./Ultimate.py --spec ../../sv-benchmarks/c/ReachSafety.prp --file ../../sv-benchmarks/c/loop-invgen/nested6_true-unreach-call_true-termination.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5842f4b8 Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_8bddb186-ce55-4f09-8e14-f186641c7000/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_8bddb186-ce55-4f09-8e14-f186641c7000/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_8bddb186-ce55-4f09-8e14-f186641c7000/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_8bddb186-ce55-4f09-8e14-f186641c7000/bin-2019/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-invgen/nested6_true-unreach-call_true-termination.i -s /tmp/vcloud-vcloud-master/worker/working_dir_8bddb186-ce55-4f09-8e14-f186641c7000/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_8bddb186-ce55-4f09-8e14-f186641c7000/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 934ee9c856a834ce808d29dea79c6912619f897f ...................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-5842f4b [2018-11-18 11:22:56,412 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-18 11:22:56,414 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-18 11:22:56,422 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-18 11:22:56,423 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-18 11:22:56,423 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-18 11:22:56,424 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-18 11:22:56,426 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-18 11:22:56,427 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-18 11:22:56,428 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-18 11:22:56,428 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-18 11:22:56,429 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-18 11:22:56,429 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-18 11:22:56,430 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-18 11:22:56,431 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-18 11:22:56,432 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-18 11:22:56,432 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-18 11:22:56,434 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-18 11:22:56,435 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-18 11:22:56,437 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-18 11:22:56,438 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-18 11:22:56,439 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-18 11:22:56,440 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-18 11:22:56,441 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-18 11:22:56,441 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-18 11:22:56,442 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-18 11:22:56,442 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-18 11:22:56,443 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-18 11:22:56,444 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-18 11:22:56,445 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-18 11:22:56,445 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-18 11:22:56,445 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-18 11:22:56,446 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-18 11:22:56,446 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-18 11:22:56,446 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-18 11:22:56,447 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-18 11:22:56,447 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_8bddb186-ce55-4f09-8e14-f186641c7000/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2018-11-18 11:22:56,458 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-18 11:22:56,458 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-18 11:22:56,459 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-18 11:22:56,459 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-18 11:22:56,459 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-18 11:22:56,459 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-18 11:22:56,460 INFO L133 SettingsManager]: * Explicit value domain=true [2018-11-18 11:22:56,460 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-18 11:22:56,460 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-18 11:22:56,460 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-18 11:22:56,460 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-18 11:22:56,460 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-18 11:22:56,460 INFO L133 SettingsManager]: * Interval Domain=false [2018-11-18 11:22:56,461 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-18 11:22:56,461 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-18 11:22:56,461 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-18 11:22:56,461 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-18 11:22:56,462 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-18 11:22:56,462 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-18 11:22:56,462 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-18 11:22:56,462 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-18 11:22:56,462 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-18 11:22:56,462 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-18 11:22:56,462 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-18 11:22:56,463 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-18 11:22:56,463 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-18 11:22:56,463 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-18 11:22:56,463 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-18 11:22:56,463 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-18 11:22:56,463 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-18 11:22:56,463 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-18 11:22:56,463 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-18 11:22:56,464 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-18 11:22:56,464 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-18 11:22:56,464 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-18 11:22:56,464 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-18 11:22:56,464 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-18 11:22:56,464 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_8bddb186-ce55-4f09-8e14-f186641c7000/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 -> 934ee9c856a834ce808d29dea79c6912619f897f [2018-11-18 11:22:56,487 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-18 11:22:56,496 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-18 11:22:56,498 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-18 11:22:56,499 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-18 11:22:56,500 INFO L276 PluginConnector]: CDTParser initialized [2018-11-18 11:22:56,500 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_8bddb186-ce55-4f09-8e14-f186641c7000/bin-2019/utaipan/../../sv-benchmarks/c/loop-invgen/nested6_true-unreach-call_true-termination.i [2018-11-18 11:22:56,543 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_8bddb186-ce55-4f09-8e14-f186641c7000/bin-2019/utaipan/data/abed9d717/77c9eb12c65946db9f93d8618126a7e1/FLAG491932368 [2018-11-18 11:22:56,887 INFO L307 CDTParser]: Found 1 translation units. [2018-11-18 11:22:56,888 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_8bddb186-ce55-4f09-8e14-f186641c7000/sv-benchmarks/c/loop-invgen/nested6_true-unreach-call_true-termination.i [2018-11-18 11:22:56,894 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_8bddb186-ce55-4f09-8e14-f186641c7000/bin-2019/utaipan/data/abed9d717/77c9eb12c65946db9f93d8618126a7e1/FLAG491932368 [2018-11-18 11:22:57,317 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_8bddb186-ce55-4f09-8e14-f186641c7000/bin-2019/utaipan/data/abed9d717/77c9eb12c65946db9f93d8618126a7e1 [2018-11-18 11:22:57,320 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-18 11:22:57,320 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-18 11:22:57,321 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-18 11:22:57,321 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-18 11:22:57,323 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-18 11:22:57,323 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 11:22:57" (1/1) ... [2018-11-18 11:22:57,326 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d58612 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 11:22:57, skipping insertion in model container [2018-11-18 11:22:57,326 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 11:22:57" (1/1) ... [2018-11-18 11:22:57,333 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-18 11:22:57,345 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-18 11:22:57,444 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 11:22:57,447 INFO L191 MainTranslator]: Completed pre-run [2018-11-18 11:22:57,460 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 11:22:57,468 INFO L195 MainTranslator]: Completed translation [2018-11-18 11:22:57,468 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 11:22:57 WrapperNode [2018-11-18 11:22:57,469 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-18 11:22:57,469 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-18 11:22:57,469 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-18 11:22:57,469 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-18 11:22:57,474 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 11:22:57" (1/1) ... [2018-11-18 11:22:57,477 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 11:22:57" (1/1) ... [2018-11-18 11:22:57,481 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-18 11:22:57,481 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-18 11:22:57,481 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-18 11:22:57,482 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-18 11:22:57,487 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 11:22:57" (1/1) ... [2018-11-18 11:22:57,487 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 11:22:57" (1/1) ... [2018-11-18 11:22:57,488 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 11:22:57" (1/1) ... [2018-11-18 11:22:57,488 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 11:22:57" (1/1) ... [2018-11-18 11:22:57,490 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 11:22:57" (1/1) ... [2018-11-18 11:22:57,493 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 11:22:57" (1/1) ... [2018-11-18 11:22:57,494 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 11:22:57" (1/1) ... [2018-11-18 11:22:57,495 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-18 11:22:57,495 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-18 11:22:57,495 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-18 11:22:57,495 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-18 11:22:57,496 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 11:22:57" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8bddb186-ce55-4f09-8e14-f186641c7000/bin-2019/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-18 11:22:57,565 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-18 11:22:57,565 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-18 11:22:57,565 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-18 11:22:57,565 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-18 11:22:57,565 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-18 11:22:57,566 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-18 11:22:57,566 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-11-18 11:22:57,566 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-11-18 11:22:57,695 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-18 11:22:57,696 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 11:22:57 BoogieIcfgContainer [2018-11-18 11:22:57,696 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-18 11:22:57,696 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-18 11:22:57,696 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-18 11:22:57,698 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-18 11:22:57,699 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 11:22:57" (1/3) ... [2018-11-18 11:22:57,699 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2951c7a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 11:22:57, skipping insertion in model container [2018-11-18 11:22:57,699 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 11:22:57" (2/3) ... [2018-11-18 11:22:57,700 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2951c7a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 11:22:57, skipping insertion in model container [2018-11-18 11:22:57,700 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 11:22:57" (3/3) ... [2018-11-18 11:22:57,701 INFO L112 eAbstractionObserver]: Analyzing ICFG nested6_true-unreach-call_true-termination.i [2018-11-18 11:22:57,709 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-18 11:22:57,715 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-18 11:22:57,727 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-18 11:22:57,753 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-18 11:22:57,753 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-18 11:22:57,754 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-18 11:22:57,754 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-18 11:22:57,754 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-18 11:22:57,754 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-18 11:22:57,754 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-18 11:22:57,754 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-18 11:22:57,769 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2018-11-18 11:22:57,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-11-18 11:22:57,775 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 11:22:57,777 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 11:22:57,779 INFO L423 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 11:22:57,783 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 11:22:57,783 INFO L82 PathProgramCache]: Analyzing trace with hash 416534784, now seen corresponding path program 1 times [2018-11-18 11:22:57,784 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 11:22:57,820 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 11:22:57,821 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 11:22:57,821 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 11:22:57,821 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 11:22:57,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 11:22:57,913 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 11:22:57,915 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 11:22:57,915 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-18 11:22:57,915 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 11:22:57,919 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-18 11:22:57,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-18 11:22:57,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-18 11:22:57,932 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 5 states. [2018-11-18 11:22:58,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 11:22:58,000 INFO L93 Difference]: Finished difference Result 63 states and 86 transitions. [2018-11-18 11:22:58,000 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-18 11:22:58,001 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2018-11-18 11:22:58,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 11:22:58,007 INFO L225 Difference]: With dead ends: 63 [2018-11-18 11:22:58,007 INFO L226 Difference]: Without dead ends: 31 [2018-11-18 11:22:58,009 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-11-18 11:22:58,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-11-18 11:22:58,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-11-18 11:22:58,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-11-18 11:22:58,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2018-11-18 11:22:58,034 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 17 [2018-11-18 11:22:58,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 11:22:58,034 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2018-11-18 11:22:58,034 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-18 11:22:58,034 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2018-11-18 11:22:58,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-11-18 11:22:58,035 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 11:22:58,035 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 11:22:58,035 INFO L423 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 11:22:58,035 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 11:22:58,035 INFO L82 PathProgramCache]: Analyzing trace with hash 1670630326, now seen corresponding path program 1 times [2018-11-18 11:22:58,036 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 11:22:58,036 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 11:22:58,037 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 11:22:58,037 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 11:22:58,037 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 11:22:58,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 11:22:58,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 11:22:58,097 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 11:22:58,097 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-18 11:22:58,097 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 11:22:58,098 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-18 11:22:58,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-18 11:22:58,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-11-18 11:22:58,099 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 6 states. [2018-11-18 11:22:58,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 11:22:58,226 INFO L93 Difference]: Finished difference Result 44 states and 51 transitions. [2018-11-18 11:22:58,226 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-18 11:22:58,226 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2018-11-18 11:22:58,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 11:22:58,227 INFO L225 Difference]: With dead ends: 44 [2018-11-18 11:22:58,227 INFO L226 Difference]: Without dead ends: 42 [2018-11-18 11:22:58,228 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2018-11-18 11:22:58,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-11-18 11:22:58,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 35. [2018-11-18 11:22:58,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-11-18 11:22:58,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2018-11-18 11:22:58,233 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 19 [2018-11-18 11:22:58,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 11:22:58,234 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2018-11-18 11:22:58,234 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-18 11:22:58,234 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2018-11-18 11:22:58,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-11-18 11:22:58,234 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 11:22:58,234 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 11:22:58,234 INFO L423 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 11:22:58,234 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 11:22:58,235 INFO L82 PathProgramCache]: Analyzing trace with hash 767827044, now seen corresponding path program 1 times [2018-11-18 11:22:58,235 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 11:22:58,235 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 11:22:58,236 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 11:22:58,236 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 11:22:58,236 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 11:22:58,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 11:22:58,287 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 11:22:58,288 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 11:22:58,288 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 11:22:58,288 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 23 with the following transitions: [2018-11-18 11:22:58,290 INFO L202 CegarAbsIntRunner]: [0], [4], [8], [11], [15], [19], [24], [28], [33], [53], [67], [70], [72], [75], [77], [78], [79], [80], [84], [85], [86] [2018-11-18 11:22:58,317 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-18 11:22:58,318 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-18 11:22:58,413 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-18 11:22:58,413 INFO L272 AbstractInterpreter]: Visited 21 different actions 26 times. Never merged. Never widened. Performed 46 root evaluator evaluations with a maximum evaluation depth of 3. Performed 46 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Never found a fixpoint. Largest state had 7 variables. [2018-11-18 11:22:58,417 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 11:22:58,418 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-18 11:22:58,418 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 11:22:58,419 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8bddb186-ce55-4f09-8e14-f186641c7000/bin-2019/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 11:22:58,424 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 11:22:58,424 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-18 11:22:58,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 11:22:58,441 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 11:22:58,478 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 11:22:58,478 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 11:22:58,490 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 11:22:58,504 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-11-18 11:22:58,504 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [7] total 9 [2018-11-18 11:22:58,505 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 11:22:58,505 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-18 11:22:58,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-18 11:22:58,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2018-11-18 11:22:58,505 INFO L87 Difference]: Start difference. First operand 35 states and 38 transitions. Second operand 5 states. [2018-11-18 11:22:58,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 11:22:58,538 INFO L93 Difference]: Finished difference Result 50 states and 56 transitions. [2018-11-18 11:22:58,538 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-18 11:22:58,538 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2018-11-18 11:22:58,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 11:22:58,539 INFO L225 Difference]: With dead ends: 50 [2018-11-18 11:22:58,539 INFO L226 Difference]: Without dead ends: 48 [2018-11-18 11:22:58,539 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2018-11-18 11:22:58,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-11-18 11:22:58,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-11-18 11:22:58,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-11-18 11:22:58,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 54 transitions. [2018-11-18 11:22:58,546 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 54 transitions. Word has length 22 [2018-11-18 11:22:58,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 11:22:58,546 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 54 transitions. [2018-11-18 11:22:58,546 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-18 11:22:58,547 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 54 transitions. [2018-11-18 11:22:58,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-11-18 11:22:58,547 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 11:22:58,547 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 11:22:58,548 INFO L423 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 11:22:58,548 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 11:22:58,548 INFO L82 PathProgramCache]: Analyzing trace with hash -676333797, now seen corresponding path program 1 times [2018-11-18 11:22:58,548 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 11:22:58,548 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 11:22:58,549 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 11:22:58,549 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 11:22:58,549 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 11:22:58,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 11:22:58,613 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 11:22:58,613 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 11:22:58,614 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 11:22:58,614 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 29 with the following transitions: [2018-11-18 11:22:58,614 INFO L202 CegarAbsIntRunner]: [0], [4], [8], [11], [15], [19], [24], [28], [33], [36], [40], [43], [53], [57], [67], [70], [72], [75], [77], [78], [79], [80], [84], [85], [86] [2018-11-18 11:22:58,615 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-18 11:22:58,615 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-18 11:22:58,708 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-18 11:22:58,708 INFO L272 AbstractInterpreter]: Visited 25 different actions 110 times. Merged at 8 different actions 32 times. Never widened. Performed 242 root evaluator evaluations with a maximum evaluation depth of 3. Performed 242 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 1 fixpoints after 1 different actions. Largest state had 8 variables. [2018-11-18 11:22:58,714 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 11:22:58,714 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-18 11:22:58,714 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 11:22:58,714 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8bddb186-ce55-4f09-8e14-f186641c7000/bin-2019/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 11:22:58,724 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 11:22:58,724 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-18 11:22:58,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 11:22:58,734 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 11:22:58,788 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-18 11:22:58,788 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 11:22:58,808 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 11:22:58,824 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-11-18 11:22:58,824 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [8] total 10 [2018-11-18 11:22:58,824 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 11:22:58,825 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-18 11:22:58,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-18 11:22:58,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2018-11-18 11:22:58,825 INFO L87 Difference]: Start difference. First operand 48 states and 54 transitions. Second operand 5 states. [2018-11-18 11:22:58,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 11:22:58,921 INFO L93 Difference]: Finished difference Result 123 states and 153 transitions. [2018-11-18 11:22:58,922 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-18 11:22:58,922 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 28 [2018-11-18 11:22:58,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 11:22:58,923 INFO L225 Difference]: With dead ends: 123 [2018-11-18 11:22:58,923 INFO L226 Difference]: Without dead ends: 83 [2018-11-18 11:22:58,924 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 54 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2018-11-18 11:22:58,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-11-18 11:22:58,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 55. [2018-11-18 11:22:58,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-11-18 11:22:58,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 62 transitions. [2018-11-18 11:22:58,933 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 62 transitions. Word has length 28 [2018-11-18 11:22:58,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 11:22:58,933 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 62 transitions. [2018-11-18 11:22:58,933 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-18 11:22:58,933 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 62 transitions. [2018-11-18 11:22:58,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-11-18 11:22:58,934 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 11:22:58,934 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 11:22:58,934 INFO L423 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 11:22:58,934 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 11:22:58,938 INFO L82 PathProgramCache]: Analyzing trace with hash 542199398, now seen corresponding path program 1 times [2018-11-18 11:22:58,938 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 11:22:58,939 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 11:22:58,939 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 11:22:58,939 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 11:22:58,939 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 11:22:58,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 11:22:58,984 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-11-18 11:22:58,984 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 11:22:58,984 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 11:22:58,985 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 37 with the following transitions: [2018-11-18 11:22:58,985 INFO L202 CegarAbsIntRunner]: [0], [4], [8], [11], [15], [19], [24], [28], [33], [36], [40], [43], [45], [48], [53], [57], [67], [70], [72], [75], [77], [78], [79], [80], [82], [83], [84], [85], [86] [2018-11-18 11:22:58,986 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-18 11:22:58,986 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-18 11:22:59,048 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-18 11:22:59,049 INFO L272 AbstractInterpreter]: Visited 29 different actions 109 times. Merged at 11 different actions 25 times. Never widened. Performed 206 root evaluator evaluations with a maximum evaluation depth of 4. Performed 206 inverse root evaluator evaluations with a maximum inverse evaluation depth of 4. Found 5 fixpoints after 2 different actions. Largest state had 9 variables. [2018-11-18 11:22:59,054 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 11:22:59,054 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-18 11:22:59,054 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 11:22:59,055 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8bddb186-ce55-4f09-8e14-f186641c7000/bin-2019/utaipan/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 11:22:59,072 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 11:22:59,072 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-18 11:22:59,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 11:22:59,081 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 11:22:59,133 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-18 11:22:59,134 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 11:22:59,172 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-11-18 11:22:59,187 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-18 11:22:59,187 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 11 [2018-11-18 11:22:59,187 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 11:22:59,188 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-18 11:22:59,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-18 11:22:59,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2018-11-18 11:22:59,188 INFO L87 Difference]: Start difference. First operand 55 states and 62 transitions. Second operand 11 states. [2018-11-18 11:22:59,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 11:22:59,380 INFO L93 Difference]: Finished difference Result 109 states and 130 transitions. [2018-11-18 11:22:59,380 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-11-18 11:22:59,380 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 36 [2018-11-18 11:22:59,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 11:22:59,382 INFO L225 Difference]: With dead ends: 109 [2018-11-18 11:22:59,383 INFO L226 Difference]: Without dead ends: 82 [2018-11-18 11:22:59,383 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 71 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2018-11-18 11:22:59,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2018-11-18 11:22:59,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 77. [2018-11-18 11:22:59,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-11-18 11:22:59,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 91 transitions. [2018-11-18 11:22:59,395 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 91 transitions. Word has length 36 [2018-11-18 11:22:59,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 11:22:59,395 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 91 transitions. [2018-11-18 11:22:59,395 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-18 11:22:59,396 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 91 transitions. [2018-11-18 11:22:59,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-11-18 11:22:59,397 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 11:22:59,397 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 11:22:59,397 INFO L423 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 11:22:59,397 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 11:22:59,397 INFO L82 PathProgramCache]: Analyzing trace with hash -1487760091, now seen corresponding path program 1 times [2018-11-18 11:22:59,398 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 11:22:59,398 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 11:22:59,398 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 11:22:59,398 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 11:22:59,399 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 11:22:59,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 11:22:59,489 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 5 proven. 27 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-11-18 11:22:59,489 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 11:22:59,489 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 11:22:59,489 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 48 with the following transitions: [2018-11-18 11:22:59,489 INFO L202 CegarAbsIntRunner]: [0], [4], [8], [11], [15], [19], [24], [28], [31], [33], [36], [40], [43], [53], [57], [61], [67], [70], [72], [75], [77], [78], [79], [80], [84], [85], [86], [87] [2018-11-18 11:22:59,490 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-18 11:22:59,490 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-18 11:22:59,558 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-18 11:22:59,559 INFO L272 AbstractInterpreter]: Visited 28 different actions 130 times. Merged at 13 different actions 41 times. Never widened. Performed 290 root evaluator evaluations with a maximum evaluation depth of 3. Performed 290 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 11 fixpoints after 3 different actions. Largest state had 9 variables. [2018-11-18 11:22:59,563 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 11:22:59,563 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-18 11:22:59,563 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 11:22:59,563 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8bddb186-ce55-4f09-8e14-f186641c7000/bin-2019/utaipan/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 11:22:59,569 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 11:22:59,569 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-18 11:22:59,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 11:22:59,578 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 11:22:59,606 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-11-18 11:22:59,606 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 11:22:59,620 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2018-11-18 11:22:59,635 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-11-18 11:22:59,635 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [13] total 14 [2018-11-18 11:22:59,635 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 11:22:59,636 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-18 11:22:59,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-18 11:22:59,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2018-11-18 11:22:59,636 INFO L87 Difference]: Start difference. First operand 77 states and 91 transitions. Second operand 4 states. [2018-11-18 11:22:59,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 11:22:59,664 INFO L93 Difference]: Finished difference Result 111 states and 131 transitions. [2018-11-18 11:22:59,664 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-18 11:22:59,664 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 47 [2018-11-18 11:22:59,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 11:22:59,664 INFO L225 Difference]: With dead ends: 111 [2018-11-18 11:22:59,664 INFO L226 Difference]: Without dead ends: 0 [2018-11-18 11:22:59,665 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 94 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2018-11-18 11:22:59,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-11-18 11:22:59,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-11-18 11:22:59,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-11-18 11:22:59,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-11-18 11:22:59,666 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 47 [2018-11-18 11:22:59,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 11:22:59,666 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-18 11:22:59,666 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-18 11:22:59,666 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-11-18 11:22:59,666 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-11-18 11:22:59,669 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-11-18 11:22:59,677 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 11:22:59,686 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 11:22:59,714 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 11:22:59,808 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-11-18 11:22:59,808 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-11-18 11:22:59,808 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-11-18 11:22:59,808 INFO L428 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-11-18 11:22:59,808 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-11-18 11:22:59,808 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-11-18 11:22:59,808 INFO L421 ceAbstractionStarter]: At program point L27(line 27) the Hoare annotation is: (and (< main_~j~0 main_~n~0) (<= (* 2 main_~i~0) main_~j~0) (<= main_~k~0 main_~n~0) (<= main_~n~0 main_~k~0)) [2018-11-18 11:22:59,808 INFO L421 ceAbstractionStarter]: At program point L27-1(line 27) the Hoare annotation is: (and (< main_~j~0 main_~n~0) (<= (* 2 main_~i~0) main_~j~0) (<= main_~k~0 main_~n~0) (<= main_~n~0 main_~k~0)) [2018-11-18 11:22:59,808 INFO L425 ceAbstractionStarter]: For program point mainEXIT(lines 10 34) no Hoare annotation was computed. [2018-11-18 11:22:59,808 INFO L421 ceAbstractionStarter]: At program point L23(line 23) the Hoare annotation is: (let ((.cse0 (* 2 main_~i~0))) (and (< main_~j~0 main_~n~0) (<= .cse0 main_~j~0) (<= .cse0 main_~k~0) (<= (+ main_~k~0 1) main_~n~0))) [2018-11-18 11:22:59,809 INFO L425 ceAbstractionStarter]: For program point L23-1(lines 22 24) no Hoare annotation was computed. [2018-11-18 11:22:59,809 INFO L425 ceAbstractionStarter]: For program point L19-1(lines 19 31) no Hoare annotation was computed. [2018-11-18 11:22:59,809 INFO L425 ceAbstractionStarter]: For program point L19-3(lines 19 31) no Hoare annotation was computed. [2018-11-18 11:22:59,809 INFO L425 ceAbstractionStarter]: For program point L15(lines 15 18) no Hoare annotation was computed. [2018-11-18 11:22:59,809 INFO L421 ceAbstractionStarter]: At program point L19-4(lines 19 31) the Hoare annotation is: (let ((.cse0 (<= main_~k~0 main_~n~0)) (.cse1 (<= main_~n~0 main_~k~0))) (or (and .cse0 (<= main_~i~0 0) .cse1) (and .cse0 .cse1 (<= main_~n~0 main_~j~0)))) [2018-11-18 11:22:59,809 INFO L425 ceAbstractionStarter]: For program point L15-1(lines 15 18) no Hoare annotation was computed. [2018-11-18 11:22:59,809 INFO L428 ceAbstractionStarter]: At program point L32(lines 10 34) the Hoare annotation is: true [2018-11-18 11:22:59,809 INFO L425 ceAbstractionStarter]: For program point L28(lines 20 30) no Hoare annotation was computed. [2018-11-18 11:22:59,809 INFO L425 ceAbstractionStarter]: For program point L20-1(lines 20 30) no Hoare annotation was computed. [2018-11-18 11:22:59,809 INFO L421 ceAbstractionStarter]: At program point L20-3(lines 20 30) the Hoare annotation is: (and (<= (* 2 main_~i~0) main_~j~0) (<= main_~k~0 main_~n~0) (<= main_~n~0 main_~k~0)) [2018-11-18 11:22:59,809 INFO L425 ceAbstractionStarter]: For program point L21(lines 21 29) no Hoare annotation was computed. [2018-11-18 11:22:59,809 INFO L425 ceAbstractionStarter]: For program point mainFINAL(lines 10 34) no Hoare annotation was computed. [2018-11-18 11:22:59,809 INFO L428 ceAbstractionStarter]: At program point mainENTRY(lines 10 34) the Hoare annotation is: true [2018-11-18 11:22:59,809 INFO L425 ceAbstractionStarter]: For program point L22-1(lines 22 24) no Hoare annotation was computed. [2018-11-18 11:22:59,809 INFO L421 ceAbstractionStarter]: At program point L22-3(lines 22 24) the Hoare annotation is: (let ((.cse0 (* 2 main_~i~0))) (and (< main_~j~0 main_~n~0) (<= .cse0 main_~j~0) (<= .cse0 main_~k~0) (<= main_~k~0 main_~n~0))) [2018-11-18 11:22:59,809 INFO L425 ceAbstractionStarter]: For program point L14(line 14) no Hoare annotation was computed. [2018-11-18 11:22:59,809 INFO L428 ceAbstractionStarter]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2018-11-18 11:22:59,809 INFO L425 ceAbstractionStarter]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2018-11-18 11:22:59,810 INFO L425 ceAbstractionStarter]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2018-11-18 11:22:59,810 INFO L425 ceAbstractionStarter]: For program point L5(line 5) no Hoare annotation was computed. [2018-11-18 11:22:59,810 INFO L425 ceAbstractionStarter]: For program point L4(lines 4 6) no Hoare annotation was computed. [2018-11-18 11:22:59,810 INFO L425 ceAbstractionStarter]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2018-11-18 11:22:59,819 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.11 11:22:59 BoogieIcfgContainer [2018-11-18 11:22:59,819 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-18 11:22:59,819 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-18 11:22:59,819 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-18 11:22:59,819 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-18 11:22:59,819 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 11:22:57" (3/4) ... [2018-11-18 11:22:59,821 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-11-18 11:22:59,825 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-11-18 11:22:59,825 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-11-18 11:22:59,825 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2018-11-18 11:22:59,827 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 14 nodes and edges [2018-11-18 11:22:59,827 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2018-11-18 11:22:59,827 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-11-18 11:22:59,827 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-11-18 11:22:59,853 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_8bddb186-ce55-4f09-8e14-f186641c7000/bin-2019/utaipan/witness.graphml [2018-11-18 11:22:59,853 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-18 11:22:59,853 INFO L168 Benchmark]: Toolchain (without parser) took 2533.49 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 133.2 MB). Free memory was 959.2 MB in the beginning and 1.1 GB in the end (delta: -97.4 MB). Peak memory consumption was 35.8 MB. Max. memory is 11.5 GB. [2018-11-18 11:22:59,854 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 985.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 11:22:59,854 INFO L168 Benchmark]: CACSL2BoogieTranslator took 148.01 ms. Allocated memory is still 1.0 GB. Free memory was 959.2 MB in the beginning and 948.5 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-11-18 11:22:59,855 INFO L168 Benchmark]: Boogie Procedure Inliner took 12.14 ms. Allocated memory is still 1.0 GB. Free memory is still 948.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 11:22:59,855 INFO L168 Benchmark]: Boogie Preprocessor took 13.62 ms. Allocated memory is still 1.0 GB. Free memory was 948.5 MB in the beginning and 945.8 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2018-11-18 11:22:59,855 INFO L168 Benchmark]: RCFGBuilder took 200.82 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 133.2 MB). Free memory was 945.8 MB in the beginning and 1.1 GB in the end (delta: -167.9 MB). Peak memory consumption was 14.3 MB. Max. memory is 11.5 GB. [2018-11-18 11:22:59,855 INFO L168 Benchmark]: TraceAbstraction took 2122.33 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 53.7 MB). Peak memory consumption was 53.7 MB. Max. memory is 11.5 GB. [2018-11-18 11:22:59,855 INFO L168 Benchmark]: Witness Printer took 34.02 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 3.4 MB). Peak memory consumption was 3.4 MB. Max. memory is 11.5 GB. [2018-11-18 11:22:59,857 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 985.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 148.01 ms. Allocated memory is still 1.0 GB. Free memory was 959.2 MB in the beginning and 948.5 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 12.14 ms. Allocated memory is still 1.0 GB. Free memory is still 948.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 13.62 ms. Allocated memory is still 1.0 GB. Free memory was 948.5 MB in the beginning and 945.8 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 200.82 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 133.2 MB). Free memory was 945.8 MB in the beginning and 1.1 GB in the end (delta: -167.9 MB). Peak memory consumption was 14.3 MB. Max. memory is 11.5 GB. * TraceAbstraction took 2122.33 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 53.7 MB). Peak memory consumption was 53.7 MB. Max. memory is 11.5 GB. * Witness Printer took 34.02 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 3.4 MB). Peak memory consumption was 3.4 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: 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 - InvariantResult [Line: 20]: Loop Invariant Derived loop invariant: (2 * i <= j && k <= n) && n <= k - InvariantResult [Line: 22]: Loop Invariant Derived loop invariant: ((j < n && 2 * i <= j) && 2 * i <= k) && k <= n - InvariantResult [Line: 19]: Loop Invariant Derived loop invariant: ((k <= n && i <= 0) && n <= k) || ((k <= n && n <= k) && n <= j) - InvariantResult [Line: 10]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 32 locations, 1 error locations. SAFE Result, 2.0s OverallTime, 6 OverallIterations, 4 TraceHistogramMax, 0.5s AutomataDifference, 0.0s DeadEndRemovalTime, 0.1s HoareAnnotationTime, HoareTripleCheckerStatistics: 175 SDtfs, 125 SDslu, 463 SDs, 0 SdLazy, 350 SolverSat, 54 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 332 GetRequests, 266 SyntacticMatches, 9 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=77occurred in iteration=5, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.3s AbstIntTime, 4 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 6 MinimizatonAttempts, 40 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 12 LocationsWithAnnotation, 34 PreInvPairs, 52 NumberOfFragments, 108 HoareAnnotationTreeSize, 34 FomulaSimplifications, 908 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 12 FomulaSimplificationsInter, 164 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 302 NumberOfCodeBlocks, 302 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 421 ConstructedInterpolants, 5 QuantifiedInterpolants, 29781 SizeOfPredicates, 14 NumberOfNonLiveVariables, 284 ConjunctsInSsa, 20 ConjunctsInUnsatCore, 14 InterpolantComputations, 8 PerfectInterpolantSequences, 137/174 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...