./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursive-simple/afterrec_2calls-2.c --full-output --witness-type correctness_witness --validate ../results/automizer-verification-files/SV-COMP24_unreach-call/afterrec_2calls-2.yml/witness-2.1.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version de325976 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReachWitnessValidation.xml -i ../sv-benchmarks/c/recursive-simple/afterrec_2calls-2.c ../results/automizer-verification-files/SV-COMP24_unreach-call/afterrec_2calls-2.yml/witness-2.1.yml -s /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.positions.where.we.compute.the.hoare.annotation None --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.dk.referee-eval-de32597-m [2024-09-17 19:52:17,917 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-17 19:52:17,959 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-17 19:52:17,962 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-17 19:52:17,962 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-17 19:52:17,976 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-17 19:52:17,977 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-17 19:52:17,977 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-17 19:52:17,977 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-17 19:52:17,977 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-17 19:52:17,978 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-17 19:52:17,978 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-17 19:52:17,978 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-17 19:52:17,979 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-17 19:52:17,979 INFO L153 SettingsManager]: * Use SBE=true [2024-09-17 19:52:17,979 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-17 19:52:17,979 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-17 19:52:17,980 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-17 19:52:17,980 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-17 19:52:17,980 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-17 19:52:17,981 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-17 19:52:17,981 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-17 19:52:17,981 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-17 19:52:17,982 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-17 19:52:17,982 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-17 19:52:17,982 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-17 19:52:17,982 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-17 19:52:17,983 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-17 19:52:17,983 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-17 19:52:17,983 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-17 19:52:17,983 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-17 19:52:17,984 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-17 19:52:17,984 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-17 19:52:17,984 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-17 19:52:17,984 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-17 19:52:17,984 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-17 19:52:17,985 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-17 19:52:17,985 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-17 19:52:17,985 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-17 19:52:17,985 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-17 19:52:17,985 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-17 19:52:17,987 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-17 19:52:17,988 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/certificate-witnesses-artifact/automizer/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> None [2024-09-17 19:52:18,156 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-17 19:52:18,172 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-17 19:52:18,174 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-17 19:52:18,175 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-09-17 19:52:18,176 INFO L274 PluginConnector]: Witness Parser initialized [2024-09-17 19:52:18,176 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../results/automizer-verification-files/SV-COMP24_unreach-call/afterrec_2calls-2.yml/witness-2.1.yml [2024-09-17 19:52:18,219 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-17 19:52:18,220 INFO L274 PluginConnector]: CDTParser initialized [2024-09-17 19:52:18,221 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/recursive-simple/afterrec_2calls-2.c [2024-09-17 19:52:19,485 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-17 19:52:19,640 INFO L384 CDTParser]: Found 1 translation units. [2024-09-17 19:52:19,641 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursive-simple/afterrec_2calls-2.c [2024-09-17 19:52:19,646 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/44edb07c3/8d76c6e5314e48dbb679a08a9fb1adda/FLAG54fbeba4b [2024-09-17 19:52:20,048 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/44edb07c3/8d76c6e5314e48dbb679a08a9fb1adda [2024-09-17 19:52:20,049 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-17 19:52:20,050 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-09-17 19:52:20,051 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-17 19:52:20,051 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-17 19:52:20,055 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-17 19:52:20,055 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness-2.1.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 17.09 07:52:18" (1/2) ... [2024-09-17 19:52:20,056 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@555cd491 and model type witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 17.09 07:52:20, skipping insertion in model container [2024-09-17 19:52:20,056 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness-2.1.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 17.09 07:52:18" (1/2) ... [2024-09-17 19:52:20,059 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@5dbe4208 and model type witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 17.09 07:52:20, skipping insertion in model container [2024-09-17 19:52:20,059 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.09 07:52:20" (2/2) ... [2024-09-17 19:52:20,059 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@555cd491 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 07:52:20, skipping insertion in model container [2024-09-17 19:52:20,059 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.09 07:52:20" (2/2) ... [2024-09-17 19:52:20,066 INFO L93 nessWitnessExtractor]: Found the following entries in the witness: [2024-09-17 19:52:20,067 INFO L1541 ArrayList]: Function contract at [L8]: requires (\old(n) == 2), ensures (\old(n) == 2) [2024-09-17 19:52:20,067 INFO L1541 ArrayList]: Function contract at [L15]: requires 0, ensures 0 [2024-09-17 19:52:20,078 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-17 19:52:20,200 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursive-simple/afterrec_2calls-2.c[354,367] [2024-09-17 19:52:20,207 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursive-simple/afterrec_2calls-2.c[442,455] [2024-09-17 19:52:20,211 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-17 19:52:20,223 INFO L200 MainTranslator]: Completed pre-run Start Parsing Global Start Parsing Global [2024-09-17 19:52:20,254 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursive-simple/afterrec_2calls-2.c[354,367] Start Parsing Global Start Parsing Global [2024-09-17 19:52:20,256 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursive-simple/afterrec_2calls-2.c[442,455] [2024-09-17 19:52:20,257 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-17 19:52:20,268 INFO L204 MainTranslator]: Completed translation [2024-09-17 19:52:20,268 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 07:52:20 WrapperNode [2024-09-17 19:52:20,269 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-17 19:52:20,269 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-17 19:52:20,270 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-17 19:52:20,270 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-17 19:52:20,275 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 07:52:20" (1/1) ... [2024-09-17 19:52:20,280 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 07:52:20" (1/1) ... [2024-09-17 19:52:20,289 INFO L138 Inliner]: procedures = 13, calls = 10, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 10 [2024-09-17 19:52:20,290 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-17 19:52:20,290 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-17 19:52:20,290 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-17 19:52:20,290 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-17 19:52:20,297 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 07:52:20" (1/1) ... [2024-09-17 19:52:20,297 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 07:52:20" (1/1) ... [2024-09-17 19:52:20,298 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 07:52:20" (1/1) ... [2024-09-17 19:52:20,302 WARN L109 MemorySlicer]: Omit memory slicing because it failed with the following exception: Unsupported: Procedure f is not part of the Ultimate memory model but has specification other that is not a ModifiesSpecification [2024-09-17 19:52:20,303 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 07:52:20" (1/1) ... [2024-09-17 19:52:20,303 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 07:52:20" (1/1) ... [2024-09-17 19:52:20,305 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 07:52:20" (1/1) ... [2024-09-17 19:52:20,306 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 07:52:20" (1/1) ... [2024-09-17 19:52:20,306 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 07:52:20" (1/1) ... [2024-09-17 19:52:20,307 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 07:52:20" (1/1) ... [2024-09-17 19:52:20,308 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-17 19:52:20,308 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-17 19:52:20,308 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-17 19:52:20,308 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-17 19:52:20,309 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 07:52:20" (1/1) ... [2024-09-17 19:52:20,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-17 19:52:20,318 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 19:52:20,329 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-09-17 19:52:20,330 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-09-17 19:52:20,402 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-17 19:52:20,402 INFO L130 BoogieDeclarations]: Found specification of procedure f [2024-09-17 19:52:20,402 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2024-09-17 19:52:20,402 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-17 19:52:20,403 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-17 19:52:20,403 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-09-17 19:52:20,403 INFO L130 BoogieDeclarations]: Found specification of procedure f2 [2024-09-17 19:52:20,403 INFO L138 BoogieDeclarations]: Found implementation of procedure f2 [2024-09-17 19:52:20,446 INFO L242 CfgBuilder]: Building ICFG [2024-09-17 19:52:20,448 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-17 19:52:20,450 WARN L783 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2024-09-17 19:52:20,511 WARN L783 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2024-09-17 19:52:20,525 INFO L? ?]: Removed 6 outVars from TransFormulas that were not future-live. [2024-09-17 19:52:20,526 INFO L291 CfgBuilder]: Performing block encoding [2024-09-17 19:52:20,542 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-17 19:52:20,542 INFO L318 CfgBuilder]: Removed 0 assume(true) statements. [2024-09-17 19:52:20,543 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.09 07:52:20 BoogieIcfgContainer [2024-09-17 19:52:20,543 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-17 19:52:20,544 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-17 19:52:20,545 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-17 19:52:20,547 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-17 19:52:20,547 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness-2.1.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 17.09 07:52:18" (1/4) ... [2024-09-17 19:52:20,547 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d3db2ec and model type witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 17.09 07:52:20, skipping insertion in model container [2024-09-17 19:52:20,547 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.09 07:52:20" (2/4) ... [2024-09-17 19:52:20,548 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d3db2ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.09 07:52:20, skipping insertion in model container [2024-09-17 19:52:20,548 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 07:52:20" (3/4) ... [2024-09-17 19:52:20,548 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d3db2ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.09 07:52:20, skipping insertion in model container [2024-09-17 19:52:20,548 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.09 07:52:20" (4/4) ... [2024-09-17 19:52:20,549 INFO L112 eAbstractionObserver]: Analyzing ICFG afterrec_2calls-2.c [2024-09-17 19:52:20,560 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-17 19:52:20,560 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 7 error locations. [2024-09-17 19:52:20,605 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-17 19:52:20,613 INFO L336 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=None, 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;@49e89d97, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-17 19:52:20,613 INFO L337 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2024-09-17 19:52:20,616 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 17 states have internal predecessors, (19), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-17 19:52:20,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2024-09-17 19:52:20,620 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 19:52:20,621 INFO L216 NwaCegarLoop]: trace histogram [1, 1] [2024-09-17 19:52:20,621 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONPRE_CONDITION === [fErr0REQUIRES_VIOLATIONPRE_CONDITION, fErr1ASSERT_VIOLATIONERROR_FUNCTION, fErr2ENSURES_VIOLATIONPOST_CONDITION, ULTIMATE.startErr0REQUIRES_VIOLATIONPRE_CONDITION (and 3 more)] === [2024-09-17 19:52:20,633 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:52:20,633 INFO L85 PathProgramCache]: Analyzing trace with hash 2249, now seen corresponding path program 1 times [2024-09-17 19:52:20,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 19:52:20,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807979092] [2024-09-17 19:52:20,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:52:20,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 19:52:20,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:20,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-17 19:52:20,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 19:52:20,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807979092] [2024-09-17 19:52:20,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807979092] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-17 19:52:20,741 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-17 19:52:20,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-09-17 19:52:20,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563316996] [2024-09-17 19:52:20,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-17 19:52:20,746 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-09-17 19:52:20,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 19:52:20,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-09-17 19:52:20,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-17 19:52:20,775 INFO L87 Difference]: Start difference. First operand has 23 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 17 states have internal predecessors, (19), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 1 states have (on average 2.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-17 19:52:20,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 19:52:20,791 INFO L93 Difference]: Finished difference Result 12 states and 11 transitions. [2024-09-17 19:52:20,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-17 19:52:20,793 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 1 states have (on average 2.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2024-09-17 19:52:20,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 19:52:20,797 INFO L225 Difference]: With dead ends: 12 [2024-09-17 19:52:20,797 INFO L226 Difference]: Without dead ends: 8 [2024-09-17 19:52:20,799 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-17 19:52:20,801 INFO L434 NwaCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-17 19:52:20,801 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-17 19:52:20,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2024-09-17 19:52:20,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2024-09-17 19:52:20,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 5 states have (on average 1.2) internal successors, (6), 6 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-17 19:52:20,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 7 transitions. [2024-09-17 19:52:20,822 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 7 transitions. Word has length 2 [2024-09-17 19:52:20,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 19:52:20,823 INFO L474 AbstractCegarLoop]: Abstraction has 8 states and 7 transitions. [2024-09-17 19:52:20,823 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 1 states have (on average 2.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-17 19:52:20,823 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 7 transitions. [2024-09-17 19:52:20,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2024-09-17 19:52:20,824 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 19:52:20,825 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2024-09-17 19:52:20,825 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-17 19:52:20,825 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting fErr2ENSURES_VIOLATIONPOST_CONDITION === [fErr0REQUIRES_VIOLATIONPRE_CONDITION, fErr1ASSERT_VIOLATIONERROR_FUNCTION, fErr2ENSURES_VIOLATIONPOST_CONDITION, ULTIMATE.startErr0REQUIRES_VIOLATIONPRE_CONDITION (and 3 more)] === [2024-09-17 19:52:20,826 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:52:20,828 INFO L85 PathProgramCache]: Analyzing trace with hash 67604564, now seen corresponding path program 1 times [2024-09-17 19:52:20,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 19:52:20,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364682831] [2024-09-17 19:52:20,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:52:20,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 19:52:20,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:20,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-17 19:52:20,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 19:52:20,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364682831] [2024-09-17 19:52:20,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364682831] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-17 19:52:20,892 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-17 19:52:20,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-17 19:52:20,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706779535] [2024-09-17 19:52:20,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-17 19:52:20,895 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-09-17 19:52:20,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 19:52:20,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-09-17 19:52:20,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-17 19:52:20,897 INFO L87 Difference]: Start difference. First operand 8 states and 7 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-17 19:52:20,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 19:52:20,904 INFO L93 Difference]: Finished difference Result 7 states and 6 transitions. [2024-09-17 19:52:20,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-09-17 19:52:20,905 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2024-09-17 19:52:20,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 19:52:20,905 INFO L225 Difference]: With dead ends: 7 [2024-09-17 19:52:20,906 INFO L226 Difference]: Without dead ends: 6 [2024-09-17 19:52:20,906 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-17 19:52:20,907 INFO L434 NwaCegarLoop]: 4 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-17 19:52:20,908 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 4 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-17 19:52:20,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2024-09-17 19:52:20,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2024-09-17 19:52:20,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6 states, 4 states have (on average 1.0) internal successors, (4), 4 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-17 19:52:20,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 5 transitions. [2024-09-17 19:52:20,910 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 5 transitions. Word has length 5 [2024-09-17 19:52:20,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 19:52:20,911 INFO L474 AbstractCegarLoop]: Abstraction has 6 states and 5 transitions. [2024-09-17 19:52:20,911 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-17 19:52:20,911 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 5 transitions. [2024-09-17 19:52:20,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2024-09-17 19:52:20,911 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 19:52:20,911 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2024-09-17 19:52:20,912 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-17 19:52:20,912 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting fErr0REQUIRES_VIOLATIONPRE_CONDITION === [fErr0REQUIRES_VIOLATIONPRE_CONDITION, fErr1ASSERT_VIOLATIONERROR_FUNCTION, fErr2ENSURES_VIOLATIONPOST_CONDITION, ULTIMATE.startErr0REQUIRES_VIOLATIONPRE_CONDITION (and 3 more)] === [2024-09-17 19:52:20,912 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:52:20,912 INFO L85 PathProgramCache]: Analyzing trace with hash 67604590, now seen corresponding path program 1 times [2024-09-17 19:52:20,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 19:52:20,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225566694] [2024-09-17 19:52:20,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:52:20,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 19:52:20,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:21,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-17 19:52:21,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 19:52:21,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225566694] [2024-09-17 19:52:21,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225566694] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-17 19:52:21,017 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-17 19:52:21,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-09-17 19:52:21,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451931663] [2024-09-17 19:52:21,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-17 19:52:21,018 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-09-17 19:52:21,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 19:52:21,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-09-17 19:52:21,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-09-17 19:52:21,019 INFO L87 Difference]: Start difference. First operand 6 states and 5 transitions. Second operand has 4 states, 4 states have (on average 1.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-17 19:52:21,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 19:52:21,045 INFO L93 Difference]: Finished difference Result 4 states and 3 transitions. [2024-09-17 19:52:21,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-09-17 19:52:21,046 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2024-09-17 19:52:21,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 19:52:21,047 INFO L225 Difference]: With dead ends: 4 [2024-09-17 19:52:21,047 INFO L226 Difference]: Without dead ends: 0 [2024-09-17 19:52:21,047 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-09-17 19:52:21,048 INFO L434 NwaCegarLoop]: 1 mSDtfsCounter, 1 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-17 19:52:21,048 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 2 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-17 19:52:21,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2024-09-17 19:52:21,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2024-09-17 19:52:21,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-17 19:52:21,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2024-09-17 19:52:21,049 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 5 [2024-09-17 19:52:21,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 19:52:21,051 INFO L474 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-09-17 19:52:21,051 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-17 19:52:21,051 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2024-09-17 19:52:21,051 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2024-09-17 19:52:21,053 INFO L785 garLoopResultBuilder]: Registering result SAFE for location fErr0REQUIRES_VIOLATIONPRE_CONDITION (6 of 7 remaining) [2024-09-17 19:52:21,054 INFO L785 garLoopResultBuilder]: Registering result SAFE for location fErr1ASSERT_VIOLATIONERROR_FUNCTION (5 of 7 remaining) [2024-09-17 19:52:21,055 INFO L785 garLoopResultBuilder]: Registering result SAFE for location fErr2ENSURES_VIOLATIONPOST_CONDITION (4 of 7 remaining) [2024-09-17 19:52:21,055 INFO L785 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONPRE_CONDITION (3 of 7 remaining) [2024-09-17 19:52:21,055 INFO L785 garLoopResultBuilder]: Registering result SAFE for location f2Err0REQUIRES_VIOLATIONPRE_CONDITION (2 of 7 remaining) [2024-09-17 19:52:21,055 INFO L785 garLoopResultBuilder]: Registering result SAFE for location f2Err1ASSERT_VIOLATIONERROR_FUNCTION (1 of 7 remaining) [2024-09-17 19:52:21,055 INFO L785 garLoopResultBuilder]: Registering result SAFE for location f2Err2ENSURES_VIOLATIONPOST_CONDITION (0 of 7 remaining) [2024-09-17 19:52:21,055 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-09-17 19:52:21,057 INFO L408 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2024-09-17 19:52:21,059 INFO L165 ceAbstractionStarter]: Computing trace abstraction results [2024-09-17 19:52:21,063 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.09 07:52:21 BoogieIcfgContainer [2024-09-17 19:52:21,064 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-09-17 19:52:21,065 INFO L158 Benchmark]: Toolchain (without parser) took 1015.20ms. Allocated memory is still 178.3MB. Free memory was 108.4MB in the beginning and 139.1MB in the end (delta: -30.7MB). There was no memory consumed. Max. memory is 16.1GB. [2024-09-17 19:52:21,065 INFO L158 Benchmark]: Witness Parser took 0.17ms. Allocated memory is still 178.3MB. Free memory was 137.1MB in the beginning and 136.9MB in the end (delta: 174.8kB). There was no memory consumed. Max. memory is 16.1GB. [2024-09-17 19:52:21,065 INFO L158 Benchmark]: CDTParser took 0.76ms. Allocated memory is still 178.3MB. Free memory is still 135.0MB. There was no memory consumed. Max. memory is 16.1GB. [2024-09-17 19:52:21,065 INFO L158 Benchmark]: CACSL2BoogieTranslator took 217.87ms. Allocated memory is still 178.3MB. Free memory was 108.2MB in the beginning and 95.4MB in the end (delta: 12.8MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2024-09-17 19:52:21,065 INFO L158 Benchmark]: Boogie Procedure Inliner took 20.36ms. Allocated memory is still 178.3MB. Free memory was 95.4MB in the beginning and 94.0MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-09-17 19:52:21,066 INFO L158 Benchmark]: Boogie Preprocessor took 17.45ms. Allocated memory is still 178.3MB. Free memory was 94.0MB in the beginning and 92.6MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. [2024-09-17 19:52:21,066 INFO L158 Benchmark]: RCFGBuilder took 234.94ms. Allocated memory is still 178.3MB. Free memory was 92.6MB in the beginning and 141.1MB in the end (delta: -48.5MB). Peak memory consumption was 8.8MB. Max. memory is 16.1GB. [2024-09-17 19:52:21,066 INFO L158 Benchmark]: TraceAbstraction took 520.10ms. Allocated memory is still 178.3MB. Free memory was 140.2MB in the beginning and 139.1MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. [2024-09-17 19:52:21,068 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Witness Parser took 0.17ms. Allocated memory is still 178.3MB. Free memory was 137.1MB in the beginning and 136.9MB in the end (delta: 174.8kB). There was no memory consumed. Max. memory is 16.1GB. * CDTParser took 0.76ms. Allocated memory is still 178.3MB. Free memory is still 135.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 217.87ms. Allocated memory is still 178.3MB. Free memory was 108.2MB in the beginning and 95.4MB in the end (delta: 12.8MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 20.36ms. Allocated memory is still 178.3MB. Free memory was 95.4MB in the beginning and 94.0MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 17.45ms. Allocated memory is still 178.3MB. Free memory was 94.0MB in the beginning and 92.6MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 234.94ms. Allocated memory is still 178.3MB. Free memory was 92.6MB in the beginning and 141.1MB in the end (delta: -48.5MB). Peak memory consumption was 8.8MB. Max. memory is 16.1GB. * TraceAbstraction took 520.10ms. Allocated memory is still 178.3MB. Free memory was 140.2MB in the beginning and 139.1MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 15]: procedure precondition always holds For all program executions holds that procedure precondition always holds at this location - PositiveResult [Line: 12]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - PositiveResult [Line: 8]: procedure postcondition always holds For all program executions holds that procedure postcondition always holds at this location - PositiveResult [Line: 8]: procedure precondition always holds For all program executions holds that procedure precondition always holds at this location - PositiveResult [Line: 8]: procedure precondition always holds For all program executions holds that procedure precondition always holds at this location - PositiveResult [Line: 19]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - PositiveResult [Line: 15]: procedure postcondition always holds For all program executions holds that procedure postcondition always holds at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 23 locations, 7 error locations. Started 1 CEGAR loops. OverallTime: 0.5s, OverallIterations: 3, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 3 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 3 mSDsluCounter, 14 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1 mSDsCounter, 0 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 10 IncrementalHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 0 mSolverCounterUnsat, 13 mSDtfsCounter, 10 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=23occurred in iteration=0, InterpolantAutomatonStates: 9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 12 NumberOfCodeBlocks, 12 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 9 ConstructedInterpolants, 0 QuantifiedInterpolants, 19 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 7 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2024-09-17 19:52:21,092 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE