./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength_-read.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_db7239a2-a133-4aca-b113-9589eed05515/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_db7239a2-a133-4aca-b113-9589eed05515/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_db7239a2-a133-4aca-b113-9589eed05515/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_db7239a2-a133-4aca-b113-9589eed05515/bin/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength_-read.c -s /tmp/vcloud-vcloud-master/worker/run_dir_db7239a2-a133-4aca-b113-9589eed05515/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_db7239a2-a133-4aca-b113-9589eed05515/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 aeae4642ea0f346b37f312868ec7e7128e333d20 .......................................................................................................................................................................................................................................................................................... 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-a4ecdab [2020-11-30 01:50:13,069 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-30 01:50:13,072 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-30 01:50:13,145 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-30 01:50:13,146 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-30 01:50:13,153 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-30 01:50:13,156 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-30 01:50:13,164 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-30 01:50:13,167 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-30 01:50:13,176 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-30 01:50:13,177 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-30 01:50:13,179 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-30 01:50:13,179 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-30 01:50:13,180 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-30 01:50:13,184 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-30 01:50:13,187 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-30 01:50:13,188 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-30 01:50:13,194 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-30 01:50:13,198 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-30 01:50:13,206 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-30 01:50:13,208 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-30 01:50:13,211 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-30 01:50:13,214 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-30 01:50:13,215 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-30 01:50:13,222 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-30 01:50:13,222 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-30 01:50:13,223 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-30 01:50:13,225 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-30 01:50:13,226 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-30 01:50:13,227 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-30 01:50:13,228 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-30 01:50:13,229 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-30 01:50:13,231 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-30 01:50:13,233 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-30 01:50:13,234 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-30 01:50:13,234 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-30 01:50:13,235 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-30 01:50:13,235 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-30 01:50:13,236 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-30 01:50:13,237 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-30 01:50:13,237 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-30 01:50:13,241 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_db7239a2-a133-4aca-b113-9589eed05515/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2020-11-30 01:50:13,289 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-30 01:50:13,289 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-30 01:50:13,291 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-30 01:50:13,291 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-30 01:50:13,291 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-30 01:50:13,292 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-30 01:50:13,292 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-30 01:50:13,292 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-30 01:50:13,292 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-30 01:50:13,293 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-30 01:50:13,294 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-30 01:50:13,294 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-30 01:50:13,294 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-30 01:50:13,294 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-30 01:50:13,295 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-30 01:50:13,295 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-30 01:50:13,296 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-30 01:50:13,296 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-30 01:50:13,296 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-30 01:50:13,296 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-11-30 01:50:13,297 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-30 01:50:13,297 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-30 01:50:13,297 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-30 01:50:13,297 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-11-30 01:50:13,298 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-11-30 01:50:13,298 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-11-30 01:50:13,299 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-30 01:50:13,300 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-30 01:50:13,300 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-30 01:50:13,300 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-30 01:50:13,300 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-30 01:50:13,301 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-30 01:50:13,301 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-30 01:50:13,301 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-30 01:50:13,301 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-30 01:50:13,302 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-30 01:50:13,302 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-30 01:50:13,302 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-30 01:50:13,302 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-30 01:50:13,302 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-30 01:50:13,303 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_db7239a2-a133-4aca-b113-9589eed05515/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_db7239a2-a133-4aca-b113-9589eed05515/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> aeae4642ea0f346b37f312868ec7e7128e333d20 [2020-11-30 01:50:13,602 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-30 01:50:13,660 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-30 01:50:13,664 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-30 01:50:13,666 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-30 01:50:13,667 INFO L275 PluginConnector]: CDTParser initialized [2020-11-30 01:50:13,668 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_db7239a2-a133-4aca-b113-9589eed05515/bin/utaipan/../../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength_-read.c [2020-11-30 01:50:13,772 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_db7239a2-a133-4aca-b113-9589eed05515/bin/utaipan/data/16fc4334d/afc0e80d9cf747d68f18965b3cf5422b/FLAG39e7ca6c8 [2020-11-30 01:50:14,280 INFO L306 CDTParser]: Found 1 translation units. [2020-11-30 01:50:14,281 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_db7239a2-a133-4aca-b113-9589eed05515/sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength_-read.c [2020-11-30 01:50:14,291 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_db7239a2-a133-4aca-b113-9589eed05515/bin/utaipan/data/16fc4334d/afc0e80d9cf747d68f18965b3cf5422b/FLAG39e7ca6c8 [2020-11-30 01:50:14,648 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_db7239a2-a133-4aca-b113-9589eed05515/bin/utaipan/data/16fc4334d/afc0e80d9cf747d68f18965b3cf5422b [2020-11-30 01:50:14,650 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-30 01:50:14,652 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-30 01:50:14,653 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-30 01:50:14,653 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-30 01:50:14,662 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-30 01:50:14,663 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 01:50:14" (1/1) ... [2020-11-30 01:50:14,667 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@68cefef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:50:14, skipping insertion in model container [2020-11-30 01:50:14,669 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 01:50:14" (1/1) ... [2020-11-30 01:50:14,676 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-30 01:50:14,694 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-30 01:50:14,880 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 01:50:14,909 INFO L203 MainTranslator]: Completed pre-run [2020-11-30 01:50:14,927 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 01:50:14,943 INFO L208 MainTranslator]: Completed translation [2020-11-30 01:50:14,943 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:50:14 WrapperNode [2020-11-30 01:50:14,943 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-30 01:50:14,945 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-30 01:50:14,945 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-30 01:50:14,945 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-30 01:50:14,954 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:50:14" (1/1) ... [2020-11-30 01:50:14,961 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:50:14" (1/1) ... [2020-11-30 01:50:14,980 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-30 01:50:14,981 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-30 01:50:14,982 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-30 01:50:14,982 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-30 01:50:14,990 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:50:14" (1/1) ... [2020-11-30 01:50:14,990 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:50:14" (1/1) ... [2020-11-30 01:50:14,994 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:50:14" (1/1) ... [2020-11-30 01:50:14,994 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:50:14" (1/1) ... [2020-11-30 01:50:14,999 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:50:14" (1/1) ... [2020-11-30 01:50:15,004 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:50:14" (1/1) ... [2020-11-30 01:50:15,005 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:50:14" (1/1) ... [2020-11-30 01:50:15,008 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-30 01:50:15,009 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-30 01:50:15,009 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-30 01:50:15,009 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-30 01:50:15,010 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:50:14" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_db7239a2-a133-4aca-b113-9589eed05515/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 [2020-11-30 01:50:15,085 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-30 01:50:15,085 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-30 01:50:15,085 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-30 01:50:15,085 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-30 01:50:15,085 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-30 01:50:15,086 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-30 01:50:15,613 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-30 01:50:15,613 INFO L298 CfgBuilder]: Removed 9 assume(true) statements. [2020-11-30 01:50:15,616 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 01:50:15 BoogieIcfgContainer [2020-11-30 01:50:15,616 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-30 01:50:15,618 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-30 01:50:15,618 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-30 01:50:15,623 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-30 01:50:15,623 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.11 01:50:14" (1/3) ... [2020-11-30 01:50:15,624 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a70264d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 01:50:15, skipping insertion in model container [2020-11-30 01:50:15,625 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:50:14" (2/3) ... [2020-11-30 01:50:15,625 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a70264d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 01:50:15, skipping insertion in model container [2020-11-30 01:50:15,625 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 01:50:15" (3/3) ... [2020-11-30 01:50:15,627 INFO L111 eAbstractionObserver]: Analyzing ICFG ArraysOfVariableLength_-read.c [2020-11-30 01:50:15,641 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-30 01:50:15,647 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 8 error locations. [2020-11-30 01:50:15,663 INFO L253 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2020-11-30 01:50:15,689 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-30 01:50:15,690 INFO L378 AbstractCegarLoop]: Hoare is false [2020-11-30 01:50:15,690 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-30 01:50:15,690 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-30 01:50:15,690 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-30 01:50:15,690 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-30 01:50:15,691 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-30 01:50:15,691 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-30 01:50:15,707 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2020-11-30 01:50:15,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-11-30 01:50:15,714 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:50:15,715 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-11-30 01:50:15,716 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-30 01:50:15,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:50:15,722 INFO L82 PathProgramCache]: Analyzing trace with hash 3091232, now seen corresponding path program 1 times [2020-11-30 01:50:15,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 01:50:15,733 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754709483] [2020-11-30 01:50:15,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:50:15,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:50:15,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:50:15,891 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754709483] [2020-11-30 01:50:15,892 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 01:50:15,892 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-30 01:50:15,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013408181] [2020-11-30 01:50:15,902 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-30 01:50:15,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 01:50:15,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-30 01:50:15,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 01:50:15,927 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 3 states. [2020-11-30 01:50:16,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:50:16,023 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2020-11-30 01:50:16,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-30 01:50:16,026 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-11-30 01:50:16,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:50:16,038 INFO L225 Difference]: With dead ends: 29 [2020-11-30 01:50:16,039 INFO L226 Difference]: Without dead ends: 28 [2020-11-30 01:50:16,043 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 01:50:16,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-11-30 01:50:16,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 19. [2020-11-30 01:50:16,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-11-30 01:50:16,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2020-11-30 01:50:16,100 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 4 [2020-11-30 01:50:16,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:50:16,101 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2020-11-30 01:50:16,101 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-30 01:50:16,101 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2020-11-30 01:50:16,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-11-30 01:50:16,102 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:50:16,102 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-11-30 01:50:16,103 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-30 01:50:16,103 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-30 01:50:16,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:50:16,108 INFO L82 PathProgramCache]: Analyzing trace with hash 3019078, now seen corresponding path program 1 times [2020-11-30 01:50:16,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 01:50:16,110 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507395144] [2020-11-30 01:50:16,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:50:16,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 01:50:16,143 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 01:50:16,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 01:50:16,183 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 01:50:16,214 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2020-11-30 01:50:16,215 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-30 01:50:16,219 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-30 01:50:16,247 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.11 01:50:16 BoogieIcfgContainer [2020-11-30 01:50:16,247 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-30 01:50:16,248 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-30 01:50:16,248 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-30 01:50:16,249 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-30 01:50:16,249 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 01:50:15" (3/4) ... [2020-11-30 01:50:16,251 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-30 01:50:16,301 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_db7239a2-a133-4aca-b113-9589eed05515/bin/utaipan/witness.graphml [2020-11-30 01:50:16,302 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-30 01:50:16,306 INFO L168 Benchmark]: Toolchain (without parser) took 1651.28 ms. Allocated memory was 77.6 MB in the beginning and 94.4 MB in the end (delta: 16.8 MB). Free memory was 45.6 MB in the beginning and 67.9 MB in the end (delta: -22.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 01:50:16,307 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 77.6 MB. Free memory was 51.7 MB in the beginning and 51.6 MB in the end (delta: 30.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 01:50:16,314 INFO L168 Benchmark]: CACSL2BoogieTranslator took 290.68 ms. Allocated memory was 77.6 MB in the beginning and 94.4 MB in the end (delta: 16.8 MB). Free memory was 45.4 MB in the beginning and 73.1 MB in the end (delta: -27.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-30 01:50:16,315 INFO L168 Benchmark]: Boogie Procedure Inliner took 36.03 ms. Allocated memory is still 94.4 MB. Free memory was 73.1 MB in the beginning and 71.8 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 01:50:16,317 INFO L168 Benchmark]: Boogie Preprocessor took 26.47 ms. Allocated memory is still 94.4 MB. Free memory was 71.8 MB in the beginning and 70.6 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-30 01:50:16,318 INFO L168 Benchmark]: RCFGBuilder took 607.72 ms. Allocated memory is still 94.4 MB. Free memory was 70.6 MB in the beginning and 49.6 MB in the end (delta: 21.0 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. [2020-11-30 01:50:16,318 INFO L168 Benchmark]: TraceAbstraction took 629.28 ms. Allocated memory is still 94.4 MB. Free memory was 49.6 MB in the beginning and 70.0 MB in the end (delta: -20.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 01:50:16,322 INFO L168 Benchmark]: Witness Printer took 53.99 ms. Allocated memory is still 94.4 MB. Free memory was 70.0 MB in the beginning and 67.9 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-30 01:50:16,329 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30 ms. Allocated memory is still 77.6 MB. Free memory was 51.7 MB in the beginning and 51.6 MB in the end (delta: 30.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 290.68 ms. Allocated memory was 77.6 MB in the beginning and 94.4 MB in the end (delta: 16.8 MB). Free memory was 45.4 MB in the beginning and 73.1 MB in the end (delta: -27.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 36.03 ms. Allocated memory is still 94.4 MB. Free memory was 73.1 MB in the beginning and 71.8 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 26.47 ms. Allocated memory is still 94.4 MB. Free memory was 71.8 MB in the beginning and 70.6 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 607.72 ms. Allocated memory is still 94.4 MB. Free memory was 70.6 MB in the beginning and 49.6 MB in the end (delta: 21.0 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. * TraceAbstraction took 629.28 ms. Allocated memory is still 94.4 MB. Free memory was 49.6 MB in the beginning and 70.0 MB in the end (delta: -20.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 53.99 ms. Allocated memory is still 94.4 MB. Free memory was 70.0 MB in the beginning and 67.9 MB in the end (delta: 2.1 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: 15]: array index can be out of bounds array index can be out of bounds We found a FailurePath: [L21] int i, b[100]; [L22] i = 0 [L22] COND TRUE i < 100 [L13] int a[n], i; [L14] i = 0 [L14] COND TRUE i < size + 1 [L15] a[i] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 19 locations, 8 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.5s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 13 SDtfs, 18 SDslu, 8 SDs, 0 SdLazy, 11 SolverSat, 2 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=19occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 9 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 8 NumberOfCodeBlocks, 8 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 3 ConstructedInterpolants, 0 QuantifiedInterpolants, 15 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...