./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/termination-crafted/Ackermann-1.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for overflows 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_d589a5e7-8e17-4889-9804-7407021a44bc/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_d589a5e7-8e17-4889-9804-7407021a44bc/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_d589a5e7-8e17-4889-9804-7407021a44bc/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_d589a5e7-8e17-4889-9804-7407021a44bc/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/termination-crafted/Ackermann-1.c -s /tmp/vcloud-vcloud-master/worker/working_dir_d589a5e7-8e17-4889-9804-7407021a44bc/bin/utaipan/config/svcomp-Overflow-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_d589a5e7-8e17-4889-9804-7407021a44bc/bin/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 5917ee93972738bd406398210804e4342159e8a8 ..................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(OVERFLOW) --- Real Ultimate output --- This is Ultimate 0.1.24-cad4683 [2019-10-22 11:23:44,191 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-22 11:23:44,194 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-22 11:23:44,203 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-22 11:23:44,203 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-22 11:23:44,204 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-22 11:23:44,205 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-22 11:23:44,206 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-22 11:23:44,208 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-22 11:23:44,209 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-22 11:23:44,209 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-22 11:23:44,210 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-22 11:23:44,211 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-22 11:23:44,211 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-22 11:23:44,212 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-22 11:23:44,213 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-22 11:23:44,213 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-22 11:23:44,214 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-22 11:23:44,215 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-22 11:23:44,217 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-22 11:23:44,218 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-22 11:23:44,219 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-22 11:23:44,219 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-22 11:23:44,220 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-22 11:23:44,221 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-22 11:23:44,221 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-22 11:23:44,222 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-22 11:23:44,222 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-22 11:23:44,222 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-22 11:23:44,223 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-22 11:23:44,223 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-22 11:23:44,223 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-22 11:23:44,224 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-22 11:23:44,225 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-22 11:23:44,225 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-22 11:23:44,225 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-22 11:23:44,226 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-22 11:23:44,226 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-22 11:23:44,226 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-22 11:23:44,227 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-22 11:23:44,227 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-22 11:23:44,228 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_d589a5e7-8e17-4889-9804-7407021a44bc/bin/utaipan/config/svcomp-Overflow-64bit-Taipan_Default.epf [2019-10-22 11:23:44,238 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-22 11:23:44,239 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-22 11:23:44,239 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-10-22 11:23:44,239 INFO L138 SettingsManager]: * User list type=DISABLED [2019-10-22 11:23:44,239 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-10-22 11:23:44,240 INFO L138 SettingsManager]: * Explicit value domain=true [2019-10-22 11:23:44,240 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-10-22 11:23:44,240 INFO L138 SettingsManager]: * Octagon Domain=false [2019-10-22 11:23:44,240 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-10-22 11:23:44,240 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-10-22 11:23:44,243 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-10-22 11:23:44,243 INFO L138 SettingsManager]: * Interval Domain=false [2019-10-22 11:23:44,244 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-22 11:23:44,244 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-10-22 11:23:44,244 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-22 11:23:44,244 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-22 11:23:44,245 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-22 11:23:44,245 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-22 11:23:44,245 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-22 11:23:44,245 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2019-10-22 11:23:44,245 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-22 11:23:44,245 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-22 11:23:44,246 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-22 11:23:44,246 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-22 11:23:44,246 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-22 11:23:44,246 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-22 11:23:44,246 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-22 11:23:44,246 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-22 11:23:44,246 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-22 11:23:44,247 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-22 11:23:44,247 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-10-22 11:23:44,247 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-22 11:23:44,247 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-22 11:23:44,247 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-22 11:23:44,247 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_d589a5e7-8e17-4889-9804-7407021a44bc/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 ! overflow) ) 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 -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5917ee93972738bd406398210804e4342159e8a8 [2019-10-22 11:23:44,285 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-22 11:23:44,295 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-22 11:23:44,297 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-22 11:23:44,298 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-22 11:23:44,299 INFO L275 PluginConnector]: CDTParser initialized [2019-10-22 11:23:44,299 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_d589a5e7-8e17-4889-9804-7407021a44bc/bin/utaipan/../../sv-benchmarks/c/termination-crafted/Ackermann-1.c [2019-10-22 11:23:44,344 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_d589a5e7-8e17-4889-9804-7407021a44bc/bin/utaipan/data/d7328b5da/2690e390687f40289e43b62c8f338d8e/FLAGd9d59bf23 [2019-10-22 11:23:44,730 INFO L306 CDTParser]: Found 1 translation units. [2019-10-22 11:23:44,731 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_d589a5e7-8e17-4889-9804-7407021a44bc/sv-benchmarks/c/termination-crafted/Ackermann-1.c [2019-10-22 11:23:44,736 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_d589a5e7-8e17-4889-9804-7407021a44bc/bin/utaipan/data/d7328b5da/2690e390687f40289e43b62c8f338d8e/FLAGd9d59bf23 [2019-10-22 11:23:44,751 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_d589a5e7-8e17-4889-9804-7407021a44bc/bin/utaipan/data/d7328b5da/2690e390687f40289e43b62c8f338d8e [2019-10-22 11:23:44,753 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-22 11:23:44,754 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-10-22 11:23:44,755 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-22 11:23:44,755 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-22 11:23:44,758 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-22 11:23:44,759 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 11:23:44" (1/1) ... [2019-10-22 11:23:44,766 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b56aeb4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:23:44, skipping insertion in model container [2019-10-22 11:23:44,766 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 11:23:44" (1/1) ... [2019-10-22 11:23:44,772 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-22 11:23:44,786 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-22 11:23:44,943 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 11:23:44,950 INFO L188 MainTranslator]: Completed pre-run [2019-10-22 11:23:45,020 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 11:23:45,034 INFO L192 MainTranslator]: Completed translation [2019-10-22 11:23:45,034 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:23:45 WrapperNode [2019-10-22 11:23:45,034 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-22 11:23:45,035 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-10-22 11:23:45,035 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-10-22 11:23:45,035 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-10-22 11:23:45,044 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:23:45" (1/1) ... [2019-10-22 11:23:45,049 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:23:45" (1/1) ... [2019-10-22 11:23:45,067 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-10-22 11:23:45,068 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-22 11:23:45,068 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-22 11:23:45,068 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-22 11:23:45,076 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:23:45" (1/1) ... [2019-10-22 11:23:45,076 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:23:45" (1/1) ... [2019-10-22 11:23:45,077 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:23:45" (1/1) ... [2019-10-22 11:23:45,078 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:23:45" (1/1) ... [2019-10-22 11:23:45,081 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:23:45" (1/1) ... [2019-10-22 11:23:45,087 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:23:45" (1/1) ... [2019-10-22 11:23:45,087 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:23:45" (1/1) ... [2019-10-22 11:23:45,089 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-22 11:23:45,089 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-22 11:23:45,089 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-22 11:23:45,090 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-22 11:23:45,090 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:23:45" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d589a5e7-8e17-4889-9804-7407021a44bc/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 11:23:45,151 INFO L130 BoogieDeclarations]: Found specification of procedure Ack [2019-10-22 11:23:45,151 INFO L138 BoogieDeclarations]: Found implementation of procedure Ack [2019-10-22 11:23:45,151 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-22 11:23:45,151 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-22 11:23:45,404 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-22 11:23:45,404 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-10-22 11:23:45,414 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 11:23:45 BoogieIcfgContainer [2019-10-22 11:23:45,414 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-22 11:23:45,415 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-22 11:23:45,415 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-22 11:23:45,418 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-22 11:23:45,418 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.10 11:23:44" (1/3) ... [2019-10-22 11:23:45,419 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77415eaa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 11:23:45, skipping insertion in model container [2019-10-22 11:23:45,419 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:23:45" (2/3) ... [2019-10-22 11:23:45,420 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77415eaa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 11:23:45, skipping insertion in model container [2019-10-22 11:23:45,420 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 11:23:45" (3/3) ... [2019-10-22 11:23:45,421 INFO L109 eAbstractionObserver]: Analyzing ICFG Ackermann-1.c [2019-10-22 11:23:45,429 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-22 11:23:45,436 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 8 error locations. [2019-10-22 11:23:45,447 INFO L249 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2019-10-22 11:23:45,470 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-22 11:23:45,470 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-22 11:23:45,470 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-22 11:23:45,471 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-22 11:23:45,471 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-22 11:23:45,471 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-22 11:23:45,471 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-22 11:23:45,471 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-22 11:23:45,496 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states. [2019-10-22 11:23:45,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-10-22 11:23:45,500 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:23:45,501 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-10-22 11:23:45,503 INFO L410 AbstractCegarLoop]: === Iteration 1 === [AckErr6ASSERT_VIOLATIONINTEGER_OVERFLOW, AckErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, AckErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, AckErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, AckErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, AckErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, AckErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, AckErr7ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-10-22 11:23:45,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:23:45,508 INFO L82 PathProgramCache]: Analyzing trace with hash 1868849109, now seen corresponding path program 1 times [2019-10-22 11:23:45,516 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-22 11:23:45,516 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800027729] [2019-10-22 11:23:45,516 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:23:45,516 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:23:45,517 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 11:23:45,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 11:23:45,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 11:23:45,630 INFO L168 tionRefinementEngine]: Strategy TAIPAN found a feasible trace [2019-10-22 11:23:45,631 INFO L445 BasicCegarLoop]: Counterexample might be feasible [2019-10-22 11:23:45,652 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.10 11:23:45 BoogieIcfgContainer [2019-10-22 11:23:45,652 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-10-22 11:23:45,652 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-10-22 11:23:45,652 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-10-22 11:23:45,653 INFO L275 PluginConnector]: Witness Printer initialized [2019-10-22 11:23:45,653 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 11:23:45" (3/4) ... [2019-10-22 11:23:45,655 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-10-22 11:23:45,692 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_d589a5e7-8e17-4889-9804-7407021a44bc/bin/utaipan/witness.graphml [2019-10-22 11:23:45,692 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-10-22 11:23:45,694 INFO L168 Benchmark]: Toolchain (without parser) took 939.60 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 124.8 MB). Free memory was 949.9 MB in the beginning and 1.1 GB in the end (delta: -127.5 MB). There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 11:23:45,695 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 1.0 GB. Free memory is still 967.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 11:23:45,695 INFO L168 Benchmark]: CACSL2BoogieTranslator took 279.71 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 124.8 MB). Free memory was 949.9 MB in the beginning and 1.1 GB in the end (delta: -169.1 MB). Peak memory consumption was 22.7 MB. Max. memory is 11.5 GB. [2019-10-22 11:23:45,696 INFO L168 Benchmark]: Boogie Procedure Inliner took 32.17 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 11:23:45,696 INFO L168 Benchmark]: Boogie Preprocessor took 21.54 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: 3.5 MB). Peak memory consumption was 3.5 MB. Max. memory is 11.5 GB. [2019-10-22 11:23:45,696 INFO L168 Benchmark]: RCFGBuilder took 325.02 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: 24.1 MB). Peak memory consumption was 24.1 MB. Max. memory is 11.5 GB. [2019-10-22 11:23:45,697 INFO L168 Benchmark]: TraceAbstraction took 236.94 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: 7.0 MB). Peak memory consumption was 7.0 MB. Max. memory is 11.5 GB. [2019-10-22 11:23:45,697 INFO L168 Benchmark]: Witness Printer took 40.18 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: 7.0 MB). Peak memory consumption was 7.0 MB. Max. memory is 11.5 GB. [2019-10-22 11:23:45,700 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 1.0 GB. Free memory is still 967.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 279.71 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 124.8 MB). Free memory was 949.9 MB in the beginning and 1.1 GB in the end (delta: -169.1 MB). Peak memory consumption was 22.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 32.17 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 21.54 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: 3.5 MB). Peak memory consumption was 3.5 MB. Max. memory is 11.5 GB. * RCFGBuilder took 325.02 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: 24.1 MB). Peak memory consumption was 24.1 MB. Max. memory is 11.5 GB. * TraceAbstraction took 236.94 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: 7.0 MB). Peak memory consumption was 7.0 MB. Max. memory is 11.5 GB. * Witness Printer took 40.18 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: 7.0 MB). Peak memory consumption was 7.0 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 10]: integer overflow possible integer overflow possible We found a FailurePath: [L16] int x = __VERIFIER_nondet_int(); [L17] int y = __VERIFIER_nondet_int(); [L18] COND FALSE !(x < 0 || y < 0) [L21] CALL Ack(x, y) VAL [\old(m)=0, \old(n)=2147483647] [L10] COND TRUE m == 0 VAL [\old(m)=0, \old(n)=2147483647, m=0, n=2147483647] [L10] n+1 VAL [\old(m)=0, \old(n)=2147483647, m=0, n=2147483647] - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 34 locations, 8 error locations. Result: UNSAFE, OverallTime: 0.1s, OverallIterations: 1, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=34occurred 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: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 6 NumberOfCodeBlocks, 6 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 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...