./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 a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_4dd1baa9-b3a3-425b-b6ff-db5c2b3d0bcb/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_4dd1baa9-b3a3-425b-b6ff-db5c2b3d0bcb/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_4dd1baa9-b3a3-425b-b6ff-db5c2b3d0bcb/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_4dd1baa9-b3a3-425b-b6ff-db5c2b3d0bcb/bin/uautomizer/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/count_down_unsafe.i -s /tmp/vcloud-vcloud-master/worker/run_dir_4dd1baa9-b3a3-425b-b6ff-db5c2b3d0bcb/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_4dd1baa9-b3a3-425b-b6ff-db5c2b3d0bcb/bin/uautomizer --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 0.2.0-a4ecdab [2020-11-29 23:37:03,189 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-29 23:37:03,191 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-29 23:37:03,251 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-29 23:37:03,252 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-29 23:37:03,273 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-29 23:37:03,275 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-29 23:37:03,277 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-29 23:37:03,279 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-29 23:37:03,281 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-29 23:37:03,281 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-29 23:37:03,283 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-29 23:37:03,283 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-29 23:37:03,285 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-29 23:37:03,286 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-29 23:37:03,287 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-29 23:37:03,293 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-29 23:37:03,298 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-29 23:37:03,303 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-29 23:37:03,307 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-29 23:37:03,312 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-29 23:37:03,314 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-29 23:37:03,316 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-29 23:37:03,318 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-29 23:37:03,325 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-29 23:37:03,329 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-29 23:37:03,330 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-29 23:37:03,331 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-29 23:37:03,332 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-29 23:37:03,334 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-29 23:37:03,334 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-29 23:37:03,336 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-29 23:37:03,338 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-29 23:37:03,339 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-29 23:37:03,340 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-29 23:37:03,341 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-29 23:37:03,342 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-29 23:37:03,342 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-29 23:37:03,343 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-29 23:37:03,345 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-29 23:37:03,346 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-29 23:37:03,349 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_4dd1baa9-b3a3-425b-b6ff-db5c2b3d0bcb/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2020-11-29 23:37:03,392 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-29 23:37:03,393 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-29 23:37:03,394 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-29 23:37:03,395 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-29 23:37:03,395 INFO L138 SettingsManager]: * Use SBE=true [2020-11-29 23:37:03,395 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-29 23:37:03,396 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-29 23:37:03,396 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-11-29 23:37:03,396 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-29 23:37:03,396 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-29 23:37:03,397 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-29 23:37:03,398 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-11-29 23:37:03,398 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-11-29 23:37:03,398 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-11-29 23:37:03,398 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-29 23:37:03,399 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-29 23:37:03,399 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-29 23:37:03,399 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-29 23:37:03,399 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-29 23:37:03,400 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-29 23:37:03,400 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-29 23:37:03,400 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-29 23:37:03,400 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-29 23:37:03,401 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-29 23:37:03,401 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-29 23:37:03,401 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-29 23:37:03,401 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-29 23:37:03,401 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-29 23:37:03,402 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud-vcloud-master/worker/run_dir_4dd1baa9-b3a3-425b-b6ff-db5c2b3d0bcb/bin/uautomizer/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_4dd1baa9-b3a3-425b-b6ff-db5c2b3d0bcb/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 744113fc2ef40828e0832f07c1176e726449b166 [2020-11-29 23:37:03,702 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-29 23:37:03,727 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-29 23:37:03,730 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-29 23:37:03,731 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-29 23:37:03,732 INFO L275 PluginConnector]: CDTParser initialized [2020-11-29 23:37:03,733 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_4dd1baa9-b3a3-425b-b6ff-db5c2b3d0bcb/bin/uautomizer/../../sv-benchmarks/c/array-memsafety/count_down_unsafe.i [2020-11-29 23:37:03,804 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_4dd1baa9-b3a3-425b-b6ff-db5c2b3d0bcb/bin/uautomizer/data/43e2fc707/0e96203936b147fb98405261d74b0d03/FLAG96819cea5 [2020-11-29 23:37:04,462 INFO L306 CDTParser]: Found 1 translation units. [2020-11-29 23:37:04,463 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_4dd1baa9-b3a3-425b-b6ff-db5c2b3d0bcb/sv-benchmarks/c/array-memsafety/count_down_unsafe.i [2020-11-29 23:37:04,485 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_4dd1baa9-b3a3-425b-b6ff-db5c2b3d0bcb/bin/uautomizer/data/43e2fc707/0e96203936b147fb98405261d74b0d03/FLAG96819cea5 [2020-11-29 23:37:04,744 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_4dd1baa9-b3a3-425b-b6ff-db5c2b3d0bcb/bin/uautomizer/data/43e2fc707/0e96203936b147fb98405261d74b0d03 [2020-11-29 23:37:04,746 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-29 23:37:04,748 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-11-29 23:37:04,750 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-29 23:37:04,750 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-29 23:37:04,756 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-29 23:37:04,760 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 11:37:04" (1/1) ... [2020-11-29 23:37:04,764 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@674077aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:37:04, skipping insertion in model container [2020-11-29 23:37:04,764 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 11:37:04" (1/1) ... [2020-11-29 23:37:04,771 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-29 23:37:04,818 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-29 23:37:05,224 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 23:37:05,239 INFO L203 MainTranslator]: Completed pre-run [2020-11-29 23:37:05,299 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 23:37:05,363 INFO L208 MainTranslator]: Completed translation [2020-11-29 23:37:05,364 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:37:05 WrapperNode [2020-11-29 23:37:05,365 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-29 23:37:05,366 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-29 23:37:05,366 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-29 23:37:05,366 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-29 23:37:05,378 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:37:05" (1/1) ... [2020-11-29 23:37:05,379 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:37:05" (1/1) ... [2020-11-29 23:37:05,406 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:37:05" (1/1) ... [2020-11-29 23:37:05,408 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:37:05" (1/1) ... [2020-11-29 23:37:05,435 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:37:05" (1/1) ... [2020-11-29 23:37:05,445 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:37:05" (1/1) ... [2020-11-29 23:37:05,453 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:37:05" (1/1) ... [2020-11-29 23:37:05,462 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-29 23:37:05,463 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-29 23:37:05,463 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-29 23:37:05,463 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-29 23:37:05,464 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:37:05" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4dd1baa9-b3a3-425b-b6ff-db5c2b3d0bcb/bin/uautomizer/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 [2020-11-29 23:37:05,543 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-29 23:37:05,544 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-29 23:37:05,544 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-11-29 23:37:05,544 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-11-29 23:37:05,545 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2020-11-29 23:37:05,545 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2020-11-29 23:37:05,545 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2020-11-29 23:37:05,545 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-29 23:37:05,546 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-11-29 23:37:05,546 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-11-29 23:37:05,547 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-11-29 23:37:05,547 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-11-29 23:37:05,548 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-11-29 23:37:05,548 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-11-29 23:37:05,548 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-11-29 23:37:05,548 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-11-29 23:37:05,549 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-11-29 23:37:05,549 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-11-29 23:37:05,549 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-11-29 23:37:05,550 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-11-29 23:37:05,550 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-11-29 23:37:05,550 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-11-29 23:37:05,550 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-11-29 23:37:05,550 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-11-29 23:37:05,551 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-11-29 23:37:05,551 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-11-29 23:37:05,551 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2020-11-29 23:37:05,551 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2020-11-29 23:37:05,551 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2020-11-29 23:37:05,552 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-11-29 23:37:05,552 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-11-29 23:37:05,552 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-11-29 23:37:05,552 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-11-29 23:37:05,552 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-11-29 23:37:05,553 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-11-29 23:37:05,553 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-11-29 23:37:05,553 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-11-29 23:37:05,553 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-11-29 23:37:05,553 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-11-29 23:37:05,553 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-11-29 23:37:05,554 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-11-29 23:37:05,554 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-11-29 23:37:05,554 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-11-29 23:37:05,554 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-11-29 23:37:05,554 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-11-29 23:37:05,555 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-11-29 23:37:05,555 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-11-29 23:37:05,555 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-11-29 23:37:05,555 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-11-29 23:37:05,555 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-11-29 23:37:05,555 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-11-29 23:37:05,556 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-11-29 23:37:05,556 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-11-29 23:37:05,556 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-11-29 23:37:05,557 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-11-29 23:37:05,557 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-11-29 23:37:05,557 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-11-29 23:37:05,558 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-11-29 23:37:05,558 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-11-29 23:37:05,559 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-11-29 23:37:05,559 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-11-29 23:37:05,559 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-11-29 23:37:05,559 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-11-29 23:37:05,559 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-11-29 23:37:05,560 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-11-29 23:37:05,560 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-11-29 23:37:05,560 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-11-29 23:37:05,560 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-11-29 23:37:05,560 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-11-29 23:37:05,561 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-11-29 23:37:05,561 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-11-29 23:37:05,562 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-29 23:37:05,563 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-11-29 23:37:05,563 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-11-29 23:37:05,564 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-11-29 23:37:05,564 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-11-29 23:37:05,564 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-11-29 23:37:05,564 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-11-29 23:37:05,564 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-11-29 23:37:05,564 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-11-29 23:37:05,565 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-11-29 23:37:05,565 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-11-29 23:37:05,566 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-11-29 23:37:05,566 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-11-29 23:37:05,566 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-11-29 23:37:05,566 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-11-29 23:37:05,566 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-11-29 23:37:05,567 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-11-29 23:37:05,567 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-11-29 23:37:05,567 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-11-29 23:37:05,567 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-11-29 23:37:05,567 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-11-29 23:37:05,568 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-11-29 23:37:05,568 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-11-29 23:37:05,568 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-11-29 23:37:05,568 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-11-29 23:37:05,568 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-11-29 23:37:05,568 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-11-29 23:37:05,569 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-11-29 23:37:05,569 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-11-29 23:37:05,569 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-11-29 23:37:05,569 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-11-29 23:37:05,569 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-11-29 23:37:05,570 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-11-29 23:37:05,570 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-11-29 23:37:05,570 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-11-29 23:37:05,570 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-11-29 23:37:05,570 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-11-29 23:37:05,571 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-11-29 23:37:05,571 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-11-29 23:37:05,571 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-11-29 23:37:05,571 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-11-29 23:37:05,571 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-11-29 23:37:05,571 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-11-29 23:37:05,572 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-11-29 23:37:05,572 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-11-29 23:37:05,572 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-29 23:37:05,573 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-29 23:37:05,573 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-29 23:37:05,574 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-29 23:37:05,574 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-29 23:37:05,574 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-29 23:37:05,574 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-29 23:37:06,243 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-29 23:37:06,243 INFO L298 CfgBuilder]: Removed 3 assume(true) statements. [2020-11-29 23:37:06,247 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 11:37:06 BoogieIcfgContainer [2020-11-29 23:37:06,247 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-29 23:37:06,249 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-29 23:37:06,249 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-29 23:37:06,253 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-29 23:37:06,254 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 11:37:04" (1/3) ... [2020-11-29 23:37:06,256 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5120ed1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 11:37:06, skipping insertion in model container [2020-11-29 23:37:06,258 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:37:05" (2/3) ... [2020-11-29 23:37:06,260 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5120ed1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 11:37:06, skipping insertion in model container [2020-11-29 23:37:06,260 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 11:37:06" (3/3) ... [2020-11-29 23:37:06,262 INFO L111 eAbstractionObserver]: Analyzing ICFG count_down_unsafe.i [2020-11-29 23:37:06,273 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-29 23:37:06,280 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 9 error locations. [2020-11-29 23:37:06,291 INFO L253 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2020-11-29 23:37:06,319 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-29 23:37:06,320 INFO L378 AbstractCegarLoop]: Hoare is false [2020-11-29 23:37:06,320 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-29 23:37:06,321 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-29 23:37:06,321 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-29 23:37:06,328 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-29 23:37:06,328 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-29 23:37:06,328 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-29 23:37:06,345 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states. [2020-11-29 23:37:06,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-29 23:37:06,359 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:37:06,360 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 23:37:06,360 INFO L429 AbstractCegarLoop]: === Iteration 1 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-29 23:37:06,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:37:06,368 INFO L82 PathProgramCache]: Analyzing trace with hash -587521551, now seen corresponding path program 1 times [2020-11-29 23:37:06,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:37:06,378 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211527473] [2020-11-29 23:37:06,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:37:06,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:37:06,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 23:37:06,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:37:06,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:37:06,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211527473] [2020-11-29 23:37:06,584 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 23:37:06,585 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-29 23:37:06,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827248171] [2020-11-29 23:37:06,590 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-29 23:37:06,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:37:06,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 23:37:06,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-29 23:37:06,611 INFO L87 Difference]: Start difference. First operand 36 states. Second operand 4 states. [2020-11-29 23:37:06,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:37:06,845 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2020-11-29 23:37:06,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-29 23:37:06,848 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-11-29 23:37:06,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:37:06,866 INFO L225 Difference]: With dead ends: 36 [2020-11-29 23:37:06,867 INFO L226 Difference]: Without dead ends: 33 [2020-11-29 23:37:06,868 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 [2020-11-29 23:37:06,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-11-29 23:37:06,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-11-29 23:37:06,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-11-29 23:37:06,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2020-11-29 23:37:06,916 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 10 [2020-11-29 23:37:06,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:37:06,916 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2020-11-29 23:37:06,916 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-29 23:37:06,916 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2020-11-29 23:37:06,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-29 23:37:06,917 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:37:06,917 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 23:37:06,917 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-29 23:37:06,918 INFO L429 AbstractCegarLoop]: === Iteration 2 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-29 23:37:06,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:37:06,918 INFO L82 PathProgramCache]: Analyzing trace with hash -1967514850, now seen corresponding path program 1 times [2020-11-29 23:37:06,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:37:06,919 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571669785] [2020-11-29 23:37:06,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:37:06,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:37:06,982 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 23:37:06,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:37:06,990 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:37:06,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571669785] [2020-11-29 23:37:06,991 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 23:37:06,991 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-29 23:37:06,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607560027] [2020-11-29 23:37:06,992 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-29 23:37:06,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:37:06,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 23:37:06,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-29 23:37:06,993 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 4 states. [2020-11-29 23:37:07,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:37:07,126 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2020-11-29 23:37:07,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 23:37:07,127 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-11-29 23:37:07,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:37:07,128 INFO L225 Difference]: With dead ends: 29 [2020-11-29 23:37:07,128 INFO L226 Difference]: Without dead ends: 29 [2020-11-29 23:37:07,129 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 [2020-11-29 23:37:07,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-11-29 23:37:07,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-11-29 23:37:07,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-11-29 23:37:07,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2020-11-29 23:37:07,134 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 12 [2020-11-29 23:37:07,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:37:07,134 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2020-11-29 23:37:07,135 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-29 23:37:07,135 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2020-11-29 23:37:07,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-29 23:37:07,135 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:37:07,136 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 23:37:07,136 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-29 23:37:07,136 INFO L429 AbstractCegarLoop]: === Iteration 3 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-11-29 23:37:07,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:37:07,137 INFO L82 PathProgramCache]: Analyzing trace with hash -1967514849, now seen corresponding path program 1 times [2020-11-29 23:37:07,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:37:07,137 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119308809] [2020-11-29 23:37:07,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:37:07,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 23:37:07,157 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 23:37:07,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 23:37:07,172 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 23:37:07,194 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 23:37:07,194 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-29 23:37:07,194 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-29 23:37:07,213 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.11 11:37:07 BoogieIcfgContainer [2020-11-29 23:37:07,213 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-29 23:37:07,213 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-29 23:37:07,213 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-29 23:37:07,214 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-29 23:37:07,214 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 11:37:06" (3/4) ... [2020-11-29 23:37:07,215 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-29 23:37:07,248 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_4dd1baa9-b3a3-425b-b6ff-db5c2b3d0bcb/bin/uautomizer/witness.graphml [2020-11-29 23:37:07,248 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-29 23:37:07,250 INFO L168 Benchmark]: Toolchain (without parser) took 2500.87 ms. Allocated memory was 98.6 MB in the beginning and 142.6 MB in the end (delta: 44.0 MB). Free memory was 68.8 MB in the beginning and 94.4 MB in the end (delta: -25.6 MB). Peak memory consumption was 17.9 MB. Max. memory is 16.1 GB. [2020-11-29 23:37:07,250 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 98.6 MB. Free memory was 56.4 MB in the beginning and 56.4 MB in the end (delta: 71.5 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 23:37:07,251 INFO L168 Benchmark]: CACSL2BoogieTranslator took 615.64 ms. Allocated memory was 98.6 MB in the beginning and 142.6 MB in the end (delta: 44.0 MB). Free memory was 68.8 MB in the beginning and 108.0 MB in the end (delta: -39.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-29 23:37:07,252 INFO L168 Benchmark]: Boogie Preprocessor took 96.15 ms. Allocated memory is still 142.6 MB. Free memory was 108.0 MB in the beginning and 106.0 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 23:37:07,252 INFO L168 Benchmark]: RCFGBuilder took 784.27 ms. Allocated memory is still 142.6 MB. Free memory was 106.0 MB in the beginning and 68.2 MB in the end (delta: 37.8 MB). Peak memory consumption was 37.7 MB. Max. memory is 16.1 GB. [2020-11-29 23:37:07,253 INFO L168 Benchmark]: TraceAbstraction took 964.04 ms. Allocated memory is still 142.6 MB. Free memory was 67.6 MB in the beginning and 96.5 MB in the end (delta: -28.8 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 23:37:07,253 INFO L168 Benchmark]: Witness Printer took 34.57 ms. Allocated memory is still 142.6 MB. Free memory was 96.5 MB in the beginning and 94.4 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 23:37:07,257 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 98.6 MB. Free memory was 56.4 MB in the beginning and 56.4 MB in the end (delta: 71.5 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 615.64 ms. Allocated memory was 98.6 MB in the beginning and 142.6 MB in the end (delta: 44.0 MB). Free memory was 68.8 MB in the beginning and 108.0 MB in the end (delta: -39.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 96.15 ms. Allocated memory is still 142.6 MB. Free memory was 108.0 MB in the beginning and 106.0 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 784.27 ms. Allocated memory is still 142.6 MB. Free memory was 106.0 MB in the beginning and 68.2 MB in the end (delta: 37.8 MB). Peak memory consumption was 37.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 964.04 ms. Allocated memory is still 142.6 MB. Free memory was 67.6 MB in the beginning and 96.5 MB in the end (delta: -28.8 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 34.57 ms. Allocated memory is still 142.6 MB. Free memory was 96.5 MB in the beginning and 94.4 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 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