./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 f470102c Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx12G -Xms1G -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/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 0.1.25-f470102 [2019-11-28 20:18:17,690 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-28 20:18:17,694 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-28 20:18:17,712 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-28 20:18:17,713 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-28 20:18:17,715 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-28 20:18:17,717 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-28 20:18:17,728 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-28 20:18:17,734 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-28 20:18:17,737 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-28 20:18:17,739 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-28 20:18:17,741 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-28 20:18:17,741 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-28 20:18:17,744 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-28 20:18:17,746 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-28 20:18:17,748 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-28 20:18:17,750 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-28 20:18:17,751 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-28 20:18:17,754 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-28 20:18:17,758 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-28 20:18:17,762 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-28 20:18:17,767 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-28 20:18:17,768 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-28 20:18:17,770 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-28 20:18:17,773 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-28 20:18:17,773 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-28 20:18:17,774 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-28 20:18:17,776 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-28 20:18:17,776 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-28 20:18:17,777 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-28 20:18:17,778 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-28 20:18:17,779 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-28 20:18:17,779 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-28 20:18:17,781 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-28 20:18:17,782 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-28 20:18:17,783 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-28 20:18:17,784 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-28 20:18:17,784 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-28 20:18:17,784 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-28 20:18:17,785 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-28 20:18:17,787 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-28 20:18:17,788 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2019-11-28 20:18:17,823 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-28 20:18:17,825 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-28 20:18:17,828 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-28 20:18:17,830 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-28 20:18:17,831 INFO L138 SettingsManager]: * Use SBE=true [2019-11-28 20:18:17,831 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-28 20:18:17,831 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-28 20:18:17,832 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-11-28 20:18:17,832 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-28 20:18:17,832 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-28 20:18:17,833 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-28 20:18:17,833 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2019-11-28 20:18:17,834 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2019-11-28 20:18:17,834 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2019-11-28 20:18:17,835 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-28 20:18:17,835 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-28 20:18:17,835 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-28 20:18:17,836 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-28 20:18:17,836 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-28 20:18:17,836 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-28 20:18:17,836 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-28 20:18:17,837 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-28 20:18:17,837 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-28 20:18:17,838 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-28 20:18:17,838 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-28 20:18:17,838 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-28 20:18:17,838 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-28 20:18:17,839 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-11-28 20:18:17,839 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 20:18:18,185 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-28 20:18:18,207 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-28 20:18:18,212 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-28 20:18:18,213 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-28 20:18:18,214 INFO L275 PluginConnector]: CDTParser initialized [2019-11-28 20:18:18,215 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops/invert_string-2.c [2019-11-28 20:18:18,291 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8fda17bea/f306735dea464363b0c3676ba9cfc048/FLAG2ccec85cd [2019-11-28 20:18:18,739 INFO L306 CDTParser]: Found 1 translation units. [2019-11-28 20:18:18,740 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops/invert_string-2.c [2019-11-28 20:18:18,745 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8fda17bea/f306735dea464363b0c3676ba9cfc048/FLAG2ccec85cd [2019-11-28 20:18:19,111 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8fda17bea/f306735dea464363b0c3676ba9cfc048 [2019-11-28 20:18:19,114 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-28 20:18:19,116 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-28 20:18:19,117 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-28 20:18:19,117 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-28 20:18:19,122 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-28 20:18:19,123 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 08:18:19" (1/1) ... [2019-11-28 20:18:19,126 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ed6449a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:18:19, skipping insertion in model container [2019-11-28 20:18:19,127 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 08:18:19" (1/1) ... [2019-11-28 20:18:19,135 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-28 20:18:19,156 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-28 20:18:19,410 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-28 20:18:19,416 INFO L203 MainTranslator]: Completed pre-run [2019-11-28 20:18:19,455 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-28 20:18:19,481 INFO L208 MainTranslator]: Completed translation [2019-11-28 20:18:19,481 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:18:19 WrapperNode [2019-11-28 20:18:19,482 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-28 20:18:19,483 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-28 20:18:19,483 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-28 20:18:19,484 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-28 20:18:19,556 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:18:19" (1/1) ... [2019-11-28 20:18:19,556 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:18:19" (1/1) ... [2019-11-28 20:18:19,566 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:18:19" (1/1) ... [2019-11-28 20:18:19,566 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:18:19" (1/1) ... [2019-11-28 20:18:19,574 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:18:19" (1/1) ... [2019-11-28 20:18:19,580 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:18:19" (1/1) ... [2019-11-28 20:18:19,582 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:18:19" (1/1) ... [2019-11-28 20:18:19,584 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-28 20:18:19,585 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-28 20:18:19,585 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-28 20:18:19,585 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-28 20:18:19,586 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:18:19" (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 20:18:19,651 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-28 20:18:19,652 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-28 20:18:19,652 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-11-28 20:18:19,652 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-28 20:18:19,653 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-28 20:18:19,653 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-11-28 20:18:19,653 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2019-11-28 20:18:19,653 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2019-11-28 20:18:19,654 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-28 20:18:19,654 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-28 20:18:19,654 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-28 20:18:19,654 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-28 20:18:19,655 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-28 20:18:19,655 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-28 20:18:19,655 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-28 20:18:20,003 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-28 20:18:20,003 INFO L287 CfgBuilder]: Removed 3 assume(true) statements. [2019-11-28 20:18:20,005 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 08:18:20 BoogieIcfgContainer [2019-11-28 20:18:20,005 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-28 20:18:20,006 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-28 20:18:20,006 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-28 20:18:20,010 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-28 20:18:20,010 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 08:18:19" (1/3) ... [2019-11-28 20:18:20,011 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@362f6369 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 08:18:20, skipping insertion in model container [2019-11-28 20:18:20,012 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:18:19" (2/3) ... [2019-11-28 20:18:20,012 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@362f6369 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 08:18:20, skipping insertion in model container [2019-11-28 20:18:20,012 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 08:18:20" (3/3) ... [2019-11-28 20:18:20,014 INFO L109 eAbstractionObserver]: Analyzing ICFG invert_string-2.c [2019-11-28 20:18:20,025 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-28 20:18:20,037 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 13 error locations. [2019-11-28 20:18:20,049 INFO L249 AbstractCegarLoop]: Starting to check reachability of 13 error locations. [2019-11-28 20:18:20,069 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-28 20:18:20,069 INFO L374 AbstractCegarLoop]: Hoare is false [2019-11-28 20:18:20,069 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-28 20:18:20,069 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-28 20:18:20,070 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-28 20:18:20,070 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-28 20:18:20,070 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-28 20:18:20,070 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-28 20:18:20,087 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states. [2019-11-28 20:18:20,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-28 20:18:20,095 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 20:18:20,096 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 20:18:20,097 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]=== [2019-11-28 20:18:20,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 20:18:20,103 INFO L82 PathProgramCache]: Analyzing trace with hash -523138443, now seen corresponding path program 1 times [2019-11-28 20:18:20,110 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 20:18:20,110 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133933585] [2019-11-28 20:18:20,110 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 20:18:20,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 20:18:20,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 20:18:20,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 20:18:20,291 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133933585] [2019-11-28 20:18:20,293 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-28 20:18:20,293 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-28 20:18:20,294 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190942944] [2019-11-28 20:18:20,299 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-28 20:18:20,299 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 20:18:20,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-28 20:18:20,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-28 20:18:20,313 INFO L87 Difference]: Start difference. First operand 47 states. Second operand 3 states. [2019-11-28 20:18:20,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 20:18:20,480 INFO L93 Difference]: Finished difference Result 47 states and 49 transitions. [2019-11-28 20:18:20,481 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-28 20:18:20,482 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2019-11-28 20:18:20,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 20:18:20,491 INFO L225 Difference]: With dead ends: 47 [2019-11-28 20:18:20,491 INFO L226 Difference]: Without dead ends: 43 [2019-11-28 20:18:20,494 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 20:18:20,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-11-28 20:18:20,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2019-11-28 20:18:20,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-11-28 20:18:20,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2019-11-28 20:18:20,535 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 8 [2019-11-28 20:18:20,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 20:18:20,536 INFO L462 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2019-11-28 20:18:20,536 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-28 20:18:20,536 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2019-11-28 20:18:20,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-28 20:18:20,537 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 20:18:20,537 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 20:18:20,537 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]=== [2019-11-28 20:18:20,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 20:18:20,538 INFO L82 PathProgramCache]: Analyzing trace with hash -523138753, now seen corresponding path program 1 times [2019-11-28 20:18:20,538 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 20:18:20,539 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316466497] [2019-11-28 20:18:20,539 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 20:18:20,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 20:18:20,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 20:18:20,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 20:18:20,658 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316466497] [2019-11-28 20:18:20,658 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-28 20:18:20,658 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-28 20:18:20,659 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347029959] [2019-11-28 20:18:20,660 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-28 20:18:20,660 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 20:18:20,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-28 20:18:20,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-28 20:18:20,661 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand 4 states. [2019-11-28 20:18:20,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 20:18:20,789 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2019-11-28 20:18:20,789 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-28 20:18:20,789 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2019-11-28 20:18:20,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 20:18:20,790 INFO L225 Difference]: With dead ends: 39 [2019-11-28 20:18:20,790 INFO L226 Difference]: Without dead ends: 39 [2019-11-28 20:18:20,791 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-28 20:18:20,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-11-28 20:18:20,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2019-11-28 20:18:20,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-11-28 20:18:20,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2019-11-28 20:18:20,797 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 8 [2019-11-28 20:18:20,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 20:18:20,798 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2019-11-28 20:18:20,798 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-28 20:18:20,798 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2019-11-28 20:18:20,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-28 20:18:20,799 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 20:18:20,799 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 20:18:20,799 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]=== [2019-11-28 20:18:20,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 20:18:20,800 INFO L82 PathProgramCache]: Analyzing trace with hash -523138752, now seen corresponding path program 1 times [2019-11-28 20:18:20,800 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 20:18:20,800 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064566240] [2019-11-28 20:18:20,800 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 20:18:20,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 20:18:20,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 20:18:20,869 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 20:18:20,870 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-28 20:18:20,892 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 08:18:20 BoogieIcfgContainer [2019-11-28 20:18:20,893 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-28 20:18:20,893 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-28 20:18:20,893 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-28 20:18:20,893 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-28 20:18:20,894 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 08:18:20" (3/4) ... [2019-11-28 20:18:20,897 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-11-28 20:18:20,937 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2019-11-28 20:18:20,937 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-28 20:18:20,939 INFO L168 Benchmark]: Toolchain (without parser) took 1822.97 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 154.1 MB). Free memory was 961.7 MB in the beginning and 1.1 GB in the end (delta: -105.5 MB). Peak memory consumption was 48.6 MB. Max. memory is 11.5 GB. [2019-11-28 20:18:20,940 INFO L168 Benchmark]: CDTParser took 0.36 ms. Allocated memory is still 1.0 GB. Free memory is still 987.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-28 20:18:20,941 INFO L168 Benchmark]: CACSL2BoogieTranslator took 365.23 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 20:18:20,942 INFO L168 Benchmark]: Boogie Preprocessor took 102.20 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 154.1 MB). Free memory was 951.0 MB in the beginning and 1.1 GB in the end (delta: -192.1 MB). Peak memory consumption was 9.7 MB. Max. memory is 11.5 GB. [2019-11-28 20:18:20,943 INFO L168 Benchmark]: RCFGBuilder took 420.31 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: 18.0 MB). Peak memory consumption was 18.0 MB. Max. memory is 11.5 GB. [2019-11-28 20:18:20,943 INFO L168 Benchmark]: TraceAbstraction took 886.52 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: 51.5 MB). Peak memory consumption was 51.5 MB. Max. memory is 11.5 GB. [2019-11-28 20:18:20,944 INFO L168 Benchmark]: Witness Printer took 43.71 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: 6.4 MB). Peak memory consumption was 6.4 MB. Max. memory is 11.5 GB. [2019-11-28 20:18:20,948 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.36 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 365.23 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 102.20 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 154.1 MB). Free memory was 951.0 MB in the beginning and 1.1 GB in the end (delta: -192.1 MB). Peak memory consumption was 9.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 420.31 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: 18.0 MB). Peak memory consumption was 18.0 MB. Max. memory is 11.5 GB. * TraceAbstraction took 886.52 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: 51.5 MB). Peak memory consumption was 51.5 MB. Max. memory is 11.5 GB. * Witness Printer took 43.71 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: 6.4 MB). Peak memory consumption was 6.4 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