./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/aws-c-common/aws_byte_buf_write_from_whole_string_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3061b6dc Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/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_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/aws-c-common/aws_byte_buf_write_from_whole_string_harness.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 7d9514ee1b6f3a0027f117bcf81d6b26d525fe99251459ecef3c46cad248dd1f --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-assert-order-craig-3061b6d-m [2024-11-19 02:10:32,076 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-19 02:10:32,138 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2024-11-19 02:10:32,141 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-19 02:10:32,142 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-19 02:10:32,165 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-19 02:10:32,166 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-19 02:10:32,166 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-19 02:10:32,167 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-19 02:10:32,167 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-19 02:10:32,168 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-19 02:10:32,168 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-19 02:10:32,169 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-19 02:10:32,169 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-19 02:10:32,170 INFO L153 SettingsManager]: * Use SBE=true [2024-11-19 02:10:32,171 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-19 02:10:32,171 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-19 02:10:32,171 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-19 02:10:32,171 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-19 02:10:32,172 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-19 02:10:32,172 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-19 02:10:32,174 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-19 02:10:32,175 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-19 02:10:32,175 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-19 02:10:32,175 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-19 02:10:32,175 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-19 02:10:32,175 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-19 02:10:32,176 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-19 02:10:32,176 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-19 02:10:32,176 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-19 02:10:32,176 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-19 02:10:32,176 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-19 02:10:32,176 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-19 02:10:32,176 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-19 02:10:32,177 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-19 02:10:32,177 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-19 02:10:32,177 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-19 02:10:32,177 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-19 02:10:32,177 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-19 02:10:32,178 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7d9514ee1b6f3a0027f117bcf81d6b26d525fe99251459ecef3c46cad248dd1f [2024-11-19 02:10:32,426 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-19 02:10:32,445 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-19 02:10:32,447 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-19 02:10:32,448 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-19 02:10:32,448 INFO L274 PluginConnector]: CDTParser initialized [2024-11-19 02:10:32,449 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/aws-c-common/aws_byte_buf_write_from_whole_string_harness.i [2024-11-19 02:10:33,654 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-19 02:10:34,042 INFO L384 CDTParser]: Found 1 translation units. [2024-11-19 02:10:34,042 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_byte_buf_write_from_whole_string_harness.i [2024-11-19 02:10:34,079 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f6de5b17e/c64fa43c362b47dcbaa50fb4133adf4a/FLAG7f7690ae2 [2024-11-19 02:10:34,235 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f6de5b17e/c64fa43c362b47dcbaa50fb4133adf4a [2024-11-19 02:10:34,237 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-19 02:10:34,238 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-19 02:10:34,239 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-19 02:10:34,239 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-19 02:10:34,243 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-19 02:10:34,244 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:10:34" (1/1) ... [2024-11-19 02:10:34,246 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@14bf1730 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:10:34, skipping insertion in model container [2024-11-19 02:10:34,247 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:10:34" (1/1) ... [2024-11-19 02:10:34,332 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-19 02:10:34,560 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_byte_buf_write_from_whole_string_harness.i[4510,4523] [2024-11-19 02:10:34,567 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_byte_buf_write_from_whole_string_harness.i[4570,4583] [2024-11-19 02:10:35,143 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-19 02:10:35,144 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-19 02:10:35,144 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-19 02:10:35,144 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-19 02:10:35,145 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-19 02:10:35,153 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-19 02:10:35,154 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-19 02:10:35,155 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-19 02:10:35,155 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-19 02:10:35,157 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-19 02:10:35,160 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-19 02:10:35,160 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-19 02:10:35,161 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-19 02:10:35,540 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-19 02:10:35,546 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-19 02:10:35,621 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-19 02:10:35,622 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-19 02:10:35,786 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-19 02:10:35,832 INFO L200 MainTranslator]: Completed pre-run [2024-11-19 02:10:35,847 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_byte_buf_write_from_whole_string_harness.i[4510,4523] [2024-11-19 02:10:35,848 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_byte_buf_write_from_whole_string_harness.i[4570,4583] [2024-11-19 02:10:35,879 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-19 02:10:35,880 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-19 02:10:35,880 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-19 02:10:35,880 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-19 02:10:35,881 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-19 02:10:35,886 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-19 02:10:35,887 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-19 02:10:35,887 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-19 02:10:35,888 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-19 02:10:35,888 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-19 02:10:35,889 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-19 02:10:35,889 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-19 02:10:35,889 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-19 02:10:35,951 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-19 02:10:35,954 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-19 02:10:35,988 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" : "+r"(index)); [8553] [2024-11-19 02:10:35,991 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-19 02:10:35,992 WARN L1674 CHandler]: Possible shadowing of function index [2024-11-19 02:10:36,001 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" : : "r"(pBuf) : "memory"); [9039-9050] [2024-11-19 02:10:36,024 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-19 02:10:36,226 INFO L204 MainTranslator]: Completed translation [2024-11-19 02:10:36,227 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:10:36 WrapperNode [2024-11-19 02:10:36,227 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-19 02:10:36,228 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-19 02:10:36,228 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-19 02:10:36,228 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-19 02:10:36,233 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:10:36" (1/1) ... [2024-11-19 02:10:36,336 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:10:36" (1/1) ... [2024-11-19 02:10:36,415 INFO L138 Inliner]: procedures = 684, calls = 3059, calls flagged for inlining = 70, calls inlined = 10, statements flattened = 980 [2024-11-19 02:10:36,416 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-19 02:10:36,417 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-19 02:10:36,418 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-19 02:10:36,418 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-19 02:10:36,427 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:10:36" (1/1) ... [2024-11-19 02:10:36,428 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:10:36" (1/1) ... [2024-11-19 02:10:36,438 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:10:36" (1/1) ... [2024-11-19 02:10:36,506 INFO L175 MemorySlicer]: Split 591 memory accesses to 7 slices as follows [21, 51, 6, 2, 257, 238, 16]. 43 percent of accesses are in the largest equivalence class. The 37 initializations are split as follows [5, 8, 0, 2, 0, 6, 16]. The 498 writes are split as follows [4, 3, 2, 0, 257, 232, 0]. [2024-11-19 02:10:36,506 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:10:36" (1/1) ... [2024-11-19 02:10:36,506 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:10:36" (1/1) ... [2024-11-19 02:10:36,549 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:10:36" (1/1) ... [2024-11-19 02:10:36,555 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:10:36" (1/1) ... [2024-11-19 02:10:36,567 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:10:36" (1/1) ... [2024-11-19 02:10:36,575 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:10:36" (1/1) ... [2024-11-19 02:10:36,591 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-19 02:10:36,592 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-19 02:10:36,592 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-19 02:10:36,592 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-19 02:10:36,593 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:10:36" (1/1) ... [2024-11-19 02:10:36,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-19 02:10:36,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 02:10:36,622 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-19 02:10:36,624 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-19 02:10:36,662 INFO L130 BoogieDeclarations]: Found specification of procedure aws_string_is_valid [2024-11-19 02:10:36,663 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_string_is_valid [2024-11-19 02:10:36,663 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_buf_is_valid [2024-11-19 02:10:36,663 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_buf_is_valid [2024-11-19 02:10:36,663 INFO L130 BoogieDeclarations]: Found specification of procedure ensure_string_is_allocated_bounded_length [2024-11-19 02:10:36,663 INFO L138 BoogieDeclarations]: Found implementation of procedure ensure_string_is_allocated_bounded_length [2024-11-19 02:10:36,663 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-19 02:10:36,663 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2024-11-19 02:10:36,663 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2024-11-19 02:10:36,663 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~real#0 [2024-11-19 02:10:36,664 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~real#1 [2024-11-19 02:10:36,664 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~real#2 [2024-11-19 02:10:36,664 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~real#3 [2024-11-19 02:10:36,664 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~real#4 [2024-11-19 02:10:36,664 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~real#5 [2024-11-19 02:10:36,664 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~real#6 [2024-11-19 02:10:36,664 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int#0 [2024-11-19 02:10:36,664 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int#1 [2024-11-19 02:10:36,664 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int#2 [2024-11-19 02:10:36,665 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int#3 [2024-11-19 02:10:36,665 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int#4 [2024-11-19 02:10:36,665 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int#5 [2024-11-19 02:10:36,665 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int#6 [2024-11-19 02:10:36,665 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#0 [2024-11-19 02:10:36,665 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#1 [2024-11-19 02:10:36,665 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#2 [2024-11-19 02:10:36,666 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#3 [2024-11-19 02:10:36,666 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#4 [2024-11-19 02:10:36,667 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#5 [2024-11-19 02:10:36,667 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#6 [2024-11-19 02:10:36,667 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-19 02:10:36,667 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-19 02:10:36,667 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-19 02:10:36,668 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-11-19 02:10:36,668 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-11-19 02:10:36,668 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2024-11-19 02:10:36,668 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#6 [2024-11-19 02:10:36,669 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy#0 [2024-11-19 02:10:36,669 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy#1 [2024-11-19 02:10:36,669 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy#2 [2024-11-19 02:10:36,669 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy#3 [2024-11-19 02:10:36,669 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy#4 [2024-11-19 02:10:36,670 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy#5 [2024-11-19 02:10:36,670 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy#6 [2024-11-19 02:10:36,670 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy#0 [2024-11-19 02:10:36,670 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy#1 [2024-11-19 02:10:36,670 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy#2 [2024-11-19 02:10:36,670 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy#3 [2024-11-19 02:10:36,670 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy#4 [2024-11-19 02:10:36,670 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy#5 [2024-11-19 02:10:36,670 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy#6 [2024-11-19 02:10:36,670 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-19 02:10:36,671 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-19 02:10:36,671 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-19 02:10:36,671 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-19 02:10:36,671 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2024-11-19 02:10:36,671 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2024-11-19 02:10:36,671 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2024-11-19 02:10:36,671 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#3 [2024-11-19 02:10:36,671 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#4 [2024-11-19 02:10:36,671 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#5 [2024-11-19 02:10:36,671 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#6 [2024-11-19 02:10:36,671 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-19 02:10:36,671 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-19 02:10:36,671 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2024-11-19 02:10:36,671 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2024-11-19 02:10:36,672 INFO L130 BoogieDeclarations]: Found specification of procedure assert_byte_from_buffer_matches [2024-11-19 02:10:36,672 INFO L138 BoogieDeclarations]: Found implementation of procedure assert_byte_from_buffer_matches [2024-11-19 02:10:36,672 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$#0 [2024-11-19 02:10:36,672 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$#1 [2024-11-19 02:10:36,672 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$#2 [2024-11-19 02:10:36,672 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$#3 [2024-11-19 02:10:36,672 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$#4 [2024-11-19 02:10:36,673 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$#5 [2024-11-19 02:10:36,673 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$#6 [2024-11-19 02:10:36,673 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$#0 [2024-11-19 02:10:36,673 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$#1 [2024-11-19 02:10:36,673 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$#2 [2024-11-19 02:10:36,673 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$#3 [2024-11-19 02:10:36,673 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$#4 [2024-11-19 02:10:36,673 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$#5 [2024-11-19 02:10:36,674 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$#6 [2024-11-19 02:10:36,674 INFO L130 BoogieDeclarations]: Found specification of procedure aws_string_bytes [2024-11-19 02:10:36,674 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_string_bytes [2024-11-19 02:10:36,674 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-11-19 02:10:36,674 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-11-19 02:10:36,674 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-19 02:10:36,674 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2024-11-19 02:10:36,674 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2024-11-19 02:10:36,674 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2024-11-19 02:10:36,675 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#3 [2024-11-19 02:10:36,675 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#4 [2024-11-19 02:10:36,675 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#5 [2024-11-19 02:10:36,675 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#6 [2024-11-19 02:10:36,675 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_buf_write [2024-11-19 02:10:36,675 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_buf_write [2024-11-19 02:10:36,675 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2024-11-19 02:10:36,675 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2024-11-19 02:10:36,676 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2024-11-19 02:10:36,676 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#3 [2024-11-19 02:10:36,676 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#4 [2024-11-19 02:10:36,676 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#5 [2024-11-19 02:10:36,676 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#6 [2024-11-19 02:10:36,676 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2024-11-19 02:10:36,676 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2024-11-19 02:10:36,676 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2024-11-19 02:10:36,676 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2024-11-19 02:10:36,677 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-19 02:10:36,677 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-19 02:10:36,677 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-19 02:10:36,677 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-11-19 02:10:36,677 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-11-19 02:10:36,677 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2024-11-19 02:10:36,677 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#6 [2024-11-19 02:10:36,677 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~real#0 [2024-11-19 02:10:36,677 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~real#1 [2024-11-19 02:10:36,678 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~real#2 [2024-11-19 02:10:36,678 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~real#3 [2024-11-19 02:10:36,678 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~real#4 [2024-11-19 02:10:36,678 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~real#5 [2024-11-19 02:10:36,678 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~real#6 [2024-11-19 02:10:36,678 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-19 02:10:36,680 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-19 02:10:36,680 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-19 02:10:36,680 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-11-19 02:10:36,680 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-11-19 02:10:36,680 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2024-11-19 02:10:36,680 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#6 [2024-11-19 02:10:36,987 INFO L238 CfgBuilder]: Building ICFG [2024-11-19 02:10:36,990 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-19 02:10:44,407 INFO L? ?]: Removed 251 outVars from TransFormulas that were not future-live. [2024-11-19 02:10:44,408 INFO L287 CfgBuilder]: Performing block encoding [2024-11-19 02:10:44,423 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-19 02:10:44,423 INFO L316 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-19 02:10:44,424 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:10:44 BoogieIcfgContainer [2024-11-19 02:10:44,424 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-19 02:10:44,425 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-19 02:10:44,425 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-19 02:10:44,429 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-19 02:10:44,429 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 02:10:34" (1/3) ... [2024-11-19 02:10:44,430 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6bfb28c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 02:10:44, skipping insertion in model container [2024-11-19 02:10:44,430 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:10:36" (2/3) ... [2024-11-19 02:10:44,431 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6bfb28c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 02:10:44, skipping insertion in model container [2024-11-19 02:10:44,431 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:10:44" (3/3) ... [2024-11-19 02:10:44,432 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_byte_buf_write_from_whole_string_harness.i [2024-11-19 02:10:44,444 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-19 02:10:44,444 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-19 02:10:44,494 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-19 02:10:44,500 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@6ba4b18d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-19 02:10:44,500 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-19 02:10:44,505 INFO L276 IsEmpty]: Start isEmpty. Operand has 181 states, 118 states have (on average 1.2627118644067796) internal successors, (149), 119 states have internal predecessors, (149), 48 states have call successors, (48), 13 states have call predecessors, (48), 13 states have return successors, (48), 48 states have call predecessors, (48), 48 states have call successors, (48) [2024-11-19 02:10:44,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2024-11-19 02:10:44,517 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 02:10:44,518 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 02:10:44,519 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 02:10:44,523 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 02:10:44,524 INFO L85 PathProgramCache]: Analyzing trace with hash -1996143641, now seen corresponding path program 1 times [2024-11-19 02:10:44,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 02:10:44,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261255021] [2024-11-19 02:10:44,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 02:10:44,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 02:11:55,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 02:11:56,388 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-19 02:11:56,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 02:11:56,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261255021] [2024-11-19 02:11:56,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261255021] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 02:11:56,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2247663] [2024-11-19 02:11:56,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 02:11:56,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 02:11:56,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 02:11:56,392 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 02:11:56,394 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process