./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/signedintegeroverflow-regression/PrefixDecrement.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 6b5699aa Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_25660e52-245b-4eb9-b9db-e31e8891348a/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_25660e52-245b-4eb9-b9db-e31e8891348a/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_25660e52-245b-4eb9-b9db-e31e8891348a/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_25660e52-245b-4eb9-b9db-e31e8891348a/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/signedintegeroverflow-regression/PrefixDecrement.i -s /tmp/vcloud-vcloud-master/worker/run_dir_25660e52-245b-4eb9-b9db-e31e8891348a/bin/utaipan/config/svcomp-Overflow-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_25660e52-245b-4eb9-b9db-e31e8891348a/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 058f2b919df241022a2d1e4bdbdaa26cd8e08c13 ................................................................................................................................................................................................................................................................... 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 0.1.24-6b5699a [2019-11-26 02:44:19,232 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-26 02:44:19,233 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-26 02:44:19,243 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-26 02:44:19,244 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-26 02:44:19,246 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-26 02:44:19,247 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-26 02:44:19,256 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-26 02:44:19,257 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-26 02:44:19,258 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-26 02:44:19,259 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-26 02:44:19,260 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-26 02:44:19,260 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-26 02:44:19,261 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-26 02:44:19,261 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-26 02:44:19,262 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-26 02:44:19,263 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-26 02:44:19,264 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-26 02:44:19,266 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-26 02:44:19,267 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-26 02:44:19,271 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-26 02:44:19,273 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-26 02:44:19,274 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-26 02:44:19,275 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-26 02:44:19,278 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-26 02:44:19,278 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-26 02:44:19,278 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-26 02:44:19,279 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-26 02:44:19,280 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-26 02:44:19,280 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-26 02:44:19,280 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-26 02:44:19,281 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-26 02:44:19,281 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-26 02:44:19,282 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-26 02:44:19,286 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-26 02:44:19,286 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-26 02:44:19,287 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-26 02:44:19,287 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-26 02:44:19,287 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-26 02:44:19,289 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-26 02:44:19,290 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-26 02:44:19,291 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_25660e52-245b-4eb9-b9db-e31e8891348a/bin/utaipan/config/svcomp-Overflow-64bit-Taipan_Default.epf [2019-11-26 02:44:19,317 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-26 02:44:19,327 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-26 02:44:19,328 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-26 02:44:19,328 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-26 02:44:19,328 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-26 02:44:19,328 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-26 02:44:19,329 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-26 02:44:19,329 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-26 02:44:19,329 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-26 02:44:19,329 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-26 02:44:19,329 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-26 02:44:19,330 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-26 02:44:19,330 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-26 02:44:19,330 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-26 02:44:19,330 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-26 02:44:19,331 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-26 02:44:19,331 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-11-26 02:44:19,331 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-26 02:44:19,332 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-26 02:44:19,333 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-26 02:44:19,333 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-26 02:44:19,333 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-26 02:44:19,333 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2019-11-26 02:44:19,334 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-26 02:44:19,334 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-26 02:44:19,334 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-26 02:44:19,334 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-26 02:44:19,335 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-26 02:44:19,335 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-26 02:44:19,335 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-26 02:44:19,335 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-26 02:44:19,335 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-26 02:44:19,336 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-26 02:44:19,336 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-26 02:44:19,336 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-26 02:44:19,336 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-26 02:44:19,337 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_25660e52-245b-4eb9-b9db-e31e8891348a/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 -> 058f2b919df241022a2d1e4bdbdaa26cd8e08c13 [2019-11-26 02:44:19,496 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-26 02:44:19,507 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-26 02:44:19,510 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-26 02:44:19,517 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-26 02:44:19,518 INFO L275 PluginConnector]: CDTParser initialized [2019-11-26 02:44:19,518 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_25660e52-245b-4eb9-b9db-e31e8891348a/bin/utaipan/../../sv-benchmarks/c/signedintegeroverflow-regression/PrefixDecrement.i [2019-11-26 02:44:19,597 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_25660e52-245b-4eb9-b9db-e31e8891348a/bin/utaipan/data/81cdfd2f1/0432be92ffb1491fabc9fed0a8bffe11/FLAG1cdf2f1a4 [2019-11-26 02:44:20,031 INFO L306 CDTParser]: Found 1 translation units. [2019-11-26 02:44:20,032 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_25660e52-245b-4eb9-b9db-e31e8891348a/sv-benchmarks/c/signedintegeroverflow-regression/PrefixDecrement.i [2019-11-26 02:44:20,043 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_25660e52-245b-4eb9-b9db-e31e8891348a/bin/utaipan/data/81cdfd2f1/0432be92ffb1491fabc9fed0a8bffe11/FLAG1cdf2f1a4 [2019-11-26 02:44:20,400 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_25660e52-245b-4eb9-b9db-e31e8891348a/bin/utaipan/data/81cdfd2f1/0432be92ffb1491fabc9fed0a8bffe11 [2019-11-26 02:44:20,402 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-26 02:44:20,403 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-26 02:44:20,404 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-26 02:44:20,404 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-26 02:44:20,407 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-26 02:44:20,408 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 02:44:20" (1/1) ... [2019-11-26 02:44:20,410 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@755affdb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:44:20, skipping insertion in model container [2019-11-26 02:44:20,410 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 02:44:20" (1/1) ... [2019-11-26 02:44:20,416 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-26 02:44:20,453 INFO L179 MainTranslator]: Built tables and reachable declarations [2019-11-26 02:44:20,798 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-26 02:44:20,805 INFO L201 MainTranslator]: Completed pre-run [2019-11-26 02:44:20,842 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-26 02:44:20,892 INFO L205 MainTranslator]: Completed translation [2019-11-26 02:44:20,893 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:44:20 WrapperNode [2019-11-26 02:44:20,893 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-26 02:44:20,894 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-26 02:44:20,894 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-26 02:44:20,894 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-26 02:44:20,902 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:44:20" (1/1) ... [2019-11-26 02:44:20,914 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:44:20" (1/1) ... [2019-11-26 02:44:20,930 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-26 02:44:20,931 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-26 02:44:20,931 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-26 02:44:20,931 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-26 02:44:20,939 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:44:20" (1/1) ... [2019-11-26 02:44:20,940 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:44:20" (1/1) ... [2019-11-26 02:44:20,942 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:44:20" (1/1) ... [2019-11-26 02:44:20,942 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:44:20" (1/1) ... [2019-11-26 02:44:20,945 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:44:20" (1/1) ... [2019-11-26 02:44:20,949 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:44:20" (1/1) ... [2019-11-26 02:44:20,950 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:44:20" (1/1) ... [2019-11-26 02:44:20,952 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-26 02:44:20,952 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-26 02:44:20,952 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-26 02:44:20,952 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-26 02:44:20,953 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:44:20" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_25660e52-245b-4eb9-b9db-e31e8891348a/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 [2019-11-26 02:44:21,029 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-26 02:44:21,030 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-11-26 02:44:21,030 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-26 02:44:21,030 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-26 02:44:21,295 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-26 02:44:21,295 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-26 02:44:21,296 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 02:44:21 BoogieIcfgContainer [2019-11-26 02:44:21,296 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-26 02:44:21,297 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-26 02:44:21,297 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-26 02:44:21,300 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-26 02:44:21,300 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 02:44:20" (1/3) ... [2019-11-26 02:44:21,300 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4882836d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 02:44:21, skipping insertion in model container [2019-11-26 02:44:21,301 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:44:20" (2/3) ... [2019-11-26 02:44:21,301 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4882836d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 02:44:21, skipping insertion in model container [2019-11-26 02:44:21,301 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 02:44:21" (3/3) ... [2019-11-26 02:44:21,303 INFO L109 eAbstractionObserver]: Analyzing ICFG PrefixDecrement.i [2019-11-26 02:44:21,310 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-26 02:44:21,316 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2019-11-26 02:44:21,326 INFO L249 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2019-11-26 02:44:21,352 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-26 02:44:21,352 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-26 02:44:21,353 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-26 02:44:21,353 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-26 02:44:21,353 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-26 02:44:21,353 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-26 02:44:21,353 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-26 02:44:21,353 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-26 02:44:21,365 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states. [2019-11-26 02:44:21,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2019-11-26 02:44:21,370 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:44:21,371 INFO L410 BasicCegarLoop]: trace histogram [1, 1] [2019-11-26 02:44:21,371 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-11-26 02:44:21,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:44:21,377 INFO L82 PathProgramCache]: Analyzing trace with hash 1274, now seen corresponding path program 1 times [2019-11-26 02:44:21,385 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-26 02:44:21,385 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125768279] [2019-11-26 02:44:21,386 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-26 02:44:21,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:44:21,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:44:21,502 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125768279] [2019-11-26 02:44:21,502 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-26 02:44:21,503 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2019-11-26 02:44:21,503 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478302615] [2019-11-26 02:44:21,507 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-26 02:44:21,508 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-26 02:44:21,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-26 02:44:21,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-26 02:44:21,519 INFO L87 Difference]: Start difference. First operand 6 states. Second operand 3 states. [2019-11-26 02:44:21,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:44:21,543 INFO L93 Difference]: Finished difference Result 6 states and 5 transitions. [2019-11-26 02:44:21,543 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-26 02:44:21,544 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 2 [2019-11-26 02:44:21,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:44:21,552 INFO L225 Difference]: With dead ends: 6 [2019-11-26 02:44:21,553 INFO L226 Difference]: Without dead ends: 4 [2019-11-26 02:44:21,556 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-26 02:44:21,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4 states. [2019-11-26 02:44:21,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4 to 4. [2019-11-26 02:44:21,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2019-11-26 02:44:21,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 3 transitions. [2019-11-26 02:44:21,585 INFO L78 Accepts]: Start accepts. Automaton has 4 states and 3 transitions. Word has length 2 [2019-11-26 02:44:21,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:44:21,586 INFO L462 AbstractCegarLoop]: Abstraction has 4 states and 3 transitions. [2019-11-26 02:44:21,586 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-26 02:44:21,586 INFO L276 IsEmpty]: Start isEmpty. Operand 4 states and 3 transitions. [2019-11-26 02:44:21,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-11-26 02:44:21,586 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:44:21,586 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-11-26 02:44:21,587 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-11-26 02:44:21,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:44:21,587 INFO L82 PathProgramCache]: Analyzing trace with hash 39530, now seen corresponding path program 1 times [2019-11-26 02:44:21,587 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-26 02:44:21,588 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780354908] [2019-11-26 02:44:21,588 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-26 02:44:21,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-26 02:44:21,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-26 02:44:21,636 INFO L174 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2019-11-26 02:44:21,636 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-26 02:44:21,650 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.11 02:44:21 BoogieIcfgContainer [2019-11-26 02:44:21,651 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-26 02:44:21,651 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-26 02:44:21,651 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-26 02:44:21,652 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-26 02:44:21,652 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 02:44:21" (3/4) ... [2019-11-26 02:44:21,654 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-11-26 02:44:21,690 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_25660e52-245b-4eb9-b9db-e31e8891348a/bin/utaipan/witness.graphml [2019-11-26 02:44:21,691 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-26 02:44:21,693 INFO L168 Benchmark]: Toolchain (without parser) took 1288.92 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 103.8 MB). Free memory was 946.1 MB in the beginning and 1.0 GB in the end (delta: -90.2 MB). Peak memory consumption was 13.6 MB. Max. memory is 11.5 GB. [2019-11-26 02:44:21,693 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 1.0 GB. Free memory is still 962.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-26 02:44:21,694 INFO L168 Benchmark]: CACSL2BoogieTranslator took 489.41 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 103.8 MB). Free memory was 940.7 MB in the beginning and 1.1 GB in the end (delta: -147.1 MB). Peak memory consumption was 17.6 MB. Max. memory is 11.5 GB. [2019-11-26 02:44:21,695 INFO L168 Benchmark]: Boogie Procedure Inliner took 36.82 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-26 02:44:21,695 INFO L168 Benchmark]: Boogie Preprocessor took 21.04 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 6.9 MB). Peak memory consumption was 6.9 MB. Max. memory is 11.5 GB. [2019-11-26 02:44:21,696 INFO L168 Benchmark]: RCFGBuilder took 344.35 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 16.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 11.5 GB. [2019-11-26 02:44:21,696 INFO L168 Benchmark]: TraceAbstraction took 353.69 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 27.8 MB). Peak memory consumption was 27.8 MB. Max. memory is 11.5 GB. [2019-11-26 02:44:21,697 INFO L168 Benchmark]: Witness Printer took 39.69 ms. Allocated memory is still 1.1 GB. Free memory is still 1.0 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-26 02:44:21,700 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 1.0 GB. Free memory is still 962.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 489.41 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 103.8 MB). Free memory was 940.7 MB in the beginning and 1.1 GB in the end (delta: -147.1 MB). Peak memory consumption was 17.6 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 36.82 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 21.04 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 6.9 MB). Peak memory consumption was 6.9 MB. Max. memory is 11.5 GB. * RCFGBuilder took 344.35 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 16.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 11.5 GB. * TraceAbstraction took 353.69 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 27.8 MB). Peak memory consumption was 27.8 MB. Max. memory is 11.5 GB. * Witness Printer took 39.69 ms. Allocated memory is still 1.1 GB. Free memory is still 1.0 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 333]: integer overflow possible integer overflow possible We found a FailurePath: [L332] int x = -2147483647 - 1; [L333] --x - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 6 locations, 2 error locations. Result: UNSAFE, OverallTime: 0.2s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 1 SDtfs, 2 SDslu, 0 SDs, 0 SdLazy, 2 SolverSat, 1 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=6occurred 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, 5 NumberOfCodeBlocks, 5 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 1 ConstructedInterpolants, 0 QuantifiedInterpolants, 5 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, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...