./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/loops/invert_string-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 30f4e4ab 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/loops/invert_string-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 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 0.1.24-30f4e4a [2019-11-28 02:45:18,054 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-28 02:45:18,056 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-28 02:45:18,069 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-28 02:45:18,069 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-28 02:45:18,071 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-28 02:45:18,072 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-28 02:45:18,074 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-28 02:45:18,076 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-28 02:45:18,077 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-28 02:45:18,079 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-28 02:45:18,080 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-28 02:45:18,081 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-28 02:45:18,082 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-28 02:45:18,083 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-28 02:45:18,088 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-28 02:45:18,089 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-28 02:45:18,092 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-28 02:45:18,094 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-28 02:45:18,100 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-28 02:45:18,103 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-28 02:45:18,108 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-28 02:45:18,109 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-28 02:45:18,113 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-28 02:45:18,117 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-28 02:45:18,117 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-28 02:45:18,118 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-28 02:45:18,119 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-28 02:45:18,120 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-28 02:45:18,122 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-28 02:45:18,123 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-28 02:45:18,125 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-28 02:45:18,125 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-28 02:45:18,126 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-28 02:45:18,128 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-28 02:45:18,128 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-28 02:45:18,129 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-28 02:45:18,129 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-28 02:45:18,129 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-28 02:45:18,131 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-28 02:45:18,131 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-28 02:45:18,132 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2019-11-28 02:45:18,147 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-28 02:45:18,148 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-28 02:45:18,149 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-28 02:45:18,150 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-28 02:45:18,150 INFO L138 SettingsManager]: * Use SBE=true [2019-11-28 02:45:18,150 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-28 02:45:18,151 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-28 02:45:18,151 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-11-28 02:45:18,151 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-28 02:45:18,151 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-28 02:45:18,152 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-28 02:45:18,152 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2019-11-28 02:45:18,152 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2019-11-28 02:45:18,153 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2019-11-28 02:45:18,153 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-28 02:45:18,153 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-28 02:45:18,153 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-28 02:45:18,154 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-28 02:45:18,154 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-28 02:45:18,154 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-28 02:45:18,154 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-28 02:45:18,155 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-28 02:45:18,155 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-28 02:45:18,155 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-28 02:45:18,156 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-28 02:45:18,156 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-28 02:45:18,156 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-28 02:45:18,156 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 -> 01c8dcbf548ac0eef8cebe655947adbb13d26f9a [2019-11-28 02:45:18,461 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-28 02:45:18,475 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-28 02:45:18,478 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-28 02:45:18,480 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-28 02:45:18,480 INFO L275 PluginConnector]: CDTParser initialized [2019-11-28 02:45:18,481 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops/invert_string-2.c [2019-11-28 02:45:18,560 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fbe92d7dc/75edf6cb11f842ffae99d33ffd112ef1/FLAGc4a1d07a3 [2019-11-28 02:45:19,045 INFO L306 CDTParser]: Found 1 translation units. [2019-11-28 02:45:19,046 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops/invert_string-2.c [2019-11-28 02:45:19,053 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fbe92d7dc/75edf6cb11f842ffae99d33ffd112ef1/FLAGc4a1d07a3 [2019-11-28 02:45:19,432 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fbe92d7dc/75edf6cb11f842ffae99d33ffd112ef1 [2019-11-28 02:45:19,436 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-28 02:45:19,438 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-28 02:45:19,440 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-28 02:45:19,440 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-28 02:45:19,444 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-28 02:45:19,445 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 02:45:19" (1/1) ... [2019-11-28 02:45:19,448 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@600cef8d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:45:19, skipping insertion in model container [2019-11-28 02:45:19,448 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 02:45:19" (1/1) ... [2019-11-28 02:45:19,456 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-28 02:45:19,474 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-28 02:45:19,670 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-28 02:45:19,676 INFO L203 MainTranslator]: Completed pre-run [2019-11-28 02:45:19,697 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-28 02:45:19,721 INFO L208 MainTranslator]: Completed translation [2019-11-28 02:45:19,722 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:45:19 WrapperNode [2019-11-28 02:45:19,722 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-28 02:45:19,723 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-28 02:45:19,723 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-28 02:45:19,723 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-28 02:45:19,790 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:45:19" (1/1) ... [2019-11-28 02:45:19,790 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:45:19" (1/1) ... [2019-11-28 02:45:19,798 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:45:19" (1/1) ... [2019-11-28 02:45:19,798 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:45:19" (1/1) ... [2019-11-28 02:45:19,809 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:45:19" (1/1) ... [2019-11-28 02:45:19,815 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:45:19" (1/1) ... [2019-11-28 02:45:19,817 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:45:19" (1/1) ... [2019-11-28 02:45:19,819 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-28 02:45:19,820 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-28 02:45:19,820 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-28 02:45:19,821 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-28 02:45:19,822 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:45:19" (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 [2019-11-28 02:45:19,886 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-28 02:45:19,886 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-28 02:45:19,886 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-11-28 02:45:19,886 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-28 02:45:19,886 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-28 02:45:19,887 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-11-28 02:45:19,887 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2019-11-28 02:45:19,887 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2019-11-28 02:45:19,887 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-28 02:45:19,887 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-28 02:45:19,887 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-28 02:45:19,888 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-28 02:45:19,888 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-28 02:45:19,888 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-28 02:45:19,888 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-28 02:45:20,242 INFO L292 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-28 02:45:20,242 INFO L297 CfgBuilder]: Removed 3 assume(true) statements. [2019-11-28 02:45:20,244 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 02:45:20 BoogieIcfgContainer [2019-11-28 02:45:20,244 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-28 02:45:20,245 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-28 02:45:20,246 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-28 02:45:20,249 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-28 02:45:20,250 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 02:45:19" (1/3) ... [2019-11-28 02:45:20,251 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a8b683e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 02:45:20, skipping insertion in model container [2019-11-28 02:45:20,251 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:45:19" (2/3) ... [2019-11-28 02:45:20,252 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a8b683e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 02:45:20, skipping insertion in model container [2019-11-28 02:45:20,252 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 02:45:20" (3/3) ... [2019-11-28 02:45:20,254 INFO L109 eAbstractionObserver]: Analyzing ICFG invert_string-2.c [2019-11-28 02:45:20,262 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-28 02:45:20,270 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 14 error locations. [2019-11-28 02:45:20,281 INFO L249 AbstractCegarLoop]: Starting to check reachability of 14 error locations. [2019-11-28 02:45:20,301 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-28 02:45:20,302 INFO L374 AbstractCegarLoop]: Hoare is false [2019-11-28 02:45:20,302 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-28 02:45:20,302 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-28 02:45:20,303 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-28 02:45:20,303 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-28 02:45:20,303 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-28 02:45:20,303 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-28 02:45:20,326 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states. [2019-11-28 02:45:20,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-28 02:45:20,336 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 02:45:20,336 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 02:45:20,337 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr12ENSURES_VIOLATIONMEMORY_LEAK, mainErr4REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK]=== [2019-11-28 02:45:20,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 02:45:20,342 INFO L82 PathProgramCache]: Analyzing trace with hash 1220625204, now seen corresponding path program 1 times [2019-11-28 02:45:20,349 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 02:45:20,350 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141886058] [2019-11-28 02:45:20,351 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 02:45:20,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 02:45:20,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 02:45:20,535 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 02:45:20,536 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141886058] [2019-11-28 02:45:20,537 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-28 02:45:20,537 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-28 02:45:20,538 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325225983] [2019-11-28 02:45:20,543 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-28 02:45:20,544 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 02:45:20,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-28 02:45:20,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-28 02:45:20,557 INFO L87 Difference]: Start difference. First operand 48 states. Second operand 3 states. [2019-11-28 02:45:20,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 02:45:20,668 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2019-11-28 02:45:20,669 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-28 02:45:20,671 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2019-11-28 02:45:20,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 02:45:20,682 INFO L225 Difference]: With dead ends: 48 [2019-11-28 02:45:20,682 INFO L226 Difference]: Without dead ends: 45 [2019-11-28 02:45:20,687 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-28 02:45:20,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-11-28 02:45:20,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2019-11-28 02:45:20,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2019-11-28 02:45:20,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2019-11-28 02:45:20,725 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 8 [2019-11-28 02:45:20,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 02:45:20,725 INFO L462 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2019-11-28 02:45:20,726 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-28 02:45:20,726 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2019-11-28 02:45:20,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-28 02:45:20,727 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 02:45:20,727 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 02:45:20,727 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr12ENSURES_VIOLATIONMEMORY_LEAK, mainErr4REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK]=== [2019-11-28 02:45:20,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 02:45:20,728 INFO L82 PathProgramCache]: Analyzing trace with hash 1220624894, now seen corresponding path program 1 times [2019-11-28 02:45:20,728 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 02:45:20,729 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640505151] [2019-11-28 02:45:20,729 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 02:45:20,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 02:45:20,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 02:45:20,827 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 02:45:20,828 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640505151] [2019-11-28 02:45:20,828 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-28 02:45:20,828 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-28 02:45:20,829 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415674716] [2019-11-28 02:45:20,830 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-28 02:45:20,830 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 02:45:20,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-28 02:45:20,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-28 02:45:20,831 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand 4 states. [2019-11-28 02:45:20,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 02:45:20,960 INFO L93 Difference]: Finished difference Result 41 states and 43 transitions. [2019-11-28 02:45:20,961 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-28 02:45:20,961 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2019-11-28 02:45:20,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 02:45:20,962 INFO L225 Difference]: With dead ends: 41 [2019-11-28 02:45:20,962 INFO L226 Difference]: Without dead ends: 41 [2019-11-28 02:45:20,963 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 02:45:20,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-11-28 02:45:20,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2019-11-28 02:45:20,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-11-28 02:45:20,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2019-11-28 02:45:20,971 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 8 [2019-11-28 02:45:20,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 02:45:20,971 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2019-11-28 02:45:20,971 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-28 02:45:20,972 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2019-11-28 02:45:20,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-28 02:45:20,972 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 02:45:20,972 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 02:45:20,973 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr12ENSURES_VIOLATIONMEMORY_LEAK, mainErr4REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK]=== [2019-11-28 02:45:20,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 02:45:20,974 INFO L82 PathProgramCache]: Analyzing trace with hash 1220624895, now seen corresponding path program 1 times [2019-11-28 02:45:20,974 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 02:45:20,974 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575371549] [2019-11-28 02:45:20,975 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 02:45:21,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 02:45:21,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 02:45:21,081 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 02:45:21,082 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-28 02:45:21,109 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 02:45:21 BoogieIcfgContainer [2019-11-28 02:45:21,109 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-28 02:45:21,110 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-28 02:45:21,110 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-28 02:45:21,110 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-28 02:45:21,111 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 02:45:20" (3/4) ... [2019-11-28 02:45:21,116 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-11-28 02:45:21,192 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2019-11-28 02:45:21,193 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-28 02:45:21,196 INFO L168 Benchmark]: Toolchain (without parser) took 1756.54 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 141.6 MB). Free memory was 961.7 MB in the beginning and 1.1 GB in the end (delta: -91.0 MB). Peak memory consumption was 50.6 MB. Max. memory is 11.5 GB. [2019-11-28 02:45:21,197 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 02:45:21,198 INFO L168 Benchmark]: CACSL2BoogieTranslator took 282.63 ms. Allocated memory is still 1.0 GB. Free memory was 961.7 MB in the beginning and 951.0 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2019-11-28 02:45:21,199 INFO L168 Benchmark]: Boogie Preprocessor took 97.22 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 141.6 MB). Free memory was 951.0 MB in the beginning and 1.1 GB in the end (delta: -180.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 11.5 GB. [2019-11-28 02:45:21,200 INFO L168 Benchmark]: RCFGBuilder took 424.05 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: 20.0 MB). Peak memory consumption was 20.0 MB. Max. memory is 11.5 GB. [2019-11-28 02:45:21,201 INFO L168 Benchmark]: TraceAbstraction took 863.89 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: 52.5 MB). Peak memory consumption was 52.5 MB. Max. memory is 11.5 GB. [2019-11-28 02:45:21,202 INFO L168 Benchmark]: Witness Printer took 83.20 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: 6.6 MB). Peak memory consumption was 6.6 MB. Max. memory is 11.5 GB. [2019-11-28 02:45:21,218 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 282.63 ms. Allocated memory is still 1.0 GB. Free memory was 961.7 MB in the beginning and 951.0 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 97.22 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 141.6 MB). Free memory was 951.0 MB in the beginning and 1.1 GB in the end (delta: -180.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 424.05 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: 20.0 MB). Peak memory consumption was 20.0 MB. Max. memory is 11.5 GB. * TraceAbstraction took 863.89 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: 52.5 MB). Peak memory consumption was 52.5 MB. Max. memory is 11.5 GB. * Witness Printer took 83.20 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: 6.6 MB). Peak memory consumption was 6.6 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={3:0}, str2={2:0}] [L18] COND FALSE !(i