./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memcleanup.prp --file ../sv-benchmarks/c/verifythis/tree_del_rec.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (memcleanup) Using default analysis Version 551b0097 Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/verifythis/tree_del_rec.c -s /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-MemCleanup-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-memcleanup) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 448d6e9f7f0c094a8335d652a2766ae983308e33ec1a543ceaed97ae79744722 --- Real Ultimate output --- This is Ultimate 0.3.0-?-551b009-m [2025-01-09 21:43:38,960 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-01-09 21:43:39,009 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-MemCleanup-32bit-Automizer_Default.epf [2025-01-09 21:43:39,013 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-01-09 21:43:39,013 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-01-09 21:43:39,028 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-01-09 21:43:39,028 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-01-09 21:43:39,028 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-01-09 21:43:39,029 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-01-09 21:43:39,029 INFO L153 SettingsManager]: * Use memory slicer=true [2025-01-09 21:43:39,029 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-01-09 21:43:39,029 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-01-09 21:43:39,029 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-01-09 21:43:39,029 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-01-09 21:43:39,029 INFO L153 SettingsManager]: * Use SBE=true [2025-01-09 21:43:39,029 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-01-09 21:43:39,029 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-01-09 21:43:39,029 INFO L153 SettingsManager]: * sizeof long=4 [2025-01-09 21:43:39,029 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-01-09 21:43:39,029 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-01-09 21:43:39,029 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-01-09 21:43:39,030 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-01-09 21:43:39,030 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2025-01-09 21:43:39,030 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2025-01-09 21:43:39,030 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-01-09 21:43:39,030 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-01-09 21:43:39,030 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2025-01-09 21:43:39,030 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-01-09 21:43:39,030 INFO L153 SettingsManager]: * sizeof long double=12 [2025-01-09 21:43:39,030 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-01-09 21:43:39,030 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-01-09 21:43:39,030 INFO L153 SettingsManager]: * Use constant arrays=true [2025-01-09 21:43:39,030 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-01-09 21:43:39,030 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-01-09 21:43:39,030 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-01-09 21:43:39,030 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-01-09 21:43:39,030 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-09 21:43:39,030 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2025-01-09 21:43:39,030 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-01-09 21:43:39,030 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-01-09 21:43:39,031 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-01-09 21:43:39,031 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-09 21:43:39,031 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-01-09 21:43:39,031 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-01-09 21:43:39,031 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-01-09 21:43:39,031 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-01-09 21:43:39,031 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-01-09 21:43:39,031 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-01-09 21:43:39,031 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-01-09 21:43:39,031 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-01-09 21:43:39,031 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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-jdk21/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 valid-memcleanup) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 448d6e9f7f0c094a8335d652a2766ae983308e33ec1a543ceaed97ae79744722 [2025-01-09 21:43:39,229 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-01-09 21:43:39,235 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-01-09 21:43:39,236 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-01-09 21:43:39,237 INFO L270 PluginConnector]: Initializing CDTParser... [2025-01-09 21:43:39,237 INFO L274 PluginConnector]: CDTParser initialized [2025-01-09 21:43:39,238 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/verifythis/tree_del_rec.c [2025-01-09 21:43:40,356 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/941469ae1/d6911cb8666442ef9c26b381d02c56c2/FLAG6b52f0e11 [2025-01-09 21:43:40,632 INFO L384 CDTParser]: Found 1 translation units. [2025-01-09 21:43:40,633 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/verifythis/tree_del_rec.c [2025-01-09 21:43:40,641 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/941469ae1/d6911cb8666442ef9c26b381d02c56c2/FLAG6b52f0e11 [2025-01-09 21:43:40,948 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/941469ae1/d6911cb8666442ef9c26b381d02c56c2 [2025-01-09 21:43:40,951 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-01-09 21:43:40,954 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-01-09 21:43:40,956 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-01-09 21:43:40,959 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-01-09 21:43:40,962 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-01-09 21:43:40,965 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.01 09:43:40" (1/1) ... [2025-01-09 21:43:40,965 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2992ca7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 09:43:40, skipping insertion in model container [2025-01-09 21:43:40,966 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.01 09:43:40" (1/1) ... [2025-01-09 21:43:40,988 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-01-09 21:43:41,177 WARN L1100 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2025-01-09 21:43:41,185 WARN L1731 CHandler]: Possible shadowing of function min [2025-01-09 21:43:41,191 WARN L1731 CHandler]: Possible shadowing of function min [2025-01-09 21:43:41,212 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-01-09 21:43:41,229 INFO L200 MainTranslator]: Completed pre-run [2025-01-09 21:43:41,239 WARN L1731 CHandler]: Possible shadowing of function min [2025-01-09 21:43:41,240 WARN L1731 CHandler]: Possible shadowing of function min [2025-01-09 21:43:41,245 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-01-09 21:43:41,266 INFO L204 MainTranslator]: Completed translation [2025-01-09 21:43:41,266 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 09:43:41 WrapperNode [2025-01-09 21:43:41,266 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-01-09 21:43:41,267 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-01-09 21:43:41,267 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-01-09 21:43:41,267 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-01-09 21:43:41,276 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 09:43:41" (1/1) ... [2025-01-09 21:43:41,284 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 09:43:41" (1/1) ... [2025-01-09 21:43:41,302 INFO L138 Inliner]: procedures = 29, calls = 62, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 72 [2025-01-09 21:43:41,303 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-01-09 21:43:41,303 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-01-09 21:43:41,304 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-01-09 21:43:41,304 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-01-09 21:43:41,309 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 09:43:41" (1/1) ... [2025-01-09 21:43:41,310 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 09:43:41" (1/1) ... [2025-01-09 21:43:41,312 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 09:43:41" (1/1) ... [2025-01-09 21:43:41,331 INFO L175 MemorySlicer]: Split 25 memory accesses to 4 slices as follows [2, 2, 5, 16]. 64 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0]. The 7 writes are split as follows [0, 1, 2, 4]. [2025-01-09 21:43:41,334 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 09:43:41" (1/1) ... [2025-01-09 21:43:41,334 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 09:43:41" (1/1) ... [2025-01-09 21:43:41,340 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 09:43:41" (1/1) ... [2025-01-09 21:43:41,340 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 09:43:41" (1/1) ... [2025-01-09 21:43:41,342 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 09:43:41" (1/1) ... [2025-01-09 21:43:41,343 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 09:43:41" (1/1) ... [2025-01-09 21:43:41,344 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 09:43:41" (1/1) ... [2025-01-09 21:43:41,346 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-01-09 21:43:41,347 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2025-01-09 21:43:41,347 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2025-01-09 21:43:41,347 INFO L274 PluginConnector]: RCFGBuilder initialized [2025-01-09 21:43:41,347 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 09:43:41" (1/1) ... [2025-01-09 21:43:41,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-09 21:43:41,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 21:43:41,377 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-01-09 21:43:41,385 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-01-09 21:43:41,400 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-01-09 21:43:41,400 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2025-01-09 21:43:41,400 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2025-01-09 21:43:41,400 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2025-01-09 21:43:41,400 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2025-01-09 21:43:41,401 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#3 [2025-01-09 21:43:41,401 INFO L130 BoogieDeclarations]: Found specification of procedure tree_del [2025-01-09 21:43:41,401 INFO L138 BoogieDeclarations]: Found implementation of procedure tree_del [2025-01-09 21:43:41,401 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-01-09 21:43:41,401 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-01-09 21:43:41,401 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2025-01-09 21:43:41,401 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2025-01-09 21:43:41,401 INFO L130 BoogieDeclarations]: Found specification of procedure min [2025-01-09 21:43:41,401 INFO L138 BoogieDeclarations]: Found implementation of procedure min [2025-01-09 21:43:41,401 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-01-09 21:43:41,401 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-01-09 21:43:41,401 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2025-01-09 21:43:41,402 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2025-01-09 21:43:41,402 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2025-01-09 21:43:41,402 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2025-01-09 21:43:41,402 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2025-01-09 21:43:41,402 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2025-01-09 21:43:41,402 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2025-01-09 21:43:41,402 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#3 [2025-01-09 21:43:41,402 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_tree [2025-01-09 21:43:41,402 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_tree [2025-01-09 21:43:41,402 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-01-09 21:43:41,402 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-01-09 21:43:41,402 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2025-01-09 21:43:41,402 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2025-01-09 21:43:41,402 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-01-09 21:43:41,403 INFO L130 BoogieDeclarations]: Found specification of procedure size [2025-01-09 21:43:41,403 INFO L138 BoogieDeclarations]: Found implementation of procedure size [2025-01-09 21:43:41,403 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-01-09 21:43:41,403 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-01-09 21:43:41,403 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2025-01-09 21:43:41,403 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2025-01-09 21:43:41,403 INFO L130 BoogieDeclarations]: Found specification of procedure tree_inorder [2025-01-09 21:43:41,403 INFO L138 BoogieDeclarations]: Found implementation of procedure tree_inorder [2025-01-09 21:43:41,403 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2025-01-09 21:43:41,513 INFO L234 CfgBuilder]: Building ICFG [2025-01-09 21:43:41,514 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2025-01-09 21:43:41,710 INFO L? ?]: Removed 61 outVars from TransFormulas that were not future-live. [2025-01-09 21:43:41,710 INFO L283 CfgBuilder]: Performing block encoding [2025-01-09 21:43:41,717 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-01-09 21:43:41,717 INFO L312 CfgBuilder]: Removed 1 assume(true) statements. [2025-01-09 21:43:41,718 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.01 09:43:41 BoogieIcfgContainer [2025-01-09 21:43:41,718 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2025-01-09 21:43:41,719 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-01-09 21:43:41,719 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-01-09 21:43:41,722 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-01-09 21:43:41,722 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.01 09:43:40" (1/3) ... [2025-01-09 21:43:41,723 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2375f284 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.01 09:43:41, skipping insertion in model container [2025-01-09 21:43:41,723 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 09:43:41" (2/3) ... [2025-01-09 21:43:41,723 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2375f284 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.01 09:43:41, skipping insertion in model container [2025-01-09 21:43:41,723 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.01 09:43:41" (3/3) ... [2025-01-09 21:43:41,724 INFO L128 eAbstractionObserver]: Analyzing ICFG tree_del_rec.c [2025-01-09 21:43:41,733 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-01-09 21:43:41,735 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG tree_del_rec.c that has 8 procedures, 87 locations, 1 initial locations, 2 loop locations, and 2 error locations. [2025-01-09 21:43:41,760 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-01-09 21:43:41,768 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=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;@24c9b819, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-01-09 21:43:41,768 INFO L334 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2025-01-09 21:43:41,771 INFO L276 IsEmpty]: Start isEmpty. Operand has 87 states, 55 states have (on average 1.2363636363636363) internal successors, (68), 57 states have internal predecessors, (68), 22 states have call successors, (22), 7 states have call predecessors, (22), 7 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2025-01-09 21:43:41,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2025-01-09 21:43:41,777 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 21:43:41,777 INFO L218 NwaCegarLoop]: trace histogram [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] [2025-01-09 21:43:41,777 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK] === [2025-01-09 21:43:41,781 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 21:43:41,781 INFO L85 PathProgramCache]: Analyzing trace with hash 1039604916, now seen corresponding path program 1 times [2025-01-09 21:43:41,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 21:43:41,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140938954] [2025-01-09 21:43:41,787 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 21:43:41,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 21:43:41,845 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 37 statements into 1 equivalence classes. [2025-01-09 21:43:41,872 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 37 of 37 statements. [2025-01-09 21:43:41,872 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 21:43:41,872 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 21:43:42,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 21:43:42,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 21:43:42,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140938954] [2025-01-09 21:43:42,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140938954] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 21:43:42,105 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-09 21:43:42,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-01-09 21:43:42,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207315112] [2025-01-09 21:43:42,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 21:43:42,109 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-01-09 21:43:42,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 21:43:42,146 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-01-09 21:43:42,146 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-01-09 21:43:42,148 INFO L87 Difference]: Start difference. First operand has 87 states, 55 states have (on average 1.2363636363636363) internal successors, (68), 57 states have internal predecessors, (68), 22 states have call successors, (22), 7 states have call predecessors, (22), 7 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2025-01-09 21:43:42,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 21:43:42,186 INFO L93 Difference]: Finished difference Result 90 states and 116 transitions. [2025-01-09 21:43:42,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-01-09 21:43:42,189 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 37 [2025-01-09 21:43:42,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 21:43:42,195 INFO L225 Difference]: With dead ends: 90 [2025-01-09 21:43:42,195 INFO L226 Difference]: Without dead ends: 85 [2025-01-09 21:43:42,196 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-01-09 21:43:42,200 INFO L435 NwaCegarLoop]: 107 mSDtfsCounter, 0 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 419 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-01-09 21:43:42,200 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 419 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-01-09 21:43:42,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2025-01-09 21:43:42,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2025-01-09 21:43:42,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 53 states have (on average 1.169811320754717) internal successors, (62), 55 states have internal predecessors, (62), 22 states have call successors, (22), 7 states have call predecessors, (22), 8 states have return successors, (25), 22 states have call predecessors, (25), 22 states have call successors, (25) [2025-01-09 21:43:42,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 109 transitions. [2025-01-09 21:43:42,229 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 109 transitions. Word has length 37 [2025-01-09 21:43:42,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 21:43:42,230 INFO L471 AbstractCegarLoop]: Abstraction has 85 states and 109 transitions. [2025-01-09 21:43:42,230 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2025-01-09 21:43:42,230 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 109 transitions. [2025-01-09 21:43:42,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2025-01-09 21:43:42,232 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 21:43:42,232 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 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] [2025-01-09 21:43:42,232 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-01-09 21:43:42,232 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK] === [2025-01-09 21:43:42,233 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 21:43:42,233 INFO L85 PathProgramCache]: Analyzing trace with hash 1509582345, now seen corresponding path program 1 times [2025-01-09 21:43:42,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 21:43:42,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331253344] [2025-01-09 21:43:42,233 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 21:43:42,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 21:43:42,254 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 49 statements into 1 equivalence classes. [2025-01-09 21:43:42,262 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 49 of 49 statements. [2025-01-09 21:43:42,265 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 21:43:42,265 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 21:43:42,565 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-01-09 21:43:42,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 21:43:42,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331253344] [2025-01-09 21:43:42,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331253344] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 21:43:42,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622462297] [2025-01-09 21:43:42,567 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 21:43:42,567 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 21:43:42,567 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 21:43:42,569 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 21:43:42,571 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-01-09 21:43:42,648 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 49 statements into 1 equivalence classes. [2025-01-09 21:43:42,691 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 49 of 49 statements. [2025-01-09 21:43:42,691 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 21:43:42,691 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 21:43:42,697 INFO L256 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 25 conjuncts are in the unsatisfiable core [2025-01-09 21:43:42,700 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 21:43:42,836 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-01-09 21:43:42,836 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 21:43:43,007 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-01-09 21:43:43,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1622462297] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 21:43:43,008 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 21:43:43,008 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 10 [2025-01-09 21:43:43,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262948246] [2025-01-09 21:43:43,009 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 21:43:43,009 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-01-09 21:43:43,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 21:43:43,010 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-01-09 21:43:43,010 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2025-01-09 21:43:43,010 INFO L87 Difference]: Start difference. First operand 85 states and 109 transitions. Second operand has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 5 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2025-01-09 21:43:43,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 21:43:43,083 INFO L93 Difference]: Finished difference Result 91 states and 118 transitions. [2025-01-09 21:43:43,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-01-09 21:43:43,084 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 5 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) Word has length 49 [2025-01-09 21:43:43,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 21:43:43,085 INFO L225 Difference]: With dead ends: 91 [2025-01-09 21:43:43,085 INFO L226 Difference]: Without dead ends: 87 [2025-01-09 21:43:43,085 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2025-01-09 21:43:43,086 INFO L435 NwaCegarLoop]: 101 mSDtfsCounter, 1 mSDsluCounter, 574 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 675 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-01-09 21:43:43,086 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 675 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-01-09 21:43:43,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2025-01-09 21:43:43,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2025-01-09 21:43:43,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 54 states have (on average 1.1666666666666667) internal successors, (63), 57 states have internal predecessors, (63), 22 states have call successors, (22), 7 states have call predecessors, (22), 9 states have return successors, (27), 22 states have call predecessors, (27), 22 states have call successors, (27) [2025-01-09 21:43:43,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 112 transitions. [2025-01-09 21:43:43,093 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 112 transitions. Word has length 49 [2025-01-09 21:43:43,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 21:43:43,093 INFO L471 AbstractCegarLoop]: Abstraction has 87 states and 112 transitions. [2025-01-09 21:43:43,093 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 5 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2025-01-09 21:43:43,093 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 112 transitions. [2025-01-09 21:43:43,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2025-01-09 21:43:43,094 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 21:43:43,095 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2025-01-09 21:43:43,104 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2025-01-09 21:43:43,295 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 21:43:43,295 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK] === [2025-01-09 21:43:43,296 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 21:43:43,296 INFO L85 PathProgramCache]: Analyzing trace with hash 2053555910, now seen corresponding path program 1 times [2025-01-09 21:43:43,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 21:43:43,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739040285] [2025-01-09 21:43:43,296 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 21:43:43,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 21:43:43,312 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 61 statements into 1 equivalence classes. [2025-01-09 21:43:43,325 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 61 of 61 statements. [2025-01-09 21:43:43,325 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 21:43:43,326 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 21:43:43,441 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2025-01-09 21:43:43,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 21:43:43,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739040285] [2025-01-09 21:43:43,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739040285] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 21:43:43,441 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-09 21:43:43,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2025-01-09 21:43:43,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828783384] [2025-01-09 21:43:43,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 21:43:43,442 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-01-09 21:43:43,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 21:43:43,442 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-01-09 21:43:43,442 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2025-01-09 21:43:43,442 INFO L87 Difference]: Start difference. First operand 87 states and 112 transitions. Second operand has 8 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 4 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2025-01-09 21:43:43,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 21:43:43,504 INFO L93 Difference]: Finished difference Result 89 states and 115 transitions. [2025-01-09 21:43:43,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-01-09 21:43:43,504 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 4 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 61 [2025-01-09 21:43:43,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 21:43:43,505 INFO L225 Difference]: With dead ends: 89 [2025-01-09 21:43:43,505 INFO L226 Difference]: Without dead ends: 89 [2025-01-09 21:43:43,506 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2025-01-09 21:43:43,506 INFO L435 NwaCegarLoop]: 100 mSDtfsCounter, 17 mSDsluCounter, 549 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 649 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-01-09 21:43:43,506 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 649 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-01-09 21:43:43,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2025-01-09 21:43:43,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2025-01-09 21:43:43,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 55 states have (on average 1.1636363636363636) internal successors, (64), 59 states have internal predecessors, (64), 22 states have call successors, (22), 7 states have call predecessors, (22), 10 states have return successors, (29), 22 states have call predecessors, (29), 22 states have call successors, (29) [2025-01-09 21:43:43,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 115 transitions. [2025-01-09 21:43:43,519 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 115 transitions. Word has length 61 [2025-01-09 21:43:43,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 21:43:43,520 INFO L471 AbstractCegarLoop]: Abstraction has 89 states and 115 transitions. [2025-01-09 21:43:43,520 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 4 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2025-01-09 21:43:43,520 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 115 transitions. [2025-01-09 21:43:43,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2025-01-09 21:43:43,521 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 21:43:43,521 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 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, 1, 1, 1, 1] [2025-01-09 21:43:43,522 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-01-09 21:43:43,522 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK] === [2025-01-09 21:43:43,522 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 21:43:43,525 INFO L85 PathProgramCache]: Analyzing trace with hash -87158948, now seen corresponding path program 1 times [2025-01-09 21:43:43,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 21:43:43,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299220791] [2025-01-09 21:43:43,526 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 21:43:43,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 21:43:43,545 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 74 statements into 1 equivalence classes. [2025-01-09 21:43:43,565 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 74 of 74 statements. [2025-01-09 21:43:43,566 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 21:43:43,566 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 21:43:43,800 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2025-01-09 21:43:43,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 21:43:43,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299220791] [2025-01-09 21:43:43,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299220791] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 21:43:43,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704254181] [2025-01-09 21:43:43,801 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 21:43:43,801 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 21:43:43,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 21:43:43,803 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 21:43:43,804 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-01-09 21:43:43,884 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 74 statements into 1 equivalence classes. [2025-01-09 21:43:43,920 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 74 of 74 statements. [2025-01-09 21:43:43,921 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 21:43:43,921 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 21:43:43,922 INFO L256 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 25 conjuncts are in the unsatisfiable core [2025-01-09 21:43:43,925 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 21:43:44,009 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2025-01-09 21:43:44,009 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 21:43:44,182 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2025-01-09 21:43:44,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1704254181] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 21:43:44,183 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 21:43:44,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 15 [2025-01-09 21:43:44,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965474811] [2025-01-09 21:43:44,183 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 21:43:44,183 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-01-09 21:43:44,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 21:43:44,185 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-01-09 21:43:44,185 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2025-01-09 21:43:44,186 INFO L87 Difference]: Start difference. First operand 89 states and 115 transitions. Second operand has 15 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 14 states have internal predecessors, (46), 7 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (12), 7 states have call predecessors, (12), 6 states have call successors, (12) [2025-01-09 21:43:44,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 21:43:44,367 INFO L93 Difference]: Finished difference Result 91 states and 118 transitions. [2025-01-09 21:43:44,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-01-09 21:43:44,368 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 14 states have internal predecessors, (46), 7 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (12), 7 states have call predecessors, (12), 6 states have call successors, (12) Word has length 74 [2025-01-09 21:43:44,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 21:43:44,369 INFO L225 Difference]: With dead ends: 91 [2025-01-09 21:43:44,370 INFO L226 Difference]: Without dead ends: 91 [2025-01-09 21:43:44,371 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2025-01-09 21:43:44,375 INFO L435 NwaCegarLoop]: 94 mSDtfsCounter, 35 mSDsluCounter, 832 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 926 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-01-09 21:43:44,375 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 926 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-01-09 21:43:44,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2025-01-09 21:43:44,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2025-01-09 21:43:44,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 56 states have (on average 1.1607142857142858) internal successors, (65), 61 states have internal predecessors, (65), 22 states have call successors, (22), 7 states have call predecessors, (22), 11 states have return successors, (31), 22 states have call predecessors, (31), 22 states have call successors, (31) [2025-01-09 21:43:44,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 118 transitions. [2025-01-09 21:43:44,381 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 118 transitions. Word has length 74 [2025-01-09 21:43:44,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 21:43:44,382 INFO L471 AbstractCegarLoop]: Abstraction has 91 states and 118 transitions. [2025-01-09 21:43:44,382 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 14 states have internal predecessors, (46), 7 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (12), 7 states have call predecessors, (12), 6 states have call successors, (12) [2025-01-09 21:43:44,382 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 118 transitions. [2025-01-09 21:43:44,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2025-01-09 21:43:44,383 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 21:43:44,383 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 21:43:44,394 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-01-09 21:43:44,583 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 21:43:44,584 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK] === [2025-01-09 21:43:44,584 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 21:43:44,584 INFO L85 PathProgramCache]: Analyzing trace with hash -29041489, now seen corresponding path program 1 times [2025-01-09 21:43:44,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 21:43:44,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833935451] [2025-01-09 21:43:44,585 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 21:43:44,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 21:43:44,602 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 86 statements into 1 equivalence classes. [2025-01-09 21:43:44,630 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 86 of 86 statements. [2025-01-09 21:43:44,630 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 21:43:44,630 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-01-09 21:43:44,630 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-01-09 21:43:44,637 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 86 statements into 1 equivalence classes. [2025-01-09 21:43:44,656 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 86 of 86 statements. [2025-01-09 21:43:44,657 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 21:43:44,657 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-01-09 21:43:44,681 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-01-09 21:43:44,681 INFO L340 BasicCegarLoop]: Counterexample is feasible [2025-01-09 21:43:44,681 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK (1 of 2 remaining) [2025-01-09 21:43:44,683 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK (0 of 2 remaining) [2025-01-09 21:43:44,684 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2025-01-09 21:43:44,686 INFO L422 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2025-01-09 21:43:44,731 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2025-01-09 21:43:44,733 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.01 09:43:44 BoogieIcfgContainer [2025-01-09 21:43:44,733 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2025-01-09 21:43:44,734 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2025-01-09 21:43:44,734 INFO L270 PluginConnector]: Initializing Witness Printer... [2025-01-09 21:43:44,734 INFO L274 PluginConnector]: Witness Printer initialized [2025-01-09 21:43:44,734 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.01 09:43:41" (3/4) ... [2025-01-09 21:43:44,735 INFO L140 WitnessPrinter]: Generating witness for reachability counterexample [2025-01-09 21:43:44,769 INFO L127 tionWitnessGenerator]: Generated YAML witness of length 45. [2025-01-09 21:43:44,818 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/witness.graphml [2025-01-09 21:43:44,819 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/witness.yml [2025-01-09 21:43:44,819 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2025-01-09 21:43:44,819 INFO L158 Benchmark]: Toolchain (without parser) took 3865.50ms. Allocated memory is still 142.6MB. Free memory was 112.0MB in the beginning and 102.7MB in the end (delta: 9.4MB). Peak memory consumption was 9.8MB. Max. memory is 16.1GB. [2025-01-09 21:43:44,820 INFO L158 Benchmark]: CDTParser took 0.19ms. Allocated memory is still 201.3MB. Free memory is still 122.0MB. There was no memory consumed. Max. memory is 16.1GB. [2025-01-09 21:43:44,820 INFO L158 Benchmark]: CACSL2BoogieTranslator took 310.80ms. Allocated memory is still 142.6MB. Free memory was 112.0MB in the beginning and 99.6MB in the end (delta: 12.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2025-01-09 21:43:44,820 INFO L158 Benchmark]: Boogie Procedure Inliner took 35.87ms. Allocated memory is still 142.6MB. Free memory was 99.6MB in the beginning and 98.6MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. [2025-01-09 21:43:44,820 INFO L158 Benchmark]: Boogie Preprocessor took 42.62ms. Allocated memory is still 142.6MB. Free memory was 98.6MB in the beginning and 95.4MB in the end (delta: 3.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2025-01-09 21:43:44,820 INFO L158 Benchmark]: RCFGBuilder took 371.20ms. Allocated memory is still 142.6MB. Free memory was 95.4MB in the beginning and 73.3MB in the end (delta: 22.1MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2025-01-09 21:43:44,821 INFO L158 Benchmark]: TraceAbstraction took 3014.18ms. Allocated memory is still 142.6MB. Free memory was 72.7MB in the beginning and 111.1MB in the end (delta: -38.4MB). Peak memory consumption was 35.8MB. Max. memory is 16.1GB. [2025-01-09 21:43:44,821 INFO L158 Benchmark]: Witness Printer took 85.22ms. Allocated memory is still 142.6MB. Free memory was 111.1MB in the beginning and 102.7MB in the end (delta: 8.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2025-01-09 21:43:44,822 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19ms. Allocated memory is still 201.3MB. Free memory is still 122.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 310.80ms. Allocated memory is still 142.6MB. Free memory was 112.0MB in the beginning and 99.6MB in the end (delta: 12.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 35.87ms. Allocated memory is still 142.6MB. Free memory was 99.6MB in the beginning and 98.6MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 42.62ms. Allocated memory is still 142.6MB. Free memory was 98.6MB in the beginning and 95.4MB in the end (delta: 3.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * RCFGBuilder took 371.20ms. Allocated memory is still 142.6MB. Free memory was 95.4MB in the beginning and 73.3MB in the end (delta: 22.1MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * TraceAbstraction took 3014.18ms. Allocated memory is still 142.6MB. Free memory was 72.7MB in the beginning and 111.1MB in the end (delta: -38.4MB). Peak memory consumption was 35.8MB. Max. memory is 16.1GB. * Witness Printer took 85.22ms. Allocated memory is still 142.6MB. Free memory was 111.1MB in the beginning and 102.7MB in the end (delta: 8.4MB). Peak memory consumption was 8.4MB. 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 - CounterExampleResult [Line: 14]: not all allocated memory was freed not all allocated memory was freed We found a FailurePath: [L102] CALL, EXPR nondet_tree() [L25] COND FALSE !(__VERIFIER_nondet_bool()) [L28] struct node *n = (struct node *)malloc(sizeof(struct node)); [L29] n->data = __VERIFIER_nondet_int() [L30] CALL, EXPR nondet_tree() [L25] COND TRUE __VERIFIER_nondet_bool() [L26] return 0; VAL [\result={0:0}] [L30] RET, EXPR nondet_tree() VAL [n={-1:0}] [L30] n->left = nondet_tree() [L31] CALL, EXPR nondet_tree() [L25] COND TRUE __VERIFIER_nondet_bool() [L26] return 0; VAL [\result={0:0}] [L31] RET, EXPR nondet_tree() VAL [n={-1:0}] [L31] n->right = nondet_tree() [L32] return n; VAL [\result={-1:0}] [L102] RET, EXPR nondet_tree() [L102] CALL task(nondet_tree()) [L78] CALL, EXPR min(t) VAL [\old(n)={-1:0}] [L37] COND FALSE !(!n) [L40] EXPR n->data [L40] int a = n->data; [L41] EXPR n->left VAL [\old(n)={-1:0}, a=2147483647, n={-1:0}] [L41] CALL, EXPR min(n->left) VAL [\old(n)={0:0}] [L37] COND TRUE !n [L38] return 2147483647; VAL [\old(n)={0:0}, \result=2147483647] [L41] RET, EXPR min(n->left) VAL [\old(n)={-1:0}, a=2147483647, n={-1:0}] [L41] int b = min(n->left); [L42] EXPR n->right VAL [\old(n)={-1:0}, a=2147483647, b=2147483647] [L42] CALL, EXPR min(n->right) VAL [\old(n)={0:0}] [L37] COND TRUE !n [L38] return 2147483647; VAL [\old(n)={0:0}, \result=2147483647] [L42] RET, EXPR min(n->right) VAL [\old(n)={-1:0}, a=2147483647, b=2147483647] [L42] int c = min(n->right); [L43] COND TRUE b <= a && b <= c [L43] return b; VAL [\old(n)={-1:0}, \result=2147483647] [L78] RET, EXPR min(t) VAL [t={-1:0}] [L78] int a = min(t); [L79] int b; VAL [a=2147483647, b={5:0}, t={-1:0}] [L81] CALL, EXPR size(t) VAL [\old(t)={-1:0}] [L73] COND FALSE !(!t) [L74] EXPR t->left VAL [\old(t)={-1:0}, t={-1:0}] [L74] CALL, EXPR size(t->left) VAL [\old(t)={0:0}] [L73] COND TRUE !t [L73] return 0; VAL [\old(t)={0:0}, \result=0] [L74] RET, EXPR size(t->left) VAL [\old(t)={-1:0}, t={-1:0}] [L74] EXPR t->right VAL [\old(t)={-1:0}] [L74] CALL, EXPR size(t->right) VAL [\old(t)={0:0}] [L73] COND TRUE !t [L73] return 0; VAL [\old(t)={0:0}, \result=0] [L74] RET, EXPR size(t->right) VAL [\old(t)={-1:0}] [L74] return size(t->left) + size(t->right) + 1; [L81] RET, EXPR size(t) VAL [a=2147483647, b={5:0}, t={-1:0}] [L81] int n = size(t); [L82] CALL assume_cycle_if_not(n != 0) [L9] COND FALSE !(!cond) [L82] RET assume_cycle_if_not(n != 0) [L83] EXPR, FCALL calloc(n, sizeof(int)) VAL [a=2147483647, b={5:0}, n=1, t={-1:0}] [L83] int *x = calloc(n, sizeof(int)); [L84] CALL tree_inorder(t, x, n) VAL [\old(a)={-2:0}, \old(i)=1, \old(t)={-1:0}] [L62] COND FALSE !(!t) [L65] EXPR t->left VAL [\old(a)={-2:0}, \old(i)=1, \old(t)={-1:0}, a={-2:0}, i=1, t={-1:0}] [L65] CALL, EXPR tree_inorder(t->left, a, i) VAL [\old(a)={-2:0}, \old(i)=1, \old(t)={0:0}] [L62] COND TRUE !t [L63] return i; VAL [\old(a)={-2:0}, \old(i)=1, \old(t)={0:0}, \result=1, a={-2:0}] [L65] RET, EXPR tree_inorder(t->left, a, i) VAL [\old(a)={-2:0}, \old(i)=1, \old(t)={-1:0}, a={-2:0}, i=1, t={-1:0}] [L65] i = tree_inorder(t->left, a, i) [L66] EXPR i++ [L66] EXPR t->data [L66] a[i++] = t->data [L67] EXPR t->right VAL [\old(a)={-2:0}, \old(i)=1, \old(t)={-1:0}, a={-2:0}, i=2] [L67] CALL, EXPR tree_inorder(t->right, a, i) VAL [\old(a)={-2:0}, \old(i)=2, \old(t)={0:0}] [L62] COND TRUE !t [L63] return i; VAL [\old(a)={-2:0}, \old(i)=2, \old(t)={0:0}, \result=2, a={-2:0}] [L67] RET, EXPR tree_inorder(t->right, a, i) VAL [\old(a)={-2:0}, \old(i)=1, \old(t)={-1:0}, a={-2:0}, i=2] [L67] i = tree_inorder(t->right, a, i) [L68] return i; VAL [\old(a)={-2:0}, \old(i)=1, \old(t)={-1:0}, \result=2, a={-2:0}, i=2] [L84] RET tree_inorder(t, x, n) VAL [a=2147483647, b={5:0}, n=1, t={-1:0}, x={-2:0}] [L85] EXPR x[0] [L85] CALL __VERIFIER_assert(a == x[0]) [L16] COND TRUE !cond [L16] CALL reach_error() [L14] __assert_fail("0", "tree_del_rec.c", 14, "reach_error") - UnprovableResult [Line: 101]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 8 procedures, 87 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 2.9s, OverallIterations: 5, TraceHistogramMax: 3, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 70 SdHoareTripleChecker+Valid, 0.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 53 mSDsluCounter, 2669 SdHoareTripleChecker+Invalid, 0.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 2267 mSDsCounter, 24 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 349 IncrementalHoareTripleChecker+Invalid, 373 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 24 mSolverCounterUnsat, 402 mSDtfsCounter, 349 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 278 GetRequests, 245 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=91occurred in iteration=4, InterpolantAutomatonStates: 33, 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, 4 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.5s InterpolantComputationTime, 430 NumberOfCodeBlocks, 430 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 459 ConstructedInterpolants, 0 QuantifiedInterpolants, 1142 SizeOfPredicates, 6 NumberOfNonLiveVariables, 634 ConjunctsInSsa, 50 ConjunctsInUnsatCore, 8 InterpolantComputations, 2 PerfectInterpolantSequences, 156/168 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, ConComCheckerStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2025-01-09 21:43:44,839 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(valid-memcleanup)