./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/add_last_unsafe.i --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_bc081fda-f825-4962-91cf-2341337a0406/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_bc081fda-f825-4962-91cf-2341337a0406/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_bc081fda-f825-4962-91cf-2341337a0406/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_bc081fda-f825-4962-91cf-2341337a0406/bin/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/add_last_unsafe.i -s /tmp/vcloud-vcloud-master/worker/run_dir_bc081fda-f825-4962-91cf-2341337a0406/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_bc081fda-f825-4962-91cf-2341337a0406/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 6dcea98e309b9ccb2c2dc4a4f9353c6c61175172 .................................................................................................................................................................................................................................................................................................................................. 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 01:50:49,147 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-30 01:50:49,151 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-30 01:50:49,241 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-30 01:50:49,242 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-30 01:50:49,244 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-30 01:50:49,246 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-30 01:50:49,251 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-30 01:50:49,254 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-30 01:50:49,256 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-30 01:50:49,257 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-30 01:50:49,259 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-30 01:50:49,260 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-30 01:50:49,262 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-30 01:50:49,264 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-30 01:50:49,266 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-30 01:50:49,267 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-30 01:50:49,269 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-30 01:50:49,272 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-30 01:50:49,276 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-30 01:50:49,278 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-30 01:50:49,280 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-30 01:50:49,282 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-30 01:50:49,284 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-30 01:50:49,289 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-30 01:50:49,289 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-30 01:50:49,290 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-30 01:50:49,291 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-30 01:50:49,292 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-30 01:50:49,294 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-30 01:50:49,294 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-30 01:50:49,295 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-30 01:50:49,297 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-30 01:50:49,298 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-30 01:50:49,300 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-30 01:50:49,301 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-30 01:50:49,302 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-30 01:50:49,302 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-30 01:50:49,302 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-30 01:50:49,304 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-30 01:50:49,305 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-30 01:50:49,306 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_bc081fda-f825-4962-91cf-2341337a0406/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2020-11-30 01:50:49,337 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-30 01:50:49,337 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-30 01:50:49,339 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-30 01:50:49,339 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-30 01:50:49,339 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-30 01:50:49,339 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-30 01:50:49,340 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-30 01:50:49,340 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-30 01:50:49,340 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-30 01:50:49,341 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-30 01:50:49,341 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-30 01:50:49,341 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-30 01:50:49,342 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-30 01:50:49,342 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-30 01:50:49,342 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-30 01:50:49,343 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-30 01:50:49,344 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-30 01:50:49,344 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-30 01:50:49,344 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-30 01:50:49,345 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-11-30 01:50:49,345 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-30 01:50:49,345 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-30 01:50:49,346 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-30 01:50:49,346 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-11-30 01:50:49,346 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-11-30 01:50:49,347 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-11-30 01:50:49,347 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-30 01:50:49,347 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-30 01:50:49,348 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-30 01:50:49,348 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-30 01:50:49,348 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-30 01:50:49,349 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-30 01:50:49,349 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-30 01:50:49,349 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-30 01:50:49,349 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-30 01:50:49,350 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-30 01:50:49,350 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-30 01:50:49,350 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-30 01:50:49,351 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-30 01:50:49,351 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-30 01:50:49,351 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_bc081fda-f825-4962-91cf-2341337a0406/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_bc081fda-f825-4962-91cf-2341337a0406/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6dcea98e309b9ccb2c2dc4a4f9353c6c61175172 [2020-11-30 01:50:49,668 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-30 01:50:49,725 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-30 01:50:49,729 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-30 01:50:49,730 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-30 01:50:49,731 INFO L275 PluginConnector]: CDTParser initialized [2020-11-30 01:50:49,732 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_bc081fda-f825-4962-91cf-2341337a0406/bin/utaipan/../../sv-benchmarks/c/array-memsafety/add_last_unsafe.i [2020-11-30 01:50:49,834 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_bc081fda-f825-4962-91cf-2341337a0406/bin/utaipan/data/a1611eea4/6062cb0465854e23b706a8802c6ef116/FLAG3ee5e87ad [2020-11-30 01:50:50,533 INFO L306 CDTParser]: Found 1 translation units. [2020-11-30 01:50:50,534 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_bc081fda-f825-4962-91cf-2341337a0406/sv-benchmarks/c/array-memsafety/add_last_unsafe.i [2020-11-30 01:50:50,552 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_bc081fda-f825-4962-91cf-2341337a0406/bin/utaipan/data/a1611eea4/6062cb0465854e23b706a8802c6ef116/FLAG3ee5e87ad [2020-11-30 01:50:50,843 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_bc081fda-f825-4962-91cf-2341337a0406/bin/utaipan/data/a1611eea4/6062cb0465854e23b706a8802c6ef116 [2020-11-30 01:50:50,846 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-30 01:50:50,848 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-30 01:50:50,850 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-30 01:50:50,850 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-30 01:50:50,859 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-30 01:50:50,863 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 01:50:50" (1/1) ... [2020-11-30 01:50:50,867 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4d5a3eaf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:50:50, skipping insertion in model container [2020-11-30 01:50:50,868 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 01:50:50" (1/1) ... [2020-11-30 01:50:50,877 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-30 01:50:50,948 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-30 01:50:51,443 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 01:50:51,453 INFO L203 MainTranslator]: Completed pre-run [2020-11-30 01:50:51,497 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 01:50:51,557 INFO L208 MainTranslator]: Completed translation [2020-11-30 01:50:51,557 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:50:51 WrapperNode [2020-11-30 01:50:51,558 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-30 01:50:51,559 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-30 01:50:51,559 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-30 01:50:51,559 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-30 01:50:51,568 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:50:51" (1/1) ... [2020-11-30 01:50:51,583 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:50:51" (1/1) ... [2020-11-30 01:50:51,606 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-30 01:50:51,607 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-30 01:50:51,608 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-30 01:50:51,608 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-30 01:50:51,618 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:50:51" (1/1) ... [2020-11-30 01:50:51,618 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:50:51" (1/1) ... [2020-11-30 01:50:51,622 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:50:51" (1/1) ... [2020-11-30 01:50:51,622 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:50:51" (1/1) ... [2020-11-30 01:50:51,628 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:50:51" (1/1) ... [2020-11-30 01:50:51,633 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:50:51" (1/1) ... [2020-11-30 01:50:51,635 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:50:51" (1/1) ... [2020-11-30 01:50:51,637 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-30 01:50:51,638 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-30 01:50:51,638 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-30 01:50:51,639 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-30 01:50:51,640 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:50:51" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bc081fda-f825-4962-91cf-2341337a0406/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 01:50:51,750 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-30 01:50:51,750 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-30 01:50:51,750 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-30 01:50:51,751 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-30 01:50:51,751 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-30 01:50:51,751 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-30 01:50:52,359 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-30 01:50:52,360 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-11-30 01:50:52,362 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 01:50:52 BoogieIcfgContainer [2020-11-30 01:50:52,362 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-30 01:50:52,364 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-30 01:50:52,364 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-30 01:50:52,368 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-30 01:50:52,369 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.11 01:50:50" (1/3) ... [2020-11-30 01:50:52,369 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ada2f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 01:50:52, skipping insertion in model container [2020-11-30 01:50:52,370 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:50:51" (2/3) ... [2020-11-30 01:50:52,370 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ada2f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 01:50:52, skipping insertion in model container [2020-11-30 01:50:52,370 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 01:50:52" (3/3) ... [2020-11-30 01:50:52,372 INFO L111 eAbstractionObserver]: Analyzing ICFG add_last_unsafe.i [2020-11-30 01:50:52,384 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-30 01:50:52,389 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 13 error locations. [2020-11-30 01:50:52,403 INFO L253 AbstractCegarLoop]: Starting to check reachability of 13 error locations. [2020-11-30 01:50:52,436 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-30 01:50:52,436 INFO L378 AbstractCegarLoop]: Hoare is false [2020-11-30 01:50:52,436 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-30 01:50:52,437 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-30 01:50:52,437 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-30 01:50:52,437 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-30 01:50:52,437 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-30 01:50:52,437 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-30 01:50:52,453 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2020-11-30 01:50:52,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-11-30 01:50:52,460 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:50:52,461 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-11-30 01:50:52,461 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-11-30 01:50:52,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:50:52,468 INFO L82 PathProgramCache]: Analyzing trace with hash 98455, now seen corresponding path program 1 times [2020-11-30 01:50:52,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 01:50:52,480 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224866193] [2020-11-30 01:50:52,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:50:52,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:50:52,667 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 01:50:52,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224866193] [2020-11-30 01:50:52,671 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 01:50:52,671 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-30 01:50:52,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549181428] [2020-11-30 01:50:52,677 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-30 01:50:52,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 01:50:52,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-30 01:50:52,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 01:50:52,702 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 3 states. [2020-11-30 01:50:52,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:50:52,767 INFO L93 Difference]: Finished difference Result 26 states and 27 transitions. [2020-11-30 01:50:52,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-30 01:50:52,770 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2020-11-30 01:50:52,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:50:52,783 INFO L225 Difference]: With dead ends: 26 [2020-11-30 01:50:52,784 INFO L226 Difference]: Without dead ends: 25 [2020-11-30 01:50:52,787 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 01:50:52,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-11-30 01:50:52,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-11-30 01:50:52,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-11-30 01:50:52,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2020-11-30 01:50:52,835 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 3 [2020-11-30 01:50:52,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:50:52,835 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2020-11-30 01:50:52,835 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-30 01:50:52,836 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2020-11-30 01:50:52,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-11-30 01:50:52,836 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:50:52,836 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-11-30 01:50:52,837 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-30 01:50:52,837 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-11-30 01:50:52,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:50:52,838 INFO L82 PathProgramCache]: Analyzing trace with hash 3052842, now seen corresponding path program 1 times [2020-11-30 01:50:52,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 01:50:52,839 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691710645] [2020-11-30 01:50:52,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:50:52,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:50:52,893 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 01:50:52,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691710645] [2020-11-30 01:50:52,894 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 01:50:52,894 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-11-30 01:50:52,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415017266] [2020-11-30 01:50:52,896 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-30 01:50:52,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 01:50:52,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-30 01:50:52,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 01:50:52,898 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 3 states. [2020-11-30 01:50:52,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:50:52,965 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2020-11-30 01:50:52,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-30 01:50:52,965 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-11-30 01:50:52,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:50:52,966 INFO L225 Difference]: With dead ends: 22 [2020-11-30 01:50:52,966 INFO L226 Difference]: Without dead ends: 22 [2020-11-30 01:50:52,967 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 01:50:52,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-11-30 01:50:52,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-11-30 01:50:52,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-11-30 01:50:52,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2020-11-30 01:50:52,971 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 4 [2020-11-30 01:50:52,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:50:52,971 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2020-11-30 01:50:52,971 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-30 01:50:52,972 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2020-11-30 01:50:52,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-11-30 01:50:52,972 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:50:52,972 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-11-30 01:50:52,972 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-30 01:50:52,973 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-11-30 01:50:52,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:50:52,973 INFO L82 PathProgramCache]: Analyzing trace with hash 3052843, now seen corresponding path program 1 times [2020-11-30 01:50:52,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 01:50:52,974 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465250668] [2020-11-30 01:50:52,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:50:53,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 01:50:53,023 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 01:50:53,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 01:50:53,050 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 01:50:53,082 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2020-11-30 01:50:53,083 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-30 01:50:53,083 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-30 01:50:53,103 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.11 01:50:53 BoogieIcfgContainer [2020-11-30 01:50:53,103 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-30 01:50:53,104 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-30 01:50:53,104 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-30 01:50:53,104 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-30 01:50:53,106 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 01:50:52" (3/4) ... [2020-11-30 01:50:53,109 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-30 01:50:53,155 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_bc081fda-f825-4962-91cf-2341337a0406/bin/utaipan/witness.graphml [2020-11-30 01:50:53,155 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-30 01:50:53,158 INFO L168 Benchmark]: Toolchain (without parser) took 2308.61 ms. Allocated memory was 94.4 MB in the beginning and 113.2 MB in the end (delta: 18.9 MB). Free memory was 63.2 MB in the beginning and 63.6 MB in the end (delta: -390.4 kB). Peak memory consumption was 18.2 MB. Max. memory is 16.1 GB. [2020-11-30 01:50:53,164 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 94.4 MB. Free memory was 50.4 MB in the beginning and 50.3 MB in the end (delta: 63.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 01:50:53,165 INFO L168 Benchmark]: CACSL2BoogieTranslator took 708.11 ms. Allocated memory is still 94.4 MB. Free memory was 63.0 MB in the beginning and 61.5 MB in the end (delta: 1.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-30 01:50:53,166 INFO L168 Benchmark]: Boogie Procedure Inliner took 47.73 ms. Allocated memory is still 94.4 MB. Free memory was 61.5 MB in the beginning and 59.9 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-30 01:50:53,166 INFO L168 Benchmark]: Boogie Preprocessor took 30.07 ms. Allocated memory is still 94.4 MB. Free memory was 59.9 MB in the beginning and 58.5 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 01:50:53,167 INFO L168 Benchmark]: RCFGBuilder took 724.28 ms. Allocated memory is still 94.4 MB. Free memory was 58.5 MB in the beginning and 36.0 MB in the end (delta: 22.5 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. [2020-11-30 01:50:53,168 INFO L168 Benchmark]: TraceAbstraction took 739.33 ms. Allocated memory was 94.4 MB in the beginning and 113.2 MB in the end (delta: 18.9 MB). Free memory was 35.5 MB in the beginning and 65.7 MB in the end (delta: -30.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 01:50:53,169 INFO L168 Benchmark]: Witness Printer took 51.29 ms. Allocated memory is still 113.2 MB. Free memory was 65.7 MB in the beginning and 63.6 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-30 01:50:53,173 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 94.4 MB. Free memory was 50.4 MB in the beginning and 50.3 MB in the end (delta: 63.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 708.11 ms. Allocated memory is still 94.4 MB. Free memory was 63.0 MB in the beginning and 61.5 MB in the end (delta: 1.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 47.73 ms. Allocated memory is still 94.4 MB. Free memory was 61.5 MB in the beginning and 59.9 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 30.07 ms. Allocated memory is still 94.4 MB. Free memory was 59.9 MB in the beginning and 58.5 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 724.28 ms. Allocated memory is still 94.4 MB. Free memory was 58.5 MB in the beginning and 36.0 MB in the end (delta: 22.5 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. * TraceAbstraction took 739.33 ms. Allocated memory was 94.4 MB in the beginning and 113.2 MB in the end (delta: 18.9 MB). Free memory was 35.5 MB in the beginning and 65.7 MB in the end (delta: -30.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 51.29 ms. Allocated memory is still 113.2 MB. Free memory was 65.7 MB in the beginning and 63.6 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: 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) [L516] int *arr = __builtin_alloca (length); [L517] COND FALSE !(!arr) [L518] int *a = arr; [L520] int k = 0; [L520] COND TRUE k < length [L522] arr[k] = __VERIFIER_nondet_int() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 26 locations, 13 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.6s, OverallIterations: 3, TraceHistogramMax: 1, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 26 SDtfs, 44 SDslu, 0 SDs, 0 SdLazy, 26 SolverSat, 2 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=26occurred 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, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 11 NumberOfCodeBlocks, 11 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 5 ConstructedInterpolants, 0 QuantifiedInterpolants, 55 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 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...