./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 0ed9222f 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 0.1.24-0ed9222-m [2019-01-14 00:34:17,900 INFO L170 SettingsManager]: Resetting all preferences to default values... [2019-01-14 00:34:17,901 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2019-01-14 00:34:17,914 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-01-14 00:34:17,914 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-01-14 00:34:17,915 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-01-14 00:34:17,916 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-01-14 00:34:17,919 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2019-01-14 00:34:17,921 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-01-14 00:34:17,921 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-01-14 00:34:17,923 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-01-14 00:34:17,923 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-01-14 00:34:17,924 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-01-14 00:34:17,925 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-01-14 00:34:17,927 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-01-14 00:34:17,928 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-01-14 00:34:17,929 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-01-14 00:34:17,931 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-01-14 00:34:17,933 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2019-01-14 00:34:17,935 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-01-14 00:34:17,937 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-01-14 00:34:17,938 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-01-14 00:34:17,941 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-01-14 00:34:17,941 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-01-14 00:34:17,942 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-01-14 00:34:17,943 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-01-14 00:34:17,944 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-01-14 00:34:17,945 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-01-14 00:34:17,946 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2019-01-14 00:34:17,948 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-01-14 00:34:17,948 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2019-01-14 00:34:17,949 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-01-14 00:34:17,949 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-01-14 00:34:17,949 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2019-01-14 00:34:17,951 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2019-01-14 00:34:17,952 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2019-01-14 00:34:17,952 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2019-01-14 00:34:17,983 INFO L110 SettingsManager]: Loading preferences was successful [2019-01-14 00:34:17,983 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2019-01-14 00:34:17,984 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-01-14 00:34:17,985 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2019-01-14 00:34:17,985 INFO L133 SettingsManager]: * Use SBE=true [2019-01-14 00:34:17,985 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-01-14 00:34:17,985 INFO L133 SettingsManager]: * sizeof long=4 [2019-01-14 00:34:17,985 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-01-14 00:34:17,985 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2019-01-14 00:34:17,986 INFO L133 SettingsManager]: * sizeof POINTER=4 [2019-01-14 00:34:17,986 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2019-01-14 00:34:17,986 INFO L133 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2019-01-14 00:34:17,986 INFO L133 SettingsManager]: * Bitprecise bitfields=true [2019-01-14 00:34:17,986 INFO L133 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2019-01-14 00:34:17,986 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-01-14 00:34:17,987 INFO L133 SettingsManager]: * sizeof long double=12 [2019-01-14 00:34:17,989 INFO L133 SettingsManager]: * Use constant arrays=true [2019-01-14 00:34:17,989 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-01-14 00:34:17,989 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-01-14 00:34:17,990 INFO L133 SettingsManager]: * To the following directory=./dump/ [2019-01-14 00:34:17,990 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2019-01-14 00:34:17,990 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-01-14 00:34:17,990 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-01-14 00:34:17,990 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-01-14 00:34:17,990 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2019-01-14 00:34:17,991 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-01-14 00:34:17,991 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 [2019-01-14 00:34:18,032 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-01-14 00:34:18,046 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-01-14 00:34:18,051 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-01-14 00:34:18,052 INFO L271 PluginConnector]: Initializing CDTParser... [2019-01-14 00:34:18,053 INFO L276 PluginConnector]: CDTParser initialized [2019-01-14 00:34:18,053 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/svcomp/c/loops/invert_string_false-valid-deref.c [2019-01-14 00:34:18,112 INFO L221 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1e39b61bd/826f7f1ad111440bbc1204fb4a07cf0e/FLAGf5f50e9d4 [2019-01-14 00:34:18,534 INFO L307 CDTParser]: Found 1 translation units. [2019-01-14 00:34:18,535 INFO L161 CDTParser]: Scanning /storage/repos/svcomp/c/loops/invert_string_false-valid-deref.c [2019-01-14 00:34:18,542 INFO L355 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1e39b61bd/826f7f1ad111440bbc1204fb4a07cf0e/FLAGf5f50e9d4 [2019-01-14 00:34:18,883 INFO L363 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1e39b61bd/826f7f1ad111440bbc1204fb4a07cf0e [2019-01-14 00:34:18,887 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-01-14 00:34:18,889 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-01-14 00:34:18,890 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-01-14 00:34:18,890 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-01-14 00:34:18,894 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2019-01-14 00:34:18,895 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.01 12:34:18" (1/1) ... [2019-01-14 00:34:18,899 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@27e51134 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.01 12:34:18, skipping insertion in model container [2019-01-14 00:34:18,899 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.01 12:34:18" (1/1) ... [2019-01-14 00:34:18,907 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-01-14 00:34:18,926 INFO L176 MainTranslator]: Built tables and reachable declarations [2019-01-14 00:34:19,141 INFO L208 PostProcessor]: Analyzing one entry point: main [2019-01-14 00:34:19,149 INFO L191 MainTranslator]: Completed pre-run [2019-01-14 00:34:19,184 INFO L208 PostProcessor]: Analyzing one entry point: main [2019-01-14 00:34:19,217 INFO L195 MainTranslator]: Completed translation [2019-01-14 00:34:19,218 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.01 12:34:19 WrapperNode [2019-01-14 00:34:19,219 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-01-14 00:34:19,220 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-01-14 00:34:19,221 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-01-14 00:34:19,221 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2019-01-14 00:34:19,236 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.01 12:34:19" (1/1) ... [2019-01-14 00:34:19,236 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.01 12:34:19" (1/1) ... [2019-01-14 00:34:19,245 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.01 12:34:19" (1/1) ... [2019-01-14 00:34:19,247 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.01 12:34:19" (1/1) ... [2019-01-14 00:34:19,265 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.01 12:34:19" (1/1) ... [2019-01-14 00:34:19,271 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.01 12:34:19" (1/1) ... [2019-01-14 00:34:19,278 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.01 12:34:19" (1/1) ... [2019-01-14 00:34:19,280 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-01-14 00:34:19,285 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-01-14 00:34:19,285 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-01-14 00:34:19,285 INFO L276 PluginConnector]: RCFGBuilder initialized [2019-01-14 00:34:19,286 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.01 12:34:19" (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 [2019-01-14 00:34:19,407 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-01-14 00:34:19,408 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-01-14 00:34:19,408 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-01-14 00:34:19,408 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-01-14 00:34:19,408 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-01-14 00:34:19,408 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-01-14 00:34:19,408 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2019-01-14 00:34:19,408 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2019-01-14 00:34:19,409 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-01-14 00:34:19,409 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-01-14 00:34:19,409 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-01-14 00:34:19,409 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-01-14 00:34:19,409 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-01-14 00:34:19,409 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-01-14 00:34:19,409 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-01-14 00:34:19,895 INFO L281 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-01-14 00:34:19,895 INFO L286 CfgBuilder]: Removed 3 assue(true) statements. [2019-01-14 00:34:19,896 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.01 12:34:19 BoogieIcfgContainer [2019-01-14 00:34:19,897 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-01-14 00:34:19,898 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-01-14 00:34:19,898 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-01-14 00:34:19,901 INFO L276 PluginConnector]: TraceAbstraction initialized [2019-01-14 00:34:19,901 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.01 12:34:18" (1/3) ... [2019-01-14 00:34:19,902 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29d0dede and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.01 12:34:19, skipping insertion in model container [2019-01-14 00:34:19,902 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.01 12:34:19" (2/3) ... [2019-01-14 00:34:19,903 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29d0dede and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.01 12:34:19, skipping insertion in model container [2019-01-14 00:34:19,903 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.01 12:34:19" (3/3) ... [2019-01-14 00:34:19,905 INFO L112 eAbstractionObserver]: Analyzing ICFG invert_string_false-valid-deref.c [2019-01-14 00:34:19,915 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-01-14 00:34:19,923 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 13 error locations. [2019-01-14 00:34:19,939 INFO L257 AbstractCegarLoop]: Starting to check reachability of 13 error locations. [2019-01-14 00:34:19,968 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2019-01-14 00:34:19,969 INFO L382 AbstractCegarLoop]: Interprodecural is true [2019-01-14 00:34:19,969 INFO L383 AbstractCegarLoop]: Hoare is false [2019-01-14 00:34:19,969 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-01-14 00:34:19,969 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-01-14 00:34:19,969 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-01-14 00:34:19,969 INFO L387 AbstractCegarLoop]: Difference is false [2019-01-14 00:34:19,970 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-01-14 00:34:19,970 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-01-14 00:34:19,991 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states. [2019-01-14 00:34:20,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-01-14 00:34:20,003 INFO L394 BasicCegarLoop]: Found error trace [2019-01-14 00:34:20,004 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-01-14 00:34:20,005 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr5REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr12ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-01-14 00:34:20,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-14 00:34:20,011 INFO L82 PathProgramCache]: Analyzing trace with hash -523138443, now seen corresponding path program 1 times [2019-01-14 00:34:20,012 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-01-14 00:34:20,012 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-01-14 00:34:20,064 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-14 00:34:20,064 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-14 00:34:20,064 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-14 00:34:20,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-14 00:34:20,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-14 00:34:20,151 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-01-14 00:34:20,152 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-01-14 00:34:20,155 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-01-14 00:34:20,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-01-14 00:34:20,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-01-14 00:34:20,171 INFO L87 Difference]: Start difference. First operand 47 states. Second operand 2 states. [2019-01-14 00:34:20,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-14 00:34:20,188 INFO L93 Difference]: Finished difference Result 47 states and 49 transitions. [2019-01-14 00:34:20,188 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-01-14 00:34:20,189 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 8 [2019-01-14 00:34:20,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-14 00:34:20,197 INFO L225 Difference]: With dead ends: 47 [2019-01-14 00:34:20,198 INFO L226 Difference]: Without dead ends: 43 [2019-01-14 00:34:20,199 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 [2019-01-14 00:34:20,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-01-14 00:34:20,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2019-01-14 00:34:20,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-01-14 00:34:20,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2019-01-14 00:34:20,237 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 8 [2019-01-14 00:34:20,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-14 00:34:20,237 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2019-01-14 00:34:20,238 INFO L481 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-01-14 00:34:20,238 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2019-01-14 00:34:20,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-01-14 00:34:20,238 INFO L394 BasicCegarLoop]: Found error trace [2019-01-14 00:34:20,239 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-01-14 00:34:20,239 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr5REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr12ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-01-14 00:34:20,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-14 00:34:20,239 INFO L82 PathProgramCache]: Analyzing trace with hash -523138753, now seen corresponding path program 1 times [2019-01-14 00:34:20,240 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-01-14 00:34:20,240 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-01-14 00:34:20,241 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-14 00:34:20,241 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-14 00:34:20,241 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-14 00:34:20,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-14 00:34:20,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-14 00:34:20,320 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-01-14 00:34:20,320 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-01-14 00:34:20,322 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-01-14 00:34:20,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-01-14 00:34:20,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-01-14 00:34:20,323 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand 3 states. [2019-01-14 00:34:20,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-14 00:34:20,459 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2019-01-14 00:34:20,459 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-01-14 00:34:20,459 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2019-01-14 00:34:20,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-14 00:34:20,460 INFO L225 Difference]: With dead ends: 39 [2019-01-14 00:34:20,460 INFO L226 Difference]: Without dead ends: 39 [2019-01-14 00:34:20,461 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 [2019-01-14 00:34:20,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-01-14 00:34:20,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2019-01-14 00:34:20,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-01-14 00:34:20,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2019-01-14 00:34:20,469 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 8 [2019-01-14 00:34:20,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-14 00:34:20,469 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2019-01-14 00:34:20,469 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-01-14 00:34:20,469 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2019-01-14 00:34:20,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-01-14 00:34:20,470 INFO L394 BasicCegarLoop]: Found error trace [2019-01-14 00:34:20,470 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-01-14 00:34:20,470 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr5REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr12ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-01-14 00:34:20,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-14 00:34:20,471 INFO L82 PathProgramCache]: Analyzing trace with hash -523138752, now seen corresponding path program 1 times [2019-01-14 00:34:20,471 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-01-14 00:34:20,471 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-01-14 00:34:20,472 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-14 00:34:20,472 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-14 00:34:20,472 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-14 00:34:20,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-01-14 00:34:20,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-01-14 00:34:20,576 INFO L469 BasicCegarLoop]: Counterexample might be feasible [2019-01-14 00:34:20,594 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.01 12:34:20 BoogieIcfgContainer [2019-01-14 00:34:20,594 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-01-14 00:34:20,595 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-01-14 00:34:20,595 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-01-14 00:34:20,595 INFO L276 PluginConnector]: Witness Printer initialized [2019-01-14 00:34:20,596 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.01 12:34:19" (3/4) ... [2019-01-14 00:34:20,598 INFO L138 WitnessPrinter]: Generating witness for reachability counterexample [2019-01-14 00:34:20,635 INFO L145 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2019-01-14 00:34:20,636 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-01-14 00:34:20,636 INFO L168 Benchmark]: Toolchain (without parser) took 1749.07 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 116.9 MB). Free memory was 948.6 MB in the beginning and 1.0 GB in the end (delta: -98.5 MB). Peak memory consumption was 18.4 MB. Max. memory is 11.5 GB. [2019-01-14 00:34:20,638 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. [2019-01-14 00:34:20,639 INFO L168 Benchmark]: CACSL2BoogieTranslator took 330.20 ms. Allocated memory is still 1.0 GB. Free memory was 948.6 MB in the beginning and 937.9 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2019-01-14 00:34:20,639 INFO L168 Benchmark]: Boogie Preprocessor took 60.00 ms. Allocated memory is still 1.0 GB. Free memory was 937.9 MB in the beginning and 932.5 MB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. [2019-01-14 00:34:20,640 INFO L168 Benchmark]: RCFGBuilder took 612.31 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 116.9 MB). Free memory was 932.5 MB in the beginning and 1.1 GB in the end (delta: -148.3 MB). Peak memory consumption was 13.0 MB. Max. memory is 11.5 GB. [2019-01-14 00:34:20,641 INFO L168 Benchmark]: TraceAbstraction took 696.68 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 33.7 MB). Peak memory consumption was 33.7 MB. Max. memory is 11.5 GB. [2019-01-14 00:34:20,642 INFO L168 Benchmark]: Witness Printer took 40.98 ms. Allocated memory is still 1.1 GB. Free memory is still 1.0 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-01-14 00:34:20,647 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 330.20 ms. Allocated memory is still 1.0 GB. Free memory was 948.6 MB in the beginning and 937.9 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 60.00 ms. Allocated memory is still 1.0 GB. Free memory was 937.9 MB in the beginning and 932.5 MB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. * RCFGBuilder took 612.31 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 116.9 MB). Free memory was 932.5 MB in the beginning and 1.1 GB in the end (delta: -148.3 MB). Peak memory consumption was 13.0 MB. Max. memory is 11.5 GB. * TraceAbstraction took 696.68 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 33.7 MB). Peak memory consumption was 33.7 MB. Max. memory is 11.5 GB. * Witness Printer took 40.98 ms. Allocated memory is still 1.1 GB. Free memory is still 1.0 GB. There was no memory consumed. 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