./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive/Ackermann02.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cad46833 Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_edafef40-03ba-4367-9b68-5558aca1f0d3/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_edafef40-03ba-4367-9b68-5558aca1f0d3/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_edafef40-03ba-4367-9b68-5558aca1f0d3/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_edafef40-03ba-4367-9b68-5558aca1f0d3/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursive/Ackermann02.c -s /tmp/vcloud-vcloud-master/worker/working_dir_edafef40-03ba-4367-9b68-5558aca1f0d3/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_edafef40-03ba-4367-9b68-5558aca1f0d3/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 dd82318ec795f8c5ba1d6bd1e94de4995b910941 ........................................................................................................................................................................................................................................................................................................................... Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_edafef40-03ba-4367-9b68-5558aca1f0d3/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_edafef40-03ba-4367-9b68-5558aca1f0d3/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_edafef40-03ba-4367-9b68-5558aca1f0d3/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_edafef40-03ba-4367-9b68-5558aca1f0d3/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursive/Ackermann02.c -s /tmp/vcloud-vcloud-master/worker/working_dir_edafef40-03ba-4367-9b68-5558aca1f0d3/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_edafef40-03ba-4367-9b68-5558aca1f0d3/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 dd82318ec795f8c5ba1d6bd1e94de4995b910941 .................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.1.24-cad4683 [2019-10-22 11:22:26,378 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-22 11:22:26,379 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-22 11:22:26,388 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-22 11:22:26,388 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-22 11:22:26,389 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-22 11:22:26,390 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-22 11:22:26,391 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-22 11:22:26,393 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-22 11:22:26,393 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-22 11:22:26,394 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-22 11:22:26,395 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-22 11:22:26,395 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-22 11:22:26,396 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-22 11:22:26,397 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-22 11:22:26,397 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-22 11:22:26,398 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-22 11:22:26,398 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-22 11:22:26,400 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-22 11:22:26,401 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-22 11:22:26,402 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-22 11:22:26,411 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-22 11:22:26,412 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-22 11:22:26,413 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-22 11:22:26,414 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-22 11:22:26,415 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-22 11:22:26,415 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-22 11:22:26,415 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-22 11:22:26,416 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-22 11:22:26,416 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-22 11:22:26,417 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-22 11:22:26,417 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-22 11:22:26,418 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-22 11:22:26,418 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-22 11:22:26,423 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-22 11:22:26,424 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-22 11:22:26,425 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-22 11:22:26,425 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-22 11:22:26,425 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-22 11:22:26,426 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-22 11:22:26,426 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-22 11:22:26,427 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_edafef40-03ba-4367-9b68-5558aca1f0d3/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2019-10-22 11:22:26,446 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-22 11:22:26,448 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-22 11:22:26,449 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-10-22 11:22:26,449 INFO L138 SettingsManager]: * User list type=DISABLED [2019-10-22 11:22:26,449 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-10-22 11:22:26,449 INFO L138 SettingsManager]: * Explicit value domain=true [2019-10-22 11:22:26,450 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-10-22 11:22:26,450 INFO L138 SettingsManager]: * Octagon Domain=false [2019-10-22 11:22:26,450 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-10-22 11:22:26,450 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-10-22 11:22:26,450 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-10-22 11:22:26,450 INFO L138 SettingsManager]: * Interval Domain=false [2019-10-22 11:22:26,451 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-22 11:22:26,451 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-22 11:22:26,451 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-22 11:22:26,451 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-22 11:22:26,452 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-22 11:22:26,452 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-22 11:22:26,452 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-22 11:22:26,452 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-22 11:22:26,452 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-22 11:22:26,452 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-22 11:22:26,452 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-22 11:22:26,453 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-22 11:22:26,453 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-22 11:22:26,453 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-22 11:22:26,453 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-22 11:22:26,453 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-22 11:22:26,453 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-22 11:22:26,454 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-22 11:22:26,454 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-22 11:22:26,454 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-10-22 11:22:26,454 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-22 11:22:26,454 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-22 11:22:26,454 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-22 11:22:26,454 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/working_dir_edafef40-03ba-4367-9b68-5558aca1f0d3/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 -> dd82318ec795f8c5ba1d6bd1e94de4995b910941 [2019-10-22 11:22:26,491 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-22 11:22:26,501 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-22 11:22:26,504 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-22 11:22:26,505 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-22 11:22:26,505 INFO L275 PluginConnector]: CDTParser initialized [2019-10-22 11:22:26,506 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_edafef40-03ba-4367-9b68-5558aca1f0d3/bin/utaipan/../../sv-benchmarks/c/recursive/Ackermann02.c [2019-10-22 11:22:26,556 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_edafef40-03ba-4367-9b68-5558aca1f0d3/bin/utaipan/data/cd1107752/25a386ea043d4aeda59ced2586b877e2/FLAG4f315b702 [2019-10-22 11:22:26,926 INFO L306 CDTParser]: Found 1 translation units. [2019-10-22 11:22:26,926 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_edafef40-03ba-4367-9b68-5558aca1f0d3/sv-benchmarks/c/recursive/Ackermann02.c [2019-10-22 11:22:26,931 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_edafef40-03ba-4367-9b68-5558aca1f0d3/bin/utaipan/data/cd1107752/25a386ea043d4aeda59ced2586b877e2/FLAG4f315b702 [2019-10-22 11:22:27,341 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_edafef40-03ba-4367-9b68-5558aca1f0d3/bin/utaipan/data/cd1107752/25a386ea043d4aeda59ced2586b877e2 [2019-10-22 11:22:27,344 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-22 11:22:27,345 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-10-22 11:22:27,346 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-22 11:22:27,346 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-22 11:22:27,349 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-22 11:22:27,349 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 11:22:27" (1/1) ... [2019-10-22 11:22:27,351 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@201d2f64 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:22:27, skipping insertion in model container [2019-10-22 11:22:27,351 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 11:22:27" (1/1) ... [2019-10-22 11:22:27,355 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-22 11:22:27,366 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-22 11:22:27,484 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 11:22:27,487 INFO L188 MainTranslator]: Completed pre-run [2019-10-22 11:22:27,555 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 11:22:27,567 INFO L192 MainTranslator]: Completed translation [2019-10-22 11:22:27,567 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:22:27 WrapperNode [2019-10-22 11:22:27,568 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-22 11:22:27,568 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-10-22 11:22:27,568 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-10-22 11:22:27,568 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-10-22 11:22:27,574 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:22:27" (1/1) ... [2019-10-22 11:22:27,578 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:22:27" (1/1) ... [2019-10-22 11:22:27,590 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-10-22 11:22:27,590 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-22 11:22:27,590 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-22 11:22:27,590 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-22 11:22:27,598 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:22:27" (1/1) ... [2019-10-22 11:22:27,599 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:22:27" (1/1) ... [2019-10-22 11:22:27,599 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:22:27" (1/1) ... [2019-10-22 11:22:27,599 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:22:27" (1/1) ... [2019-10-22 11:22:27,601 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:22:27" (1/1) ... [2019-10-22 11:22:27,603 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:22:27" (1/1) ... [2019-10-22 11:22:27,604 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:22:27" (1/1) ... [2019-10-22 11:22:27,605 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-22 11:22:27,605 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-22 11:22:27,605 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-22 11:22:27,606 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-22 11:22:27,606 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:22:27" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_edafef40-03ba-4367-9b68-5558aca1f0d3/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 [2019-10-22 11:22:27,659 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-22 11:22:27,660 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-22 11:22:27,660 INFO L130 BoogieDeclarations]: Found specification of procedure ackermann [2019-10-22 11:22:27,660 INFO L138 BoogieDeclarations]: Found implementation of procedure ackermann [2019-10-22 11:22:27,799 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-22 11:22:27,800 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-10-22 11:22:27,801 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 11:22:27 BoogieIcfgContainer [2019-10-22 11:22:27,801 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-22 11:22:27,802 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-22 11:22:27,802 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-22 11:22:27,805 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-22 11:22:27,805 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.10 11:22:27" (1/3) ... [2019-10-22 11:22:27,806 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@639ee4a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 11:22:27, skipping insertion in model container [2019-10-22 11:22:27,806 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:22:27" (2/3) ... [2019-10-22 11:22:27,807 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@639ee4a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 11:22:27, skipping insertion in model container [2019-10-22 11:22:27,807 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 11:22:27" (3/3) ... [2019-10-22 11:22:27,808 INFO L109 eAbstractionObserver]: Analyzing ICFG Ackermann02.c [2019-10-22 11:22:27,816 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-22 11:22:27,821 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-22 11:22:27,828 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-22 11:22:27,847 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-22 11:22:27,847 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-22 11:22:27,847 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-22 11:22:27,847 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-22 11:22:27,847 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-22 11:22:27,848 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-22 11:22:27,848 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-22 11:22:27,848 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-22 11:22:27,861 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2019-10-22 11:22:27,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-10-22 11:22:27,864 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:22:27,865 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 11:22:27,866 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:22:27,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:22:27,870 INFO L82 PathProgramCache]: Analyzing trace with hash -1260755674, now seen corresponding path program 1 times [2019-10-22 11:22:27,875 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-22 11:22:27,875 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781692086] [2019-10-22 11:22:27,876 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:22:27,876 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:22:27,876 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 11:22:27,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:22:28,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:22:28,021 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781692086] [2019-10-22 11:22:28,022 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 11:22:28,022 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-22 11:22:28,022 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730589718] [2019-10-22 11:22:28,038 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-22 11:22:28,039 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-22 11:22:28,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-22 11:22:28,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-22 11:22:28,066 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 5 states. [2019-10-22 11:22:28,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:22:28,189 INFO L93 Difference]: Finished difference Result 50 states and 71 transitions. [2019-10-22 11:22:28,189 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-22 11:22:28,191 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2019-10-22 11:22:28,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:22:28,199 INFO L225 Difference]: With dead ends: 50 [2019-10-22 11:22:28,199 INFO L226 Difference]: Without dead ends: 24 [2019-10-22 11:22:28,202 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-22 11:22:28,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-10-22 11:22:28,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2019-10-22 11:22:28,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-10-22 11:22:28,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 31 transitions. [2019-10-22 11:22:28,240 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 31 transitions. Word has length 11 [2019-10-22 11:22:28,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:22:28,240 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 31 transitions. [2019-10-22 11:22:28,240 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-22 11:22:28,240 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 31 transitions. [2019-10-22 11:22:28,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-10-22 11:22:28,242 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:22:28,242 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 11:22:28,243 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:22:28,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:22:28,243 INFO L82 PathProgramCache]: Analyzing trace with hash 963920485, now seen corresponding path program 1 times [2019-10-22 11:22:28,243 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-22 11:22:28,244 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099326250] [2019-10-22 11:22:28,244 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:22:28,244 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:22:28,244 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 11:22:28,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:22:28,332 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-22 11:22:28,332 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099326250] [2019-10-22 11:22:28,333 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74175235] [2019-10-22 11:22:28,333 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_edafef40-03ba-4367-9b68-5558aca1f0d3/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 [2019-10-22 11:22:28,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:22:28,375 INFO L256 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-22 11:22:28,381 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:22:28,427 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-22 11:22:28,429 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:22:28,556 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:22:28,582 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-22 11:22:28,582 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [1346020996] [2019-10-22 11:22:28,589 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 19 [2019-10-22 11:22:28,619 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-10-22 11:22:28,619 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-22 11:22:28,880 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 11:22:28,881 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: inappropriate decl info IMPLEMENTATION at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.boogie.Boogie2SmtSymbolTable.getBoogieVar(Boogie2SmtSymbolTable.java:222) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.nonrelational.NonrelationalStatementProcessor.getBoogieVar(NonrelationalStatementProcessor.java:348) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.nonrelational.NonrelationalStatementProcessor.handleHavocStatement(NonrelationalStatementProcessor.java:325) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.nonrelational.NonrelationalStatementProcessor.processStatement(NonrelationalStatementProcessor.java:159) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.nonrelational.NonrelationalStatementProcessor.process(NonrelationalStatementProcessor.java:138) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.nonrelational.NonrelationalStatementProcessor.process(NonrelationalStatementProcessor.java:107) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.nonrelational.NonrelationalPostOperator.handleInternalTransition(NonrelationalPostOperator.java:422) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.nonrelational.NonrelationalPostOperator.handleInternalTransition(NonrelationalPostOperator.java:413) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.nonrelational.NonrelationalPostOperator.apply(NonrelationalPostOperator.java:140) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.nonrelational.NonrelationalPostOperator.apply(NonrelationalPostOperator.java:1) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.compound.CompoundDomainPostOperator.applyInternally(CompoundDomainPostOperator.java:306) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.compound.CompoundDomainPostOperator.apply(CompoundDomainPostOperator.java:131) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.compound.CompoundDomainPostOperator.apply(CompoundDomainPostOperator.java:1) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.transformula.poorman.PoormanCachedPostOperation.restoreOriginalStateVariables(PoormanCachedPostOperation.java:322) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.transformula.poorman.PoormansAbstractPostOperator.applyPost(PoormansAbstractPostOperator.java:217) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.transformula.poorman.PoormansAbstractPostOperator.apply(PoormansAbstractPostOperator.java:120) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.transformula.poorman.PoormansAbstractPostOperator.apply(PoormansAbstractPostOperator.java:1) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.absint.DisjunctiveAbstractState.lambda$17(DisjunctiveAbstractState.java:323) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.absint.DisjunctiveAbstractState.mapCollection(DisjunctiveAbstractState.java:519) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.absint.DisjunctiveAbstractState.apply(DisjunctiveAbstractState.java:323) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.algorithm.FixpointEngine.calculateAbstractPost(FixpointEngine.java:249) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.algorithm.FixpointEngine.calculateFixpoint(FixpointEngine.java:134) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.algorithm.FixpointEngine.run(FixpointEngine.java:105) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.tool.AbstractInterpreter.runWithoutTimeoutAndResults(AbstractInterpreter.java:149) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarAbsIntRunner.generateFixpoints(CegarAbsIntRunner.java:227) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarAbsIntRunner.(CegarAbsIntRunner.java:158) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleAbstractInterpretation.getOrConstructRunner(IpTcStrategyModuleAbstractInterpretation.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleAbstractInterpretation.construct(IpTcStrategyModuleAbstractInterpretation.java:81) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.tryExecuteInterpolantGenerator(TraceAbstractionRefinementEngine.java:299) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.generateProof(TraceAbstractionRefinementEngine.java:184) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.executeStrategy(TraceAbstractionRefinementEngine.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.RefinementEngineFactory.runRefinementEngine(RefinementEngineFactory.java:124) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:419) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:368) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterate(TraceAbstractionStarter.java:332) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:170) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:122) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:120) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2019-10-22 11:22:28,885 INFO L168 Benchmark]: Toolchain (without parser) took 1539.55 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 99.1 MB). Free memory was 943.2 MB in the beginning and 990.6 MB in the end (delta: -47.4 MB). Peak memory consumption was 51.7 MB. Max. memory is 11.5 GB. [2019-10-22 11:22:28,886 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 1.0 GB. Free memory is still 962.0 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 11:22:28,895 INFO L168 Benchmark]: CACSL2BoogieTranslator took 222.18 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 99.1 MB). Free memory was 943.2 MB in the beginning and 1.1 GB in the end (delta: -148.4 MB). Peak memory consumption was 23.0 MB. Max. memory is 11.5 GB. [2019-10-22 11:22:28,896 INFO L168 Benchmark]: Boogie Procedure Inliner took 21.80 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. [2019-10-22 11:22:28,896 INFO L168 Benchmark]: Boogie Preprocessor took 14.89 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. [2019-10-22 11:22:28,896 INFO L168 Benchmark]: RCFGBuilder took 195.91 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: 32.5 MB). Peak memory consumption was 32.5 MB. Max. memory is 11.5 GB. [2019-10-22 11:22:28,897 INFO L168 Benchmark]: TraceAbstraction took 1080.90 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 990.6 MB in the end (delta: 68.5 MB). Peak memory consumption was 68.5 MB. Max. memory is 11.5 GB. [2019-10-22 11:22:28,899 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 1.0 GB. Free memory is still 962.0 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 222.18 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 99.1 MB). Free memory was 943.2 MB in the beginning and 1.1 GB in the end (delta: -148.4 MB). Peak memory consumption was 23.0 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 21.80 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 14.89 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 195.91 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: 32.5 MB). Peak memory consumption was 32.5 MB. Max. memory is 11.5 GB. * TraceAbstraction took 1080.90 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 990.6 MB in the end (delta: 68.5 MB). Peak memory consumption was 68.5 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: inappropriate decl info IMPLEMENTATION de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: inappropriate decl info IMPLEMENTATION: de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.boogie.Boogie2SmtSymbolTable.getBoogieVar(Boogie2SmtSymbolTable.java:222) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... ### Bit-precise run ### This is Ultimate 0.1.24-cad4683 [2019-10-22 11:22:30,825 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-22 11:22:30,826 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-22 11:22:30,835 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-22 11:22:30,836 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-22 11:22:30,836 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-22 11:22:30,837 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-22 11:22:30,839 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-22 11:22:30,840 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-22 11:22:30,841 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-22 11:22:30,841 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-22 11:22:30,842 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-22 11:22:30,842 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-22 11:22:30,843 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-22 11:22:30,844 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-22 11:22:30,845 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-22 11:22:30,845 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-22 11:22:30,846 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-22 11:22:30,847 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-22 11:22:30,849 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-22 11:22:30,850 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-22 11:22:30,851 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-22 11:22:30,852 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-22 11:22:30,853 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-22 11:22:30,855 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-22 11:22:30,855 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-22 11:22:30,855 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-22 11:22:30,856 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-22 11:22:30,857 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-22 11:22:30,857 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-22 11:22:30,858 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-22 11:22:30,858 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-22 11:22:30,859 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-22 11:22:30,860 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-22 11:22:30,860 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-22 11:22:30,861 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-22 11:22:30,861 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-22 11:22:30,861 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-22 11:22:30,862 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-22 11:22:30,862 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-22 11:22:30,863 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-22 11:22:30,864 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_edafef40-03ba-4367-9b68-5558aca1f0d3/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2019-10-22 11:22:30,875 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-22 11:22:30,875 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-22 11:22:30,876 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-10-22 11:22:30,876 INFO L138 SettingsManager]: * User list type=DISABLED [2019-10-22 11:22:30,876 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-10-22 11:22:30,876 INFO L138 SettingsManager]: * Explicit value domain=true [2019-10-22 11:22:30,876 INFO L138 SettingsManager]: * Octagon Domain=false [2019-10-22 11:22:30,876 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-10-22 11:22:30,877 INFO L138 SettingsManager]: * Interval Domain=false [2019-10-22 11:22:30,877 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-22 11:22:30,877 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-22 11:22:30,877 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-22 11:22:30,878 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-22 11:22:30,878 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-22 11:22:30,878 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-22 11:22:30,878 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-22 11:22:30,878 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2019-10-22 11:22:30,878 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2019-10-22 11:22:30,878 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-22 11:22:30,879 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-22 11:22:30,879 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-22 11:22:30,879 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-22 11:22:30,879 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-22 11:22:30,879 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-22 11:22:30,879 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-22 11:22:30,880 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-22 11:22:30,880 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-22 11:22:30,880 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-22 11:22:30,880 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-22 11:22:30,880 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-22 11:22:30,880 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2019-10-22 11:22:30,880 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2019-10-22 11:22:30,881 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-22 11:22:30,881 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-22 11:22:30,881 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_edafef40-03ba-4367-9b68-5558aca1f0d3/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 -> dd82318ec795f8c5ba1d6bd1e94de4995b910941 [2019-10-22 11:22:30,914 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-22 11:22:30,923 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-22 11:22:30,926 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-22 11:22:30,927 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-22 11:22:30,928 INFO L275 PluginConnector]: CDTParser initialized [2019-10-22 11:22:30,928 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_edafef40-03ba-4367-9b68-5558aca1f0d3/bin/utaipan/../../sv-benchmarks/c/recursive/Ackermann02.c [2019-10-22 11:22:30,973 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_edafef40-03ba-4367-9b68-5558aca1f0d3/bin/utaipan/data/92fbf0936/bb33afdecda7405b87fe9d46f1290aa8/FLAGf4028198d [2019-10-22 11:22:31,358 INFO L306 CDTParser]: Found 1 translation units. [2019-10-22 11:22:31,359 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_edafef40-03ba-4367-9b68-5558aca1f0d3/sv-benchmarks/c/recursive/Ackermann02.c [2019-10-22 11:22:31,364 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_edafef40-03ba-4367-9b68-5558aca1f0d3/bin/utaipan/data/92fbf0936/bb33afdecda7405b87fe9d46f1290aa8/FLAGf4028198d [2019-10-22 11:22:31,767 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_edafef40-03ba-4367-9b68-5558aca1f0d3/bin/utaipan/data/92fbf0936/bb33afdecda7405b87fe9d46f1290aa8 [2019-10-22 11:22:31,770 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-22 11:22:31,772 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-10-22 11:22:31,773 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-22 11:22:31,773 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-22 11:22:31,779 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-22 11:22:31,780 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 11:22:31" (1/1) ... [2019-10-22 11:22:31,782 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a93105e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:22:31, skipping insertion in model container [2019-10-22 11:22:31,782 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 11:22:31" (1/1) ... [2019-10-22 11:22:31,791 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-22 11:22:31,805 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-22 11:22:31,956 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 11:22:31,961 INFO L188 MainTranslator]: Completed pre-run [2019-10-22 11:22:31,975 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 11:22:31,991 INFO L192 MainTranslator]: Completed translation [2019-10-22 11:22:31,991 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:22:31 WrapperNode [2019-10-22 11:22:31,992 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-22 11:22:31,992 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-10-22 11:22:31,992 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-10-22 11:22:31,993 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-10-22 11:22:32,001 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:22:31" (1/1) ... [2019-10-22 11:22:32,007 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:22:31" (1/1) ... [2019-10-22 11:22:32,023 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-10-22 11:22:32,023 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-22 11:22:32,023 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-22 11:22:32,024 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-22 11:22:32,081 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:22:31" (1/1) ... [2019-10-22 11:22:32,081 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:22:31" (1/1) ... [2019-10-22 11:22:32,082 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:22:31" (1/1) ... [2019-10-22 11:22:32,082 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:22:31" (1/1) ... [2019-10-22 11:22:32,085 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:22:31" (1/1) ... [2019-10-22 11:22:32,091 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:22:31" (1/1) ... [2019-10-22 11:22:32,092 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:22:31" (1/1) ... [2019-10-22 11:22:32,097 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-22 11:22:32,098 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-22 11:22:32,099 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-22 11:22:32,099 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-22 11:22:32,099 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:22:31" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_edafef40-03ba-4367-9b68-5558aca1f0d3/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 [2019-10-22 11:22:32,148 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-22 11:22:32,148 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-22 11:22:32,148 INFO L130 BoogieDeclarations]: Found specification of procedure ackermann [2019-10-22 11:22:32,148 INFO L138 BoogieDeclarations]: Found implementation of procedure ackermann [2019-10-22 11:22:32,289 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-22 11:22:32,289 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-10-22 11:22:32,290 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 11:22:32 BoogieIcfgContainer [2019-10-22 11:22:32,290 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-22 11:22:32,291 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-22 11:22:32,291 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-22 11:22:32,294 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-22 11:22:32,294 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.10 11:22:31" (1/3) ... [2019-10-22 11:22:32,295 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78f9b369 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 11:22:32, skipping insertion in model container [2019-10-22 11:22:32,295 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:22:31" (2/3) ... [2019-10-22 11:22:32,295 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78f9b369 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 11:22:32, skipping insertion in model container [2019-10-22 11:22:32,295 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 11:22:32" (3/3) ... [2019-10-22 11:22:32,297 INFO L109 eAbstractionObserver]: Analyzing ICFG Ackermann02.c [2019-10-22 11:22:32,305 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-22 11:22:32,311 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-22 11:22:32,318 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-22 11:22:32,335 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-22 11:22:32,335 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-22 11:22:32,336 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-22 11:22:32,336 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-22 11:22:32,336 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-22 11:22:32,336 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-22 11:22:32,336 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-22 11:22:32,336 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-22 11:22:32,355 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2019-10-22 11:22:32,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-10-22 11:22:32,360 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:22:32,361 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 11:22:32,362 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:22:32,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:22:32,366 INFO L82 PathProgramCache]: Analyzing trace with hash 1290447975, now seen corresponding path program 1 times [2019-10-22 11:22:32,375 INFO L157 tionRefinementEngine]: Executing refinement strategy WALRUS [2019-10-22 11:22:32,375 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [836232304] [2019-10-22 11:22:32,376 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_edafef40-03ba-4367-9b68-5558aca1f0d3/bin/utaipan/cvc4 Starting monitored process 2 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 11:22:32,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:22:32,449 INFO L256 TraceCheckSpWp]: Trace formula consists of 22 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-22 11:22:32,454 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:22:32,555 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:22:32,559 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:22:32,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:22:32,666 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [836232304] [2019-10-22 11:22:32,667 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-10-22 11:22:32,667 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6, 5] imperfect sequences [] total 9 [2019-10-22 11:22:32,667 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963555716] [2019-10-22 11:22:32,671 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-22 11:22:32,672 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-10-22 11:22:32,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-22 11:22:32,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2019-10-22 11:22:32,686 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 9 states. [2019-10-22 11:22:32,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:22:32,980 INFO L93 Difference]: Finished difference Result 65 states and 101 transitions. [2019-10-22 11:22:32,981 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-22 11:22:32,982 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 11 [2019-10-22 11:22:32,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:22:32,992 INFO L225 Difference]: With dead ends: 65 [2019-10-22 11:22:32,992 INFO L226 Difference]: Without dead ends: 32 [2019-10-22 11:22:32,996 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2019-10-22 11:22:33,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-10-22 11:22:33,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2019-10-22 11:22:33,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-10-22 11:22:33,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 50 transitions. [2019-10-22 11:22:33,042 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 50 transitions. Word has length 11 [2019-10-22 11:22:33,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:22:33,042 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 50 transitions. [2019-10-22 11:22:33,042 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-22 11:22:33,042 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 50 transitions. [2019-10-22 11:22:33,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-10-22 11:22:33,045 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:22:33,045 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 11:22:33,248 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 11:22:33,248 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:22:33,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:22:33,248 INFO L82 PathProgramCache]: Analyzing trace with hash 1161569483, now seen corresponding path program 1 times [2019-10-22 11:22:33,249 INFO L157 tionRefinementEngine]: Executing refinement strategy WALRUS [2019-10-22 11:22:33,249 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [55944951] [2019-10-22 11:22:33,249 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_edafef40-03ba-4367-9b68-5558aca1f0d3/bin/utaipan/cvc4 Starting monitored process 3 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 11:22:33,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:22:33,292 INFO L256 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-22 11:22:33,294 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:22:33,317 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-22 11:22:33,318 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:22:33,402 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-22 11:22:33,402 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [55944951] [2019-10-22 11:22:33,403 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426816833] [2019-10-22 11:22:33,403 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_edafef40-03ba-4367-9b68-5558aca1f0d3/bin/utaipan/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 11:22:33,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:22:33,443 INFO L256 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-22 11:22:33,445 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:22:33,448 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-22 11:22:33,448 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:22:33,500 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-22 11:22:33,501 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-22 11:22:33,501 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4] total 6 [2019-10-22 11:22:33,501 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416999715] [2019-10-22 11:22:33,506 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-22 11:22:33,506 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-10-22 11:22:33,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-22 11:22:33,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-10-22 11:22:33,507 INFO L87 Difference]: Start difference. First operand 32 states and 50 transitions. Second operand 6 states. [2019-10-22 11:22:33,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:22:33,578 INFO L93 Difference]: Finished difference Result 64 states and 128 transitions. [2019-10-22 11:22:33,579 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-22 11:22:33,579 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2019-10-22 11:22:33,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:22:33,581 INFO L225 Difference]: With dead ends: 64 [2019-10-22 11:22:33,581 INFO L226 Difference]: Without dead ends: 36 [2019-10-22 11:22:33,583 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 91 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2019-10-22 11:22:33,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-10-22 11:22:33,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2019-10-22 11:22:33,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-10-22 11:22:33,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 61 transitions. [2019-10-22 11:22:33,595 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 61 transitions. Word has length 25 [2019-10-22 11:22:33,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:22:33,595 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 61 transitions. [2019-10-22 11:22:33,596 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-22 11:22:33,596 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 61 transitions. [2019-10-22 11:22:33,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-10-22 11:22:33,598 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:22:33,598 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 11:22:33,999 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 cvc4 --incremental --print-success --lang smt --rewrite-divk,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 11:22:33,999 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:22:33,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:22:33,999 INFO L82 PathProgramCache]: Analyzing trace with hash -622900335, now seen corresponding path program 1 times [2019-10-22 11:22:34,000 INFO L157 tionRefinementEngine]: Executing refinement strategy WALRUS [2019-10-22 11:22:34,000 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [807731836] [2019-10-22 11:22:34,000 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_edafef40-03ba-4367-9b68-5558aca1f0d3/bin/utaipan/cvc4 Starting monitored process 5 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 11:22:34,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 11:22:34,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 11:22:34,141 INFO L168 tionRefinementEngine]: Strategy WALRUS found a feasible trace [2019-10-22 11:22:34,141 INFO L445 BasicCegarLoop]: Counterexample might be feasible [2019-10-22 11:22:34,342 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 11:22:34,363 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.10 11:22:34 BoogieIcfgContainer [2019-10-22 11:22:34,363 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-10-22 11:22:34,364 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-10-22 11:22:34,364 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-10-22 11:22:34,364 INFO L275 PluginConnector]: Witness Printer initialized [2019-10-22 11:22:34,365 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 11:22:32" (3/4) ... [2019-10-22 11:22:34,367 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-10-22 11:22:34,422 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_edafef40-03ba-4367-9b68-5558aca1f0d3/bin/utaipan/witness.graphml [2019-10-22 11:22:34,422 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-10-22 11:22:34,424 INFO L168 Benchmark]: Toolchain (without parser) took 2651.65 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 141.6 MB). Free memory was 951.0 MB in the beginning and 985.6 MB in the end (delta: -34.6 MB). Peak memory consumption was 106.9 MB. Max. memory is 11.5 GB. [2019-10-22 11:22:34,425 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 1.0 GB. Free memory is still 977.8 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 11:22:34,426 INFO L168 Benchmark]: CACSL2BoogieTranslator took 218.89 ms. Allocated memory is still 1.0 GB. Free memory was 951.0 MB in the beginning and 940.3 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2019-10-22 11:22:34,426 INFO L168 Benchmark]: Boogie Procedure Inliner took 30.81 ms. Allocated memory is still 1.0 GB. Free memory is still 940.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 11:22:34,426 INFO L168 Benchmark]: Boogie Preprocessor took 74.90 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 141.6 MB). Free memory was 940.3 MB in the beginning and 1.1 GB in the end (delta: -190.5 MB). Peak memory consumption was 12.6 MB. Max. memory is 11.5 GB. [2019-10-22 11:22:34,427 INFO L168 Benchmark]: RCFGBuilder took 192.08 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 11.8 MB). Peak memory consumption was 11.8 MB. Max. memory is 11.5 GB. [2019-10-22 11:22:34,427 INFO L168 Benchmark]: TraceAbstraction took 2072.18 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 985.6 MB in the end (delta: 133.4 MB). Peak memory consumption was 133.4 MB. Max. memory is 11.5 GB. [2019-10-22 11:22:34,427 INFO L168 Benchmark]: Witness Printer took 58.50 ms. Allocated memory is still 1.2 GB. Free memory is still 985.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 11:22:34,430 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 1.0 GB. Free memory is still 977.8 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 218.89 ms. Allocated memory is still 1.0 GB. Free memory was 951.0 MB in the beginning and 940.3 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 30.81 ms. Allocated memory is still 1.0 GB. Free memory is still 940.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 74.90 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 141.6 MB). Free memory was 940.3 MB in the beginning and 1.1 GB in the end (delta: -190.5 MB). Peak memory consumption was 12.6 MB. Max. memory is 11.5 GB. * RCFGBuilder took 192.08 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 11.8 MB). Peak memory consumption was 11.8 MB. Max. memory is 11.5 GB. * TraceAbstraction took 2072.18 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 985.6 MB in the end (delta: 133.4 MB). Peak memory consumption was 133.4 MB. Max. memory is 11.5 GB. * Witness Printer took 58.50 ms. Allocated memory is still 1.2 GB. Free memory is still 985.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 43]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L26] int m = __VERIFIER_nondet_int(); [L27] COND FALSE !(m < 0 || m > 3) [L32] int n = __VERIFIER_nondet_int(); [L33] COND FALSE !(n < 0 || n > 23) [L39] CALL, EXPR ackermann(m,n) VAL [\old(m)=2, \old(n)=0] [L15] COND FALSE !(m==0) VAL [\old(m)=2, \old(n)=0, m=2, n=0] [L18] COND TRUE n==0 VAL [\old(m)=2, \old(n)=0, m=2, n=0] [L19] CALL, EXPR ackermann(m-1,1) VAL [\old(m)=1, \old(n)=1] [L15] COND FALSE !(m==0) VAL [\old(m)=1, \old(n)=1, m=1, n=1] [L18] COND FALSE !(n==0) VAL [\old(m)=1, \old(n)=1, m=1, n=1] [L21] CALL, EXPR ackermann(m,n-1) VAL [\old(m)=1, \old(n)=0] [L15] COND FALSE !(m==0) VAL [\old(m)=1, \old(n)=0, m=1, n=0] [L18] COND TRUE n==0 VAL [\old(m)=1, \old(n)=0, m=1, n=0] [L19] CALL, EXPR ackermann(m-1,1) VAL [\old(m)=0, \old(n)=1] [L15] COND TRUE m==0 [L16] return n+1; VAL [\old(m)=0, \old(n)=1, \result=2, m=0, n=1] [L19] RET, EXPR ackermann(m-1,1) VAL [\old(m)=1, \old(n)=0, ackermann(m-1,1)=2, m=1, n=0] [L19] return ackermann(m-1,1); [L21] RET, EXPR ackermann(m,n-1) VAL [\old(m)=1, \old(n)=1, ackermann(m,n-1)=2, m=1, n=1] [L21] CALL, EXPR ackermann(m-1,ackermann(m,n-1)) VAL [\old(m)=0, \old(n)=2] [L15] COND TRUE m==0 [L16] return n+1; VAL [\old(m)=0, \old(n)=2, \result=3, m=0, n=2] [L21] RET, EXPR ackermann(m-1,ackermann(m,n-1)) VAL [\old(m)=1, \old(n)=1, ackermann(m,n-1)=2, ackermann(m-1,ackermann(m,n-1))=3, m=1, n=1] [L21] return ackermann(m-1,ackermann(m,n-1)); [L19] RET, EXPR ackermann(m-1,1) VAL [\old(m)=2, \old(n)=0, ackermann(m-1,1)=3, m=2, n=0] [L19] return ackermann(m-1,1); [L39] RET, EXPR ackermann(m,n) [L39] int result = ackermann(m,n); [L40] COND FALSE !(m < 2 || result >= 4) [L43] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 21 locations, 1 error locations. Result: UNSAFE, OverallTime: 2.0s, OverallIterations: 3, TraceHistogramMax: 5, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 44 SDtfs, 61 SDslu, 68 SDs, 0 SdLazy, 112 SolverSat, 52 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 121 GetRequests, 102 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=36occurred in iteration=2, 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, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 98 NumberOfCodeBlocks, 98 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 116 ConstructedInterpolants, 0 QuantifiedInterpolants, 4834 SizeOfPredicates, 4 NumberOfNonLiveVariables, 110 ConjunctsInSsa, 12 ConjunctsInUnsatCore, 6 InterpolantComputations, 2 PerfectInterpolantSequences, 56/60 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 incorrect! Received shutdown request...