./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/verifythis/lcp.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 6b5699aa Using bit-precise analysis Retrying with bit-precise analysis 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/verifythis/lcp.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.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 17e6e52dd20f9be422d05cd630fd9252ae3011a2 ....................................................................................................................................................................................................................................................................................................... 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 --- Skipped default analysis because property is memsafety ### Bit-precise run ### This is Ultimate 0.1.24-6b5699a [2019-11-21 21:57:59,479 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-21 21:57:59,481 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-21 21:57:59,494 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-21 21:57:59,495 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-21 21:57:59,496 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-21 21:57:59,498 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-21 21:57:59,500 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-21 21:57:59,502 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-21 21:57:59,503 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-21 21:57:59,504 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-21 21:57:59,505 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-21 21:57:59,506 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-21 21:57:59,507 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-21 21:57:59,508 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-21 21:57:59,509 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-21 21:57:59,510 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-21 21:57:59,511 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-21 21:57:59,513 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-21 21:57:59,515 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-21 21:57:59,516 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-21 21:57:59,517 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-21 21:57:59,518 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-21 21:57:59,519 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-21 21:57:59,522 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-21 21:57:59,522 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-21 21:57:59,522 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-21 21:57:59,523 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-21 21:57:59,524 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-21 21:57:59,525 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-21 21:57:59,525 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-21 21:57:59,526 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-21 21:57:59,527 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-21 21:57:59,528 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-21 21:57:59,529 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-21 21:57:59,529 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-21 21:57:59,530 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-21 21:57:59,530 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-21 21:57:59,530 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-21 21:57:59,531 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-21 21:57:59,532 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-21 21:57:59,533 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2019-11-21 21:57:59,547 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-21 21:57:59,547 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-21 21:57:59,549 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-21 21:57:59,549 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-21 21:57:59,549 INFO L138 SettingsManager]: * Use SBE=true [2019-11-21 21:57:59,550 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-21 21:57:59,550 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-21 21:57:59,550 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-11-21 21:57:59,551 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-21 21:57:59,551 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-21 21:57:59,551 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-21 21:57:59,551 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2019-11-21 21:57:59,552 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2019-11-21 21:57:59,552 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2019-11-21 21:57:59,552 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-21 21:57:59,552 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-21 21:57:59,553 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2019-11-21 21:57:59,553 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2019-11-21 21:57:59,553 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-21 21:57:59,553 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-21 21:57:59,554 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-21 21:57:59,554 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-21 21:57:59,554 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-21 21:57:59,555 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-21 21:57:59,555 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-21 21:57:59,555 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-21 21:57:59,555 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-21 21:57:59,556 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2019-11-21 21:57:59,556 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2019-11-21 21:57:59,556 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-21 21:57:59,557 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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 -> 17e6e52dd20f9be422d05cd630fd9252ae3011a2 [2019-11-21 21:57:59,884 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-21 21:57:59,896 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-21 21:57:59,899 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-21 21:57:59,901 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-21 21:57:59,901 INFO L275 PluginConnector]: CDTParser initialized [2019-11-21 21:57:59,902 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/verifythis/lcp.c [2019-11-21 21:57:59,959 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a5fa097f2/9011f10ca02641ca86e5cfca091b4b61/FLAGc3f44b75f [2019-11-21 21:58:00,379 INFO L306 CDTParser]: Found 1 translation units. [2019-11-21 21:58:00,380 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/verifythis/lcp.c [2019-11-21 21:58:00,388 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a5fa097f2/9011f10ca02641ca86e5cfca091b4b61/FLAGc3f44b75f [2019-11-21 21:58:00,769 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a5fa097f2/9011f10ca02641ca86e5cfca091b4b61 [2019-11-21 21:58:00,772 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-21 21:58:00,773 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-21 21:58:00,774 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-21 21:58:00,775 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-21 21:58:00,778 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-21 21:58:00,779 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 09:58:00" (1/1) ... [2019-11-21 21:58:00,782 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b7d6822 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:58:00, skipping insertion in model container [2019-11-21 21:58:00,782 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 09:58:00" (1/1) ... [2019-11-21 21:58:00,789 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-21 21:58:00,807 INFO L179 MainTranslator]: Built tables and reachable declarations [2019-11-21 21:58:00,990 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-21 21:58:01,006 INFO L201 MainTranslator]: Completed pre-run [2019-11-21 21:58:01,030 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-21 21:58:01,153 INFO L205 MainTranslator]: Completed translation [2019-11-21 21:58:01,153 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:58:01 WrapperNode [2019-11-21 21:58:01,154 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-21 21:58:01,154 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-21 21:58:01,155 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-21 21:58:01,155 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-21 21:58:01,169 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:58:01" (1/1) ... [2019-11-21 21:58:01,169 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:58:01" (1/1) ... [2019-11-21 21:58:01,181 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:58:01" (1/1) ... [2019-11-21 21:58:01,182 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:58:01" (1/1) ... [2019-11-21 21:58:01,193 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:58:01" (1/1) ... [2019-11-21 21:58:01,198 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:58:01" (1/1) ... [2019-11-21 21:58:01,200 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:58:01" (1/1) ... [2019-11-21 21:58:01,203 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-21 21:58:01,204 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-21 21:58:01,204 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-21 21:58:01,204 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-21 21:58:01,205 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:58:01" (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 [2019-11-21 21:58:01,290 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-21 21:58:01,291 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-21 21:58:01,291 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-11-21 21:58:01,291 INFO L138 BoogieDeclarations]: Found implementation of procedure lcp [2019-11-21 21:58:01,292 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2019-11-21 21:58:01,292 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-21 21:58:01,292 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2019-11-21 21:58:01,292 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2019-11-21 21:58:01,293 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-11-21 21:58:01,293 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-21 21:58:01,293 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-11-21 21:58:01,293 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-21 21:58:01,294 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-11-21 21:58:01,294 INFO L130 BoogieDeclarations]: Found specification of procedure lcp [2019-11-21 21:58:01,295 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2019-11-21 21:58:01,295 INFO L130 BoogieDeclarations]: Found specification of procedure check [2019-11-21 21:58:01,295 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-21 21:58:01,295 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-21 21:58:01,295 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2019-11-21 21:58:01,295 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-21 21:58:01,296 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-21 21:58:01,296 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-21 21:58:01,296 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2019-11-21 21:58:01,862 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-21 21:58:01,863 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-21 21:58:01,864 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 09:58:01 BoogieIcfgContainer [2019-11-21 21:58:01,864 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-21 21:58:01,865 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-21 21:58:01,865 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-21 21:58:01,869 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-21 21:58:01,869 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 09:58:00" (1/3) ... [2019-11-21 21:58:01,870 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4841e71d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 09:58:01, skipping insertion in model container [2019-11-21 21:58:01,870 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:58:01" (2/3) ... [2019-11-21 21:58:01,870 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4841e71d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 09:58:01, skipping insertion in model container [2019-11-21 21:58:01,870 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 09:58:01" (3/3) ... [2019-11-21 21:58:01,872 INFO L109 eAbstractionObserver]: Analyzing ICFG lcp.c [2019-11-21 21:58:01,882 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-21 21:58:01,890 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 16 error locations. [2019-11-21 21:58:01,902 INFO L249 AbstractCegarLoop]: Starting to check reachability of 16 error locations. [2019-11-21 21:58:01,923 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-21 21:58:01,923 INFO L374 AbstractCegarLoop]: Hoare is false [2019-11-21 21:58:01,924 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-21 21:58:01,924 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-21 21:58:01,924 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-21 21:58:01,924 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-21 21:58:01,924 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-21 21:58:01,924 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-21 21:58:01,943 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states. [2019-11-21 21:58:01,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-21 21:58:01,953 INFO L402 BasicCegarLoop]: Found error trace [2019-11-21 21:58:01,954 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-21 21:58:01,955 INFO L410 AbstractCegarLoop]: === Iteration 1 === [lcpErr3REQUIRES_VIOLATION, lcpErr2REQUIRES_VIOLATION, lcpErr1REQUIRES_VIOLATION, lcpErr0REQUIRES_VIOLATION, mainErr0ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr3ENSURES_VIOLATIONMEMORY_LEAK, mainErr1ASSERT_VIOLATIONMEMORY_FREE, checkErr2REQUIRES_VIOLATION, checkErr3REQUIRES_VIOLATION, checkErr4REQUIRES_VIOLATION, checkErr5REQUIRES_VIOLATION, checkErr0REQUIRES_VIOLATION, checkErr6REQUIRES_VIOLATION, checkErr1REQUIRES_VIOLATION, checkErr7REQUIRES_VIOLATION]=== [2019-11-21 21:58:01,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-21 21:58:01,961 INFO L82 PathProgramCache]: Analyzing trace with hash 992921340, now seen corresponding path program 1 times [2019-11-21 21:58:01,973 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-21 21:58:01,974 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1657698741] [2019-11-21 21:58:01,974 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 2 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-21 21:58:02,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-21 21:58:02,112 INFO L255 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-21 21:58:02,118 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-21 21:58:02,182 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-11-21 21:58:02,183 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-21 21:58:02,193 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-21 21:58:02,193 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-21 21:58:02,194 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2019-11-21 21:58:02,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-21 21:58:02,265 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-21 21:58:02,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-21 21:58:02,313 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1657698741] [2019-11-21 21:58:02,314 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-21 21:58:02,315 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 5] imperfect sequences [] total 6 [2019-11-21 21:58:02,320 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938735056] [2019-11-21 21:58:02,325 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-21 21:58:02,326 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-21 21:58:02,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-21 21:58:02,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-21 21:58:02,345 INFO L87 Difference]: Start difference. First operand 63 states. Second operand 7 states. [2019-11-21 21:58:02,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-21 21:58:02,769 INFO L93 Difference]: Finished difference Result 60 states and 63 transitions. [2019-11-21 21:58:02,769 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-21 21:58:02,771 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 16 [2019-11-21 21:58:02,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-21 21:58:02,780 INFO L225 Difference]: With dead ends: 60 [2019-11-21 21:58:02,780 INFO L226 Difference]: Without dead ends: 57 [2019-11-21 21:58:02,782 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-11-21 21:58:02,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2019-11-21 21:58:02,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2019-11-21 21:58:02,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-11-21 21:58:02,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 60 transitions. [2019-11-21 21:58:02,824 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 60 transitions. Word has length 16 [2019-11-21 21:58:02,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-21 21:58:02,824 INFO L462 AbstractCegarLoop]: Abstraction has 57 states and 60 transitions. [2019-11-21 21:58:02,825 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-21 21:58:02,825 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 60 transitions. [2019-11-21 21:58:02,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-21 21:58:02,826 INFO L402 BasicCegarLoop]: Found error trace [2019-11-21 21:58:02,826 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-21 21:58:03,028 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-21 21:58:03,031 INFO L410 AbstractCegarLoop]: === Iteration 2 === [lcpErr3REQUIRES_VIOLATION, lcpErr2REQUIRES_VIOLATION, lcpErr1REQUIRES_VIOLATION, lcpErr0REQUIRES_VIOLATION, mainErr0ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr3ENSURES_VIOLATIONMEMORY_LEAK, mainErr1ASSERT_VIOLATIONMEMORY_FREE, checkErr2REQUIRES_VIOLATION, checkErr3REQUIRES_VIOLATION, checkErr4REQUIRES_VIOLATION, checkErr5REQUIRES_VIOLATION, checkErr0REQUIRES_VIOLATION, checkErr6REQUIRES_VIOLATION, checkErr1REQUIRES_VIOLATION, checkErr7REQUIRES_VIOLATION]=== [2019-11-21 21:58:03,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-21 21:58:03,032 INFO L82 PathProgramCache]: Analyzing trace with hash 992921341, now seen corresponding path program 1 times [2019-11-21 21:58:03,033 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-21 21:58:03,034 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [948598936] [2019-11-21 21:58:03,034 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 3 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-21 21:58:03,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-21 21:58:03,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-21 21:58:03,247 INFO L174 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2019-11-21 21:58:03,247 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-21 21:58:03,451 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-21 21:58:03,480 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.11 09:58:03 BoogieIcfgContainer [2019-11-21 21:58:03,480 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-21 21:58:03,481 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-21 21:58:03,481 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-21 21:58:03,481 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-21 21:58:03,482 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 09:58:01" (3/4) ... [2019-11-21 21:58:03,484 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-11-21 21:58:03,534 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2019-11-21 21:58:03,534 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-21 21:58:03,536 INFO L168 Benchmark]: Toolchain (without parser) took 2763.09 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 168.8 MB). Free memory was 957.7 MB in the beginning and 1.1 GB in the end (delta: -92.7 MB). Peak memory consumption was 76.2 MB. Max. memory is 11.5 GB. [2019-11-21 21:58:03,537 INFO L168 Benchmark]: CDTParser took 0.25 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. [2019-11-21 21:58:03,538 INFO L168 Benchmark]: CACSL2BoogieTranslator took 379.71 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 168.8 MB). Free memory was 957.7 MB in the beginning and 1.2 GB in the end (delta: -207.4 MB). Peak memory consumption was 20.8 MB. Max. memory is 11.5 GB. [2019-11-21 21:58:03,539 INFO L168 Benchmark]: Boogie Preprocessor took 48.86 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 6.6 MB). Peak memory consumption was 6.6 MB. Max. memory is 11.5 GB. [2019-11-21 21:58:03,539 INFO L168 Benchmark]: RCFGBuilder took 660.64 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 25.8 MB). Peak memory consumption was 25.8 MB. Max. memory is 11.5 GB. [2019-11-21 21:58:03,540 INFO L168 Benchmark]: TraceAbstraction took 1615.36 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: 75.8 MB). Peak memory consumption was 75.8 MB. Max. memory is 11.5 GB. [2019-11-21 21:58:03,541 INFO L168 Benchmark]: Witness Printer took 53.66 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. [2019-11-21 21:58:03,545 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 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 379.71 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 168.8 MB). Free memory was 957.7 MB in the beginning and 1.2 GB in the end (delta: -207.4 MB). Peak memory consumption was 20.8 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 48.86 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 6.6 MB). Peak memory consumption was 6.6 MB. Max. memory is 11.5 GB. * RCFGBuilder took 660.64 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 25.8 MB). Peak memory consumption was 25.8 MB. Max. memory is 11.5 GB. * TraceAbstraction took 1615.36 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: 75.8 MB). Peak memory consumption was 75.8 MB. Max. memory is 11.5 GB. * Witness Printer took 53.66 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: 13]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L31] int n = __VERIFIER_nondet_int(); [L34] EXPR, FCALL calloc(n, sizeof(int)) VAL [calloc(n, sizeof(int))={1:0}, n=805306369] [L34] int *a = calloc(n, sizeof(int)); [L36] int x = __VERIFIER_nondet_int(); [L37] int y = __VERIFIER_nondet_int(); [L39] CALL lcp(a, n, x, y) VAL [\old(n)=805306369, \old(x)=536870925, \old(y)=805306368, a={1:0}] [L12] int l = 0; VAL [\old(n)=805306369, \old(x)=536870925, \old(y)=805306368, a={1:0}, a={1:0}, l=0, n=805306369, x=536870925, y=805306368] [L13] x+l