./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/memsafety-ext3/scopes4-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version f470102c Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx12G -Xms1G -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/memsafety-ext3/scopes4-2.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --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 Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 25981771a012eec333f97d8302486eae22970d9e ........................................................................................................................................................................................................................................................................................................................ 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 0.1.25-f470102 [2019-11-28 20:19:14,135 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-28 20:19:14,137 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-28 20:19:14,150 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-28 20:19:14,151 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-28 20:19:14,152 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-28 20:19:14,153 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-28 20:19:14,156 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-28 20:19:14,158 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-28 20:19:14,159 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-28 20:19:14,160 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-28 20:19:14,161 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-28 20:19:14,161 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-28 20:19:14,163 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-28 20:19:14,164 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-28 20:19:14,165 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-28 20:19:14,166 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-28 20:19:14,167 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-28 20:19:14,169 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-28 20:19:14,175 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-28 20:19:14,177 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-28 20:19:14,180 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-28 20:19:14,183 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-28 20:19:14,184 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-28 20:19:14,188 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-28 20:19:14,189 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-28 20:19:14,189 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-28 20:19:14,191 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-28 20:19:14,192 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-28 20:19:14,193 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-28 20:19:14,195 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-28 20:19:14,196 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-28 20:19:14,197 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-28 20:19:14,198 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-28 20:19:14,200 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-28 20:19:14,201 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-28 20:19:14,202 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-28 20:19:14,203 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-28 20:19:14,203 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-28 20:19:14,205 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-28 20:19:14,207 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-28 20:19:14,208 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2019-11-28 20:19:14,230 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-28 20:19:14,231 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-28 20:19:14,232 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-28 20:19:14,232 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-28 20:19:14,232 INFO L138 SettingsManager]: * Use SBE=true [2019-11-28 20:19:14,233 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-28 20:19:14,233 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-28 20:19:14,233 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-11-28 20:19:14,233 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-28 20:19:14,234 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-28 20:19:14,234 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-28 20:19:14,234 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2019-11-28 20:19:14,235 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2019-11-28 20:19:14,236 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2019-11-28 20:19:14,236 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-28 20:19:14,237 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-28 20:19:14,237 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-28 20:19:14,237 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-28 20:19:14,237 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-28 20:19:14,238 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-28 20:19:14,238 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-28 20:19:14,239 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-28 20:19:14,239 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-28 20:19:14,239 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-28 20:19:14,239 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-28 20:19:14,240 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-28 20:19:14,240 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-28 20:19:14,240 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-11-28 20:19:14,240 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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 -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux 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 -> Automizer 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 -> 25981771a012eec333f97d8302486eae22970d9e [2019-11-28 20:19:14,620 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-28 20:19:14,636 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-28 20:19:14,641 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-28 20:19:14,642 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-28 20:19:14,643 INFO L275 PluginConnector]: CDTParser initialized [2019-11-28 20:19:14,644 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/memsafety-ext3/scopes4-2.c [2019-11-28 20:19:14,714 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7dd7ebd31/f53e4551e7144b4ebac228b58e95ec18/FLAGeb5e9fc6d [2019-11-28 20:19:15,190 INFO L306 CDTParser]: Found 1 translation units. [2019-11-28 20:19:15,191 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/memsafety-ext3/scopes4-2.c [2019-11-28 20:19:15,198 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7dd7ebd31/f53e4551e7144b4ebac228b58e95ec18/FLAGeb5e9fc6d [2019-11-28 20:19:15,559 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7dd7ebd31/f53e4551e7144b4ebac228b58e95ec18 [2019-11-28 20:19:15,564 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-28 20:19:15,566 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-28 20:19:15,567 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-28 20:19:15,567 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-28 20:19:15,571 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-28 20:19:15,572 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 08:19:15" (1/1) ... [2019-11-28 20:19:15,575 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@57f6393 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:19:15, skipping insertion in model container [2019-11-28 20:19:15,575 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 08:19:15" (1/1) ... [2019-11-28 20:19:15,581 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-28 20:19:15,599 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-28 20:19:15,785 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-28 20:19:15,797 INFO L203 MainTranslator]: Completed pre-run [2019-11-28 20:19:15,814 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-28 20:19:15,832 INFO L208 MainTranslator]: Completed translation [2019-11-28 20:19:15,832 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:19:15 WrapperNode [2019-11-28 20:19:15,833 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-28 20:19:15,833 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-28 20:19:15,834 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-28 20:19:15,834 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-28 20:19:15,906 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:19:15" (1/1) ... [2019-11-28 20:19:15,906 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:19:15" (1/1) ... [2019-11-28 20:19:15,916 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:19:15" (1/1) ... [2019-11-28 20:19:15,917 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:19:15" (1/1) ... [2019-11-28 20:19:15,924 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:19:15" (1/1) ... [2019-11-28 20:19:15,925 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:19:15" (1/1) ... [2019-11-28 20:19:15,926 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:19:15" (1/1) ... [2019-11-28 20:19:15,928 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-28 20:19:15,929 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-28 20:19:15,929 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-28 20:19:15,929 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-28 20:19:15,930 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:19:15" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2019-11-28 20:19:15,988 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-28 20:19:15,989 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-28 20:19:15,989 INFO L138 BoogieDeclarations]: Found implementation of procedure foo2 [2019-11-28 20:19:15,989 INFO L138 BoogieDeclarations]: Found implementation of procedure foo [2019-11-28 20:19:15,989 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-28 20:19:15,990 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2019-11-28 20:19:15,990 INFO L130 BoogieDeclarations]: Found specification of procedure foo2 [2019-11-28 20:19:15,990 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-28 20:19:15,990 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-28 20:19:15,991 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-28 20:19:15,991 INFO L130 BoogieDeclarations]: Found specification of procedure foo [2019-11-28 20:19:15,991 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-28 20:19:15,991 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-28 20:19:15,991 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-28 20:19:15,992 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-11-28 20:19:15,992 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-28 20:19:16,230 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-28 20:19:16,231 INFO L287 CfgBuilder]: Removed 0 assume(true) statements. [2019-11-28 20:19:16,232 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 08:19:16 BoogieIcfgContainer [2019-11-28 20:19:16,233 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-28 20:19:16,234 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-28 20:19:16,234 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-28 20:19:16,237 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-28 20:19:16,238 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 08:19:15" (1/3) ... [2019-11-28 20:19:16,239 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67480783 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 08:19:16, skipping insertion in model container [2019-11-28 20:19:16,239 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:19:15" (2/3) ... [2019-11-28 20:19:16,239 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67480783 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 08:19:16, skipping insertion in model container [2019-11-28 20:19:16,240 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 08:19:16" (3/3) ... [2019-11-28 20:19:16,241 INFO L109 eAbstractionObserver]: Analyzing ICFG scopes4-2.c [2019-11-28 20:19:16,253 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-28 20:19:16,265 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 5 error locations. [2019-11-28 20:19:16,283 INFO L249 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2019-11-28 20:19:16,309 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-28 20:19:16,309 INFO L374 AbstractCegarLoop]: Hoare is false [2019-11-28 20:19:16,309 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-28 20:19:16,310 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-28 20:19:16,310 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-28 20:19:16,311 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-28 20:19:16,311 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-28 20:19:16,311 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-28 20:19:16,336 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2019-11-28 20:19:16,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-28 20:19:16,347 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 20:19:16,348 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 20:19:16,348 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr2ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, foo2Err0REQUIRES_VIOLATION, foo2Err1REQUIRES_VIOLATION]=== [2019-11-28 20:19:16,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 20:19:16,355 INFO L82 PathProgramCache]: Analyzing trace with hash 1728099290, now seen corresponding path program 1 times [2019-11-28 20:19:16,366 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 20:19:16,367 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651117301] [2019-11-28 20:19:16,367 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 20:19:16,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 20:19:16,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 20:19:16,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 20:19:16,632 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651117301] [2019-11-28 20:19:16,633 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-28 20:19:16,634 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-28 20:19:16,635 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158896944] [2019-11-28 20:19:16,639 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-28 20:19:16,640 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 20:19:16,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-28 20:19:16,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-28 20:19:16,653 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 4 states. [2019-11-28 20:19:16,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 20:19:16,775 INFO L93 Difference]: Finished difference Result 27 states and 26 transitions. [2019-11-28 20:19:16,776 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-28 20:19:16,777 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2019-11-28 20:19:16,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 20:19:16,786 INFO L225 Difference]: With dead ends: 27 [2019-11-28 20:19:16,786 INFO L226 Difference]: Without dead ends: 24 [2019-11-28 20:19:16,788 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-28 20:19:16,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-11-28 20:19:16,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2019-11-28 20:19:16,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-11-28 20:19:16,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 23 transitions. [2019-11-28 20:19:16,819 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 23 transitions. Word has length 10 [2019-11-28 20:19:16,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 20:19:16,820 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 23 transitions. [2019-11-28 20:19:16,820 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-28 20:19:16,820 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 23 transitions. [2019-11-28 20:19:16,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-28 20:19:16,821 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 20:19:16,821 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 20:19:16,821 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr2ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, foo2Err0REQUIRES_VIOLATION, foo2Err1REQUIRES_VIOLATION]=== [2019-11-28 20:19:16,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 20:19:16,822 INFO L82 PathProgramCache]: Analyzing trace with hash 1728099291, now seen corresponding path program 1 times [2019-11-28 20:19:16,822 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 20:19:16,822 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164014042] [2019-11-28 20:19:16,822 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 20:19:16,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 20:19:16,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 20:19:16,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 20:19:16,920 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164014042] [2019-11-28 20:19:16,921 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-28 20:19:16,921 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-28 20:19:16,921 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664015550] [2019-11-28 20:19:16,923 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-28 20:19:16,924 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 20:19:16,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-28 20:19:16,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-28 20:19:16,925 INFO L87 Difference]: Start difference. First operand 24 states and 23 transitions. Second operand 4 states. [2019-11-28 20:19:17,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 20:19:17,005 INFO L93 Difference]: Finished difference Result 23 states and 22 transitions. [2019-11-28 20:19:17,006 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-28 20:19:17,006 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2019-11-28 20:19:17,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 20:19:17,007 INFO L225 Difference]: With dead ends: 23 [2019-11-28 20:19:17,008 INFO L226 Difference]: Without dead ends: 23 [2019-11-28 20:19:17,009 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-28 20:19:17,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-11-28 20:19:17,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2019-11-28 20:19:17,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-11-28 20:19:17,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 22 transitions. [2019-11-28 20:19:17,015 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 22 transitions. Word has length 10 [2019-11-28 20:19:17,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 20:19:17,015 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 22 transitions. [2019-11-28 20:19:17,016 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-28 20:19:17,016 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 22 transitions. [2019-11-28 20:19:17,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-28 20:19:17,017 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 20:19:17,017 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 20:19:17,018 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr2ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, foo2Err0REQUIRES_VIOLATION, foo2Err1REQUIRES_VIOLATION]=== [2019-11-28 20:19:17,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 20:19:17,018 INFO L82 PathProgramCache]: Analyzing trace with hash 688977249, now seen corresponding path program 1 times [2019-11-28 20:19:17,019 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 20:19:17,019 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451876883] [2019-11-28 20:19:17,020 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 20:19:17,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 20:19:17,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 20:19:17,133 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 20:19:17,134 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-28 20:19:17,179 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 08:19:17 BoogieIcfgContainer [2019-11-28 20:19:17,180 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-28 20:19:17,185 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-28 20:19:17,185 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-28 20:19:17,186 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-28 20:19:17,186 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 08:19:16" (3/4) ... [2019-11-28 20:19:17,189 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-11-28 20:19:17,234 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2019-11-28 20:19:17,234 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-28 20:19:17,236 INFO L168 Benchmark]: Toolchain (without parser) took 1670.07 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 135.8 MB). Free memory was 960.4 MB in the beginning and 1.1 GB in the end (delta: -99.6 MB). Peak memory consumption was 36.2 MB. Max. memory is 11.5 GB. [2019-11-28 20:19:17,237 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 1.0 GB. Free memory is still 987.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-28 20:19:17,238 INFO L168 Benchmark]: CACSL2BoogieTranslator took 266.07 ms. Allocated memory is still 1.0 GB. Free memory was 960.4 MB in the beginning and 948.3 MB in the end (delta: 12.1 MB). Peak memory consumption was 12.1 MB. Max. memory is 11.5 GB. [2019-11-28 20:19:17,239 INFO L168 Benchmark]: Boogie Preprocessor took 95.29 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 135.8 MB). Free memory was 948.3 MB in the beginning and 1.1 GB in the end (delta: -177.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 11.5 GB. [2019-11-28 20:19:17,240 INFO L168 Benchmark]: RCFGBuilder took 303.91 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 19.4 MB). Peak memory consumption was 19.4 MB. Max. memory is 11.5 GB. [2019-11-28 20:19:17,240 INFO L168 Benchmark]: TraceAbstraction took 950.14 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 46.5 MB). Peak memory consumption was 46.5 MB. Max. memory is 11.5 GB. [2019-11-28 20:19:17,241 INFO L168 Benchmark]: Witness Printer took 49.20 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-28 20:19:17,245 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 1.0 GB. Free memory is still 987.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 266.07 ms. Allocated memory is still 1.0 GB. Free memory was 960.4 MB in the beginning and 948.3 MB in the end (delta: 12.1 MB). Peak memory consumption was 12.1 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 95.29 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 135.8 MB). Free memory was 948.3 MB in the beginning and 1.1 GB in the end (delta: -177.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 11.5 GB. * RCFGBuilder took 303.91 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 19.4 MB). Peak memory consumption was 19.4 MB. Max. memory is 11.5 GB. * TraceAbstraction took 950.14 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 46.5 MB). Peak memory consumption was 46.5 MB. Max. memory is 11.5 GB. * Witness Printer took 49.20 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 18]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L17] CALL, EXPR foo() [L12] int arr[123]; [L13] CALL, EXPR foo2() [L5] int arr[1024]; VAL [arr={5:0}] [L6] arr[194] = 13 VAL [arr={5:0}] [L7] return arr + 1; [L7] return arr + 1; VAL [\result={5:4}] [L13] RET, EXPR foo2() VAL [foo2()={5:4}] [L13] return foo2(); [L17] RET, EXPR foo() VAL [foo()={5:4}] [L17] int *a = foo(); [L18] \read(*a) - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 28 locations, 5 error locations. Result: UNSAFE, OverallTime: 0.8s, OverallIterations: 3, TraceHistogramMax: 1, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 39 SDtfs, 5 SDslu, 33 SDs, 0 SdLazy, 57 SolverSat, 6 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=28occurred 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, 0.2s InterpolantComputationTime, 38 NumberOfCodeBlocks, 38 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 18 ConstructedInterpolants, 0 QuantifiedInterpolants, 594 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, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...