./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/afterrec-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f470102c Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_23581236-e096-4e9d-aa0a-e3b3566a7e79/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_23581236-e096-4e9d-aa0a-e3b3566a7e79/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_23581236-e096-4e9d-aa0a-e3b3566a7e79/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_23581236-e096-4e9d-aa0a-e3b3566a7e79/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursive-simple/afterrec-2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_23581236-e096-4e9d-aa0a-e3b3566a7e79/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_23581236-e096-4e9d-aa0a-e3b3566a7e79/bin/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 30601811463d073f869bef96a3132d41c5e6f5ce .................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.25-f470102 [2019-12-07 22:07:15,501 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-07 22:07:15,502 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-07 22:07:15,510 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-07 22:07:15,510 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-07 22:07:15,511 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-07 22:07:15,512 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-07 22:07:15,513 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-07 22:07:15,514 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-07 22:07:15,515 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-07 22:07:15,516 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-07 22:07:15,516 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-07 22:07:15,517 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-07 22:07:15,517 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-07 22:07:15,518 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-07 22:07:15,519 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-07 22:07:15,519 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-07 22:07:15,520 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-07 22:07:15,521 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-07 22:07:15,523 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-07 22:07:15,524 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-07 22:07:15,525 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-07 22:07:15,526 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-07 22:07:15,526 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-07 22:07:15,528 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-12-07 22:07:15,528 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-12-07 22:07:15,528 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-12-07 22:07:15,529 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-12-07 22:07:15,529 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-12-07 22:07:15,530 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-12-07 22:07:15,530 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-07 22:07:15,530 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-07 22:07:15,531 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-07 22:07:15,531 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-07 22:07:15,532 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-07 22:07:15,532 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-07 22:07:15,532 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-07 22:07:15,532 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-07 22:07:15,533 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-07 22:07:15,533 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-07 22:07:15,534 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-07 22:07:15,534 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_23581236-e096-4e9d-aa0a-e3b3566a7e79/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2019-12-07 22:07:15,545 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-07 22:07:15,545 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-07 22:07:15,545 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-12-07 22:07:15,545 INFO L138 SettingsManager]: * User list type=DISABLED [2019-12-07 22:07:15,546 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-12-07 22:07:15,546 INFO L138 SettingsManager]: * Explicit value domain=true [2019-12-07 22:07:15,546 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-12-07 22:07:15,546 INFO L138 SettingsManager]: * Octagon Domain=false [2019-12-07 22:07:15,546 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-12-07 22:07:15,546 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-12-07 22:07:15,546 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-12-07 22:07:15,547 INFO L138 SettingsManager]: * Interval Domain=false [2019-12-07 22:07:15,547 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-12-07 22:07:15,547 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-12-07 22:07:15,547 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-12-07 22:07:15,548 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-07 22:07:15,548 INFO L138 SettingsManager]: * sizeof long=4 [2019-12-07 22:07:15,548 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-12-07 22:07:15,548 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-12-07 22:07:15,548 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-07 22:07:15,548 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-12-07 22:07:15,548 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-12-07 22:07:15,548 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-12-07 22:07:15,549 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-12-07 22:07:15,549 INFO L138 SettingsManager]: * sizeof long double=12 [2019-12-07 22:07:15,549 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-12-07 22:07:15,549 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-07 22:07:15,549 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-12-07 22:07:15,549 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-07 22:07:15,549 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-12-07 22:07:15,549 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-12-07 22:07:15,549 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-07 22:07:15,550 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-07 22:07:15,550 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-12-07 22:07:15,550 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-12-07 22:07:15,550 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-12-07 22:07:15,550 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-12-07 22:07:15,550 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-12-07 22:07:15,550 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-12-07 22:07:15,550 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-12-07 22:07:15,551 INFO L138 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/run_dir_23581236-e096-4e9d-aa0a-e3b3566a7e79/bin/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 -> 30601811463d073f869bef96a3132d41c5e6f5ce [2019-12-07 22:07:15,653 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-07 22:07:15,663 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-07 22:07:15,666 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-07 22:07:15,667 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-07 22:07:15,668 INFO L275 PluginConnector]: CDTParser initialized [2019-12-07 22:07:15,668 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_23581236-e096-4e9d-aa0a-e3b3566a7e79/bin/utaipan/../../sv-benchmarks/c/recursive-simple/afterrec-2.c [2019-12-07 22:07:15,714 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_23581236-e096-4e9d-aa0a-e3b3566a7e79/bin/utaipan/data/61caa0dac/a1aef81e4b7244eaaa3f45a89f8c7511/FLAG88089e71d [2019-12-07 22:07:16,162 INFO L306 CDTParser]: Found 1 translation units. [2019-12-07 22:07:16,163 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_23581236-e096-4e9d-aa0a-e3b3566a7e79/sv-benchmarks/c/recursive-simple/afterrec-2.c [2019-12-07 22:07:16,166 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_23581236-e096-4e9d-aa0a-e3b3566a7e79/bin/utaipan/data/61caa0dac/a1aef81e4b7244eaaa3f45a89f8c7511/FLAG88089e71d [2019-12-07 22:07:16,175 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_23581236-e096-4e9d-aa0a-e3b3566a7e79/bin/utaipan/data/61caa0dac/a1aef81e4b7244eaaa3f45a89f8c7511 [2019-12-07 22:07:16,177 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-07 22:07:16,178 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-12-07 22:07:16,178 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-07 22:07:16,178 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-07 22:07:16,180 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-07 22:07:16,181 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 10:07:16" (1/1) ... [2019-12-07 22:07:16,183 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@151e0143 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 10:07:16, skipping insertion in model container [2019-12-07 22:07:16,183 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 10:07:16" (1/1) ... [2019-12-07 22:07:16,187 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-07 22:07:16,197 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-07 22:07:16,288 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 22:07:16,290 INFO L203 MainTranslator]: Completed pre-run [2019-12-07 22:07:16,332 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 22:07:16,342 INFO L208 MainTranslator]: Completed translation [2019-12-07 22:07:16,342 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 10:07:16 WrapperNode [2019-12-07 22:07:16,342 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-07 22:07:16,343 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-07 22:07:16,343 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-07 22:07:16,343 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-07 22:07:16,348 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 10:07:16" (1/1) ... [2019-12-07 22:07:16,351 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 10:07:16" (1/1) ... [2019-12-07 22:07:16,362 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-07 22:07:16,362 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-07 22:07:16,363 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-07 22:07:16,363 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-07 22:07:16,368 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 10:07:16" (1/1) ... [2019-12-07 22:07:16,369 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 10:07:16" (1/1) ... [2019-12-07 22:07:16,369 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 10:07:16" (1/1) ... [2019-12-07 22:07:16,369 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 10:07:16" (1/1) ... [2019-12-07 22:07:16,370 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 10:07:16" (1/1) ... [2019-12-07 22:07:16,371 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 10:07:16" (1/1) ... [2019-12-07 22:07:16,372 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 10:07:16" (1/1) ... [2019-12-07 22:07:16,372 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-07 22:07:16,372 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-07 22:07:16,373 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-07 22:07:16,373 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-07 22:07:16,373 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 10:07:16" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_23581236-e096-4e9d-aa0a-e3b3566a7e79/bin/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 [2019-12-07 22:07:16,412 INFO L130 BoogieDeclarations]: Found specification of procedure f [2019-12-07 22:07:16,412 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2019-12-07 22:07:16,412 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-07 22:07:16,412 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-07 22:07:16,497 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-07 22:07:16,498 INFO L287 CfgBuilder]: Removed 4 assume(true) statements. [2019-12-07 22:07:16,498 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 10:07:16 BoogieIcfgContainer [2019-12-07 22:07:16,498 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-07 22:07:16,499 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-12-07 22:07:16,499 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-12-07 22:07:16,501 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-12-07 22:07:16,501 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 10:07:16" (1/3) ... [2019-12-07 22:07:16,501 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@275b999c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 10:07:16, skipping insertion in model container [2019-12-07 22:07:16,502 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 10:07:16" (2/3) ... [2019-12-07 22:07:16,502 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@275b999c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 10:07:16, skipping insertion in model container [2019-12-07 22:07:16,502 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 10:07:16" (3/3) ... [2019-12-07 22:07:16,503 INFO L109 eAbstractionObserver]: Analyzing ICFG afterrec-2.c [2019-12-07 22:07:16,509 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-12-07 22:07:16,513 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-12-07 22:07:16,520 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-12-07 22:07:16,534 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-12-07 22:07:16,534 INFO L374 AbstractCegarLoop]: Hoare is true [2019-12-07 22:07:16,534 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-12-07 22:07:16,534 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-12-07 22:07:16,534 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-07 22:07:16,535 INFO L378 AbstractCegarLoop]: Difference is false [2019-12-07 22:07:16,535 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-07 22:07:16,535 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-12-07 22:07:16,545 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states. [2019-12-07 22:07:16,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-07 22:07:16,548 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 22:07:16,548 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 22:07:16,549 INFO L410 AbstractCegarLoop]: === Iteration 1 === [fErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 22:07:16,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 22:07:16,552 INFO L82 PathProgramCache]: Analyzing trace with hash 1875137816, now seen corresponding path program 1 times [2019-12-07 22:07:16,558 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 22:07:16,558 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718099975] [2019-12-07 22:07:16,558 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 22:07:16,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 22:07:16,647 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 22:07:16,648 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718099975] [2019-12-07 22:07:16,648 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120105471] [2019-12-07 22:07:16,648 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_23581236-e096-4e9d-aa0a-e3b3566a7e79/bin/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 22:07:16,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 22:07:16,672 INFO L264 TraceCheckSpWp]: Trace formula consists of 22 conjuncts, 3 conjunts are in the unsatisfiable core [2019-12-07 22:07:16,675 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 22:07:16,691 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 22:07:16,691 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 22:07:16,706 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 22:07:16,707 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-12-07 22:07:16,707 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 4 [2019-12-07 22:07:16,708 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267740120] [2019-12-07 22:07:16,711 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-07 22:07:16,712 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 22:07:16,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-07 22:07:16,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-12-07 22:07:16,722 INFO L87 Difference]: Start difference. First operand 11 states. Second operand 4 states. [2019-12-07 22:07:16,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 22:07:16,749 INFO L93 Difference]: Finished difference Result 17 states and 18 transitions. [2019-12-07 22:07:16,750 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-07 22:07:16,750 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2019-12-07 22:07:16,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 22:07:16,754 INFO L225 Difference]: With dead ends: 17 [2019-12-07 22:07:16,754 INFO L226 Difference]: Without dead ends: 0 [2019-12-07 22:07:16,756 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-12-07 22:07:16,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-12-07 22:07:16,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-12-07 22:07:16,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-12-07 22:07:16,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-12-07 22:07:16,774 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 10 [2019-12-07 22:07:16,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 22:07:16,774 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-12-07 22:07:16,774 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-07 22:07:16,774 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-12-07 22:07:16,774 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-12-07 22:07:16,975 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 22:07:16,980 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-12-07 22:07:17,020 INFO L246 CegarLoopResult]: For program point fErr0ASSERT_VIOLATIONERROR_FUNCTION(line 7) no Hoare annotation was computed. [2019-12-07 22:07:17,021 INFO L246 CegarLoopResult]: For program point fEXIT(lines 3 8) no Hoare annotation was computed. [2019-12-07 22:07:17,021 INFO L242 CegarLoopResult]: At program point L6(line 6) the Hoare annotation is: (not (<= |f_#in~n| 2)) [2019-12-07 22:07:17,021 INFO L249 CegarLoopResult]: At program point fENTRY(lines 3 8) the Hoare annotation is: true [2019-12-07 22:07:17,022 INFO L246 CegarLoopResult]: For program point L6-1(lines 3 8) no Hoare annotation was computed. [2019-12-07 22:07:17,022 INFO L246 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2019-12-07 22:07:17,022 INFO L246 CegarLoopResult]: For program point fFINAL(lines 3 8) no Hoare annotation was computed. [2019-12-07 22:07:17,022 INFO L246 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-12-07 22:07:17,022 INFO L246 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2019-12-07 22:07:17,023 INFO L249 CegarLoopResult]: At program point L11(line 11) the Hoare annotation is: true [2019-12-07 22:07:17,023 INFO L246 CegarLoopResult]: For program point L11-1(lines 10 12) no Hoare annotation was computed. [2019-12-07 22:07:17,030 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.12 10:07:17 BoogieIcfgContainer [2019-12-07 22:07:17,030 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-12-07 22:07:17,030 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-12-07 22:07:17,030 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-12-07 22:07:17,031 INFO L275 PluginConnector]: Witness Printer initialized [2019-12-07 22:07:17,031 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 10:07:16" (3/4) ... [2019-12-07 22:07:17,035 INFO L137 WitnessPrinter]: Generating witness for correct program [2019-12-07 22:07:17,040 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure f [2019-12-07 22:07:17,042 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2019-12-07 22:07:17,042 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2019-12-07 22:07:17,067 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_23581236-e096-4e9d-aa0a-e3b3566a7e79/bin/utaipan/witness.graphml [2019-12-07 22:07:17,067 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-12-07 22:07:17,068 INFO L168 Benchmark]: Toolchain (without parser) took 890.25 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 94.9 MB). Free memory was 944.7 MB in the beginning and 1.0 GB in the end (delta: -88.6 MB). Peak memory consumption was 6.3 MB. Max. memory is 11.5 GB. [2019-12-07 22:07:17,068 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 1.0 GB. Free memory is still 960.8 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 22:07:17,069 INFO L168 Benchmark]: CACSL2BoogieTranslator took 164.26 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 94.9 MB). Free memory was 944.7 MB in the beginning and 1.1 GB in the end (delta: -145.0 MB). Peak memory consumption was 23.1 MB. Max. memory is 11.5 GB. [2019-12-07 22:07:17,069 INFO L168 Benchmark]: Boogie Procedure Inliner took 19.69 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 22:07:17,069 INFO L168 Benchmark]: Boogie Preprocessor took 9.87 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 22:07:17,070 INFO L168 Benchmark]: RCFGBuilder took 126.00 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 17.0 MB). Peak memory consumption was 17.0 MB. Max. memory is 11.5 GB. [2019-12-07 22:07:17,070 INFO L168 Benchmark]: TraceAbstraction took 530.98 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 39.4 MB). Peak memory consumption was 39.4 MB. Max. memory is 11.5 GB. [2019-12-07 22:07:17,070 INFO L168 Benchmark]: Witness Printer took 36.45 ms. Allocated memory is still 1.1 GB. Free memory is still 1.0 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 22:07:17,073 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 1.0 GB. Free memory is still 960.8 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 164.26 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 94.9 MB). Free memory was 944.7 MB in the beginning and 1.1 GB in the end (delta: -145.0 MB). Peak memory consumption was 23.1 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 19.69 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 9.87 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 126.00 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 17.0 MB). Peak memory consumption was 17.0 MB. Max. memory is 11.5 GB. * TraceAbstraction took 530.98 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 39.4 MB). Peak memory consumption was 39.4 MB. Max. memory is 11.5 GB. * Witness Printer took 36.45 ms. Allocated memory is still 1.1 GB. Free memory is still 1.0 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 7]: 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 2 procedures, 11 locations, 1 error locations. Result: SAFE, OverallTime: 0.4s, OverallIterations: 1, TraceHistogramMax: 2, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 4 SDtfs, 5 SDslu, 5 SDs, 0 SdLazy, 5 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 23 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=11occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 5 PreInvPairs, 5 NumberOfFragments, 6 HoareAnnotationTreeSize, 5 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 3 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 20 NumberOfCodeBlocks, 20 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 27 ConstructedInterpolants, 0 QuantifiedInterpolants, 351 SizeOfPredicates, 1 NumberOfNonLiveVariables, 22 ConjunctsInSsa, 3 ConjunctsInUnsatCore, 3 InterpolantComputations, 1 PerfectInterpolantSequences, 2/6 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...