./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/ldv-memsafety/memset2_-write.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 906a4fb5 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/ldv-memsafety/memset2_-write.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 504b8754db5656e557502f2f9e958956c9b0cd94 .................................................................................................................................................................................................................................................................... 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 0.1.25-906a4fb [2020-10-19 18:11:22,602 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-19 18:11:22,608 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-19 18:11:22,637 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-19 18:11:22,637 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-19 18:11:22,638 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-19 18:11:22,640 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-19 18:11:22,641 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-19 18:11:22,643 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-19 18:11:22,644 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-19 18:11:22,645 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-19 18:11:22,646 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-19 18:11:22,646 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-19 18:11:22,647 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-19 18:11:22,648 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-19 18:11:22,649 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-19 18:11:22,650 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-19 18:11:22,651 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-19 18:11:22,653 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-19 18:11:22,655 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-19 18:11:22,656 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-19 18:11:22,657 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-19 18:11:22,658 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-19 18:11:22,659 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-19 18:11:22,662 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-19 18:11:22,662 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-19 18:11:22,662 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-19 18:11:22,663 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-19 18:11:22,663 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-19 18:11:22,664 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-19 18:11:22,664 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-19 18:11:22,665 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-19 18:11:22,666 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-19 18:11:22,667 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-19 18:11:22,668 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-19 18:11:22,668 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-19 18:11:22,669 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-19 18:11:22,669 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-19 18:11:22,669 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-19 18:11:22,670 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-19 18:11:22,671 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-19 18:11:22,671 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2020-10-19 18:11:22,713 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-19 18:11:22,713 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-19 18:11:22,714 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-19 18:11:22,715 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-19 18:11:22,715 INFO L138 SettingsManager]: * Use SBE=true [2020-10-19 18:11:22,715 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-19 18:11:22,715 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-19 18:11:22,715 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-10-19 18:11:22,716 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-19 18:11:22,716 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-19 18:11:22,716 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-19 18:11:22,716 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-10-19 18:11:22,716 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-10-19 18:11:22,717 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-10-19 18:11:22,717 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-19 18:11:22,717 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-10-19 18:11:22,717 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-19 18:11:22,718 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-19 18:11:22,718 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-19 18:11:22,718 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-19 18:11:22,718 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-19 18:11:22,718 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-19 18:11:22,719 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-19 18:11:22,719 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-19 18:11:22,719 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-19 18:11:22,719 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-19 18:11:22,720 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-19 18:11:22,720 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-19 18:11:22,720 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 -> 504b8754db5656e557502f2f9e958956c9b0cd94 [2020-10-19 18:11:23,026 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-19 18:11:23,037 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-19 18:11:23,041 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-19 18:11:23,042 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-19 18:11:23,043 INFO L275 PluginConnector]: CDTParser initialized [2020-10-19 18:11:23,044 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-memsafety/memset2_-write.c [2020-10-19 18:11:23,100 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aae54394c/4d2e4b6288374c0b9300b6fcf7b3c974/FLAG525601b82 [2020-10-19 18:11:23,488 INFO L306 CDTParser]: Found 1 translation units. [2020-10-19 18:11:23,489 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-memsafety/memset2_-write.c [2020-10-19 18:11:23,497 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aae54394c/4d2e4b6288374c0b9300b6fcf7b3c974/FLAG525601b82 [2020-10-19 18:11:23,845 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aae54394c/4d2e4b6288374c0b9300b6fcf7b3c974 [2020-10-19 18:11:23,849 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-19 18:11:23,856 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-19 18:11:23,857 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-19 18:11:23,857 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-19 18:11:23,861 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-19 18:11:23,862 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.10 06:11:23" (1/1) ... [2020-10-19 18:11:23,865 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@639c7452 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:11:23, skipping insertion in model container [2020-10-19 18:11:23,865 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.10 06:11:23" (1/1) ... [2020-10-19 18:11:23,873 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-19 18:11:23,893 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-19 18:11:24,093 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-19 18:11:24,101 INFO L203 MainTranslator]: Completed pre-run [2020-10-19 18:11:24,116 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-19 18:11:24,130 INFO L208 MainTranslator]: Completed translation [2020-10-19 18:11:24,131 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:11:24 WrapperNode [2020-10-19 18:11:24,131 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-19 18:11:24,132 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-19 18:11:24,132 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-19 18:11:24,132 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-19 18:11:24,143 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:11:24" (1/1) ... [2020-10-19 18:11:24,143 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:11:24" (1/1) ... [2020-10-19 18:11:24,150 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:11:24" (1/1) ... [2020-10-19 18:11:24,150 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:11:24" (1/1) ... [2020-10-19 18:11:24,155 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:11:24" (1/1) ... [2020-10-19 18:11:24,160 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:11:24" (1/1) ... [2020-10-19 18:11:24,161 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:11:24" (1/1) ... [2020-10-19 18:11:24,218 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-19 18:11:24,219 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-19 18:11:24,219 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-19 18:11:24,219 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-19 18:11:24,223 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:11:24" (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 [2020-10-19 18:11:24,286 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-19 18:11:24,286 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-19 18:11:24,286 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-19 18:11:24,287 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2020-10-19 18:11:24,287 INFO L130 BoogieDeclarations]: Found specification of procedure memset [2020-10-19 18:11:24,287 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-19 18:11:24,287 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-19 18:11:24,287 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2020-10-19 18:11:24,288 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-19 18:11:24,288 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-19 18:11:24,289 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-19 18:11:24,417 WARN L798 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2020-10-19 18:11:24,510 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-19 18:11:24,511 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-19 18:11:24,515 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 06:11:24 BoogieIcfgContainer [2020-10-19 18:11:24,516 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-19 18:11:24,519 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-19 18:11:24,520 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-19 18:11:24,524 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-19 18:11:24,524 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.10 06:11:23" (1/3) ... [2020-10-19 18:11:24,525 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45a49b54 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.10 06:11:24, skipping insertion in model container [2020-10-19 18:11:24,526 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:11:24" (2/3) ... [2020-10-19 18:11:24,527 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45a49b54 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.10 06:11:24, skipping insertion in model container [2020-10-19 18:11:24,527 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 06:11:24" (3/3) ... [2020-10-19 18:11:24,531 INFO L111 eAbstractionObserver]: Analyzing ICFG memset2_-write.c [2020-10-19 18:11:24,544 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-19 18:11:24,552 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2020-10-19 18:11:24,569 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-10-19 18:11:24,593 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-19 18:11:24,594 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-19 18:11:24,594 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-19 18:11:24,594 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-19 18:11:24,595 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-19 18:11:24,595 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-19 18:11:24,595 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-19 18:11:24,595 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-19 18:11:24,616 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-10-19 18:11:24,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-10-19 18:11:24,630 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:11:24,631 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:11:24,632 INFO L429 AbstractCegarLoop]: === Iteration 1 === [mainErr2ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-10-19 18:11:24,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:11:24,639 INFO L82 PathProgramCache]: Analyzing trace with hash -1092847368, now seen corresponding path program 1 times [2020-10-19 18:11:24,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:11:24,651 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386557852] [2020-10-19 18:11:24,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:11:24,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:11:24,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:11:24,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:11:24,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:11:24,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386557852] [2020-10-19 18:11:24,838 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:11:24,839 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-19 18:11:24,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079649612] [2020-10-19 18:11:24,844 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:11:24,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:11:24,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:11:24,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:11:24,864 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 4 states. [2020-10-19 18:11:25,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:11:25,020 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2020-10-19 18:11:25,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:11:25,022 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2020-10-19 18:11:25,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:11:25,031 INFO L225 Difference]: With dead ends: 19 [2020-10-19 18:11:25,031 INFO L226 Difference]: Without dead ends: 16 [2020-10-19 18:11:25,033 INFO L677 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 [2020-10-19 18:11:25,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-10-19 18:11:25,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-10-19 18:11:25,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-19 18:11:25,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2020-10-19 18:11:25,068 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 7 [2020-10-19 18:11:25,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:11:25,068 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2020-10-19 18:11:25,068 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:11:25,068 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2020-10-19 18:11:25,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-10-19 18:11:25,069 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:11:25,069 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:11:25,069 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-19 18:11:25,070 INFO L429 AbstractCegarLoop]: === Iteration 2 === [mainErr2ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-10-19 18:11:25,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:11:25,070 INFO L82 PathProgramCache]: Analyzing trace with hash -1092847367, now seen corresponding path program 1 times [2020-10-19 18:11:25,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:11:25,071 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668886057] [2020-10-19 18:11:25,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:11:25,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:11:25,088 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:11:25,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:11:25,099 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:11:25,126 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 18:11:25,126 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-19 18:11:25,127 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-19 18:11:25,146 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.10 06:11:25 BoogieIcfgContainer [2020-10-19 18:11:25,146 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-19 18:11:25,147 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-19 18:11:25,147 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-19 18:11:25,147 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-19 18:11:25,148 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 06:11:24" (3/4) ... [2020-10-19 18:11:25,150 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-10-19 18:11:25,189 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-19 18:11:25,189 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-19 18:11:25,192 INFO L168 Benchmark]: Toolchain (without parser) took 1340.71 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 130.0 MB). Free memory was 960.0 MB in the beginning and 1.1 GB in the end (delta: -112.2 MB). Peak memory consumption was 17.8 MB. Max. memory is 11.5 GB. [2020-10-19 18:11:25,193 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 1.0 GB. Free memory is still 985.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2020-10-19 18:11:25,194 INFO L168 Benchmark]: CACSL2BoogieTranslator took 274.26 ms. Allocated memory is still 1.0 GB. Free memory was 960.0 MB in the beginning and 949.2 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2020-10-19 18:11:25,195 INFO L168 Benchmark]: Boogie Preprocessor took 87.03 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 130.0 MB). Free memory was 949.2 MB in the beginning and 1.1 GB in the end (delta: -183.5 MB). Peak memory consumption was 15.2 MB. Max. memory is 11.5 GB. [2020-10-19 18:11:25,196 INFO L168 Benchmark]: RCFGBuilder took 298.77 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: 27.1 MB). Peak memory consumption was 27.1 MB. Max. memory is 11.5 GB. [2020-10-19 18:11:25,196 INFO L168 Benchmark]: TraceAbstraction took 626.98 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: 33.5 MB). Peak memory consumption was 33.5 MB. Max. memory is 11.5 GB. [2020-10-19 18:11:25,197 INFO L168 Benchmark]: Witness Printer took 42.48 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2020-10-19 18:11:25,201 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30 ms. Allocated memory is still 1.0 GB. Free memory is still 985.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 274.26 ms. Allocated memory is still 1.0 GB. Free memory was 960.0 MB in the beginning and 949.2 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 87.03 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 130.0 MB). Free memory was 949.2 MB in the beginning and 1.1 GB in the end (delta: -183.5 MB). Peak memory consumption was 15.2 MB. Max. memory is 11.5 GB. * RCFGBuilder took 298.77 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: 27.1 MB). Peak memory consumption was 27.1 MB. Max. memory is 11.5 GB. * TraceAbstraction took 626.98 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: 33.5 MB). Peak memory consumption was 33.5 MB. Max. memory is 11.5 GB. * Witness Printer took 42.48 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 22]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L21] struct compstat cstats ; VAL [cstats={2:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.5s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 13 SDtfs, 6 SDslu, 8 SDs, 0 SdLazy, 24 SolverSat, 3 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=20occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 14 NumberOfCodeBlocks, 14 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 6 ConstructedInterpolants, 0 QuantifiedInterpolants, 114 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...