./Ultimate.py --spec /storage/repos/svcomp/c/properties/valid-memsafety.prp --file /storage/repos/svcomp/c/loops/invert_string_false-valid-deref.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 2e94e6aa Calling Ultimate with: 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 /storage/repos/svcomp/c/loops/invert_string_false-valid-deref.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 01c8dcbf548ac0eef8cebe655947adbb13d26f9a ...................................................................................................................................................................................................................................................................................................... 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 0.1.24-2e94e6a [2019-01-01 19:51:49,180 INFO L170 SettingsManager]: Resetting all preferences to default values... [2019-01-01 19:51:49,181 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2019-01-01 19:51:49,200 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-01-01 19:51:49,201 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-01-01 19:51:49,202 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-01-01 19:51:49,204 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-01-01 19:51:49,207 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2019-01-01 19:51:49,209 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-01-01 19:51:49,212 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-01-01 19:51:49,215 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-01-01 19:51:49,216 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-01-01 19:51:49,217 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-01-01 19:51:49,218 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-01-01 19:51:49,219 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-01-01 19:51:49,220 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-01-01 19:51:49,221 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-01-01 19:51:49,223 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-01-01 19:51:49,225 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2019-01-01 19:51:49,227 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-01-01 19:51:49,228 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-01-01 19:51:49,230 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-01-01 19:51:49,232 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-01-01 19:51:49,233 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-01-01 19:51:49,233 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-01-01 19:51:49,234 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-01-01 19:51:49,235 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-01-01 19:51:49,236 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-01-01 19:51:49,237 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2019-01-01 19:51:49,238 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-01-01 19:51:49,239 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2019-01-01 19:51:49,239 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-01-01 19:51:49,240 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-01-01 19:51:49,240 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2019-01-01 19:51:49,241 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2019-01-01 19:51:49,242 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2019-01-01 19:51:49,243 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2019-01-01 19:51:49,261 INFO L110 SettingsManager]: Loading preferences was successful [2019-01-01 19:51:49,261 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2019-01-01 19:51:49,263 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-01-01 19:51:49,263 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2019-01-01 19:51:49,264 INFO L133 SettingsManager]: * Use SBE=true [2019-01-01 19:51:49,264 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-01-01 19:51:49,264 INFO L133 SettingsManager]: * sizeof long=4 [2019-01-01 19:51:49,264 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-01-01 19:51:49,264 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2019-01-01 19:51:49,265 INFO L133 SettingsManager]: * sizeof POINTER=4 [2019-01-01 19:51:49,265 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2019-01-01 19:51:49,265 INFO L133 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2019-01-01 19:51:49,265 INFO L133 SettingsManager]: * Bitprecise bitfields=true [2019-01-01 19:51:49,265 INFO L133 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2019-01-01 19:51:49,265 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-01-01 19:51:49,266 INFO L133 SettingsManager]: * sizeof long double=12 [2019-01-01 19:51:49,267 INFO L133 SettingsManager]: * Use constant arrays=true [2019-01-01 19:51:49,267 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-01-01 19:51:49,267 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-01-01 19:51:49,267 INFO L133 SettingsManager]: * To the following directory=./dump/ [2019-01-01 19:51:49,268 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2019-01-01 19:51:49,268 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-01-01 19:51:49,268 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-01-01 19:51:49,269 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-01-01 19:51:49,269 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2019-01-01 19:51:49,269 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-01-01 19:51:49,269 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in 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 -> 01c8dcbf548ac0eef8cebe655947adbb13d26f9a [2019-01-01 19:51:49,305 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-01-01 19:51:49,326 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-01-01 19:51:49,330 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-01-01 19:51:49,332 INFO L271 PluginConnector]: Initializing CDTParser... [2019-01-01 19:51:49,332 INFO L276 PluginConnector]: CDTParser initialized [2019-01-01 19:51:49,333 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/svcomp/c/loops/invert_string_false-valid-deref.c [2019-01-01 19:51:49,391 INFO L221 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0cc9bd580/02e78927b3e246eeb17ab41a38489340/FLAGfc9792c2e [2019-01-01 19:51:49,822 INFO L307 CDTParser]: Found 1 translation units. [2019-01-01 19:51:49,823 INFO L161 CDTParser]: Scanning /storage/repos/svcomp/c/loops/invert_string_false-valid-deref.c [2019-01-01 19:51:49,829 INFO L355 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0cc9bd580/02e78927b3e246eeb17ab41a38489340/FLAGfc9792c2e [2019-01-01 19:51:50,203 INFO L363 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0cc9bd580/02e78927b3e246eeb17ab41a38489340 [2019-01-01 19:51:50,206 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-01-01 19:51:50,208 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-01-01 19:51:50,209 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-01-01 19:51:50,210 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-01-01 19:51:50,214 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2019-01-01 19:51:50,215 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.01 07:51:50" (1/1) ... [2019-01-01 19:51:50,218 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@56cd1cc1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.01 07:51:50, skipping insertion in model container [2019-01-01 19:51:50,218 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.01 07:51:50" (1/1) ... [2019-01-01 19:51:50,227 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-01-01 19:51:50,246 INFO L176 MainTranslator]: Built tables and reachable declarations [2019-01-01 19:51:50,480 INFO L204 PostProcessor]: Analyzing one entry point: main [2019-01-01 19:51:50,490 INFO L191 MainTranslator]: Completed pre-run [2019-01-01 19:51:50,520 INFO L204 PostProcessor]: Analyzing one entry point: main [2019-01-01 19:51:50,544 INFO L195 MainTranslator]: Completed translation [2019-01-01 19:51:50,545 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.01 07:51:50 WrapperNode [2019-01-01 19:51:50,545 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-01-01 19:51:50,545 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-01-01 19:51:50,546 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-01-01 19:51:50,546 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2019-01-01 19:51:50,563 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.01 07:51:50" (1/1) ... [2019-01-01 19:51:50,563 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.01 07:51:50" (1/1) ... [2019-01-01 19:51:50,573 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.01 07:51:50" (1/1) ... [2019-01-01 19:51:50,574 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.01 07:51:50" (1/1) ... [2019-01-01 19:51:50,582 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.01 07:51:50" (1/1) ... [2019-01-01 19:51:50,590 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.01 07:51:50" (1/1) ... [2019-01-01 19:51:50,593 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.01 07:51:50" (1/1) ... [2019-01-01 19:51:50,598 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-01-01 19:51:50,601 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-01-01 19:51:50,604 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-01-01 19:51:50,604 INFO L276 PluginConnector]: RCFGBuilder initialized [2019-01-01 19:51:50,606 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.01 07:51:50" (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 [2019-01-01 19:51:50,738 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-01-01 19:51:50,738 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-01-01 19:51:50,738 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-01-01 19:51:50,738 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-01-01 19:51:50,738 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-01-01 19:51:50,738 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-01-01 19:51:50,739 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2019-01-01 19:51:50,739 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2019-01-01 19:51:50,739 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-01-01 19:51:50,739 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-01-01 19:51:50,739 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-01-01 19:51:50,739 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-01-01 19:51:50,739 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-01-01 19:51:50,741 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-01-01 19:51:50,741 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-01-01 19:51:51,251 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-01-01 19:51:51,251 INFO L280 CfgBuilder]: Removed 3 assue(true) statements. [2019-01-01 19:51:51,252 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.01 07:51:51 BoogieIcfgContainer [2019-01-01 19:51:51,252 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-01-01 19:51:51,254 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-01-01 19:51:51,255 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-01-01 19:51:51,258 INFO L276 PluginConnector]: TraceAbstraction initialized [2019-01-01 19:51:51,259 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.01 07:51:50" (1/3) ... [2019-01-01 19:51:51,260 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@cb09835 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.01 07:51:51, skipping insertion in model container [2019-01-01 19:51:51,261 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.01 07:51:50" (2/3) ... [2019-01-01 19:51:51,261 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@cb09835 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.01 07:51:51, skipping insertion in model container [2019-01-01 19:51:51,262 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.01 07:51:51" (3/3) ... [2019-01-01 19:51:51,263 INFO L112 eAbstractionObserver]: Analyzing ICFG invert_string_false-valid-deref.c [2019-01-01 19:51:51,274 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-01-01 19:51:51,281 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 13 error locations. [2019-01-01 19:51:51,297 INFO L257 AbstractCegarLoop]: Starting to check reachability of 13 error locations. [2019-01-01 19:51:51,326 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2019-01-01 19:51:51,327 INFO L382 AbstractCegarLoop]: Interprodecural is true [2019-01-01 19:51:51,327 INFO L383 AbstractCegarLoop]: Hoare is false [2019-01-01 19:51:51,328 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-01-01 19:51:51,328 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-01-01 19:51:51,328 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-01-01 19:51:51,328 INFO L387 AbstractCegarLoop]: Difference is false [2019-01-01 19:51:51,329 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-01-01 19:51:51,329 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-01-01 19:51:51,350 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states. [2019-01-01 19:51:51,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-01-01 19:51:51,360 INFO L394 BasicCegarLoop]: Found error trace [2019-01-01 19:51:51,361 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-01-01 19:51:51,362 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr10REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr8REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr12ENSURES_VIOLATIONMEMORY_LEAK, mainErr6REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION]=== [2019-01-01 19:51:51,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-01 19:51:51,368 INFO L82 PathProgramCache]: Analyzing trace with hash -523138443, now seen corresponding path program 1 times [2019-01-01 19:51:51,370 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-01-01 19:51:51,371 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-01-01 19:51:51,416 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-01 19:51:51,416 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-01 19:51:51,416 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-01 19:51:51,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-01 19:51:51,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-01 19:51:51,512 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-01-01 19:51:51,513 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-01-01 19:51:51,517 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-01-01 19:51:51,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-01-01 19:51:51,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-01-01 19:51:51,535 INFO L87 Difference]: Start difference. First operand 47 states. Second operand 2 states. [2019-01-01 19:51:51,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-01 19:51:51,553 INFO L93 Difference]: Finished difference Result 47 states and 49 transitions. [2019-01-01 19:51:51,554 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-01-01 19:51:51,555 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 8 [2019-01-01 19:51:51,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-01 19:51:51,564 INFO L225 Difference]: With dead ends: 47 [2019-01-01 19:51:51,564 INFO L226 Difference]: Without dead ends: 43 [2019-01-01 19:51:51,566 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-01-01 19:51:51,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-01-01 19:51:51,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2019-01-01 19:51:51,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-01-01 19:51:51,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2019-01-01 19:51:51,603 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 8 [2019-01-01 19:51:51,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-01 19:51:51,603 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2019-01-01 19:51:51,603 INFO L481 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-01-01 19:51:51,604 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2019-01-01 19:51:51,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-01-01 19:51:51,604 INFO L394 BasicCegarLoop]: Found error trace [2019-01-01 19:51:51,604 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-01-01 19:51:51,605 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr10REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr8REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr12ENSURES_VIOLATIONMEMORY_LEAK, mainErr6REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION]=== [2019-01-01 19:51:51,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-01 19:51:51,605 INFO L82 PathProgramCache]: Analyzing trace with hash -523138753, now seen corresponding path program 1 times [2019-01-01 19:51:51,605 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-01-01 19:51:51,605 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-01-01 19:51:51,606 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-01 19:51:51,607 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-01 19:51:51,607 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-01 19:51:51,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-01 19:51:51,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-01 19:51:51,762 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-01-01 19:51:51,762 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-01-01 19:51:51,764 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-01-01 19:51:51,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-01-01 19:51:51,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-01-01 19:51:51,764 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand 3 states. [2019-01-01 19:51:52,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-01 19:51:52,022 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2019-01-01 19:51:52,022 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-01-01 19:51:52,023 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2019-01-01 19:51:52,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-01 19:51:52,024 INFO L225 Difference]: With dead ends: 39 [2019-01-01 19:51:52,024 INFO L226 Difference]: Without dead ends: 39 [2019-01-01 19:51:52,027 INFO L631 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 [2019-01-01 19:51:52,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-01-01 19:51:52,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2019-01-01 19:51:52,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-01-01 19:51:52,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2019-01-01 19:51:52,033 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 8 [2019-01-01 19:51:52,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-01 19:51:52,033 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2019-01-01 19:51:52,033 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-01-01 19:51:52,033 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2019-01-01 19:51:52,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-01-01 19:51:52,034 INFO L394 BasicCegarLoop]: Found error trace [2019-01-01 19:51:52,034 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-01-01 19:51:52,034 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr10REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr8REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr12ENSURES_VIOLATIONMEMORY_LEAK, mainErr6REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION]=== [2019-01-01 19:51:52,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-01 19:51:52,035 INFO L82 PathProgramCache]: Analyzing trace with hash -523138752, now seen corresponding path program 1 times [2019-01-01 19:51:52,035 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-01-01 19:51:52,035 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-01-01 19:51:52,036 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-01 19:51:52,036 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-01 19:51:52,036 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-01 19:51:52,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-01-01 19:51:52,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-01-01 19:51:52,145 INFO L469 BasicCegarLoop]: Counterexample might be feasible [2019-01-01 19:51:52,165 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.01 07:51:52 BoogieIcfgContainer [2019-01-01 19:51:52,165 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-01-01 19:51:52,166 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-01-01 19:51:52,166 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-01-01 19:51:52,166 INFO L276 PluginConnector]: Witness Printer initialized [2019-01-01 19:51:52,168 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.01 07:51:51" (3/4) ... [2019-01-01 19:51:52,170 INFO L138 WitnessPrinter]: Generating witness for reachability counterexample [2019-01-01 19:51:52,211 INFO L145 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2019-01-01 19:51:52,212 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-01-01 19:51:52,213 INFO L168 Benchmark]: Toolchain (without parser) took 2005.97 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 77.6 MB). Free memory was 951.3 MB in the beginning and 1.0 GB in the end (delta: -58.7 MB). Peak memory consumption was 18.9 MB. Max. memory is 11.5 GB. [2019-01-01 19:51:52,215 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 978.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-01-01 19:51:52,215 INFO L168 Benchmark]: CACSL2BoogieTranslator took 335.68 ms. Allocated memory is still 1.0 GB. Free memory was 951.3 MB in the beginning and 940.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2019-01-01 19:51:52,216 INFO L168 Benchmark]: Boogie Preprocessor took 55.13 ms. Allocated memory is still 1.0 GB. Free memory is still 940.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-01-01 19:51:52,217 INFO L168 Benchmark]: RCFGBuilder took 651.50 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 77.6 MB). Free memory was 940.6 MB in the beginning and 1.0 GB in the end (delta: -104.0 MB). Peak memory consumption was 18.4 MB. Max. memory is 11.5 GB. [2019-01-01 19:51:52,218 INFO L168 Benchmark]: TraceAbstraction took 911.14 ms. Allocated memory is still 1.1 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 27.6 MB). Peak memory consumption was 27.6 MB. Max. memory is 11.5 GB. [2019-01-01 19:51:52,218 INFO L168 Benchmark]: Witness Printer took 45.88 ms. Allocated memory is still 1.1 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 6.9 MB). Peak memory consumption was 6.9 MB. Max. memory is 11.5 GB. [2019-01-01 19:51:52,223 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 978.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 335.68 ms. Allocated memory is still 1.0 GB. Free memory was 951.3 MB in the beginning and 940.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 55.13 ms. Allocated memory is still 1.0 GB. Free memory is still 940.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 651.50 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 77.6 MB). Free memory was 940.6 MB in the beginning and 1.0 GB in the end (delta: -104.0 MB). Peak memory consumption was 18.4 MB. Max. memory is 11.5 GB. * TraceAbstraction took 911.14 ms. Allocated memory is still 1.1 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 27.6 MB). Peak memory consumption was 27.6 MB. Max. memory is 11.5 GB. * Witness Printer took 45.88 ms. Allocated memory is still 1.1 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 6.9 MB). Peak memory consumption was 6.9 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 21]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L13] int MAX = __VERIFIER_nondet_uint(); [L14] char str1[MAX], str2[MAX]; [L15] int cont, i, j; [L16] cont = 0 [L18] i=0 VAL [cont=0, i=0, MAX=0, str1={1:0}, str2={-1:0}] [L18] COND FALSE !(i