./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/recursive-simple/sum_non_eq-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_e03fa7cd-11c8-4e49-bb38-cdc5924e810d/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_e03fa7cd-11c8-4e49-bb38-cdc5924e810d/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_e03fa7cd-11c8-4e49-bb38-cdc5924e810d/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_e03fa7cd-11c8-4e49-bb38-cdc5924e810d/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursive-simple/sum_non_eq-1.c -s /tmp/vcloud-vcloud-master/worker/run_dir_e03fa7cd-11c8-4e49-bb38-cdc5924e810d/bin/utaipan/config/svcomp-Overflow-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_e03fa7cd-11c8-4e49-bb38-cdc5924e810d/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 32bit --witnessprinter.graph.data.programhash eef8227d1054a6741230db166997e87d72b65f8e .......................................................................................................................................................................................................................................................................................... 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 0.2.0-7b2dab5 [2020-12-09 20:32:26,172 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 20:32:26,173 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 20:32:26,199 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 20:32:26,200 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 20:32:26,201 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 20:32:26,203 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 20:32:26,205 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 20:32:26,207 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 20:32:26,208 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 20:32:26,209 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 20:32:26,211 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 20:32:26,211 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 20:32:26,212 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 20:32:26,214 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 20:32:26,215 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 20:32:26,216 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 20:32:26,217 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 20:32:26,219 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 20:32:26,221 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 20:32:26,223 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 20:32:26,225 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 20:32:26,226 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 20:32:26,231 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 20:32:26,234 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 20:32:26,234 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 20:32:26,234 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 20:32:26,235 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 20:32:26,236 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 20:32:26,237 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 20:32:26,237 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 20:32:26,238 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 20:32:26,239 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 20:32:26,239 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 20:32:26,240 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 20:32:26,240 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 20:32:26,241 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 20:32:26,241 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 20:32:26,241 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 20:32:26,242 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 20:32:26,242 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 20:32:26,243 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_e03fa7cd-11c8-4e49-bb38-cdc5924e810d/bin/utaipan/config/svcomp-Overflow-32bit-Taipan_Default.epf [2020-12-09 20:32:26,269 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 20:32:26,270 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 20:32:26,270 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 20:32:26,271 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 20:32:26,271 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 20:32:26,271 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 20:32:26,271 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-09 20:32:26,271 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 20:32:26,274 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 20:32:26,274 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-09 20:32:26,274 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-09 20:32:26,274 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 20:32:26,274 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-09 20:32:26,275 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-09 20:32:26,275 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-09 20:32:26,275 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 20:32:26,275 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 20:32:26,275 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-12-09 20:32:26,276 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-09 20:32:26,276 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 20:32:26,276 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 20:32:26,276 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-09 20:32:26,276 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 20:32:26,276 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-09 20:32:26,276 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2020-12-09 20:32:26,276 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 20:32:26,277 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-09 20:32:26,277 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 20:32:26,277 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-09 20:32:26,277 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 20:32:26,277 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 20:32:26,277 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 20:32:26,277 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 20:32:26,277 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 20:32:26,278 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-09 20:32:26,278 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-09 20:32:26,278 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-09 20:32:26,278 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-09 20:32:26,278 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 20:32:26,278 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 20:32:26,278 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud-vcloud-master/worker/run_dir_e03fa7cd-11c8-4e49-bb38-cdc5924e810d/bin/utaipan/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_e03fa7cd-11c8-4e49-bb38-cdc5924e810d/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> eef8227d1054a6741230db166997e87d72b65f8e [2020-12-09 20:32:26,440 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 20:32:26,460 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 20:32:26,462 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 20:32:26,463 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 20:32:26,464 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 20:32:26,465 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_e03fa7cd-11c8-4e49-bb38-cdc5924e810d/bin/utaipan/../../sv-benchmarks/c/recursive-simple/sum_non_eq-1.c [2020-12-09 20:32:26,504 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_e03fa7cd-11c8-4e49-bb38-cdc5924e810d/bin/utaipan/data/ffe5c33b3/1e9ef5036f7a4b5e8a917605bc6c49aa/FLAG72280eca2 [2020-12-09 20:32:26,854 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 20:32:26,854 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_e03fa7cd-11c8-4e49-bb38-cdc5924e810d/sv-benchmarks/c/recursive-simple/sum_non_eq-1.c [2020-12-09 20:32:26,859 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_e03fa7cd-11c8-4e49-bb38-cdc5924e810d/bin/utaipan/data/ffe5c33b3/1e9ef5036f7a4b5e8a917605bc6c49aa/FLAG72280eca2 [2020-12-09 20:32:26,868 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_e03fa7cd-11c8-4e49-bb38-cdc5924e810d/bin/utaipan/data/ffe5c33b3/1e9ef5036f7a4b5e8a917605bc6c49aa [2020-12-09 20:32:26,869 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 20:32:26,870 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 20:32:26,871 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 20:32:26,871 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 20:32:26,874 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 20:32:26,874 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 08:32:26" (1/1) ... [2020-12-09 20:32:26,875 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@515312a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:32:26, skipping insertion in model container [2020-12-09 20:32:26,876 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 08:32:26" (1/1) ... [2020-12-09 20:32:26,880 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 20:32:26,889 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 20:32:27,017 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_e03fa7cd-11c8-4e49-bb38-cdc5924e810d/sv-benchmarks/c/recursive-simple/sum_non_eq-1.c[563,576] [2020-12-09 20:32:27,018 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 20:32:27,025 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 20:32:27,035 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_e03fa7cd-11c8-4e49-bb38-cdc5924e810d/sv-benchmarks/c/recursive-simple/sum_non_eq-1.c[563,576] [2020-12-09 20:32:27,035 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 20:32:27,045 INFO L208 MainTranslator]: Completed translation [2020-12-09 20:32:27,046 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:32:27 WrapperNode [2020-12-09 20:32:27,046 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 20:32:27,047 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 20:32:27,047 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 20:32:27,047 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 20:32:27,052 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:32:27" (1/1) ... [2020-12-09 20:32:27,057 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:32:27" (1/1) ... [2020-12-09 20:32:27,068 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 20:32:27,069 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 20:32:27,069 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 20:32:27,069 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 20:32:27,075 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:32:27" (1/1) ... [2020-12-09 20:32:27,075 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:32:27" (1/1) ... [2020-12-09 20:32:27,076 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:32:27" (1/1) ... [2020-12-09 20:32:27,076 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:32:27" (1/1) ... [2020-12-09 20:32:27,078 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:32:27" (1/1) ... [2020-12-09 20:32:27,079 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:32:27" (1/1) ... [2020-12-09 20:32:27,080 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:32:27" (1/1) ... [2020-12-09 20:32:27,081 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 20:32:27,082 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 20:32:27,082 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 20:32:27,082 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 20:32:27,083 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:32:27" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e03fa7cd-11c8-4e49-bb38-cdc5924e810d/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 [2020-12-09 20:32:27,137 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 20:32:27,137 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 20:32:27,137 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2020-12-09 20:32:27,138 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2020-12-09 20:32:27,138 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-09 20:32:27,138 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 20:32:27,299 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 20:32:27,300 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2020-12-09 20:32:27,301 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 08:32:27 BoogieIcfgContainer [2020-12-09 20:32:27,301 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 20:32:27,302 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 20:32:27,303 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 20:32:27,305 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 20:32:27,306 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 08:32:26" (1/3) ... [2020-12-09 20:32:27,306 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4dab3a5d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 08:32:27, skipping insertion in model container [2020-12-09 20:32:27,306 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:32:27" (2/3) ... [2020-12-09 20:32:27,307 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4dab3a5d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 08:32:27, skipping insertion in model container [2020-12-09 20:32:27,307 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 08:32:27" (3/3) ... [2020-12-09 20:32:27,308 INFO L111 eAbstractionObserver]: Analyzing ICFG sum_non_eq-1.c [2020-12-09 20:32:27,318 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 20:32:27,321 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 6 error locations. [2020-12-09 20:32:27,329 INFO L253 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2020-12-09 20:32:27,346 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 20:32:27,346 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-09 20:32:27,346 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 20:32:27,346 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 20:32:27,346 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 20:32:27,347 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 20:32:27,347 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 20:32:27,347 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 20:32:27,358 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2020-12-09 20:32:27,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-12-09 20:32:27,362 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 20:32:27,362 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-12-09 20:32:27,362 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, sumErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, sumErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, sumErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, sumErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-09 20:32:27,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 20:32:27,366 INFO L82 PathProgramCache]: Analyzing trace with hash 65708151, now seen corresponding path program 1 times [2020-12-09 20:32:27,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 20:32:27,373 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841510020] [2020-12-09 20:32:27,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 20:32:27,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:32:27,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 20:32:27,521 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841510020] [2020-12-09 20:32:27,521 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 20:32:27,522 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 20:32:27,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64690038] [2020-12-09 20:32:27,526 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 20:32:27,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 20:32:27,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 20:32:27,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-09 20:32:27,542 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 5 states. [2020-12-09 20:32:27,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 20:32:27,604 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2020-12-09 20:32:27,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 20:32:27,606 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 5 [2020-12-09 20:32:27,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 20:32:27,613 INFO L225 Difference]: With dead ends: 22 [2020-12-09 20:32:27,613 INFO L226 Difference]: Without dead ends: 20 [2020-12-09 20:32:27,615 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-09 20:32:27,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-12-09 20:32:27,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-12-09 20:32:27,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-12-09 20:32:27,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-12-09 20:32:27,643 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 5 [2020-12-09 20:32:27,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 20:32:27,644 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-12-09 20:32:27,644 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 20:32:27,644 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-12-09 20:32:27,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-09 20:32:27,645 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 20:32:27,645 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-09 20:32:27,645 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-09 20:32:27,646 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, sumErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, sumErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, sumErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, sumErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-09 20:32:27,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 20:32:27,646 INFO L82 PathProgramCache]: Analyzing trace with hash 2036952738, now seen corresponding path program 1 times [2020-12-09 20:32:27,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 20:32:27,647 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507531352] [2020-12-09 20:32:27,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 20:32:27,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 20:32:27,665 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 20:32:27,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 20:32:27,676 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 20:32:27,688 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2020-12-09 20:32:27,689 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-09 20:32:27,689 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-09 20:32:27,705 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 08:32:27 BoogieIcfgContainer [2020-12-09 20:32:27,705 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 20:32:27,706 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 20:32:27,706 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 20:32:27,706 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 20:32:27,706 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 08:32:27" (3/4) ... [2020-12-09 20:32:27,708 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-09 20:32:27,731 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_e03fa7cd-11c8-4e49-bb38-cdc5924e810d/bin/utaipan/witness.graphml [2020-12-09 20:32:27,731 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 20:32:27,732 INFO L168 Benchmark]: Toolchain (without parser) took 861.25 ms. Allocated memory was 71.3 MB in the beginning and 88.1 MB in the end (delta: 16.8 MB). Free memory was 27.8 MB in the beginning and 47.1 MB in the end (delta: -19.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 20:32:27,733 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 71.3 MB. Free memory is still 43.7 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 20:32:27,733 INFO L168 Benchmark]: CACSL2BoogieTranslator took 174.80 ms. Allocated memory was 71.3 MB in the beginning and 88.1 MB in the end (delta: 16.8 MB). Free memory was 27.6 MB in the beginning and 62.4 MB in the end (delta: -34.8 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-12-09 20:32:27,733 INFO L168 Benchmark]: Boogie Procedure Inliner took 21.69 ms. Allocated memory is still 88.1 MB. Free memory was 62.4 MB in the beginning and 61.2 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 20:32:27,734 INFO L168 Benchmark]: Boogie Preprocessor took 12.23 ms. Allocated memory is still 88.1 MB. Free memory was 61.2 MB in the beginning and 60.0 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 20:32:27,734 INFO L168 Benchmark]: RCFGBuilder took 219.79 ms. Allocated memory is still 88.1 MB. Free memory was 60.0 MB in the beginning and 44.2 MB in the end (delta: 15.9 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2020-12-09 20:32:27,735 INFO L168 Benchmark]: TraceAbstraction took 402.74 ms. Allocated memory is still 88.1 MB. Free memory was 43.9 MB in the beginning and 48.8 MB in the end (delta: -4.9 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 20:32:27,735 INFO L168 Benchmark]: Witness Printer took 25.24 ms. Allocated memory is still 88.1 MB. Free memory was 48.8 MB in the beginning and 47.1 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 20:32:27,738 INFO L339 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 71.3 MB. Free memory is still 43.7 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 174.80 ms. Allocated memory was 71.3 MB in the beginning and 88.1 MB in the end (delta: 16.8 MB). Free memory was 27.6 MB in the beginning and 62.4 MB in the end (delta: -34.8 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 21.69 ms. Allocated memory is still 88.1 MB. Free memory was 62.4 MB in the beginning and 61.2 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 12.23 ms. Allocated memory is still 88.1 MB. Free memory was 61.2 MB in the beginning and 60.0 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 219.79 ms. Allocated memory is still 88.1 MB. Free memory was 60.0 MB in the beginning and 44.2 MB in the end (delta: 15.9 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 402.74 ms. Allocated memory is still 88.1 MB. Free memory was 43.9 MB in the beginning and 48.8 MB in the end (delta: -4.9 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 25.24 ms. Allocated memory is still 88.1 MB. Free memory was 48.8 MB in the beginning and 47.1 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 10]: integer overflow possible integer overflow possible We found a FailurePath: [L15] int a = __VERIFIER_nondet_int() ; [L16] int b = __VERIFIER_nondet_int(); [L17] CALL sum(a, b) VAL [\old(m)=0, \old(n)=-2147483648] [L7] COND FALSE !(n == 0) VAL [\old(m)=0, \old(n)=-2147483648, m=0, n=-2147483648] [L10] n - 1 VAL [\old(m)=0, \old(n)=-2147483648, m=0, n=-2147483648] - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 22 locations, 6 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.3s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 10 SDtfs, 27 SDslu, 12 SDs, 0 SdLazy, 31 SolverSat, 3 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=22occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 11 NumberOfCodeBlocks, 11 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 4 ConstructedInterpolants, 0 QuantifiedInterpolants, 48 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...