./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive/Addition02.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_9997765a-2d3a-400f-a71d-d8d44faf4ac4/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_9997765a-2d3a-400f-a71d-d8d44faf4ac4/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_9997765a-2d3a-400f-a71d-d8d44faf4ac4/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_9997765a-2d3a-400f-a71d-d8d44faf4ac4/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursive/Addition02.c -s /tmp/vcloud-vcloud-master/worker/working_dir_9997765a-2d3a-400f-a71d-d8d44faf4ac4/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_9997765a-2d3a-400f-a71d-d8d44faf4ac4/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 4f9a38be18608b9918f157c72437435dc654871f ................................................................................................................................................................................................................................................................................................................................. 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 11:26:43,077 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-22 11:26:43,079 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-22 11:26:43,091 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-22 11:26:43,091 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-22 11:26:43,092 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-22 11:26:43,093 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-22 11:26:43,094 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-22 11:26:43,095 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-22 11:26:43,096 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-22 11:26:43,097 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-22 11:26:43,099 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-22 11:26:43,099 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-22 11:26:43,100 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-22 11:26:43,101 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-22 11:26:43,101 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-22 11:26:43,102 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-22 11:26:43,103 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-22 11:26:43,110 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-22 11:26:43,112 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-22 11:26:43,113 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-22 11:26:43,114 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-22 11:26:43,115 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-22 11:26:43,117 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-22 11:26:43,119 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-22 11:26:43,119 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-22 11:26:43,119 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-22 11:26:43,120 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-22 11:26:43,121 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-22 11:26:43,121 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-22 11:26:43,121 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-22 11:26:43,122 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-22 11:26:43,122 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-22 11:26:43,123 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-22 11:26:43,124 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-22 11:26:43,124 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-22 11:26:43,125 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-22 11:26:43,125 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-22 11:26:43,125 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-22 11:26:43,126 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-22 11:26:43,126 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-22 11:26:43,127 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_9997765a-2d3a-400f-a71d-d8d44faf4ac4/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2019-10-22 11:26:43,139 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-22 11:26:43,139 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-22 11:26:43,140 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-10-22 11:26:43,140 INFO L138 SettingsManager]: * User list type=DISABLED [2019-10-22 11:26:43,140 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-10-22 11:26:43,140 INFO L138 SettingsManager]: * Explicit value domain=true [2019-10-22 11:26:43,141 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-10-22 11:26:43,141 INFO L138 SettingsManager]: * Octagon Domain=false [2019-10-22 11:26:43,141 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-10-22 11:26:43,141 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-10-22 11:26:43,141 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-10-22 11:26:43,141 INFO L138 SettingsManager]: * Interval Domain=false [2019-10-22 11:26:43,142 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-22 11:26:43,142 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-22 11:26:43,142 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-22 11:26:43,142 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-22 11:26:43,142 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-22 11:26:43,142 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-22 11:26:43,143 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-22 11:26:43,143 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-22 11:26:43,143 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-22 11:26:43,143 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-22 11:26:43,143 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-22 11:26:43,143 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-22 11:26:43,144 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-22 11:26:43,144 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-22 11:26:43,144 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-22 11:26:43,144 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-22 11:26:43,144 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-22 11:26:43,144 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-22 11:26:43,144 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-22 11:26:43,145 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-10-22 11:26:43,145 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-22 11:26:43,145 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-22 11:26:43,145 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-22 11:26:43,145 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_9997765a-2d3a-400f-a71d-d8d44faf4ac4/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 -> 4f9a38be18608b9918f157c72437435dc654871f [2019-10-22 11:26:43,169 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-22 11:26:43,179 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-22 11:26:43,182 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-22 11:26:43,183 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-22 11:26:43,183 INFO L275 PluginConnector]: CDTParser initialized [2019-10-22 11:26:43,184 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_9997765a-2d3a-400f-a71d-d8d44faf4ac4/bin/utaipan/../../sv-benchmarks/c/recursive/Addition02.c [2019-10-22 11:26:43,229 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_9997765a-2d3a-400f-a71d-d8d44faf4ac4/bin/utaipan/data/c032fb164/26665d8b15de476a876647d9bbdb3474/FLAG55ee622e0 [2019-10-22 11:26:43,605 INFO L306 CDTParser]: Found 1 translation units. [2019-10-22 11:26:43,605 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_9997765a-2d3a-400f-a71d-d8d44faf4ac4/sv-benchmarks/c/recursive/Addition02.c [2019-10-22 11:26:43,610 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_9997765a-2d3a-400f-a71d-d8d44faf4ac4/bin/utaipan/data/c032fb164/26665d8b15de476a876647d9bbdb3474/FLAG55ee622e0 [2019-10-22 11:26:43,620 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_9997765a-2d3a-400f-a71d-d8d44faf4ac4/bin/utaipan/data/c032fb164/26665d8b15de476a876647d9bbdb3474 [2019-10-22 11:26:43,622 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-22 11:26:43,623 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-10-22 11:26:43,624 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-22 11:26:43,624 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-22 11:26:43,628 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-22 11:26:43,628 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 11:26:43" (1/1) ... [2019-10-22 11:26:43,631 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@572e2db9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:26:43, skipping insertion in model container [2019-10-22 11:26:43,631 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 11:26:43" (1/1) ... [2019-10-22 11:26:43,638 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-22 11:26:43,649 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-22 11:26:43,774 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 11:26:43,778 INFO L188 MainTranslator]: Completed pre-run [2019-10-22 11:26:43,856 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 11:26:43,868 INFO L192 MainTranslator]: Completed translation [2019-10-22 11:26:43,869 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:26:43 WrapperNode [2019-10-22 11:26:43,869 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-22 11:26:43,870 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-10-22 11:26:43,870 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-10-22 11:26:43,870 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-10-22 11:26:43,878 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:26:43" (1/1) ... [2019-10-22 11:26:43,883 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:26:43" (1/1) ... [2019-10-22 11:26:43,900 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-10-22 11:26:43,901 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-22 11:26:43,901 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-22 11:26:43,901 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-22 11:26:43,911 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:26:43" (1/1) ... [2019-10-22 11:26:43,911 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:26:43" (1/1) ... [2019-10-22 11:26:43,912 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:26:43" (1/1) ... [2019-10-22 11:26:43,912 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:26:43" (1/1) ... [2019-10-22 11:26:43,914 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:26:43" (1/1) ... [2019-10-22 11:26:43,917 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:26:43" (1/1) ... [2019-10-22 11:26:43,918 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:26:43" (1/1) ... [2019-10-22 11:26:43,920 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-22 11:26:43,921 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-22 11:26:43,921 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-22 11:26:43,921 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-22 11:26:43,922 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:26:43" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9997765a-2d3a-400f-a71d-d8d44faf4ac4/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 11:26:43,987 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-22 11:26:43,987 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-22 11:26:43,987 INFO L130 BoogieDeclarations]: Found specification of procedure addition [2019-10-22 11:26:43,988 INFO L138 BoogieDeclarations]: Found implementation of procedure addition [2019-10-22 11:26:44,203 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-22 11:26:44,203 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-10-22 11:26:44,204 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 11:26:44 BoogieIcfgContainer [2019-10-22 11:26:44,204 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-22 11:26:44,205 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-22 11:26:44,205 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-22 11:26:44,208 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-22 11:26:44,209 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.10 11:26:43" (1/3) ... [2019-10-22 11:26:44,209 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19149cd2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 11:26:44, skipping insertion in model container [2019-10-22 11:26:44,210 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:26:43" (2/3) ... [2019-10-22 11:26:44,210 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19149cd2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 11:26:44, skipping insertion in model container [2019-10-22 11:26:44,210 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 11:26:44" (3/3) ... [2019-10-22 11:26:44,228 INFO L109 eAbstractionObserver]: Analyzing ICFG Addition02.c [2019-10-22 11:26:44,236 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-22 11:26:44,253 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-22 11:26:44,263 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-22 11:26:44,292 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-22 11:26:44,292 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-22 11:26:44,292 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-22 11:26:44,292 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-22 11:26:44,292 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-22 11:26:44,292 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-22 11:26:44,293 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-22 11:26:44,293 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-22 11:26:44,322 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2019-10-22 11:26:44,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-10-22 11:26:44,329 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:26:44,329 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 11:26:44,331 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:26:44,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:26:44,337 INFO L82 PathProgramCache]: Analyzing trace with hash -2068195676, now seen corresponding path program 1 times [2019-10-22 11:26:44,345 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-22 11:26:44,345 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468155322] [2019-10-22 11:26:44,345 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:26:44,346 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:26:44,346 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 11:26:44,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:26:44,585 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 11:26:44,585 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468155322] [2019-10-22 11:26:44,586 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 11:26:44,586 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-22 11:26:44,586 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316334590] [2019-10-22 11:26:44,590 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-22 11:26:44,592 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-22 11:26:44,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-22 11:26:44,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-10-22 11:26:44,605 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 7 states. [2019-10-22 11:26:44,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:26:44,789 INFO L93 Difference]: Finished difference Result 33 states and 41 transitions. [2019-10-22 11:26:44,790 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-22 11:26:44,791 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2019-10-22 11:26:44,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:26:44,801 INFO L225 Difference]: With dead ends: 33 [2019-10-22 11:26:44,803 INFO L226 Difference]: Without dead ends: 20 [2019-10-22 11:26:44,807 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2019-10-22 11:26:44,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-10-22 11:26:44,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-10-22 11:26:44,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-10-22 11:26:44,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 25 transitions. [2019-10-22 11:26:44,860 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 25 transitions. Word has length 11 [2019-10-22 11:26:44,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:26:44,860 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 25 transitions. [2019-10-22 11:26:44,860 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-22 11:26:44,860 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 25 transitions. [2019-10-22 11:26:44,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-10-22 11:26:44,862 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:26:44,862 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 11:26:44,864 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:26:44,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:26:44,864 INFO L82 PathProgramCache]: Analyzing trace with hash 800728349, now seen corresponding path program 1 times [2019-10-22 11:26:44,864 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-22 11:26:44,865 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142018873] [2019-10-22 11:26:44,865 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:26:44,865 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:26:44,866 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 11:26:44,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:26:44,910 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 11:26:44,911 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142018873] [2019-10-22 11:26:44,911 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 11:26:44,911 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-22 11:26:44,911 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173232298] [2019-10-22 11:26:44,912 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-22 11:26:44,913 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-22 11:26:44,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-22 11:26:44,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-22 11:26:44,913 INFO L87 Difference]: Start difference. First operand 20 states and 25 transitions. Second operand 4 states. [2019-10-22 11:26:44,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:26:44,952 INFO L93 Difference]: Finished difference Result 30 states and 38 transitions. [2019-10-22 11:26:44,953 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-22 11:26:44,953 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2019-10-22 11:26:44,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:26:44,954 INFO L225 Difference]: With dead ends: 30 [2019-10-22 11:26:44,954 INFO L226 Difference]: Without dead ends: 22 [2019-10-22 11:26:44,955 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-22 11:26:44,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-10-22 11:26:44,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 20. [2019-10-22 11:26:44,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-10-22 11:26:44,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2019-10-22 11:26:44,963 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 13 [2019-10-22 11:26:44,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:26:44,964 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2019-10-22 11:26:44,964 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-22 11:26:44,964 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2019-10-22 11:26:44,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-10-22 11:26:44,965 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:26:44,965 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 11:26:44,965 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:26:44,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:26:44,965 INFO L82 PathProgramCache]: Analyzing trace with hash 1352688745, now seen corresponding path program 1 times [2019-10-22 11:26:44,966 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-22 11:26:44,966 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641752172] [2019-10-22 11:26:44,966 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:26:44,966 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:26:44,966 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 11:26:44,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 11:26:45,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 11:26:45,039 INFO L168 tionRefinementEngine]: Strategy TAIPAN found a feasible trace [2019-10-22 11:26:45,039 INFO L445 BasicCegarLoop]: Counterexample might be feasible [2019-10-22 11:26:45,069 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.10 11:26:45 BoogieIcfgContainer [2019-10-22 11:26:45,069 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-10-22 11:26:45,070 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-10-22 11:26:45,070 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-10-22 11:26:45,070 INFO L275 PluginConnector]: Witness Printer initialized [2019-10-22 11:26:45,070 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 11:26:44" (3/4) ... [2019-10-22 11:26:45,072 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-10-22 11:26:45,109 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_9997765a-2d3a-400f-a71d-d8d44faf4ac4/bin/utaipan/witness.graphml [2019-10-22 11:26:45,110 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-10-22 11:26:45,112 INFO L168 Benchmark]: Toolchain (without parser) took 1488.24 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 168.8 MB). Free memory was 943.1 MB in the beginning and 1.1 GB in the end (delta: -138.3 MB). Peak memory consumption was 30.5 MB. Max. memory is 11.5 GB. [2019-10-22 11:26:45,113 INFO L168 Benchmark]: CDTParser took 0.16 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 11:26:45,116 INFO L168 Benchmark]: CACSL2BoogieTranslator took 244.93 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 168.8 MB). Free memory was 943.1 MB in the beginning and 1.2 GB in the end (delta: -216.8 MB). Peak memory consumption was 22.8 MB. Max. memory is 11.5 GB. [2019-10-22 11:26:45,119 INFO L168 Benchmark]: Boogie Procedure Inliner took 31.16 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 11:26:45,120 INFO L168 Benchmark]: Boogie Preprocessor took 19.74 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 11:26:45,120 INFO L168 Benchmark]: RCFGBuilder took 283.53 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 23.5 MB). Peak memory consumption was 23.5 MB. Max. memory is 11.5 GB. [2019-10-22 11:26:45,121 INFO L168 Benchmark]: TraceAbstraction took 864.28 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: 55.0 MB). Peak memory consumption was 55.0 MB. Max. memory is 11.5 GB. [2019-10-22 11:26:45,121 INFO L168 Benchmark]: Witness Printer took 40.65 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 11:26:45,123 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 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 244.93 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 168.8 MB). Free memory was 943.1 MB in the beginning and 1.2 GB in the end (delta: -216.8 MB). Peak memory consumption was 22.8 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 31.16 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 19.74 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 283.53 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 23.5 MB). Peak memory consumption was 23.5 MB. Max. memory is 11.5 GB. * TraceAbstraction took 864.28 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: 55.0 MB). Peak memory consumption was 55.0 MB. Max. memory is 11.5 GB. * Witness Printer took 40.65 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. * 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: [L27] int m = __VERIFIER_nondet_int(); [L28] COND FALSE !(m < 0 || m > 1073741823) [L33] int n = __VERIFIER_nondet_int(); [L34] COND FALSE !(n < 0 || n > 1073741823) [L39] CALL, EXPR addition(m,n) VAL [\old(m)=0, \old(n)=1] [L14] COND FALSE !(n == 0) VAL [\old(m)=0, \old(n)=1, m=0, n=1] [L17] COND TRUE n > 0 VAL [\old(m)=0, \old(n)=1, m=0, n=1] [L18] CALL, EXPR addition(m+1, n-1) VAL [\old(m)=1, \old(n)=0] [L14] COND TRUE n == 0 [L15] return m; VAL [\old(m)=1, \old(n)=0, \result=1, m=1, n=0] [L18] RET, EXPR addition(m+1, n-1) VAL [\old(m)=0, \old(n)=1, addition(m+1, n-1)=1, m=0, n=1] [L18] return addition(m+1, n-1); [L39] RET, EXPR addition(m,n) [L39] int result = addition(m,n); [L40] COND FALSE !(result == m - n) [L43] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 21 locations, 1 error locations. Result: UNSAFE, OverallTime: 0.7s, OverallIterations: 3, TraceHistogramMax: 2, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 42 SDtfs, 29 SDslu, 61 SDs, 0 SdLazy, 96 SolverSat, 3 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=21occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 2 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 42 NumberOfCodeBlocks, 42 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 22 ConstructedInterpolants, 0 QuantifiedInterpolants, 828 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 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...