./Ultimate.py --spec ../../sv-benchmarks/c/ReachSafety.prp --file ../../sv-benchmarks/c/recursive-simple/sum_2x3_true-unreach-call_true-termination.c --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_77de7bc3-9141-4b58-83ad-228df445b117/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_77de7bc3-9141-4b58-83ad-228df445b117/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_77de7bc3-9141-4b58-83ad-228df445b117/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_77de7bc3-9141-4b58-83ad-228df445b117/bin-2019/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursive-simple/sum_2x3_true-unreach-call_true-termination.c -s /tmp/vcloud-vcloud-master/worker/working_dir_77de7bc3-9141-4b58-83ad-228df445b117/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_77de7bc3-9141-4b58-83ad-228df445b117/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 5484cff0bd7499490d21ca1aa6f81abc8cec50b0 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 16:17:57,291 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-18 16:17:57,293 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-18 16:17:57,301 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-18 16:17:57,301 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-18 16:17:57,302 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-18 16:17:57,303 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-18 16:17:57,304 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-18 16:17:57,305 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-18 16:17:57,306 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-18 16:17:57,306 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-18 16:17:57,306 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-18 16:17:57,307 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-18 16:17:57,308 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-18 16:17:57,308 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-18 16:17:57,309 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-18 16:17:57,310 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-18 16:17:57,311 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-18 16:17:57,312 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-18 16:17:57,313 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-18 16:17:57,313 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-18 16:17:57,314 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-18 16:17:57,316 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-18 16:17:57,316 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-18 16:17:57,316 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-18 16:17:57,317 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-18 16:17:57,317 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-18 16:17:57,318 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-18 16:17:57,318 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-18 16:17:57,319 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-18 16:17:57,319 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-18 16:17:57,320 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-18 16:17:57,320 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-18 16:17:57,320 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-18 16:17:57,321 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-18 16:17:57,321 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-18 16:17:57,321 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_77de7bc3-9141-4b58-83ad-228df445b117/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2018-11-18 16:17:57,330 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-18 16:17:57,330 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-18 16:17:57,331 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-18 16:17:57,331 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-18 16:17:57,331 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-18 16:17:57,332 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-18 16:17:57,332 INFO L133 SettingsManager]: * Explicit value domain=true [2018-11-18 16:17:57,332 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-18 16:17:57,332 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-18 16:17:57,332 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-18 16:17:57,332 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-18 16:17:57,333 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-18 16:17:57,333 INFO L133 SettingsManager]: * Interval Domain=false [2018-11-18 16:17:57,333 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-18 16:17:57,333 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-18 16:17:57,334 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-18 16:17:57,334 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-18 16:17:57,334 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-18 16:17:57,334 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-18 16:17:57,334 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-18 16:17:57,334 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-18 16:17:57,334 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-18 16:17:57,336 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-18 16:17:57,337 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-18 16:17:57,337 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-18 16:17:57,337 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-18 16:17:57,337 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-18 16:17:57,337 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-18 16:17:57,337 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-18 16:17:57,338 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-18 16:17:57,338 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-18 16:17:57,338 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-18 16:17:57,338 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-18 16:17:57,338 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-18 16:17:57,338 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-18 16:17:57,338 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-18 16:17:57,339 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-18 16:17:57,339 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_77de7bc3-9141-4b58-83ad-228df445b117/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 -> 5484cff0bd7499490d21ca1aa6f81abc8cec50b0 [2018-11-18 16:17:57,368 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-18 16:17:57,382 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-18 16:17:57,386 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-18 16:17:57,387 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-18 16:17:57,388 INFO L276 PluginConnector]: CDTParser initialized [2018-11-18 16:17:57,389 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_77de7bc3-9141-4b58-83ad-228df445b117/bin-2019/utaipan/../../sv-benchmarks/c/recursive-simple/sum_2x3_true-unreach-call_true-termination.c [2018-11-18 16:17:57,438 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_77de7bc3-9141-4b58-83ad-228df445b117/bin-2019/utaipan/data/51175665e/77ebfccc7ebf4c4985acb5e74d66b5c7/FLAGf3885bb78 [2018-11-18 16:17:57,822 INFO L307 CDTParser]: Found 1 translation units. [2018-11-18 16:17:57,823 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_77de7bc3-9141-4b58-83ad-228df445b117/sv-benchmarks/c/recursive-simple/sum_2x3_true-unreach-call_true-termination.c [2018-11-18 16:17:57,828 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_77de7bc3-9141-4b58-83ad-228df445b117/bin-2019/utaipan/data/51175665e/77ebfccc7ebf4c4985acb5e74d66b5c7/FLAGf3885bb78 [2018-11-18 16:17:57,841 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_77de7bc3-9141-4b58-83ad-228df445b117/bin-2019/utaipan/data/51175665e/77ebfccc7ebf4c4985acb5e74d66b5c7 [2018-11-18 16:17:57,843 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-18 16:17:57,845 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-18 16:17:57,845 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-18 16:17:57,846 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-18 16:17:57,849 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-18 16:17:57,850 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 04:17:57" (1/1) ... [2018-11-18 16:17:57,852 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@46663d2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 04:17:57, skipping insertion in model container [2018-11-18 16:17:57,853 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 04:17:57" (1/1) ... [2018-11-18 16:17:57,861 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-18 16:17:57,879 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-18 16:17:58,021 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 16:17:58,025 INFO L191 MainTranslator]: Completed pre-run [2018-11-18 16:17:58,038 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 16:17:58,052 INFO L195 MainTranslator]: Completed translation [2018-11-18 16:17:58,053 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 04:17:58 WrapperNode [2018-11-18 16:17:58,053 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-18 16:17:58,053 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-18 16:17:58,054 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-18 16:17:58,054 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-18 16:17:58,063 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 04:17:58" (1/1) ... [2018-11-18 16:17:58,068 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 04:17:58" (1/1) ... [2018-11-18 16:17:58,074 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-18 16:17:58,074 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-18 16:17:58,075 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-18 16:17:58,075 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-18 16:17:58,083 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 04:17:58" (1/1) ... [2018-11-18 16:17:58,083 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 04:17:58" (1/1) ... [2018-11-18 16:17:58,084 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 04:17:58" (1/1) ... [2018-11-18 16:17:58,084 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 04:17:58" (1/1) ... [2018-11-18 16:17:58,087 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 04:17:58" (1/1) ... [2018-11-18 16:17:58,091 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 04:17:58" (1/1) ... [2018-11-18 16:17:58,092 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 04:17:58" (1/1) ... [2018-11-18 16:17:58,093 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-18 16:17:58,094 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-18 16:17:58,094 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-18 16:17:58,094 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-18 16:17:58,095 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 04:17:58" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_77de7bc3-9141-4b58-83ad-228df445b117/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 16:17:58,182 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-18 16:17:58,183 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-18 16:17:58,183 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-18 16:17:58,183 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-18 16:17:58,183 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2018-11-18 16:17:58,183 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2018-11-18 16:17:58,183 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-18 16:17:58,183 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-18 16:17:58,298 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-18 16:17:58,298 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 04:17:58 BoogieIcfgContainer [2018-11-18 16:17:58,298 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-18 16:17:58,299 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-18 16:17:58,299 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-18 16:17:58,301 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-18 16:17:58,301 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 04:17:57" (1/3) ... [2018-11-18 16:17:58,302 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b901de4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 04:17:58, skipping insertion in model container [2018-11-18 16:17:58,302 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 04:17:58" (2/3) ... [2018-11-18 16:17:58,302 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b901de4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 04:17:58, skipping insertion in model container [2018-11-18 16:17:58,302 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 04:17:58" (3/3) ... [2018-11-18 16:17:58,303 INFO L112 eAbstractionObserver]: Analyzing ICFG sum_2x3_true-unreach-call_true-termination.c [2018-11-18 16:17:58,310 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-18 16:17:58,316 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-18 16:17:58,328 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-18 16:17:58,355 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-18 16:17:58,355 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-18 16:17:58,355 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-18 16:17:58,356 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-18 16:17:58,356 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-18 16:17:58,356 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-18 16:17:58,356 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-18 16:17:58,356 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-18 16:17:58,371 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2018-11-18 16:17:58,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-11-18 16:17:58,375 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 16:17:58,376 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 16:17:58,378 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 16:17:58,382 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 16:17:58,382 INFO L82 PathProgramCache]: Analyzing trace with hash 2001781660, now seen corresponding path program 1 times [2018-11-18 16:17:58,383 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 16:17:58,414 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 16:17:58,414 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 16:17:58,414 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 16:17:58,414 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 16:17:58,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 16:17:58,579 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 16:17:58,580 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 16:17:58,581 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-18 16:17:58,581 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 16:17:58,584 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-18 16:17:58,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-18 16:17:58,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-18 16:17:58,598 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2018-11-18 16:17:58,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 16:17:58,713 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2018-11-18 16:17:58,713 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-18 16:17:58,714 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2018-11-18 16:17:58,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 16:17:58,722 INFO L225 Difference]: With dead ends: 30 [2018-11-18 16:17:58,723 INFO L226 Difference]: Without dead ends: 18 [2018-11-18 16:17:58,725 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-11-18 16:17:58,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-11-18 16:17:58,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-11-18 16:17:58,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-11-18 16:17:58,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2018-11-18 16:17:58,762 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2018-11-18 16:17:58,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 16:17:58,762 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2018-11-18 16:17:58,763 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-18 16:17:58,763 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2018-11-18 16:17:58,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-11-18 16:17:58,766 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 16:17:58,766 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 16:17:58,767 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 16:17:58,767 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 16:17:58,767 INFO L82 PathProgramCache]: Analyzing trace with hash -118151420, now seen corresponding path program 1 times [2018-11-18 16:17:58,767 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 16:17:58,768 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 16:17:58,768 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 16:17:58,768 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 16:17:58,769 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 16:17:58,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 16:17:58,869 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 16:17:58,869 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 16:17:58,869 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 16:17:58,870 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 20 with the following transitions: [2018-11-18 16:17:58,872 INFO L202 CegarAbsIntRunner]: [0], [4], [7], [8], [10], [11], [12], [14], [17], [19], [25], [26], [27], [29], [30], [31], [32] [2018-11-18 16:17:58,900 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-18 16:17:58,900 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-18 16:17:59,017 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-18 16:17:59,018 INFO L272 AbstractInterpreter]: Visited 16 different actions 27 times. Never merged. Never widened. Performed 64 root evaluator evaluations with a maximum evaluation depth of 4. Performed 64 inverse root evaluator evaluations with a maximum inverse evaluation depth of 4. Never found a fixpoint. Largest state had 6 variables. [2018-11-18 16:17:59,022 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 16:17:59,023 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-18 16:17:59,067 INFO L227 lantSequenceWeakener]: Weakened 8 states. On average, predicates are now at 68.75% of their original sizes. [2018-11-18 16:17:59,067 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-18 16:17:59,284 INFO L415 sIntCurrentIteration]: We unified 18 AI predicates to 18 [2018-11-18 16:17:59,284 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-18 16:17:59,285 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-18 16:17:59,285 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [6] total 15 [2018-11-18 16:17:59,285 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 16:17:59,286 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-18 16:17:59,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-18 16:17:59,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2018-11-18 16:17:59,287 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 11 states. [2018-11-18 16:17:59,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 16:17:59,657 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2018-11-18 16:17:59,657 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-18 16:17:59,658 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-11-18 16:17:59,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 16:17:59,659 INFO L225 Difference]: With dead ends: 39 [2018-11-18 16:17:59,659 INFO L226 Difference]: Without dead ends: 30 [2018-11-18 16:17:59,660 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2018-11-18 16:17:59,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-11-18 16:17:59,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2018-11-18 16:17:59,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-11-18 16:17:59,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2018-11-18 16:17:59,666 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 19 [2018-11-18 16:17:59,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 16:17:59,666 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2018-11-18 16:17:59,666 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-18 16:17:59,666 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2018-11-18 16:17:59,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-11-18 16:17:59,669 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 16:17:59,670 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 16:17:59,672 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 16:17:59,672 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 16:17:59,672 INFO L82 PathProgramCache]: Analyzing trace with hash 764931548, now seen corresponding path program 2 times [2018-11-18 16:17:59,672 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 16:17:59,673 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 16:17:59,674 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 16:17:59,674 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 16:17:59,674 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 16:17:59,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 16:18:00,141 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-11-18 16:18:00,142 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 16:18:00,142 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 16:18:00,142 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-18 16:18:00,143 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-18 16:18:00,143 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 16:18:00,143 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_77de7bc3-9141-4b58-83ad-228df445b117/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 16:18:00,162 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-18 16:18:00,162 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-11-18 16:18:00,196 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-11-18 16:18:00,196 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 16:18:00,203 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 16:18:00,554 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-11-18 16:18:00,560 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 16:18:00,749 WARN L180 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-11-18 16:18:01,016 WARN L180 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2018-11-18 16:18:02,184 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-11-18 16:18:02,216 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-18 16:18:02,216 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2018-11-18 16:18:02,216 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 16:18:02,217 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-11-18 16:18:02,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-11-18 16:18:02,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2018-11-18 16:18:02,218 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand 17 states. [2018-11-18 16:18:02,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 16:18:02,613 INFO L93 Difference]: Finished difference Result 49 states and 52 transitions. [2018-11-18 16:18:02,613 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-18 16:18:02,613 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 25 [2018-11-18 16:18:02,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 16:18:02,614 INFO L225 Difference]: With dead ends: 49 [2018-11-18 16:18:02,614 INFO L226 Difference]: Without dead ends: 39 [2018-11-18 16:18:02,615 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 35 SyntacticMatches, 10 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=114, Invalid=536, Unknown=0, NotChecked=0, Total=650 [2018-11-18 16:18:02,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-11-18 16:18:02,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 30. [2018-11-18 16:18:02,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-11-18 16:18:02,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2018-11-18 16:18:02,620 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 25 [2018-11-18 16:18:02,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 16:18:02,621 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2018-11-18 16:18:02,621 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-11-18 16:18:02,621 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2018-11-18 16:18:02,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-11-18 16:18:02,621 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 16:18:02,622 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 16:18:02,622 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 16:18:02,622 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 16:18:02,622 INFO L82 PathProgramCache]: Analyzing trace with hash 601942852, now seen corresponding path program 3 times [2018-11-18 16:18:02,622 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 16:18:02,623 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 16:18:02,623 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 16:18:02,623 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 16:18:02,623 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 16:18:02,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 16:18:02,678 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-11-18 16:18:02,678 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 16:18:02,679 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 16:18:02,679 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-18 16:18:02,679 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-18 16:18:02,679 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 16:18:02,679 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_77de7bc3-9141-4b58-83ad-228df445b117/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 16:18:02,695 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-18 16:18:02,696 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-11-18 16:18:02,705 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-18 16:18:02,706 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 16:18:02,708 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 16:18:02,722 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-11-18 16:18:02,722 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 16:18:03,032 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-11-18 16:18:03,050 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-18 16:18:03,050 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 9] total 10 [2018-11-18 16:18:03,050 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 16:18:03,051 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-18 16:18:03,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-18 16:18:03,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2018-11-18 16:18:03,051 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 7 states. [2018-11-18 16:18:03,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 16:18:03,128 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2018-11-18 16:18:03,129 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-18 16:18:03,129 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 31 [2018-11-18 16:18:03,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 16:18:03,129 INFO L225 Difference]: With dead ends: 39 [2018-11-18 16:18:03,129 INFO L226 Difference]: Without dead ends: 0 [2018-11-18 16:18:03,130 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 58 SyntacticMatches, 7 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2018-11-18 16:18:03,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-11-18 16:18:03,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-11-18 16:18:03,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-11-18 16:18:03,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-11-18 16:18:03,130 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 31 [2018-11-18 16:18:03,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 16:18:03,131 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-18 16:18:03,131 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-18 16:18:03,131 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-11-18 16:18:03,131 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-11-18 16:18:03,135 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-11-18 16:18:03,249 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-11-18 16:18:03,249 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-11-18 16:18:03,249 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-11-18 16:18:03,249 INFO L428 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-11-18 16:18:03,249 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-11-18 16:18:03,249 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-11-18 16:18:03,250 INFO L425 ceAbstractionStarter]: For program point sumEXIT(lines 3 9) no Hoare annotation was computed. [2018-11-18 16:18:03,250 INFO L421 ceAbstractionStarter]: At program point L7(line 7) the Hoare annotation is: (and (<= |sum_#in~m| sum_~m) (<= sum_~m |sum_#in~m|) (<= sum_~n |sum_#in~n|) (< 0 sum_~n) (<= |sum_#in~n| sum_~n)) [2018-11-18 16:18:03,250 INFO L425 ceAbstractionStarter]: For program point L7-1(line 7) no Hoare annotation was computed. [2018-11-18 16:18:03,250 INFO L425 ceAbstractionStarter]: For program point L4(lines 4 8) no Hoare annotation was computed. [2018-11-18 16:18:03,250 INFO L425 ceAbstractionStarter]: For program point sumFINAL(lines 3 9) no Hoare annotation was computed. [2018-11-18 16:18:03,250 INFO L428 ceAbstractionStarter]: At program point sumENTRY(lines 3 9) the Hoare annotation is: true [2018-11-18 16:18:03,250 INFO L428 ceAbstractionStarter]: At program point mainENTRY(lines 11 18) the Hoare annotation is: true [2018-11-18 16:18:03,250 INFO L425 ceAbstractionStarter]: For program point mainEXIT(lines 11 18) no Hoare annotation was computed. [2018-11-18 16:18:03,250 INFO L425 ceAbstractionStarter]: For program point L16(line 16) no Hoare annotation was computed. [2018-11-18 16:18:03,250 INFO L425 ceAbstractionStarter]: For program point L15(lines 15 17) no Hoare annotation was computed. [2018-11-18 16:18:03,250 INFO L421 ceAbstractionStarter]: At program point L14(line 14) the Hoare annotation is: (and (= main_~b~0 3) (<= 2 main_~a~0) (<= main_~a~0 2)) [2018-11-18 16:18:03,251 INFO L425 ceAbstractionStarter]: For program point L14-1(line 14) no Hoare annotation was computed. [2018-11-18 16:18:03,251 INFO L425 ceAbstractionStarter]: For program point L15-2(lines 11 18) no Hoare annotation was computed. [2018-11-18 16:18:03,251 INFO L425 ceAbstractionStarter]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 16) no Hoare annotation was computed. [2018-11-18 16:18:03,253 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.11 04:18:03 BoogieIcfgContainer [2018-11-18 16:18:03,253 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-18 16:18:03,253 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-18 16:18:03,253 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-18 16:18:03,254 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-18 16:18:03,254 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 04:17:58" (3/4) ... [2018-11-18 16:18:03,257 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-11-18 16:18:03,261 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-11-18 16:18:03,261 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure sum [2018-11-18 16:18:03,262 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-11-18 16:18:03,265 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2018-11-18 16:18:03,265 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2018-11-18 16:18:03,265 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-11-18 16:18:03,294 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_77de7bc3-9141-4b58-83ad-228df445b117/bin-2019/utaipan/witness.graphml [2018-11-18 16:18:03,294 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-18 16:18:03,294 INFO L168 Benchmark]: Toolchain (without parser) took 5450.52 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 209.2 MB). Free memory was 961.9 MB in the beginning and 1.2 GB in the end (delta: -232.6 MB). There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 16:18:03,295 INFO L168 Benchmark]: CDTParser took 0.20 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 16:18:03,295 INFO L168 Benchmark]: CACSL2BoogieTranslator took 207.57 ms. Allocated memory is still 1.0 GB. Free memory was 961.9 MB in the beginning and 951.2 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-11-18 16:18:03,296 INFO L168 Benchmark]: Boogie Procedure Inliner took 20.91 ms. Allocated memory is still 1.0 GB. Free memory is still 951.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 16:18:03,296 INFO L168 Benchmark]: Boogie Preprocessor took 18.98 ms. Allocated memory is still 1.0 GB. Free memory was 951.2 MB in the beginning and 945.8 MB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. [2018-11-18 16:18:03,296 INFO L168 Benchmark]: RCFGBuilder took 204.82 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 131.6 MB). Free memory was 945.8 MB in the beginning and 1.1 GB in the end (delta: -174.0 MB). Peak memory consumption was 19.9 MB. Max. memory is 11.5 GB. [2018-11-18 16:18:03,297 INFO L168 Benchmark]: TraceAbstraction took 4954.04 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 77.6 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -74.8 MB). Peak memory consumption was 350.3 MB. Max. memory is 11.5 GB. [2018-11-18 16:18:03,297 INFO L168 Benchmark]: Witness Printer took 40.50 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 16:18:03,302 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 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 207.57 ms. Allocated memory is still 1.0 GB. Free memory was 961.9 MB in the beginning and 951.2 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 20.91 ms. Allocated memory is still 1.0 GB. Free memory is still 951.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 18.98 ms. Allocated memory is still 1.0 GB. Free memory was 951.2 MB in the beginning and 945.8 MB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. * RCFGBuilder took 204.82 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 131.6 MB). Free memory was 945.8 MB in the beginning and 1.1 GB in the end (delta: -174.0 MB). Peak memory consumption was 19.9 MB. Max. memory is 11.5 GB. * TraceAbstraction took 4954.04 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 77.6 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -74.8 MB). Peak memory consumption was 350.3 MB. Max. memory is 11.5 GB. * Witness Printer took 40.50 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 16]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. SAFE Result, 4.9s OverallTime, 4 OverallIterations, 4 TraceHistogramMax, 0.9s AutomataDifference, 0.0s DeadEndRemovalTime, 0.1s HoareAnnotationTime, HoareTripleCheckerStatistics: 60 SDtfs, 60 SDslu, 240 SDs, 0 SdLazy, 180 SolverSat, 38 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 2 DeclaredPredicates, 171 GetRequests, 104 SyntacticMatches, 17 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 1.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=30occurred in iteration=3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.1s AbstIntTime, 1 AbstIntIterations, 1 AbstIntStrong, 0.7398148148148148 AbsIntWeakeningRatio, 0.8333333333333334 AbsIntAvgWeakeningVarsNumRemoved, 1.4444444444444444 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 11 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 13 PreInvPairs, 13 NumberOfFragments, 31 HoareAnnotationTreeSize, 13 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 86 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 3.0s InterpolantComputationTime, 144 NumberOfCodeBlocks, 140 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 192 ConstructedInterpolants, 0 QuantifiedInterpolants, 20268 SizeOfPredicates, 14 NumberOfNonLiveVariables, 146 ConjunctsInSsa, 41 ConjunctsInUnsatCore, 8 InterpolantComputations, 1 PerfectInterpolantSequences, 88/136 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...