./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/loops/invert_string-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version a0165632 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_741c66d5-aced-408c-82e1-f64d9a7f424c/bin/utaipan-verify-YMUCfTKeje/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_741c66d5-aced-408c-82e1-f64d9a7f424c/bin/utaipan-verify-YMUCfTKeje/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_741c66d5-aced-408c-82e1-f64d9a7f424c/bin/utaipan-verify-YMUCfTKeje/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_741c66d5-aced-408c-82e1-f64d9a7f424c/bin/utaipan-verify-YMUCfTKeje/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/loops/invert_string-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_741c66d5-aced-408c-82e1-f64d9a7f424c/bin/utaipan-verify-YMUCfTKeje/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_741c66d5-aced-408c-82e1-f64d9a7f424c/bin/utaipan-verify-YMUCfTKeje --witnessprinter.witness.filename witness --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 e33cb4ee211d41e701c41ff91ce60e23f49ca2926f74469a82378a4395cc8259 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-a016563 [2024-11-09 05:06:51,500 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-09 05:06:51,597 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_741c66d5-aced-408c-82e1-f64d9a7f424c/bin/utaipan-verify-YMUCfTKeje/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2024-11-09 05:06:51,605 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-09 05:06:51,606 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-09 05:06:51,644 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-09 05:06:51,646 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-09 05:06:51,647 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-09 05:06:51,648 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-09 05:06:51,649 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-09 05:06:51,650 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-09 05:06:51,651 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-09 05:06:51,651 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-09 05:06:51,651 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-09 05:06:51,652 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-09 05:06:51,652 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-09 05:06:51,653 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-09 05:06:51,656 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-09 05:06:51,656 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-09 05:06:51,657 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-09 05:06:51,657 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-09 05:06:51,658 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-09 05:06:51,659 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-09 05:06:51,659 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-09 05:06:51,660 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-09 05:06:51,660 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-09 05:06:51,660 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-09 05:06:51,661 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-09 05:06:51,661 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-09 05:06:51,662 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-09 05:06:51,666 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-09 05:06:51,667 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-09 05:06:51,668 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-09 05:06:51,669 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-09 05:06:51,669 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-09 05:06:51,669 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-09 05:06:51,670 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-09 05:06:51,670 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-09 05:06:51,670 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-09 05:06:51,671 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-09 05:06:51,671 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-09 05:06:51,672 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 05:06:51,672 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-09 05:06:51,672 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-09 05:06:51,673 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-09 05:06:51,674 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-09 05:06:51,674 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-09 05:06:51,674 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-09 05:06:51,675 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-09 05:06:51,675 INFO L153 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_worker_vcloud-master_on_vcloud-master/run_dir_741c66d5-aced-408c-82e1-f64d9a7f424c/bin/utaipan-verify-YMUCfTKeje/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_741c66d5-aced-408c-82e1-f64d9a7f424c/bin/utaipan-verify-YMUCfTKeje Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e33cb4ee211d41e701c41ff91ce60e23f49ca2926f74469a82378a4395cc8259 [2024-11-09 05:06:51,963 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-09 05:06:52,000 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-09 05:06:52,003 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-09 05:06:52,004 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-09 05:06:52,004 INFO L274 PluginConnector]: CDTParser initialized [2024-11-09 05:06:52,006 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_741c66d5-aced-408c-82e1-f64d9a7f424c/bin/utaipan-verify-YMUCfTKeje/../../sv-benchmarks/c/loops/invert_string-2.c Unable to find full path for "g++" [2024-11-09 05:06:54,110 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-09 05:06:54,288 INFO L384 CDTParser]: Found 1 translation units. [2024-11-09 05:06:54,289 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_741c66d5-aced-408c-82e1-f64d9a7f424c/sv-benchmarks/c/loops/invert_string-2.c [2024-11-09 05:06:54,296 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_741c66d5-aced-408c-82e1-f64d9a7f424c/bin/utaipan-verify-YMUCfTKeje/data/e7e32f4d7/2f1d92dd8d2f4d6990fd4deeade0986a/FLAG509a96de6 [2024-11-09 05:06:54,310 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_741c66d5-aced-408c-82e1-f64d9a7f424c/bin/utaipan-verify-YMUCfTKeje/data/e7e32f4d7/2f1d92dd8d2f4d6990fd4deeade0986a [2024-11-09 05:06:54,313 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-09 05:06:54,315 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-09 05:06:54,316 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-09 05:06:54,317 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-09 05:06:54,322 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-09 05:06:54,323 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 05:06:54" (1/1) ... [2024-11-09 05:06:54,324 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@351525bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:06:54, skipping insertion in model container [2024-11-09 05:06:54,325 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 05:06:54" (1/1) ... [2024-11-09 05:06:54,344 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-09 05:06:54,530 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 05:06:54,538 INFO L200 MainTranslator]: Completed pre-run [2024-11-09 05:06:54,556 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 05:06:54,574 INFO L204 MainTranslator]: Completed translation [2024-11-09 05:06:54,574 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:06:54 WrapperNode [2024-11-09 05:06:54,574 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-09 05:06:54,575 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-09 05:06:54,576 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-09 05:06:54,576 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-09 05:06:54,584 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:06:54" (1/1) ... [2024-11-09 05:06:54,593 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:06:54" (1/1) ... [2024-11-09 05:06:54,612 INFO L138 Inliner]: procedures = 15, calls = 19, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 71 [2024-11-09 05:06:54,612 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-09 05:06:54,613 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-09 05:06:54,613 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-09 05:06:54,613 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-09 05:06:54,622 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:06:54" (1/1) ... [2024-11-09 05:06:54,622 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:06:54" (1/1) ... [2024-11-09 05:06:54,625 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:06:54" (1/1) ... [2024-11-09 05:06:54,625 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:06:54" (1/1) ... [2024-11-09 05:06:54,630 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:06:54" (1/1) ... [2024-11-09 05:06:54,634 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:06:54" (1/1) ... [2024-11-09 05:06:54,635 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:06:54" (1/1) ... [2024-11-09 05:06:54,636 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:06:54" (1/1) ... [2024-11-09 05:06:54,637 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-09 05:06:54,638 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-09 05:06:54,638 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-09 05:06:54,639 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-09 05:06:54,639 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:06:54" (1/1) ... [2024-11-09 05:06:54,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 05:06:54,660 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_741c66d5-aced-408c-82e1-f64d9a7f424c/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:06:54,674 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_741c66d5-aced-408c-82e1-f64d9a7f424c/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-09 05:06:54,681 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_741c66d5-aced-408c-82e1-f64d9a7f424c/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-09 05:06:54,711 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-09 05:06:54,712 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-09 05:06:54,712 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-09 05:06:54,712 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2024-11-09 05:06:54,712 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-09 05:06:54,714 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-09 05:06:54,714 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2024-11-09 05:06:54,715 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-09 05:06:54,794 INFO L238 CfgBuilder]: Building ICFG [2024-11-09 05:06:54,797 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-09 05:06:55,013 INFO L? ?]: Removed 43 outVars from TransFormulas that were not future-live. [2024-11-09 05:06:55,013 INFO L287 CfgBuilder]: Performing block encoding [2024-11-09 05:06:55,070 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-09 05:06:55,070 INFO L316 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-09 05:06:55,071 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 05:06:55 BoogieIcfgContainer [2024-11-09 05:06:55,071 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-09 05:06:55,074 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-09 05:06:55,074 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-09 05:06:55,078 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-09 05:06:55,078 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 05:06:54" (1/3) ... [2024-11-09 05:06:55,079 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ad7b119 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 05:06:55, skipping insertion in model container [2024-11-09 05:06:55,079 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:06:54" (2/3) ... [2024-11-09 05:06:55,080 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ad7b119 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 05:06:55, skipping insertion in model container [2024-11-09 05:06:55,080 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 05:06:55" (3/3) ... [2024-11-09 05:06:55,081 INFO L112 eAbstractionObserver]: Analyzing ICFG invert_string-2.c [2024-11-09 05:06:55,129 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-09 05:06:55,130 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 14 error locations. [2024-11-09 05:06:55,188 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 05:06:55,195 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=None, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@7db6f450, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 05:06:55,195 INFO L334 AbstractCegarLoop]: Starting to check reachability of 14 error locations. [2024-11-09 05:06:55,200 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 33 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:06:55,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2024-11-09 05:06:55,205 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:06:55,206 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1] [2024-11-09 05:06:55,207 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-09 05:06:55,212 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:06:55,212 INFO L85 PathProgramCache]: Analyzing trace with hash 111062, now seen corresponding path program 1 times [2024-11-09 05:06:55,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:06:55,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14441022] [2024-11-09 05:06:55,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:06:55,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:06:55,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:06:55,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:06:55,608 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:06:55,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14441022] [2024-11-09 05:06:55,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14441022] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:06:55,609 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 05:06:55,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-09 05:06:55,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500008088] [2024-11-09 05:06:55,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:06:55,618 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 05:06:55,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:06:55,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 05:06:55,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 05:06:55,653 INFO L87 Difference]: Start difference. First operand has 34 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 33 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:06:55,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:06:55,719 INFO L93 Difference]: Finished difference Result 30 states and 35 transitions. [2024-11-09 05:06:55,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 05:06:55,722 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2024-11-09 05:06:55,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:06:55,730 INFO L225 Difference]: With dead ends: 30 [2024-11-09 05:06:55,731 INFO L226 Difference]: Without dead ends: 29 [2024-11-09 05:06:55,732 INFO L431 NwaCegarLoop]: 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 [2024-11-09 05:06:55,738 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 26 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 05:06:55,739 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 19 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 05:06:55,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2024-11-09 05:06:55,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2024-11-09 05:06:55,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 28 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:06:55,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2024-11-09 05:06:55,782 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 3 [2024-11-09 05:06:55,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:06:55,783 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2024-11-09 05:06:55,783 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:06:55,783 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2024-11-09 05:06:55,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2024-11-09 05:06:55,785 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:06:55,785 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1] [2024-11-09 05:06:55,786 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-09 05:06:55,787 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-09 05:06:55,789 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:06:55,789 INFO L85 PathProgramCache]: Analyzing trace with hash 111063, now seen corresponding path program 1 times [2024-11-09 05:06:55,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:06:55,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124001097] [2024-11-09 05:06:55,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:06:55,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:06:55,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-09 05:06:55,845 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-09 05:06:55,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-09 05:06:55,891 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2024-11-09 05:06:55,891 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-09 05:06:55,893 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 14 remaining) [2024-11-09 05:06:55,896 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 14 remaining) [2024-11-09 05:06:55,896 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 14 remaining) [2024-11-09 05:06:55,897 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 14 remaining) [2024-11-09 05:06:55,897 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 14 remaining) [2024-11-09 05:06:55,897 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 14 remaining) [2024-11-09 05:06:55,898 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 14 remaining) [2024-11-09 05:06:55,898 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 14 remaining) [2024-11-09 05:06:55,898 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 14 remaining) [2024-11-09 05:06:55,899 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 14 remaining) [2024-11-09 05:06:55,899 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 14 remaining) [2024-11-09 05:06:55,899 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 14 remaining) [2024-11-09 05:06:55,903 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK (1 of 14 remaining) [2024-11-09 05:06:55,903 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_LEAK (0 of 14 remaining) [2024-11-09 05:06:55,904 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-09 05:06:55,908 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1] [2024-11-09 05:06:55,931 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2024-11-09 05:06:55,938 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.11 05:06:55 BoogieIcfgContainer [2024-11-09 05:06:55,938 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-11-09 05:06:55,939 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-11-09 05:06:55,939 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-11-09 05:06:55,939 INFO L274 PluginConnector]: Witness Printer initialized [2024-11-09 05:06:55,940 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 05:06:55" (3/4) ... [2024-11-09 05:06:55,942 INFO L136 WitnessPrinter]: Generating witness for reachability counterexample [2024-11-09 05:06:55,989 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_741c66d5-aced-408c-82e1-f64d9a7f424c/bin/utaipan-verify-YMUCfTKeje/witness.graphml [2024-11-09 05:06:55,989 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-11-09 05:06:55,992 INFO L158 Benchmark]: Toolchain (without parser) took 1675.15ms. Allocated memory was 134.2MB in the beginning and 169.9MB in the end (delta: 35.7MB). Free memory was 96.9MB in the beginning and 107.3MB in the end (delta: -10.4MB). Peak memory consumption was 26.1MB. Max. memory is 16.1GB. [2024-11-09 05:06:55,994 INFO L158 Benchmark]: CDTParser took 0.25ms. Allocated memory is still 134.2MB. Free memory is still 81.2MB. There was no memory consumed. Max. memory is 16.1GB. [2024-11-09 05:06:55,995 INFO L158 Benchmark]: CACSL2BoogieTranslator took 258.48ms. Allocated memory is still 134.2MB. Free memory was 96.9MB in the beginning and 84.3MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2024-11-09 05:06:55,995 INFO L158 Benchmark]: Boogie Procedure Inliner took 36.91ms. Allocated memory is still 134.2MB. Free memory was 84.3MB in the beginning and 82.7MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-09 05:06:55,996 INFO L158 Benchmark]: Boogie Preprocessor took 24.74ms. Allocated memory is still 134.2MB. Free memory was 82.7MB in the beginning and 81.4MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-11-09 05:06:55,996 INFO L158 Benchmark]: RCFGBuilder took 432.99ms. Allocated memory is still 134.2MB. Free memory was 81.4MB in the beginning and 65.5MB in the end (delta: 16.0MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2024-11-09 05:06:55,997 INFO L158 Benchmark]: TraceAbstraction took 864.14ms. Allocated memory was 134.2MB in the beginning and 169.9MB in the end (delta: 35.7MB). Free memory was 64.7MB in the beginning and 109.4MB in the end (delta: -44.7MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-09 05:06:56,001 INFO L158 Benchmark]: Witness Printer took 50.57ms. Allocated memory is still 169.9MB. Free memory was 109.4MB in the beginning and 107.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-11-09 05:06:56,004 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25ms. Allocated memory is still 134.2MB. Free memory is still 81.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 258.48ms. Allocated memory is still 134.2MB. Free memory was 96.9MB in the beginning and 84.3MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 36.91ms. Allocated memory is still 134.2MB. Free memory was 84.3MB in the beginning and 82.7MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 24.74ms. Allocated memory is still 134.2MB. Free memory was 82.7MB in the beginning and 81.4MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 432.99ms. Allocated memory is still 134.2MB. Free memory was 81.4MB in the beginning and 65.5MB in the end (delta: 16.0MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * TraceAbstraction took 864.14ms. Allocated memory was 134.2MB in the beginning and 169.9MB in the end (delta: 35.7MB). Free memory was 64.7MB in the beginning and 109.4MB in the end (delta: -44.7MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 50.57ms. Allocated memory is still 169.9MB. Free memory was 109.4MB in the beginning and 107.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: -1]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L15] int MAX = __VERIFIER_nondet_uint(); [L16] char str1[MAX], str2[MAX]; [L17] int cont, i, j; [L18] cont = 0 [L20] i=0 VAL [MAX=-1, i=0, str1={4:0}, str2={5:0}] [L20] COND TRUE i