./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 d790fecc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2836042-e3cd-4b1e-8120-86d03eb1d59c/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2836042-e3cd-4b1e-8120-86d03eb1d59c/bin/uautomizer-verify-aQ6SnzHsRB/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2836042-e3cd-4b1e-8120-86d03eb1d59c/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2836042-e3cd-4b1e-8120-86d03eb1d59c/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/verifythis/tree_del_rec.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2836042-e3cd-4b1e-8120-86d03eb1d59c/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-MemCleanup-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2836042-e3cd-4b1e-8120-86d03eb1d59c/bin/uautomizer-verify-aQ6SnzHsRB --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-dev-d790fec [2024-11-28 04:31:42,666 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-28 04:31:42,739 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2836042-e3cd-4b1e-8120-86d03eb1d59c/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-MemCleanup-32bit-Automizer_Default.epf [2024-11-28 04:31:42,745 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-28 04:31:42,745 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-28 04:31:42,771 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-28 04:31:42,772 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-28 04:31:42,772 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-28 04:31:42,773 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-28 04:31:42,773 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-28 04:31:42,773 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-28 04:31:42,773 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-28 04:31:42,773 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-28 04:31:42,774 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-28 04:31:42,774 INFO L153 SettingsManager]: * Use SBE=true [2024-11-28 04:31:42,774 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-28 04:31:42,774 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-28 04:31:42,774 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-28 04:31:42,774 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-28 04:31:42,774 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-28 04:31:42,774 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-28 04:31:42,774 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-28 04:31:42,775 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-28 04:31:42,775 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-28 04:31:42,775 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-28 04:31:42,775 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-28 04:31:42,775 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-28 04:31:42,775 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-28 04:31:42,775 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-28 04:31:42,775 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-28 04:31:42,775 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-28 04:31:42,776 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-28 04:31:42,776 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-28 04:31:42,776 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 04:31:42,776 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 04:31:42,776 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 04:31:42,776 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 04:31:42,776 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-28 04:31:42,777 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 04:31:42,777 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 04:31:42,777 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 04:31:42,777 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 04:31:42,777 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-28 04:31:42,777 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-28 04:31:42,777 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-28 04:31:42,777 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-28 04:31:42,778 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-28 04:31:42,778 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-28 04:31:42,778 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-28 04:31:42,778 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-28 04:31:42,778 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 -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2836042-e3cd-4b1e-8120-86d03eb1d59c/bin/uautomizer-verify-aQ6SnzHsRB 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 [2024-11-28 04:31:43,128 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-28 04:31:43,139 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-28 04:31:43,143 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-28 04:31:43,144 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-28 04:31:43,144 INFO L274 PluginConnector]: CDTParser initialized [2024-11-28 04:31:43,147 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2836042-e3cd-4b1e-8120-86d03eb1d59c/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/verifythis/tree_del_rec.c [2024-11-28 04:31:46,347 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2836042-e3cd-4b1e-8120-86d03eb1d59c/bin/uautomizer-verify-aQ6SnzHsRB/data/7710465cc/b7377cc2bac345e1902dbb3d0993e126/FLAG96a1df958 [2024-11-28 04:31:46,677 INFO L384 CDTParser]: Found 1 translation units. [2024-11-28 04:31:46,679 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2836042-e3cd-4b1e-8120-86d03eb1d59c/sv-benchmarks/c/verifythis/tree_del_rec.c [2024-11-28 04:31:46,692 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2836042-e3cd-4b1e-8120-86d03eb1d59c/bin/uautomizer-verify-aQ6SnzHsRB/data/7710465cc/b7377cc2bac345e1902dbb3d0993e126/FLAG96a1df958 [2024-11-28 04:31:46,733 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2836042-e3cd-4b1e-8120-86d03eb1d59c/bin/uautomizer-verify-aQ6SnzHsRB/data/7710465cc/b7377cc2bac345e1902dbb3d0993e126 [2024-11-28 04:31:46,736 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-28 04:31:46,737 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-28 04:31:46,739 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-28 04:31:46,739 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-28 04:31:46,743 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-28 04:31:46,744 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 04:31:46" (1/1) ... [2024-11-28 04:31:46,745 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@89ca38e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:31:46, skipping insertion in model container [2024-11-28 04:31:46,745 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 04:31:46" (1/1) ... [2024-11-28 04:31:46,762 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-28 04:31:46,950 WARN L1063 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-28 04:31:46,963 WARN L1675 CHandler]: Possible shadowing of function min [2024-11-28 04:31:46,965 WARN L1675 CHandler]: Possible shadowing of function min [2024-11-28 04:31:46,997 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 04:31:47,018 INFO L200 MainTranslator]: Completed pre-run [2024-11-28 04:31:47,048 WARN L1675 CHandler]: Possible shadowing of function min [2024-11-28 04:31:47,051 WARN L1675 CHandler]: Possible shadowing of function min [2024-11-28 04:31:47,073 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 04:31:47,096 INFO L204 MainTranslator]: Completed translation [2024-11-28 04:31:47,097 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:31:47 WrapperNode [2024-11-28 04:31:47,097 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-28 04:31:47,098 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-28 04:31:47,098 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-28 04:31:47,098 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-28 04:31:47,111 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:31:47" (1/1) ... [2024-11-28 04:31:47,123 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:31:47" (1/1) ... [2024-11-28 04:31:47,151 INFO L138 Inliner]: procedures = 29, calls = 62, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 76 [2024-11-28 04:31:47,152 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-28 04:31:47,152 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-28 04:31:47,152 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-28 04:31:47,152 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-28 04:31:47,165 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:31:47" (1/1) ... [2024-11-28 04:31:47,166 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:31:47" (1/1) ... [2024-11-28 04:31:47,173 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:31:47" (1/1) ... [2024-11-28 04:31:47,218 INFO L175 MemorySlicer]: Split 25 memory accesses to 4 slices as follows [2, 2, 16, 5]. 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, 4, 2]. [2024-11-28 04:31:47,218 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:31:47" (1/1) ... [2024-11-28 04:31:47,218 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:31:47" (1/1) ... [2024-11-28 04:31:47,231 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:31:47" (1/1) ... [2024-11-28 04:31:47,232 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:31:47" (1/1) ... [2024-11-28 04:31:47,235 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:31:47" (1/1) ... [2024-11-28 04:31:47,238 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:31:47" (1/1) ... [2024-11-28 04:31:47,239 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:31:47" (1/1) ... [2024-11-28 04:31:47,243 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-28 04:31:47,244 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-28 04:31:47,244 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-28 04:31:47,244 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-28 04:31:47,245 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:31:47" (1/1) ... [2024-11-28 04:31:47,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 04:31:47,270 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2836042-e3cd-4b1e-8120-86d03eb1d59c/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:31:47,287 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2836042-e3cd-4b1e-8120-86d03eb1d59c/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-28 04:31:47,293 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2836042-e3cd-4b1e-8120-86d03eb1d59c/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-28 04:31:47,323 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-28 04:31:47,324 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-28 04:31:47,324 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2024-11-28 04:31:47,324 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2024-11-28 04:31:47,324 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2024-11-28 04:31:47,324 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#3 [2024-11-28 04:31:47,324 INFO L130 BoogieDeclarations]: Found specification of procedure tree_del [2024-11-28 04:31:47,324 INFO L138 BoogieDeclarations]: Found implementation of procedure tree_del [2024-11-28 04:31:47,324 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-28 04:31:47,324 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-28 04:31:47,324 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-28 04:31:47,325 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-11-28 04:31:47,325 INFO L130 BoogieDeclarations]: Found specification of procedure min [2024-11-28 04:31:47,325 INFO L138 BoogieDeclarations]: Found implementation of procedure min [2024-11-28 04:31:47,325 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-28 04:31:47,325 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-28 04:31:47,325 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-28 04:31:47,325 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-11-28 04:31:47,325 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2024-11-28 04:31:47,325 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2024-11-28 04:31:47,325 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2024-11-28 04:31:47,325 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2024-11-28 04:31:47,326 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2024-11-28 04:31:47,326 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#3 [2024-11-28 04:31:47,326 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_tree [2024-11-28 04:31:47,326 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_tree [2024-11-28 04:31:47,326 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-28 04:31:47,326 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-28 04:31:47,326 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-28 04:31:47,326 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-11-28 04:31:47,326 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-28 04:31:47,326 INFO L130 BoogieDeclarations]: Found specification of procedure size [2024-11-28 04:31:47,326 INFO L138 BoogieDeclarations]: Found implementation of procedure size [2024-11-28 04:31:47,326 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-28 04:31:47,326 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-28 04:31:47,326 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-28 04:31:47,326 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-28 04:31:47,327 INFO L130 BoogieDeclarations]: Found specification of procedure tree_inorder [2024-11-28 04:31:47,327 INFO L138 BoogieDeclarations]: Found implementation of procedure tree_inorder [2024-11-28 04:31:47,327 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-28 04:31:47,536 INFO L234 CfgBuilder]: Building ICFG [2024-11-28 04:31:47,539 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-28 04:31:47,900 INFO L? ?]: Removed 61 outVars from TransFormulas that were not future-live. [2024-11-28 04:31:47,901 INFO L283 CfgBuilder]: Performing block encoding [2024-11-28 04:31:47,912 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-28 04:31:47,913 INFO L312 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-28 04:31:47,913 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 04:31:47 BoogieIcfgContainer [2024-11-28 04:31:47,913 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-28 04:31:47,916 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-28 04:31:47,916 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-28 04:31:47,921 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-28 04:31:47,921 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 04:31:46" (1/3) ... [2024-11-28 04:31:47,922 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ccc99ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 04:31:47, skipping insertion in model container [2024-11-28 04:31:47,922 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:31:47" (2/3) ... [2024-11-28 04:31:47,922 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ccc99ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 04:31:47, skipping insertion in model container [2024-11-28 04:31:47,922 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 04:31:47" (3/3) ... [2024-11-28 04:31:47,924 INFO L128 eAbstractionObserver]: Analyzing ICFG tree_del_rec.c [2024-11-28 04:31:47,939 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-28 04:31:47,941 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG tree_del_rec.c that has 8 procedures, 89 locations, 1 initial locations, 2 loop locations, and 2 error locations. [2024-11-28 04:31:47,983 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-28 04:31:47,997 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;@2a6536bf, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-28 04:31:47,997 INFO L334 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-11-28 04:31:48,003 INFO L276 IsEmpty]: Start isEmpty. Operand has 89 states, 57 states have (on average 1.263157894736842) internal successors, (72), 59 states have internal predecessors, (72), 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) [2024-11-28 04:31:48,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-11-28 04:31:48,014 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:31:48,016 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] [2024-11-28 04:31:48,017 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK] === [2024-11-28 04:31:48,023 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:31:48,024 INFO L85 PathProgramCache]: Analyzing trace with hash -252093626, now seen corresponding path program 1 times [2024-11-28 04:31:48,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:31:48,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258766241] [2024-11-28 04:31:48,035 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:31:48,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:31:48,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:31:48,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:31:48,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:31:48,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258766241] [2024-11-28 04:31:48,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258766241] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:31:48,622 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:31:48,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 04:31:48,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253146072] [2024-11-28 04:31:48,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:31:48,628 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 04:31:48,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:31:48,676 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 04:31:48,677 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-28 04:31:48,680 INFO L87 Difference]: Start difference. First operand has 89 states, 57 states have (on average 1.263157894736842) internal successors, (72), 59 states have internal predecessors, (72), 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) [2024-11-28 04:31:48,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:31:48,746 INFO L93 Difference]: Finished difference Result 92 states and 118 transitions. [2024-11-28 04:31:48,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 04:31:48,748 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 [2024-11-28 04:31:48,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:31:48,759 INFO L225 Difference]: With dead ends: 92 [2024-11-28 04:31:48,760 INFO L226 Difference]: Without dead ends: 87 [2024-11-28 04:31:48,762 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 [2024-11-28 04:31:48,766 INFO L435 NwaCegarLoop]: 109 mSDtfsCounter, 0 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 427 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 [2024-11-28 04:31:48,767 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 427 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-28 04:31:48,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2024-11-28 04:31:48,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2024-11-28 04:31:48,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 55 states have (on average 1.1636363636363636) internal successors, (64), 57 states have internal predecessors, (64), 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) [2024-11-28 04:31:48,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 111 transitions. [2024-11-28 04:31:48,826 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 111 transitions. Word has length 37 [2024-11-28 04:31:48,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:31:48,826 INFO L471 AbstractCegarLoop]: Abstraction has 87 states and 111 transitions. [2024-11-28 04:31:48,827 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) [2024-11-28 04:31:48,827 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 111 transitions. [2024-11-28 04:31:48,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-11-28 04:31:48,833 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:31:48,833 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] [2024-11-28 04:31:48,833 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-28 04:31:48,833 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK] === [2024-11-28 04:31:48,834 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:31:48,834 INFO L85 PathProgramCache]: Analyzing trace with hash 704598371, now seen corresponding path program 1 times [2024-11-28 04:31:48,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:31:48,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50514909] [2024-11-28 04:31:48,834 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:31:48,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:31:48,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:31:49,322 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 04:31:49,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:31:49,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50514909] [2024-11-28 04:31:49,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50514909] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:31:49,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557861186] [2024-11-28 04:31:49,323 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:31:49,323 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:31:49,324 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2836042-e3cd-4b1e-8120-86d03eb1d59c/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:31:49,330 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2836042-e3cd-4b1e-8120-86d03eb1d59c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:31:49,333 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2836042-e3cd-4b1e-8120-86d03eb1d59c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-28 04:31:49,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:31:49,493 INFO L256 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-28 04:31:49,499 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:31:49,680 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 04:31:49,680 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:31:50,009 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 04:31:50,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [557861186] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:31:50,010 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:31:50,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 10 [2024-11-28 04:31:50,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357369389] [2024-11-28 04:31:50,011 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:31:50,011 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-28 04:31:50,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:31:50,015 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-28 04:31:50,015 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-11-28 04:31:50,016 INFO L87 Difference]: Start difference. First operand 87 states and 111 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) [2024-11-28 04:31:50,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:31:50,187 INFO L93 Difference]: Finished difference Result 93 states and 120 transitions. [2024-11-28 04:31:50,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-28 04:31:50,190 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 [2024-11-28 04:31:50,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:31:50,192 INFO L225 Difference]: With dead ends: 93 [2024-11-28 04:31:50,192 INFO L226 Difference]: Without dead ends: 89 [2024-11-28 04:31:50,192 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 [2024-11-28 04:31:50,193 INFO L435 NwaCegarLoop]: 103 mSDtfsCounter, 2 mSDsluCounter, 678 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 781 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 04:31:50,193 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 781 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 04:31:50,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2024-11-28 04:31:50,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2024-11-28 04:31:50,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 56 states have (on average 1.1607142857142858) internal successors, (65), 59 states have internal predecessors, (65), 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) [2024-11-28 04:31:50,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 114 transitions. [2024-11-28 04:31:50,213 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 114 transitions. Word has length 49 [2024-11-28 04:31:50,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:31:50,213 INFO L471 AbstractCegarLoop]: Abstraction has 89 states and 114 transitions. [2024-11-28 04:31:50,213 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) [2024-11-28 04:31:50,213 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 114 transitions. [2024-11-28 04:31:50,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2024-11-28 04:31:50,217 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:31:50,217 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] [2024-11-28 04:31:50,229 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2836042-e3cd-4b1e-8120-86d03eb1d59c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-28 04:31:50,418 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2836042-e3cd-4b1e-8120-86d03eb1d59c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:31:50,418 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK] === [2024-11-28 04:31:50,418 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:31:50,419 INFO L85 PathProgramCache]: Analyzing trace with hash -1236231448, now seen corresponding path program 1 times [2024-11-28 04:31:50,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:31:50,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097273450] [2024-11-28 04:31:50,419 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:31:50,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:31:50,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:31:50,734 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-28 04:31:50,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:31:50,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097273450] [2024-11-28 04:31:50,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097273450] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:31:50,734 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:31:50,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-28 04:31:50,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469040363] [2024-11-28 04:31:50,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:31:50,735 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-28 04:31:50,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:31:50,735 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-28 04:31:50,736 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-11-28 04:31:50,736 INFO L87 Difference]: Start difference. First operand 89 states and 114 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) [2024-11-28 04:31:50,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:31:50,843 INFO L93 Difference]: Finished difference Result 91 states and 117 transitions. [2024-11-28 04:31:50,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-28 04:31:50,844 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 [2024-11-28 04:31:50,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:31:50,846 INFO L225 Difference]: With dead ends: 91 [2024-11-28 04:31:50,846 INFO L226 Difference]: Without dead ends: 91 [2024-11-28 04:31:50,846 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 [2024-11-28 04:31:50,847 INFO L435 NwaCegarLoop]: 102 mSDtfsCounter, 19 mSDsluCounter, 559 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 661 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 04:31:50,847 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 661 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 04:31:50,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2024-11-28 04:31:50,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2024-11-28 04:31:50,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 57 states have (on average 1.1578947368421053) internal successors, (66), 61 states have internal predecessors, (66), 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) [2024-11-28 04:31:50,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 117 transitions. [2024-11-28 04:31:50,870 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 117 transitions. Word has length 61 [2024-11-28 04:31:50,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:31:50,871 INFO L471 AbstractCegarLoop]: Abstraction has 91 states and 117 transitions. [2024-11-28 04:31:50,871 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) [2024-11-28 04:31:50,871 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 117 transitions. [2024-11-28 04:31:50,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2024-11-28 04:31:50,873 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:31:50,873 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] [2024-11-28 04:31:50,873 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-28 04:31:50,874 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK] === [2024-11-28 04:31:50,876 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:31:50,877 INFO L85 PathProgramCache]: Analyzing trace with hash -1259511790, now seen corresponding path program 1 times [2024-11-28 04:31:50,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:31:50,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134948994] [2024-11-28 04:31:50,877 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:31:50,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:31:50,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:31:51,454 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-11-28 04:31:51,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:31:51,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134948994] [2024-11-28 04:31:51,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134948994] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:31:51,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495713611] [2024-11-28 04:31:51,455 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:31:51,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:31:51,455 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2836042-e3cd-4b1e-8120-86d03eb1d59c/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:31:51,457 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2836042-e3cd-4b1e-8120-86d03eb1d59c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:31:51,459 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2836042-e3cd-4b1e-8120-86d03eb1d59c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-28 04:31:51,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:31:51,641 INFO L256 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-28 04:31:51,646 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:31:51,815 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-11-28 04:31:51,815 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:31:52,167 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-11-28 04:31:52,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1495713611] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:31:52,168 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:31:52,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 16 [2024-11-28 04:31:52,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050409321] [2024-11-28 04:31:52,168 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:31:52,169 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-28 04:31:52,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:31:52,170 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-28 04:31:52,170 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2024-11-28 04:31:52,170 INFO L87 Difference]: Start difference. First operand 91 states and 117 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 8 states have call successors, (17), 2 states have call predecessors, (17), 5 states have return successors, (17), 9 states have call predecessors, (17), 7 states have call successors, (17) [2024-11-28 04:31:52,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:31:52,629 INFO L93 Difference]: Finished difference Result 95 states and 121 transitions. [2024-11-28 04:31:52,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-28 04:31:52,630 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 8 states have call successors, (17), 2 states have call predecessors, (17), 5 states have return successors, (17), 9 states have call predecessors, (17), 7 states have call successors, (17) Word has length 74 [2024-11-28 04:31:52,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:31:52,632 INFO L225 Difference]: With dead ends: 95 [2024-11-28 04:31:52,632 INFO L226 Difference]: Without dead ends: 95 [2024-11-28 04:31:52,637 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2024-11-28 04:31:52,638 INFO L435 NwaCegarLoop]: 91 mSDtfsCounter, 39 mSDsluCounter, 931 mSDsCounter, 0 mSdLazyCounter, 335 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 1022 SdHoareTripleChecker+Invalid, 364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-28 04:31:52,638 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 1022 Invalid, 364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 335 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-28 04:31:52,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2024-11-28 04:31:52,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2024-11-28 04:31:52,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 60 states have (on average 1.15) internal successors, (69), 64 states have internal predecessors, (69), 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) [2024-11-28 04:31:52,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 121 transitions. [2024-11-28 04:31:52,652 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 121 transitions. Word has length 74 [2024-11-28 04:31:52,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:31:52,653 INFO L471 AbstractCegarLoop]: Abstraction has 95 states and 121 transitions. [2024-11-28 04:31:52,653 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 8 states have call successors, (17), 2 states have call predecessors, (17), 5 states have return successors, (17), 9 states have call predecessors, (17), 7 states have call successors, (17) [2024-11-28 04:31:52,653 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 121 transitions. [2024-11-28 04:31:52,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2024-11-28 04:31:52,659 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:31:52,659 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] [2024-11-28 04:31:52,674 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2836042-e3cd-4b1e-8120-86d03eb1d59c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-28 04:31:52,859 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2836042-e3cd-4b1e-8120-86d03eb1d59c/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:31:52,860 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK] === [2024-11-28 04:31:52,860 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:31:52,860 INFO L85 PathProgramCache]: Analyzing trace with hash 1032026853, now seen corresponding path program 1 times [2024-11-28 04:31:52,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:31:52,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609194837] [2024-11-28 04:31:52,861 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:31:52,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:31:52,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-28 04:31:52,955 INFO L357 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-28 04:31:53,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-28 04:31:53,060 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-28 04:31:53,060 INFO L340 BasicCegarLoop]: Counterexample is feasible [2024-11-28 04:31:53,061 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK (1 of 2 remaining) [2024-11-28 04:31:53,063 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK (0 of 2 remaining) [2024-11-28 04:31:53,063 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-28 04:31:53,068 INFO L422 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2024-11-28 04:31:53,140 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2024-11-28 04:31:53,144 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 04:31:53 BoogieIcfgContainer [2024-11-28 04:31:53,144 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-11-28 04:31:53,144 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-11-28 04:31:53,145 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-11-28 04:31:53,145 INFO L274 PluginConnector]: Witness Printer initialized [2024-11-28 04:31:53,147 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 04:31:47" (3/4) ... [2024-11-28 04:31:53,148 INFO L140 WitnessPrinter]: Generating witness for reachability counterexample [2024-11-28 04:31:53,239 INFO L129 tionWitnessGenerator]: Generated YAML witness of length 45. [2024-11-28 04:31:53,325 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2836042-e3cd-4b1e-8120-86d03eb1d59c/bin/uautomizer-verify-aQ6SnzHsRB/witness.graphml [2024-11-28 04:31:53,326 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2836042-e3cd-4b1e-8120-86d03eb1d59c/bin/uautomizer-verify-aQ6SnzHsRB/witness.yml [2024-11-28 04:31:53,326 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-11-28 04:31:53,327 INFO L158 Benchmark]: Toolchain (without parser) took 6589.86ms. Allocated memory was 167.8MB in the beginning and 503.3MB in the end (delta: 335.5MB). Free memory was 129.8MB in the beginning and 339.8MB in the end (delta: -210.0MB). Peak memory consumption was 126.4MB. Max. memory is 16.1GB. [2024-11-28 04:31:53,327 INFO L158 Benchmark]: CDTParser took 0.41ms. Allocated memory is still 167.8MB. Free memory is still 104.2MB. There was no memory consumed. Max. memory is 16.1GB. [2024-11-28 04:31:53,328 INFO L158 Benchmark]: CACSL2BoogieTranslator took 358.91ms. Allocated memory is still 167.8MB. Free memory was 129.8MB in the beginning and 117.6MB in the end (delta: 12.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-11-28 04:31:53,328 INFO L158 Benchmark]: Boogie Procedure Inliner took 53.62ms. Allocated memory is still 167.8MB. Free memory was 117.6MB in the beginning and 116.2MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-28 04:31:53,328 INFO L158 Benchmark]: Boogie Preprocessor took 90.67ms. Allocated memory is still 167.8MB. Free memory was 116.2MB in the beginning and 113.2MB in the end (delta: 3.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-11-28 04:31:53,329 INFO L158 Benchmark]: RCFGBuilder took 669.86ms. Allocated memory is still 167.8MB. Free memory was 112.8MB in the beginning and 90.9MB in the end (delta: 22.0MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2024-11-28 04:31:53,332 INFO L158 Benchmark]: TraceAbstraction took 5228.32ms. Allocated memory was 167.8MB in the beginning and 503.3MB in the end (delta: 335.5MB). Free memory was 90.2MB in the beginning and 346.8MB in the end (delta: -256.5MB). Peak memory consumption was 84.4MB. Max. memory is 16.1GB. [2024-11-28 04:31:53,332 INFO L158 Benchmark]: Witness Printer took 181.50ms. Allocated memory is still 503.3MB. Free memory was 346.8MB in the beginning and 339.8MB in the end (delta: 7.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-11-28 04:31:53,334 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.41ms. Allocated memory is still 167.8MB. Free memory is still 104.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 358.91ms. Allocated memory is still 167.8MB. Free memory was 129.8MB in the beginning and 117.6MB in the end (delta: 12.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 53.62ms. Allocated memory is still 167.8MB. Free memory was 117.6MB in the beginning and 116.2MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 90.67ms. Allocated memory is still 167.8MB. Free memory was 116.2MB in the beginning and 113.2MB in the end (delta: 3.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * RCFGBuilder took 669.86ms. Allocated memory is still 167.8MB. Free memory was 112.8MB in the beginning and 90.9MB in the end (delta: 22.0MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * TraceAbstraction took 5228.32ms. Allocated memory was 167.8MB in the beginning and 503.3MB in the end (delta: 335.5MB). Free memory was 90.2MB in the beginning and 346.8MB in the end (delta: -256.5MB). Peak memory consumption was 84.4MB. Max. memory is 16.1GB. * Witness Printer took 181.50ms. Allocated memory is still 503.3MB. Free memory was 346.8MB in the beginning and 339.8MB in the end (delta: 7.0MB). 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, 89 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 5.1s, OverallIterations: 5, TraceHistogramMax: 3, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 76 SdHoareTripleChecker+Valid, 0.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 60 mSDsluCounter, 2891 SdHoareTripleChecker+Invalid, 0.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 2486 mSDsCounter, 31 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 498 IncrementalHoareTripleChecker+Invalid, 529 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 31 mSolverCounterUnsat, 405 mSDtfsCounter, 498 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 279 GetRequests, 244 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=95occurred in iteration=4, InterpolantAutomatonStates: 36, 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, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 2.7s InterpolantComputationTime, 430 NumberOfCodeBlocks, 430 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 459 ConstructedInterpolants, 0 QuantifiedInterpolants, 1122 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! [2024-11-28 04:31:53,363 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2836042-e3cd-4b1e-8120-86d03eb1d59c/bin/uautomizer-verify-aQ6SnzHsRB/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)