./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-lit/gj2007b_true-unreach-call_true-termination.c.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 635dfa2a Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_50188065-a5c6-4522-8ac8-148d2ce403f8/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_50188065-a5c6-4522-8ac8-148d2ce403f8/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_50188065-a5c6-4522-8ac8-148d2ce403f8/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_50188065-a5c6-4522-8ac8-148d2ce403f8/bin-2019/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-lit/gj2007b_true-unreach-call_true-termination.c.i -s /tmp/vcloud-vcloud-master/worker/working_dir_50188065-a5c6-4522-8ac8-148d2ce403f8/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_50188065-a5c6-4522-8ac8-148d2ce403f8/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 1e17546c38a51643b6e392ce04436e766214299e ...................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-635dfa2 [2018-12-08 15:44:47,242 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-08 15:44:47,243 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-08 15:44:47,249 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-08 15:44:47,249 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-08 15:44:47,250 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-08 15:44:47,250 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-08 15:44:47,251 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-08 15:44:47,252 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-08 15:44:47,252 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-08 15:44:47,253 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-08 15:44:47,253 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-08 15:44:47,254 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-08 15:44:47,254 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-08 15:44:47,255 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-08 15:44:47,256 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-08 15:44:47,256 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-08 15:44:47,257 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-08 15:44:47,259 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-08 15:44:47,260 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-08 15:44:47,261 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-08 15:44:47,262 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-08 15:44:47,263 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-12-08 15:44:47,264 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-08 15:44:47,264 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-08 15:44:47,264 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-08 15:44:47,265 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-08 15:44:47,266 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-08 15:44:47,266 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-08 15:44:47,267 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-08 15:44:47,267 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-08 15:44:47,268 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-08 15:44:47,268 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-08 15:44:47,268 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-08 15:44:47,269 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-08 15:44:47,270 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-08 15:44:47,270 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_50188065-a5c6-4522-8ac8-148d2ce403f8/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2018-12-08 15:44:47,280 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-08 15:44:47,281 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-08 15:44:47,281 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-08 15:44:47,281 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-12-08 15:44:47,281 INFO L133 SettingsManager]: * User list type=DISABLED [2018-12-08 15:44:47,282 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-12-08 15:44:47,282 INFO L133 SettingsManager]: * Explicit value domain=true [2018-12-08 15:44:47,282 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-12-08 15:44:47,282 INFO L133 SettingsManager]: * Octagon Domain=false [2018-12-08 15:44:47,282 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-12-08 15:44:47,282 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-12-08 15:44:47,282 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-12-08 15:44:47,282 INFO L133 SettingsManager]: * Interval Domain=false [2018-12-08 15:44:47,283 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-08 15:44:47,283 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-08 15:44:47,283 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-08 15:44:47,283 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-08 15:44:47,283 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-08 15:44:47,283 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-12-08 15:44:47,284 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-08 15:44:47,284 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-12-08 15:44:47,284 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-08 15:44:47,284 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-08 15:44:47,284 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-12-08 15:44:47,284 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-08 15:44:47,284 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-08 15:44:47,284 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-12-08 15:44:47,285 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-08 15:44:47,285 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-08 15:44:47,285 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-08 15:44:47,285 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-08 15:44:47,285 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-12-08 15:44:47,285 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-12-08 15:44:47,285 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-08 15:44:47,285 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-12-08 15:44:47,285 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-12-08 15:44:47,285 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_50188065-a5c6-4522-8ac8-148d2ce403f8/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 -> 1e17546c38a51643b6e392ce04436e766214299e [2018-12-08 15:44:47,308 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-08 15:44:47,314 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-08 15:44:47,316 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-08 15:44:47,317 INFO L271 PluginConnector]: Initializing CDTParser... [2018-12-08 15:44:47,317 INFO L276 PluginConnector]: CDTParser initialized [2018-12-08 15:44:47,318 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_50188065-a5c6-4522-8ac8-148d2ce403f8/bin-2019/utaipan/../../sv-benchmarks/c/loop-lit/gj2007b_true-unreach-call_true-termination.c.i [2018-12-08 15:44:47,354 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_50188065-a5c6-4522-8ac8-148d2ce403f8/bin-2019/utaipan/data/aa395b3cb/c2c6f179f16c4518aa2c63377dae57dc/FLAGf5d47a33c [2018-12-08 15:44:47,684 INFO L307 CDTParser]: Found 1 translation units. [2018-12-08 15:44:47,685 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_50188065-a5c6-4522-8ac8-148d2ce403f8/sv-benchmarks/c/loop-lit/gj2007b_true-unreach-call_true-termination.c.i [2018-12-08 15:44:47,688 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_50188065-a5c6-4522-8ac8-148d2ce403f8/bin-2019/utaipan/data/aa395b3cb/c2c6f179f16c4518aa2c63377dae57dc/FLAGf5d47a33c [2018-12-08 15:44:48,090 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_50188065-a5c6-4522-8ac8-148d2ce403f8/bin-2019/utaipan/data/aa395b3cb/c2c6f179f16c4518aa2c63377dae57dc [2018-12-08 15:44:48,092 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-08 15:44:48,093 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-12-08 15:44:48,094 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-12-08 15:44:48,094 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-12-08 15:44:48,097 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-12-08 15:44:48,098 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.12 03:44:48" (1/1) ... [2018-12-08 15:44:48,100 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4af6adec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 03:44:48, skipping insertion in model container [2018-12-08 15:44:48,101 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.12 03:44:48" (1/1) ... [2018-12-08 15:44:48,107 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-12-08 15:44:48,116 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-12-08 15:44:48,203 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-08 15:44:48,205 INFO L191 MainTranslator]: Completed pre-run [2018-12-08 15:44:48,214 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-08 15:44:48,222 INFO L195 MainTranslator]: Completed translation [2018-12-08 15:44:48,222 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 03:44:48 WrapperNode [2018-12-08 15:44:48,222 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-12-08 15:44:48,222 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-08 15:44:48,222 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-08 15:44:48,223 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-08 15:44:48,227 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 03:44:48" (1/1) ... [2018-12-08 15:44:48,230 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 03:44:48" (1/1) ... [2018-12-08 15:44:48,234 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-08 15:44:48,234 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-08 15:44:48,234 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-08 15:44:48,234 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-08 15:44:48,239 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 03:44:48" (1/1) ... [2018-12-08 15:44:48,239 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 03:44:48" (1/1) ... [2018-12-08 15:44:48,239 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 03:44:48" (1/1) ... [2018-12-08 15:44:48,240 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 03:44:48" (1/1) ... [2018-12-08 15:44:48,241 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 03:44:48" (1/1) ... [2018-12-08 15:44:48,244 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 03:44:48" (1/1) ... [2018-12-08 15:44:48,245 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 03:44:48" (1/1) ... [2018-12-08 15:44:48,245 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-08 15:44:48,245 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-08 15:44:48,246 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-08 15:44:48,246 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-08 15:44:48,246 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 03:44:48" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_50188065-a5c6-4522-8ac8-148d2ce403f8/bin-2019/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-08 15:44:48,307 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-12-08 15:44:48,307 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-12-08 15:44:48,307 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-08 15:44:48,307 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-08 15:44:48,307 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-12-08 15:44:48,307 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-12-08 15:44:48,307 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-12-08 15:44:48,307 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-12-08 15:44:48,386 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-08 15:44:48,386 INFO L280 CfgBuilder]: Removed 1 assue(true) statements. [2018-12-08 15:44:48,387 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.12 03:44:48 BoogieIcfgContainer [2018-12-08 15:44:48,387 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-08 15:44:48,387 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-08 15:44:48,387 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-08 15:44:48,390 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-08 15:44:48,390 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.12 03:44:48" (1/3) ... [2018-12-08 15:44:48,391 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e8df005 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.12 03:44:48, skipping insertion in model container [2018-12-08 15:44:48,391 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 03:44:48" (2/3) ... [2018-12-08 15:44:48,391 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e8df005 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.12 03:44:48, skipping insertion in model container [2018-12-08 15:44:48,391 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.12 03:44:48" (3/3) ... [2018-12-08 15:44:48,393 INFO L112 eAbstractionObserver]: Analyzing ICFG gj2007b_true-unreach-call_true-termination.c.i [2018-12-08 15:44:48,401 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-08 15:44:48,407 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-12-08 15:44:48,421 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-12-08 15:44:48,441 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-08 15:44:48,442 INFO L383 AbstractCegarLoop]: Hoare is true [2018-12-08 15:44:48,442 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-08 15:44:48,442 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-08 15:44:48,442 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-08 15:44:48,442 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-08 15:44:48,442 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-08 15:44:48,442 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-08 15:44:48,452 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2018-12-08 15:44:48,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-12-08 15:44:48,455 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 15:44:48,456 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 15:44:48,457 INFO L423 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 15:44:48,460 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 15:44:48,460 INFO L82 PathProgramCache]: Analyzing trace with hash -2009018560, now seen corresponding path program 1 times [2018-12-08 15:44:48,462 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-08 15:44:48,491 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 15:44:48,491 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 15:44:48,491 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 15:44:48,491 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-08 15:44:48,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 15:44:48,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 15:44:48,527 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-08 15:44:48,528 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-12-08 15:44:48,528 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-08 15:44:48,530 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-12-08 15:44:48,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-12-08 15:44:48,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-12-08 15:44:48,539 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 2 states. [2018-12-08 15:44:48,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 15:44:48,551 INFO L93 Difference]: Finished difference Result 34 states and 41 transitions. [2018-12-08 15:44:48,551 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-12-08 15:44:48,552 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2018-12-08 15:44:48,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 15:44:48,557 INFO L225 Difference]: With dead ends: 34 [2018-12-08 15:44:48,558 INFO L226 Difference]: Without dead ends: 16 [2018-12-08 15:44:48,560 INFO L631 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 [2018-12-08 15:44:48,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-12-08 15:44:48,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-12-08 15:44:48,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-12-08 15:44:48,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2018-12-08 15:44:48,581 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 10 [2018-12-08 15:44:48,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 15:44:48,582 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2018-12-08 15:44:48,582 INFO L481 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-12-08 15:44:48,582 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2018-12-08 15:44:48,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-12-08 15:44:48,582 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 15:44:48,582 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 15:44:48,583 INFO L423 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 15:44:48,583 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 15:44:48,583 INFO L82 PathProgramCache]: Analyzing trace with hash -2019177291, now seen corresponding path program 1 times [2018-12-08 15:44:48,583 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-08 15:44:48,584 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 15:44:48,584 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 15:44:48,584 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 15:44:48,584 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-08 15:44:48,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 15:44:48,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 15:44:48,621 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-08 15:44:48,621 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-12-08 15:44:48,621 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-08 15:44:48,622 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-08 15:44:48,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-08 15:44:48,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-08 15:44:48,623 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 5 states. [2018-12-08 15:44:48,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 15:44:48,649 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2018-12-08 15:44:48,649 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-08 15:44:48,649 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2018-12-08 15:44:48,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 15:44:48,650 INFO L225 Difference]: With dead ends: 27 [2018-12-08 15:44:48,650 INFO L226 Difference]: Without dead ends: 25 [2018-12-08 15:44:48,650 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-12-08 15:44:48,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-12-08 15:44:48,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2018-12-08 15:44:48,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-12-08 15:44:48,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2018-12-08 15:44:48,654 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 10 [2018-12-08 15:44:48,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 15:44:48,654 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2018-12-08 15:44:48,654 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-08 15:44:48,654 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2018-12-08 15:44:48,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-12-08 15:44:48,655 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 15:44:48,655 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 15:44:48,655 INFO L423 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 15:44:48,655 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 15:44:48,655 INFO L82 PathProgramCache]: Analyzing trace with hash -1543015754, now seen corresponding path program 1 times [2018-12-08 15:44:48,655 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-08 15:44:48,656 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 15:44:48,656 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 15:44:48,656 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 15:44:48,656 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-08 15:44:48,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 15:44:48,688 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 15:44:48,689 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 15:44:48,689 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-08 15:44:48,689 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 14 with the following transitions: [2018-12-08 15:44:48,690 INFO L205 CegarAbsIntRunner]: [0], [4], [11], [13], [16], [20], [28], [31], [33], [39], [40], [41], [43] [2018-12-08 15:44:48,709 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-08 15:44:48,709 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-08 15:44:48,809 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-08 15:44:48,810 INFO L272 AbstractInterpreter]: Visited 13 different actions 36 times. Merged at 4 different actions 11 times. Widened at 1 different actions 1 times. Performed 118 root evaluator evaluations with a maximum evaluation depth of 4. Performed 118 inverse root evaluator evaluations with a maximum inverse evaluation depth of 4. Found 1 fixpoints after 1 different actions. Largest state had 5 variables. [2018-12-08 15:44:48,815 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 15:44:48,815 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-08 15:44:48,815 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 15:44:48,815 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_50188065-a5c6-4522-8ac8-148d2ce403f8/bin-2019/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-08 15:44:48,822 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 15:44:48,822 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-08 15:44:48,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 15:44:48,836 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 15:44:48,860 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 15:44:48,860 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-08 15:44:48,882 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 15:44:48,897 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-08 15:44:48,897 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 8 [2018-12-08 15:44:48,897 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-08 15:44:48,897 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-08 15:44:48,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-08 15:44:48,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2018-12-08 15:44:48,897 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 6 states. [2018-12-08 15:44:48,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 15:44:48,935 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2018-12-08 15:44:48,936 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-08 15:44:48,936 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2018-12-08 15:44:48,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 15:44:48,937 INFO L225 Difference]: With dead ends: 30 [2018-12-08 15:44:48,937 INFO L226 Difference]: Without dead ends: 26 [2018-12-08 15:44:48,937 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2018-12-08 15:44:48,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-12-08 15:44:48,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 18. [2018-12-08 15:44:48,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-12-08 15:44:48,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2018-12-08 15:44:48,940 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2018-12-08 15:44:48,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 15:44:48,940 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2018-12-08 15:44:48,940 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-08 15:44:48,940 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2018-12-08 15:44:48,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-12-08 15:44:48,941 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 15:44:48,941 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 15:44:48,941 INFO L423 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 15:44:48,941 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 15:44:48,941 INFO L82 PathProgramCache]: Analyzing trace with hash -595645528, now seen corresponding path program 1 times [2018-12-08 15:44:48,941 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-08 15:44:48,942 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 15:44:48,942 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 15:44:48,942 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 15:44:48,942 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-08 15:44:48,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 15:44:48,981 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 15:44:48,981 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 15:44:48,981 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-08 15:44:48,982 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 16 with the following transitions: [2018-12-08 15:44:48,982 INFO L205 CegarAbsIntRunner]: [0], [4], [11], [28], [31], [33], [36], [38], [39], [40], [41], [43], [44], [45] [2018-12-08 15:44:48,983 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-08 15:44:48,983 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-08 15:44:48,995 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-08 15:44:48,995 INFO L272 AbstractInterpreter]: Visited 14 different actions 19 times. Never merged. Never widened. Performed 28 root evaluator evaluations with a maximum evaluation depth of 5. Performed 28 inverse root evaluator evaluations with a maximum inverse evaluation depth of 5. Never found a fixpoint. Largest state had 4 variables. [2018-12-08 15:44:48,997 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 15:44:48,997 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-08 15:44:48,997 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 15:44:48,997 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_50188065-a5c6-4522-8ac8-148d2ce403f8/bin-2019/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-08 15:44:49,003 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 15:44:49,003 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-08 15:44:49,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 15:44:49,010 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 15:44:49,069 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 15:44:49,070 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-08 15:44:49,082 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 15:44:49,096 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-12-08 15:44:49,097 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [7] total 11 [2018-12-08 15:44:49,097 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-08 15:44:49,097 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-08 15:44:49,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-08 15:44:49,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2018-12-08 15:44:49,097 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 6 states. [2018-12-08 15:44:49,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 15:44:49,145 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2018-12-08 15:44:49,145 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-08 15:44:49,145 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2018-12-08 15:44:49,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 15:44:49,146 INFO L225 Difference]: With dead ends: 31 [2018-12-08 15:44:49,146 INFO L226 Difference]: Without dead ends: 21 [2018-12-08 15:44:49,146 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2018-12-08 15:44:49,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-12-08 15:44:49,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 19. [2018-12-08 15:44:49,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-12-08 15:44:49,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2018-12-08 15:44:49,148 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 15 [2018-12-08 15:44:49,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 15:44:49,149 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2018-12-08 15:44:49,149 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-08 15:44:49,149 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2018-12-08 15:44:49,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-12-08 15:44:49,149 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 15:44:49,149 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 15:44:49,149 INFO L423 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 15:44:49,149 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 15:44:49,149 INFO L82 PathProgramCache]: Analyzing trace with hash -1695932857, now seen corresponding path program 1 times [2018-12-08 15:44:49,149 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-08 15:44:49,150 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 15:44:49,150 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 15:44:49,150 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 15:44:49,150 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-08 15:44:49,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 15:44:49,197 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 15:44:49,197 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 15:44:49,197 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-08 15:44:49,197 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 19 with the following transitions: [2018-12-08 15:44:49,197 INFO L205 CegarAbsIntRunner]: [0], [4], [11], [13], [16], [20], [28], [31], [33], [36], [38], [39], [40], [41], [43], [44], [45] [2018-12-08 15:44:49,198 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-08 15:44:49,198 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-08 15:44:49,252 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-08 15:44:49,252 INFO L272 AbstractInterpreter]: Visited 17 different actions 72 times. Merged at 5 different actions 14 times. Widened at 1 different actions 1 times. Performed 162 root evaluator evaluations with a maximum evaluation depth of 5. Performed 162 inverse root evaluator evaluations with a maximum inverse evaluation depth of 5. Found 1 fixpoints after 1 different actions. Largest state had 5 variables. [2018-12-08 15:44:49,254 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 15:44:49,254 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-08 15:44:49,254 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 15:44:49,255 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_50188065-a5c6-4522-8ac8-148d2ce403f8/bin-2019/utaipan/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-08 15:44:49,261 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 15:44:49,261 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-08 15:44:49,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 15:44:49,267 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 15:44:49,315 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 15:44:49,315 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-08 15:44:49,380 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 15:44:49,394 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-12-08 15:44:49,394 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [9, 9] total 15 [2018-12-08 15:44:49,394 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-08 15:44:49,394 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-08 15:44:49,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-08 15:44:49,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2018-12-08 15:44:49,395 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 6 states. [2018-12-08 15:44:49,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 15:44:49,439 INFO L93 Difference]: Finished difference Result 19 states and 20 transitions. [2018-12-08 15:44:49,439 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-08 15:44:49,439 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2018-12-08 15:44:49,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 15:44:49,440 INFO L225 Difference]: With dead ends: 19 [2018-12-08 15:44:49,440 INFO L226 Difference]: Without dead ends: 0 [2018-12-08 15:44:49,440 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 29 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2018-12-08 15:44:49,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-12-08 15:44:49,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-12-08 15:44:49,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-12-08 15:44:49,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-12-08 15:44:49,441 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 18 [2018-12-08 15:44:49,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 15:44:49,441 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-12-08 15:44:49,441 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-08 15:44:49,441 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-12-08 15:44:49,441 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-12-08 15:44:49,444 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-12-08 15:44:49,482 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-12-08 15:44:49,482 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-12-08 15:44:49,482 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-12-08 15:44:49,482 INFO L451 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-12-08 15:44:49,482 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-12-08 15:44:49,482 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-12-08 15:44:49,482 INFO L451 ceAbstractionStarter]: At program point mainENTRY(lines 10 23) the Hoare annotation is: true [2018-12-08 15:44:49,482 INFO L448 ceAbstractionStarter]: For program point mainEXIT(lines 10 23) no Hoare annotation was computed. [2018-12-08 15:44:49,482 INFO L448 ceAbstractionStarter]: For program point L21(line 21) no Hoare annotation was computed. [2018-12-08 15:44:49,483 INFO L444 ceAbstractionStarter]: At program point L20(line 20) the Hoare annotation is: (and (<= 0 main_~m~0) (or (<= main_~n~0 0) (< main_~m~0 main_~n~0)) (<= 0 main_~x~0)) [2018-12-08 15:44:49,483 INFO L448 ceAbstractionStarter]: For program point L15(lines 15 17) no Hoare annotation was computed. [2018-12-08 15:44:49,483 INFO L448 ceAbstractionStarter]: For program point L15-2(lines 15 17) no Hoare annotation was computed. [2018-12-08 15:44:49,483 INFO L448 ceAbstractionStarter]: For program point mainFINAL(lines 10 23) no Hoare annotation was computed. [2018-12-08 15:44:49,483 INFO L444 ceAbstractionStarter]: At program point L14-2(lines 14 19) the Hoare annotation is: (and (<= 0 main_~m~0) (or (<= main_~n~0 0) (< main_~m~0 main_~n~0)) (<= 0 main_~x~0)) [2018-12-08 15:44:49,483 INFO L444 ceAbstractionStarter]: At program point L14-3(lines 14 19) the Hoare annotation is: (and (<= 0 main_~m~0) (or (<= main_~n~0 0) (< main_~m~0 main_~n~0)) (<= 0 main_~x~0)) [2018-12-08 15:44:49,483 INFO L451 ceAbstractionStarter]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2018-12-08 15:44:49,483 INFO L448 ceAbstractionStarter]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2018-12-08 15:44:49,483 INFO L448 ceAbstractionStarter]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2018-12-08 15:44:49,483 INFO L448 ceAbstractionStarter]: For program point L5(line 5) no Hoare annotation was computed. [2018-12-08 15:44:49,483 INFO L448 ceAbstractionStarter]: For program point L4(lines 4 6) no Hoare annotation was computed. [2018-12-08 15:44:49,483 INFO L448 ceAbstractionStarter]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2018-12-08 15:44:49,490 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 08.12 03:44:49 BoogieIcfgContainer [2018-12-08 15:44:49,490 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-12-08 15:44:49,491 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-12-08 15:44:49,491 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-12-08 15:44:49,491 INFO L276 PluginConnector]: Witness Printer initialized [2018-12-08 15:44:49,491 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.12 03:44:48" (3/4) ... [2018-12-08 15:44:49,493 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-12-08 15:44:49,496 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-12-08 15:44:49,497 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-12-08 15:44:49,497 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2018-12-08 15:44:49,499 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2018-12-08 15:44:49,499 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2018-12-08 15:44:49,499 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-12-08 15:44:49,522 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_50188065-a5c6-4522-8ac8-148d2ce403f8/bin-2019/utaipan/witness.graphml [2018-12-08 15:44:49,522 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-12-08 15:44:49,523 INFO L168 Benchmark]: Toolchain (without parser) took 1430.12 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 111.7 MB). Free memory was 956.7 MB in the beginning and 926.0 MB in the end (delta: 30.6 MB). Peak memory consumption was 142.3 MB. Max. memory is 11.5 GB. [2018-12-08 15:44:49,523 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 1.0 GB. Free memory is still 978.7 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-08 15:44:49,524 INFO L168 Benchmark]: CACSL2BoogieTranslator took 127.85 ms. Allocated memory is still 1.0 GB. Free memory was 956.7 MB in the beginning and 945.9 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-12-08 15:44:49,524 INFO L168 Benchmark]: Boogie Procedure Inliner took 11.23 ms. Allocated memory is still 1.0 GB. Free memory is still 945.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-08 15:44:49,524 INFO L168 Benchmark]: Boogie Preprocessor took 11.55 ms. Allocated memory is still 1.0 GB. Free memory is still 945.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-08 15:44:49,524 INFO L168 Benchmark]: RCFGBuilder took 141.34 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 111.7 MB). Free memory was 945.9 MB in the beginning and 1.1 GB in the end (delta: -149.5 MB). Peak memory consumption was 18.1 MB. Max. memory is 11.5 GB. [2018-12-08 15:44:49,524 INFO L168 Benchmark]: TraceAbstraction took 1103.12 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 926.0 MB in the end (delta: 169.4 MB). Peak memory consumption was 169.4 MB. Max. memory is 11.5 GB. [2018-12-08 15:44:49,525 INFO L168 Benchmark]: Witness Printer took 31.66 ms. Allocated memory is still 1.1 GB. Free memory is still 926.0 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-08 15:44:49,526 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 1.0 GB. Free memory is still 978.7 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 127.85 ms. Allocated memory is still 1.0 GB. Free memory was 956.7 MB in the beginning and 945.9 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 11.23 ms. Allocated memory is still 1.0 GB. Free memory is still 945.9 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 11.55 ms. Allocated memory is still 1.0 GB. Free memory is still 945.9 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 141.34 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 111.7 MB). Free memory was 945.9 MB in the beginning and 1.1 GB in the end (delta: -149.5 MB). Peak memory consumption was 18.1 MB. Max. memory is 11.5 GB. * TraceAbstraction took 1103.12 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 926.0 MB in the end (delta: 169.4 MB). Peak memory consumption was 169.4 MB. Max. memory is 11.5 GB. * Witness Printer took 31.66 ms. Allocated memory is still 1.1 GB. Free memory is still 926.0 MB. There was no memory consumed. 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: 14]: Loop Invariant Derived loop invariant: (0 <= m && (n <= 0 || m < n)) && 0 <= x - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 21 locations, 1 error locations. SAFE Result, 1.0s OverallTime, 5 OverallIterations, 2 TraceHistogramMax, 0.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 75 SDtfs, 32 SDslu, 164 SDs, 0 SdLazy, 97 SolverSat, 11 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 128 GetRequests, 82 SyntacticMatches, 8 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=24occurred in iteration=2, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.1s AbstIntTime, 3 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 11 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 13 PreInvPairs, 18 NumberOfFragments, 47 HoareAnnotationTreeSize, 13 FomulaSimplifications, 73 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 8 FomulaSimplificationsInter, 17 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 112 NumberOfCodeBlocks, 112 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 147 ConstructedInterpolants, 0 QuantifiedInterpolants, 5649 SizeOfPredicates, 13 NumberOfNonLiveVariables, 118 ConjunctsInSsa, 31 ConjunctsInUnsatCore, 11 InterpolantComputations, 5 PerfectInterpolantSequences, 10/18 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...