./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 9a8b2e8d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -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/array-memsafety/count_down_unsafe.i -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 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 --- This is Ultimate 0.1.25-9a8b2e8 [2020-10-20 05:48:31,222 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-20 05:48:31,225 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-20 05:48:31,258 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-20 05:48:31,259 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-20 05:48:31,269 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-20 05:48:31,271 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-20 05:48:31,274 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-20 05:48:31,277 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-20 05:48:31,280 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-20 05:48:31,282 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-20 05:48:31,284 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-20 05:48:31,285 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-20 05:48:31,288 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-20 05:48:31,289 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-20 05:48:31,291 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-20 05:48:31,293 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-20 05:48:31,294 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-20 05:48:31,296 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-20 05:48:31,303 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-20 05:48:31,306 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-20 05:48:31,308 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-20 05:48:31,310 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-20 05:48:31,310 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-20 05:48:31,333 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-20 05:48:31,334 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-20 05:48:31,334 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-20 05:48:31,335 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-20 05:48:31,335 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-20 05:48:31,336 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-20 05:48:31,337 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-20 05:48:31,337 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-20 05:48:31,338 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-20 05:48:31,339 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-20 05:48:31,340 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-20 05:48:31,340 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-20 05:48:31,341 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-20 05:48:31,341 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-20 05:48:31,341 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-20 05:48:31,342 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-20 05:48:31,343 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-20 05:48:31,344 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2020-10-20 05:48:31,367 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-20 05:48:31,367 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-20 05:48:31,368 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-20 05:48:31,369 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-20 05:48:31,369 INFO L138 SettingsManager]: * Use SBE=true [2020-10-20 05:48:31,369 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-20 05:48:31,369 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-20 05:48:31,370 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-10-20 05:48:31,370 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-20 05:48:31,370 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-20 05:48:31,370 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-20 05:48:31,371 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-10-20 05:48:31,371 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-10-20 05:48:31,371 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-10-20 05:48:31,371 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-20 05:48:31,372 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-10-20 05:48:31,372 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-20 05:48:31,372 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-20 05:48:31,372 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-20 05:48:31,373 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-20 05:48:31,373 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-20 05:48:31,373 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-20 05:48:31,373 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-20 05:48:31,374 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-20 05:48:31,374 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-20 05:48:31,374 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-20 05:48:31,374 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-20 05:48:31,375 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-20 05:48:31,375 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 -> 744113fc2ef40828e0832f07c1176e726449b166 [2020-10-20 05:48:31,591 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-20 05:48:31,603 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-20 05:48:31,607 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-20 05:48:31,609 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-20 05:48:31,609 INFO L275 PluginConnector]: CDTParser initialized [2020-10-20 05:48:31,610 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-memsafety/count_down_unsafe.i [2020-10-20 05:48:31,682 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e2fe84326/67d392417dbc4c969e092d45a70d5926/FLAG3e82dfc6e [2020-10-20 05:48:32,166 INFO L306 CDTParser]: Found 1 translation units. [2020-10-20 05:48:32,167 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/count_down_unsafe.i [2020-10-20 05:48:32,182 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e2fe84326/67d392417dbc4c969e092d45a70d5926/FLAG3e82dfc6e [2020-10-20 05:48:32,528 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e2fe84326/67d392417dbc4c969e092d45a70d5926 [2020-10-20 05:48:32,532 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-20 05:48:32,539 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-20 05:48:32,541 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-20 05:48:32,541 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-20 05:48:32,545 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-20 05:48:32,546 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 05:48:32" (1/1) ... [2020-10-20 05:48:32,549 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4756b890 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:48:32, skipping insertion in model container [2020-10-20 05:48:32,550 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 05:48:32" (1/1) ... [2020-10-20 05:48:32,559 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-20 05:48:32,617 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-20 05:48:33,087 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 05:48:33,100 INFO L203 MainTranslator]: Completed pre-run [2020-10-20 05:48:33,172 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 05:48:33,234 INFO L208 MainTranslator]: Completed translation [2020-10-20 05:48:33,234 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:48:33 WrapperNode [2020-10-20 05:48:33,235 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-20 05:48:33,235 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-20 05:48:33,236 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-20 05:48:33,236 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-20 05:48:33,255 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:48:33" (1/1) ... [2020-10-20 05:48:33,256 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:48:33" (1/1) ... [2020-10-20 05:48:33,271 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:48:33" (1/1) ... [2020-10-20 05:48:33,272 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:48:33" (1/1) ... [2020-10-20 05:48:33,291 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:48:33" (1/1) ... [2020-10-20 05:48:33,296 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:48:33" (1/1) ... [2020-10-20 05:48:33,299 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:48:33" (1/1) ... [2020-10-20 05:48:33,305 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-20 05:48:33,306 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-20 05:48:33,306 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-20 05:48:33,306 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-20 05:48:33,307 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:48:33" (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 [2020-10-20 05:48:33,382 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-20 05:48:33,383 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-20 05:48:33,383 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-10-20 05:48:33,383 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-10-20 05:48:33,383 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2020-10-20 05:48:33,384 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2020-10-20 05:48:33,384 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2020-10-20 05:48:33,384 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-20 05:48:33,384 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-20 05:48:33,385 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-20 05:48:33,385 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-20 05:48:33,385 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-20 05:48:33,385 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-20 05:48:33,386 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-20 05:48:33,386 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-20 05:48:33,386 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-20 05:48:33,386 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-20 05:48:33,387 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-20 05:48:33,387 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-20 05:48:33,387 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-20 05:48:33,388 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-20 05:48:33,388 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-20 05:48:33,388 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-20 05:48:33,388 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-20 05:48:33,388 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-10-20 05:48:33,389 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-10-20 05:48:33,389 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2020-10-20 05:48:33,389 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2020-10-20 05:48:33,389 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2020-10-20 05:48:33,390 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-20 05:48:33,390 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-20 05:48:33,390 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-20 05:48:33,390 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-20 05:48:33,391 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-20 05:48:33,391 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-20 05:48:33,391 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-20 05:48:33,391 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-20 05:48:33,392 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-20 05:48:33,392 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-20 05:48:33,392 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-20 05:48:33,392 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-20 05:48:33,393 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-20 05:48:33,393 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-20 05:48:33,393 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-20 05:48:33,393 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-20 05:48:33,393 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-20 05:48:33,394 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-20 05:48:33,394 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-20 05:48:33,394 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-20 05:48:33,394 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-20 05:48:33,394 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-20 05:48:33,394 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-20 05:48:33,395 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-20 05:48:33,395 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-20 05:48:33,395 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-20 05:48:33,395 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-20 05:48:33,396 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-20 05:48:33,396 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-20 05:48:33,396 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-20 05:48:33,396 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-20 05:48:33,397 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-20 05:48:33,397 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-20 05:48:33,397 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-20 05:48:33,397 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-20 05:48:33,397 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-20 05:48:33,398 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-20 05:48:33,398 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-20 05:48:33,398 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-20 05:48:33,398 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-20 05:48:33,398 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-20 05:48:33,399 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-20 05:48:33,399 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-20 05:48:33,399 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-20 05:48:33,399 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-20 05:48:33,399 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-20 05:48:33,400 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-20 05:48:33,400 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-20 05:48:33,400 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-20 05:48:33,400 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-20 05:48:33,401 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-20 05:48:33,401 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-20 05:48:33,401 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-20 05:48:33,401 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-20 05:48:33,401 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-20 05:48:33,402 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-20 05:48:33,402 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-20 05:48:33,402 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-20 05:48:33,402 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-20 05:48:33,402 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-20 05:48:33,403 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-20 05:48:33,403 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-20 05:48:33,403 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-20 05:48:33,403 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-20 05:48:33,403 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-20 05:48:33,404 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-20 05:48:33,404 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-20 05:48:33,404 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-20 05:48:33,404 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-20 05:48:33,404 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-20 05:48:33,405 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-20 05:48:33,405 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-20 05:48:33,405 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-20 05:48:33,405 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-20 05:48:33,405 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-20 05:48:33,406 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-20 05:48:33,406 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-20 05:48:33,406 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-20 05:48:33,406 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-20 05:48:33,406 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-20 05:48:33,407 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-20 05:48:33,407 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-20 05:48:33,407 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-20 05:48:33,407 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-20 05:48:33,407 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-20 05:48:33,408 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-20 05:48:33,408 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-20 05:48:33,408 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-20 05:48:33,408 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-20 05:48:33,408 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-20 05:48:33,409 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-20 05:48:33,409 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-20 05:48:33,409 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-20 05:48:33,409 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-20 05:48:33,921 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-20 05:48:33,921 INFO L298 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-20 05:48:33,923 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 05:48:33 BoogieIcfgContainer [2020-10-20 05:48:33,923 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-20 05:48:33,925 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-20 05:48:33,925 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-20 05:48:33,928 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-20 05:48:33,933 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.10 05:48:32" (1/3) ... [2020-10-20 05:48:33,934 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22076085 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 05:48:33, skipping insertion in model container [2020-10-20 05:48:33,934 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:48:33" (2/3) ... [2020-10-20 05:48:33,935 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22076085 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 05:48:33, skipping insertion in model container [2020-10-20 05:48:33,935 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 05:48:33" (3/3) ... [2020-10-20 05:48:33,937 INFO L111 eAbstractionObserver]: Analyzing ICFG count_down_unsafe.i [2020-10-20 05:48:33,949 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-20 05:48:33,957 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 9 error locations. [2020-10-20 05:48:33,972 INFO L253 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2020-10-20 05:48:33,993 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-20 05:48:33,994 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-20 05:48:33,994 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-20 05:48:33,994 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-20 05:48:33,994 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-20 05:48:33,995 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-20 05:48:33,995 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-20 05:48:33,995 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-20 05:48:34,009 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states. [2020-10-20 05:48:34,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-20 05:48:34,018 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 05:48:34,019 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 05:48:34,019 INFO L429 AbstractCegarLoop]: === Iteration 1 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-20 05:48:34,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 05:48:34,025 INFO L82 PathProgramCache]: Analyzing trace with hash -587521551, now seen corresponding path program 1 times [2020-10-20 05:48:34,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 05:48:34,034 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950264089] [2020-10-20 05:48:34,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 05:48:34,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:48:34,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 05:48:34,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:48:34,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 05:48:34,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950264089] [2020-10-20 05:48:34,260 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 05:48:34,260 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 05:48:34,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000465424] [2020-10-20 05:48:34,268 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 05:48:34,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 05:48:34,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 05:48:34,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 05:48:34,288 INFO L87 Difference]: Start difference. First operand 36 states. Second operand 4 states. [2020-10-20 05:48:34,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 05:48:34,486 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2020-10-20 05:48:34,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-20 05:48:34,489 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-10-20 05:48:34,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 05:48:34,521 INFO L225 Difference]: With dead ends: 36 [2020-10-20 05:48:34,521 INFO L226 Difference]: Without dead ends: 33 [2020-10-20 05:48:34,523 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-20 05:48:34,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-20 05:48:34,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-10-20 05:48:34,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-20 05:48:34,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2020-10-20 05:48:34,572 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 10 [2020-10-20 05:48:34,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 05:48:34,573 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2020-10-20 05:48:34,573 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 05:48:34,574 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2020-10-20 05:48:34,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-20 05:48:34,575 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 05:48:34,575 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 05:48:34,575 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-20 05:48:34,576 INFO L429 AbstractCegarLoop]: === Iteration 2 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-20 05:48:34,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 05:48:34,576 INFO L82 PathProgramCache]: Analyzing trace with hash -1967514850, now seen corresponding path program 1 times [2020-10-20 05:48:34,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 05:48:34,577 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144275369] [2020-10-20 05:48:34,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 05:48:34,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:48:34,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 05:48:34,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:48:34,705 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 05:48:34,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144275369] [2020-10-20 05:48:34,706 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 05:48:34,706 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-20 05:48:34,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007489374] [2020-10-20 05:48:34,709 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 05:48:34,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 05:48:34,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 05:48:34,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 05:48:34,710 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 4 states. [2020-10-20 05:48:34,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 05:48:34,798 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2020-10-20 05:48:34,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 05:48:34,799 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-10-20 05:48:34,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 05:48:34,800 INFO L225 Difference]: With dead ends: 29 [2020-10-20 05:48:34,800 INFO L226 Difference]: Without dead ends: 29 [2020-10-20 05:48:34,801 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 [2020-10-20 05:48:34,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-20 05:48:34,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-10-20 05:48:34,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-20 05:48:34,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2020-10-20 05:48:34,807 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 12 [2020-10-20 05:48:34,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 05:48:34,807 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2020-10-20 05:48:34,808 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 05:48:34,808 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2020-10-20 05:48:34,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-20 05:48:34,809 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 05:48:34,809 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 05:48:34,809 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-20 05:48:34,809 INFO L429 AbstractCegarLoop]: === Iteration 3 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-20 05:48:34,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 05:48:34,810 INFO L82 PathProgramCache]: Analyzing trace with hash -1967514849, now seen corresponding path program 1 times [2020-10-20 05:48:34,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 05:48:34,811 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124370438] [2020-10-20 05:48:34,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 05:48:34,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 05:48:34,832 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 05:48:34,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 05:48:34,847 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 05:48:34,889 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 05:48:34,890 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-20 05:48:34,890 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-20 05:48:34,917 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.10 05:48:34 BoogieIcfgContainer [2020-10-20 05:48:34,918 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-20 05:48:34,918 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-20 05:48:34,918 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-20 05:48:34,919 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-20 05:48:34,919 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 05:48:33" (3/4) ... [2020-10-20 05:48:34,922 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-10-20 05:48:34,972 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-20 05:48:34,973 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-20 05:48:34,976 INFO L168 Benchmark]: Toolchain (without parser) took 2440.42 ms. Allocated memory was 37.2 MB in the beginning and 53.5 MB in the end (delta: 16.3 MB). Free memory was 17.9 MB in the beginning and 29.0 MB in the end (delta: -11.1 MB). Peak memory consumption was 5.1 MB. Max. memory is 14.3 GB. [2020-10-20 05:48:34,977 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 34.1 MB. Free memory was 10.9 MB in the beginning and 10.8 MB in the end (delta: 47.7 kB). Peak memory consumption was 47.7 kB. Max. memory is 14.3 GB. [2020-10-20 05:48:34,978 INFO L168 Benchmark]: CACSL2BoogieTranslator took 694.32 ms. Allocated memory was 37.2 MB in the beginning and 45.6 MB in the end (delta: 8.4 MB). Free memory was 17.0 MB in the beginning and 16.3 MB in the end (delta: 681.5 kB). Peak memory consumption was 15.9 MB. Max. memory is 14.3 GB. [2020-10-20 05:48:34,979 INFO L168 Benchmark]: Boogie Preprocessor took 70.17 ms. Allocated memory was 45.6 MB in the beginning and 46.7 MB in the end (delta: 1.0 MB). Free memory was 16.3 MB in the beginning and 27.3 MB in the end (delta: -11.0 MB). Peak memory consumption was 2.7 MB. Max. memory is 14.3 GB. [2020-10-20 05:48:34,980 INFO L168 Benchmark]: RCFGBuilder took 617.55 ms. Allocated memory was 46.7 MB in the beginning and 49.8 MB in the end (delta: 3.1 MB). Free memory was 27.3 MB in the beginning and 21.5 MB in the end (delta: 5.8 MB). Peak memory consumption was 16.3 MB. Max. memory is 14.3 GB. [2020-10-20 05:48:34,981 INFO L168 Benchmark]: TraceAbstraction took 993.27 ms. Allocated memory was 49.8 MB in the beginning and 53.5 MB in the end (delta: 3.7 MB). Free memory was 20.8 MB in the beginning and 31.2 MB in the end (delta: -10.4 MB). Peak memory consumption was 14.0 MB. Max. memory is 14.3 GB. [2020-10-20 05:48:34,981 INFO L168 Benchmark]: Witness Printer took 54.48 ms. Allocated memory is still 53.5 MB. Free memory was 31.2 MB in the beginning and 29.0 MB in the end (delta: 2.2 MB). Peak memory consumption was 2.2 MB. Max. memory is 14.3 GB. [2020-10-20 05:48:34,986 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 34.1 MB. Free memory was 10.9 MB in the beginning and 10.8 MB in the end (delta: 47.7 kB). Peak memory consumption was 47.7 kB. Max. memory is 14.3 GB. * CACSL2BoogieTranslator took 694.32 ms. Allocated memory was 37.2 MB in the beginning and 45.6 MB in the end (delta: 8.4 MB). Free memory was 17.0 MB in the beginning and 16.3 MB in the end (delta: 681.5 kB). Peak memory consumption was 15.9 MB. Max. memory is 14.3 GB. * Boogie Preprocessor took 70.17 ms. Allocated memory was 45.6 MB in the beginning and 46.7 MB in the end (delta: 1.0 MB). Free memory was 16.3 MB in the beginning and 27.3 MB in the end (delta: -11.0 MB). Peak memory consumption was 2.7 MB. Max. memory is 14.3 GB. * RCFGBuilder took 617.55 ms. Allocated memory was 46.7 MB in the beginning and 49.8 MB in the end (delta: 3.1 MB). Free memory was 27.3 MB in the beginning and 21.5 MB in the end (delta: 5.8 MB). Peak memory consumption was 16.3 MB. Max. memory is 14.3 GB. * TraceAbstraction took 993.27 ms. Allocated memory was 49.8 MB in the beginning and 53.5 MB in the end (delta: 3.7 MB). Free memory was 20.8 MB in the beginning and 31.2 MB in the end (delta: -10.4 MB). Peak memory consumption was 14.0 MB. Max. memory is 14.3 GB. * Witness Printer took 54.48 ms. Allocated memory is still 53.5 MB. Free memory was 31.2 MB in the beginning and 29.0 MB in the end (delta: 2.2 MB). Peak memory consumption was 2.2 MB. Max. memory is 14.3 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 VAL [length=1] [L517] int *arr = __builtin_alloca (length); VAL [__builtin_alloca (length)={2:0}, arr={2:0}, length=1] [L518] COND FALSE !(!arr) [L519] i=0 VAL [__builtin_alloca (length)={2:0}, arr={2:0}, i=0, length=1] [L519] COND TRUE i