./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/count_down_unsafe.i --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/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_9f5a374e-5fbd-49b1-a74e-d37a01d0fdb5/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_9f5a374e-5fbd-49b1-a74e-d37a01d0fdb5/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_9f5a374e-5fbd-49b1-a74e-d37a01d0fdb5/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_9f5a374e-5fbd-49b1-a74e-d37a01d0fdb5/bin/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/count_down_unsafe.i -s /tmp/vcloud-vcloud-master/worker/run_dir_9f5a374e-5fbd-49b1-a74e-d37a01d0fdb5/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_9f5a374e-5fbd-49b1-a74e-d37a01d0fdb5/bin/utaipan --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 744113fc2ef40828e0832f07c1176e726449b166 ................................................................................................................................................................................................................................................................................................................................................ 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 [2019-11-26 02:55:28,467 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-26 02:55:28,469 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-26 02:55:28,482 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-26 02:55:28,483 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-26 02:55:28,484 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-26 02:55:28,486 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-26 02:55:28,495 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-26 02:55:28,499 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-26 02:55:28,503 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-26 02:55:28,504 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-26 02:55:28,505 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-26 02:55:28,505 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-26 02:55:28,508 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-26 02:55:28,509 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-26 02:55:28,510 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-26 02:55:28,511 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-26 02:55:28,511 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-26 02:55:28,514 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-26 02:55:28,517 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-26 02:55:28,520 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-26 02:55:28,523 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-26 02:55:28,524 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-26 02:55:28,525 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-26 02:55:28,528 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-26 02:55:28,528 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-26 02:55:28,529 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-26 02:55:28,530 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-26 02:55:28,530 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-26 02:55:28,531 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-26 02:55:28,531 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-26 02:55:28,532 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-26 02:55:28,533 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-26 02:55:28,533 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-26 02:55:28,534 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-26 02:55:28,534 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-26 02:55:28,535 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-26 02:55:28,535 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-26 02:55:28,535 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-26 02:55:28,536 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-26 02:55:28,537 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-26 02:55:28,537 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_9f5a374e-5fbd-49b1-a74e-d37a01d0fdb5/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2019-11-26 02:55:28,562 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-26 02:55:28,562 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-26 02:55:28,563 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-26 02:55:28,563 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-26 02:55:28,563 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-26 02:55:28,563 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-26 02:55:28,563 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-26 02:55:28,563 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-26 02:55:28,564 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-26 02:55:28,564 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-26 02:55:28,564 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-26 02:55:28,564 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-26 02:55:28,565 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-26 02:55:28,565 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-11-26 02:55:28,565 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-26 02:55:28,565 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-26 02:55:28,565 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-26 02:55:28,565 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2019-11-26 02:55:28,566 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2019-11-26 02:55:28,566 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2019-11-26 02:55:28,566 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-26 02:55:28,566 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-26 02:55:28,566 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2019-11-26 02:55:28,567 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2019-11-26 02:55:28,567 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-26 02:55:28,567 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-26 02:55:28,567 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-26 02:55:28,567 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-26 02:55:28,567 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-26 02:55:28,568 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-26 02:55:28,568 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-26 02:55:28,568 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-26 02:55:28,568 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-26 02:55:28,568 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2019-11-26 02:55:28,569 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2019-11-26 02:55:28,569 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-26 02:55:28,569 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 -> /tmp/vcloud-vcloud-master/worker/run_dir_9f5a374e-5fbd-49b1-a74e-d37a01d0fdb5/bin/utaipan 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 -> Taipan 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 -> 744113fc2ef40828e0832f07c1176e726449b166 [2019-11-26 02:55:28,740 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-26 02:55:28,754 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-26 02:55:28,757 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-26 02:55:28,758 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-26 02:55:28,758 INFO L275 PluginConnector]: CDTParser initialized [2019-11-26 02:55:28,759 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_9f5a374e-5fbd-49b1-a74e-d37a01d0fdb5/bin/utaipan/../../sv-benchmarks/c/array-memsafety/count_down_unsafe.i [2019-11-26 02:55:28,823 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_9f5a374e-5fbd-49b1-a74e-d37a01d0fdb5/bin/utaipan/data/e3712f36c/9dfbec88351a45089320fa41e7c9f41c/FLAG09914fc43 [2019-11-26 02:55:29,270 INFO L306 CDTParser]: Found 1 translation units. [2019-11-26 02:55:29,272 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_9f5a374e-5fbd-49b1-a74e-d37a01d0fdb5/sv-benchmarks/c/array-memsafety/count_down_unsafe.i [2019-11-26 02:55:29,285 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_9f5a374e-5fbd-49b1-a74e-d37a01d0fdb5/bin/utaipan/data/e3712f36c/9dfbec88351a45089320fa41e7c9f41c/FLAG09914fc43 [2019-11-26 02:55:29,634 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_9f5a374e-5fbd-49b1-a74e-d37a01d0fdb5/bin/utaipan/data/e3712f36c/9dfbec88351a45089320fa41e7c9f41c [2019-11-26 02:55:29,636 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-26 02:55:29,637 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-26 02:55:29,637 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-26 02:55:29,638 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-26 02:55:29,641 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-26 02:55:29,642 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 02:55:29" (1/1) ... [2019-11-26 02:55:29,644 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@77ba139c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:55:29, skipping insertion in model container [2019-11-26 02:55:29,644 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 02:55:29" (1/1) ... [2019-11-26 02:55:29,652 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-26 02:55:29,694 INFO L179 MainTranslator]: Built tables and reachable declarations [2019-11-26 02:55:30,092 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-26 02:55:30,104 INFO L201 MainTranslator]: Completed pre-run [2019-11-26 02:55:30,151 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-26 02:55:30,202 INFO L205 MainTranslator]: Completed translation [2019-11-26 02:55:30,203 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:55:30 WrapperNode [2019-11-26 02:55:30,203 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-26 02:55:30,204 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-26 02:55:30,204 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-26 02:55:30,204 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-26 02:55:30,212 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:55:30" (1/1) ... [2019-11-26 02:55:30,227 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:55:30" (1/1) ... [2019-11-26 02:55:30,247 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-26 02:55:30,247 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-26 02:55:30,247 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-26 02:55:30,248 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-26 02:55:30,256 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:55:30" (1/1) ... [2019-11-26 02:55:30,256 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:55:30" (1/1) ... [2019-11-26 02:55:30,259 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:55:30" (1/1) ... [2019-11-26 02:55:30,259 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:55:30" (1/1) ... [2019-11-26 02:55:30,266 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:55:30" (1/1) ... [2019-11-26 02:55:30,270 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:55:30" (1/1) ... [2019-11-26 02:55:30,272 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:55:30" (1/1) ... [2019-11-26 02:55:30,275 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-26 02:55:30,275 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-26 02:55:30,276 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-26 02:55:30,276 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-26 02:55:30,276 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:55:30" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9f5a374e-5fbd-49b1-a74e-d37a01d0fdb5/bin/utaipan/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 [2019-11-26 02:55:30,324 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2019-11-26 02:55:30,324 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-26 02:55:30,326 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2019-11-26 02:55:30,326 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-26 02:55:30,326 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-26 02:55:30,326 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-26 02:55:30,704 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-26 02:55:30,704 INFO L284 CfgBuilder]: Removed 7 assume(true) statements. [2019-11-26 02:55:30,705 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 02:55:30 BoogieIcfgContainer [2019-11-26 02:55:30,705 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-26 02:55:30,706 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-26 02:55:30,706 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-26 02:55:30,709 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-26 02:55:30,722 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 02:55:29" (1/3) ... [2019-11-26 02:55:30,723 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@285b0f3f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 02:55:30, skipping insertion in model container [2019-11-26 02:55:30,723 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:55:30" (2/3) ... [2019-11-26 02:55:30,723 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@285b0f3f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 02:55:30, skipping insertion in model container [2019-11-26 02:55:30,723 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 02:55:30" (3/3) ... [2019-11-26 02:55:30,725 INFO L109 eAbstractionObserver]: Analyzing ICFG count_down_unsafe.i [2019-11-26 02:55:30,733 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-26 02:55:30,739 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 9 error locations. [2019-11-26 02:55:30,748 INFO L249 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2019-11-26 02:55:30,769 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-26 02:55:30,769 INFO L374 AbstractCegarLoop]: Hoare is false [2019-11-26 02:55:30,769 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-26 02:55:30,769 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-26 02:55:30,770 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-26 02:55:30,770 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-26 02:55:30,770 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-26 02:55:30,770 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-26 02:55:30,781 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states. [2019-11-26 02:55:30,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-11-26 02:55:30,786 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:55:30,787 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-11-26 02:55:30,787 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2019-11-26 02:55:30,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:55:30,791 INFO L82 PathProgramCache]: Analyzing trace with hash 889508774, now seen corresponding path program 1 times [2019-11-26 02:55:30,799 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:55:30,799 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1290618627] [2019-11-26 02:55:30,799 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9f5a374e-5fbd-49b1-a74e-d37a01d0fdb5/bin/utaipan/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 [2019-11-26 02:55:30,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:55:30,903 INFO L255 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-26 02:55:30,907 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:55:30,936 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:55:30,936 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:55:30,939 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:55:30,940 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1290618627] [2019-11-26 02:55:30,940 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-26 02:55:30,941 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2019-11-26 02:55:30,941 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656805436] [2019-11-26 02:55:30,945 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-26 02:55:30,946 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 02:55:30,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-26 02:55:30,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-26 02:55:30,959 INFO L87 Difference]: Start difference. First operand 31 states. Second operand 3 states. [2019-11-26 02:55:31,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:55:31,059 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2019-11-26 02:55:31,060 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-26 02:55:31,061 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2019-11-26 02:55:31,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:55:31,072 INFO L225 Difference]: With dead ends: 31 [2019-11-26 02:55:31,072 INFO L226 Difference]: Without dead ends: 29 [2019-11-26 02:55:31,074 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-26 02:55:31,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-11-26 02:55:31,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2019-11-26 02:55:31,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-11-26 02:55:31,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2019-11-26 02:55:31,114 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 6 [2019-11-26 02:55:31,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:55:31,114 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2019-11-26 02:55:31,115 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-26 02:55:31,115 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2019-11-26 02:55:31,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-26 02:55:31,116 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:55:31,116 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:55:31,318 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:55:31,318 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2019-11-26 02:55:31,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:55:31,319 INFO L82 PathProgramCache]: Analyzing trace with hash 119449364, now seen corresponding path program 1 times [2019-11-26 02:55:31,319 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:55:31,319 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [483136179] [2019-11-26 02:55:31,319 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9f5a374e-5fbd-49b1-a74e-d37a01d0fdb5/bin/utaipan/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 [2019-11-26 02:55:31,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:55:31,387 INFO L255 TraceCheckSpWp]: Trace formula consists of 25 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-26 02:55:31,388 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:55:31,417 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 [2019-11-26 02:55:31,417 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-26 02:55:31,420 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-26 02:55:31,421 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-26 02:55:31,421 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2019-11-26 02:55:31,426 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:55:31,426 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:55:31,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:55:31,429 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [483136179] [2019-11-26 02:55:31,430 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-26 02:55:31,430 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2019-11-26 02:55:31,430 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731396876] [2019-11-26 02:55:31,431 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-26 02:55:31,431 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 02:55:31,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-26 02:55:31,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-26 02:55:31,432 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 3 states. [2019-11-26 02:55:31,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:55:31,524 INFO L93 Difference]: Finished difference Result 25 states and 29 transitions. [2019-11-26 02:55:31,524 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-26 02:55:31,524 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2019-11-26 02:55:31,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:55:31,525 INFO L225 Difference]: With dead ends: 25 [2019-11-26 02:55:31,525 INFO L226 Difference]: Without dead ends: 25 [2019-11-26 02:55:31,526 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-26 02:55:31,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-11-26 02:55:31,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2019-11-26 02:55:31,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-11-26 02:55:31,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2019-11-26 02:55:31,530 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 8 [2019-11-26 02:55:31,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:55:31,530 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2019-11-26 02:55:31,530 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-26 02:55:31,531 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2019-11-26 02:55:31,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-26 02:55:31,531 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:55:31,531 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:55:31,732 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:55:31,733 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2019-11-26 02:55:31,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:55:31,734 INFO L82 PathProgramCache]: Analyzing trace with hash 119449365, now seen corresponding path program 1 times [2019-11-26 02:55:31,734 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:55:31,735 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [844937838] [2019-11-26 02:55:31,735 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9f5a374e-5fbd-49b1-a74e-d37a01d0fdb5/bin/utaipan/cvc4 Starting monitored process 4 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:55:31,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-26 02:55:31,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-26 02:55:31,879 INFO L174 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2019-11-26 02:55:31,879 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-26 02:55:32,080 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:55:32,096 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.11 02:55:32 BoogieIcfgContainer [2019-11-26 02:55:32,096 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-26 02:55:32,097 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-26 02:55:32,097 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-26 02:55:32,097 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-26 02:55:32,097 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 02:55:30" (3/4) ... [2019-11-26 02:55:32,099 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-11-26 02:55:32,138 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_9f5a374e-5fbd-49b1-a74e-d37a01d0fdb5/bin/utaipan/witness.graphml [2019-11-26 02:55:32,139 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-26 02:55:32,140 INFO L168 Benchmark]: Toolchain (without parser) took 2503.41 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 199.2 MB). Free memory was 946.1 MB in the beginning and 1.1 GB in the end (delta: -142.8 MB). Peak memory consumption was 56.4 MB. Max. memory is 11.5 GB. [2019-11-26 02:55:32,142 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-26 02:55:32,143 INFO L168 Benchmark]: CACSL2BoogieTranslator took 566.09 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 199.2 MB). Free memory was 946.1 MB in the beginning and 1.2 GB in the end (delta: -237.2 MB). Peak memory consumption was 17.7 MB. Max. memory is 11.5 GB. [2019-11-26 02:55:32,144 INFO L168 Benchmark]: Boogie Procedure Inliner took 43.15 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: 6.7 MB). Peak memory consumption was 6.7 MB. Max. memory is 11.5 GB. [2019-11-26 02:55:32,145 INFO L168 Benchmark]: Boogie Preprocessor took 27.98 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-26 02:55:32,147 INFO L168 Benchmark]: RCFGBuilder took 430.04 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: 22.4 MB). Peak memory consumption was 22.4 MB. Max. memory is 11.5 GB. [2019-11-26 02:55:32,148 INFO L168 Benchmark]: TraceAbstraction took 1390.06 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: 65.4 MB). Peak memory consumption was 65.4 MB. Max. memory is 11.5 GB. [2019-11-26 02:55:32,148 INFO L168 Benchmark]: Witness Printer took 42.34 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. [2019-11-26 02:55:32,151 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 566.09 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 199.2 MB). Free memory was 946.1 MB in the beginning and 1.2 GB in the end (delta: -237.2 MB). Peak memory consumption was 17.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 43.15 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: 6.7 MB). Peak memory consumption was 6.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 27.98 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 430.04 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: 22.4 MB). Peak memory consumption was 22.4 MB. Max. memory is 11.5 GB. * TraceAbstraction took 1390.06 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: 65.4 MB). Peak memory consumption was 65.4 MB. Max. memory is 11.5 GB. * Witness Printer took 42.34 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: 524]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L513] int i, j; [L514] int val; [L515] int length = __VERIFIER_nondet_int(); [L516] COND TRUE length < 1 [L516] length = 1 [L517] int *arr = __builtin_alloca (length); [L518] COND FALSE !(!arr) [L519] i=0 [L519] COND TRUE i