/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.use.bitabs.translation false -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/verifythis/tree_del_rec.c -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-21 10:33:00,743 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-21 10:33:00,809 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-12-21 10:33:00,813 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-21 10:33:00,814 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-21 10:33:00,834 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-21 10:33:00,835 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-21 10:33:00,835 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-21 10:33:00,835 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-21 10:33:00,838 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-21 10:33:00,838 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-21 10:33:00,839 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-21 10:33:00,839 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-21 10:33:00,840 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-21 10:33:00,840 INFO L153 SettingsManager]: * Use SBE=true [2023-12-21 10:33:00,840 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-21 10:33:00,840 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-21 10:33:00,841 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-21 10:33:00,841 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-21 10:33:00,841 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-21 10:33:00,841 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-21 10:33:00,841 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-21 10:33:00,841 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-21 10:33:00,841 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-21 10:33:00,842 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-21 10:33:00,842 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-21 10:33:00,842 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-21 10:33:00,842 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-21 10:33:00,842 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-21 10:33:00,843 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-21 10:33:00,843 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-21 10:33:00,843 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-21 10:33:00,843 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-21 10:33:00,844 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-21 10:33:00,844 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-21 10:33:00,844 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-21 10:33:00,844 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-21 10:33:00,844 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-21 10:33:00,844 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-21 10:33:00,844 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-21 10:33:00,844 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-21 10:33:00,845 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-21 10:33:00,845 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-21 10:33:00,845 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> false [2023-12-21 10:33:01,032 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-21 10:33:01,046 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-21 10:33:01,047 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-21 10:33:01,048 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-21 10:33:01,048 INFO L274 PluginConnector]: CDTParser initialized [2023-12-21 10:33:01,049 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/verifythis/tree_del_rec.c [2023-12-21 10:33:02,067 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-21 10:33:02,216 INFO L384 CDTParser]: Found 1 translation units. [2023-12-21 10:33:02,217 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/verifythis/tree_del_rec.c [2023-12-21 10:33:02,222 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/937a62bf4/b60e8609a5bd4a5f92ccce0e0a8ee1c0/FLAG03d641ca7 [2023-12-21 10:33:02,230 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/937a62bf4/b60e8609a5bd4a5f92ccce0e0a8ee1c0 [2023-12-21 10:33:02,232 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-21 10:33:02,233 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-21 10:33:02,234 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-21 10:33:02,234 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-21 10:33:02,242 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-21 10:33:02,242 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 10:33:02" (1/1) ... [2023-12-21 10:33:02,243 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@16591671 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:33:02, skipping insertion in model container [2023-12-21 10:33:02,243 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 10:33:02" (1/1) ... [2023-12-21 10:33:02,257 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-21 10:33:02,341 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/verifythis/tree_del_rec.c[585,598] [2023-12-21 10:33:02,355 WARN L1574 CHandler]: Possible shadowing of function min [2023-12-21 10:33:02,356 WARN L1574 CHandler]: Possible shadowing of function min [2023-12-21 10:33:02,363 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-21 10:33:02,371 INFO L202 MainTranslator]: Completed pre-run [2023-12-21 10:33:02,382 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/verifythis/tree_del_rec.c[585,598] [2023-12-21 10:33:02,386 WARN L1574 CHandler]: Possible shadowing of function min [2023-12-21 10:33:02,387 WARN L1574 CHandler]: Possible shadowing of function min [2023-12-21 10:33:02,393 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-21 10:33:02,403 INFO L206 MainTranslator]: Completed translation [2023-12-21 10:33:02,403 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:33:02 WrapperNode [2023-12-21 10:33:02,403 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-21 10:33:02,404 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-21 10:33:02,404 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-21 10:33:02,404 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-21 10:33:02,408 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:33:02" (1/1) ... [2023-12-21 10:33:02,416 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:33:02" (1/1) ... [2023-12-21 10:33:02,428 INFO L138 Inliner]: procedures = 29, calls = 61, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 71 [2023-12-21 10:33:02,429 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-21 10:33:02,429 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-21 10:33:02,429 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-21 10:33:02,429 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-21 10:33:02,436 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:33:02" (1/1) ... [2023-12-21 10:33:02,437 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:33:02" (1/1) ... [2023-12-21 10:33:02,439 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:33:02" (1/1) ... [2023-12-21 10:33:02,454 INFO L175 MemorySlicer]: Split 25 memory accesses to 4 slices as follows [16, 2, 5, 2]. 64 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [0, 2, 0, 0]. The 7 writes are split as follows [4, 0, 2, 1]. [2023-12-21 10:33:02,454 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:33:02" (1/1) ... [2023-12-21 10:33:02,454 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:33:02" (1/1) ... [2023-12-21 10:33:02,461 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:33:02" (1/1) ... [2023-12-21 10:33:02,463 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:33:02" (1/1) ... [2023-12-21 10:33:02,464 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:33:02" (1/1) ... [2023-12-21 10:33:02,465 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:33:02" (1/1) ... [2023-12-21 10:33:02,468 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-21 10:33:02,468 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-21 10:33:02,468 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-21 10:33:02,468 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-21 10:33:02,469 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:33:02" (1/1) ... [2023-12-21 10:33:02,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-21 10:33:02,481 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 10:33:02,490 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) [2023-12-21 10:33:02,496 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 [2023-12-21 10:33:02,514 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-21 10:33:02,514 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-21 10:33:02,514 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2023-12-21 10:33:02,515 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2023-12-21 10:33:02,515 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2023-12-21 10:33:02,515 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#3 [2023-12-21 10:33:02,515 INFO L130 BoogieDeclarations]: Found specification of procedure tree_del [2023-12-21 10:33:02,515 INFO L138 BoogieDeclarations]: Found implementation of procedure tree_del [2023-12-21 10:33:02,515 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-12-21 10:33:02,515 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-12-21 10:33:02,515 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-12-21 10:33:02,515 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-12-21 10:33:02,515 INFO L130 BoogieDeclarations]: Found specification of procedure min [2023-12-21 10:33:02,515 INFO L138 BoogieDeclarations]: Found implementation of procedure min [2023-12-21 10:33:02,515 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-12-21 10:33:02,516 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-12-21 10:33:02,516 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-12-21 10:33:02,516 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-12-21 10:33:02,516 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2023-12-21 10:33:02,516 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2023-12-21 10:33:02,516 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2023-12-21 10:33:02,516 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2023-12-21 10:33:02,516 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2023-12-21 10:33:02,516 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#3 [2023-12-21 10:33:02,516 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_tree [2023-12-21 10:33:02,516 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_tree [2023-12-21 10:33:02,517 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-21 10:33:02,517 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-12-21 10:33:02,517 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-12-21 10:33:02,517 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-12-21 10:33:02,517 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-12-21 10:33:02,517 INFO L130 BoogieDeclarations]: Found specification of procedure size [2023-12-21 10:33:02,517 INFO L138 BoogieDeclarations]: Found implementation of procedure size [2023-12-21 10:33:02,517 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-21 10:33:02,517 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-21 10:33:02,517 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-12-21 10:33:02,517 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-12-21 10:33:02,517 INFO L130 BoogieDeclarations]: Found specification of procedure tree_inorder [2023-12-21 10:33:02,518 INFO L138 BoogieDeclarations]: Found implementation of procedure tree_inorder [2023-12-21 10:33:02,518 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-21 10:33:02,603 INFO L241 CfgBuilder]: Building ICFG [2023-12-21 10:33:02,604 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-21 10:33:02,775 INFO L282 CfgBuilder]: Performing block encoding [2023-12-21 10:33:02,795 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-21 10:33:02,795 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-12-21 10:33:02,795 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 10:33:02 BoogieIcfgContainer [2023-12-21 10:33:02,795 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-21 10:33:02,797 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-21 10:33:02,797 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-21 10:33:02,799 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-21 10:33:02,799 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 10:33:02" (1/3) ... [2023-12-21 10:33:02,799 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@111e4be5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 10:33:02, skipping insertion in model container [2023-12-21 10:33:02,799 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:33:02" (2/3) ... [2023-12-21 10:33:02,799 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@111e4be5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 10:33:02, skipping insertion in model container [2023-12-21 10:33:02,800 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 10:33:02" (3/3) ... [2023-12-21 10:33:02,800 INFO L112 eAbstractionObserver]: Analyzing ICFG tree_del_rec.c [2023-12-21 10:33:02,811 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-21 10:33:02,811 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-21 10:33:02,843 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-21 10:33:02,848 INFO L357 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, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@e7fac59, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-21 10:33:02,848 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-21 10:33:02,851 INFO L276 IsEmpty]: Start isEmpty. Operand has 81 states, 50 states have (on average 1.28) internal successors, (64), 51 states have internal predecessors, (64), 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) [2023-12-21 10:33:02,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-12-21 10:33:02,857 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 10:33:02,858 INFO L195 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] [2023-12-21 10:33:02,858 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 10:33:02,861 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 10:33:02,861 INFO L85 PathProgramCache]: Analyzing trace with hash -1569702549, now seen corresponding path program 1 times [2023-12-21 10:33:02,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 10:33:02,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586854201] [2023-12-21 10:33:02,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 10:33:02,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 10:33:03,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:33:03,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-21 10:33:03,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:33:03,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-12-21 10:33:03,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:33:03,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-12-21 10:33:03,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:33:03,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-12-21 10:33:03,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:33:03,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-12-21 10:33:03,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:33:03,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 10:33:03,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 10:33:03,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586854201] [2023-12-21 10:33:03,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586854201] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 10:33:03,265 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 10:33:03,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-12-21 10:33:03,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673366419] [2023-12-21 10:33:03,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 10:33:03,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-21 10:33:03,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 10:33:03,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-21 10:33:03,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-12-21 10:33:03,288 INFO L87 Difference]: Start difference. First operand has 81 states, 50 states have (on average 1.28) internal successors, (64), 51 states have internal predecessors, (64), 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 3.0) internal successors, (24), 4 states have internal predecessors, (24), 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) [2023-12-21 10:33:03,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 10:33:03,692 INFO L93 Difference]: Finished difference Result 145 states and 202 transitions. [2023-12-21 10:33:03,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-21 10:33:03,695 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 4 states have internal predecessors, (24), 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 35 [2023-12-21 10:33:03,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 10:33:03,704 INFO L225 Difference]: With dead ends: 145 [2023-12-21 10:33:03,705 INFO L226 Difference]: Without dead ends: 85 [2023-12-21 10:33:03,707 INFO L412 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 [2023-12-21 10:33:03,710 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 117 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 342 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 432 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-21 10:33:03,710 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 157 Invalid, 432 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 342 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-21 10:33:03,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2023-12-21 10:33:03,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 80. [2023-12-21 10:33:03,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 49 states have (on average 1.163265306122449) internal successors, (57), 50 states have internal predecessors, (57), 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) [2023-12-21 10:33:03,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 104 transitions. [2023-12-21 10:33:03,743 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 104 transitions. Word has length 35 [2023-12-21 10:33:03,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 10:33:03,743 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 104 transitions. [2023-12-21 10:33:03,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 4 states have internal predecessors, (24), 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) [2023-12-21 10:33:03,743 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 104 transitions. [2023-12-21 10:33:03,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-12-21 10:33:03,745 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 10:33:03,745 INFO L195 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] [2023-12-21 10:33:03,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-21 10:33:03,746 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 10:33:03,746 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 10:33:03,746 INFO L85 PathProgramCache]: Analyzing trace with hash -1164948578, now seen corresponding path program 1 times [2023-12-21 10:33:03,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 10:33:03,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935992508] [2023-12-21 10:33:03,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 10:33:03,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 10:33:03,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:33:03,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-21 10:33:03,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:33:03,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-12-21 10:33:03,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:33:03,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-12-21 10:33:03,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:33:03,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-21 10:33:03,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:33:03,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-12-21 10:33:03,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:33:03,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2023-12-21 10:33:03,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:33:03,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2023-12-21 10:33:03,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:33:03,960 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-21 10:33:03,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 10:33:03,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935992508] [2023-12-21 10:33:03,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935992508] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 10:33:03,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968108287] [2023-12-21 10:33:03,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 10:33:03,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 10:33:03,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 10:33:03,978 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) [2023-12-21 10:33:04,019 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-21 10:33:04,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:33:04,091 INFO L262 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 25 conjunts are in the unsatisfiable core [2023-12-21 10:33:04,095 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 10:33:04,185 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-21 10:33:04,185 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 10:33:04,286 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-21 10:33:04,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [968108287] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 10:33:04,287 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-21 10:33:04,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 7] total 13 [2023-12-21 10:33:04,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498342897] [2023-12-21 10:33:04,288 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-21 10:33:04,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-12-21 10:33:04,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 10:33:04,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-12-21 10:33:04,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2023-12-21 10:33:04,289 INFO L87 Difference]: Start difference. First operand 80 states and 104 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 9 states have internal predecessors, (41), 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) [2023-12-21 10:33:04,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 10:33:04,776 INFO L93 Difference]: Finished difference Result 145 states and 191 transitions. [2023-12-21 10:33:04,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-21 10:33:04,776 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 9 states have internal predecessors, (41), 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 47 [2023-12-21 10:33:04,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 10:33:04,778 INFO L225 Difference]: With dead ends: 145 [2023-12-21 10:33:04,778 INFO L226 Difference]: Without dead ends: 85 [2023-12-21 10:33:04,778 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2023-12-21 10:33:04,779 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 127 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 619 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 715 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 619 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-21 10:33:04,780 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 252 Invalid, 715 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 619 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-21 10:33:04,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2023-12-21 10:33:04,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 82. [2023-12-21 10:33:04,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 50 states have (on average 1.16) internal successors, (58), 52 states have internal predecessors, (58), 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) [2023-12-21 10:33:04,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 107 transitions. [2023-12-21 10:33:04,788 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 107 transitions. Word has length 47 [2023-12-21 10:33:04,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 10:33:04,788 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 107 transitions. [2023-12-21 10:33:04,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 9 states have internal predecessors, (41), 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) [2023-12-21 10:33:04,789 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 107 transitions. [2023-12-21 10:33:04,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-12-21 10:33:04,790 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 10:33:04,790 INFO L195 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] [2023-12-21 10:33:04,796 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-21 10:33:04,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 10:33:04,996 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 10:33:04,997 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 10:33:04,997 INFO L85 PathProgramCache]: Analyzing trace with hash 146784617, now seen corresponding path program 1 times [2023-12-21 10:33:04,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 10:33:04,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115239191] [2023-12-21 10:33:04,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 10:33:04,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 10:33:05,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:33:05,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-21 10:33:05,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:33:05,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-21 10:33:05,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:33:05,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-12-21 10:33:05,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:33:05,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-12-21 10:33:05,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:33:05,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-12-21 10:33:05,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:33:05,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-21 10:33:05,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:33:05,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-12-21 10:33:05,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:33:05,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2023-12-21 10:33:05,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:33:05,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2023-12-21 10:33:05,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:33:05,193 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-12-21 10:33:05,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 10:33:05,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115239191] [2023-12-21 10:33:05,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115239191] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 10:33:05,193 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 10:33:05,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-12-21 10:33:05,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735709087] [2023-12-21 10:33:05,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 10:33:05,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-12-21 10:33:05,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 10:33:05,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-12-21 10:33:05,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2023-12-21 10:33:05,195 INFO L87 Difference]: Start difference. First operand 82 states and 107 transitions. Second operand has 11 states, 10 states have (on average 3.1) internal successors, (31), 7 states have internal predecessors, (31), 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) [2023-12-21 10:33:05,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 10:33:05,633 INFO L93 Difference]: Finished difference Result 145 states and 191 transitions. [2023-12-21 10:33:05,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-21 10:33:05,634 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.1) internal successors, (31), 7 states have internal predecessors, (31), 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 59 [2023-12-21 10:33:05,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 10:33:05,638 INFO L225 Difference]: With dead ends: 145 [2023-12-21 10:33:05,639 INFO L226 Difference]: Without dead ends: 87 [2023-12-21 10:33:05,642 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2023-12-21 10:33:05,644 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 156 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 518 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 644 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 518 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-21 10:33:05,648 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 201 Invalid, 644 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 518 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-21 10:33:05,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2023-12-21 10:33:05,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 84. [2023-12-21 10:33:05,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 51 states have (on average 1.1568627450980393) internal successors, (59), 54 states have internal predecessors, (59), 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) [2023-12-21 10:33:05,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 110 transitions. [2023-12-21 10:33:05,659 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 110 transitions. Word has length 59 [2023-12-21 10:33:05,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 10:33:05,660 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 110 transitions. [2023-12-21 10:33:05,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.1) internal successors, (31), 7 states have internal predecessors, (31), 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) [2023-12-21 10:33:05,660 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 110 transitions. [2023-12-21 10:33:05,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-12-21 10:33:05,661 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 10:33:05,662 INFO L195 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] [2023-12-21 10:33:05,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-21 10:33:05,662 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 10:33:05,662 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 10:33:05,662 INFO L85 PathProgramCache]: Analyzing trace with hash 1976244599, now seen corresponding path program 1 times [2023-12-21 10:33:05,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 10:33:05,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524091142] [2023-12-21 10:33:05,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 10:33:05,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 10:33:05,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:33:05,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-21 10:33:05,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:33:05,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-21 10:33:05,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:33:05,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-12-21 10:33:05,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:33:05,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-12-21 10:33:05,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:33:05,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-21 10:33:05,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:33:05,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-12-21 10:33:05,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:33:05,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2023-12-21 10:33:05,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:33:06,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-21 10:33:06,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:33:06,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-12-21 10:33:06,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:33:06,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2023-12-21 10:33:06,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:33:06,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2023-12-21 10:33:06,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:33:06,061 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-12-21 10:33:06,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 10:33:06,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524091142] [2023-12-21 10:33:06,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524091142] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 10:33:06,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724848348] [2023-12-21 10:33:06,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 10:33:06,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 10:33:06,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 10:33:06,076 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) [2023-12-21 10:33:06,077 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-21 10:33:06,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:33:06,179 INFO L262 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 15 conjunts are in the unsatisfiable core [2023-12-21 10:33:06,181 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 10:33:06,240 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-12-21 10:33:06,240 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-21 10:33:06,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1724848348] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 10:33:06,240 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-21 10:33:06,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [15] total 18 [2023-12-21 10:33:06,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448708335] [2023-12-21 10:33:06,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 10:33:06,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-21 10:33:06,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 10:33:06,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-21 10:33:06,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=271, Unknown=0, NotChecked=0, Total=306 [2023-12-21 10:33:06,242 INFO L87 Difference]: Start difference. First operand 84 states and 110 transitions. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 5 states have call predecessors, (11), 3 states have call successors, (11) [2023-12-21 10:33:06,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 10:33:06,343 INFO L93 Difference]: Finished difference Result 136 states and 178 transitions. [2023-12-21 10:33:06,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-21 10:33:06,343 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 5 states have call predecessors, (11), 3 states have call successors, (11) Word has length 72 [2023-12-21 10:33:06,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 10:33:06,344 INFO L225 Difference]: With dead ends: 136 [2023-12-21 10:33:06,344 INFO L226 Difference]: Without dead ends: 86 [2023-12-21 10:33:06,345 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=373, Unknown=0, NotChecked=0, Total=420 [2023-12-21 10:33:06,345 INFO L413 NwaCegarLoop]: 91 mSDtfsCounter, 34 mSDsluCounter, 467 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 558 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-21 10:33:06,345 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 558 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-21 10:33:06,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2023-12-21 10:33:06,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2023-12-21 10:33:06,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 52 states have (on average 1.1538461538461537) internal successors, (60), 56 states have internal predecessors, (60), 22 states have call successors, (22), 7 states have call predecessors, (22), 11 states have return successors, (31), 22 states have call predecessors, (31), 22 states have call successors, (31) [2023-12-21 10:33:06,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 113 transitions. [2023-12-21 10:33:06,352 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 113 transitions. Word has length 72 [2023-12-21 10:33:06,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 10:33:06,353 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 113 transitions. [2023-12-21 10:33:06,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 5 states have call predecessors, (11), 3 states have call successors, (11) [2023-12-21 10:33:06,353 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 113 transitions. [2023-12-21 10:33:06,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2023-12-21 10:33:06,355 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 10:33:06,355 INFO L195 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] [2023-12-21 10:33:06,360 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-21 10:33:06,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-12-21 10:33:06,560 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 10:33:06,560 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 10:33:06,560 INFO L85 PathProgramCache]: Analyzing trace with hash 1845875786, now seen corresponding path program 1 times [2023-12-21 10:33:06,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 10:33:06,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462888864] [2023-12-21 10:33:06,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 10:33:06,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 10:33:06,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-21 10:33:06,580 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-12-21 10:33:06,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-21 10:33:06,609 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-12-21 10:33:06,609 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-12-21 10:33:06,610 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-12-21 10:33:06,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-12-21 10:33:06,613 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2023-12-21 10:33:06,615 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2023-12-21 10:33:06,639 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.12 10:33:06 BoogieIcfgContainer [2023-12-21 10:33:06,639 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-21 10:33:06,639 INFO L158 Benchmark]: Toolchain (without parser) took 4406.44ms. Allocated memory is still 317.7MB. Free memory was 275.3MB in the beginning and 166.5MB in the end (delta: 108.8MB). Peak memory consumption was 110.1MB. Max. memory is 8.0GB. [2023-12-21 10:33:06,639 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 183.5MB. Free memory is still 131.1MB. There was no memory consumed. Max. memory is 8.0GB. [2023-12-21 10:33:06,639 INFO L158 Benchmark]: CACSL2BoogieTranslator took 169.80ms. Allocated memory is still 317.7MB. Free memory was 275.0MB in the beginning and 262.5MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. [2023-12-21 10:33:06,640 INFO L158 Benchmark]: Boogie Procedure Inliner took 25.05ms. Allocated memory is still 317.7MB. Free memory was 262.5MB in the beginning and 260.5MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-21 10:33:06,640 INFO L158 Benchmark]: Boogie Preprocessor took 38.58ms. Allocated memory is still 317.7MB. Free memory was 260.5MB in the beginning and 257.2MB in the end (delta: 3.3MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. [2023-12-21 10:33:06,640 INFO L158 Benchmark]: RCFGBuilder took 326.93ms. Allocated memory is still 317.7MB. Free memory was 257.2MB in the beginning and 234.4MB in the end (delta: 22.8MB). Peak memory consumption was 23.1MB. Max. memory is 8.0GB. [2023-12-21 10:33:06,640 INFO L158 Benchmark]: TraceAbstraction took 3842.33ms. Allocated memory is still 317.7MB. Free memory was 233.7MB in the beginning and 166.5MB in the end (delta: 67.2MB). Peak memory consumption was 68.2MB. Max. memory is 8.0GB. [2023-12-21 10:33:06,641 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 183.5MB. Free memory is still 131.1MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 169.80ms. Allocated memory is still 317.7MB. Free memory was 275.0MB in the beginning and 262.5MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 25.05ms. Allocated memory is still 317.7MB. Free memory was 262.5MB in the beginning and 260.5MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 38.58ms. Allocated memory is still 317.7MB. Free memory was 260.5MB in the beginning and 257.2MB in the end (delta: 3.3MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. * RCFGBuilder took 326.93ms. Allocated memory is still 317.7MB. Free memory was 257.2MB in the beginning and 234.4MB in the end (delta: 22.8MB). Peak memory consumption was 23.1MB. Max. memory is 8.0GB. * TraceAbstraction took 3842.33ms. Allocated memory is still 317.7MB. Free memory was 233.7MB in the beginning and 166.5MB in the end (delta: 67.2MB). Peak memory consumption was 68.2MB. Max. memory is 8.0GB. * 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: 16]: a call to reach_error is reachable a call to reach_error is reachable 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}, n={-1:0}] [L102] RET, EXPR nondet_tree() [L102] CALL task(nondet_tree()) [L78] CALL, EXPR min(t) VAL [n={-1:0}] [L37] COND FALSE !(!n) [L40] EXPR n->data [L40] int a = n->data; [L41] EXPR n->left VAL [a=2147483647, n={-1:0}, n={-1:0}] [L41] CALL, EXPR min(n->left) VAL [n={0:0}] [L37] COND TRUE !n [L38] return 2147483647; VAL [\result=2147483647, n={0:0}, n={0:0}] [L41] RET, EXPR min(n->left) VAL [a=2147483647, n={-1:0}, n={-1:0}] [L41] int b = min(n->left); [L42] EXPR n->right VAL [a=2147483647, b=2147483647, n={-1:0}, n={-1:0}] [L42] CALL, EXPR min(n->right) VAL [n={0:0}] [L37] COND TRUE !n [L38] return 2147483647; VAL [\result=2147483647, n={0:0}, n={0:0}] [L42] RET, EXPR min(n->right) VAL [a=2147483647, b=2147483647, n={-1:0}, n={-1:0}] [L42] int c = min(n->right); [L43] COND TRUE b <= a && b <= c [L43] return b; VAL [\result=2147483647, a=2147483647, b=2147483647, c=2147483647, n={-1:0}, n={-1:0}] [L78] RET, EXPR min(t) VAL [t={-1:0}, t={-1:0}] [L78] int a = min(t); [L79] int b; VAL [a=2147483647, b={5:0}, t={-1:0}, t={-1:0}] [L81] CALL, EXPR size(t) VAL [t={-1:0}] [L73] COND FALSE !(!t) [L74] EXPR t->left VAL [t={-1:0}, t={-1:0}] [L74] CALL, EXPR size(t->left) VAL [t={0:0}] [L73] COND TRUE !t [L73] return 0; VAL [\result=0, t={0:0}, t={0:0}] [L74] RET, EXPR size(t->left) VAL [t={-1:0}, t={-1:0}] [L74] EXPR t->right VAL [t={-1:0}, t={-1:0}] [L74] CALL, EXPR size(t->right) VAL [t={0:0}] [L73] COND TRUE !t [L73] return 0; VAL [\result=0, t={0:0}, t={0:0}] [L74] RET, EXPR size(t->right) VAL [t={-1:0}, 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}, t={-1:0}] [L81] int n = size(t); [L82] CALL assume_cycle_if_not(n != 0) [L9] COND FALSE !(!cond) VAL [\old(cond)=1, cond=1] [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}, t={-1:0}] [L83] int *x = calloc(n, sizeof(int)); VAL [a=2147483647, b={5:0}, n=1, t={-1:0}, t={-1:0}, x={-2:0}] [L84] CALL tree_inorder(t, x, n) VAL [\old(i)=1, a={-2:0}, t={-1:0}] [L62] COND FALSE !(!t) [L65] EXPR t->left VAL [\old(i)=1, a={-2:0}, a={-2:0}, i=1, t={-1:0}, t={-1:0}] [L65] CALL, EXPR tree_inorder(t->left, a, i) VAL [\old(i)=1, a={-2:0}, t={0:0}] [L62] COND TRUE !t [L63] return i; VAL [\old(i)=1, \result=1, a={-2:0}, a={-2:0}, i=1, t={0:0}, t={0:0}] [L65] RET, EXPR tree_inorder(t->left, a, i) VAL [\old(i)=1, a={-2:0}, a={-2:0}, i=1, t={-1:0}, 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(i)=1, a={-2:0}, a={-2:0}, i=2, t={-1:0}, t={-1:0}] [L67] CALL, EXPR tree_inorder(t->right, a, i) VAL [\old(i)=2, a={-2:0}, t={0:0}] [L62] COND TRUE !t [L63] return i; VAL [\old(i)=2, \result=2, a={-2:0}, a={-2:0}, i=2, t={0:0}, t={0:0}] [L67] RET, EXPR tree_inorder(t->right, a, i) VAL [\old(i)=1, a={-2:0}, a={-2:0}, i=2, t={-1:0}, t={-1:0}] [L67] i = tree_inorder(t->right, a, i) [L68] return i; VAL [\old(i)=1, \result=2, a={-2:0}, a={-2:0}, i=2, t={-1:0}, t={-1:0}] [L84] RET tree_inorder(t, x, n) VAL [a=2147483647, b={5:0}, n=1, t={-1:0}, t={-1:0}, x={-2:0}] [L85] EXPR x[0] [L85] CALL __VERIFIER_assert(a == x[0]) VAL [\old(cond)=0] [L16] COND TRUE !cond VAL [\old(cond)=0, cond=0] [L16] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 8 procedures, 81 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 3.8s, OverallIterations: 5, TraceHistogramMax: 3, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 1.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 452 SdHoareTripleChecker+Valid, 1.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 434 mSDsluCounter, 1168 SdHoareTripleChecker+Invalid, 0.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 955 mSDsCounter, 334 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1566 IncrementalHoareTripleChecker+Invalid, 1900 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 334 mSolverCounterUnsat, 213 mSDtfsCounter, 1566 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 278 GetRequests, 220 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=86occurred in iteration=4, InterpolantAutomatonStates: 37, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 11 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.3s InterpolantComputationTime, 416 NumberOfCodeBlocks, 416 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 372 ConstructedInterpolants, 0 QuantifiedInterpolants, 1053 SizeOfPredicates, 10 NumberOfNonLiveVariables, 630 ConjunctsInSsa, 40 ConjunctsInUnsatCore, 7 InterpolantComputations, 3 PerfectInterpolantSequences, 124/132 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! [2023-12-21 10:33:06,667 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...