./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/termination-crafted/Bangalore-1.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_560342fd-5a22-4298-b6bd-7da17588cfcd/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_560342fd-5a22-4298-b6bd-7da17588cfcd/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_560342fd-5a22-4298-b6bd-7da17588cfcd/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_560342fd-5a22-4298-b6bd-7da17588cfcd/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/termination-crafted/Bangalore-1.c -s /tmp/vcloud-vcloud-master/worker/run_dir_560342fd-5a22-4298-b6bd-7da17588cfcd/bin/utaipan/config/svcomp-Overflow-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_560342fd-5a22-4298-b6bd-7da17588cfcd/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 8453faee1973ffed1ccb53c7dc0c8b73cade6461 ........................................................................................................................................................................................................................................... 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 [2020-12-03 12:40:48,957 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-03 12:40:48,969 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-03 12:40:49,029 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-03 12:40:49,030 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-03 12:40:49,035 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-03 12:40:49,037 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-03 12:40:49,041 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-03 12:40:49,044 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-03 12:40:49,052 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-03 12:40:49,053 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-03 12:40:49,055 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-03 12:40:49,055 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-03 12:40:49,059 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-03 12:40:49,061 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-03 12:40:49,062 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-03 12:40:49,064 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-03 12:40:49,068 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-03 12:40:49,072 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-03 12:40:49,081 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-03 12:40:49,083 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-03 12:40:49,084 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-03 12:40:49,087 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-03 12:40:49,088 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-03 12:40:49,096 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-03 12:40:49,097 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-03 12:40:49,097 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-03 12:40:49,100 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-03 12:40:49,100 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-03 12:40:49,102 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-03 12:40:49,102 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-03 12:40:49,103 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-03 12:40:49,105 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-03 12:40:49,106 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-03 12:40:49,108 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-03 12:40:49,108 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-03 12:40:49,109 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-03 12:40:49,110 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-03 12:40:49,110 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-03 12:40:49,110 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-03 12:40:49,111 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-03 12:40:49,112 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_560342fd-5a22-4298-b6bd-7da17588cfcd/bin/utaipan/config/svcomp-Overflow-64bit-Taipan_Default.epf [2020-12-03 12:40:49,134 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-03 12:40:49,135 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-03 12:40:49,136 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-03 12:40:49,136 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-03 12:40:49,136 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-03 12:40:49,136 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-03 12:40:49,136 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-03 12:40:49,137 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-03 12:40:49,137 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-03 12:40:49,137 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-03 12:40:49,137 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-03 12:40:49,137 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-03 12:40:49,138 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-03 12:40:49,138 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-03 12:40:49,138 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-03 12:40:49,139 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-03 12:40:49,139 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-12-03 12:40:49,139 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-03 12:40:49,139 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-03 12:40:49,140 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-03 12:40:49,140 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-03 12:40:49,140 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-03 12:40:49,140 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2020-12-03 12:40:49,140 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-03 12:40:49,141 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-03 12:40:49,141 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-03 12:40:49,141 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-03 12:40:49,141 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-03 12:40:49,141 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-03 12:40:49,142 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-03 12:40:49,142 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-03 12:40:49,142 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-03 12:40:49,142 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-03 12:40:49,142 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-03 12:40:49,143 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-03 12:40:49,143 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-03 12:40:49,143 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-03 12:40:49,143 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_560342fd-5a22-4298-b6bd-7da17588cfcd/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_560342fd-5a22-4298-b6bd-7da17588cfcd/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8453faee1973ffed1ccb53c7dc0c8b73cade6461 [2020-12-03 12:40:49,385 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-03 12:40:49,406 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-03 12:40:49,411 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-03 12:40:49,412 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-03 12:40:49,413 INFO L275 PluginConnector]: CDTParser initialized [2020-12-03 12:40:49,414 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_560342fd-5a22-4298-b6bd-7da17588cfcd/bin/utaipan/../../sv-benchmarks/c/termination-crafted/Bangalore-1.c [2020-12-03 12:40:49,486 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_560342fd-5a22-4298-b6bd-7da17588cfcd/bin/utaipan/data/2390a3015/a4c6b344e56049a18f87c8736e227f6f/FLAGc1d1d3aa6 [2020-12-03 12:40:49,901 INFO L306 CDTParser]: Found 1 translation units. [2020-12-03 12:40:49,902 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_560342fd-5a22-4298-b6bd-7da17588cfcd/sv-benchmarks/c/termination-crafted/Bangalore-1.c [2020-12-03 12:40:49,912 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_560342fd-5a22-4298-b6bd-7da17588cfcd/bin/utaipan/data/2390a3015/a4c6b344e56049a18f87c8736e227f6f/FLAGc1d1d3aa6 [2020-12-03 12:40:49,932 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_560342fd-5a22-4298-b6bd-7da17588cfcd/bin/utaipan/data/2390a3015/a4c6b344e56049a18f87c8736e227f6f [2020-12-03 12:40:49,935 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-03 12:40:49,937 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-03 12:40:49,941 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-03 12:40:49,942 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-03 12:40:49,945 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-03 12:40:49,946 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.12 12:40:49" (1/1) ... [2020-12-03 12:40:49,953 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@61550a19 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:40:49, skipping insertion in model container [2020-12-03 12:40:49,954 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.12 12:40:49" (1/1) ... [2020-12-03 12:40:49,961 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-03 12:40:49,975 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-03 12:40:50,122 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-03 12:40:50,138 INFO L203 MainTranslator]: Completed pre-run [2020-12-03 12:40:50,151 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-03 12:40:50,163 INFO L208 MainTranslator]: Completed translation [2020-12-03 12:40:50,163 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:40:50 WrapperNode [2020-12-03 12:40:50,163 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-03 12:40:50,164 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-03 12:40:50,165 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-03 12:40:50,165 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-03 12:40:50,173 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:40:50" (1/1) ... [2020-12-03 12:40:50,178 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:40:50" (1/1) ... [2020-12-03 12:40:50,194 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-03 12:40:50,195 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-03 12:40:50,195 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-03 12:40:50,195 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-03 12:40:50,203 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:40:50" (1/1) ... [2020-12-03 12:40:50,204 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:40:50" (1/1) ... [2020-12-03 12:40:50,204 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:40:50" (1/1) ... [2020-12-03 12:40:50,205 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:40:50" (1/1) ... [2020-12-03 12:40:50,206 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:40:50" (1/1) ... [2020-12-03 12:40:50,210 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:40:50" (1/1) ... [2020-12-03 12:40:50,211 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:40:50" (1/1) ... [2020-12-03 12:40:50,212 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-03 12:40:50,213 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-03 12:40:50,213 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-03 12:40:50,214 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-03 12:40:50,214 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:40:50" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_560342fd-5a22-4298-b6bd-7da17588cfcd/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 [2020-12-03 12:40:50,295 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-03 12:40:50,296 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-03 12:40:50,470 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-03 12:40:50,470 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2020-12-03 12:40:50,472 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 12:40:50 BoogieIcfgContainer [2020-12-03 12:40:50,472 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-03 12:40:50,474 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-03 12:40:50,474 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-03 12:40:50,477 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-03 12:40:50,478 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.12 12:40:49" (1/3) ... [2020-12-03 12:40:50,478 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@648d47ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.12 12:40:50, skipping insertion in model container [2020-12-03 12:40:50,479 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:40:50" (2/3) ... [2020-12-03 12:40:50,479 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@648d47ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.12 12:40:50, skipping insertion in model container [2020-12-03 12:40:50,479 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 12:40:50" (3/3) ... [2020-12-03 12:40:50,480 INFO L111 eAbstractionObserver]: Analyzing ICFG Bangalore-1.c [2020-12-03 12:40:50,495 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-03 12:40:50,498 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-03 12:40:50,509 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-03 12:40:50,531 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-03 12:40:50,532 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-03 12:40:50,532 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-03 12:40:50,532 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-03 12:40:50,532 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-03 12:40:50,532 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-03 12:40:50,532 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-03 12:40:50,532 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-03 12:40:50,545 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states. [2020-12-03 12:40:50,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-12-03 12:40:50,549 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:40:50,549 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-12-03 12:40:50,550 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-03 12:40:50,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:40:50,555 INFO L82 PathProgramCache]: Analyzing trace with hash 957573, now seen corresponding path program 1 times [2020-12-03 12:40:50,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:40:50,565 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040566907] [2020-12-03 12:40:50,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:40:50,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-03 12:40:50,695 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-03 12:40:50,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-03 12:40:50,706 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-03 12:40:50,721 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2020-12-03 12:40:50,721 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-03 12:40:50,722 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-03 12:40:50,736 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.12 12:40:50 BoogieIcfgContainer [2020-12-03 12:40:50,736 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-03 12:40:50,737 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-03 12:40:50,737 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-03 12:40:50,737 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-03 12:40:50,738 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 12:40:50" (3/4) ... [2020-12-03 12:40:50,740 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-03 12:40:50,774 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_560342fd-5a22-4298-b6bd-7da17588cfcd/bin/utaipan/witness.graphml [2020-12-03 12:40:50,774 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-03 12:40:50,776 INFO L168 Benchmark]: Toolchain (without parser) took 838.49 ms. Allocated memory is still 104.9 MB. Free memory was 68.7 MB in the beginning and 57.7 MB in the end (delta: 10.9 MB). Peak memory consumption was 7.6 MB. Max. memory is 16.1 GB. [2020-12-03 12:40:50,777 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 104.9 MB. Free memory is still 84.9 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-03 12:40:50,778 INFO L168 Benchmark]: CACSL2BoogieTranslator took 222.44 ms. Allocated memory is still 104.9 MB. Free memory was 68.5 MB in the beginning and 82.5 MB in the end (delta: -14.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-12-03 12:40:50,779 INFO L168 Benchmark]: Boogie Procedure Inliner took 29.71 ms. Allocated memory is still 104.9 MB. Free memory was 82.5 MB in the beginning and 81.4 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-03 12:40:50,780 INFO L168 Benchmark]: Boogie Preprocessor took 17.46 ms. Allocated memory is still 104.9 MB. Free memory was 81.4 MB in the beginning and 80.4 MB in the end (delta: 977.1 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-03 12:40:50,781 INFO L168 Benchmark]: RCFGBuilder took 259.29 ms. Allocated memory is still 104.9 MB. Free memory was 80.4 MB in the beginning and 70.3 MB in the end (delta: 10.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-12-03 12:40:50,782 INFO L168 Benchmark]: TraceAbstraction took 262.15 ms. Allocated memory is still 104.9 MB. Free memory was 69.9 MB in the beginning and 59.5 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-12-03 12:40:50,783 INFO L168 Benchmark]: Witness Printer took 37.43 ms. Allocated memory is still 104.9 MB. Free memory was 59.5 MB in the beginning and 57.7 MB in the end (delta: 1.7 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-03 12:40:50,788 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 104.9 MB. Free memory is still 84.9 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 222.44 ms. Allocated memory is still 104.9 MB. Free memory was 68.5 MB in the beginning and 82.5 MB in the end (delta: -14.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 29.71 ms. Allocated memory is still 104.9 MB. Free memory was 82.5 MB in the beginning and 81.4 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 17.46 ms. Allocated memory is still 104.9 MB. Free memory was 81.4 MB in the beginning and 80.4 MB in the end (delta: 977.1 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 259.29 ms. Allocated memory is still 104.9 MB. Free memory was 80.4 MB in the beginning and 70.3 MB in the end (delta: 10.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 262.15 ms. Allocated memory is still 104.9 MB. Free memory was 69.9 MB in the beginning and 59.5 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Witness Printer took 37.43 ms. Allocated memory is still 104.9 MB. Free memory was 59.5 MB in the beginning and 57.7 MB in the end (delta: 1.7 MB). There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 19]: integer overflow possible integer overflow possible We found a FailurePath: [L13] int x; [L14] int y; [L15] x = __VERIFIER_nondet_int() [L16] y = __VERIFIER_nondet_int() [L17] COND TRUE y < 1 [L18] COND TRUE x >= 0 [L19] x - y - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 9 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.1s, OverallIterations: 1, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=9occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 4 NumberOfCodeBlocks, 4 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...