:55,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 750 [2018-12-08 20:24:55,593 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 20:24:55,594 INFO L402 BasicCegarLoop]: trace histogram [109, 109, 88, 54, 54, 54, 54, 54, 54, 54, 34, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 20:24:55,594 INFO L423 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 20:24:55,594 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 20:24:55,594 INFO L82 PathProgramCache]: Analyzing trace with hash 1616877860, now seen corresponding path program 11 times [2018-12-08 20:24:55,594 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-08 20:24:55,595 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 20:24:55,595 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 20:24:55,595 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 20:24:55,595 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-08 20:24:55,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 20:24:56,360 INFO L134 CoverageAnalysis]: Checked inductivity of 33096 backedges. 0 proven. 10899 refuted. 0 times theorem prover too weak. 22197 trivial. 0 not checked. [2018-12-08 20:24:56,360 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 20:24:56,361 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-08 20:24:56,361 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-08 20:24:56,361 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-08 20:24:56,361 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 20:24:56,361 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d67d784d-410d-4beb-b6c6-df1e0a770e8f/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 [2018-12-08 20:24:56,367 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-08 20:24:56,367 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-08 20:24:56,636 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 93 check-sat command(s) [2018-12-08 20:24:56,636 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 20:24:56,648 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 20:24:57,258 INFO L134 CoverageAnalysis]: Checked inductivity of 33096 backedges. 0 proven. 10899 refuted. 0 times theorem prover too weak. 22197 trivial. 0 not checked. [2018-12-08 20:24:57,259 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-08 20:25:01,604 INFO L134 CoverageAnalysis]: Checked inductivity of 33096 backedges. 0 proven. 10899 refuted. 0 times theorem prover too weak. 22197 trivial. 0 not checked. [2018-12-08 20:25:01,620 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-08 20:25:01,620 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 36 [2018-12-08 20:25:01,620 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-08 20:25:01,620 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-12-08 20:25:01,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-12-08 20:25:01,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1175, Unknown=0, NotChecked=0, Total=1260 [2018-12-08 20:25:01,621 INFO L87 Difference]: Start difference. First operand 122 states and 166 transitions. Second operand 36 states. [2018-12-08 20:25:01,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 20:25:01,953 INFO L93 Difference]: Finished difference Result 147 states and 203 transitions. [2018-12-08 20:25:01,953 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-12-08 20:25:01,953 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 749 [2018-12-08 20:25:01,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 20:25:01,955 INFO L225 Difference]: With dead ends: 147 [2018-12-08 20:25:01,955 INFO L226 Difference]: Without dead ends: 140 [2018-12-08 20:25:01,955 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 1718 GetRequests, 1574 SyntacticMatches, 110 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=85, Invalid=1175, Unknown=0, NotChecked=0, Total=1260 [2018-12-08 20:25:01,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2018-12-08 20:25:01,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 134. [2018-12-08 20:25:01,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2018-12-08 20:25:01,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 188 transitions. [2018-12-08 20:25:01,966 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 188 transitions. Word has length 749 [2018-12-08 20:25:01,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 20:25:01,967 INFO L480 AbstractCegarLoop]: Abstraction has 134 states and 188 transitions. [2018-12-08 20:25:01,967 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-12-08 20:25:01,967 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 188 transitions. [2018-12-08 20:25:01,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 818 [2018-12-08 20:25:01,972 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 20:25:01,972 INFO L402 BasicCegarLoop]: trace histogram [119, 119, 96, 59, 59, 59, 59, 59, 59, 59, 37, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 20:25:01,972 INFO L423 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 20:25:01,972 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 20:25:01,973 INFO L82 PathProgramCache]: Analyzing trace with hash 558019045, now seen corresponding path program 12 times [2018-12-08 20:25:01,973 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-08 20:25:01,973 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 20:25:01,973 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 20:25:01,973 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 20:25:01,973 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-08 20:25:02,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 20:25:02,270 INFO L134 CoverageAnalysis]: Checked inductivity of 39488 backedges. 1020 proven. 4737 refuted. 0 times theorem prover too weak. 33731 trivial. 0 not checked. [2018-12-08 20:25:02,271 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 20:25:02,271 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-08 20:25:02,271 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-08 20:25:02,271 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-08 20:25:02,271 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 20:25:02,271 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d67d784d-410d-4beb-b6c6-df1e0a770e8f/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 [2018-12-08 20:25:02,277 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-08 20:25:02,277 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-08 20:25:02,364 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-08 20:25:02,364 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 20:25:02,370 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 20:25:02,640 INFO L134 CoverageAnalysis]: Checked inductivity of 39488 backedges. 1036 proven. 4713 refuted. 0 times theorem prover too weak. 33739 trivial. 0 not checked. [2018-12-08 20:25:02,641 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-08 20:25:05,341 INFO L134 CoverageAnalysis]: Checked inductivity of 39488 backedges. 1028 proven. 4813 refuted. 0 times theorem prover too weak. 33647 trivial. 0 not checked. [2018-12-08 20:25:05,363 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-08 20:25:05,363 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 22] total 27 [2018-12-08 20:25:05,363 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-08 20:25:05,364 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-12-08 20:25:05,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-12-08 20:25:05,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=502, Unknown=0, NotChecked=0, Total=702 [2018-12-08 20:25:05,364 INFO L87 Difference]: Start difference. First operand 134 states and 188 transitions. Second operand 17 states. [2018-12-08 20:25:05,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 20:25:05,485 INFO L93 Difference]: Finished difference Result 162 states and 251 transitions. [2018-12-08 20:25:05,485 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-12-08 20:25:05,485 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 817 [2018-12-08 20:25:05,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 20:25:05,486 INFO L225 Difference]: With dead ends: 162 [2018-12-08 20:25:05,486 INFO L226 Difference]: Without dead ends: 0 [2018-12-08 20:25:05,486 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 1664 GetRequests, 1611 SyntacticMatches, 20 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=408, Invalid=782, Unknown=0, NotChecked=0, Total=1190 [2018-12-08 20:25:05,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-12-08 20:25:05,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-12-08 20:25:05,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-12-08 20:25:05,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-12-08 20:25:05,487 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 817 [2018-12-08 20:25:05,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 20:25:05,487 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-12-08 20:25:05,487 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-12-08 20:25:05,487 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-12-08 20:25:05,487 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-12-08 20:25:05,490 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-12-08 20:25:05,530 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-08 20:25:05,555 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-08 20:25:05,566 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-08 20:25:05,572 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-08 20:25:05,578 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-08 20:25:05,581 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-08 20:25:05,635 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-08 20:25:05,639 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-08 20:25:05,641 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-08 20:25:05,643 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-08 20:25:05,645 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-08 20:25:05,649 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-08 20:25:05,672 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-08 20:25:05,675 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-08 20:25:05,677 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-08 20:25:05,678 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-08 20:25:05,680 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-08 20:25:05,682 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-08 20:25:05,683 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-08 20:25:05,685 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-08 20:25:05,697 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-08 20:25:05,703 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-08 20:25:05,709 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-08 20:25:05,711 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-08 20:25:05,718 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-08 20:25:05,729 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-08 20:25:05,737 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-08 20:25:05,745 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-08 20:25:05,750 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-08 20:25:05,752 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-08 20:25:05,761 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-08 20:25:05,770 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-08 20:25:05,772 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-08 20:25:05,779 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-08 20:25:05,781 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-08 20:25:05,784 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-08 20:25:05,786 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-08 20:25:05,792 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-08 20:25:05,809 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-08 20:25:05,816 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-08 20:25:05,822 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-08 20:25:05,824 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-08 20:25:05,861 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-08 20:25:05,866 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-08 20:25:05,868 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-08 20:25:05,869 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-08 20:25:05,871 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-08 20:25:05,875 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-08 20:25:05,892 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-08 20:25:05,894 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-08 20:25:05,897 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-08 20:25:05,898 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-08 20:25:05,900 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-08 20:25:05,901 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-08 20:25:05,903 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-08 20:25:05,905 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-08 20:25:05,935 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-08 20:25:05,944 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-08 20:25:05,950 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-08 20:25:05,953 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-08 20:25:05,968 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-08 20:25:05,974 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-08 20:25:05,979 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-08 20:25:05,980 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-08 20:25:05,986 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-08 20:25:05,997 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-08 20:25:06,003 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-08 20:25:06,009 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-08 20:25:06,011 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-08 20:25:06,013 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-08 20:25:06,065 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-08 20:25:06,069 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-08 20:25:06,072 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-08 20:25:06,074 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-08 20:25:06,077 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-08 20:25:06,079 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-08 20:25:06,081 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-08 20:25:06,084 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-08 20:25:06,111 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-08 20:25:06,115 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-08 20:25:06,117 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-08 20:25:06,118 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-08 20:25:06,120 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-08 20:25:06,123 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-08 20:25:06,817 WARN L180 SmtUtils]: Spent 612.00 ms on a formula simplification. DAG size of input: 208 DAG size of output: 63 [2018-12-08 20:25:06,819 INFO L448 ceAbstractionStarter]: For program point fibonacciFINAL(lines 14 22) no Hoare annotation was computed. [2018-12-08 20:25:06,819 INFO L451 ceAbstractionStarter]: At program point fibonacciENTRY(lines 14 22) the Hoare annotation is: true [2018-12-08 20:25:06,819 INFO L444 ceAbstractionStarter]: At program point L20(line 20) the Hoare annotation is: (and (<= |fibonacci_#in~n| fibonacci_~n) (<= 2 fibonacci_~n) (<= fibonacci_~n |fibonacci_#in~n|)) [2018-12-08 20:25:06,819 INFO L448 ceAbstractionStarter]: For program point L20-1(line 20) no Hoare annotation was computed. [2018-12-08 20:25:06,819 INFO L444 ceAbstractionStarter]: At program point L20-2(line 20) the Hoare annotation is: (let ((.cse4 (<= |fibonacci_#in~n| fibonacci_~n))) (let ((.cse3 (and (<= 4 fibonacci_~n) .cse4)) (.cse2 (<= fibonacci_~n |fibonacci_#in~n|))) (and (or (not (= |fibonacci_#in~n| 9)) (and (<= |fibonacci_#t~ret0| 21) (<= 21 |fibonacci_#t~ret0|))) (let ((.cse0 (<= |fibonacci_#t~ret0| 1)) (.cse1 (<= 1 |fibonacci_#t~ret0|))) (or (and .cse0 .cse1 (<= |fibonacci_#in~n| 2) (<= 2 fibonacci_~n) .cse2) (and (<= 5 |fibonacci_#in~n|) .cse3 (<= 3 |fibonacci_#t~ret0|) (<= |fibonacci_#t~ret0| 3) (<= |fibonacci_#in~n| 5) .cse2) (and (<= 4 |fibonacci_#in~n|) .cse4 (<= |fibonacci_#t~ret0| 2) (<= |fibonacci_#in~n| 4) (<= 2 |fibonacci_#t~ret0|) .cse2) (and (<= 5 |fibonacci_#t~ret0|) (<= |fibonacci_#in~n| 6) (<= 6 |fibonacci_#in~n|) (<= |fibonacci_#t~ret0| 5)) (and (<= 7 |fibonacci_#in~n|) (<= |fibonacci_#t~ret0| 8) (<= 8 |fibonacci_#t~ret0|)) (<= 8 |fibonacci_#in~n|) (and .cse0 (<= |fibonacci_#in~n| 3) .cse1 (<= 3 fibonacci_~n) .cse2))) (or (and .cse3 .cse2) (< |fibonacci_#in~n| 6)) (or (not (= |fibonacci_#in~n| 8)) (and (<= 13 |fibonacci_#t~ret0|) (<= |fibonacci_#t~ret0| 13)))))) [2018-12-08 20:25:06,819 INFO L448 ceAbstractionStarter]: For program point fibonacciEXIT(lines 14 22) no Hoare annotation was computed. [2018-12-08 20:25:06,819 INFO L448 ceAbstractionStarter]: For program point L17(lines 17 21) no Hoare annotation was computed. [2018-12-08 20:25:06,819 INFO L448 ceAbstractionStarter]: For program point L20-3(line 20) no Hoare annotation was computed. [2018-12-08 20:25:06,819 INFO L448 ceAbstractionStarter]: For program point L15(lines 15 21) no Hoare annotation was computed. [2018-12-08 20:25:06,819 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-12-08 20:25:06,820 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-12-08 20:25:06,820 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-12-08 20:25:06,820 INFO L451 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-12-08 20:25:06,820 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-12-08 20:25:06,820 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-12-08 20:25:06,820 INFO L448 ceAbstractionStarter]: For program point L31(line 31) no Hoare annotation was computed. [2018-12-08 20:25:06,820 INFO L451 ceAbstractionStarter]: At program point mainENTRY(lines 25 33) the Hoare annotation is: true [2018-12-08 20:25:06,820 INFO L448 ceAbstractionStarter]: For program point mainFINAL(lines 25 33) no Hoare annotation was computed. [2018-12-08 20:25:06,820 INFO L448 ceAbstractionStarter]: For program point L28(lines 28 32) no Hoare annotation was computed. [2018-12-08 20:25:06,820 INFO L444 ceAbstractionStarter]: At program point L27(line 27) the Hoare annotation is: (= main_~x~0 9) [2018-12-08 20:25:06,820 INFO L448 ceAbstractionStarter]: For program point L27-1(line 27) no Hoare annotation was computed. [2018-12-08 20:25:06,820 INFO L448 ceAbstractionStarter]: For program point mainEXIT(lines 25 33) no Hoare annotation was computed. [2018-12-08 20:25:06,820 INFO L448 ceAbstractionStarter]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 31) no Hoare annotation was computed. [2018-12-08 20:25:06,822 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 08.12 08:25:06 BoogieIcfgContainer [2018-12-08 20:25:06,822 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-12-08 20:25:06,822 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-12-08 20:25:06,822 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-12-08 20:25:06,822 INFO L276 PluginConnector]: Witness Printer initialized [2018-12-08 20:25:06,822 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.12 08:24:29" (3/4) ... [2018-12-08 20:25:06,825 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-12-08 20:25:06,828 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure fibonacci [2018-12-08 20:25:06,828 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-12-08 20:25:06,829 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-12-08 20:25:06,831 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2018-12-08 20:25:06,831 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2018-12-08 20:25:06,831 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-12-08 20:25:06,853 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_d67d784d-410d-4beb-b6c6-df1e0a770e8f/bin-2019/utaipan/witness.graphml [2018-12-08 20:25:06,853 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-12-08 20:25:06,854 INFO L168 Benchmark]: Toolchain (without parser) took 37588.46 ms. Allocated memory was 1.0 GB in the beginning and 4.7 GB in the end (delta: 3.6 GB). Free memory was 952.4 MB in the beginning and 1.8 GB in the end (delta: -820.2 MB). Peak memory consumption was 2.8 GB. Max. memory is 11.5 GB. [2018-12-08 20:25:06,854 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 1.0 GB. Free memory is still 973.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-08 20:25:06,854 INFO L168 Benchmark]: CACSL2BoogieTranslator took 115.48 ms. Allocated memory is still 1.0 GB. Free memory was 952.4 MB in the beginning and 941.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-12-08 20:25:06,855 INFO L168 Benchmark]: Boogie Procedure Inliner took 11.67 ms. Allocated memory is still 1.0 GB. Free memory is still 941.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-08 20:25:06,855 INFO L168 Benchmark]: Boogie Preprocessor took 9.97 ms. Allocated memory is still 1.0 GB. Free memory is still 941.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-08 20:25:06,855 INFO L168 Benchmark]: RCFGBuilder took 151.81 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 103.3 MB). Free memory was 941.6 MB in the beginning and 1.1 GB in the end (delta: -148.1 MB). Peak memory consumption was 18.1 MB. Max. memory is 11.5 GB. [2018-12-08 20:25:06,855 INFO L168 Benchmark]: TraceAbstraction took 37265.44 ms. Allocated memory was 1.1 GB in the beginning and 4.7 GB in the end (delta: 3.5 GB). Free memory was 1.1 GB in the beginning and 1.8 GB in the end (delta: -682.8 MB). Peak memory consumption was 2.9 GB. Max. memory is 11.5 GB. [2018-12-08 20:25:06,855 INFO L168 Benchmark]: Witness Printer took 31.43 ms. Allocated memory is still 4.7 GB. Free memory is still 1.8 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-08 20:25:06,856 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 1.0 GB. Free memory is still 973.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 115.48 ms. Allocated memory is still 1.0 GB. Free memory was 952.4 MB in the beginning and 941.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 11.67 ms. Allocated memory is still 1.0 GB. Free memory is still 941.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 9.97 ms. Allocated memory is still 1.0 GB. Free memory is still 941.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 151.81 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 103.3 MB). Free memory was 941.6 MB in the beginning and 1.1 GB in the end (delta: -148.1 MB). Peak memory consumption was 18.1 MB. Max. memory is 11.5 GB. * TraceAbstraction took 37265.44 ms. Allocated memory was 1.1 GB in the beginning and 4.7 GB in the end (delta: 3.5 GB). Free memory was 1.1 GB in the beginning and 1.8 GB in the end (delta: -682.8 MB). Peak memory consumption was 2.9 GB. Max. memory is 11.5 GB. * Witness Printer took 31.43 ms. Allocated memory is still 4.7 GB. Free memory is still 1.8 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 31]: 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, 23 locations, 1 error locations. SAFE Result, 37.2s OverallTime, 16 OverallIterations, 155 TraceHistogramMax, 2.4s AutomataDifference, 0.0s DeadEndRemovalTime, 1.3s HoareAnnotationTime, HoareTripleCheckerStatistics: 408 SDtfs, 491 SDslu, 2431 SDs, 0 SdLazy, 3028 SolverSat, 573 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.1s Time, PredicateUnifierStatistics: 2 DeclaredPredicates, 10782 GetRequests, 10173 SyntacticMatches, 252 SemanticMatches, 357 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2827 ImplicationChecksByTransitivity, 3.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=134occurred in iteration=15, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 10.7s AbstIntTime, 2 AbstIntIterations, 1 AbstIntStrong, 0.84 AbsIntWeakeningRatio, 0.56 AbsIntAvgWeakeningVarsNumRemoved, 0.16 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 16 MinimizatonAttempts, 129 StatesRemovedByMinimization, 13 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 242 PreInvPairs, 663 NumberOfFragments, 160 HoareAnnotationTreeSize, 242 FomulaSimplifications, 1137183 FormulaSimplificationTreeSizeReduction, 0.6s HoareSimplificationTime, 8 FomulaSimplificationsInter, 24888 FormulaSimplificationTreeSizeReductionInter, 0.6s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 19.9s InterpolantComputationTime, 10317 NumberOfCodeBlocks, 9543 NumberOfCodeBlocksAsserted, 165 NumberOfCheckSat, 15407 ConstructedInterpolants, 0 QuantifiedInterpolants, 18555641 SizeOfPredicates, 80 NumberOfNonLiveVariables, 9437 ConjunctsInSsa, 600 ConjunctsInUnsatCore, 42 InterpolantComputations, 2 PerfectInterpolantSequences, 551402/638505 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...