./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/mult_array_unsafe.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_4d52d934-2c50-4f62-a4d7-9e1cd30810c0/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_4d52d934-2c50-4f62-a4d7-9e1cd30810c0/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_4d52d934-2c50-4f62-a4d7-9e1cd30810c0/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_4d52d934-2c50-4f62-a4d7-9e1cd30810c0/bin/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/mult_array_unsafe.i -s /tmp/vcloud-vcloud-master/worker/run_dir_4d52d934-2c50-4f62-a4d7-9e1cd30810c0/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_4d52d934-2c50-4f62-a4d7-9e1cd30810c0/bin/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4ceec10d001c6e3ab8acae30cb42f114023e2890 ............................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(valid-deref) --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2020-12-09 05:43:05,186 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 05:43:05,188 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 05:43:05,209 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 05:43:05,209 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 05:43:05,210 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 05:43:05,211 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 05:43:05,218 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 05:43:05,219 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 05:43:05,220 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 05:43:05,221 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 05:43:05,223 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 05:43:05,223 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 05:43:05,224 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 05:43:05,225 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 05:43:05,227 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 05:43:05,227 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 05:43:05,228 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 05:43:05,230 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 05:43:05,232 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 05:43:05,234 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 05:43:05,236 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 05:43:05,237 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 05:43:05,238 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 05:43:05,241 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 05:43:05,241 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 05:43:05,241 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 05:43:05,242 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 05:43:05,243 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 05:43:05,244 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 05:43:05,244 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 05:43:05,244 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 05:43:05,245 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 05:43:05,246 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 05:43:05,247 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 05:43:05,247 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 05:43:05,247 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 05:43:05,247 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 05:43:05,248 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 05:43:05,248 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 05:43:05,249 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 05:43:05,249 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_4d52d934-2c50-4f62-a4d7-9e1cd30810c0/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2020-12-09 05:43:05,272 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 05:43:05,273 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 05:43:05,273 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 05:43:05,274 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 05:43:05,274 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 05:43:05,274 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 05:43:05,274 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-09 05:43:05,274 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 05:43:05,274 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 05:43:05,274 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-09 05:43:05,274 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-09 05:43:05,275 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 05:43:05,275 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-09 05:43:05,275 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-09 05:43:05,275 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-09 05:43:05,276 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-09 05:43:05,276 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-09 05:43:05,276 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 05:43:05,276 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 05:43:05,276 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-12-09 05:43:05,276 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-09 05:43:05,276 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 05:43:05,276 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 05:43:05,277 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-12-09 05:43:05,277 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-12-09 05:43:05,277 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-12-09 05:43:05,277 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 05:43:05,277 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 05:43:05,277 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 05:43:05,277 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 05:43:05,277 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 05:43:05,277 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 05:43:05,278 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 05:43:05,278 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 05:43:05,278 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 05:43:05,278 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-09 05:43:05,278 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-09 05:43:05,278 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 05:43:05,278 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 05:43:05,278 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_4d52d934-2c50-4f62-a4d7-9e1cd30810c0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_4d52d934-2c50-4f62-a4d7-9e1cd30810c0/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4ceec10d001c6e3ab8acae30cb42f114023e2890 [2020-12-09 05:43:05,460 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 05:43:05,476 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 05:43:05,478 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 05:43:05,479 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 05:43:05,479 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 05:43:05,480 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_4d52d934-2c50-4f62-a4d7-9e1cd30810c0/bin/utaipan/../../sv-benchmarks/c/array-memsafety/mult_array_unsafe.i [2020-12-09 05:43:05,520 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_4d52d934-2c50-4f62-a4d7-9e1cd30810c0/bin/utaipan/data/a727a721f/9f6bf791692c416786c5c8352ef3b5d6/FLAG82a591236 [2020-12-09 05:43:05,936 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 05:43:05,937 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_4d52d934-2c50-4f62-a4d7-9e1cd30810c0/sv-benchmarks/c/array-memsafety/mult_array_unsafe.i [2020-12-09 05:43:05,947 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_4d52d934-2c50-4f62-a4d7-9e1cd30810c0/bin/utaipan/data/a727a721f/9f6bf791692c416786c5c8352ef3b5d6/FLAG82a591236 [2020-12-09 05:43:05,957 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_4d52d934-2c50-4f62-a4d7-9e1cd30810c0/bin/utaipan/data/a727a721f/9f6bf791692c416786c5c8352ef3b5d6 [2020-12-09 05:43:05,958 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 05:43:05,959 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 05:43:05,961 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 05:43:05,961 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 05:43:05,965 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 05:43:05,965 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 05:43:05" (1/1) ... [2020-12-09 05:43:05,967 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6c9cd057 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:43:05, skipping insertion in model container [2020-12-09 05:43:05,967 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 05:43:05" (1/1) ... [2020-12-09 05:43:05,973 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 05:43:06,003 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 05:43:06,168 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 05:43:06,174 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 05:43:06,204 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 05:43:06,238 INFO L208 MainTranslator]: Completed translation [2020-12-09 05:43:06,238 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:43:06 WrapperNode [2020-12-09 05:43:06,238 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 05:43:06,239 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 05:43:06,239 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 05:43:06,239 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 05:43:06,245 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:43:06" (1/1) ... [2020-12-09 05:43:06,254 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:43:06" (1/1) ... [2020-12-09 05:43:06,267 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 05:43:06,268 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 05:43:06,268 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 05:43:06,268 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 05:43:06,274 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:43:06" (1/1) ... [2020-12-09 05:43:06,274 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:43:06" (1/1) ... [2020-12-09 05:43:06,276 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:43:06" (1/1) ... [2020-12-09 05:43:06,276 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:43:06" (1/1) ... [2020-12-09 05:43:06,280 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:43:06" (1/1) ... [2020-12-09 05:43:06,283 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:43:06" (1/1) ... [2020-12-09 05:43:06,284 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:43:06" (1/1) ... [2020-12-09 05:43:06,285 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 05:43:06,286 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 05:43:06,286 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 05:43:06,286 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 05:43:06,287 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:43:06" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4d52d934-2c50-4f62-a4d7-9e1cd30810c0/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 05:43:06,340 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-09 05:43:06,340 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-09 05:43:06,341 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 05:43:06,341 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-09 05:43:06,341 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 05:43:06,341 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 05:43:06,657 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 05:43:06,657 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2020-12-09 05:43:06,659 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 05:43:06 BoogieIcfgContainer [2020-12-09 05:43:06,659 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 05:43:06,660 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 05:43:06,660 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 05:43:06,662 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 05:43:06,663 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 05:43:05" (1/3) ... [2020-12-09 05:43:06,663 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a99ff01 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 05:43:06, skipping insertion in model container [2020-12-09 05:43:06,663 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:43:06" (2/3) ... [2020-12-09 05:43:06,663 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a99ff01 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 05:43:06, skipping insertion in model container [2020-12-09 05:43:06,664 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 05:43:06" (3/3) ... [2020-12-09 05:43:06,665 INFO L111 eAbstractionObserver]: Analyzing ICFG mult_array_unsafe.i [2020-12-09 05:43:06,674 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 05:43:06,677 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 7 error locations. [2020-12-09 05:43:06,684 INFO L253 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2020-12-09 05:43:06,698 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 05:43:06,698 INFO L378 AbstractCegarLoop]: Hoare is false [2020-12-09 05:43:06,698 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 05:43:06,698 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 05:43:06,698 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 05:43:06,698 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 05:43:06,699 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 05:43:06,699 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 05:43:06,707 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states. [2020-12-09 05:43:06,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-12-09 05:43:06,710 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 05:43:06,711 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-12-09 05:43:06,711 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-09 05:43:06,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 05:43:06,715 INFO L82 PathProgramCache]: Analyzing trace with hash 107322, now seen corresponding path program 1 times [2020-12-09 05:43:06,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 05:43:06,721 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960002349] [2020-12-09 05:43:06,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 05:43:06,778 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-09 05:43:06,778 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2062552016] [2020-12-09 05:43:06,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4d52d934-2c50-4f62-a4d7-9e1cd30810c0/bin/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 05:43:06,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 05:43:06,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-09 05:43:06,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 05:43:06,895 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 05:43:06,895 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 05:43:06,909 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 05:43:06,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960002349] [2020-12-09 05:43:06,910 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 05:43:06,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062552016] [2020-12-09 05:43:06,910 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-12-09 05:43:06,911 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2020-12-09 05:43:06,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368509417] [2020-12-09 05:43:06,914 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 05:43:06,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 05:43:06,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 05:43:06,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 05:43:06,926 INFO L87 Difference]: Start difference. First operand 16 states. Second operand 4 states. [2020-12-09 05:43:06,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 05:43:06,952 INFO L93 Difference]: Finished difference Result 16 states and 17 transitions. [2020-12-09 05:43:06,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 05:43:06,953 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 3 [2020-12-09 05:43:06,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 05:43:06,958 INFO L225 Difference]: With dead ends: 16 [2020-12-09 05:43:06,959 INFO L226 Difference]: Without dead ends: 15 [2020-12-09 05:43:06,960 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 05:43:06,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-12-09 05:43:06,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-12-09 05:43:06,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-12-09 05:43:06,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2020-12-09 05:43:06,980 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 3 [2020-12-09 05:43:06,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 05:43:06,980 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2020-12-09 05:43:06,980 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 05:43:06,980 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2020-12-09 05:43:06,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-12-09 05:43:06,980 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 05:43:06,981 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-12-09 05:43:07,181 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2020-12-09 05:43:07,182 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-09 05:43:07,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 05:43:07,183 INFO L82 PathProgramCache]: Analyzing trace with hash 3327913, now seen corresponding path program 1 times [2020-12-09 05:43:07,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 05:43:07,183 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169284607] [2020-12-09 05:43:07,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 05:43:07,187 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-09 05:43:07,188 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [225867235] [2020-12-09 05:43:07,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4d52d934-2c50-4f62-a4d7-9e1cd30810c0/bin/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 05:43:07,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 05:43:07,214 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 05:43:07,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 05:43:07,221 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 05:43:07,236 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2020-12-09 05:43:07,237 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-09 05:43:07,438 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 05:43:07,486 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 05:43:07 BoogieIcfgContainer [2020-12-09 05:43:07,486 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 05:43:07,488 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 05:43:07,488 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 05:43:07,488 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 05:43:07,490 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 05:43:06" (3/4) ... [2020-12-09 05:43:07,495 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-09 05:43:07,548 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_4d52d934-2c50-4f62-a4d7-9e1cd30810c0/bin/utaipan/witness.graphml [2020-12-09 05:43:07,548 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 05:43:07,549 INFO L168 Benchmark]: Toolchain (without parser) took 1588.79 ms. Allocated memory is still 94.4 MB. Free memory was 53.8 MB in the beginning and 40.3 MB in the end (delta: 13.4 MB). Peak memory consumption was 15.0 MB. Max. memory is 16.1 GB. [2020-12-09 05:43:07,550 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 94.4 MB. Free memory is still 71.0 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 05:43:07,550 INFO L168 Benchmark]: CACSL2BoogieTranslator took 277.54 ms. Allocated memory is still 94.4 MB. Free memory was 53.6 MB in the beginning and 59.2 MB in the end (delta: -5.6 MB). Peak memory consumption was 9.8 MB. Max. memory is 16.1 GB. [2020-12-09 05:43:07,551 INFO L168 Benchmark]: Boogie Procedure Inliner took 28.30 ms. Allocated memory is still 94.4 MB. Free memory was 59.2 MB in the beginning and 57.5 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 05:43:07,551 INFO L168 Benchmark]: Boogie Preprocessor took 17.62 ms. Allocated memory is still 94.4 MB. Free memory was 57.5 MB in the beginning and 56.0 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 05:43:07,552 INFO L168 Benchmark]: RCFGBuilder took 373.01 ms. Allocated memory is still 94.4 MB. Free memory was 56.0 MB in the beginning and 49.4 MB in the end (delta: 6.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-12-09 05:43:07,552 INFO L168 Benchmark]: TraceAbstraction took 826.23 ms. Allocated memory is still 94.4 MB. Free memory was 48.9 MB in the beginning and 42.3 MB in the end (delta: 6.6 MB). Peak memory consumption was 7.7 MB. Max. memory is 16.1 GB. [2020-12-09 05:43:07,553 INFO L168 Benchmark]: Witness Printer took 60.22 ms. Allocated memory is still 94.4 MB. Free memory was 42.3 MB in the beginning and 40.3 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 05:43:07,555 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 94.4 MB. Free memory is still 71.0 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 277.54 ms. Allocated memory is still 94.4 MB. Free memory was 53.6 MB in the beginning and 59.2 MB in the end (delta: -5.6 MB). Peak memory consumption was 9.8 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 28.30 ms. Allocated memory is still 94.4 MB. Free memory was 59.2 MB in the beginning and 57.5 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 17.62 ms. Allocated memory is still 94.4 MB. Free memory was 57.5 MB in the beginning and 56.0 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 373.01 ms. Allocated memory is still 94.4 MB. Free memory was 56.0 MB in the beginning and 49.4 MB in the end (delta: 6.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 826.23 ms. Allocated memory is still 94.4 MB. Free memory was 48.9 MB in the beginning and 42.3 MB in the end (delta: 6.6 MB). Peak memory consumption was 7.7 MB. Max. memory is 16.1 GB. * Witness Printer took 60.22 ms. Allocated memory is still 94.4 MB. Free memory was 42.3 MB in the beginning and 40.3 MB in the end (delta: 2.0 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: 522]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L513] int i, j; [L514] int length = __VERIFIER_nondet_int(); [L515] COND FALSE !(length < 1 || length >= 2147483647 / sizeof(int)) [L516] int fac = __VERIFIER_nondet_int(); [L517] COND TRUE fac < 1 || fac >= 2147483647 / (sizeof(int) * length) [L517] fac = 1 [L518] int *arr = __builtin_alloca (length); [L519] int *arr2 = __builtin_alloca (fac*length); [L520] COND FALSE !(!arr || !arr2) [L521] i=0 [L521] COND TRUE i