./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 8be7027f Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/verifythis/tree_del_rec.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-MemCleanup-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-memcleanup) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 448d6e9f7f0c094a8335d652a2766ae983308e33ec1a543ceaed97ae79744722 --- Real Ultimate output --- This is Ultimate 0.2.5-wip.dk.perfect-tracechecks-8be7027-m [2024-11-12 12:49:51,851 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-12 12:49:51,918 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-MemCleanup-32bit-Automizer_Default.epf [2024-11-12 12:49:51,942 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-12 12:49:51,943 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-12 12:49:51,965 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-12 12:49:51,966 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-12 12:49:51,967 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-12 12:49:51,967 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-12 12:49:51,969 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-12 12:49:51,969 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-12 12:49:51,970 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-12 12:49:51,970 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-12 12:49:51,972 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-12 12:49:51,972 INFO L153 SettingsManager]: * Use SBE=true [2024-11-12 12:49:51,973 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-12 12:49:51,973 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-12 12:49:51,973 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-12 12:49:51,974 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-12 12:49:51,974 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-12 12:49:51,976 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-12 12:49:51,977 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-12 12:49:51,977 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-12 12:49:51,977 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-12 12:49:51,978 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-12 12:49:51,978 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-12 12:49:51,978 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-12 12:49:51,978 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-12 12:49:51,978 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-12 12:49:51,979 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-12 12:49:51,979 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-12 12:49:51,979 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-12 12:49:51,979 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-12 12:49:51,979 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-12 12:49:51,980 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-12 12:49:51,980 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-12 12:49:51,981 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-12 12:49:51,981 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-12 12:49:51,981 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-12 12:49:51,981 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-12 12:49:51,982 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-12 12:49:51,989 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-12 12:49:51,989 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-12 12:49:51,989 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-12 12:49:51,990 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-12 12:49:51,990 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-memcleanup) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 448d6e9f7f0c094a8335d652a2766ae983308e33ec1a543ceaed97ae79744722 [2024-11-12 12:49:52,255 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-12 12:49:52,278 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-12 12:49:52,282 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-12 12:49:52,283 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-12 12:49:52,283 INFO L274 PluginConnector]: CDTParser initialized [2024-11-12 12:49:52,286 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/verifythis/tree_del_rec.c [2024-11-12 12:49:53,799 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-12 12:49:54,028 INFO L384 CDTParser]: Found 1 translation units. [2024-11-12 12:49:54,029 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/verifythis/tree_del_rec.c [2024-11-12 12:49:54,040 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/70d2b7012/f5a38fcedd4840e8ab0f8ff9cfb0b01d/FLAGa56e16ed4 [2024-11-12 12:49:54,383 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/70d2b7012/f5a38fcedd4840e8ab0f8ff9cfb0b01d [2024-11-12 12:49:54,386 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-12 12:49:54,387 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-12 12:49:54,388 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-12 12:49:54,388 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-12 12:49:54,393 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-12 12:49:54,394 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:49:54" (1/1) ... [2024-11-12 12:49:54,395 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@56db7322 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:49:54, skipping insertion in model container [2024-11-12 12:49:54,395 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:49:54" (1/1) ... [2024-11-12 12:49:54,421 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-12 12:49:54,605 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-12 12:49:54,618 WARN L1674 CHandler]: Possible shadowing of function min [2024-11-12 12:49:54,624 WARN L1674 CHandler]: Possible shadowing of function min [2024-11-12 12:49:54,644 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-12 12:49:54,662 INFO L200 MainTranslator]: Completed pre-run [2024-11-12 12:49:54,683 WARN L1674 CHandler]: Possible shadowing of function min [2024-11-12 12:49:54,688 WARN L1674 CHandler]: Possible shadowing of function min [2024-11-12 12:49:54,702 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-12 12:49:54,723 INFO L204 MainTranslator]: Completed translation [2024-11-12 12:49:54,724 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:49:54 WrapperNode [2024-11-12 12:49:54,724 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-12 12:49:54,725 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-12 12:49:54,725 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-12 12:49:54,726 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-12 12:49:54,732 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:49:54" (1/1) ... [2024-11-12 12:49:54,742 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:49:54" (1/1) ... [2024-11-12 12:49:54,763 INFO L138 Inliner]: procedures = 29, calls = 62, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 78 [2024-11-12 12:49:54,764 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-12 12:49:54,765 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-12 12:49:54,765 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-12 12:49:54,765 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-12 12:49:54,780 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:49:54" (1/1) ... [2024-11-12 12:49:54,780 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:49:54" (1/1) ... [2024-11-12 12:49:54,789 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:49:54" (1/1) ... [2024-11-12 12:49:54,812 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]. [2024-11-12 12:49:54,813 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:49:54" (1/1) ... [2024-11-12 12:49:54,813 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:49:54" (1/1) ... [2024-11-12 12:49:54,824 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:49:54" (1/1) ... [2024-11-12 12:49:54,831 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:49:54" (1/1) ... [2024-11-12 12:49:54,833 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:49:54" (1/1) ... [2024-11-12 12:49:54,835 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:49:54" (1/1) ... [2024-11-12 12:49:54,839 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-12 12:49:54,840 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-12 12:49:54,840 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-12 12:49:54,840 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-12 12:49:54,841 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:49:54" (1/1) ... [2024-11-12 12:49:54,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-12 12:49:54,868 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 12:49:54,886 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-12 12:49:54,895 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-12 12:49:54,948 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-12 12:49:54,949 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-12 12:49:54,949 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2024-11-12 12:49:54,949 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2024-11-12 12:49:54,949 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2024-11-12 12:49:54,950 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#3 [2024-11-12 12:49:54,950 INFO L130 BoogieDeclarations]: Found specification of procedure tree_del [2024-11-12 12:49:54,950 INFO L138 BoogieDeclarations]: Found implementation of procedure tree_del [2024-11-12 12:49:54,950 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-12 12:49:54,950 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-12 12:49:54,951 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-12 12:49:54,951 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-11-12 12:49:54,951 INFO L130 BoogieDeclarations]: Found specification of procedure min [2024-11-12 12:49:54,952 INFO L138 BoogieDeclarations]: Found implementation of procedure min [2024-11-12 12:49:54,952 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-12 12:49:54,953 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-12 12:49:54,953 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-12 12:49:54,954 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-11-12 12:49:54,954 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2024-11-12 12:49:54,954 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2024-11-12 12:49:54,955 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2024-11-12 12:49:54,955 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2024-11-12 12:49:54,956 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2024-11-12 12:49:54,956 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#3 [2024-11-12 12:49:54,956 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_tree [2024-11-12 12:49:54,956 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_tree [2024-11-12 12:49:54,956 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-12 12:49:54,956 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-12 12:49:54,956 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-12 12:49:54,957 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-11-12 12:49:54,957 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-12 12:49:54,957 INFO L130 BoogieDeclarations]: Found specification of procedure size [2024-11-12 12:49:54,957 INFO L138 BoogieDeclarations]: Found implementation of procedure size [2024-11-12 12:49:54,957 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-12 12:49:54,957 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-12 12:49:54,957 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-12 12:49:54,957 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-12 12:49:54,957 INFO L130 BoogieDeclarations]: Found specification of procedure tree_inorder [2024-11-12 12:49:54,958 INFO L138 BoogieDeclarations]: Found implementation of procedure tree_inorder [2024-11-12 12:49:54,958 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-12 12:49:55,108 INFO L238 CfgBuilder]: Building ICFG [2024-11-12 12:49:55,110 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-12 12:49:55,395 INFO L? ?]: Removed 61 outVars from TransFormulas that were not future-live. [2024-11-12 12:49:55,395 INFO L287 CfgBuilder]: Performing block encoding [2024-11-12 12:49:55,415 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-12 12:49:55,416 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-11-12 12:49:55,416 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:49:55 BoogieIcfgContainer [2024-11-12 12:49:55,416 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-12 12:49:55,418 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-12 12:49:55,418 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-12 12:49:55,421 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-12 12:49:55,422 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 12:49:54" (1/3) ... [2024-11-12 12:49:55,422 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1220981e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:49:55, skipping insertion in model container [2024-11-12 12:49:55,422 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:49:54" (2/3) ... [2024-11-12 12:49:55,423 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1220981e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:49:55, skipping insertion in model container [2024-11-12 12:49:55,423 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:49:55" (3/3) ... [2024-11-12 12:49:55,426 INFO L112 eAbstractionObserver]: Analyzing ICFG tree_del_rec.c [2024-11-12 12:49:55,443 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-12 12:49:55,443 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-11-12 12:49:55,482 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-12 12:49:55,488 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;@6f0ed4b9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-12 12:49:55,489 INFO L334 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-11-12 12:49:55,492 INFO L276 IsEmpty]: Start isEmpty. Operand has 88 states, 56 states have (on average 1.2678571428571428) internal successors, (71), 58 states have internal predecessors, (71), 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) [2024-11-12 12:49:55,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-11-12 12:49:55,501 INFO L210 NwaCegarLoop]: Found error trace [2024-11-12 12:49:55,502 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] [2024-11-12 12:49:55,502 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK] === [2024-11-12 12:49:55,507 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 12:49:55,507 INFO L85 PathProgramCache]: Analyzing trace with hash -294484957, now seen corresponding path program 1 times [2024-11-12 12:49:55,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 12:49:55,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644901744] [2024-11-12 12:49:55,515 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 12:49:55,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 12:49:55,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 12:49:56,102 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-12 12:49:56,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 12:49:56,114 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-11-12 12:49:56,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 12:49:56,126 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-11-12 12:49:56,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 12:49:56,168 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-11-12 12:49:56,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 12:49:56,191 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-11-12 12:49:56,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 12:49:56,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 12:49:56,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 12:49:56,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644901744] [2024-11-12 12:49:56,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644901744] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 12:49:56,202 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 12:49:56,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-12 12:49:56,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604592432] [2024-11-12 12:49:56,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 12:49:56,208 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-12 12:49:56,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 12:49:56,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-12 12:49:56,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-11-12 12:49:56,236 INFO L87 Difference]: Start difference. First operand has 88 states, 56 states have (on average 1.2678571428571428) internal successors, (71), 58 states have internal predecessors, (71), 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 8 states, 8 states have (on average 3.25) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-12 12:49:56,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-12 12:49:56,781 INFO L93 Difference]: Finished difference Result 96 states and 127 transitions. [2024-11-12 12:49:56,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-12 12:49:56,784 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (6), 5 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 [2024-11-12 12:49:56,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-12 12:49:56,796 INFO L225 Difference]: With dead ends: 96 [2024-11-12 12:49:56,797 INFO L226 Difference]: Without dead ends: 91 [2024-11-12 12:49:56,799 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-11-12 12:49:56,803 INFO L435 NwaCegarLoop]: 50 mSDtfsCounter, 116 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 342 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 432 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-12 12:49:56,804 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 192 Invalid, 432 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 342 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-12 12:49:56,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2024-11-12 12:49:56,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 86. [2024-11-12 12:49:56,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 54 states have (on average 1.1666666666666667) internal successors, (63), 56 states have internal predecessors, (63), 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) [2024-11-12 12:49:56,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 110 transitions. [2024-11-12 12:49:56,847 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 110 transitions. Word has length 37 [2024-11-12 12:49:56,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-12 12:49:56,848 INFO L471 AbstractCegarLoop]: Abstraction has 86 states and 110 transitions. [2024-11-12 12:49:56,848 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-12 12:49:56,848 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 110 transitions. [2024-11-12 12:49:56,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-11-12 12:49:56,850 INFO L210 NwaCegarLoop]: Found error trace [2024-11-12 12:49:56,851 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] [2024-11-12 12:49:56,851 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-12 12:49:56,851 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK] === [2024-11-12 12:49:56,852 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 12:49:56,852 INFO L85 PathProgramCache]: Analyzing trace with hash 934225092, now seen corresponding path program 1 times [2024-11-12 12:49:56,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 12:49:56,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613381014] [2024-11-12 12:49:56,852 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 12:49:56,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 12:49:56,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 12:49:57,094 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-12 12:49:57,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 12:49:57,153 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-11-12 12:49:57,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 12:49:57,161 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-11-12 12:49:57,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 12:49:57,270 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-12 12:49:57,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 12:49:57,277 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-11-12 12:49:57,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 12:49:57,292 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-11-12 12:49:57,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 12:49:57,312 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-11-12 12:49:57,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 12:49:57,319 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 12:49:57,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 12:49:57,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613381014] [2024-11-12 12:49:57,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613381014] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 12:49:57,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948541093] [2024-11-12 12:49:57,320 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 12:49:57,320 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 12:49:57,320 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 12:49:57,323 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 12:49:57,325 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-12 12:49:57,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 12:49:57,456 INFO L256 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-12 12:49:57,462 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 12:49:57,618 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 12:49:57,619 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 12:49:57,861 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 12:49:57,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1948541093] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 12:49:57,863 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 12:49:57,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 7] total 13 [2024-11-12 12:49:57,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420399815] [2024-11-12 12:49:57,864 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 12:49:57,866 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-12 12:49:57,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 12:49:57,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-12 12:49:57,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2024-11-12 12:49:57,867 INFO L87 Difference]: Start difference. First operand 86 states and 110 transitions. Second operand has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 9 states have internal predecessors, (44), 5 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2024-11-12 12:49:58,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-12 12:49:58,498 INFO L93 Difference]: Finished difference Result 95 states and 125 transitions. [2024-11-12 12:49:58,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-12 12:49:58,499 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 9 states have internal predecessors, (44), 5 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) Word has length 49 [2024-11-12 12:49:58,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-12 12:49:58,501 INFO L225 Difference]: With dead ends: 95 [2024-11-12 12:49:58,501 INFO L226 Difference]: Without dead ends: 91 [2024-11-12 12:49:58,502 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2024-11-12 12:49:58,503 INFO L435 NwaCegarLoop]: 46 mSDtfsCounter, 114 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 504 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 504 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-12 12:49:58,503 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 242 Invalid, 595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 504 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-12 12:49:58,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2024-11-12 12:49:58,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 88. [2024-11-12 12:49:58,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 55 states have (on average 1.1636363636363636) internal successors, (64), 58 states have internal predecessors, (64), 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) [2024-11-12 12:49:58,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 113 transitions. [2024-11-12 12:49:58,514 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 113 transitions. Word has length 49 [2024-11-12 12:49:58,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-12 12:49:58,514 INFO L471 AbstractCegarLoop]: Abstraction has 88 states and 113 transitions. [2024-11-12 12:49:58,514 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 9 states have internal predecessors, (44), 5 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2024-11-12 12:49:58,515 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 113 transitions. [2024-11-12 12:49:58,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2024-11-12 12:49:58,518 INFO L210 NwaCegarLoop]: Found error trace [2024-11-12 12:49:58,519 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] [2024-11-12 12:49:58,537 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-12 12:49:58,719 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 12:49:58,720 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK] === [2024-11-12 12:49:58,720 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 12:49:58,720 INFO L85 PathProgramCache]: Analyzing trace with hash 1318364877, now seen corresponding path program 1 times [2024-11-12 12:49:58,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 12:49:58,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300640252] [2024-11-12 12:49:58,721 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 12:49:58,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 12:49:58,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 12:49:58,872 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-12 12:49:58,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 12:49:58,963 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-12 12:49:58,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 12:49:58,968 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-11-12 12:49:58,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 12:49:58,973 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-11-12 12:49:58,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 12:49:59,002 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-11-12 12:49:59,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 12:49:59,009 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-12 12:49:59,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 12:49:59,012 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-11-12 12:49:59,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 12:49:59,026 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-11-12 12:49:59,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 12:49:59,044 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2024-11-12 12:49:59,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 12:49:59,050 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-12 12:49:59,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 12:49:59,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300640252] [2024-11-12 12:49:59,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300640252] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 12:49:59,051 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 12:49:59,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-11-12 12:49:59,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106108575] [2024-11-12 12:49:59,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 12:49:59,051 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-12 12:49:59,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 12:49:59,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-12 12:49:59,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2024-11-12 12:49:59,053 INFO L87 Difference]: Start difference. First operand 88 states and 113 transitions. Second operand has 11 states, 10 states have (on average 3.3) internal successors, (33), 7 states have internal predecessors, (33), 4 states have call successors, (10), 5 states have call predecessors, (10), 3 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2024-11-12 12:49:59,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-12 12:49:59,606 INFO L93 Difference]: Finished difference Result 93 states and 122 transitions. [2024-11-12 12:49:59,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-12 12:49:59,607 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.3) internal successors, (33), 7 states have internal predecessors, (33), 4 states have call successors, (10), 5 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 [2024-11-12 12:49:59,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-12 12:49:59,609 INFO L225 Difference]: With dead ends: 93 [2024-11-12 12:49:59,609 INFO L226 Difference]: Without dead ends: 93 [2024-11-12 12:49:59,609 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2024-11-12 12:49:59,610 INFO L435 NwaCegarLoop]: 47 mSDtfsCounter, 94 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 570 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 632 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 570 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-12 12:49:59,612 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 281 Invalid, 632 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 570 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-12 12:49:59,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2024-11-12 12:49:59,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 90. [2024-11-12 12:49:59,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 56 states have (on average 1.1607142857142858) internal successors, (65), 60 states have internal predecessors, (65), 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) [2024-11-12 12:49:59,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 116 transitions. [2024-11-12 12:49:59,627 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 116 transitions. Word has length 61 [2024-11-12 12:49:59,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-12 12:49:59,627 INFO L471 AbstractCegarLoop]: Abstraction has 90 states and 116 transitions. [2024-11-12 12:49:59,627 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.3) internal successors, (33), 7 states have internal predecessors, (33), 4 states have call successors, (10), 5 states have call predecessors, (10), 3 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2024-11-12 12:49:59,628 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 116 transitions. [2024-11-12 12:49:59,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2024-11-12 12:49:59,630 INFO L210 NwaCegarLoop]: Found error trace [2024-11-12 12:49:59,630 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] [2024-11-12 12:49:59,630 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-12 12:49:59,630 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK] === [2024-11-12 12:49:59,631 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 12:49:59,631 INFO L85 PathProgramCache]: Analyzing trace with hash -390077679, now seen corresponding path program 1 times [2024-11-12 12:49:59,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 12:49:59,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160350432] [2024-11-12 12:49:59,632 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 12:49:59,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 12:49:59,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 12:49:59,873 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-12 12:49:59,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 12:49:59,917 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-12 12:49:59,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 12:49:59,922 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-11-12 12:49:59,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 12:49:59,927 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-11-12 12:49:59,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 12:50:00,052 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-12 12:50:00,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 12:50:00,063 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-11-12 12:50:00,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 12:50:00,068 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-11-12 12:50:00,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 12:50:00,076 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-12 12:50:00,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 12:50:00,080 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-11-12 12:50:00,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 12:50:00,096 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2024-11-12 12:50:00,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 12:50:00,115 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2024-11-12 12:50:00,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 12:50:00,149 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-11-12 12:50:00,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 12:50:00,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160350432] [2024-11-12 12:50:00,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160350432] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 12:50:00,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287808110] [2024-11-12 12:50:00,150 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 12:50:00,150 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 12:50:00,150 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 12:50:00,154 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 12:50:00,156 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-12 12:50:00,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 12:50:00,301 INFO L256 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-12 12:50:00,309 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 12:50:00,436 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-11-12 12:50:00,437 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 12:50:00,664 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-11-12 12:50:00,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1287808110] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 12:50:00,665 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 12:50:00,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 19 [2024-11-12 12:50:00,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187734565] [2024-11-12 12:50:00,665 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 12:50:00,666 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-12 12:50:00,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 12:50:00,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-12 12:50:00,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2024-11-12 12:50:00,667 INFO L87 Difference]: Start difference. First operand 90 states and 116 transitions. Second operand has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 15 states have internal predecessors, (56), 8 states have call successors, (22), 5 states have call predecessors, (22), 5 states have return successors, (17), 9 states have call predecessors, (17), 7 states have call successors, (17) [2024-11-12 12:50:01,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-12 12:50:01,733 INFO L93 Difference]: Finished difference Result 95 states and 121 transitions. [2024-11-12 12:50:01,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-12 12:50:01,733 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 15 states have internal predecessors, (56), 8 states have call successors, (22), 5 states have call predecessors, (22), 5 states have return successors, (17), 9 states have call predecessors, (17), 7 states have call successors, (17) Word has length 74 [2024-11-12 12:50:01,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-12 12:50:01,735 INFO L225 Difference]: With dead ends: 95 [2024-11-12 12:50:01,735 INFO L226 Difference]: Without dead ends: 95 [2024-11-12 12:50:01,736 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=142, Invalid=914, Unknown=0, NotChecked=0, Total=1056 [2024-11-12 12:50:01,737 INFO L435 NwaCegarLoop]: 44 mSDtfsCounter, 114 mSDsluCounter, 443 mSDsCounter, 0 mSdLazyCounter, 1095 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 487 SdHoareTripleChecker+Invalid, 1179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 1095 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-12 12:50:01,737 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 487 Invalid, 1179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 1095 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-12 12:50:01,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2024-11-12 12:50:01,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 94. [2024-11-12 12:50:01,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 59 states have (on average 1.152542372881356) internal successors, (68), 63 states have internal predecessors, (68), 22 states have call successors, (22), 8 states have call predecessors, (22), 11 states have return successors, (30), 22 states have call predecessors, (30), 22 states have call successors, (30) [2024-11-12 12:50:01,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 120 transitions. [2024-11-12 12:50:01,748 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 120 transitions. Word has length 74 [2024-11-12 12:50:01,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-12 12:50:01,749 INFO L471 AbstractCegarLoop]: Abstraction has 94 states and 120 transitions. [2024-11-12 12:50:01,749 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 15 states have internal predecessors, (56), 8 states have call successors, (22), 5 states have call predecessors, (22), 5 states have return successors, (17), 9 states have call predecessors, (17), 7 states have call successors, (17) [2024-11-12 12:50:01,749 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 120 transitions. [2024-11-12 12:50:01,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2024-11-12 12:50:01,750 INFO L210 NwaCegarLoop]: Found error trace [2024-11-12 12:50:01,751 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] [2024-11-12 12:50:01,766 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-12 12:50:01,951 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2024-11-12 12:50:01,951 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK] === [2024-11-12 12:50:01,952 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 12:50:01,952 INFO L85 PathProgramCache]: Analyzing trace with hash -12590684, now seen corresponding path program 1 times [2024-11-12 12:50:01,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 12:50:01,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21472293] [2024-11-12 12:50:01,952 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 12:50:01,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 12:50:01,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-12 12:50:01,988 INFO L357 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-12 12:50:02,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-12 12:50:02,043 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-12 12:50:02,043 INFO L339 BasicCegarLoop]: Counterexample is feasible [2024-11-12 12:50:02,044 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK (1 of 2 remaining) [2024-11-12 12:50:02,046 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK (0 of 2 remaining) [2024-11-12 12:50:02,046 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-12 12:50:02,049 INFO L421 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2024-11-12 12:50:02,098 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2024-11-12 12:50:02,104 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.11 12:50:02 BoogieIcfgContainer [2024-11-12 12:50:02,104 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-11-12 12:50:02,105 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-11-12 12:50:02,105 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-11-12 12:50:02,105 INFO L274 PluginConnector]: Witness Printer initialized [2024-11-12 12:50:02,106 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:49:55" (3/4) ... [2024-11-12 12:50:02,106 INFO L136 WitnessPrinter]: Generating witness for reachability counterexample [2024-11-12 12:50:02,153 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2024-11-12 12:50:02,154 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-11-12 12:50:02,154 INFO L158 Benchmark]: Toolchain (without parser) took 7767.36ms. Allocated memory was 167.8MB in the beginning and 230.7MB in the end (delta: 62.9MB). Free memory was 111.8MB in the beginning and 117.8MB in the end (delta: -6.0MB). Peak memory consumption was 59.2MB. Max. memory is 16.1GB. [2024-11-12 12:50:02,154 INFO L158 Benchmark]: CDTParser took 0.22ms. Allocated memory is still 167.8MB. Free memory is still 135.1MB. There was no memory consumed. Max. memory is 16.1GB. [2024-11-12 12:50:02,154 INFO L158 Benchmark]: CACSL2BoogieTranslator took 336.63ms. Allocated memory is still 167.8MB. Free memory was 111.8MB in the beginning and 97.6MB in the end (delta: 14.2MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2024-11-12 12:50:02,155 INFO L158 Benchmark]: Boogie Procedure Inliner took 38.96ms. Allocated memory is still 167.8MB. Free memory was 97.6MB in the beginning and 95.9MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-11-12 12:50:02,155 INFO L158 Benchmark]: Boogie Preprocessor took 74.66ms. Allocated memory is still 167.8MB. Free memory was 95.9MB in the beginning and 92.2MB in the end (delta: 3.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-11-12 12:50:02,155 INFO L158 Benchmark]: RCFGBuilder took 576.15ms. Allocated memory is still 167.8MB. Free memory was 92.2MB in the beginning and 67.8MB in the end (delta: 24.4MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. [2024-11-12 12:50:02,155 INFO L158 Benchmark]: TraceAbstraction took 6686.23ms. Allocated memory was 167.8MB in the beginning and 230.7MB in the end (delta: 62.9MB). Free memory was 67.0MB in the beginning and 122.0MB in the end (delta: -54.9MB). Peak memory consumption was 11.0MB. Max. memory is 16.1GB. [2024-11-12 12:50:02,156 INFO L158 Benchmark]: Witness Printer took 48.83ms. Allocated memory is still 230.7MB. Free memory was 120.9MB in the beginning and 117.8MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2024-11-12 12:50:02,157 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22ms. Allocated memory is still 167.8MB. Free memory is still 135.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 336.63ms. Allocated memory is still 167.8MB. Free memory was 111.8MB in the beginning and 97.6MB in the end (delta: 14.2MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 38.96ms. Allocated memory is still 167.8MB. Free memory was 97.6MB in the beginning and 95.9MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 74.66ms. Allocated memory is still 167.8MB. Free memory was 95.9MB in the beginning and 92.2MB in the end (delta: 3.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 576.15ms. Allocated memory is still 167.8MB. Free memory was 92.2MB in the beginning and 67.8MB in the end (delta: 24.4MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. * TraceAbstraction took 6686.23ms. Allocated memory was 167.8MB in the beginning and 230.7MB in the end (delta: 62.9MB). Free memory was 67.0MB in the beginning and 122.0MB in the end (delta: -54.9MB). Peak memory consumption was 11.0MB. Max. memory is 16.1GB. * Witness Printer took 48.83ms. Allocated memory is still 230.7MB. Free memory was 120.9MB in the beginning and 117.8MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. 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, 88 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 6.6s, OverallIterations: 5, TraceHistogramMax: 3, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 2.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 468 SdHoareTripleChecker+Valid, 2.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 438 mSDsluCounter, 1202 SdHoareTripleChecker+Invalid, 1.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1015 mSDsCounter, 327 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2511 IncrementalHoareTripleChecker+Invalid, 2838 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 327 mSolverCounterUnsat, 187 mSDtfsCounter, 2511 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 370 GetRequests, 301 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 1.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=94occurred in iteration=4, InterpolantAutomatonStates: 50, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 4 MinimizatonAttempts, 12 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 2.5s InterpolantComputationTime, 430 NumberOfCodeBlocks, 430 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 459 ConstructedInterpolants, 0 QuantifiedInterpolants, 1296 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 RESULT: Ultimate proved your program to be incorrect! [2024-11-12 12:50:02,185 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/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)