./Ultimate.py --spec ../../sv-benchmarks/c/ReachSafety.prp --file ../../sv-benchmarks/c/loops/string_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_d7f48a50-169e-4f4e-8213-3ae182cf1fec/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_d7f48a50-169e-4f4e-8213-3ae182cf1fec/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_d7f48a50-169e-4f4e-8213-3ae182cf1fec/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_d7f48a50-169e-4f4e-8213-3ae182cf1fec/bin-2019/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/loops/string_true-unreach-call_true-termination.i -s /tmp/vcloud-vcloud-master/worker/working_dir_d7f48a50-169e-4f4e-8213-3ae182cf1fec/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_d7f48a50-169e-4f4e-8213-3ae182cf1fec/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 e655d34f6b59f7cc9a55d4dc4dc525a41685abad .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 13:50:49,317 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-18 13:50:49,318 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-18 13:50:49,324 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-18 13:50:49,324 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-18 13:50:49,325 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-18 13:50:49,325 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-18 13:50:49,326 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-18 13:50:49,327 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-18 13:50:49,328 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-18 13:50:49,329 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-18 13:50:49,329 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-18 13:50:49,329 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-18 13:50:49,330 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-18 13:50:49,331 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-18 13:50:49,331 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-18 13:50:49,332 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-18 13:50:49,334 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-18 13:50:49,335 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-18 13:50:49,336 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-18 13:50:49,337 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-18 13:50:49,338 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-18 13:50:49,339 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-18 13:50:49,340 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-18 13:50:49,340 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-18 13:50:49,341 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-18 13:50:49,341 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-18 13:50:49,342 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-18 13:50:49,343 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-18 13:50:49,343 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-18 13:50:49,343 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-18 13:50:49,344 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-18 13:50:49,344 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-18 13:50:49,344 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-18 13:50:49,344 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-18 13:50:49,345 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-18 13:50:49,345 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_d7f48a50-169e-4f4e-8213-3ae182cf1fec/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2018-11-18 13:50:49,355 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-18 13:50:49,355 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-18 13:50:49,356 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-18 13:50:49,356 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-18 13:50:49,356 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-18 13:50:49,356 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-18 13:50:49,356 INFO L133 SettingsManager]: * Explicit value domain=true [2018-11-18 13:50:49,356 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-18 13:50:49,356 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-18 13:50:49,357 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-18 13:50:49,357 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-18 13:50:49,357 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-18 13:50:49,357 INFO L133 SettingsManager]: * Interval Domain=false [2018-11-18 13:50:49,357 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-18 13:50:49,358 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-18 13:50:49,358 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-18 13:50:49,358 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-18 13:50:49,358 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-18 13:50:49,358 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-18 13:50:49,358 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-18 13:50:49,358 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-18 13:50:49,359 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-18 13:50:49,359 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-18 13:50:49,359 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-18 13:50:49,359 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-18 13:50:49,359 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-18 13:50:49,359 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-18 13:50:49,359 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-18 13:50:49,359 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-18 13:50:49,360 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-18 13:50:49,360 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-18 13:50:49,360 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-18 13:50:49,360 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-18 13:50:49,360 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-18 13:50:49,360 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-18 13:50:49,360 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-18 13:50:49,361 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-18 13:50:49,361 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_d7f48a50-169e-4f4e-8213-3ae182cf1fec/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 -> e655d34f6b59f7cc9a55d4dc4dc525a41685abad [2018-11-18 13:50:49,384 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-18 13:50:49,393 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-18 13:50:49,396 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-18 13:50:49,397 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-18 13:50:49,397 INFO L276 PluginConnector]: CDTParser initialized [2018-11-18 13:50:49,398 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_d7f48a50-169e-4f4e-8213-3ae182cf1fec/bin-2019/utaipan/../../sv-benchmarks/c/loops/string_true-unreach-call_true-termination.i [2018-11-18 13:50:49,442 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_d7f48a50-169e-4f4e-8213-3ae182cf1fec/bin-2019/utaipan/data/1a71fb0b7/3136fa53e4df4773baf4854f02d392bd/FLAG5b1249d78 [2018-11-18 13:50:49,771 INFO L307 CDTParser]: Found 1 translation units. [2018-11-18 13:50:49,771 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_d7f48a50-169e-4f4e-8213-3ae182cf1fec/sv-benchmarks/c/loops/string_true-unreach-call_true-termination.i [2018-11-18 13:50:49,776 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_d7f48a50-169e-4f4e-8213-3ae182cf1fec/bin-2019/utaipan/data/1a71fb0b7/3136fa53e4df4773baf4854f02d392bd/FLAG5b1249d78 [2018-11-18 13:50:50,200 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_d7f48a50-169e-4f4e-8213-3ae182cf1fec/bin-2019/utaipan/data/1a71fb0b7/3136fa53e4df4773baf4854f02d392bd [2018-11-18 13:50:50,203 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-18 13:50:50,203 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-18 13:50:50,204 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-18 13:50:50,204 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-18 13:50:50,208 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-18 13:50:50,208 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 01:50:50" (1/1) ... [2018-11-18 13:50:50,211 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@65fdf8cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:50:50, skipping insertion in model container [2018-11-18 13:50:50,211 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 01:50:50" (1/1) ... [2018-11-18 13:50:50,217 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-18 13:50:50,234 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-18 13:50:50,340 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 13:50:50,342 INFO L191 MainTranslator]: Completed pre-run [2018-11-18 13:50:50,357 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 13:50:50,369 INFO L195 MainTranslator]: Completed translation [2018-11-18 13:50:50,369 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:50:50 WrapperNode [2018-11-18 13:50:50,369 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-18 13:50:50,369 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-18 13:50:50,369 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-18 13:50:50,370 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-18 13:50:50,374 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:50:50" (1/1) ... [2018-11-18 13:50:50,379 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:50:50" (1/1) ... [2018-11-18 13:50:50,383 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-18 13:50:50,383 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-18 13:50:50,383 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-18 13:50:50,383 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-18 13:50:50,389 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:50:50" (1/1) ... [2018-11-18 13:50:50,389 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:50:50" (1/1) ... [2018-11-18 13:50:50,390 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:50:50" (1/1) ... [2018-11-18 13:50:50,390 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:50:50" (1/1) ... [2018-11-18 13:50:50,395 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:50:50" (1/1) ... [2018-11-18 13:50:50,398 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:50:50" (1/1) ... [2018-11-18 13:50:50,398 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:50:50" (1/1) ... [2018-11-18 13:50:50,400 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-18 13:50:50,400 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-18 13:50:50,400 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-18 13:50:50,400 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-18 13:50:50,401 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:50:50" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d7f48a50-169e-4f4e-8213-3ae182cf1fec/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 13:50:50,468 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2018-11-18 13:50:50,469 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-18 13:50:50,469 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-18 13:50:50,469 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-11-18 13:50:50,469 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-18 13:50:50,469 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-18 13:50:50,469 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2018-11-18 13:50:50,469 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-18 13:50:50,469 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-18 13:50:50,470 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-11-18 13:50:50,470 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-11-18 13:50:50,470 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-11-18 13:50:50,643 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-18 13:50:50,644 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 01:50:50 BoogieIcfgContainer [2018-11-18 13:50:50,644 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-18 13:50:50,645 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-18 13:50:50,645 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-18 13:50:50,646 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-18 13:50:50,646 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 01:50:50" (1/3) ... [2018-11-18 13:50:50,647 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11e597d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 01:50:50, skipping insertion in model container [2018-11-18 13:50:50,647 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:50:50" (2/3) ... [2018-11-18 13:50:50,647 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11e597d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 01:50:50, skipping insertion in model container [2018-11-18 13:50:50,647 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 01:50:50" (3/3) ... [2018-11-18 13:50:50,649 INFO L112 eAbstractionObserver]: Analyzing ICFG string_true-unreach-call_true-termination.i [2018-11-18 13:50:50,655 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-18 13:50:50,659 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-18 13:50:50,670 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-18 13:50:50,692 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-18 13:50:50,693 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-18 13:50:50,693 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-18 13:50:50,693 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-18 13:50:50,693 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-18 13:50:50,693 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-18 13:50:50,693 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-18 13:50:50,693 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-18 13:50:50,707 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states. [2018-11-18 13:50:50,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-11-18 13:50:50,711 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 13:50:50,711 INFO L375 BasicCegarLoop]: trace histogram [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 13:50:50,712 INFO L423 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 13:50:50,716 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 13:50:50,716 INFO L82 PathProgramCache]: Analyzing trace with hash -1091547452, now seen corresponding path program 1 times [2018-11-18 13:50:50,717 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 13:50:50,747 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:50:50,747 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 13:50:50,747 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:50:50,747 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 13:50:50,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:50:50,795 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 13:50:50,796 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 13:50:50,797 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-11-18 13:50:50,797 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 13:50:50,800 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-11-18 13:50:50,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-11-18 13:50:50,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-11-18 13:50:50,810 INFO L87 Difference]: Start difference. First operand 40 states. Second operand 2 states. [2018-11-18 13:50:50,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 13:50:50,828 INFO L93 Difference]: Finished difference Result 71 states and 98 transitions. [2018-11-18 13:50:50,828 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-11-18 13:50:50,829 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 22 [2018-11-18 13:50:50,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 13:50:50,834 INFO L225 Difference]: With dead ends: 71 [2018-11-18 13:50:50,834 INFO L226 Difference]: Without dead ends: 33 [2018-11-18 13:50:50,836 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-11-18 13:50:50,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-11-18 13:50:50,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-11-18 13:50:50,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-11-18 13:50:50,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2018-11-18 13:50:50,858 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 22 [2018-11-18 13:50:50,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 13:50:50,858 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2018-11-18 13:50:50,859 INFO L481 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-11-18 13:50:50,859 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2018-11-18 13:50:50,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-11-18 13:50:50,859 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 13:50:50,860 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 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 13:50:50,860 INFO L423 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 13:50:50,860 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 13:50:50,860 INFO L82 PathProgramCache]: Analyzing trace with hash 499356089, now seen corresponding path program 1 times [2018-11-18 13:50:50,860 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 13:50:50,861 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:50:50,861 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 13:50:50,862 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:50:50,862 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 13:50:50,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:50:50,904 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 13:50:50,904 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 13:50:50,904 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-18 13:50:50,904 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 13:50:50,906 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-18 13:50:50,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-18 13:50:50,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-18 13:50:50,906 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand 3 states. [2018-11-18 13:50:50,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 13:50:50,961 INFO L93 Difference]: Finished difference Result 68 states and 81 transitions. [2018-11-18 13:50:50,962 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-18 13:50:50,962 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2018-11-18 13:50:50,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 13:50:50,964 INFO L225 Difference]: With dead ends: 68 [2018-11-18 13:50:50,964 INFO L226 Difference]: Without dead ends: 44 [2018-11-18 13:50:50,965 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-18 13:50:50,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-11-18 13:50:50,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2018-11-18 13:50:50,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-11-18 13:50:50,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2018-11-18 13:50:50,971 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 29 [2018-11-18 13:50:50,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 13:50:50,971 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2018-11-18 13:50:50,971 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-18 13:50:50,971 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2018-11-18 13:50:50,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-11-18 13:50:50,972 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 13:50:50,972 INFO L375 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 13:50:50,972 INFO L423 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 13:50:50,972 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 13:50:50,972 INFO L82 PathProgramCache]: Analyzing trace with hash -1017977548, now seen corresponding path program 1 times [2018-11-18 13:50:50,973 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 13:50:50,973 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:50:50,974 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 13:50:50,974 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:50:50,974 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 13:50:50,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:50:51,026 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-18 13:50:51,027 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 13:50:51,027 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 13:50:51,027 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 36 with the following transitions: [2018-11-18 13:50:51,029 INFO L202 CegarAbsIntRunner]: [0], [1], [5], [9], [12], [14], [16], [20], [24], [28], [31], [33], [35], [39], [43], [47], [49], [52], [58], [62], [64], [67], [76], [80], [84], [96], [100], [103], [105], [111], [112], [113], [115] [2018-11-18 13:50:51,049 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-18 13:50:51,049 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-18 13:50:51,193 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-18 13:50:51,194 INFO L272 AbstractInterpreter]: Visited 33 different actions 53 times. Merged at 6 different actions 15 times. Never widened. Performed 209 root evaluator evaluations with a maximum evaluation depth of 6. Performed 209 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 3 fixpoints after 3 different actions. Largest state had 27 variables. [2018-11-18 13:50:51,198 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 13:50:51,199 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-18 13:50:51,199 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 13:50:51,199 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d7f48a50-169e-4f4e-8213-3ae182cf1fec/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 13:50:51,207 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 13:50:51,207 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-18 13:50:51,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:50:51,251 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 13:50:51,269 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-18 13:50:51,270 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 13:50:51,294 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-18 13:50:51,319 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-18 13:50:51,319 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2018-11-18 13:50:51,319 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 13:50:51,320 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-18 13:50:51,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-18 13:50:51,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-11-18 13:50:51,320 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand 5 states. [2018-11-18 13:50:51,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 13:50:51,384 INFO L93 Difference]: Finished difference Result 81 states and 96 transitions. [2018-11-18 13:50:51,384 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-18 13:50:51,384 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 35 [2018-11-18 13:50:51,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 13:50:51,385 INFO L225 Difference]: With dead ends: 81 [2018-11-18 13:50:51,385 INFO L226 Difference]: Without dead ends: 55 [2018-11-18 13:50:51,385 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-11-18 13:50:51,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-11-18 13:50:51,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 43. [2018-11-18 13:50:51,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-11-18 13:50:51,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 48 transitions. [2018-11-18 13:50:51,389 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 48 transitions. Word has length 35 [2018-11-18 13:50:51,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 13:50:51,389 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 48 transitions. [2018-11-18 13:50:51,389 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-18 13:50:51,389 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 48 transitions. [2018-11-18 13:50:51,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-11-18 13:50:51,390 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 13:50:51,390 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 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, 1, 1, 1, 1] [2018-11-18 13:50:51,390 INFO L423 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 13:50:51,391 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 13:50:51,391 INFO L82 PathProgramCache]: Analyzing trace with hash -520435943, now seen corresponding path program 2 times [2018-11-18 13:50:51,391 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 13:50:51,391 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:50:51,391 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 13:50:51,392 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:50:51,392 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 13:50:51,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:50:51,431 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-11-18 13:50:51,432 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 13:50:51,432 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 13:50:51,432 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-18 13:50:51,432 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-18 13:50:51,432 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 13:50:51,432 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d7f48a50-169e-4f4e-8213-3ae182cf1fec/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 13:50:51,441 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-18 13:50:51,441 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-11-18 13:50:51,453 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2018-11-18 13:50:51,453 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 13:50:51,455 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 13:50:51,497 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2018-11-18 13:50:51,498 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 13:50:51,543 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2018-11-18 13:50:51,558 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-11-18 13:50:51,558 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7, 5] imperfect sequences [5] total 13 [2018-11-18 13:50:51,558 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 13:50:51,559 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-18 13:50:51,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-18 13:50:51,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2018-11-18 13:50:51,559 INFO L87 Difference]: Start difference. First operand 43 states and 48 transitions. Second operand 7 states. [2018-11-18 13:50:51,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 13:50:51,606 INFO L93 Difference]: Finished difference Result 62 states and 70 transitions. [2018-11-18 13:50:51,606 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-18 13:50:51,606 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 41 [2018-11-18 13:50:51,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 13:50:51,607 INFO L225 Difference]: With dead ends: 62 [2018-11-18 13:50:51,607 INFO L226 Difference]: Without dead ends: 46 [2018-11-18 13:50:51,607 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2018-11-18 13:50:51,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-11-18 13:50:51,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2018-11-18 13:50:51,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-11-18 13:50:51,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2018-11-18 13:50:51,610 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 41 [2018-11-18 13:50:51,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 13:50:51,611 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2018-11-18 13:50:51,611 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-18 13:50:51,611 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2018-11-18 13:50:51,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-11-18 13:50:51,611 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 13:50:51,612 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 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, 1, 1, 1] [2018-11-18 13:50:51,612 INFO L423 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 13:50:51,612 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 13:50:51,612 INFO L82 PathProgramCache]: Analyzing trace with hash 2018152364, now seen corresponding path program 1 times [2018-11-18 13:50:51,612 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 13:50:51,613 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:50:51,613 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 13:50:51,613 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:50:51,614 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 13:50:51,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:50:51,658 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-11-18 13:50:51,658 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 13:50:51,659 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 13:50:51,659 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 45 with the following transitions: [2018-11-18 13:50:51,659 INFO L202 CegarAbsIntRunner]: [0], [1], [5], [9], [12], [14], [16], [20], [24], [28], [31], [33], [35], [39], [43], [47], [49], [52], [58], [62], [64], [67], [69], [76], [80], [84], [96], [100], [103], [105], [111], [112], [113], [115] [2018-11-18 13:50:51,661 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-18 13:50:51,661 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-18 13:50:51,822 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-18 13:50:51,823 INFO L272 AbstractInterpreter]: Visited 34 different actions 120 times. Merged at 23 different actions 64 times. Widened at 1 different actions 1 times. Performed 547 root evaluator evaluations with a maximum evaluation depth of 6. Performed 547 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 9 fixpoints after 7 different actions. Largest state had 28 variables. [2018-11-18 13:50:51,833 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 13:50:51,834 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-18 13:50:51,834 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 13:50:51,834 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d7f48a50-169e-4f4e-8213-3ae182cf1fec/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 13:50:51,846 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 13:50:51,847 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-18 13:50:51,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:50:51,871 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 13:50:51,881 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-11-18 13:50:51,881 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 13:50:51,906 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-11-18 13:50:51,930 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-18 13:50:51,930 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2018-11-18 13:50:51,931 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 13:50:51,931 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-18 13:50:51,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-18 13:50:51,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-11-18 13:50:51,932 INFO L87 Difference]: Start difference. First operand 46 states and 51 transitions. Second operand 6 states. [2018-11-18 13:50:52,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 13:50:52,021 INFO L93 Difference]: Finished difference Result 101 states and 118 transitions. [2018-11-18 13:50:52,022 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-18 13:50:52,022 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 44 [2018-11-18 13:50:52,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 13:50:52,023 INFO L225 Difference]: With dead ends: 101 [2018-11-18 13:50:52,023 INFO L226 Difference]: Without dead ends: 69 [2018-11-18 13:50:52,024 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-11-18 13:50:52,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-11-18 13:50:52,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 52. [2018-11-18 13:50:52,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-11-18 13:50:52,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 57 transitions. [2018-11-18 13:50:52,029 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 57 transitions. Word has length 44 [2018-11-18 13:50:52,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 13:50:52,029 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 57 transitions. [2018-11-18 13:50:52,029 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-18 13:50:52,029 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 57 transitions. [2018-11-18 13:50:52,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-11-18 13:50:52,030 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 13:50:52,030 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 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, 1, 1, 1] [2018-11-18 13:50:52,031 INFO L423 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 13:50:52,032 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 13:50:52,032 INFO L82 PathProgramCache]: Analyzing trace with hash -1376702831, now seen corresponding path program 2 times [2018-11-18 13:50:52,032 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 13:50:52,033 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:50:52,033 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 13:50:52,033 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:50:52,033 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 13:50:52,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:50:52,095 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-11-18 13:50:52,095 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 13:50:52,095 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 13:50:52,095 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-18 13:50:52,095 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-18 13:50:52,096 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 13:50:52,096 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d7f48a50-169e-4f4e-8213-3ae182cf1fec/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 13:50:52,101 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-18 13:50:52,101 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-11-18 13:50:52,117 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2018-11-18 13:50:52,118 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 13:50:52,120 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 13:50:52,156 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2018-11-18 13:50:52,156 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 13:50:52,176 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2018-11-18 13:50:52,191 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-11-18 13:50:52,191 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [6] total 11 [2018-11-18 13:50:52,191 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 13:50:52,191 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-18 13:50:52,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-18 13:50:52,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2018-11-18 13:50:52,192 INFO L87 Difference]: Start difference. First operand 52 states and 57 transitions. Second operand 5 states. [2018-11-18 13:50:52,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 13:50:52,207 INFO L93 Difference]: Finished difference Result 52 states and 57 transitions. [2018-11-18 13:50:52,207 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-18 13:50:52,207 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 50 [2018-11-18 13:50:52,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 13:50:52,208 INFO L225 Difference]: With dead ends: 52 [2018-11-18 13:50:52,208 INFO L226 Difference]: Without dead ends: 0 [2018-11-18 13:50:52,208 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2018-11-18 13:50:52,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-11-18 13:50:52,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-11-18 13:50:52,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-11-18 13:50:52,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-11-18 13:50:52,209 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 50 [2018-11-18 13:50:52,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 13:50:52,209 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-18 13:50:52,209 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-18 13:50:52,209 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-11-18 13:50:52,209 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-11-18 13:50:52,212 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-11-18 13:50:52,264 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2018-11-18 13:50:52,264 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: true [2018-11-18 13:50:52,264 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-11-18 13:50:52,264 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-11-18 13:50:52,264 INFO L428 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-11-18 13:50:52,264 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-11-18 13:50:52,265 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-11-18 13:50:52,265 INFO L425 ceAbstractionStarter]: For program point mainEXIT(lines 14 58) no Hoare annotation was computed. [2018-11-18 13:50:52,265 INFO L425 ceAbstractionStarter]: For program point L23-1(lines 23 24) no Hoare annotation was computed. [2018-11-18 13:50:52,265 INFO L425 ceAbstractionStarter]: For program point L23-3(lines 23 24) no Hoare annotation was computed. [2018-11-18 13:50:52,265 INFO L421 ceAbstractionStarter]: At program point L23-4(lines 23 24) the Hoare annotation is: (or (= 0 main_~found~0) (= 1 main_~found~0)) [2018-11-18 13:50:52,265 INFO L425 ceAbstractionStarter]: For program point L19-1(lines 19 20) no Hoare annotation was computed. [2018-11-18 13:50:52,265 INFO L425 ceAbstractionStarter]: For program point L23-5(lines 23 24) no Hoare annotation was computed. [2018-11-18 13:50:52,265 INFO L425 ceAbstractionStarter]: For program point L19-3(lines 19 20) no Hoare annotation was computed. [2018-11-18 13:50:52,266 INFO L421 ceAbstractionStarter]: At program point L19-4(lines 19 20) the Hoare annotation is: (or (= 0 main_~found~0) (= 1 main_~found~0)) [2018-11-18 13:50:52,266 INFO L425 ceAbstractionStarter]: For program point L19-5(lines 19 20) no Hoare annotation was computed. [2018-11-18 13:50:52,266 INFO L425 ceAbstractionStarter]: For program point L32-1(lines 32 33) no Hoare annotation was computed. [2018-11-18 13:50:52,266 INFO L425 ceAbstractionStarter]: For program point L32-2(lines 32 33) no Hoare annotation was computed. [2018-11-18 13:50:52,266 INFO L421 ceAbstractionStarter]: At program point L32-4(lines 32 33) the Hoare annotation is: (or (= 0 main_~found~0) (= 1 main_~found~0)) [2018-11-18 13:50:52,266 INFO L425 ceAbstractionStarter]: For program point L28-1(lines 28 29) no Hoare annotation was computed. [2018-11-18 13:50:52,266 INFO L425 ceAbstractionStarter]: For program point L32-5(lines 15 58) no Hoare annotation was computed. [2018-11-18 13:50:52,266 INFO L425 ceAbstractionStarter]: For program point L28-2(lines 28 29) no Hoare annotation was computed. [2018-11-18 13:50:52,266 INFO L421 ceAbstractionStarter]: At program point L28-4(lines 28 29) the Hoare annotation is: (or (= 0 main_~found~0) (= 1 main_~found~0)) [2018-11-18 13:50:52,267 INFO L425 ceAbstractionStarter]: For program point L28-5(lines 28 29) no Hoare annotation was computed. [2018-11-18 13:50:52,267 INFO L425 ceAbstractionStarter]: For program point L41(lines 41 50) no Hoare annotation was computed. [2018-11-18 13:50:52,267 INFO L421 ceAbstractionStarter]: At program point L41-2(lines 39 51) the Hoare annotation is: (or (= 0 main_~found~0) (= 1 main_~found~0) (and (<= 0 main_~j~0) (<= main_~nc_B~0 0))) [2018-11-18 13:50:52,267 INFO L425 ceAbstractionStarter]: For program point L25(line 25) no Hoare annotation was computed. [2018-11-18 13:50:52,267 INFO L425 ceAbstractionStarter]: For program point L21(line 21) no Hoare annotation was computed. [2018-11-18 13:50:52,267 INFO L425 ceAbstractionStarter]: For program point mainFINAL(lines 14 58) no Hoare annotation was computed. [2018-11-18 13:50:52,267 INFO L428 ceAbstractionStarter]: At program point mainENTRY(lines 14 58) the Hoare annotation is: true [2018-11-18 13:50:52,267 INFO L421 ceAbstractionStarter]: At program point L55(line 55) the Hoare annotation is: (or (= 0 main_~found~0) (= 1 main_~found~0)) [2018-11-18 13:50:52,267 INFO L425 ceAbstractionStarter]: For program point L55-1(line 55) no Hoare annotation was computed. [2018-11-18 13:50:52,267 INFO L425 ceAbstractionStarter]: For program point L39-1(lines 39 51) no Hoare annotation was computed. [2018-11-18 13:50:52,268 INFO L425 ceAbstractionStarter]: For program point L39-3(lines 39 51) no Hoare annotation was computed. [2018-11-18 13:50:52,268 INFO L428 ceAbstractionStarter]: At program point __VERIFIER_assertENTRY(lines 4 9) the Hoare annotation is: true [2018-11-18 13:50:52,268 INFO L425 ceAbstractionStarter]: For program point __VERIFIER_assertEXIT(lines 4 9) no Hoare annotation was computed. [2018-11-18 13:50:52,268 INFO L425 ceAbstractionStarter]: For program point L6(line 6) no Hoare annotation was computed. [2018-11-18 13:50:52,268 INFO L425 ceAbstractionStarter]: For program point L5(lines 5 7) no Hoare annotation was computed. [2018-11-18 13:50:52,268 INFO L425 ceAbstractionStarter]: For program point L5-2(lines 4 9) no Hoare annotation was computed. [2018-11-18 13:50:52,268 INFO L425 ceAbstractionStarter]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 6) no Hoare annotation was computed. [2018-11-18 13:50:52,278 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.11 01:50:52 BoogieIcfgContainer [2018-11-18 13:50:52,278 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-18 13:50:52,278 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-18 13:50:52,278 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-18 13:50:52,279 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-18 13:50:52,279 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 01:50:50" (3/4) ... [2018-11-18 13:50:52,281 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-11-18 13:50:52,284 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-11-18 13:50:52,284 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-11-18 13:50:52,285 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2018-11-18 13:50:52,287 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 29 nodes and edges [2018-11-18 13:50:52,287 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 14 nodes and edges [2018-11-18 13:50:52,287 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2018-11-18 13:50:52,288 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-11-18 13:50:52,327 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_d7f48a50-169e-4f4e-8213-3ae182cf1fec/bin-2019/utaipan/witness.graphml [2018-11-18 13:50:52,327 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-18 13:50:52,328 INFO L168 Benchmark]: Toolchain (without parser) took 2125.19 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 127.4 MB). Free memory was 960.9 MB in the beginning and 1.1 GB in the end (delta: -158.7 MB). Peak memory consumption was 232.1 MB. Max. memory is 11.5 GB. [2018-11-18 13:50:52,329 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 1.0 GB. Free memory is still 982.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 13:50:52,330 INFO L168 Benchmark]: CACSL2BoogieTranslator took 165.19 ms. Allocated memory is still 1.0 GB. Free memory was 960.9 MB in the beginning and 944.7 MB in the end (delta: 16.1 MB). Peak memory consumption was 16.1 MB. Max. memory is 11.5 GB. [2018-11-18 13:50:52,330 INFO L168 Benchmark]: Boogie Procedure Inliner took 13.64 ms. Allocated memory is still 1.0 GB. Free memory is still 944.7 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 13:50:52,330 INFO L168 Benchmark]: Boogie Preprocessor took 16.60 ms. Allocated memory is still 1.0 GB. Free memory is still 944.7 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 13:50:52,330 INFO L168 Benchmark]: RCFGBuilder took 244.19 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 127.4 MB). Free memory was 944.7 MB in the beginning and 1.1 GB in the end (delta: -160.3 MB). Peak memory consumption was 14.6 MB. Max. memory is 11.5 GB. [2018-11-18 13:50:52,331 INFO L168 Benchmark]: TraceAbstraction took 1633.61 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 868.7 MB in the end (delta: 236.4 MB). Peak memory consumption was 236.4 MB. Max. memory is 11.5 GB. [2018-11-18 13:50:52,331 INFO L168 Benchmark]: Witness Printer took 49.19 ms. Allocated memory is still 1.2 GB. Free memory was 868.7 MB in the beginning and 1.1 GB in the end (delta: -250.9 MB). Peak memory consumption was 12.6 MB. Max. memory is 11.5 GB. [2018-11-18 13:50:52,333 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 982.9 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 165.19 ms. Allocated memory is still 1.0 GB. Free memory was 960.9 MB in the beginning and 944.7 MB in the end (delta: 16.1 MB). Peak memory consumption was 16.1 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 13.64 ms. Allocated memory is still 1.0 GB. Free memory is still 944.7 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 16.60 ms. Allocated memory is still 1.0 GB. Free memory is still 944.7 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 244.19 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 127.4 MB). Free memory was 944.7 MB in the beginning and 1.1 GB in the end (delta: -160.3 MB). Peak memory consumption was 14.6 MB. Max. memory is 11.5 GB. * TraceAbstraction took 1633.61 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 868.7 MB in the end (delta: 236.4 MB). Peak memory consumption was 236.4 MB. Max. memory is 11.5 GB. * Witness Printer took 49.19 ms. Allocated memory is still 1.2 GB. Free memory was 868.7 MB in the beginning and 1.1 GB in the end (delta: -250.9 MB). Peak memory consumption was 12.6 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 6]: 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: 32]: Loop Invariant Derived loop invariant: 0 == found || 1 == found - InvariantResult [Line: 39]: Loop Invariant Derived loop invariant: (0 == found || 1 == found) || (0 <= j && nc_B <= 0) - InvariantResult [Line: 28]: Loop Invariant Derived loop invariant: 0 == found || 1 == found - InvariantResult [Line: 23]: Loop Invariant Derived loop invariant: 0 == found || 1 == found - InvariantResult [Line: 19]: Loop Invariant Derived loop invariant: 0 == found || 1 == found - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 40 locations, 1 error locations. SAFE Result, 1.5s OverallTime, 6 OverallIterations, 4 TraceHistogramMax, 0.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 205 SDtfs, 75 SDslu, 384 SDs, 0 SdLazy, 149 SolverSat, 19 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 364 GetRequests, 328 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=52occurred 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, 2 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 6 MinimizatonAttempts, 36 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 11 LocationsWithAnnotation, 17 PreInvPairs, 31 NumberOfFragments, 54 HoareAnnotationTreeSize, 17 FomulaSimplifications, 87 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 11 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 391 NumberOfCodeBlocks, 358 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 547 ConstructedInterpolants, 0 QuantifiedInterpolants, 29995 SizeOfPredicates, 12 NumberOfNonLiveVariables, 404 ConjunctsInSsa, 25 ConjunctsInUnsatCore, 14 InterpolantComputations, 6 PerfectInterpolantSequences, 155/204 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...